3D printing platform and 3D printing device

Abstract

The present invention describes a 3D printing platform and a 3D printing device. The 3D printing platform comprises: a base; at least one supporting member, the supporting member being disposed on the base and protruding out of a top face of the base, and the supporting member having a supporting face formed at a top end thereof; a forming base plate, placed on the supporting surface; and a platform fixing member, detachably connecting the forming substrate to the base.

Description

3D printing platform and 3D printing equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 14, 2023, with application number 2023117233027 and invention name “3D printing platform and 3D printing equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of printers, and in particular to a 3D printing platform and a 3D printing device. Background Art

[0003] To avoid damaging the finished model during operation, existing 3D printing equipment usually has a detachable molding base plate on which the 3D model is printed. After printing is completed, the worker removes the molding base plate to remove the model, thus eliminating the need for direct contact with the finished model.

[0004] When some existing build substrates are installed on the support components of 3D printing equipment, it is difficult to ensure the same flatness when the same build substrate or a different build substrate is installed on the support component again. Therefore, if the build substrate is not flat after placement, the staff must level it. If leveling is required every time a build substrate is replaced, it will undoubtedly increase the staff's workload, waste time and effort, and reduce work efficiency.

[0005] Summary of the Invention

[0006] In view of the above existing situation, the present invention aims to provide a 3D printing platform and a 3D printing device that are easy to use and save time and effort.

[0007] To this end, the first aspect of the present invention provides a 3D printing platform, which includes: a base; at least one support member, which is arranged on the base and protrudes from the top surface of the base, and the top end of the support member forms a support surface; a molding substrate, which is placed on the support surface; and a platform fixing member for detachably connecting the molding substrate to the base.

[0008] In the 3D printing platform involved in the present invention, optionally, it includes at least two staggered support members, at least two of the support members are in line contact with the molding substrate, or at least two of the support members are in line contact and point contact with the molding substrate.

[0009] In the 3D printing platform involved in the present invention, optionally, it includes at least three staggered support members, and at least three of the support members are in point contact with the molding substrate.

[0010] In the 3D printing platform involved in the present invention, optionally, each of the support members is a spherical structure.

[0011] In the 3D printing platform involved in the present invention, optionally, three support members are included, and the three support members are distributed in an axisymmetric manner.

[0012] In the 3D printing platform involved in the present invention, optionally, the molding substrate is magnetically engaged with the base through a platform fixing member.

[0013] In the 3D printing platform involved in the present invention, optionally, the platform fixing member includes a first magnet and a second magnet, the forming substrate is provided with a plurality of the first magnets in the directions of the X-axis and the Y-axis, and the base is provided with a plurality of the second magnets in the directions of the X-axis and the Y-axis, the positions of which correspond to the first magnets; when the forming substrate is placed on the supporting surface, the first magnet and the second magnet are magnetically engaged.

[0014] In the 3D printing platform involved in the present invention, optionally, the platform fixing part also includes a third magnet and a fourth magnet, and a plurality of the third magnets are provided on at least one side of the forming substrate in the direction of the Z axis, and a plurality of the fourth magnets are provided on the top of the base at positions corresponding to the third magnets; when the forming substrate is placed on the supporting surface, the third magnet and the fourth magnet are magnetically attracted to each other.

[0015] In the 3D printing platform involved in the present invention, optionally, the base is provided with a groove, the inner contour of the groove is adapted to the local outer contour of the support member, and the support member is accommodated in the groove.

[0016] In the 3D printing platform involved in the present invention, optionally, the groove is arranged in a conical structure, and the support member is arranged in a spherical structure.

[0017] In the 3D printing platform involved in the present invention, optionally, the 3D printing platform further includes a limiting member, which is connected to the top of the base and is used to fix the supporting member in the groove.

[0018] In the 3D printing platform involved in the present invention, optionally, the base includes a bottom plate and several side plates; the bottom plate is connected to several side plates on a side surface in the X-axis direction, and the bottom plate is connected to several side plates on a side surface in the Y-axis direction, at least one support member is arranged on the top of the bottom plate, and the side plate protrudes from the top surface of the bottom plate; the forming substrate is provided with several first magnets in the directions of the X-axis and the Y-axis, and is provided with several second magnets on the side facing the bottom plate, and the positions of the second magnets correspond to the first magnets. When the forming substrate is placed on the supporting surface, the first magnets and the second magnets are magnetically engaged.

[0019] In the 3D printing platform involved in the present invention, optionally, the 3D printing platform further includes a diamond-like coating; the diamond-like coating is provided on the molding substrate, and the side of the diamond-like coating facing away from the base has a bearing plane for bearing the printed part.

[0020] A second aspect of the present invention provides a 3D printing device, which includes: the 3D printing platform as described above; a leveling mechanism, the leveling mechanism is used to connect to the base; a liquid tank, the liquid tank is used to accommodate liquid photosensitive material, when the molding substrate is located in the liquid tank, the base at least partially extends outside the liquid tank to connect to the leveling mechanism.

[0021] The 3D printing platform involved in the present invention includes a base, at least one support member, a molding substrate, and a platform fixing member. The top of the support member forms a support surface, and the molding substrate is placed on the support surface. According to this structure, the support surface formed by the top of at least one support member can be used to place the molding substrate. As a result, the molding substrate is placed on top of the base. After the molding substrate is leveled for the first time, when it is placed on the same molding substrate again, there is no need to level it again after placement, and it can be used directly. It has high repeatability and interchangeability, is more convenient to use, and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Embodiments of the present invention will now be explained in further detail, by way of example only, with reference to the accompanying drawings, in which:

[0023] FIG1 is a schematic diagram showing the overall structure of a 3D printing platform involved in the present invention.

[0024] FIG2 is an exploded view showing the 3D printing platform involved in the present invention.

[0025] FIG3 is another exploded view showing the 3D printing platform involved in the present invention.

[0026] FIG4 is another exploded view showing the 3D printing platform involved in the present invention.

[0027] FIG5 is a side view showing the 3D printing platform involved in the present invention.

[0028] FIG. 6 is a side view showing a base and a support member according to the present invention.

[0029] FIG. 7 is another exploded view showing the 3D printing platform according to the present invention.

[0030] FIG8 is a schematic diagram showing the overall structure of the 3D printing device involved in the present invention.

[0031] Figure numerals: 100, 3D printing equipment; 1, base; 11, groove; 12, empty slot; 13, bottom plate; 14, side plate; 2, support member; 3, molding substrate; 4, platform fixing member; 41, first magnet; 42, second magnet; 43, third magnet; 44, fourth magnet; 5, limit member; 6, liquid tank; 7, leveling mechanism. DETAILED DESCRIPTION

[0032] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, identical components will be assigned identical reference numerals, and duplicate descriptions will be omitted. Furthermore, the accompanying drawings are merely schematic, and the proportions of the dimensions of the components and the shapes of the components may differ from the actual ones.

[0033] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0035] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0036] 1 and 2 , a first aspect of the present invention provides a 3D printing platform, comprising: a base; at least one support member, the support member being disposed on the base and protruding from the top surface of the base, with the top end of the support member forming a support surface; a molding substrate placed on the support surface; and a platform fixing member for detachably connecting the molding substrate to the base.

[0037] The 3D printing platform 3 of the present invention includes a base 1, at least one support member 2, a molding substrate 3, and a platform fixing member 4. The top of the support member 2 forms a support surface, and the molding substrate 3 is placed on the support surface. According to this structure, the support surface formed by the top of at least one support member can be used to place the molding substrate. As a result, the molding substrate is placed on top of the base. After the molding substrate is leveled for the first time, when it is placed on the same molding substrate again, there is no need to level it again after placement, and it can be used directly. It has high repeatability and interchangeability, is more convenient to use, and saves time and effort.

[0038] Specifically, high repeatability can be understood as the ability to place the molding substrate on a support surface, level it once, and then repeatedly remove and place it without re-leveling to meet the usage requirements. High interchangeability can be understood as the ability to use the molding substrate with the support surface of other 3D printing equipment, level it once, and then repeatedly remove and place it without re-leveling to meet the usage requirements.

[0039] As an embodiment, the 3D printing platform 3 may include at least two staggered support members, at least two of which are in line contact with the molding substrate, or at least two of which are in line contact and point contact with the molding substrate. Specifically, the 3D printing platform 3 and the support member 2 are in line contact, which can be understood as the surface where the top of the support member 2 contacts the molding substrate 3 is a narrow, nearly linear structure. For the convenience of description, the areas where the two support members 2 are in line contact with the molding substrate 3 are defined as a first line contact line and a second line contact line, respectively. To ensure the stability of placement, at least two support members are staggered so that the extensions of the first line contact line and the second line contact line are not on the same straight line. The two can be parallel to each other and separated by a certain distance, or the extensions of the two can intersect. In addition, the 3D printing platform 3 and the support member 2 are in point contact, which can be understood as the contact between the molding substrate 3 and the top of the support member 2 (such as the apex of a cone) can be seen as a surface and point contact when observed by the naked eye. To ensure placement stability, the two supports are staggered. When at least two supports 2 and the molding substrate 3 are in a combination of line contact and point contact, the point contact point is not on the extension line of the line contact line.

[0040] As an embodiment, it includes at least three support members that are staggered, and at least three of the support members are in point contact with the molding substrate. Referring to Figure 2, when the number of support members 2 is three, at least three support members are staggered, that is, at least one of the three support members 2 is staggered with the other support members 2 on the horizontal plane. It can also be understood that the connection line between at least one of the support members 2 and the other support members 2 is not on the same straight line, so that the top ends of the three support members 2 can form a supporting surface. According to this structure, the supporting surface formed by the top ends of at least three staggered support members 2 can be used to place the molding substrate 3. As a result, the molding substrate 3 is placed above the base 1, and there is no need to set up a complex mounting structure, thereby reducing the contact area between the molding substrate 3 and the base 1, and also reducing the requirements for the processing accuracy of the molding substrate 3 and the base 1.

[0041] As an embodiment, each of the support members 2 is a spherical structure. As a result, the support member 2 with a spherical structure has equal curvature and surface area in all directions. When the molding substrate 3 is placed on the support member 2 with a spherical structure, the pressure can be evenly distributed to maintain the stability of the structure. In addition, the surface of the support member 2 with a spherical structure is smoother, which can also prevent sharp surfaces from scratching the molding substrate 3. In some examples, the support member 2 with a spherical structure is a silicon nitride ceramic ball, which has high strength and wear resistance, can provide more stable support for the molding substrate 3, and also has a longer service life.

[0042] For ease of description, the support member 2 with a spherical structure is defined as a supporting sphere, and the highest points of the three supporting spheres can be understood as the tangent points of the supporting spheres. When the forming substrate 3 is placed on the supporting surface formed by the three supporting spheres, the forming substrate 3 and the supporting spheres can be seen as surface-to-point contact when observed with the naked eye. As a result, the contact surface between the forming substrate 3 and the three supporting spheres is extremely small, reducing the risk of uneven placement of the forming substrate 3 due to an excessively large contact surface. In some examples, four supporting spheres or more supporting spheres can be provided, which can be set according to customer needs. However, in order to ensure that the contact surface between the forming substrate 3 and the supporting spheres is as small as possible, three supporting spheres are preferred.

[0043] In other examples, the support member 2 may also be in the form of a cone, which is defined as a support cone for the convenience of description. Specifically, three support cones may be provided, with at least one support cone being offset from the other support cones on the horizontal plane, and the top end for contacting the forming substrate 3 is the vertex of the support cone. When the forming substrate 3 is placed on the support surface formed by the three support cones, the forming substrate 3 and the support cone can be regarded as surface-to-point contact, and a very small contact surface can also be formed between the forming substrate 3 and the three support cones. It is understandable that the support surface formed by the top ends of the three supporting spheres or the three supporting cones is a virtual plane. In addition, in some examples, the support member 2 may also be a structure such as a cylinder, in which case the top surface of a cylinder may also form a support surface.

[0044] Of course, in other examples, the shape of the support member 2 is not limited to the above-mentioned structure, and the support member 2 may even be a special shape. Specifically, the support member 2 needs to be configured to form a very small contact surface with the molding substrate 3, and the number of the support members 2 can form a supporting surface.

[0045] As an embodiment, the 3D printing platform 3 includes three support members 2, and the three support members 2 are distributed in an axisymmetric manner. Specifically, the distribution positions of the three support members 2 can form at least one axis of symmetry. As a result, the support members 2 can provide more uniform support for the molding substrate 3, providing more stable support.

[0046] 1 , as an embodiment, the molding substrate 3 is magnetically coupled to the base 1 via a platform fixing member 4. Thus, when the molding substrate 3 is placed on a support surface, the platform fixing member 4 can also magnetically attract the molding substrate 3 to the base 1, thereby fixing the molding substrate 3 to a certain extent.

[0047] Referring to Figures 2 and 3, as an embodiment, the platform fixing member includes a first magnet and a second magnet. The forming substrate is provided with a plurality of the first magnets in both the X-axis and Y-axis directions, and the base is provided with a plurality of the second magnets in both the X-axis and Y-axis directions, corresponding to the first magnets. When the forming substrate is placed on the support surface, the first magnets and the second magnets are magnetically attracted to each other. Specifically, the X-axis and Y-axis directions can be understood as horizontal directions. In this case, the first magnet 41 and the second magnet 42 apply a magnetic attraction force to the forming substrate 3 in the horizontal direction, thereby achieving a certain degree of fixation of the forming substrate 3.

[0048] Referring to Figures 3 and 4, as an embodiment, the platform fixing member 4 further includes a third magnet 43 and a fourth magnet 44. A plurality of third magnets 43 are provided on at least one surface of the forming substrate 3 in the Z-axis direction, and a plurality of fourth magnets 44 are provided on the top of the base 1, positioned corresponding to the third magnets 43. When the forming substrate 3 is placed on the support surface, the third magnets 43 and the fourth magnets 44 engage with each other by magnetic attraction. The third magnets 43 and the fourth magnets 44 can also be used to fix the forming substrate 3 vertically, strengthening the connection between the forming substrate 3 and the base 1. In some embodiments, it is also possible to omit the third magnets 43 and the fourth magnets 44 vertically; the forming substrate 3 can simply be placed directly on the support surface under the action of gravity.

[0049] Referring to Figure 6, as an embodiment, the fourth magnet 44 protrudes from the top surface of the base 1, and the height of the protrusion of the fourth magnet 44 is less than the height of the highest point of the support 2. Specifically, the height difference between the protrusion of the fourth magnet 44 and the height of the highest point of the support 2 is only a small value, so the fourth magnet 44 does not contact the forming substrate 3. When the forming substrate 3 is placed on the supporting surface, the third magnet 43 and the fourth magnet 44 are magnetically attracted but not in contact. In this way, it is possible to avoid increasing the contact area of ​​the forming substrate 3 on the supporting surface, but it is also possible to maintain a certain magnetic attraction between the third magnet 43 and the fourth magnet 44.

[0050] Referring to Figure 7, as an embodiment, the base 1 is provided with a groove 11, the inner contour of the groove 11 is adapted to the partial outer contour of the support member 2, and the support member 2 is accommodated in the groove 11. Therefore, when the support member 2 is placed in the groove 11, the groove 11 can limit the support member 2. Specifically, since the support member 2 protrudes from the top surface of the base 1, a part of the support member 2 is located in the groove 11, and the other part is located outside the groove 11. It can be understood that when the support member 2 is a supporting sphere, the role of the groove 11 is particularly important, and the provision of the groove 11 can prevent the supporting sphere from rolling in the lateral direction.

[0051] As an embodiment, in order to reduce the difficulty of processing and ensure that the support structure and the groove fit together without any gap, the groove 11 can be a conical structure and the support member 2 can be a spherical structure.

[0052] 2, 3, and 5, as an embodiment, the 3D printing platform further includes a stopper 5, which is connected to the top of the base 1 and is used to fix the support member 2 in the groove 11. Since the support member 2 is partially located outside the groove 11, the setting of the stopper 5 can prevent the support member 2 from falling out of the groove 11.

[0053] Referring to Figure 7 , as one embodiment, the retaining member 5 is a screw. When the screw is threadedly connected to the top of the base 1, the head of the screw abuts against the outside of the support member 2, securing the support member 2 between the groove 11 and the screw head. This provides a detachable connection between the screw and the base 1. To replace the support member 2, the old support member 2 can be removed by removing the screw, replaced with a new one, and then the screw can be rethreaded into the base 1.

[0054] Referring to Figures 3 and 4, as an embodiment, the base 1 includes a bottom plate 13 and several side plates 14; the bottom plate 13 is connected to several side plates 14 on one side in the X-axis direction, and is connected to several side plates 14 on one side in the Y-axis direction. Several support members 2 are provided on the top of the bottom plate 13, and the side plates 14 protrude from the top surface of the bottom plate 13; the forming substrate 3 is provided with several first magnets 41 in the X-axis and Y-axis directions, and is provided with several second magnets 42 on the side facing the bottom plate, with positions corresponding to the first magnets 41. When the forming substrate 3 is placed on the support surface, the first magnets 41 and the second magnets 42 are magnetically attracted to each other. Therefore, the side plates 14 are provided in the X-axis and Y-axis directions, and the side plates 14 protrude from the top surface of the bottom plate. Specifically, when the forming substrate 3 is placed on the support surface, the side plates 14 can limit the forming substrate 3 in the lateral direction. In addition, the molding substrate 3 is magnetically engaged with the first magnet 41 and the second magnet 42. When the molding substrate 3 is placed on the support surface, the engagement of the first magnet 41 and the second magnet 42 can fix the molding substrate 3 on the support surface, and the magnetic structure can facilitate the replacement of the molding substrate 3.

[0055] In one embodiment, the distance between the top surface of the side panel 14 and the top surface of the bottom panel is a first distance, and the distance between the top surface of the molding substrate 3 and the top surface of the bottom panel is a second distance, where the first distance is smaller than the second distance. As a result, the molding substrate 3 protrudes further from the side panel 14, making it easier for workers to remove and place the molding substrate 3 without interference from the side panel 14.

[0056] Referring to Figures 3 and 4 , as an embodiment, a hollow slot 12 is defined in the center of the base 1, and the area of ​​the molding substrate 3 is larger than the area of ​​the hollow slot 12. Thus, the provision of the hollow slot 12 reduces the material used in the production of the base 1 and reduces its weight. Furthermore, the larger area of ​​the molding substrate 3 than the area of ​​the hollow slot 12 prevents the molding substrate 3 from falling out of the hollow slot 12.

[0057] As an embodiment, the molding substrate 3 includes a first substrate body layer and a second supporting layer for supporting the printed part; the second supporting layer is a diamond-like coating.

[0058] As an embodiment, in order to reduce damage to the molding substrate 3 and improve the quality of the molding substrate, the molding substrate also includes an anti-scratch third layer arranged on the side of the first layer of the substrate body away from the supporting second layer, and the anti-scratch third layer is a diamond-like coating.

[0059] Specifically, the diamond-like coating is deposited on the outer surface of the first layer of the substrate body via vapor deposition. For example, the diamond-like coating can be formed on the outer surface of the first layer of the substrate body via chemical vapor deposition or physical vapor deposition. Vapor deposition helps ensure the uniformity of the diamond-like coating. Therefore, the diamond-like coating applied to the outer surface of the first layer of the substrate body helps ensure that the flatness of the second support layer or the third anti-scratch layer is within an appropriate range, thereby improving printing accuracy.

[0060] In some embodiments, the hardness of the diamond-like carbon coating is a, 2500 HV ≤ a ≤ 4000 HV. For example, the hardness of the diamond-like carbon coating may be 2500 HV, 3000 HV, 3400 HV, 3700 HV, or 4000 HV. When the hardness of the diamond-like carbon coating falls within the above range, it is beneficial to ensure that the diamond-like carbon coating has an appropriate hardness, thereby reducing the probability of scratches.

[0061] In some embodiments, the thickness of the DLC coating along the direction from the first layer of the substrate body to the DLC coating is b, where 4 microns ≤ b ≤ 6 microns. For example, the thickness b of the DLC coating can be 4 microns, 4.5 microns, 5 microns, 5.5 microns, or 6 microns. Controlling the thickness of the DLC coating helps ensure the overall hardness of the DLC and also helps control the flatness of the second support layer and the third anti-scratch layer.

[0062] In some embodiments, the flatness of the second carrier layer or the third anti-scratch layer is ≤ 20 microns. For example, the flatness of the second carrier layer or the third anti-scratch layer can be 2 microns, 5 microns, 8 microns, 10 microns, or 20 microns. When the flatness of the second carrier layer or the third anti-scratch layer falls within the above range, it helps ensure printing accuracy and print quality.

[0063] In one exemplary embodiment, the outer surface of the first layer of the substrate body is a smooth surface with a roughness Ra between 0.1 and 0.4. It is understood that the diamond-like carbon coating is directly applied to the outer surface of the first layer of the substrate body. When the surface of the first layer of the substrate body is smooth, it helps ensure the flatness of the second support layer and the third anti-scratch layer, thereby improving the printing quality of the printer.

[0064] In another exemplary embodiment, the surface of the first layer of the substrate body is a sandblasted surface with a roughness Ra between 0.4 and 0.8, which is beneficial for improving the adhesion between the diamond-like carbon coating and the first layer of the substrate body when the first layer of the substrate body has a certain flatness.

[0065] For the sake of convenience, we refer to the side of the substrate body that carries the second layer and is away from the first layer as the carrying plane.

[0066] Due to the high hardness of the diamond-like coating, the probability of scratches on the support surface is reduced, and the depth of the scratches is controlled, ensuring the flatness of the support surface, thereby improving the precision of the 3D printing device 100 and ensuring the print quality of the printed part. Furthermore, the diamond-like coating is formed directly on the first layer of the substrate body, which not only helps to ensure the flatness of the molding substrate 3, but also helps to ensure the connection area between the diamond-like coating and the first layer of the substrate body, and thus ensure the connection strength between the two.

[0067] In some embodiments, to better illustrate the effectiveness of the embodiments of the present invention in practical applications, relevant performance tests were conducted on different 3D printing platforms. The control group consisted of a 3D printing platform without a diamond-like carbon coating, whose forming substrate had a support surface; the experimental group consisted of a forming substrate 3 according to any embodiment of the present invention.

[0068] a) Comparison of anti-scratch performance

[0069] A utility knife was used to scratch the load-bearing surfaces of the control group and the experimental group with the same force. Finally, under microscope observation, obvious scratches were easily left on the load-bearing surface of the control group, while the scratches on the load-bearing surface of the experimental group became lighter or there were no obvious scratches.

[0070] b) Flatness test

[0071] Laser was used to read the flatness of the load-bearing planes of the control group and the experimental group. It was finally found that the difference between the flatness of the load-bearing plane of the control group and that of the experimental group was within plus or minus 5 microns, and most of them were between -4.4 microns and 1.1 microns. This shows that the flatness of the load-bearing plane of the experimental group is easier to control and it is easier to achieve the flatness required for printing.

[0072] c) Focus test

[0073] Projections were performed on the support surfaces of the control and experimental groups at the same energy intensity, and no significant difference in projection clarity was found between the two groups. Although the image projected onto the support surface of the experimental group was darker at the same energy intensity, this was significantly improved after changing the projection energy intensity.

[0074] d) Adhesion performance test

[0075] ① Four different resins were added to the test group's load-bearing surface. All four resins solidified and bonded to the coating on their respective load-bearing surfaces. This demonstrates that printed parts can be bonded to the test group's load-bearing surface.

[0076] ② Printed parts with narrow bottom and wide top were printed on the supporting surfaces of the control group and the experimental group respectively. When the thickness and area of ​​the layer of contact between the two printed parts and the supporting surface were similar, the maximum heights that the two printed parts could reach before being separated from the printing platform due to the upward pull of the release film were basically the same. This shows that there is no significant difference in the adhesion performance of the supporting surfaces of the control group and the experimental group.

[0077] e) Comparison of sampling difficulty

[0078] Prints were removed from the support surfaces of the control and experimental groups the same number of times. The support surface of the control group was easily scratched, and the prints were difficult to remove and easily broke. However, the support surface of the experimental group had no obvious scratches, and the prints could still be removed relatively easily and intact.

[0079] 8 , a second aspect of the present invention provides a 3D printing device 100 comprising: the 3D printing platform as described above; a leveling mechanism 7 for connecting to a base 1; and a liquid tank 6 for containing a liquid photosensitive material. When the molding substrate 3 is located in the liquid tank 6 , the base 1 at least partially extends outside the liquid tank 6 to connect to the leveling mechanism 7 .

[0080] Specifically, the base 1 can be connected to the leveling mechanism 7 by means of a snap connection or fasteners such as screws or bolts, and the carrying plane can be adjusted to a horizontal state by the leveling mechanism 7. In addition, the 3D printing device 100 can also include a light source module, which is used to irradiate the liquid photosensitive material so that the liquid photosensitive material is solidified on the forming substrate 3. Among them, the forming substrate 3 can move relative to the liquid tank 6. It can be understood that the liquid photosensitive material is placed in the liquid tank 6. When the carrying plane is located in the liquid tank 6, the carrying plane is immersed in the liquid photosensitive material. The light source module of the 3D printing device 100 can irradiate the liquid photosensitive material so that the liquid photosensitive material is solidified on the carrying plane to achieve printing.

[0081] It is understood that the 3D printing device 100 having the aforementioned 3D printing platform also achieves all of its technical benefits. Specifically, the 3D printing platform of the present invention, by placing the molding substrate on top of the base, only needs to be leveled for the initial placement of the molding substrate. When the same molding substrate is placed again, there is no need for re-leveling and it can be used directly. This provides high repeatability and interchangeability, making it more convenient to use and saving time and effort.

[0082] Although the present invention has been specifically described above in conjunction with the accompanying drawings and embodiments, it will be understood that the above description does not limit the present invention in any form. Those skilled in the art may modify and change the present invention as needed without departing from the spirit and scope of the present invention, and these modifications and changes all fall within the scope of the present invention.

Claims

1. A 3D printing platform, wherein: include: Base; At least one supporting member, the supporting member is arranged on the base and protrudes from the top surface of the base, and the top end of the supporting member forms a supporting surface; A molding substrate is placed on the support surface; The platform fixing member is used for detachably connecting the molding substrate to the base.

2. The 3D printing platform according to claim 1, wherein: It comprises at least two staggered support members, at least two of the support members are in line contact with the molding substrate, or at least two of the support members are in line contact and point contact with the molding substrate.

3. The 3D printing platform according to claim 1, wherein: It comprises at least three support members which are arranged in a staggered manner, and at least three of the support members are in point contact with the molding substrate.

4. The 3D printing platform according to claim 3, wherein: Each of the supporting members is a spherical structure.

5. The 3D printing platform according to claim 4, wherein: The invention comprises three supporting members, and the three supporting members are distributed in an axisymmetric manner.

6. The 3D printing platform according to any one of claims 1 to 5, wherein: The molding substrate is magnetically matched with the base through a platform fixing piece.

7. The 3D printing platform according to claim 6, wherein: The platform fixing member includes a first magnet and a second magnet, the molding substrate is provided with a plurality of the first magnets in the directions of the X-axis and the Y-axis, and the base is provided with a plurality of the second magnets in the directions of the X-axis and the Y-axis, the positions of which correspond to the first magnets; When the molded substrate is placed on the supporting surface, the first magnet and the second magnet are magnetically engaged with each other.

8. The 3D printing platform according to claim 6, wherein: The platform fixing member further includes a third magnet and a fourth magnet, a plurality of the third magnets are provided on at least one side of the molding substrate in the direction of the Z axis, and a plurality of the fourth magnets are provided on the top of the base at positions corresponding to the third magnets; When the molding substrate is placed on the supporting surface, the third magnet and the fourth magnet are magnetically matched.

9. The 3D printing platform according to claim 6, wherein: The base is provided with a groove, the inner contour of the groove is matched with the partial outer contour of the support member, and the support member is accommodated in the groove.

10. The 3D printing platform according to claim 9, wherein: The groove is arranged in a conical structure, and the support member is arranged in a spherical structure.

11. The 3D printing platform according to claim 9, wherein: The 3D printing platform also includes a limiting member, which is connected to the top of the base and is used to fix the supporting member in the groove.

12. The 3D printing platform according to claim 6, wherein: The base includes a bottom plate and a plurality of side plates; The bottom plate is connected to a plurality of side plates on one side in the X-axis direction, and the bottom plate is connected to a plurality of side plates on one side in the Y-axis direction. At least one of the support members is provided on The top of the bottom plate, the side plate protrudes from the top surface of the bottom plate; The molding substrate is provided with a plurality of first magnets in the directions of the X-axis and the Y-axis, and a plurality of second magnets corresponding to the positions of the first magnets are provided on the side facing the bottom plate. When the molding substrate is placed on the supporting surface, the first magnets are magnetically attracted to cooperate with the second magnets.

13. The 3D printing platform according to any one of claims 1 to 5, wherein: The molding substrate comprises a first substrate body layer and a second bearing layer for bearing a printed part; the second bearing layer is a diamond-like coating.

14. The 3D printing platform according to claim 13, wherein: The molding substrate further comprises a third anti-knock layer which is arranged on a side of the first layer of the substrate body away from the second bearing layer, and the third anti-knock layer is a diamond-like coating.

15. A 3D printing device, wherein: include: A 3D printing platform as described in any one of claims 1 to 13.

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