Photocuring 3D printing liquid level detection device and equipment

Abstract

The utility model relates to the technical field of 3D printing, and discloses a photocuring 3D printing liquid level detection device and equipment, the liquid level detection device comprises a floating block, the floating block is used for floating on the surface of a liquid level to be detected, and the upper surface of the floating block is parallel to the surface of the liquid level to be detected; the detection panel is arranged on the upper surface of the floating block in an embedded mode, and the detection panel is used for reflecting light emitted by the liquid level sensor. The liquid level height value is indirectly obtained through the detection face arranged on the surface of the floating block so that the liquid level height value can be used by projection equipment on 3D printing, the influence of liquid fluctuation of resin on liquid level detection can be effectively reduced, the operability and repeatability of liquid level detection of transparent resin are improved, and the stability of the liquid level height detected by the liquid level sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a light-curing 3D printing liquid level detection device and equipment. Background Art

[0002] Stereolithography 3D printing is a process that uses ultraviolet light or other light beams to cure photosensitive polymer materials, such as photosensitive resins, to form the desired shape. Stereolithography can be divided into top projection and bottom projection according to the position of the light source. The bottom projection light source is at the bottom, and the molding surface is located at the bottom of the resin tank and the middle part of the molding platform. It is a constrained molding. For top projection, the molding surface is located on the liquid surface, so for top projection light curing technology, it is a non-constrained molding. The control of the liquid level is particularly important for the molding quality and printing stability of the sample.

[0003] At present, the liquid level is detected by directly irradiating the resin liquid surface with a liquid level sensor and obtaining the liquid level value through liquid surface reflection. However, due to the long-term storage of resin, sedimentation and stratification will occur. The sediment in the resin may have different refractive indices, which will cause the optical properties of the liquid to change. The liquid surface reflection distance obtained by the liquid level sensor will be affected by refraction, etc., resulting in unstable liquid level value detected by the liquid level sensor. Utility Model Content

[0004] In view of this, the utility model provides a light-curing 3D printing liquid level detection device and equipment to solve the problem in the prior art that when the resin undergoes precipitation and stratification, the liquid level detected by the liquid level sensor is unstable.

[0005] In a first aspect, the utility model provides a light-curing 3D printing liquid level detection device, the light-curing 3D printing liquid level detection device comprising:

[0006] A floating block, the floating block is used to float on the surface of the liquid to be measured, wherein the upper surface of the floating block is parallel to the surface of the liquid to be measured;

[0007] The detection panel is embedded on the upper surface of the floating block, and is used for reflecting the light emitted by the liquid level sensor.

[0008] In this embodiment, the liquid level height value is indirectly obtained by setting a detection surface on the surface of the floating block for use in the projection device on 3D printing, which can effectively reduce the impact of liquid fluctuations of the resin on liquid level detection and increase the operability and repeatability of transparent resin liquid level detection.

[0009] In an optional embodiment, the liquid level detection device further includes:

[0010] The counterweight block is connected to the bottom of the floating block through a connecting rope, and the floating block floats on the surface of the liquid to be measured under the action of the counterweight block.

[0011] In this embodiment, a counterweight block is connected to the bottom of the floating block, and the buoyancy can be adjusted by adjusting the counterweight block. Compared with adjusting the buoyancy by adjusting the floating block, it has higher flexibility and lower cost.

[0012] In an optional embodiment, the liquid level detection device further includes:

[0013] The limiting frame includes a frame body, a hanging buckle and a handle. The frame body is integrally connected with the hanging buckle and the handle. The frame body is used to place the floating block. The hanging buckle is used to buckle on the frame of the container for containing the liquid to be tested, so that the frame body is placed in the container.

[0014] In this embodiment, the floating block is placed in the limiting frame to prevent the floating block from sinking to the bottom when the resin is replaced, which would cause the detection panel on the upper surface of the floating block to be contaminated, thereby improving the accuracy of liquid level detection.

[0015] In an optional embodiment, a raised base is provided at the bottom of the floating block, and the base is used to fix the connecting rope.

[0016] In this embodiment, a base for fixing the connecting rope is provided at the bottom of the floating block, which not only facilitates the installation of the connecting rope, but also prevents the connecting rope from falling off, thereby ensuring the reliability of the liquid level detection device.

[0017] In an optional embodiment, a through hole is opened at the bottom of the limiting frame, and the through hole is used to allow the base of the floating block to pass through.

[0018] In this embodiment, a through hole matched with the base of the floating block is opened at the bottom of the limit frame, so that the floating block can fully sink to the bottom of the limit frame and increase the range of liquid level detection.

[0019] In an optional embodiment, the surface of the buoyant block is coated with a thin film.

[0020] This can reduce the bonding damping between the liquid level detection device and the resin and improve the sensitivity of the floating block to the fluctuation of the resin liquid level.

[0021] In an optional embodiment, the liquid level to be measured is the liquid level of the resin.

[0022] The liquid level detection device provided in this embodiment can not only detect the liquid level of the transparent layer after precipitation, but also detect the normal resin liquid level. It has a wide range of applications and does not need to be used when abnormal liquid level detection occurs, which can effectively avoid additional operations.

[0023] In an optional embodiment, the liquid level to be measured is the liquid level of a transparent layer laminated on the precipitation layer after the resin is precipitated.

[0024] The liquid level detection device provided in this embodiment can not only detect the normal resin liquid level, but also detect the transparent layer liquid level after precipitation. It has a wide range of applications and can effectively reduce the impact of resin liquid fluctuations on liquid level detection, thereby increasing the operability and repeatability of transparent resin liquid level detection.

[0025] In an optional implementation, the flatness of the detection panel is not higher than 0.01 mm.

[0026] This can make the detection panel close to an ideal plane, thereby improving the accuracy of liquid level detection.

[0027] In a second aspect, the utility model provides a light-curing 3D printing device, which includes the liquid level detection device in any one of the above-mentioned embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the composition of a specific example of a light-curing 3D printing liquid level detection device according to an embodiment of the utility model;

[0030] Figure 2 is a top view of a liquid level detection device according to an embodiment of the utility model;

[0031] Figure 3 is a liquid level detection curve obtained after the detection is performed without using the liquid level detection device provided in this embodiment;

[0032] Figure 4 It is a liquid level detection curve obtained after detection by the liquid level detection device according to the embodiment of the utility model;

[0033] Figure 5 It is a schematic diagram of placing a floating block in a frame according to an embodiment of the utility model;

[0034] Figure 6 It is a right side view of a liquid level detection device according to an embodiment of the utility model;

[0035] Figure 7It is a front view of a liquid level detection device according to an embodiment of the utility model;

[0036] Explanation of the reference numerals: 1-floating block, 11-base, 2-detection panel, 3-counterweight block, 31-connecting rope, 4-limiting frame, 41-frame, 42-hanging buckle, 43-handle. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Since resin will precipitate and stratify after long-term storage, when the resin liquid surface precipitates and stratifies, the liquid surface reflection distance obtained by the liquid level sensor will be affected by refraction, etc., resulting in unstable measured liquid level value. In addition, for transparent resin, the liquid level sensor may not be able to read the liquid level value, or the liquid level sensor needs to be adjusted to a specific angle to obtain the liquid level value, which greatly increases the difficulty of operability and repeatability.

[0042] In view of this, a light-curing 3D printing liquid level detection device is provided in this embodiment, which can be used to detect the liquid level of the liquid to be tested in the resin tank, that is, the liquid level to be tested, wherein the liquid level to be tested includes the resin liquid level and the transparent layer liquid level laminated on the precipitation layer after the resin is precipitated. Figure 1 1 is a schematic structural diagram of a light-curing 3D printing liquid level detection device according to an embodiment of the utility model. The liquid level detection device includes a floating block 1 and a detection panel 2, and is specifically as follows.

[0043] The floating block 1 is used to float on the surface of the liquid to be measured, wherein the upper surface of the floating block 1 is parallel to the surface of the liquid to be measured, that is, the upper surface of the floating block 1 is horizontal with the surface of the liquid to be measured. Specifically, the floating block 1 can be designed to meet the buoyancy of the liquid to be measured such as resin or transparent liquid, so that the upper surface of the floating block 1 is parallel to the surface of the liquid to be measured, and the floating block 1 can be made of wood, rubber and other materials.

[0044] The detection panel 2 is embedded in the upper surface of the floating block 1, wherein the upper surface of the detection panel 2 is level with the upper surface of the floating block 1, and the detection panel 2 can be a glass panel, a plastic panel, etc., which is used to reflect the light emitted by the liquid level sensor, and then the liquid level sensor is used to determine the liquid level height of the liquid to be measured according to the received reflected light. Figure 2 The figure shows a top view of the liquid level detection device.

[0045] That is, the main function of the floating block 1 is to make it float on the surface of the liquid to be tested. A detection panel 2 is installed on the upper surface of the floating block 1 to replace the liquid surface to be tested to reflect the light irradiated by the liquid level sensor, thereby avoiding the problem of unstable liquid level value detected by the liquid level sensor due to sedimentation and stratification caused by long-term placement of the resin.

[0046] like Figure 3 As shown in FIG. 1 , the liquid level detection curve obtained after the liquid level detection device provided in this embodiment is not used for detection. It can be seen that due to the influence of refraction, the detected liquid level is highly unstable, and the liquid level detection curve has occasional mutations and is not smooth. Figure 4As shown in the figure, it is a liquid level detection curve detected by the liquid level detection device provided in this embodiment. It can be seen that the liquid level detection curve is extremely stable, smooth and continuous, without any abnormal or sudden change. Therefore, the liquid level detection device provided in this embodiment reduces the problem of sensor misreading and overshoot caused by liquid level fluctuation, reduces the misreading problem caused by colored resin precipitation, and increases the readability and operation repeatability of transparent resin liquid level. In other words, the liquid level detection device provided in this embodiment can effectively solve the problem of unstable liquid level height detected by the liquid level sensor when the resin precipitation and stratification phenomenon occurs.

[0047] In this embodiment, the liquid level height value is indirectly obtained by setting a detection surface on the surface of the floating block for use in the projection device on 3D printing, which can effectively reduce the impact of liquid fluctuations of the resin on liquid level detection and increase the operability and repeatability of transparent resin liquid level detection.

[0048] Reference Figure 1 As shown, in some optional embodiments, the liquid level detection device further includes:

[0049] The counterweight block 3 is connected to the lower side of the floating block 1 through a connecting rope 31 . The floating block 1 floats on the surface of the liquid to be measured under the action of the counterweight block 3 .

[0050] In this embodiment, the floating block 1 can be floated on the surface of the liquid to be measured by equipping the counterweight block 3. At this time, the floating block 1 can be made of foam and other materials, and the counterweight block 3 can be made of rubber, wood and other materials, so that the floating block 1 sinks under the action of the counterweight block 3. The counterweight block 3 can be an inverted cone structure, and of course it can also be a rectangular parallelepiped, a cube and other structures, which are not specifically limited here. When the light-curing 3D printing material used is resin, the weight of the counterweight block 3 is about 50g.

[0051] In this embodiment, the counterweight block 3 is connected to the bottom of the floating block 1, and the buoyancy can be adjusted by adjusting the counterweight block 3. Compared with adjusting the buoyancy by adjusting the floating block 1, it has higher flexibility and lower cost.

[0052] Reference Figure 1 , Figure 5 , Figure 6 As shown, in some optional embodiments, the liquid level detection device further includes:

[0053] The limiting frame 4 includes a frame body 41, a hanging buckle 42 and a handle 43. The frame body 41 is integrally connected with the hanging buckle 42 and the handle 43 respectively. The frame body 41 is used to place the floating block 1. The hanging buckle 42 is used to buckle on the frame of the container for containing the liquid to be tested, so that the frame body 41 can be placed in the container for containing the liquid to be tested.

[0054] You can refer to Figure 5 As shown, it is a schematic diagram of placing the floating block 1 in the frame 41, and then the hanging buckle 42 of the limit frame 4 can be buckled on the frame of the container, such as the frame of the resin tank. When the resin tank is filled with resin, the floating block 1 can float up and down in the frame 41 as the resin liquid level or the transparent layer liquid level rises and falls. The setting of the handle 43 can facilitate the operation of taking and installing the limit frame 4 to improve the safety of operation.

[0055] In this embodiment, the floating block 1 is placed in the limiting frame 4 to prevent the floating block 1 from sinking to the bottom when the resin is replaced, causing the detection panel 2 on the upper surface of the floating block 1 to be contaminated, thereby improving the accuracy of liquid level detection.

[0056] Reference Figure 7 As shown, in some optional embodiments, a raised base 11 is provided at the bottom of the floating block 1 , and the base 11 is used to fix the connecting rope 31 .

[0057] In this embodiment, a base 11 for fixing the connecting rope 31 is provided at the bottom of the floating block 1, which not only facilitates the installation of the connecting rope 31, but also prevents the connecting rope 31 from falling off, thereby ensuring the reliability of the liquid level detection device.

[0058] In some optional embodiments, a through hole is opened at the bottom of the limiting frame 4, and the through hole is used to allow the base 11 of the floating block 1 to pass through.

[0059] In this embodiment, a through hole matching the base 11 of the floating block 1 is opened at the bottom of the limiting frame 4, so that the floating block 1 can fully sink to the bottom of the limiting frame 4 and increase the range of liquid level detection.

[0060] In some optional embodiments, the surface of the buoyant block 1 is coated with a thin film.

[0061] Specifically, the outer surfaces of the limit frame 4, the counterweight block 3 and the floating block 1 can be subjected to surface coating treatment, which can reduce the bonding damping between the liquid level detection device and the resin and improve the sensitivity of the floating block 1 to the fluctuation of the resin liquid level.

[0062] In some optional embodiments, the liquid level to be measured is the liquid level of the resin.

[0063] The liquid level detection device provided in this embodiment can not only detect the liquid level of the transparent layer after precipitation, but also detect the normal resin liquid level. It has a wide range of applications and does not need to be used when abnormal liquid level detection occurs, which can effectively avoid additional operations.

[0064] In some optional embodiments, the liquid level to be measured is the liquid level of a transparent layer laminated on the precipitation layer after the resin is precipitated.

[0065] The liquid level detection device provided in this embodiment can not only detect the normal resin liquid level, but also detect the transparent layer liquid level after precipitation, and has a wide range of applications. It can also effectively reduce the impact of resin liquid fluctuations on liquid level detection and increase the operability and repeatability of transparent resin liquid level detection.

[0066] In some optional embodiments, the flatness of the detection panel 2 is not higher than 0.01 mm.

[0067] The detection panel 2 installed on the upper surface of the floating block 1 is a precision-machined part, and the flatness requirement is not higher than 0.01 mm, so that the detection panel 2 can be close to the ideal plane to improve the accuracy of liquid level detection.

[0068] In this embodiment, a light-curing 3D printing device is also provided, including the light-curing 3D printing liquid level detection device in any one of the above-mentioned embodiments.

[0069] The description of the light-curing 3D printing liquid level detection device can refer to any of the above-mentioned embodiments, which will not be repeated here.

[0070] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A light-curing 3D printing liquid level detection device, characterized in that: The liquid level detection device comprises: A floating block (1), the floating block (1) being used to float on the surface of a liquid level to be measured, wherein the upper surface of the floating block (1) is parallel to the surface of the liquid level to be measured; A detection panel (2) is embedded in the upper surface of the floating block (1), and the detection panel (2) is used to reflect light emitted by the liquid level sensor.

2. The liquid level detection device according to claim 1, characterized in that: The liquid level detection device also includes: The counterweight block (3) is connected to the bottom of the floating block (1) via a connecting rope (31); the floating block (1) floats on the surface of the liquid to be measured under the action of the counterweight block (3).

3. The liquid level detection device according to claim 1, characterized in that: The liquid level detection device also includes: A limit frame (4), the limit frame (4) comprising a frame body (41), a hanging buckle (42) and a handle (43), the frame body (41) being integrally connected with the hanging buckle (42) and the handle (43), the frame body (41) being used to place the floating block (1), the hanging buckle (42) being used to buckle on the frame of a container for containing a liquid to be tested, so that the frame body (41) is placed in the container.

4. The liquid level detection device according to claim 2, characterized in that: A raised base (11) is provided at the bottom of the floating block (1), and the base (11) is used to fix the connecting rope (31).

5. The liquid level detection device according to claim 3, characterized in that: A through hole is provided at the bottom of the limiting frame (4), and the through hole is used to allow the base (11) of the floating block (1) to pass through.

6. The liquid level detection device according to claim 1, characterized in that: The surface of the floating block (1) is coated with a thin film.

7. The liquid level detection device according to claim 1, characterized in that: The liquid level to be measured is the liquid level of the resin.

8. The liquid level detection device according to claim 1, characterized in that: The liquid surface to be measured is the liquid surface of the transparent layer laminated on the precipitation layer after the resin is precipitated.

9. The liquid level detection device according to claim 1, characterized in that: The flatness of the detection panel (2) is not higher than 0.01 mm.

10. A light-curing 3D printing device, characterized in that , comprising the liquid level detection device as described in any one of claims 1 to 9.

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