A release control method, three-dimensional model slicing method, device and medium

Abstract

The present application provides a release control method, a three-dimensional model slicing method, a device and a medium, and relates to the field of 3D printing. The method includes: controlling the printing platform to be located at a printing position corresponding to the first model layer of the model to be printed, wherein the printing position corresponding to the first model layer is higher than or equal to the position to which the printing platform is lifted during the printing of the second model layer of the model to be printed, and the second model layer is the previous model layer of the first model layer; controlling the light source to emit a curing light to cure the printing material in the material tank to obtain the first model layer; controlling the moving mechanism to drive the first moving side of the material tank to move downward to tilt the material tank, and controlling the lifting of the printing platform to achieve the release of the first model layer.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and in particular to a release control method for a photocuring printing device, a three-dimensional model slicing method, a photocuring printing device, a computer device, and a readable storage medium. Background Art

[0002] At present, during the process of model layer release, the printing platform drives the model layer to rise, so that the model layer is separated from the release film in the material tank. During separation, the entire surface of the model layer is separated from the release film at the same time, and a large adhesion force is generated between the model layer and the release film, resulting in difficulty in release, prone to fracture and other phenomena, reducing the model printing quality, and even causing printing failure. Summary of the invention

[0003] In view of this, the present application provides a release control method for a photocuring printing device, a three-dimensional model slicing method, a photocuring printing device, a computer device and a readable storage medium, which improve the success rate of model release.

[0004] In a first aspect, an embodiment of the present application provides a release control method of a light-curing printing device, characterized in that the light-curing printing device includes a printing platform, a material tank, a light source, and a moving mechanism, and the method includes:

[0005] Controlling the printing platform to be located at a printing position corresponding to a first model layer of the model to be printed, wherein the printing position corresponding to the first model layer is higher than or equal to a position to which the printing platform is lifted during the printing of a second model layer of the model to be printed, the second model layer being a previous model layer of the first model layer;

[0006] Control the light source to emit curing light to cure the printing material in the material tank to obtain the first model layer;

[0007] The moving mechanism is controlled to drive the first moving side of the material trough to move downward to tilt the material trough, and the printing platform is controlled to lift to achieve the release of the first model layer.

[0008] In a second aspect, an embodiment of the present application provides a three-dimensional model slicing method, which is applied to generate a slicing file for a light-curing printing device to print a model, and the method includes:

[0009] Acquire three-dimensional data of the model to be printed;

[0010] Determine the placement position of the to-be-printed model on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device;

[0011] Slicing the model to be printed to generate model layers obtained by slicing the model to be printed;

[0012] Determine the minimum required release height corresponding to the model layer;

[0013] The slice file is obtained according to the model layer and the minimum required height for release.

[0014] In a third aspect, an embodiment of the present application provides a light-curing printing device, characterized in that it includes:

[0015] A material trough, used to hold printing materials;

[0016] A printing platform, located above the material trough, for carrying the printing model;

[0017] A light source, located below the material tank, for emitting curing light;

[0018] A moving mechanism, used to drive the first moving side of the trough to move downward or upward;

[0019] A memory storing programs or instructions;

[0020] A processor, wherein when the processor executes the program or instruction, the steps of the method according to the first aspect are implemented.

[0021] In a fourth aspect, an embodiment of the present application provides a computer device, which includes a processor and a memory, wherein the memory stores programs or instructions that can be executed on the processor, and when the programs or instructions are executed by the processor, the steps of the method of the second aspect are implemented.

[0022] In a fifth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the method of the first aspect or the second aspect are implemented.

[0023] In the embodiment of the present application, when printing the first model layer of the model to be printed, the printing platform is controlled to be located at the printing position corresponding to the first model layer, which is higher than or equal to the position to which the printing platform is lifted during the printing of the second model layer of the model to be printed, wherein the second model layer is the previous model layer of the first model layer, so that during the entire printing process of the model to be printed, the lifting height of the printing platform will not be too high, and the effect of continuous molding printing can be achieved. When releasing, the moving mechanism is controlled to drive the first moving side of the material trough to move downward, so that the material trough is tilted relative to the printing platform, so that the release film is gradually separated from the first model layer at a certain angle, thereby improving the success rate of release.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 A schematic flow chart showing a release control method of a light-curing printing device according to an embodiment of the present application is shown;

[0027] Figure 2 A schematic diagram showing the tilting of the trough in the case where the second side of the trough in the embodiment of the present application is a fixed side;

[0028] Figure 3 A schematic diagram showing the tilting of the trough in the case where the second side of the trough in the embodiment of the present application is a movable side;

[0029] Figure 4 A schematic flow chart of a three-dimensional model slicing method according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0031] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0032] In conjunction with the accompanying drawings, the release control method of the photocuring printing device, the three-dimensional model slicing method, the photocuring printing device, the computer device and the readable storage medium provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0033] The embodiment of the present application provides a release control method for a light-curing printing device, wherein the light-curing printing device includes a printing platform, a material tank, a light source, and a moving mechanism, such as Figure 1 As shown, the method includes:

[0034] Step 101, controlling the printing platform to be located at a printing position corresponding to a first model layer of a model to be printed, wherein the printing position corresponding to the first model layer is higher than or equal to a position to which the printing platform is lifted during printing of a second model layer of the model to be printed, and the second model layer is a model layer previous to the first model layer;

[0035] Step 102, controlling the light source to emit light to cure the printing material in the curing tank to obtain a first model layer;

[0036] Step 103, controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough, and controlling the printing platform to lift up to achieve release of the first model layer.

[0037] In this embodiment, when printing the first model layer of the model to be printed, the printing platform is controlled to be located at the printing position corresponding to the first model layer, and the printing position is also the exposure position of the first model layer. The printing position is higher than or equal to the position to which the printing platform is lifted during the printing of the second model layer of the model to be printed, wherein the second model layer is the previous model layer of the first model layer, and in terms of printing time, the second model layer is a model layer printed earlier than the first model layer. In one embodiment, when the second model layer is released from the mold, the first moving side of the material trough can be driven to move downward by controlling the moving mechanism and controlling the lifting of the printing platform, and the position to which the printing platform is lifted after the second model layer is released from the mold can be used as the position to which the printing platform is lifted during the printing of the second model layer.

[0038] That is to say, during the printing of the second model layer, the position to which the printing platform is lifted is lower than or equal to the printing position corresponding to the first model layer. When preparing to print the first model layer, the printing platform is controlled to move up or remain so that the printing platform is located above or equal to the position to which the printing platform is lifted during the printing of the second model layer. During the printing of the second model layer, the printing platform will not be lifted too high, and there will be no action of controlling the printing platform to be lowered when preparing to print the first model layer. Since the lifting height of the printing platform will not be too high during the entire printing process of the model to be printed, the effect of continuous molding printing can be achieved. And during release, the moving mechanism is controlled to drive the first moving side of the material trough to move downward, so that the material trough is tilted relative to the printing platform, so that the release film is gradually separated from the first model layer at a certain angle, thereby improving the success rate of release.

[0039] In some embodiments, when the printing platform is located at the printing position corresponding to the first model layer, the light source is controlled to emit curing light to achieve exposure, and the printing material in the material tank is cured to obtain the first model layer, and then the first model layer is released, that is, the first model layer is separated from the release film in the material tank. When releasing, the moving mechanism is controlled to drive the first moving side of the material tank to move downward, so that the material tank is tilted relative to the printing platform, and the release film is gradually separated from the first model layer at a certain angle, thereby reducing the adhesion between the model layer and the release film, reducing the risk of problems such as faults or slag, and improving the success rate of release.

[0040] In some embodiments, when the model layer is separated by only driving the first moving side of the trough to move downward, the separation force may be insufficient, resulting in separation failure or a long separation time. Therefore, the present application also controls the printing platform to lift up when the model layer is separated to drive the first model layer upward to achieve separation in both downward and upward directions, further improving the success rate of model separation and the speed of model separation.

[0041] In some other embodiments of the present application, the printing platform is controlled to be located at the printing position corresponding to the first model layer of the model to be printed, and the printing position corresponding to the first model layer may also be lower than the position to which the printing platform is lifted during the printing of the second model layer. In this case, since the position to which the printing platform is lifted during the printing of the second model layer is higher than the printing position corresponding to the first model layer, when the first model layer is ready to be printed, the printing platform is controlled to descend, and non-continuous molding printing is achieved in this way. This embodiment can be combined with the features in other embodiments of the present application to form a corresponding embodiment.

[0042] In one embodiment of the present application, the printing position corresponding to the first model layer is higher than or equal to the highest position to which the printing platform is raised during the printing process of the second model layer of the model to be printed; and / or

[0043] The printing position corresponding to the first model layer is higher than or equal to the position to which the printing platform is lifted at the end of the release process of the second model layer of the model to be printed; and / or

[0044] The printing position corresponding to the first model layer is higher than or equal to any position to which the printing platform is raised during the printing process of the second model layer of the model to be printed; and / or

[0045] The printing position corresponding to the first model layer is higher than or equal to the position to which the printing platform is lifted when the printing of the second model layer of the model to be printed is completed.

[0046] In this embodiment, the position to which the printing platform is lifted during the printing of the second model layer may be the highest position to which the printing platform is lifted during the printing of the second model layer, or the position to which the printing platform is lifted when the release process of the second model layer is completed, or any position to which the printing platform is lifted during the printing of the second model layer, or the position to which the printing platform is lifted when printing of the second model layer is completed.

[0047] By making the printing position corresponding to the first model layer higher than or equal to the above position when printing the second model layer, the lifting height of the printing platform will not be too high during the entire printing process of the model to be printed, so as to achieve the effect of continuous molding printing.

[0048] In one embodiment of the present application, controlling the printing platform to be located at a printing position corresponding to the first model layer includes:

[0049] When the position to which the printing platform is lifted during the printing of the second model layer is lower than the printing position corresponding to the first model layer, the printing platform is controlled to move up to the printing position corresponding to the first model layer; or

[0050] When the position to which the printing platform is lifted during the printing of the second model layer is equal to the printing position corresponding to the first model layer, the printing platform is controlled to remain at the printing position corresponding to the first model layer.

[0051] In this embodiment, the position to which the printing platform is lifted during the printing of the second model layer may be lower than the printing position corresponding to the first model layer. In this case, when preparing to print the first model layer, it is necessary to control the printing platform to move up to the printing position corresponding to the first model layer, and then print the first model layer.

[0052] During the printing of the second model layer, the position to which the printing platform is lifted can also be level with the printing position corresponding to the first model layer. In this case, when preparing to print the first model layer, there is no need to control the printing platform to move up or down, but only to control the printing platform to remain at the printing position corresponding to the first model layer, and then print the first model layer.

[0053] In one embodiment of the present application, during the release process of the first model layer, the sum of the moving distance of the first moving side of the trough moving downward and the model layer thickness of the first model layer is greater than or equal to the total release height of the first model layer. The total release height mentioned in this specification is composed of the total lifting height of the printing platform during the printing of the current model layer and the displacement of the corresponding position of the model layer caused by the downward movement of the first moving side of the trough.

[0054] In this embodiment, during the release process of the first model layer, the following conditions must be met: the moving distance of the first moving side of the trough moving downward + the model layer thickness of the first model layer ≧ the total release height of the first model layer. The sum of the moving distance of the first moving side of the trough moving downward and the model layer thickness of the first model layer, that is, the actual release height of the first model layer, must be at least equal to the total release height of the first model layer, and may also be greater than the total release height of the first model layer. When the actual release height of the first model layer is greater than or equal to the total release height of the first model layer, it can be ensured that the printing platform only needs to be lifted or maintained in position during the printing process, and does not need to be lowered, thereby ensuring continuous molding and printing.

[0055] In one embodiment of the present application, one or more of the following embodiments are combined:

[0056] During the release process of the first model layer, the sum of the downward movement distance of the first moving side of the trough and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer;

[0057] The corresponding position of at least one position of the first model layer in the material trough is determined as the first corresponding position, when the first moving side moves down to the first set position, the first corresponding position moves down by a first moving distance, and during the release process of the first model layer, the sum of the first moving distance and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer;

[0058] Determine a second corresponding position of the first model layer in the material trough, and determine a moving distance of a portion of the second corresponding position closest to the first moving side when it moves downward as a second moving distance. During the release process of the first model layer, the sum of the second moving distance and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer.

[0059] Determine a third corresponding position of the first model layer in the material trough, determine a moving distance of a portion of the third corresponding position farthest from the first moving side downward as a third moving distance, and during the release process of the first model layer, a sum of the third moving distance and a model layer thickness of the first model layer is greater than or equal to a minimum required release height of the first model layer;

[0060] During the release process of the first model layer, the sum of the downward movement distance of the opposite side of the first moving side of the material trough and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer.

[0061] In this embodiment, the total release height of the first model layer may be the minimum required release height of the first model layer, and the minimum required release height of the first model layer refers to the minimum release height that can ensure smooth release of the first model layer.

[0062] The trough includes a first moving side and a side opposite to the first moving side, the part of the trough closest to the first moving side may be an edge of the first moving side, and the part of the trough farthest from the first moving side may be a part of the edge farthest from the first moving side, such as a part of the side opposite to the first moving side. The part of the trough closest to the first moving side is the position with the largest movement amplitude in the trough, and the part of the trough closest to the side opposite to the first moving side is the position with the smallest movement amplitude in the trough.

[0063] During the release process of the first model layer, the sum of the downward movement distance of the first moving side of the trough and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer to ensure continuous molding and printing. Or,

[0064] The corresponding position of at least one position of the first model layer in the material trough is determined as the first corresponding position. When the first movable side moves down to the first set position (that is, when the first movable side moves down to the position), the first corresponding position moves down by the first moving distance. In other words, the first corresponding position of the first model layer on the material trough is determined, and the distance the first corresponding position moves down is used as the first moving distance. The sum of the first moving distance and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer.

[0065] Alternatively, the second corresponding position of the first model layer in the material trough is determined, and the moving distance of the part of the second corresponding position closest to the first moving side when it moves downward is determined as the second moving distance, and the sum of the second moving distance and the model layer thickness of the first model layer is greater than or equal to the minimum required height for release of the first model layer. Since the part of the first model layer in the corresponding position on the material trough that is closest to the first moving side is the position with the largest movement amplitude, it can be ensured that the actual release height of the first model layer (that is, the sum of the first moving distance and the model layer thickness of the first model layer) is greater than or equal to the minimum required height for release of the first model layer.

[0066] In other embodiments, the downward movement distance (i.e., the third movement distance) of the portion of the first model layer farthest from the first moving side in the corresponding position on the material trough can also be determined, and the sum of the third movement distance and the model layer thickness of the first model layer is greater than or equal to the minimum required height of the first model layer for release; or, the sum of the downward movement distance of the side opposite to the first moving side of the material trough and the model layer thickness of the first model layer is greater than or equal to the minimum required height of the first model layer for release.

[0067] In one embodiment of the present application, the method further includes:

[0068] Obtaining a slicing file, and if the obtained slicing file does not carry the first identifier, determining the minimum required release height of the first model layer according to the release height of each model layer in the slicing file; or,

[0069] Obtaining a slice file, and if the obtained slice file carries a first identifier, determining the minimum required release height of the first model layer according to the minimum required release height of each model layer in the slice file; or,

[0070] The minimum required release height of the first model layer is determined according to one or more of the area of ​​the first model layer, the exposure time, and the exposure energy.

[0071] In this embodiment, the minimum required release height of the first model layer is obtained by:

[0072] (1) Acquire according to the slicing file. Acquire the slicing file, and determine whether the acquired slicing file carries a first identifier. The first identifier can be a tilted release printable identifier, and the tilted release printable identifier is used to indicate whether the slicing file is a slicing file specially customized for a printing device adapted for tilted release. If the slicing file does not carry the first identifier, indicating that the slicing file is not a slicing file specially customized for a printing device adapted for tilted release, the minimum required release height is determined according to the release height of the model layer in the slicing file. For example, the release height of the first model layer in the slicing file is used as the minimum required release height of the first model layer; or, the average or median value of the release height of each model layer in the slicing file is used as the minimum required release height of the first model layer.

[0073] If the slice file carries a first mark, indicating that the slice file is a slice file specially customized for a printing device adapted for inclined release, the minimum required release height is determined according to the minimum required release height of the model layer in the slice file. For example, the minimum required release height of the first model layer in the slice file is used as the minimum required release height of the first model layer; or the average or median value of the minimum required release height of each model layer in the slice file is used as the minimum required release height of the first model layer.

[0074] The minimum required release height may be related to one or more of the equipment type, exposure time, exposure energy, model area, resin type, and printing environment temperature / humidity.

[0075] (2) Determine a minimum required release height corresponding to the first model layer according to one or more of the model area, exposure time, and exposure energy.

[0076] In the embodiment of the present application, the minimum required release height of the first model layer can be determined in a variety of ways, so that the minimum required release height is used as a limiting condition to control printing and achieve continuous molding printing.

[0077] In one embodiment of the present application, the maximum distance or the minimum distance between the molding position on the trough corresponding to the model to be printed and the first moving side of the trough is determined as the first target distance, wherein the first target distance is less than or equal to the first preset distance, or the first target distance accounts for the percentage of the distance between the first moving side of the trough and the opposite side of the first moving side of the trough as the first target percentage; the method also includes: ensuring that the first target percentage is less than or equal to the first preset percentage, the first preset percentage is any percentage from 90% to 0%, for example, 85%, 80%, 75%, 70%, 60%, 50%, 40%, 30%, 25%, 20%, 15%, 10%, 5%, 2%, etc.; ensuring that the first target percentage is less than or equal to the first preset percentage, including: if the first target percentage is greater than the first preset percentage, modifying the exposure image of each model layer of the model to be printed to move the molding position on the trough corresponding to the model to be printed until the first target percentage is less than or equal to the first preset percentage; or,

[0078] The maximum distance or the minimum distance between the molding position on the trough corresponding to the model to be printed and the opposite side of the first moving side of the trough is determined as the second target distance, wherein the second target distance is greater than or equal to the second preset distance, or the percentage of the second target distance in the distance between the first moving side of the trough and the opposite side of the first moving side of the trough is the second target percentage; the method also includes: ensuring that the second target percentage is greater than or equal to the second preset percentage, the second preset percentage is any percentage from 0% to 20%, for example 0%, 5%, 7%, 10%, 12%, 15%, 18%, 20%, etc.; ensuring that the second target percentage is greater than or equal to the second preset percentage, including: if the second target percentage is less than the second preset percentage, modifying the exposure image of each model layer of the model to be printed to move the molding position on the trough corresponding to the model to be printed until the second target percentage is greater than or equal to the second preset percentage.

[0079] In order to achieve higher precision photocuring printing and avoid jagged edges on the model, the printed model usually pursues a smaller model layer thickness. However, if the model layer thickness is too small, it will affect the realization of the inequality "the moving distance of the first moving side of the trough moving downward + the model layer thickness of the first model layer ≧ the total release height of the first model layer". In order for this inequality to hold, it is necessary to rely on a larger moving distance of the first moving side of the trough moving downward. In one embodiment of the present application, the downward moving distance of the first moving side of the trough can be ensured to be larger by controlling the molding position of the model to be printed on the trough to be closer to the first moving side of the trough.

[0080] In one embodiment, the molding position of the model to be printed corresponding to the material slot is determined, and the maximum distance or the minimum distance between the molding position of the model to be printed and the first moving side of the material slot is determined as the first target distance. The first target distance is less than or equal to the first preset distance, or the first target distance is the percentage of the distance between the first moving side of the material slot and the opposite side of the first moving side of the material slot as the first target percentage. The material slot includes two long sides and two short sides. If the first moving side is one of the long sides and the opposite side of the first moving side is the other long side, the distance between the first moving side of the material slot and the opposite side of the first moving side can be the length of the material slot; if the first moving side is one of the short sides and the opposite side of the first moving side is the other short side, the distance between the first moving side of the material slot and the opposite side of the first moving side can be the width of the material slot. That is, the percentage of the first target distance in the length or width of the material slot is the first target percentage, and the first target percentage is less than or equal to the first preset percentage, and the first preset percentage is any percentage from 90% to 0%, so that the molding position of the model to be printed is closer to the first moving side of the material slot.

[0081] If the first target percentage is greater than the first preset percentage, the exposure images of each model layer of the model to be printed are modified to move the molding position of the model to be printed corresponding to the trough, so as to satisfy that the first target percentage is less than or equal to the first preset percentage.

[0082] In another embodiment, the molding position corresponding to the model to be printed on the trough is determined, and the maximum distance or minimum distance between the molding position of the model to be printed and the opposite side of the first moving side of the trough is determined as the second target distance. The second target distance is greater than or equal to the second preset distance, or the percentage of the distance between the first moving side of the trough and the opposite side of the first moving side of the trough is the second target percentage. The trough includes two long sides and two short sides. If the first moving side is one of the long sides and the opposite side of the first moving side is the other long side, the distance between the first moving side of the trough and the opposite side of the first moving side can be the length of the trough; if the first moving side is one of the short sides and the opposite side of the first moving side is the other short side, the distance between the first moving side of the trough and the opposite side of the first moving side can be the width of the trough. That is to say, the percentage of the second target distance to the length or width of the trough is the second target percentage, and the second target percentage is greater than or equal to the second preset percentage, and the second preset percentage is any percentage between 0% and 20%, so that the molding position of the model to be printed is further away from the opposite side of the first moving side of the trough.

[0083] If the second target percentage is less than the second preset percentage, the exposure images of each model layer of the model to be printed are modified to move the molding position of the model to be printed corresponding to the trough, so as to satisfy that the second target percentage is greater than or equal to the second preset percentage.

[0084] Through the above implementation, the distance between the molding position of the model to be printed on the trough and the first moving side of the trough or the distance between the opposite side of the first moving side of the trough is limited, so that the molding position of the model to be printed on the trough is more appropriate, ensuring continuous printing of model layers, improving the speed and effect of model layer release, and improving the model printing speed.

[0085] In one embodiment, the first preset percentage is 0% to 50%, and can be 10%, and the first target distance between the molding position of the to-be-printed model on the trough and the first moving side of the trough is 1 / 10 of the length of the trough; or the second preset percentage is 10% to 20%, and can be 15%. Through the above method, the molding position of the to-be-printed model on the trough is closer to the first moving side of the trough, which is more conducive to achieving a larger moving distance of the first moving side of the trough.

[0086] In one embodiment of the present application, before starting printing of the model to be printed, the method further includes:

[0087] If it is detected that the moving mechanism is in working mode, it is detected whether the molding position of the model to be printed corresponding to the material trough is in the first printing area. If so, the printing program is normally executed; if not, the molding position of the model to be printed on the material trough is adjusted to be in the first printing area;

[0088] If it is detected that the moving mechanism is in sleep mode, it is detected whether the molding position of the model to be printed on the material trough is in the second printing area. If so, the printing program is executed normally. If not, the molding position of the model to be printed on the material trough is adjusted to be in the second printing area.

[0089] The second printing area includes the first printing area; or the second printing area includes a first sub-area and a second sub-area, the first sub-area overlaps with the first printing area, the second sub-area is located outside the first sub-area, and the second sub-area has no overlapping area with the first printing area.

[0090] In this embodiment, when it is detected that the moving mechanism turns on the working mode, it is determined that the model layer is separated by moving the trough downward. Optionally, it is detected whether the molding position of the model to be printed corresponding to the trough is in the first printing area. The first printing area can be an area close to the first moving side of the trough. If it is in the first printing area, it indicates that the molding position of the model to be printed is appropriate, and normal printing is performed at this time; if it is not in the first printing area, it indicates that the molding position of the model to be printed is not appropriate, and there is a risk of printing failure such as failure to print the model or failure to separate. At this time, the molding position of the model to be printed on the trough is adjusted so that it is in the first printing area, which can increase the printing success rate.

[0091] Through the above method, the molding position of the model to be printed on the material trough is made more suitable, ensuring the continuous printing of the model layer and improving the speed and effect of the model layer release.

[0092] When it is detected that the moving mechanism is in sleep mode, it is determined that during the release process of the model layer, the first moving side of the trough is fixed, that is, the model layer is not released by moving the first moving side of the trough downward. Optionally, it is detected whether the molding position of the model to be printed corresponding to the trough is in the second printing area. If it is in the second printing area, it indicates that the molding position of the model to be printed is appropriate, and normal printing is performed at this time; if it is not in the second printing area, it indicates that the molding position of the model to be printed is not appropriate. At this time, the molding position of the model to be printed on the trough is adjusted so that it is in the second printing area to improve the printing success rate.

[0093] The second printing area includes the first printing area; the second printing area includes the first sub-area and the second sub-area, the second sub-area is located outside the first sub-area, the first sub-area completely overlaps with the first printing area, and the second sub-area has no overlapping area with the first printing area. In this way, the second printing area includes the first printing area, so that the printing area of ​​the material slot when the mobile mechanism is in the sleep mode is larger than the printing area of ​​the material slot when the mobile mechanism is in the working mode, so that the light-curing printing device can achieve more flexible printing.

[0094] The molding position of the model to be printed on the material trough can be adjusted by adjusting the placement of the printed model on the printing platform, by shifting the area to be exposed of the exposure image, or by adjusting the placement of the printed model on the material trough.

[0095] In one embodiment of the present application, a method of adjusting the molding position of the to-be-printed model on the trough includes:

[0096] Modify the exposure image of each model layer of the model to be printed to move the molding position of the model to be printed corresponding to the molding position on the material tank; or,

[0097] Adjust the position of the model to be printed on the printing platform to adjust the molding position of the model to be printed on the trough; or,

[0098] Adjust the position of the printing platform to adjust the molding position of the model to be printed on the trough.

[0099] In this embodiment, the molding position of the model to be printed on the material trough can be moved by modifying the exposure images of each model layer of the model to be printed, or the molding position of the model to be printed on the material trough can be adjusted by adjusting the position of the model to be printed on the printing platform, or the molding position of the model to be printed on the material trough can be adjusted by adjusting the position of the printing platform.

[0100] The embodiments of the present application define a plurality of ways of adjusting the molding position of the model to be printed on the material trough, thereby achieving flexible adjustment of the molding position of the model to be printed on the material trough to meet different printing requirements.

[0101] In one embodiment of the present application, before starting printing of the model to be printed, the method further includes:

[0102] Moving the to-be-cured portion of the exposed image of at least a portion of the model layer of the to-be-printed model toward a position close to the first moving side of the material trough;

[0103] The to-be-cured portions of the exposed images of all model layers of the to-be-printed model are moved toward a position close to the first moving side of the material trough.

[0104] In this embodiment, the to-be-cured portion of the exposed image of at least a portion of the model layer of the model to be printed is moved toward a position close to the first movable side of the material trough, wherein at least a portion of the model layer of the model to be printed may be a model layer outside the base, may be only the model layer of the base, or may be all the model layers.

[0105] It should be noted that if only the model layer outside the base is moved, or only the model layer of the base is moved, it is necessary to ensure that after the movement, the projection area of ​​the model layer outside the base still falls within the projection area of ​​the model layer of the base, so as to ensure that the function of the base is realized.

[0106] Alternatively, the to-be-cured portions of the exposed images of all model layers of the to-be-printed model may be moved toward a position close to the first moving side of the material trough.

[0107] Through the above method, the molding position corresponding to the model to be printed on the trough is closer to the first moving side of the trough, which is more conducive to achieving a larger moving distance of the first moving side of the trough, ensuring that the inequality condition of the moving distance of the first moving side of the trough moving downward + the model layer thickness of the first model layer ≧ the total release height of the first model layer is satisfied, and continuous molding and printing are achieved. In addition, it can avoid the deficiency of actual release height = model layer thickness + downward movement distance of the trough, and improve the printing success rate. In addition, when facing models with smaller layer thickness, continuous molding and printing can be achieved while achieving successful release, which can improve the model printing precision and enhance the user printing experience.

[0108] In this way, the downward movement of the first movable side may not be completed completely, so that the first movable side of the trough can achieve the downward movement range of the trough required for release with a smaller movement amount, thereby improving the printing speed.

[0109] In one embodiment, the photocuring printing device further comprises an upper base plate, the upper base plate is provided with a slot for placing the material feeding trough; the moving mechanism comprises a driving device and a displacement structure, the displacement structure is connected to the first moving side of the material trough, the driving device drives the displacement structure to realize the movement of the first moving side of the material trough, that is, the first moving side is the side of the material trough that can move relative to the upper base plate, wherein the displacement structure comprises one of a cam, a cylinder and a screw. For example, in the inclined release method in which the cam drives the first moving side of the material trough to move downward, the cam can achieve release by only moving 1 / 3 of a circle, and the remaining 2 / 3 of a circle can be completed faster to reset, or directly reversed 1 / 3 to reset. Alternatively, if the inclined release method is driven by other structures such as a cylinder and a screw to move the material trough downward, the moving distance can be shortened, that is, the cylinder and the screw do not need to drive the first moving side of the material trough to move downward a long distance.

[0110] In one embodiment of the present application, the method further includes: after controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough, controlling the moving mechanism to drive the first moving side of the trough to move upward.

[0111] In this embodiment, when the model layer is released, the first moving side of the trough will move downward to realize the release of the model layer. After the release is completed, the trough needs to be returned to the original position to print the next model layer. The control moving mechanism drives the first moving side of the trough to move upward. In this way, the trough is returned to the original position in time after release, which facilitates the printing of the next model layer and improves the printing efficiency.

[0112] In one embodiment of the present application, the method further includes: in response to a model printing instruction of the model to be printed or a start printing instruction of one layer of the model to be printed, obtaining a sensing signal of a sensing component of the moving mechanism, wherein when the first moving side is located at a position where the bottom surface of the material trough is parallel to the printing platform, the sensing component sends a first sensing signal, and / or, when the first moving side is located at a preset reset position, the sensing component sends a second sensing signal; when the first moving side is located at other positions where the bottom surface of the material trough is not parallel to the printing platform, the sensing component sends a third sensing signal, and / or, when the first moving side is located at other positions deviating from the preset reset position, the sensing component sends a fourth sensing signal;

[0113] If the first sensing signal and / or the second sensing signal is obtained, printing of the model to be printed is executed;

[0114] If the third sensing signal and / or the fourth sensing signal is obtained, the moving mechanism is controlled to drive the first moving side of the trough to move until the first sensing signal and / or the second sensing signal is obtained.

[0115] In this embodiment, the moving mechanism includes a sensing component for sensing whether the bottom surface of the material trough is in a parallel position with the printing platform or whether the material trough returns to its original position.

[0116] In one embodiment, the moving mechanism further includes a rotating middle plate, which is fixedly connected to the material trough; the sensing component includes a sensor and a sensing sheet, the sensor is arranged on the upper bottom plate, the sensing sheet is arranged on the rotating middle plate, and the sensing sheet and the sensor cooperate with each other to generate a sensing signal. For example, the sensing sheet is a piezoelectric material, when the rotating middle plate drives the first moving side of the material trough to move upward so that the rotating middle plate contacts the upper bottom plate, the sensing sheet is subjected to the pressure of the upper bottom plate, and a charge or voltage change will be generated, and the sensor can measure this change and convert it into an electrical signal.

[0117] When the first moving side is located in a position where the bottom surface of the material trough is parallel to the printing platform, the sensing component sends a first sensing signal, and / or, when the first moving side is located in a preset reset position, the sensing component sends a second sensing signal; when the first moving side is located in other positions where the bottom surface of the material trough is not parallel to the printing platform, the sensing component sends a third sensing signal, and / or, when the first moving side is located in other positions deviating from the preset reset position, the sensing component sends a fourth sensing signal. The first sensing signal may be determined to be the first sensing signal when the third sensing signal is not received; conversely, the third sensing signal may be determined to be the third sensing signal when the first sensing signal is not received. The second sensing signal may be determined to be the second sensing signal when the fourth sensing signal is not received; conversely, the fourth sensing signal may be determined to be the fourth sensing signal when the second sensing signal is not received.

[0118] In response to a model printing instruction of a model to be printed or a start printing instruction of one layer of a model to be printed, a sensing signal of a sensing component of a moving mechanism is obtained. When the sensing signal of the sensing component obtained is a first sensing signal and / or a second sensing signal, it indicates that the bottom surface of the material trough is in a parallel position with the printing platform or the first moving side of the material trough is in a preset reset position, and the printing of the model to be printed is executed at this time. Avoid the situation where the bottom surface of the material trough is not in a parallel position with the printing platform or the first moving side of the material trough is not in a preset reset position, which causes uneven flow of printing material in the material trough or uneven thickness of the printed model layer, thereby affecting the printing quality and accuracy.

[0119] When the sensing signal obtained by the sensing component is the third sensing signal and / or the fourth sensing signal, it indicates that the bottom surface of the material trough is not parallel to the printing platform or the first movable side of the material trough is not in the preset reset position. In this case, the position of the material trough needs to be adjusted to control the movement of the first movable side, which includes moving upward or downward, until the first sensing signal and / or the second sensing signal is obtained, and then the printing of the model to be printed is executed.

[0120] By adopting the above method, it is avoided that the trough fails to return to its original position after moving downward after the last printing is completed or the previous model layer is released, or the bottom surface of the trough is not parallel to the printing platform due to other reasons such as collision, which affects the printing quality and accuracy.

[0121] In one embodiment of the present application, the method further includes: after the printing of the model to be printed is completed, controlling the moving mechanism to drive the first moving side of the material trough to move until the first sensing signal and / or the second sensing signal is obtained.

[0122] In this embodiment, after the entire printing model is printed, the material trough is returned and reset. The control moving mechanism drives the first moving side of the material trough to move upward, and uses the sensing component to detect whether the material trough returns to the preset reset position, that is, whether it returns and resets in place, or detects whether the bottom surface of the material trough is parallel to the printing platform. In the process of controlling the first moving side of the material trough to move upward, it is determined in real time whether the sensing component generates a first sensing signal and / or a second sensing signal. When the first sensing signal and / or the second sensing signal are generated, it indicates that the material trough has returned and reset in place or the bottom surface of the material trough is parallel to the printing platform. In this way, it is ensured that the material trough is returned and reset in time and accurately after the current model is printed, which is convenient for the next model printing to improve the printing effect and efficiency.

[0123] In one embodiment of the present application, the method further includes:

[0124] During the printing process of the model to be printed, if the first sensing signal and / or the second sensing signal is not obtained within a first preset time period, the printing is stopped and a warning signal is issued; and / or,

[0125] During the printing process of the model to be printed, if the third sensing signal and / or the fourth sensing signal is not obtained within the second preset time period, the printing is stopped and a warning signal is issued;

[0126] During the printing process of the model to be printed, if the first sensing signal and / or the second sensing signal are not obtained within the first preset time period, and / or the third sensing signal and / or the fourth sensing signal are not obtained within the second preset time period, the current of the driving device of the moving mechanism is obtained, and it is determined whether an abnormality occurs in the driving device based on the current.

[0127] In this embodiment, during the printing process, if the sensing component fails to obtain the first sensing signal and / or the second sensing signal within the first preset time period, or fails to obtain the third sensing signal and / or the fourth sensing signal within the second preset time period, it indicates that the position of the material trough has not changed for a long time, and an abnormality may occur in the driving device of the moving mechanism, such as a drive device jam or power failure. At this time, the light-curing printing device is controlled to stop printing, and a prompt signal of printing abnormality is issued, or the current of the drive device is detected to determine whether the drive device is jammed or powered off.

[0128] The first preset time length and the second preset time length may be equal, or the first preset time length is longer than the second preset time length, or the second preset time length is longer than the first preset time length. The first preset time length and the second preset time length may be less than the printing time of printing one model layer or printing a preset number of model layers.

[0129] Through the above method, when the material trough does not change its position for a long time, printing is stopped, a reminder is issued, and an abnormality is determined, so that the user can check the abnormality and take corresponding measures in time to avoid the problem of printing not being able to proceed smoothly.

[0130] In one embodiment of the present application, controlling the moving mechanism to drive the first moving side of the material trough to move downward, and controlling the printing platform to lift, includes:

[0131] Control the moving mechanism to drive the first moving side of the trough to move downward, and control the printing platform to lift up; or,

[0132] Control the moving mechanism to drive the first moving side of the trough to move downward for a third preset time or a first preset height, or after moving downward to the first preset position, control the printing platform to lift and the first moving side of the trough to move downward; or,

[0133] The printing platform is controlled to be lifted for a fourth preset time period or a second preset height, or lifted to a second preset position, and then the moving mechanism is controlled to drive the first moving side of the material trough to move downward and lift the printing platform.

[0134] In this embodiment, during release, the first movable side of the material trough can be controlled to move downward and the printing platform can be controlled to lift up. By performing release in both downward and upward directions at the same time, the speed of model release is increased and a better release effect can be achieved.

[0135] Alternatively, the moving mechanism may be controlled to drive the first moving side of the trough to move downward for a third preset time or a first preset height, or to move downward to a first preset position, and then the printing platform may be controlled to be lifted and the first moving side of the trough may be controlled to move downward at the same time. In other words, the first moving side of the trough may be controlled to move downward first, so that a small angle of separation occurs between the first model layer and the release film at the initial stage of release, and then the printing platform may be controlled to be lifted and the first moving side of the trough may be controlled to move downward for formal release, thereby avoiding the problem of model layer fracture or slag falling caused by applying large release forces in two directions at the initial stage of release, thereby ensuring printing accuracy.

[0136] It is also possible to first control the printing platform to be lifted for a fourth preset time period or a second preset height, or to be lifted to a second preset position, and then simultaneously control the first movable side of the trough to move downward and the printing platform to be lifted.

[0137] In one embodiment of the present application, controlling the moving mechanism to drive the first moving side of the trough to move downward includes:

[0138] Control the moving mechanism to drive the first moving side of the trough to move downward for a fifth preset time period; or,

[0139] Control the moving mechanism to drive the first moving side of the trough to move downward to a third preset height, where the third preset height is equal to the difference between the release height of the first model layer and the lifting height of the printing platform; or,

[0140] The control moving mechanism drives the first moving side of the material trough to move downward from the first position to the second position, and the height difference between the first position and the second position is greater than or equal to the difference between the release height of the first model layer and the lifting height of the printing platform.

[0141] In this embodiment, the method of controlling the moving mechanism to drive the first moving side of the trough to move downward includes controlling the moving mechanism to drive the first moving side of the trough to move downward for a fifth preset time length or a third preset height, or controlling the moving mechanism to drive the first moving side of the trough to move downward from a first position to a second position. The first position may be the preset reset position mentioned in the above embodiment, or the position of the trough when the bottom surface of the trough is parallel to the printing platform.

[0142] By controlling the time, height or position of the trough, the first moving side of the trough is moved downward into position, thereby achieving fast and successful release.

[0143] In one embodiment, the required moving distance and moving speed of the first moving side of the trough can be stored in the slice file. After the moving amplitude is obtained, the moving time, that is, the fifth preset time length, is calculated according to the moving distance and the moving speed of the first moving side of the trough, and then the first moving side of the trough is controlled to move downward to achieve release according to the fifth preset time length. Alternatively, the fifth preset time length can be directly stored in the slice file, and then the first moving side of the trough is controlled to move downward to achieve release according to the fifth preset time length, without the need for calculation, thereby improving the release efficiency.

[0144] In another embodiment, the total release height of the first model layer (e.g., the minimum required release height) and the lifting height of the printing platform can be stored in the slice file. After obtaining these two height values, the difference between the total release height of the first model layer and the lifting height of the printing platform is calculated to obtain the third preset height, that is, the moving distance of the first moving side of the trough, and then the first moving side of the trough is controlled to tilt downward according to the third preset height to achieve release. Alternatively, the third preset height can be directly stored in the slice file, and then the first moving side of the trough is controlled to tilt downward according to the third preset height to achieve release, without the need for calculation, thereby improving the release efficiency.

[0145] In one embodiment of the present application, the method further includes: controlling the moving mechanism to move the first moving side of the material trough downward according to the first speed, and during the printing process of at least part of the model layer of the model to be printed, the first speed is negatively correlated with the size of the model layer area of ​​the current model layer, and / or the first speed is negatively correlated with the lifting height of the printing platform corresponding to the current model layer.

[0146] In this embodiment, during the printing process, the first speed is determined according to the model layer area of ​​the current model layer and / or the lifting height of the printing platform corresponding to the current model layer, so as to control the moving mechanism to drive the first moving side of the trough to move downward according to the first speed. In one embodiment, the first model layer is the current model layer.

[0147] The first speed is negatively correlated with the size of the model layer area of ​​the current model layer, that is, the larger the model layer area, the smaller the first speed. The larger the model layer area, the slower the speed of separation of the release film of the trough from the model layer should be, so that the release process is more stable and the release success rate is ensured.

[0148] In order to ensure that the release process is more stable and reduce the probability of the release film sticking to the model layer, the moving speed of the first moving side of the trough moving downward can be reduced. However, in order to avoid too slow release, the time for the first moving side of the trough to move downward needs to match the lifting time of the printing platform, that is, the process of the first moving side of the trough moving downward is completed within the lifting time of the printing platform. The higher the lifting height of the printing platform, the longer the corresponding lifting time will be. When the moving distance of the first moving side of the trough is fixed, in order to match the lifting time of the printing platform with the time when the first moving side of the trough moves downward, in another embodiment of the present application, the speed at which the first moving side of the trough moves downward is slower, thereby extending the time for the first moving side of the trough to move downward, so as to match the lifting time of the printing platform. Therefore, the first speed is set to be negatively correlated with the lifting height of the printing platform corresponding to the current model layer, that is, the higher the lifting height of the printing platform corresponding to the model layer, the smaller the first speed of the first moving side of the trough, so that the time for the first moving side of the trough to move downward matches the lifting time of the printing platform, avoiding too fast or too slow release, ensuring stable printing while taking into account printing efficiency.

[0149] In this embodiment, the downward moving speed of the first moving side of the material trough is determined according to the model layer area of ​​the current model layer or the lifting height of the printing platform corresponding to the current model layer, so that the downward moving speed of the first moving side of the material trough is more consistent with the release of the current model layer, thereby ensuring the release effect.

[0150] In one embodiment of the present application, the method further includes: determining a moving speed according to a model layer area of ​​a model layer of a model to be printed and / or a lifting height of a printing platform corresponding to the model layer of the model to be printed, and then controlling the first moving side of the trough to move downward at the moving speed; wherein:

[0151] The area of ​​the first model layer is used as the model layer area; or, the model layer area is determined according to the area of ​​the first model layer and the areas of one or more model layers printed before the first model layer; or, the model layer area is determined according to the areas of one or more model layers of the printed model; wherein, when the model layer area is determined according to the areas of multiple model layers, the model layer area is the average or median of the areas of the multiple model layers; and / or,

[0152] The lifting height of the printing platform corresponding to the release of the first model layer is used as the lifting height of the printing platform; or, the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of the first model layer and the lifting height of the printing platform corresponding to one or more model layers printed before the first model layer; or, the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of one or more model layers of the printed model; wherein, when the lifting height of the printing platform is determined according to the lifting heights of the printing platform corresponding to the release of multiple model layers, the lifting height of the printing platform is the average or median of the lifting heights of the printing platform corresponding to the release of multiple model layers.

[0153] In one embodiment, when the model layer is released, the speed at which the first moving side of the trough moves downward can be determined according to the model layer area of ​​the model layer of the model to be printed. The area of ​​the first model layer can be used as the model layer area to determine the speed at which the first moving side of the trough moves downward, that is, the downward speed of the first moving side is determined according to the model layer area of ​​the current model layer; the area of ​​the first model layer and the area of ​​one or more model layers printed before the first model layer can be obtained, and the average or median of these areas can be used as the model layer area to determine the downward speed of the first moving side of the trough; the area of ​​one or more model layers printed before the first model layer can be obtained, and the average or median of these areas can be used as the model layer area to determine the downward speed of the first moving side of the trough.

[0154] The area of ​​one or more model layers printed before the first model layer can be obtained in the slice file, or can be determined after the model layer is printed. The area of ​​the first model layer can be obtained in the slice file.

[0155] The area of ​​one or more model layers of the printed model may also be obtained, and the average or median value of these areas may be used as the model layer area to determine the downward movement speed of the first moving side of the trough. The area of ​​one or more model layers of the printed model may be obtained in the slice file.

[0156] In another embodiment, when the model layer is released, the downward movement speed of the first moving side of the trough can be determined according to the lifting height of the printing platform corresponding to the model layer of the model to be printed (that is, the target lifting height). The lifting height of the printing platform corresponding to the first model layer can be used as the target lifting height, that is, the downward movement speed of the first moving side can be determined according to the lifting height of the printing platform corresponding to the current model layer; the lifting height of the printing platform corresponding to the first model layer and the lifting height of the printing platform corresponding to one or more model layers printed before the first model layer can also be obtained, and the average or median value of these lifting heights can be used as the target lifting height; the lifting height of the printing platform corresponding to one or more model layers printed before the first model layer can also be obtained, and the average or median value of these lifting heights can be used as the target lifting height.

[0157] The lifting height of the printing platform corresponding to one or more model layers printed before the first model layer can be obtained in the slicing file, or can be determined after the model layer is printed. The lifting height of the printing platform corresponding to the first model layer can be obtained in the slicing file.

[0158] The lifting height of the printing platform corresponding to one or more model layers of the printed model may also be obtained, and the average or median value of these lifting heights may be used as the target lifting height. The lifting height of the printing platform corresponding to one or more model layers of the printed model may be obtained in the slice file.

[0159] By determining the downward moving speed of the first moving side of the material trough according to the area of ​​the first model layer or the lifting height of the printing platform corresponding to the first model layer, the downward moving speed of the first moving side of the material trough is more consistent with the release of the current model layer, thereby ensuring the release effect.

[0160] By determining the downward moving speed of the first moving side of the trough according to the area of ​​one or more model layers printed before the first model layer or the lifting height of the printing platform corresponding to the model layer, or the lifting height of the printing platform corresponding to one or more model layers of the printed model obtained in the slicing file, it can be ensured that each model layer uses the model layer area or the target lifting height of the printing platform determined before printing the model layer to control the downward moving speed of the first moving side of the trough, and will not change multiple times, thereby ensuring the stability of printing.

[0161] In one embodiment of the present application, the method further includes: obtaining a moving speed set by a user, or obtaining a moving speed set corresponding to a model layer in a slicing file of a model to be printed; and controlling the first moving side of the trough to move downward at the moving speed.

[0162] In this embodiment, the moving speed of the first moving side of the material trough moving downward can be set by the user on the light-curing printing device, or can be stored in a slicing file, and the light-curing printing device obtains it from the slicing file during printing.

[0163] The downward moving speed of the first moving side of the trough is obtained in different ways, which improves the flexibility of obtaining the moving speed and can meet different printing scenarios.

[0164] In one embodiment of the present application, controlling the moving mechanism to drive the first moving side of the trough to move downward includes:

[0165] Control the moving mechanism to drive the first moving side of the trough to move downward at a constant speed or at a variable speed;

[0166] When the first moving side of the trough changes speed and moves downward, the first moving side is first controlled to move downward at the second speed and then at the third speed, or the first moving side is first controlled to move downward at the fourth speed and then at the fifth speed, or the first moving side is first controlled to move downward at the sixth speed and then at the seventh speed and then at the eighth speed, or the first moving side is first controlled to move downward at the ninth speed and then at the tenth speed and then at the eleventh speed;

[0167] Among them, the second speed is greater than the third speed, the fourth speed is less than the fifth speed, the sixth speed is greater than the seventh speed and the seventh speed is greater than the eighth speed, the ninth speed is less than the tenth speed and the tenth speed is less than the eleventh speed.

[0168] In this embodiment, the downward movement of the first moving side of the trough can be performed at a uniform speed to ensure the stability of the release and improve the printing success rate.

[0169] The process of the first moving side of the trough moving downward can also be a variable speed movement. The variable speed movement includes controlling the first moving side to move downward at the second speed and then controlling the first moving side to move downward at the third speed, or first controlling the first moving side to move downward at the fourth speed and then controlling the first moving side to move downward at the fifth speed, or first controlling the first moving side to move downward at the sixth speed and then controlling the first moving side to move downward at the seventh speed and then controlling the first moving side to move downward at the eighth speed, or first controlling the first moving side to move downward at the ninth speed and then controlling the first moving side to move downward at the tenth speed and then controlling the first moving side to move downward at the eleventh speed. Among them, the second speed is greater than the third speed, the fourth speed is less than the fifth speed, the sixth speed is greater than the seventh speed and the seventh speed is greater than the eighth speed, the ninth speed is less than the tenth speed and the tenth speed is less than the eleventh speed. Through variable speed movement, while ensuring the stability of the release, the release speed can also be increased.

[0170] In one embodiment of the present application, the method further includes: when the first moving side of the trough changes speed and moves downward, determining the speed switching node according to the height, time or downward position of the first moving side of the trough.

[0171] In this embodiment, when the first moving side of the trough changes speed and moves downward, the speed switching node can be determined according to the downward tilt height of the first moving side of the trough (i.e., the distance moved downward), the duration of the downward movement, or the position to which it moves downward, so as to achieve accurate speed change.

[0172] For example, the first moving side is first controlled to move downward at the fourth speed and then at the fifth speed, the fourth speed is less than the fifth speed, and the speed switching node may be when the first moving side of the trough is at the maximum moving distance, or when the corresponding limit of the maximum moving distance is reached. In this way, the model can be peeled off at a relatively stable and low speed, thereby avoiding the printing failure caused by violent peeling. At the same time, in the second half of the stroke of the first moving side resetting (i.e., the stroke of the first moving side returning from the corresponding position of the maximum moving distance to the original position where the separation starts), the resetting speed is increased, thereby increasing the printing speed while ensuring the printing success rate.

[0173] For example, the first moving side is first controlled to move downward at the ninth speed, then at the tenth speed, and then at the eleventh speed, the ninth speed is less than the tenth speed and the tenth speed is less than the eleventh speed, the first node of the speed switch is when the first moving side of the trough is located before the maximum moving distance, and the first node of the speed switch is when the first moving side of the trough is located after the maximum moving distance. In this way, the model peeling can be achieved at a relatively stable and low speed in the first stage, thereby avoiding the printing failure caused by the violent peeling phenomenon, and in the second section of the first moving side reset (between the first speed switching node and the second speed switching node), the reset speed can be increased, thereby increasing the printing speed while ensuring the printing success rate, and in the third section of the first moving side reset, the first moving side is controlled to return to the reset point slowly, which can avoid the disturbance caused by the rapid fluctuation driven by the first moving side and the trough, can reduce the time for the resin to flow and replenish the position to be printed, improve the printing speed, and prevent the violent collision caused by the rapid reset, thereby extending the life of the machine.

[0174] In one embodiment of the present application, the moving mechanism includes a driving device and a cam, and the cam is connected to the first moving side of the trough; controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough includes:

[0175] The control driving device drives the cam to rotate, so as to drive the first moving side of the trough to move downward, so as to tilt the trough, wherein the moving speed of the first moving side of the trough moving downward is controlled by controlling the rotation speed of the cam.

[0176] In this embodiment, the moving mechanism includes a driving device and a displacement structure. The displacement structure can be a cam. The cam is connected to the first moving side of the trough. The driving device drives the cam to move the first moving side of the trough downward to tilt the trough. When the trough returns to reset, the driving device drives the cam to move the first moving side of the trough upward to make the trough reach a preset reset position or make the bottom surface of the trough parallel to the printing platform. The moving speed of the first moving side of the trough is controlled by controlling the rotation speed of the cam driven by the driving device.

[0177] In one embodiment, the cam rotates one circle to realize the process of the first moving side of the trough moving downward and then returning to reset. The first half circle of the cam rotates for the first moving side of the trough to move downward to the position, and the second half circle of the cam rotates for the first moving side of the trough to return to reset to the position. In this case, the first half circle or the second half circle of the cam can be uniform or variable speed, and the variable speed method may include: controlling the first moving side to move downward at the second speed and then controlling the first moving side to move downward at the third speed, or first controlling the first moving side to move downward at the fourth speed and then controlling the first moving side to move downward at the fifth speed, or first controlling the first moving side to move downward at the sixth speed and then controlling the first moving side to move downward at the seventh speed and then controlling the first moving side to move downward at the eighth speed, or first controlling the first moving side to move downward at the ninth speed and then controlling the first moving side to move downward at the tenth speed and then controlling the first moving side to move downward at the eleventh speed. Among them, the second speed is greater than the third speed, the fourth speed is less than the fifth speed, the sixth speed is greater than the seventh speed and the seventh speed is greater than the eighth speed, the ninth speed is less than the tenth speed and the tenth speed is less than the eleventh speed.

[0178] In another embodiment of the present application, the displacement structure is one of a cylinder and a screw. The displacement structure rotates at least two circles to realize the process of the first moving side of the trough moving downward and then returning to reset. For example, the displacement structure rotates n circles to realize the process of the first moving side of the trough moving downward and then returning to reset, n is an integer greater than 1, and the first n / 2 circles of the displacement structure are the first moving side of the trough moving downward to the position, and the n / 2 circles of the displacement structure are the first moving side of the trough returning to reset. In this case, the displacement structure can rotate one circle at a uniform speed or variable speed, and the speed change method may include: controlling the first moving side to move downward at the second speed and then controlling the first moving side to move downward at the third speed, or first controlling the first moving side to move downward at the fourth speed and then controlling the first moving side to move downward at the fifth speed, or first controlling the first moving side to move downward at the sixth speed and then controlling the first moving side to move downward at the seventh speed and then controlling the first moving side to move downward at the eighth speed, or first controlling the first moving side to move downward at the ninth speed and then controlling the first moving side to move downward at the tenth speed and then controlling the first moving side to move downward at the eleventh speed. Among them, the second speed is greater than the third speed, the fourth speed is less than the fifth speed, the sixth speed is greater than the seventh speed and the seventh speed is greater than the eighth speed, the ninth speed is less than the tenth speed and the tenth speed is less than the eleventh speed.

[0179] In one embodiment of the present application, the material trough includes two long sides and two short sides, the first movable side is one of the long sides, and the opposite side of the first movable side is the other long side.

[0180] In this embodiment, the trough includes two long sides and two short sides, the first movable side is one of the long sides, and the opposite side of the first movable side is the other long side. In other words, the first movable side is one side of the trough along the length direction, and the opposite side of the first movable side is the other side of the trough along the length direction. Thus, under the premise of the same inclination angle, a smaller moving distance of the first movable side can be achieved. The same inclination angle can ensure that the inclination angle of the trough is sufficient to be relatively inclined with the surface of the printing platform to achieve inclined release that can improve the printing success rate. The smaller moving distance of the first movable side can shorten the overall moving time of the first movable side, so that the upper limit of the printing speed of the device can be increased. Furthermore, due to the rectangular shape limitations of the long and short sides of the material trough, the model itself is likely to have a longer physical diameter on the long side of the material trough, and the model itself is likely to have a shorter physical diameter on the short side of the material trough. The first movable side is one side of the material trough along the length direction, which can enable the inclined peeling and release of the model to be carried out along the short side of the material trough, and can avoid having an excessively long peeling stroke for the peeling and release of the model layer when printing a model similar to full-screen exposure, thereby increasing the printing speed and the printing success rate.

[0181] In one embodiment of the present application, the material trough includes two long sides and two short sides, the first movable side is one of the short sides, and the opposite side of the first movable side is the other short side.

[0182] In this way, under the premise of the same inclination angle, a larger moving distance of the first moving side can be achieved, thereby achieving a larger first moving distance, a larger second moving distance and a larger third moving distance, so that the minimum required lifting height of the printing platform can be reduced while the minimum required height for release remains unchanged, so as to facilitate the printing of a model with a smaller layer thickness while realizing a continuous molding printing method. The minimum required lifting height of the printing platform can be the model layer thickness, or it can be higher than the model layer thickness, or it can be lower than the model layer thickness; the minimum required lifting height of the printing platform can be the actual lifting height of the printing platform, or it can be less than the actual lifting height of the printing platform, so as to ensure successful release.

[0183] In one embodiment of the present application, the trough includes a first moving side and a second side opposite to the first moving side, wherein:

[0184] The second side of the material trough is a fixed side, and the second side of the material trough is hinged to the inner side of the upper bottom plate of the light-curing printing device; or

[0185] The second side of the trough is a movable side, and a fixed end is further included between the first movable side and the second side of the trough, and the trough is movably connected to the upper bottom plate through the fixed end, and the distance between the first movable side and the fixed end is greater than the distance between the second side and the fixed end. The specific method of the movable connection can be a hinge connection, a rotating shaft connection, etc.

[0186] In this embodiment, if Figure 2 and Figure 3 As shown, the trough 201 includes a first moving side 211 and a second side 212 opposite to the first moving side 211 .

[0187] In one embodiment, Figure 2 As shown, the second side 212 of the material trough 201 is a fixed side, and the second side 212 of the material trough 201 is hinged to the inner side of the upper bottom plate 203 of the light-curing printing device. The first movable side 211 of the material trough 201 moves downward and upward relative to the printing platform 202 of the light-curing printing device. When the model layer is released, the first movable side 211 of the material trough 201 moves downward to tilt the material trough 201 and lift the printing platform 202 to achieve rapid release of the model layer. The upper bottom plate 203 of the light-curing printing device can be located on the base of the light-curing printing device. A light source can be arranged in the base of the light-curing printing device. A printing component can be arranged above the base of the light-curing printing device, and the printing component can include a printing platform driving mechanism and a printing platform.

[0188] In another embodiment, if Figure 3 As shown, the second side 212 of the trough 201 is a movable side, and a fixed end 213 is further included between the first movable side 211 and the second side 212 of the trough 201. The trough 201 is movably connected to the upper base plate 203 through the fixed end 213, and the specific method of the movably connected connection may be a hinge, a rotating shaft connection, etc. The first movable side 211 and the second side 212 of the trough 201 move downward and upward relative to the printing platform 202 of the light-curing printing device. When the first movable side 211 moves downward, the second side 212 moves upward; when the second side 212 moves downward, the first movable side 211 moves upward. When the model layer is released, the first movable side 211 of the trough 201 moves downward to tilt the trough 201, and the printing platform 202 is lifted to achieve rapid release of the model layer.

[0189] Among them, the distance between the first movable side 211 and the fixed end 213 is greater than the distance between the second side 212 and the fixed end 213, which can achieve a larger moving distance of the first movable side 211 under the premise of the same inclination angle, thereby increasing the upper limit of the printing speed of the device.

[0190] The present application embodiment provides a three-dimensional model slicing method, which is applied to generate a slicing file for a light-curing printing device to print a model, such as Figure 4 As shown, the method includes:

[0191] Step 401, obtaining three-dimensional data of a model to be printed;

[0192] Step 402, determining the placement position of the model to be printed on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device;

[0193] Step 403, slicing the model to be printed, generating a model layer obtained by slicing the model to be printed, and determining the minimum required release height corresponding to the model layer;

[0194] Step 404, obtaining a slice file according to the model layer and the minimum required height for release.

[0195] In this embodiment, the three-dimensional data of the model to be printed is obtained, and the placement position of the model to be printed on the printing platform of the photocuring printing device or on the material tank of the photocuring printing device is determined according to the three-dimensional data. The model to be printed is sliced ​​to generate model layers of the model to be printed, and the minimum required release height corresponding to each model layer is determined, and the model layer and its corresponding minimum required release height are placed in a slice file. Among them, the minimum required release height refers to the minimum release height that can ensure the smooth release of the model layer.

[0196] When the photocuring printing device prints the model to be printed, the slice file is provided to the photocuring printing device so that the photocuring printing device prints according to the slice file. According to the minimum required height for release in the slice file, the first moving side of the material trough is controlled to move downward, and the lifting of the printing platform is controlled to achieve the release of the model layer. By controlling the first moving side of the material trough to move downward and controlling the lifting of the printing platform when the model layer is released, the release in both the downward and upward directions is achieved, thereby improving the success rate of the model release and the speed of the model release.

[0197] In one embodiment of the present application, a slice file is obtained according to the model layer and the minimum required release height, including:

[0198] The minimum required release height is used as a model layer association parameter to obtain a slice file; and / or,

[0199] Get the slice file according to the model layer and the minimum required height for separation, including:

[0200] Determine the target release distance according to the difference between the minimum required release height and the model layer thickness of the model layer;

[0201] Determining a movable distance of a printing area of ​​a material tank of the photocurable printing device close to the first movable side according to a device type of the photocurable printing device;

[0202] If the movable distance is less than the target release distance, the model to be printed is set to be printed in the first printing mode in the slice file, where the first printing mode is a printing mode in which the printing position corresponding to the first model layer of the model to be printed is lower than the position to which the printing platform is lifted during the printing of the second model layer of the model to be printed, and the second model layer is the previous model layer of the first model layer;

[0203] If the movable distance is greater than or equal to the target release distance, the model to be printed is set to be printed in the second printing mode in the slicing file; the second printing mode is a printing mode in which the printing position corresponding to the first model layer of the model to be printed is higher than or equal to the position to which the printing platform is lifted during the printing process of the second model layer of the model to be printed, and the second model layer is the previous model layer of the first model layer.

[0204] In one embodiment, the minimum required release height is used as a model layer associated parameter to obtain a slice file, so that the light-curing printing device controls the release of the model layer according to the minimum required release height.

[0205] In another embodiment, the target release distance is determined according to the difference between the minimum required release height and the model layer thickness of the model layer. The movable distance of the printing area of ​​the material trough of the photocuring printing device close to the first moving side is determined according to the device type of the photocuring printing device. Among them, the target release distance can be obtained by subtracting the model layer thickness of the model layer from the minimum required release height. The concept of the target release distance is essentially the concept obtained by the release lifting height of the printing platform except the layer thickness height that must be lifted + the first moving distance of the corresponding position of the model layer. The movable distance of the printing area of ​​the material trough of the photocuring printing device close to the first moving side can be the maximum movable distance of the printing area of ​​the material trough of the photocuring printing device close to the first moving side. The maximum movable distance can be determined by the mechanical structure of the material trough of the photocuring printing device and the related moving mechanism for realizing inclined release. Different models of photocuring printing devices can have the same or different maximum movable distances.

[0206] If the movable distance is less than the target release distance, the first printing mode is set in the slice file to print the model to be printed. The first printing mode is a printing mode in which the printing position corresponding to the first model layer of the model to be printed is lower than the position to which the printing platform is lifted during the printing of the second model layer of the model to be printed. Among them, the second model layer is the previous model layer of the first model layer. In terms of printing time, the second model layer is a model layer printed earlier than the first model layer. In other words, the position to which the printing platform is lifted during the printing of the second model layer is higher than the printing position corresponding to the first model layer. When printing the first model layer, it is necessary to control the printing platform from the position to which the printing platform is lifted during the printing of the second model layer to the printing position of the first model layer, so as to realize non-continuous molding printing.

[0207] If the movable distance is greater than or equal to the target release distance, the second printing mode is set in the slice file to print the model to be printed. The second printing mode is a printing mode in which the printing position corresponding to the first model layer of the model to be printed is higher than or equal to the position to which the printing platform is lifted during the printing of the second model layer of the model to be printed. In other words, the position to which the printing platform is lifted during the printing of the second model layer is lower than or equal to the printing position corresponding to the first model layer. When preparing to print the first model layer, the printing platform is controlled to move up or remain so that the printing platform is located above or equal to the position to which the printing platform is lifted during the printing of the second model layer. During the printing of the second model layer, the printing platform will not be lifted too high, and there will be no action of controlling the printing platform to descend when preparing to print the first model layer. Since the lifting height of the printing platform will not be too high during the entire printing process of the model to be printed, the effect of continuous molding printing can be achieved.

[0208] In one embodiment of the present application, determining the placement position of the model to be printed on a printing platform of a photocuring printing device or on a material tank of the photocuring printing device includes:

[0209] Determine the target release distance according to the difference between the minimum required release height and the model layer thickness of the model layer;

[0210] Determining a movable distance of a printing area of ​​a material tank of the photocurable printing device close to the first movable side according to a device type of the photocurable printing device;

[0211] If the movable distance is greater than or equal to the target release distance, the placement position of the model to be printed on the material tank of the light-curing printing device is obtained;

[0212] Determining, according to the placement position of the model to be printed on the material slot of the light-curing printing device, the corresponding moving distance of each printing position of the model to be printed when the first moving side is in the state of the maximum moving distance;

[0213] If the corresponding moving distances of each printing position of the model to be printed are greater than or equal to the target release distance, slicing is performed;

[0214] If the corresponding moving distance of at least part of the printing position of the model to be printed is less than the target release distance, the placement position of the model to be printed on the material trough of the light-curing printing device is moved so that when the first moving side is in the state of maximum moving distance, the corresponding moving distance of each printing position of the model to be printed is greater than or equal to the target release distance, and then slicing is performed.

[0215] In this embodiment, the target release distance is determined according to the difference between the minimum required release height and the model layer thickness of the model layer. The movable distance of the printing area of ​​the material slot of the photocuring printing device close to the first movable side is determined according to the device type of the photocuring printing device.

[0216] If the movable distance is greater than or equal to the target release distance, the placement position of the model to be printed on the material trough of the light-curing printing device is obtained. This step can be omitted. If this step is omitted, when the movable distance is less than the target release distance, the corresponding moving distances of each printing position of the model to be printed when the first moving side is in the state of the maximum moving distance can be directly determined according to the placement position of the model to be printed on the material trough of the light-curing printing device, thereby adjusting the placement position of the model, and finally achieving successful printing or improving the printing success rate through the adjustment of the placement position of the model.

[0217] According to the placement position of the model to be printed on the material tank of the light-curing printing device, the corresponding moving distance of each printing position of the model to be printed is determined when the first moving side is in the state of maximum moving distance. The corresponding moving distance of each printing position is compared with the target release distance. If the corresponding moving distance of each printing position of the model to be printed is greater than or equal to the target release distance, the effect of continuous molding printing can be achieved during printing, so as to perform slicing processing. The state of the first moving side being the maximum moving distance can be the state in which the moving distance of the first moving side reaches the maximum value of the movable distance of the printing area of ​​the material tank of the light-curing printing device close to the first moving side.

[0218] If the corresponding moving distance of at least part of the printing position of the model to be printed is less than the target release distance, the placement position of the model to be printed on the material trough of the light-curing printing device is moved so that when the first moving side is in the state of maximum moving distance, the corresponding moving distance of each printing position of the model to be printed is greater than or equal to the target release distance, ensuring that the effect of continuous molding printing can be achieved during printing, thereby performing slicing processing.

[0219] In one embodiment of the present application, a slice file is obtained according to the model layer and the minimum required release height, including:

[0220] Generate an inclined release printable mark, which indicates that the slice file can be normally printed on the corresponding light-curing printing device;

[0221] Place the tilted release printable logo into the slice file.

[0222] In this embodiment, an inclined release printable mark is generated, and the inclined release printable mark is used to indicate that the slicing file can be normally printed on the corresponding light-curing printing device. In one embodiment, the inclined release printable mark indicates whether the slicing file is a slicing file specially customized for the printing device adapted to the inclined release, and the minimum required height for release can be determined by the mark. Specifically, when the slicing file does not carry the mark, it indicates that the minimum required height for release is not stored in the slicing file, and the minimum required height for release is determined according to the release height of each model layer in the slicing file; when the slicing file carries the mark, it indicates that the minimum required height for release is stored in the slicing file, and the minimum required height for release is determined according to the minimum required height for release of each model layer in the slicing file. The slicing file is identified by placing the inclined release printable mark into the slicing file.

[0223] In one embodiment of the present application, determining the placement position of the model to be printed on a printing platform of a photocuring printing device or on a material tank of the photocuring printing device includes:

[0224] Determine one or more optimal printing starting points in a printing area of ​​a material tank of the light-curing printing device according to a device type of the light-curing printing device;

[0225] Determine a point on the first moving side of the material slot of the to-be-printed model closest to the light-curing printing device as a target point;

[0226] Move the placement position of the model to be printed on the trough so that the target point coincides with at least one optimal printing starting point;

[0227] The distance between the optimal printing starting point and the first moving side is less than the third preset distance; or the distance between the optimal printing starting point and the opposite side of the first moving side is greater than the third preset distance; or the percentage of the distance between the optimal printing starting point and the first moving side in the distance between the first moving side of the material slot and the opposite side of the first moving side of the material slot is less than the third preset percentage, and the third preset percentage is any percentage from 90% to 0%; or the percentage of the distance between the optimal printing starting point and the opposite side of the first moving side in the distance between the first moving side of the material slot and the opposite side of the first moving side of the material slot is greater than the fourth preset percentage, and the third preset percentage is any percentage from 0% to 20%.

[0228] In this embodiment, one or more optimal printing starting points in the printing area of ​​the material slot of the photocuring printing device are determined according to the device type of the photocuring printing device. For example, the optimal printing starting point in the printing area of ​​the material slot can be determined according to the contour of the model, the shape of the model, the area size of the model layer, whether it exceeds the limit of the printing area after moving, etc. It can also be determined according to the seldom-used printing area of ​​the device to increase the frequency of use of the seldom-used printing area of ​​the device. The seldom-used printing area refers to an area with a low frequency of use, so as to avoid the problem of reduced life of the release film caused by long-term printing in one area. The optimal printing starting point in the printing area of ​​the material slot can be one or more.

[0229] In order to achieve higher precision photocuring printing and avoid jagged edges on the model, the printed model usually pursues a smaller model layer thickness. However, if the model layer thickness is too small, it will affect the realization of the inequality "the moving distance of the first moving side of the trough moving downward + the model layer thickness of the first model layer ≧ the total release height of the first model layer". In order to make this inequality valid, it is necessary to rely on the moving distance of the first moving side of the trough moving downward. In one embodiment of the present application, the moving distance of the first moving side of the trough moving downward can be ensured to be larger by controlling the molding position of the model to be printed on the trough to be closer to the first moving side of the trough. Therefore, in the embodiment of the present application, the point of the first moving side of the trough of the model to be printed closest to the photocuring printing device is determined as the target point, and the placement position of the model to be printed on the trough is moved so that the target point coincides with at least one optimal printing starting point, so that the molding position of the printed model on the trough is closer to the first moving side of the trough, which is more conducive to achieving a larger moving distance of the first moving side of the trough.

[0230] In an embodiment of the present application, the distance between the optimal printing starting point and the first moving side is less than the third preset distance; or the distance between the optimal printing starting point and the opposite side of the first moving side is greater than the third preset distance; or the percentage of the distance between the optimal printing starting point and the first moving side in the distance between the first moving side of the material slot and the opposite side of the first moving side of the material slot is less than the third preset percentage, and the third preset percentage is any percentage from 90% to 0%; or the percentage of the distance between the optimal printing starting point and the opposite side of the first moving side in the distance between the first moving side of the material slot and the opposite side of the first moving side of the material slot is greater than the fourth preset percentage, and the third preset percentage is any percentage from 0% to 20%.

[0231] Through the above method, the molding position corresponding to the printed model on the material trough is closer to the first moving side of the material trough, which is more conducive to achieving a larger moving distance of the first moving side of the material trough.

[0232] In one embodiment of the present application, a slice file is obtained according to the model layer and the minimum required release height, including:

[0233] Determine the platform lifting time according to the lifting speed of the printing platform of the light-curing printing device and the model layer thickness of the model layer;

[0234] Determining a moving speed of the first moving side according to a moving distance of the first moving side of the trough corresponding to the model layer and a platform lifting time;

[0235] The moving speed of the first moving side is associated with the corresponding model layer and put into the slice file.

[0236] In order to ensure a more stable release process and reduce the probability of the release film sticking to the model layer, the downward moving speed of the first moving side of the material trough can be reduced. However, in order to avoid too slow release, the downward moving time of the first moving side of the material trough needs to match the lifting time of the printing platform, that is, the downward moving process of the first moving side of the material trough is completed within the lifting time of the printing platform.

[0237] In this embodiment, the platform lifting time is determined according to the lifting speed of the printing platform of the photocuring printing device and the model layer thickness of the model layer. Specifically, the model layer thickness of the model layer can be used as the total lifting height of the printing platform, and then the lifting time of the printing platform is determined according to the total lifting height of the printing platform and the lifting speed of the printing platform. Alternatively, the total lifting height of the printing platform is determined according to the lifting speed of the printing platform of the photocuring printing device, the model layer thickness of the model layer, and the lifting height other than the layer thickness lifted by the printing platform, and then the lifting time of the printing platform is determined according to the total lifting height of the printing platform and the lifting speed of the printing platform. The moving distance of the first moving side corresponding to the model layer is determined, wherein the moving distance of the first moving side may be different for different model layers. According to the moving distance of the first moving side and the platform lifting time, the moving speed of the first moving side is calculated, and the moving speed of the first moving side is associated with the corresponding model layer and put into the slice file. In one embodiment, the moving speed of the first moving side can be directly associated with the corresponding model layer and put into the slice file, or the rotation speed of the moving mechanism for controlling the moving speed of the first moving side can be associated with the corresponding model layer and put into the slice file.

[0238] Through the above method, the downward movement time of the first moving side of the material trough is matched with the lifting time of the printing platform, so as to avoid too fast or too slow release, ensure stable printing and take into account printing efficiency.

[0239] The present application also provides a light-curing printing device, including:

[0240] A material trough, used to hold printing materials;

[0241] The printing platform is located above the material trough and is used to carry the printed model;

[0242] A light source, located below the trough, for emitting curing light;

[0243] A moving mechanism, used for driving the first moving side of the trough to move downward or upward;

[0244] Memory, the memory stores programs or instructions;

[0245] The processor implements the various steps of the above-mentioned release control method embodiment of the light-curing printing device when executing the program or instruction, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0246] In one embodiment of the present application, the light-curing printing device further includes:

[0247] An upper bottom plate, the upper bottom plate is provided with a slot for placing a feed trough;

[0248] The moving mechanism includes a driving device and a displacement structure. The displacement structure is connected to the first moving side of the trough. The driving device drives the displacement structure to realize the movement of the first moving side of the trough. The displacement structure includes one of a cam, a cylinder and a screw.

[0249] In this embodiment, the photocuring printing device also includes an upper base plate, which is provided with a slot for placing a material supply trough; the moving mechanism includes a driving device and a displacement structure, the displacement structure is connected to the first moving side of the material trough, and the driving device drives the displacement structure to realize the movement of the first moving side of the material trough, that is, the first moving side is a side of the material trough that can move relative to the upper base plate, wherein the displacement structure includes one of a cam, a cylinder and a screw.

[0250] The moving mechanism drives the material trough to move downward to achieve inclined release, thereby improving the release speed and effect; the moving mechanism drives the material trough to move upward to achieve the return and reset of the material trough to ensure subsequent printing.

[0251] In one embodiment of the present application, the trough includes a first moving side and a second side opposite to the first moving side, wherein:

[0252] The second side of the trough is a fixed side, and the second side of the trough is hinged to the inner side of the upper bottom plate; or

[0253] The second side of the trough is a movable side, and a fixed end is further included between the first movable side and the second side of the trough, and the trough is movably connected to the upper bottom plate through the fixed end, and the distance between the first movable side and the fixed end is greater than the distance between the second side and the fixed end. The specific method of the movable connection can be a hinge connection, a rotating shaft connection, etc.

[0254] In this embodiment, if Figure 2 and Figure 3As shown, the trough 201 includes a first moving side 211 and a second side 212 opposite to the first moving side 211 .

[0255] In one embodiment, Figure 2 As shown, the second side 212 of the trough 201 is a fixed side, the second side 212 of the trough 201 is hinged to the inner side of the upper bottom plate 203 of the light-curing printing device, and the first movable side 211 of the trough 201 moves downward and upward relative to the printing platform 202 of the light-curing printing device. When the model layer is released, the first movable side 211 of the trough 201 moves downward to tilt the trough 201 and the printing platform 202 is lifted to achieve rapid release of the model layer.

[0256] In another embodiment, if Figure 3 As shown, the second side 212 of the trough 201 is a movable side, and a fixed end 213 is further included between the first movable side 211 and the second side 212 of the trough 201. The trough is movably connected to the upper base plate through the fixed end 213, and the specific method of the movable connection can be hinged, pivoted, etc. The first movable side 211 and the second side 212 of the trough 201 move downward and upward relative to the printing platform 202 of the photocuring printing device. When the first movable side 211 moves downward, the second side 212 moves upward; when the second side 212 moves downward, the first movable side 211 moves upward. When the model layer is released, the first movable side 211 of the trough 201 moves downward to tilt the trough 201, and the printing platform 202 is lifted to achieve rapid release of the model layer.

[0257] Among them, the distance between the first movable side 211 and the fixed end 213 is greater than the distance between the second side 212 and the fixed end 213, which can achieve a larger moving distance of the first movable side 211 under the premise of the same inclination angle, thereby increasing the upper limit of the printing speed of the device.

[0258] In one embodiment of the present application, the moving mechanism further includes:

[0259] A rotating middle plate, which is fixedly connected to the material trough;

[0260] The sensing component includes a sensor and a sensing sheet. The sensor is arranged on the upper base plate of the light-curing printing device, and the sensor is fixedly connected to the upper base plate. The sensing sheet is arranged on the rotating middle plate, and the sensing sheet is fixedly connected to the rotating middle plate. The sensing sheet and the sensor cooperate with each other to generate a sensing signal to indicate the current position of the first moving side of the material trough.

[0261] In this embodiment, the moving mechanism further includes a rotating middle plate, which is fixedly connected to the material trough. The moving mechanism further includes a sensing component, which is used to sense whether the bottom surface of the material trough is parallel to the printing platform or whether the material trough is returned to its original position. The sensing component includes a sensor and a sensing sheet, the sensor is arranged on the upper bottom plate, the sensing sheet is arranged on the rotating middle plate, and the sensing sheet and the sensor cooperate with each other to generate a sensing signal.

[0262] When the first movable side is located at a position where the bottom surface of the material trough is parallel to the printing platform, the sensing component sends a first sensing signal, and / or, when the first movable side is located at a preset reset position, the sensing component sends a second sensing signal; when the first movable side is located at other positions where the bottom surface of the material trough is not parallel to the printing platform, the sensing component sends a third sensing signal, and / or, when the first movable side is located at other positions deviating from the preset reset position, the sensing component sends a fourth sensing signal.

[0263] The sensing component can be used to detect whether the bottom surface of the trough is parallel to the printing platform or whether the trough has returned to its original position, so as to avoid the trough not returning to its original position after moving downward after the last printing is completed or the previous model layer is released, or to avoid the problem that the bottom surface of the trough is not parallel to the printing platform due to collision or other reasons, which affects the printing quality and accuracy.

[0264] An embodiment of the present application also provides a computer device, including a processor and a memory, wherein the memory stores programs or instructions running on the processor. When the programs or instructions are executed by the processor, the various steps of the above-mentioned three-dimensional model slicing method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they are not repeated here.

[0265] The memory of the photocurable printing device or computer device can be used to store software programs and various data. The memory may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory may include a volatile memory or a non-volatile memory, or the memory may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0266] The processor of the photocurable printing device or computer device may include one or more processing units; optionally, the processor integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to the operating system, user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor.

[0267] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, each step of the above-mentioned release control method embodiment of the photocuring printing device is implemented, or each step of the above-mentioned three-dimensional model slicing method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0268] The present application also provides the following embodiments:

[0269] Reference numeral 1, a release control method of a light-curing printing device, the light-curing printing device comprising a printing platform, a material tank, a light source and a moving mechanism, the method comprising:

[0270] Controlling the printing platform to be located at a printing position corresponding to a first model layer of the model to be printed, wherein the printing position corresponding to the first model layer is higher than or equal to a position to which the printing platform is lifted during the printing of a second model layer of the model to be printed, the second model layer being a previous model layer of the first model layer;

[0271] Control the light source to emit curing light to cure the printing material in the material tank to obtain the first model layer;

[0272] The moving mechanism is controlled to drive the first moving side of the material trough to move downward to tilt the material trough, and the printing platform is controlled to lift to achieve the release of the first model layer.

[0273] Reference numeral 2, based on reference numeral 1, the printing position corresponding to the first model layer is higher than or equal to the highest position to which the printing platform is lifted during the printing process of the second model layer of the model to be printed; and / or

[0274] The printing position corresponding to the first model layer is higher than or equal to the position to which the printing platform is lifted when the release process of the second model layer of the model to be printed is completed; and / or

[0275] The printing position corresponding to the first model layer is higher than or equal to any position to which the printing platform is lifted during the printing process of the second model layer of the model to be printed; and / or

[0276] The printing position corresponding to the first model layer is higher than or equal to the position to which the printing platform is lifted when printing of the second model layer of the model to be printed is completed.

[0277] Reference number 3, based on reference number 2, controlling the printing platform to be located at a printing position corresponding to the first model layer includes:

[0278] When the position to which the printing platform is lifted during printing of the second model layer is lower than the printing position corresponding to the first model layer, controlling the printing platform to move up to the printing position corresponding to the first model layer; or

[0279] When the position to which the printing platform is lifted during printing of the second model layer is level with the printing position corresponding to the first model layer, the printing platform is controlled to remain at the printing position corresponding to the first model layer.

[0280] Label 4, based on label 1, during the release process of the first model layer, the sum of the downward movement distance of the first moving side of the material trough and the model layer thickness of the first model layer is greater than or equal to the total release height of the first model layer.

[0281] Reference numeral 5, based on reference numeral 1, a corresponding position of at least one position of the first model layer in the material trough is determined as a first corresponding position, when the first movable side moves downward to a first set position, the first corresponding position moves downward by a first moving distance, and during the release process of the first model layer, the sum of the first moving distance and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer; and / or,

[0282] Determine a second corresponding position of the first model layer in the material trough, and determine a moving distance of a portion of the second corresponding position closest to the first moving side when it moves downward as a second moving distance, and during the release process of the first model layer, a sum of the second moving distance and the model layer thickness of the first model layer is greater than or equal to a minimum required release height of the first model layer; and / or

[0283] Determine a third corresponding position of the first model layer in the material trough, and determine a moving distance of a portion of the third corresponding position farthest from the first moving side downward as a third moving distance, and during the release process of the first model layer, a sum of the third moving distance and a model layer thickness of the first model layer is greater than or equal to a minimum required release height of the first model layer; and / or

[0284] During the release process of the first model layer, the sum of the downward movement distance of the opposite side of the first moving side of the material trough and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer.

[0285] Reference number 6, based on reference number 5, the method further includes:

[0286] Obtaining a slicing file, and if the obtained slicing file does not carry the first identifier, determining the minimum required release height of the first model layer according to the release height of the model layer in the slicing file; or,

[0287] Acquire a slicing file, and if the acquired slicing file carries a first identifier, determine the minimum required release height of the first model layer according to the minimum required release height of the model layer in the slicing file; or,

[0288] The minimum required release height of the first model layer is determined according to one or more of the area, exposure time, and exposure energy of the first model layer.

[0289] Label 7, based on label 1, the maximum distance or the minimum distance between the molding position of the model to be printed on the material trough corresponding to the first moving side of the material trough is determined as the first target distance, wherein the first target distance is less than or equal to the first preset distance, or the first target distance accounts for a percentage of the distance between the first moving side of the material trough and the opposite side of the first moving side of the material trough as the first target percentage; the method also includes: ensuring that the first target percentage is less than or equal to a first preset percentage, the first preset percentage is any percentage from 90% to 0%, and ensuring that the first target percentage is less than or equal to the first preset percentage includes: if the first target percentage is greater than the first preset percentage, modifying the exposure image of each model layer of the model to be printed to move the molding position of the model to be printed corresponding to the molding position on the material trough until the first target percentage is less than or equal to the first preset percentage; or

[0290] The maximum distance or the minimum distance between the molding position of the model to be printed on the material trough corresponding to the side opposite to the first moving side of the material trough is determined as the second target distance, wherein the second target distance is greater than or equal to the second preset distance, or the percentage of the second target distance in the distance between the first moving side of the material trough and the side opposite to the first moving side of the material trough is the second target percentage; the method also includes: ensuring that the second target percentage is greater than or equal to the second preset percentage, and the second preset percentage is any percentage from 0% to 20%; ensuring that the second target percentage is greater than or equal to the second preset percentage includes: if the second target percentage is less than the second preset percentage, modifying the exposure image of each model layer of the model to be printed to move the molding position of the model to be printed on the material trough corresponding to the second target percentage until the second target percentage is greater than or equal to the second preset percentage.

[0291] Reference number 8, based on reference number 1, before starting printing of the model to be printed, the method further includes:

[0292] If it is detected that the moving mechanism is in working mode, detecting whether the molding position of the to-be-printed model on the material trough corresponding to the molding position is within the first printing area, if so, executing the printing procedure normally, if not, adjusting the molding position of the to-be-printed model on the material trough to be within the first printing area;

[0293] If it is detected that the moving mechanism is in sleep mode, detecting whether the molding position of the to-be-printed model on the material trough corresponding to the molding position is in the second printing area, if so, executing the printing procedure normally, if not, adjusting the molding position of the to-be-printed model on the material trough to be in the second printing area;

[0294] Wherein, the second printing area includes the first printing area; or the second printing area includes a first sub-area and a second sub-area, the first sub-area overlaps with the first printing area, the second sub-area is located outside the first sub-area, and the second sub-area has no overlapping area with the first printing area.

[0295] Reference numeral 9, based on reference numeral 8, a method for adjusting the molding position of the to-be-printed model on the material trough includes:

[0296] Modify the exposure image of each model layer of the model to be printed to move the molding position of the model to be printed corresponding to the molding position on the material tank; or,

[0297] Adjusting the position of the model to be printed on the printing platform to adjust the molding position of the model to be printed on the material trough; or,

[0298] The position of the printing platform is adjusted to adjust the molding position of the model to be printed on the material trough.

[0299] Reference number 10, based on reference number 1, before starting printing of the model to be printed, the method further includes:

[0300] Moving the to-be-cured portion of the exposed image of at least a portion of the model layer of the to-be-printed model toward a position close to the first moving side of the material trough;

[0301] The to-be-cured portions of the exposed images of all the model layers of the to-be-printed model are moved toward a position close to the first moving side of the material trough.

[0302] Reference number 11, based on reference number 1, the method further includes:

[0303] After controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough, controlling the moving mechanism to drive the first moving side of the trough to move upward.

[0304] Reference number 12, based on reference number 1, the method further includes:

[0305] In response to a model printing instruction of the model to be printed or a start printing instruction of one layer of the model to be printed, a sensing signal of the sensing component of the moving mechanism is obtained, wherein when the first moving side is located at a position where the bottom surface of the material trough is parallel to the printing platform, the sensing component sends a first sensing signal, and / or, when the first moving side is located at a preset reset position, the sensing component sends a second sensing signal; when the first moving side is located at other positions where the bottom surface of the material trough is not parallel to the printing platform, the sensing component sends a third sensing signal, and / or, when the first moving side is located at other positions deviating from the preset reset position, the sensing component sends a fourth sensing signal;

[0306] If the first sensing signal and / or the second sensing signal is obtained, printing of the to-be-printed model is executed;

[0307] If the third sensing signal and / or the fourth sensing signal is obtained, the moving mechanism is controlled to drive the first moving side of the trough to move until the first sensing signal and / or the second sensing signal is obtained.

[0308] Reference number 13, based on reference number 12, the method further includes:

[0309] After the printing of the to-be-printed model is completed, the moving mechanism is controlled to drive the first moving side of the material trough to move until the first sensing signal and / or the second sensing signal is obtained.

[0310] Reference number 14, based on reference number 12 or 13, the method further includes:

[0311] During the printing process of the model to be printed, if the first sensing signal and / or the second sensing signal is not obtained within a first preset time period, printing is stopped and a warning signal is issued; and / or,

[0312] During the printing process of the to-be-printed model, if the third sensing signal and / or the fourth sensing signal is not obtained within a second preset time period, the printing is stopped and a warning signal is issued;

[0313] During the printing process of the model to be printed, if the first sensing signal and / or the second sensing signal are not obtained within a first preset time period, and / or the third sensing signal and / or the fourth sensing signal are not obtained within a second preset time period, the current of the driving device of the moving mechanism is obtained, and it is determined whether the driving device is abnormal based on the current.

[0314] Reference number 15, based on reference number 1, controlling the moving mechanism to drive the first moving side of the material trough to move downward, and controlling the printing platform to lift, includes:

[0315] Control the moving mechanism to drive the first moving side of the material trough to move downward, and control the printing platform to lift up; or,

[0316] Control the moving mechanism to drive the first moving side of the trough to move downward for a third preset time or a first preset height, or after moving downward to a first preset position, control the printing platform to be lifted and the first moving side of the trough to move downward; or,

[0317] The printing platform is controlled to be lifted for a fourth preset time period or a second preset height, or lifted to a second preset position, and then the moving mechanism is controlled to drive the first moving side of the material trough to move downward and lift the printing platform.

[0318] Reference number 16, based on reference number 1, controlling the moving mechanism to drive the first moving side of the trough to move downward includes:

[0319] Control the moving mechanism to drive the first moving side of the trough to move downward for a fifth preset time period; or,

[0320] Control the moving mechanism to drive the first moving side of the material trough to move downward to a third preset height, wherein the third preset height is equal to the difference between the release height of the first model layer and the lifting height of the printing platform; or,

[0321] The moving mechanism is controlled to drive the first moving side of the material trough to move downward from a first position to a second position, and the height difference between the first position and the second position is greater than or equal to the difference between the release height of the first model layer and the lifting height of the printing platform.

[0322] Reference number 17, based on reference number 1, the method further includes:

[0323] The moving mechanism is controlled according to the first speed to drive the first moving side of the material trough to move downward. During the printing process of at least part of the model layer of the model to be printed, the first speed is negatively correlated with the size of the model layer area of ​​the current model layer, and / or the first speed is negatively correlated with the lifting height of the printing platform corresponding to the current model layer.

[0324] Reference number 18, based on reference number 1, the method further includes:

[0325] Determine the moving speed according to the model layer area of ​​the model layer of the model to be printed and / or the lifting height of the printing platform corresponding to the model layer of the model to be printed, and then control the first moving side of the trough to move downward at the moving speed; wherein:

[0326] The area of ​​the first model layer is used as the area of ​​the model layer; or, the area of ​​the model layer is determined according to the area of ​​the first model layer and the areas of one or more model layers printed before the first model layer; or, the area of ​​the model layer is determined according to the areas of one or more model layers of the printed model; wherein, when the area of ​​the model layer is determined according to the areas of multiple model layers, the area of ​​the model layer is the average or median of the areas of the multiple model layers; and / or,

[0327] The lifting height of the printing platform corresponding to the release of the first model layer is used as the lifting height of the printing platform; or, the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of the first model layer and the lifting height of the printing platform corresponding to one or more model layers released before the first model layer; or, the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of one or more model layers of the printed model; wherein, when the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of multiple model layers, the lifting height of the printing platform is the average or median of the lifting heights of the printing platform corresponding to the release of multiple model layers.

[0328] Reference number 19, based on reference number 1, the method further includes:

[0329] Obtaining a moving speed set by a user, or obtaining a moving speed set corresponding to a model layer in a slice file of the model to be printed;

[0330] The first moving side of the trough is controlled to move downward at the moving speed.

[0331] Reference numeral 20, based on reference numeral 1, controlling the moving mechanism to drive the first moving side of the trough to move downward includes:

[0332] Control the moving mechanism to drive the first moving side of the trough to move downward at a constant speed or at a variable speed;

[0333] When the first moving side of the trough changes speed and moves downward, the first moving side is first controlled to move downward at the second speed and then at the third speed, or the first moving side is first controlled to move downward at the fourth speed and then at the fifth speed, or the first moving side is first controlled to move downward at the sixth speed and then at the seventh speed and then at the eighth speed, or the first moving side is first controlled to move downward at the ninth speed and then at the tenth speed and then at the eleventh speed;

[0334] Among them, the second speed is greater than the third speed, the fourth speed is less than the fifth speed, the sixth speed is greater than the seventh speed and the seventh speed is greater than the eighth speed, the ninth speed is less than the tenth speed and the tenth speed is less than the eleventh speed.

[0335] Reference number 21, based on reference number 20, the method further includes:

[0336] When the first moving side of the trough changes speed and moves downward, the speed switching node is determined according to the height, time or position to which the first moving side of the trough moves downward.

[0337] Reference numeral 22, based on reference numeral 1, the moving mechanism includes a driving device and a cam, the cam is connected to the first moving side of the trough; the controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough includes:

[0338] The driving device is controlled to drive the cam to rotate, so as to drive the first movable side of the trough to move downward, so as to tilt the trough, wherein the downward moving speed of the first movable side of the trough is controlled by controlling the rotation speed of the cam.

[0339] Reference number 23, based on reference number 1, the trough comprises two long sides and two short sides, wherein:

[0340] The first moving side is one of the long sides, and the opposite side of the first moving side is the other long side; or

[0341] The first moving side is one of the short sides, and the opposite side of the first moving side is the other short side.

[0342] Reference numeral 24, based on reference numerals 1 to 23, the trough comprises a first moving side and a second side opposite to the first moving side, wherein:

[0343] The second side of the material trough is a fixed side, and the second side of the material trough is hinged to the inner side of the upper bottom plate of the light-curing printing device; or

[0344] The second side of the material trough is a movable side, and a fixed end is included between the first movable side and the second side of the material trough. The material trough is movably connected to the upper base plate through the fixed end, and the distance between the first movable side and the fixed end is greater than the distance between the second side and the fixed end.

[0345] The present application also provides the following embodiments:

[0346] Reference numeral 25, a three-dimensional model slicing method, applied to generate a slicing file for a light-curing printing device to print a model, the method comprising:

[0347] Acquire three-dimensional data of the model to be printed;

[0348] Determine the placement position of the to-be-printed model on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device;

[0349] Slicing the model to be printed to generate a model layer obtained by slicing the model to be printed, and determining a minimum required release height corresponding to the model layer;

[0350] The slice file is obtained according to the model layer and the minimum required height for release.

[0351] Reference numeral 26, based on reference numeral 25, obtaining the slice file according to the model layer and the minimum required release height includes:

[0352] Using the minimum required release height as the model layer association parameter to obtain the slice file; and / or,

[0353] The step of obtaining the slice file according to the model layer and the minimum required release height includes:

[0354] Determining a target release distance according to a difference between the minimum required release height and a model layer thickness of the model layer;

[0355] Determining a movable distance of a printing area of ​​a material trough of the photocurable printing device close to a first movable side according to a device type of the photocurable printing device;

[0356] If the movable distance is less than the target release distance, setting in the slice file to print the model to be printed in a first printing mode, the first printing mode is a printing mode in which a printing position corresponding to a first model layer of the model to be printed is lower than a position to which the printing platform is lifted during printing of a second model layer of the model to be printed, and the second model layer is a model layer previous to the first model layer;

[0357] If the movable distance is greater than or equal to the target release distance, the model to be printed is set to be printed in a second printing mode in the slicing file; the second printing mode is a printing mode in which a printing position corresponding to a first model layer of the model to be printed is higher than or equal to a position to which the printing platform is lifted during the printing process of a second model layer of the model to be printed, and the second model layer is a model layer previous to the first model layer.

[0358] Reference numeral 27, based on reference numeral 25, determining the placement position of the to-be-printed model on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device includes:

[0359] Determining a target release distance according to a difference between the minimum required release height and a model layer thickness of the model layer;

[0360] Determining a movable distance of a printing area of ​​a material trough of the photocurable printing device close to a first movable side according to a device type of the photocurable printing device;

[0361] If the movable distance is greater than or equal to the target release distance, obtaining the placement position of the to-be-printed model on the material tank of the light-curing printing device;

[0362] According to the placement position of the model to be printed on the material slot of the light-curing printing device, determining the corresponding moving distance of each printing position of the model to be printed when the first moving side is in a state of maximum moving distance;

[0363] If the corresponding moving distances of the various printing positions of the to-be-printed model are greater than or equal to the target release distance, the slicing process is performed;

[0364] If the corresponding moving distances of at least part of the printing positions of the model to be printed are less than the target release distance, the placement position of the model to be printed on the material trough of the light-curing printing device is moved so that when the first moving side is in a state of maximum moving distance, the corresponding moving distances of each printing position of the model to be printed are greater than or equal to the target release distance, and then the slicing process is performed.

[0365] Reference numeral 28, based on reference numeral 27, obtaining the slice file according to the model layer and the minimum required release height includes:

[0366] Generate an inclined release printable mark, wherein the inclined release printable mark indicates that the slice file can be normally printed on the corresponding light-curing printing device;

[0367] The tilted release printable mark is placed into the slice file.

[0368] Reference numeral 29, based on reference numeral 25, determining the placement position of the model to be printed on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device includes:

[0369] Determine one or more optimal printing starting points in a printing area of ​​a material tank of the light-curing printing device according to the device type of the light-curing printing device;

[0370] Determine a point of the to-be-printed model that is closest to the first moving side of the material slot of the light-curing printing device as a target point;

[0371] Moving the placement position of the to-be-printed model on the material trough so that the target point coincides with at least one of the optimal printing starting points;

[0372] The distance between the optimal printing starting point and the first moving side is less than the third preset distance; or the distance between the optimal printing starting point and the opposite side of the first moving side is greater than the third preset distance; or the percentage of the distance between the optimal printing starting point and the first moving side in the distance between the first moving side of the material trough and the opposite side of the first moving side of the material trough is less than the third preset percentage, and the third preset percentage is any percentage from 90% to 0%; or the percentage of the distance between the optimal printing starting point and the opposite side of the first moving side in the distance between the first moving side of the material trough and the opposite side of the first moving side of the material trough is greater than the fourth preset percentage, and the third preset percentage is any percentage from 0% to 20%.

[0373] Reference numeral 30, based on reference numeral 25, obtaining the slice file according to the model layer and the minimum required release height includes:

[0374] Determining a platform lifting time according to a lifting speed of a printing platform of the light-curing printing device and a model layer thickness of the model layer;

[0375] Determining a moving speed of the first moving side according to a moving distance of the first moving side of the trough corresponding to the model layer and a lifting time of the platform;

[0376] The moving speed of the first moving side is associated with the corresponding model layer and put into the slice file.

[0377] The present application also provides the following embodiments:

[0378] Reference numeral 31, a light-curing printing device, comprising:

[0379] A material trough, used to hold printing materials;

[0380] A printing platform, located above the material trough, for carrying the printing model;

[0381] A light source, located below the material tank, for emitting curing light;

[0382] A moving mechanism, used to drive the first moving side of the trough to move downward or upward;

[0383] A memory storing programs or instructions;

[0384] A processor, wherein when executing the program or instruction, the processor implements the steps of the release control method of the light-curing printing device as described in any one of numbers 1 to 24.

[0385] Reference numeral 32, based on reference numeral 31, the light-curing printing device further includes:

[0386] An upper bottom plate, wherein the upper bottom plate is provided with a slot for placing the material trough;

[0387] The moving mechanism includes a driving device and a displacement structure, the displacement structure is connected to the first moving side of the material trough, the driving device drives the displacement structure to realize the movement of the first moving side of the material trough, and the displacement structure includes one of a cam, a cylinder and a screw.

[0388] Reference numeral 33, based on reference numeral 32, the trough comprises a first moving side and a second side opposite to the first moving side, wherein:

[0389] The second side of the trough is a fixed side, and the second side of the trough is hinged to the inner side of the upper bottom plate; or

[0390] The second side of the material trough is a movable side, and a fixed end is included between the first movable side and the second side of the material trough. The material trough is movably connected to the upper base plate through the fixed end, and the distance between the first movable side and the fixed end is greater than the distance between the second side and the fixed end.

[0391] Reference numeral 34, based on reference numeral 31, the moving mechanism further comprises:

[0392] A rotating middle plate, wherein the rotating middle plate is fixedly connected to the material trough;

[0393] The sensing component includes a sensor and a sensing sheet. The sensor is arranged on the upper base plate of the light-curing printing device, and the sensor is fixedly connected to the upper base plate. The sensing sheet is arranged on the rotating middle plate, and the sensing sheet is fixedly connected to the rotating middle plate. The sensing sheet and the sensor cooperate with each other to generate a sensing signal.

[0394] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A release control method for a light-curing printing device, characterized in that: The light-curing printing device includes a printing platform, a material tank, a light source and a moving mechanism, and the method includes: Controlling the printing platform to be located at a printing position corresponding to a first model layer of the model to be printed, wherein the printing position corresponding to the first model layer is higher than or equal to a position to which the printing platform is lifted during the printing of a second model layer of the model to be printed, the second model layer being a previous model layer of the first model layer; Control the light source to emit curing light to cure the printing material in the material tank to obtain the first model layer; Controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough, and controlling the printing platform to lift up to achieve the release of the first model layer; The method further comprises: In response to a model printing instruction of the model to be printed or a start printing instruction of one layer of the model to be printed, a sensing signal of a sensing component of the moving mechanism is obtained; the sensing component is used to detect whether the bottom surface of the trough is in a parallel position with the printing platform or whether the trough returns to its original position; When it is determined according to the sensing signal that the bottom surface of the trough is parallel to the printing platform or the first movable side of the trough is located at a preset reset position, printing of the model to be printed is performed; When it is determined according to the sensing signal that the bottom surface of the material trough is not in a parallel state with the printing platform or the first movable side of the material trough is not located at a preset reset position, the moving mechanism is controlled to drive the first movable side of the material trough to move.

2. The method according to claim 1, characterized in that The printing position corresponding to the first model layer is higher than or equal to the highest position to which the printing platform is lifted during the printing process of the second model layer of the model to be printed; and / or, The printing position corresponding to the first model layer is higher than or equal to the position to which the printing platform is lifted when the release process of the second model layer of the model to be printed is completed; and / or, The printing position corresponding to the first model layer is higher than or equal to any position to which the printing platform is lifted during the printing process of the second model layer of the model to be printed; and / or, The printing position corresponding to the first model layer is higher than or equal to the position to which the printing platform is lifted when printing of the second model layer of the model to be printed is completed.

3. The method according to claim 2, characterized in that The controlling the printing platform to be located at a printing position corresponding to the first model layer includes: When the position to which the printing platform is lifted during printing of the second model layer is lower than the printing position corresponding to the first model layer, controlling the printing platform to move up to the printing position corresponding to the first model layer; or When the position to which the printing platform is lifted during printing of the second model layer is level with the printing position corresponding to the first model layer, the printing platform is controlled to remain at the printing position corresponding to the first model layer.

4. The method according to claim 1, characterized in that: During the release process of the first model layer, a sum of a downward movement distance of the first moving side of the material trough and a model layer thickness of the first model layer is greater than or equal to a total release height of the first model layer.

5. The method according to claim 1, characterized in that During the release process of the first model layer, the sum of the downward movement distance of the first moving side of the material trough and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer; and / or, Determine a corresponding position of at least one position of the first model layer in the material trough as a first corresponding position, when the first movable side moves downward to a first set position, the first corresponding position moves downward by a first moving distance, and during the release process of the first model layer, the sum of the first moving distance and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer; and / or, Determine a second corresponding position of the first model layer in the material trough, and determine a moving distance of a portion of the second corresponding position closest to the first moving side when it moves downward as a second moving distance, and during the release process of the first model layer, a sum of the second moving distance and the model layer thickness of the first model layer is greater than or equal to a minimum required release height of the first model layer; and / or, Determine a third corresponding position of the first model layer in the material trough, and determine a moving distance of a portion of the third corresponding position farthest from the first moving side downward as a third moving distance, and during the release process of the first model layer, a sum of the third moving distance and a model layer thickness of the first model layer is greater than or equal to a minimum required release height of the first model layer; and / or, During the release process of the first model layer, the sum of the downward movement distance of the opposite side of the first moving side of the material trough and the model layer thickness of the first model layer is greater than or equal to the minimum required release height of the first model layer.

6. The method according to claim 5, characterized in that The method further comprises: Obtaining a slicing file, and if the obtained slicing file does not carry the first identifier, determining the minimum required release height of the first model layer according to the release height of the model layer in the slicing file; or, Acquire a slicing file, and if the acquired slicing file carries a first identifier, determine the minimum required release height of the first model layer according to the minimum required release height of the model layer in the slicing file; or, The minimum required release height of the first model layer is determined according to one or more of the area, exposure time, and exposure energy of the first model layer.

7. The method according to claim 1, characterized in that The maximum distance or the minimum distance between the molding position of the model to be printed corresponding to the material trough and the first moving side of the material trough is determined as the first target distance, wherein the first target distance is less than or equal to the first preset distance, or the first target distance accounts for a percentage of the distance between the first moving side of the material trough and the opposite side of the first moving side of the material trough as the first target percentage; the method also includes: ensuring that the first target percentage is less than or equal to the first preset percentage, the first preset percentage is any percentage from 90% to 0%, and ensuring that the first target percentage is less than or equal to the first preset percentage includes: if the first target percentage is greater than the first preset percentage, modifying the exposure image of each model layer of the model to be printed to move the molding position of the model to be printed corresponding to the material trough until the first target percentage is less than or equal to the first preset percentage; or, The maximum distance or the minimum distance between the molding position of the model to be printed on the material trough corresponding to the side opposite to the first moving side of the material trough is determined as the second target distance, wherein the second target distance is greater than or equal to the second preset distance, or the percentage of the second target distance in the distance between the first moving side of the material trough and the side opposite to the first moving side of the material trough is the second target percentage; the method also includes: ensuring that the second target percentage is greater than or equal to the second preset percentage, and the second preset percentage is any percentage from 0% to 20%; ensuring that the second target percentage is greater than or equal to the second preset percentage includes: if the second target percentage is less than the second preset percentage, modifying the exposure image of each model layer of the model to be printed to move the molding position of the model to be printed on the material trough corresponding to the second target percentage until the second target percentage is greater than or equal to the second preset percentage.

8. The method according to claim 1, characterized in that Before starting printing of the to-be-printed model, the method further includes: If it is detected that the moving mechanism is in working mode, detecting whether the molding position of the to-be-printed model on the material trough corresponding to the molding position is within the first printing area, if so, executing the printing procedure normally, if not, adjusting the molding position of the to-be-printed model on the material trough to be within the first printing area; If it is detected that the moving mechanism is in sleep mode, detecting whether the molding position of the to-be-printed model on the material trough corresponding to the molding position is in the second printing area, if so, executing the printing procedure normally, if not, adjusting the molding position of the to-be-printed model on the material trough to be in the second printing area; Wherein, the second printing area includes the first printing area; or the second printing area includes a first sub-area and a second sub-area, the first sub-area overlaps with the first printing area, the second sub-area is located outside the first sub-area, and the second sub-area has no overlapping area with the first printing area.

9. The method according to claim 8, characterized in that The method of adjusting the molding position of the to-be-printed model on the material trough includes: Modify the exposure image of each model layer of the model to be printed to move the molding position of the model to be printed corresponding to the molding position on the material tank; or, Adjusting the position of the model to be printed on the printing platform to adjust the molding position of the model to be printed on the material trough; or, The position of the printing platform is adjusted to adjust the molding position of the model to be printed on the material trough.

10. The method according to claim 1, characterized in that Before starting printing of the to-be-printed model, the method further includes: Moving the to-be-cured portion of the exposed image of at least a portion of the model layer of the to-be-printed model toward a position close to the first moving side of the material trough; The to-be-cured portions of the exposed images of all the model layers of the to-be-printed model are moved toward a position close to the first moving side of the material trough.

11. The method according to claim 1, characterized in that: The method further comprises: After controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough, controlling the moving mechanism to drive the first moving side of the trough to move upward.

12. The method according to claim 1, characterized in that When the first movable side is located at a position where the bottom surface of the material trough is parallel to the printing platform, the sensing component sends a first sensing signal, and / or, when the first movable side is located at a preset reset position, the sensing component sends a second sensing signal; when the first movable side is located at other positions where the bottom surface of the material trough is not parallel to the printing platform, the sensing component sends a third sensing signal, and / or, when the first movable side is located at other positions deviating from the preset reset position, the sensing component sends a fourth sensing signal; When it is determined according to the sensing signal that the bottom surface of the trough is in a parallel position with the printing platform or the first movable side of the trough is in a preset reset position, printing of the model to be printed is performed, including: if the first sensing signal and / or the second sensing signal is obtained, it is determined that the bottom surface of the trough is in a parallel position with the printing platform or the first movable side of the trough is in a preset reset position, and printing of the model to be printed is performed; When it is determined according to the sensing signal that the bottom surface of the material trough is not in a parallel state with the printing platform or the first movable side of the material trough is not located at the preset reset position, the moving mechanism is controlled to drive the first movable side of the material trough to move, including: if the third sensing signal and / or the fourth sensing signal is obtained, it is determined that the bottom surface of the material trough is not in a parallel state with the printing platform or the first movable side of the material trough is not located at the preset reset position, and the moving mechanism is controlled to drive the first movable side of the material trough to move until the first sensing signal and / or the second sensing signal is obtained.

13. The method according to claim 12, characterized in that The method further comprises: After the printing of the to-be-printed model is completed, the moving mechanism is controlled to drive the first moving side of the material trough to move until the first sensing signal and / or the second sensing signal is obtained.

14. The method according to claim 12 or 13, characterized in that The method further comprises: During the printing process of the model to be printed, if the first sensing signal and / or the second sensing signal is not obtained within a first preset time period, printing is stopped and a warning signal is issued; and / or, During the printing process of the model to be printed, if the third sensing signal and / or the fourth sensing signal are not obtained within the second preset time period, the printing is stopped and a warning signal is issued; and / or, During the printing process of the model to be printed, if the first sensing signal and / or the second sensing signal are not obtained within a first preset time period, and / or the third sensing signal and / or the fourth sensing signal are not obtained within a second preset time period, the current of the driving device of the moving mechanism is obtained, and it is determined whether the driving device is abnormal based on the current.

15. The method according to claim 1, characterized in that The controlling the moving mechanism to drive the first moving side of the material trough to move downward, and controlling the printing platform to lift, comprises: Control the moving mechanism to drive the first moving side of the material trough to move downward, and control the printing platform to lift up; or, Control the moving mechanism to drive the first moving side of the trough to move downward for a third preset time or a first preset height, or after moving downward to a first preset position, control the printing platform to be lifted and the first moving side of the trough to move downward; or, The printing platform is controlled to be lifted for a fourth preset time period or a second preset height, or lifted to a second preset position, and then the moving mechanism is controlled to drive the first moving side of the material trough to move downward and lift the printing platform.

16. The method according to claim 1, characterized in that The controlling the moving mechanism to drive the first moving side of the trough to move downwards comprises: Control the moving mechanism to drive the first moving side of the trough to move downward for a fifth preset time period; or, Control the moving mechanism to drive the first moving side of the material trough to move downward to a third preset height, wherein the third preset height is equal to the difference between the release height of the first model layer and the lifting height of the printing platform; or, The moving mechanism is controlled to drive the first moving side of the material trough to move downward from a first position to a second position, and the height difference between the first position and the second position is greater than or equal to the difference between the release height of the first model layer and the lifting height of the printing platform.

17. The method according to claim 1, characterized in that The method further comprises: The moving mechanism is controlled according to the first speed to drive the first moving side of the material trough to move downward. During the printing process of at least part of the model layer of the model to be printed, the first speed is negatively correlated with the size of the model layer area of ​​the current model layer, and / or the first speed is negatively correlated with the lifting height of the printing platform corresponding to the current model layer.

18. The method according to claim 1, characterized in that The method further comprises: Determine the moving speed according to the model layer area of ​​the model layer of the model to be printed and / or the lifting height of the printing platform corresponding to the model layer of the model to be printed, and then control the first moving side of the trough to move downward at the moving speed; wherein: The area of ​​the first model layer is used as the area of ​​the model layer; or, the area of ​​the model layer is determined according to the area of ​​the first model layer and the areas of one or more model layers printed before the first model layer; or, the area of ​​the model layer is determined according to the areas of one or more model layers of the printed model; wherein, when the area of ​​the model layer is determined according to the areas of multiple model layers, the area of ​​the model layer is the average or median of the areas of the multiple model layers; and / or, The lifting height of the printing platform corresponding to the release of the first model layer is used as the lifting height of the printing platform; or, the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of the first model layer and the lifting height of the printing platform corresponding to one or more model layers released before the first model layer; or, the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of one or more model layers of the printed model; wherein, when the lifting height of the printing platform is determined according to the lifting height of the printing platform corresponding to the release of multiple model layers, the lifting height of the printing platform is the average or median of the lifting heights of the printing platform corresponding to the release of multiple model layers.

19. The method according to claim 1, characterized in that The method further comprises: Obtaining a moving speed set by a user, or obtaining a moving speed set corresponding to a model layer in a slice file of the model to be printed; The first moving side of the trough is controlled to move downward at the moving speed.

20. The method according to claim 1, characterized in that The controlling the moving mechanism to drive the first moving side of the trough to move downwards comprises: Control the moving mechanism to drive the first moving side of the trough to move downward at a constant speed or at a variable speed; When the first moving side of the trough changes speed and moves downward, the first moving side is first controlled to move downward at the second speed and then at the third speed, or the first moving side is first controlled to move downward at the fourth speed and then at the fifth speed, or the first moving side is first controlled to move downward at the sixth speed and then at the seventh speed and then at the eighth speed, or the first moving side is first controlled to move downward at the ninth speed and then at the tenth speed and then at the eleventh speed; Among them, the second speed is greater than the third speed, the fourth speed is less than the fifth speed, the sixth speed is greater than the seventh speed and the seventh speed is greater than the eighth speed, the ninth speed is less than the tenth speed and the tenth speed is less than the eleventh speed.

21. The method according to claim 20, characterized in that The method further comprises: When the first moving side of the trough changes speed and moves downward, the speed switching node is determined according to the height, time or position to which the first moving side of the trough moves downward.

22. The method according to claim 1, characterized in that The moving mechanism includes a driving device and a cam, and the cam is connected to the first moving side of the trough; the controlling the moving mechanism to drive the first moving side of the trough to move downward to tilt the trough includes: The driving device is controlled to drive the cam to rotate, so as to drive the first movable side of the material trough to move downward, so as to tilt the material trough, wherein the downward moving speed of the first movable side of the material trough is controlled by controlling the rotation speed of the cam.

23. The method according to claim 1, characterized in that The trough comprises two long sides and two short sides, wherein: The first moving side is one of the long sides, and the opposite side of the first moving side is the other long side; or, The first moving side is one of the short sides, and the opposite side of the first moving side is the other short side.

24. The method according to any one of claims 1 to 23, characterized in that The trough comprises a first moving side and a second side opposite to the first moving side, wherein: The second side of the material trough is a fixed side, and the second side of the material trough is hinged to the inner side of the upper bottom plate of the light-curing printing device; or, The second side of the material trough is a movable side, and a fixed end is included between the first movable side and the second side of the material trough. The material trough is movably connected to the upper base plate through the fixed end, and the distance between the first movable side and the fixed end is greater than the distance between the second side and the fixed end.

25. A three-dimensional model slicing method, characterized in that: The method is applied to generate a slice file for a light-curing printing device to print a model, and the method comprises: Acquire three-dimensional data of the model to be printed; Determine the placement position of the to-be-printed model on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device; Slicing the model to be printed to generate a model layer obtained by slicing the model to be printed, and determining a minimum required release height corresponding to the model layer; Obtain the slice file according to the model layer and the minimum required release height; The step of obtaining the slice file according to the model layer and the minimum required release height includes: Using the minimum required release height as the model layer association parameter to obtain the slice file; and / or, The step of obtaining the slice file according to the model layer and the minimum required release height includes: Determining a target release distance according to a difference between the minimum required release height and a model layer thickness of the model layer; Determining a movable distance of a printing area of ​​a material trough of the photocurable printing device close to a first movable side according to a device type of the photocurable printing device; According to the relationship between the movable distance and the target release distance, the slicing file is set to print the model to be printed in different printing modes, wherein under different printing modes, the height between the printing position corresponding to the first model layer of the model to be printed and the position to which the printing platform is lifted during the printing of the second model layer of the model to be printed is different, and the second model layer is the previous model layer of the first model layer.

26. The method according to claim 25, characterized in that The step of setting, in the slice file, printing the to-be-printed model in different printing modes according to the size relationship between the movable distance and the target release distance comprises: If the movable distance is less than the target release distance, setting in the slice file to print the model to be printed in a first printing mode, the first printing mode being a printing mode in which a printing position corresponding to a first model layer of the model to be printed is lower than a position to which the printing platform is lifted during printing of a second model layer of the model to be printed; If the movable distance is greater than or equal to the target release distance, the model to be printed is set to be printed in a second printing mode in the slicing file; the second printing mode is a printing mode in which a printing position corresponding to a first model layer of the model to be printed is higher than or equal to a position to which the printing platform is lifted during printing of a second model layer of the model to be printed.

27. The method according to claim 25, characterized in that The step of determining the placement position of the to-be-printed model on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device comprises: Determining a target release distance according to a difference between the minimum required release height and a model layer thickness of the model layer; Determining a movable distance of a printing area of ​​a material trough of the photocurable printing device close to a first movable side according to a device type of the photocurable printing device; If the movable distance is greater than or equal to the target release distance, obtaining the placement position of the to-be-printed model on the material tank of the light-curing printing device; According to the placement position of the model to be printed on the material slot of the light-curing printing device, determining the corresponding moving distance of each printing position of the model to be printed when the first moving side is in a state of maximum moving distance; If the corresponding moving distances of the various printing positions of the to-be-printed model are greater than or equal to the target release distance, the slicing process is performed; If the corresponding moving distances of at least part of the printing positions of the model to be printed are less than the target release distance, the placement position of the model to be printed on the material trough of the light-curing printing device is moved so that when the first moving side is in a state of maximum moving distance, the corresponding moving distances of each printing position of the model to be printed are greater than or equal to the target release distance, and then the slicing process is performed.

28. The method according to claim 27, characterized in that The step of obtaining the slice file according to the model layer and the minimum required release height includes: Generate an inclined release printable mark, wherein the inclined release printable mark indicates that the slice file can be normally printed on the corresponding light-curing printing device; The tilted release printable mark is placed into the slice file.

29. The method according to claim 25, characterized in that The step of determining the placement position of the to-be-printed model on the printing platform of the light-curing printing device or on the material tank of the light-curing printing device comprises: Determine one or more optimal printing starting points in a printing area of ​​a material tank of the light-curing printing device according to the device type of the light-curing printing device; Determine a point of the to-be-printed model that is closest to the first moving side of the material slot of the light-curing printing device as a target point; Moving the placement position of the model to be printed on the material trough so that the target point coincides with at least one of the optimal printing starting points; The distance between the optimal printing starting point and the first moving side is less than a third preset distance; or the distance between the optimal printing starting point and the opposite side of the first moving side is greater than a third preset distance; or the percentage of the distance between the optimal printing starting point and the first moving side in the distance between the first moving side of the material trough and the opposite side of the first moving side of the material trough is less than a third preset percentage, and the third preset percentage is any percentage from 90% to 0%; or the percentage of the distance between the optimal printing starting point and the opposite side of the first moving side in the distance between the first moving side of the material trough and the opposite side of the first moving side of the material trough is greater than a fourth preset percentage, and the third preset percentage is any percentage from 0% to 20%.

30. The method according to claim 25, characterized in that The step of obtaining the slice file according to the model layer and the minimum required release height includes: Determining a platform lifting time according to a lifting speed of a printing platform of the light-curing printing device and a model layer thickness of the model layer; Determining a moving speed of the first moving side according to a moving distance of the first moving side of the trough corresponding to the model layer and a lifting time of the platform; The moving speed of the first moving side is associated with the corresponding model layer and put into the slice file.

31. A light-curing printing device, characterized in that: include: A material trough, used to hold printing materials; A printing platform, located above the material trough, for carrying the printing model; A light source, located below the material tank, for emitting curing light; A moving mechanism, used to drive the first moving side of the trough to move downward or upward; A memory storing programs or instructions; A processor, wherein when executing the program or instruction, the processor implements the steps of the release control method of the light-curing printing device according to any one of claims 1 to 24.

32. The device according to claim 31, characterized in that The light-curing printing device also includes: An upper bottom plate, wherein the upper bottom plate is provided with a slot for placing the material trough; The moving mechanism includes a driving device and a displacement structure, the displacement structure is connected to the first moving side of the material trough, the driving device drives the displacement structure to realize the movement of the first moving side of the material trough, and the displacement structure includes one of a cam, a cylinder and a screw.

33. The device according to claim 32, characterized in that The trough comprises a first moving side and a second side opposite to the first moving side, wherein: The second side of the trough is a fixed side, and the second side of the trough is hinged to the inner side of the upper bottom plate; or, The second side of the material trough is a movable side, and a fixed end is included between the first movable side and the second side of the material trough. The material trough is movably connected to the upper base plate through the fixed end, and the distance between the first movable side and the fixed end is greater than the distance between the second side and the fixed end.

34. The device according to claim 31, characterized in that The moving mechanism also includes: A rotating middle plate, wherein the rotating middle plate is fixedly connected to the material trough; The sensing component includes a sensor and a sensing sheet. The sensor is arranged on the upper base plate of the light-curing printing device, and the sensor is fixedly connected to the upper base plate. The sensing sheet is arranged on the rotating middle plate, and the sensing sheet is fixedly connected to the rotating middle plate. The sensing sheet and the sensor cooperate with each other to generate a sensing signal.

35. A computer device, characterized in that: It comprises a processor and a memory, wherein the memory stores a program or instruction running on the processor, and when the program or instruction is executed by the processor, the steps of the three-dimensional model slicing method as described in any one of claims 25 to 30 are implemented.

36. A readable storage medium having a program or instruction stored thereon, characterized in that: When the program or instruction is executed by a processor, the steps of the method according to any one of claims 1 to 30 are implemented.

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