Trough and 3D printing equipment

Abstract

According to the trough and the 3D printing equipment, the opening width of the rear end of the opening is larger than that of the front end of the opening, so that flowing of printing materials in a printing space is more uniform, and the phenomenon that the printing effect is affected due to uneven temperature is avoided. According to the technical scheme, a printing space on a trough body is used for containing printing materials, and the two ends of a runner are communicated with the printing space through a space inlet and a space outlet; the driving assembly is used for driving a printing material to flow in the printing space and the runner; at least one of the space inlet and the space outlet is a long-strip-shaped opening extending in the preset direction and comprises an opening front end and an opening rear end which are opposite in the preset direction, and the distance between the opening rear end and the driving assembly on the extending path of the flow channel is larger than the distance between the opening front end and the driving assembly on the extending path of the flow channel. The opening width of the opening rear end is larger than that of the opening front end. The utility model is mainly used for containing printing materials.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, and in particular to a material trough and 3D printing equipment. Background Art

[0002] In light-curing 3D printing, the material tank contains the printing material, and the light source irradiates the printing material with a preset contour from one side of the material tank, so that the printing material between the release film and the printing platform is cured with the preset contour, and then a layer of the model is formed. Then the printing platform rises, so that the formed model is separated from the release film, and the printing material flows back between the model and the release film, and the curing of the next layer of the model continues.

[0003] In the early stage of printing, the temperature of the printing material is low, which affects the uniformity of curing and prolongs the curing time. As the printing process proceeds, the irradiation of the light source and the curing process of the printing material will cause heat accumulation at the curing position. In order to adjust the temperature of the printing material, in the prior art, a flow channel is set on the material trough to drive the printing material to circulate in the flow channel and the printing space, and the printing material is heated or cooled during the circulation of the printing material. The opening connecting the existing flow channel and the printing space has an opening extending in a preset direction, but the width of the opening is uniform in the extension direction. The printing material is affected by the pressure along the process, and part of the printing material is lost, which will cause the opening to be farther away from the dynamic position of the printing material flow, and the flow rate of the printing material will decrease. This will cause the printing material entering the printing space to be uneven, resulting in different temperatures of the printing material in different areas of the printing space, affecting the printing effect. Utility Model Content

[0004] In view of this, in order to solve at least one of the above-mentioned technical problems, an embodiment of the utility model provides a material trough and a 3D printing device.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] On the one hand, an embodiment of the utility model provides a material trough for 3D printing, the material trough comprising:

[0007] A material trough body, on which a printing space, a flow channel, a space inlet and a space outlet are provided. The printing space is used to accommodate printing materials, and two ends of the flow channel are connected to the printing space through the space inlet and the space outlet respectively;

[0008] A driving component, which is used to drive the printing material to circulate in the printing space and the flow channel;

[0009] At least one of the space inlet and the space outlet is a long strip opening extending in a preset direction, and includes an opening front end and an opening rear end relative to each other in the preset direction. The distance between the opening rear end and the driving component on the extension path of the flow channel is greater than the distance between the opening front end and the driving component on the extension path of the flow channel, and the opening width of the opening rear end is greater than the opening width of the opening front end.

[0010] On the other hand, an embodiment of the present invention further provides a 3D printing device, comprising any of the aforementioned material troughs.

[0011] The utility model proposes a material trough and 3D printing equipment, which mainly makes the opening width of the rear end of the opening larger than the opening width of the front end of the opening, thereby making the flow of printing materials in the printing space more uniform, avoiding the influence of uneven temperature on the printing effect. In the prior art, the width of the opening is uniform in the extension direction, and the farther the opening is from the power position of the printing material flow, the smaller the flow rate of printing materials flowing out of the opening, which will cause the printing materials entering the printing space to be uneven, resulting in different temperatures of printing materials in different areas of the printing space, affecting the printing effect. Compared with the prior art, in the present application document, the space entrance and / or space exit are long strip openings extending in a preset direction, and the opening width of the rear end of the opening closer to the driving component is larger, thereby making the printing materials near the rear end of the opening flow more and the opening larger, narrowing the gap in the flow amount of printing materials at different positions in the preset direction, and then making the flow speed of printing materials at different positions in the printing space close to the same, ensuring the temperature uniformity at different positions in the printing space, and ensuring the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the three-dimensional structure of a material trough provided in an embodiment of the utility model;

[0013] Figure 2 A schematic structural diagram of a material trough provided by an embodiment of the utility model at a first viewing angle;

[0014] Figure 3 A schematic structural diagram of a material trough provided by an embodiment of the utility model at a second viewing angle;

[0015] Figure 4 A schematic diagram of the structure of a material trough provided by an embodiment of the utility model at a third viewing angle;

[0016] Figure 5 A schematic diagram of a cross-sectional structure of a material trough provided by an embodiment of the utility model at a second viewing angle;

[0017] Figure 6 for Figure 5 A partial enlarged view of the feed trough in area A is shown;

[0018] Figure 7for Figure 5 A partial enlarged view of the feed trough in area B is shown;

[0019] Figure 8 A schematic cross-sectional structure diagram of a material trough provided in an embodiment of the utility model at a fourth viewing angle;

[0020] Fig. 9 A schematic structural diagram of a partial structure of a material trough provided by an embodiment of the utility model at a fifth viewing angle;

[0021] Fig.10 A schematic diagram of an exploded structure of a partial structure of a trough provided by an embodiment of the utility model;

[0022] Fig.11 A structural schematic diagram of a partial structure of a material trough provided by an embodiment of the utility model at a first viewing angle;

[0023] Fig.12 A schematic structural diagram of a partial structure of a material trough provided in an embodiment of the utility model at a sixth viewing angle. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of a material trough and a 3D printing device proposed according to the utility model in combination with the accompanying drawings and preferred embodiments.

[0025] On the one hand, if Figure 1-Figure 7 As shown, the embodiment of the utility model provides a material trough for 3D printing, and the material trough includes:

[0026] A material tank body 100, on which a printing space 101, a flow channel 102, a space inlet 103 and a space outlet 104 are provided. The printing space 101 is used to accommodate printing materials, and both ends of the flow channel 102 are connected to the printing space 101 through the space inlet 103 and the space outlet 104 respectively;

[0027] A driving component 200, the driving component 200 is used to drive the printing material to circulate in the printing space 101 and the flow channel 102;

[0028] At least one of the space inlet 103 and the space outlet 104 is a long strip opening extending in a preset direction, and includes an opening front end and an opening rear end relative to each other in the preset direction, the distance between the opening rear end and the driving component 200 on the extension path of the flow channel 102 is greater than the distance between the opening front end and the driving component 200 on the extension path of the flow channel 102, and the opening width of the opening rear end is greater than the opening width of the opening front end.

[0029] The trough can be used on a 3D printing device. The printing space 101 of the trough body 100 is used to hold the printing material, which can be a liquid photosensitive resin. The trough body 100 can be placed on the base of the 3D printing device. The printing space 101 has a top opening, and the printing platform of the 3D printing device is opposite to the printing space 101. The printing platform is used to move close to the trough body 100, enter the printing space 101 through the top opening, and then immerse the printing material. The light source on the base projects light of a preset contour to the trough body 100 to solidify the printing material on the printing platform. Then the printing platform is driven to rise, and then the model is separated from the trough body 100, the printing material flows back, and the next printing can be performed. The flow channel 102, the space inlet 103 and the space outlet 104 can all be opened at multiple positions of the trough body 100, such as on the bottom wall or side wall of the printing space 101. For example, the space inlet 103 and the space outlet 104 may be provided on the bottom wall of the printing space 101, and the flow channel 102 may be provided on the bottom wall or the side wall; the space inlet 103 and the space outlet 104 may be provided on the side wall of the printing space 101, and the flow channel 102 may be provided on the bottom wall; or other arrangements may be provided. The driving component 200 may be provided at various positions, and may use various methods to drive the printing material to circulate in the printing space 101 and the flow channel 102, and may drive the printing material to flow by direct contact with the printing material, or may drive the printing material to flow by indirect contact with the printing material, such as by extrusion.

[0030] The space inlet 103 is used for the printing material to enter the printing space 101 from the flow channel 102, and the space outlet 104 is used for the printing material to enter the flow channel 102 from the printing space 101. The space inlet 103 and the space outlet 104 can be openings of the same shape or openings of different shapes. The space inlet 103 and the space outlet 104 can be arranged in a variety of ways according to the specific shape of the trough body 100 and the different printing areas. In some embodiments, the space inlet 103 and / or the space outlet 104 are long strip openings extending in a preset direction to allow the printing material in the printing space 101 to flow in a larger range. For example, taking the space inlet 103 as an example, the two ends of the space inlet 103 in the preset direction are the front end of the opening and the rear end of the opening, respectively. The distance between the front end of the opening and the drive assembly 200 on the extension path of the flow channel 102 refers to the length of the flow channel 102 between the front end of the opening and the drive assembly 200, or the distance of the printing material flow when the printing material flows from the drive assembly 200 to the front end of the opening and is about to enter the printing space 101. The distance between the rear end of the opening and the driving component 200 on the extension path of the flow channel 102 refers to the length of the flow channel 102 from the rear end of the opening to the driving component 200, or in other words, the distance the printing material flows when it flows from the driving component 200 to the rear end of the opening and is about to enter the printing space 101.

[0031] The distance between the rear end of the opening and the driving component 200 on the extension path of the flow channel 102 is greater than the distance between the front end of the opening and the driving component 200 on the extension path of the flow channel 102, that is, the distance that the printing material flows from the driving component 200 to the rear end of the opening is greater than the distance that flows to the front end of the opening. This causes the printing material to suffer more pressure loss along the way when flowing to the rear end of the opening. At the same time, the outflow of the printing material near the front of the opening will further reduce the printing material pressure near the rear end of the opening, which in turn causes a low flow rate of the printing material near the rear end of the opening. By setting the opening width at the rear end of the opening to be larger than the opening width at the front end of the opening, the outflow amount of the printing material at the front end of the opening is reduced, so that more printing material can flow out from the rear end of the opening, and the double weakening of the printing material flow rate and pressure at the rear end of the opening can be balanced to balance the insufficient flow rate at the rear end of the opening, that is, the printing material flows out with a small cross-section and in a fast manner at the front end of the opening, while the printing material flows out with a large cross-section and in a slower manner at the rear end of the opening, thereby narrowing the difference in flow rate between the front end of the opening and the rear end of the opening, so that the printing material can enter the printing space 101 more evenly through the space inlet 103, and / or the printing material can be discharged from the printing space 101 more evenly through the space outlet 104, so that the flow and replacement of the printing material in the printing space 101 are more even, avoiding fast flow of the printing material in some areas, ensuring uniform temperature of the printing material in the printing space 101, and then ensuring uniform molding of the printing material, avoiding heat accumulation in some areas, and ensuring printing accuracy.

[0032] The material trough and 3D printing device proposed in the embodiment of the utility model mainly make the opening width of the rear end of the opening larger than the opening width of the front end of the opening, thereby making the flow of printing materials in the printing space more uniform, and avoiding the influence of uneven temperature on the printing effect. In the prior art, the width of the opening is uniform in the extension direction, and the farther the opening is from the dynamic position of the flow of printing materials, the smaller the flow rate of printing materials flowing out of the opening, which will cause the printing materials entering the printing space to be uneven, resulting in different temperatures of printing materials in different areas of the printing space, affecting the printing effect.

[0033] Compared with the prior art, in the present application document, the space entrance and / or space exit is a long strip opening extending in a preset direction, and the opening width is larger at the rear end of the opening closer to the driving component, thereby making it easier for the printing material near the rear end of the opening to flow out, narrowing the difference in the flow amount of the printing material at different positions in the preset direction, and then making the flow speed of the printing material at different positions in the printing space approach to the same, thereby ensuring uniform temperature at different positions in the printing space and ensuring the printing effect.

[0034] The rule for the opening width to increase from the front end of the opening to the rear end of the opening can be set as needed. For example, if the printing is mainly concentrated in the central area, the rule for the opening width to increase from the front end of the opening to the rear end of the opening can be to increase rapidly first and then increase slowly, thereby ensuring that the flow of the printing material in the middle area of ​​the printing space 101 is faster and the heat can be dissipated quickly. Alternatively, in one embodiment, the opening width increases uniformly from the front end of the opening to the rear end of the opening. For example, taking the direction in actual use as an example, the bottom edge of the space entrance 103 is horizontal, and the top edge of the space entrance 103 extends straight upward from the front end of the opening of the space entrance 103 to the rear end of the opening of the space entrance 103. And / or, the bottom edge of the space outlet 104 is horizontal, and the top edge of the space outlet 104 extends straight upward from the front end of the opening of the space outlet 104 to the rear end of the opening of the space outlet 104.

[0035] In one embodiment, the space inlet 103 and the space outlet 104 are respectively disposed on opposite sides of the trough body 100 .

[0036] The printing material flows in from one side of the printing space 101 and flows out from the opposite side, thereby increasing the flow range of the printing material. In a more specific embodiment, the trough body 100 can be an approximate rectangular parallelepiped structure, and the extension of the trough body 100 in the length direction is greater than the extension in the width direction. The space inlet 103 and the space outlet 104 are respectively arranged on opposite sides of the length direction of the trough body 100, and the preset direction is the width direction of the trough body 100, that is, the space outlet 104 and / or the space inlet 103 extend in the width direction of the trough body 100, and can extend to the inner walls on both sides of the width direction of the printing space 101. The space inlet 103 and the space outlet 104 are arranged on opposite sides of the length direction of the trough body 100. While ensuring the flow range, the extension length of the space inlet 103 and / or the space outlet 104 can be reduced, and the flow difference of the space inlet 103 and / or the space outlet 104 can be reduced.

[0037] In one embodiment, the space outlet 104 has the same shape as the space inlet 103, that is, the space outlet 104 and the space inlet 103 both extend in a preset direction, and respectively include the aforementioned opening front end and opening rear end, and respectively include the aforementioned opening front end and opening rear end. Then, the space outlet 104 and the space inlet 103 cooperate with each other, and the printing material flows into the printing space 101 from the space inlet 103 at a relatively uniform flow rate, and then flows out from the space outlet 104 at a relatively uniform flow rate, and then the flow rate of the printing material between the space inlet 103 and the space outlet 104 is uniform and stable. In the aforementioned embodiment where the space inlet 103 and the space outlet 104 are arranged on opposite sides in the length direction of the trough body 100, the space inlet 103 and the space outlet 104 both extend in the width direction of the trough body 100, and both the space inlet 103 and the space outlet 104 have a relatively uniform flow rate at the space inlet 103 and the space outlet 104, thereby making the flow rate of the printing material in the printing space 101 in the width direction flow more uniformly, thereby increasing the uniformity of the temperature of the printing material.

[0038] Alternatively, in some other embodiments, the shapes of the space outlet 104 and the space inlet 103 are different, such as they can be set according to the shape of the trough body 100 or the printing space 101, and the position of the printing area. For example, the trough body 100 can be an irregular shape, such as the width of the printing space 101 on the side where the space outlet 104 is located is greater than the width of the side where the space inlet 103 is located, and then according to the shape of the printing space 101, the extension length of the space outlet 104 can be set to be greater than the extension length of the space inlet 103. Alternatively, the opening widths of the space outlet 104 and the space inlet 103 can be different, which will not be listed here one by one.

[0039] For the convenience of explanation, the following description is made by taking the space inlet 103 and the space outlet 104 as having the same shape and including the aforementioned features of the front end of the opening and the rear end of the opening respectively.

[0040] In one embodiment, if Figure 4-8The ratio of the extension amount a of at least one of the space inlet 103 and the space outlet 104 in the preset direction to the extension amount d of the printing space 101 in the preset direction is greater than or equal to 0.85 and less than 1. For example, the width d of the release film near the bottom of the printing space 101 is 151 mm, the length e of the release film near the bottom of the printing space 101 is 240 mm, and the height h of the printing space 101 is 37 mm. The extension amount a of the space inlet 103 and the space outlet 104 in the preset direction can be greater than or equal to 130 mm, which can ensure that the space inlet 103 and the space outlet 104 extend long enough to avoid the area near the edge of the width direction of the printing space 101 from not being able to flow or flowing slowly. The extension amount a is less than or equal to 150 mm to adapt to the actual width of the printing space 101. The extension amount a can specifically be 135 mm, 140 mm, 145 mm, or 150 mm.

[0041] In one embodiment, the opening width b at the front end of the opening is greater than or equal to 0.3 mm, which can adapt to the viscosity or fluidity of most printing materials and avoid the printing material being viscous and unable to flow out due to the opening width b being too small. The opening width b at the front end of the opening is less than or equal to 0.7 mm to avoid too much flow rate increasing the performance requirements of the driving component 200 and to avoid the disturbance of the printing material caused by too much flow rate affecting normal printing.

[0042] In one embodiment, the opening width c at the rear end of the opening is greater than or equal to 1.3 mm and less than or equal to 1.7 mm. The opening width c at the rear end of the opening cooperates with the opening width b at the front end of the opening, which not only meets the flow requirements of the printing material, but also achieves the advantages of the opening width at the rear end of the opening being greater than the opening width at the front end of the opening, which will not be described in detail here. For example, the opening width b at the front end of the opening can be 0.3 mm, 0.5 mm, or 0.7 mm, and the opening width c at the rear end of the opening can be 1.3 mm, 1.5 mm, or 1.7 mm.

[0043] It can be understood that the extension amount a of the space entrance 103 in the preset direction, the extension amount a of the space outlet 104 in the preset direction, the opening width b of the front end of the opening, the opening width c of the rear end of the opening, the width d of the printing space 101, the length e of the printing space 101 and the height h of the printing space 101 do not exist independently, but complement each other. When determining the opening width b of the front end of the opening, other parameters can be set to fixed values, and then the printing process is simulated. By adjusting the value of the opening width b of the front end of the opening, the range of the opening width b of the front end of the opening is determined to achieve the desired effect. The parameters together achieve the aforementioned advantages such as ensuring uniform flow of the printing material.

[0044] In one embodiment, the space inlet 103 is disposed on the side wall or the bottom wall of the trough body 100; the space outlet 104 is disposed on the side wall or the bottom wall of the trough body 100. If the space inlet 103 is disposed on the side wall of the trough body 100, the driving burden of the printing material flowing from bottom to top on the bottom wall is avoided. The space outlet 104 is disposed on the bottom wall of the trough body 100, or it can be partially disposed on the bottom wall of the trough body 100 and the other part is disposed on the side wall of the trough body 100, so that the printing material can flow out of the printing space 101 more smoothly, avoiding the problem of slow flow of the printing material near the release film area.

[0045] In another embodiment, the space inlet 103 and the space outlet 104 are both arranged on the side wall of the trough body 100, and the space inlet 103 and the space outlet 104 extend to the bottom wall of the trough body 100. In other words, the edges of the space inlet 103 and the space outlet 104 close to the bottom wall of the trough body 100 are located on the bottom wall of the trough body 100, that is, the bottom edges of the space inlet 103 and the space outlet 104 are horizontal and located on the bottom wall of the trough body 100, while the top edges of the space inlet 103 and the space outlet 104 are inclined, thereby ensuring that the printing material can flow in and out along the bottom wall of the trough body 100, and ensuring the fluidity of the printing material on one side of the release film.

[0046] In one embodiment, at least part of the structure of the driving component 200 is located in the flow channel 102, and the driving component 200 is used to directly contact the printing material to drive the printing material to flow. For example, the driving component 200 can be a driving pump disposed in the flow channel 102, or the driving component 200 includes a magnetically driven power pump and a fan, the fan is disposed in the flow channel 102, the power pump is located outside the flow channel 102, the power pump and the fan are magnetically connected, and the power pump drives the fan to rotate through magnetic force to promote the flow of printing materials.

[0047] Or, in another embodiment, if Figure 9-12 As described, a driving inlet 105 and a driving outlet 106 are also provided on the material trough body 100, and the driving inlet 105 and the driving outlet 106 are both connected to the flow channel 102. The driving component 200 includes a power component and a peristaltic tube 210, and both ends of the peristaltic tube 210 are respectively connected to the flow channel 102 through the driving inlet 105 and the driving outlet 106, and the power component is connected to the peristaltic tube 210 to drive the printing material to flow through the peristaltic tube 210.

[0048] The peristaltic tube 210 indirectly acts on the printing material, avoiding the corrosion of the driving parts caused by direct contact with the printing material, avoiding contamination of the printing material and driving failure. The driving inlet 105 is the opening where the printing material flows from the peristaltic tube 210 into the flow channel 102 and then flows to the space inlet 103, and the driving outlet 106 is the opening where the printing material flows from the flow channel 102 into the peristaltic tube 210. The driving inlet 105 and the driving outlet 106 can only be approximately cylindrical openings, or a guide surface can be set at the edge where the driving inlet 105 and the driving outlet 106 connect the flow channel 102, so that the printing material can enter the driving outlet 106 from the flow channel 102 more easily, or flow out from the driving inlet 105 more easily.

[0049] The distance between the rear end of the opening and the driving assembly 200 on the extension path of the flow channel 102 may be the distance between the rear end of the opening and a preset point on the peristaltic tube 210 on the extension path of the flow channel 102. The distance between the front end of the opening and the driving assembly 200 on the extension path of the flow channel 102 may be the distance between the front end of the opening and a preset point on the peristaltic tube 210 on the extension path of the flow channel 102. The preset point may be the center point of the length of the peristaltic tube 210 or any designated point.

[0050] In one embodiment, the power assembly includes a power member 220, an action wheel 230 and a support member 240, wherein the power member 220 is connected to the support member 240, and the power member 220 is connected to the action wheel 230, and the peristaltic tube 210 abuts against the action wheel 230. The power member 220 is used to drive the action wheel 230 to rotate, so as to intermittently squeeze the peristaltic tube 210 and promote the flow of printing material in the peristaltic tube 210.

[0051] The action wheel 230 is a cam, and may have only one action protrusion in the circumferential direction, or may have two or more action protrusions. Fig.11 As shown, the action wheel 230 includes two action protrusions in the radial direction. When the action wheel 230 rotates, the action protrusions intermittently squeeze and push the peristaltic tube 210 in one direction, thereby causing the printing material in the peristaltic tube 210 to flow to one side. The implementation method of using the peristaltic tube 210 to drive the printing material also has the advantage of being able to drive the printing material in the reverse direction. For example, when the flow channel 102 is blocked, the printing material can be driven in the forward and reverse directions alternately to flush the flow channel 102.

[0052] In one embodiment, the support member 240 includes a bottom plate 241 and a vertical plate 242, the bottom plate 241 is provided with a first conduit 2411 and a second conduit 2412, the bottom plate 241 is connected to the trough body 100, the first conduit 2411 and the second conduit 2412 are respectively connected to the drive inlet 105 and the drive outlet 106, and the peristaltic tube 210 is connected to the first conduit 2411 and the second conduit 2412. The power member 220 is connected to the vertical plate 242, and the bottom plate 241 and the vertical plate 242 are integrally formed.

[0053] The bottom plate 241 is connected to the trough body 100 so that the position of the bottom plate 241 is stable. The bottom plate 241 and the vertical plate 242 are integrally formed, so that the position of the vertical plate 242 is more accurate, and the vertical plate 242 is prevented from being easily installed with position errors, and the position of the power member 220 connected to the vertical plate 242 is accurate, that is, the direction error between the output shaft of the power member 220 and the action wheel 230 is small, so that the peristaltic tube 210 connected to the action wheel 230 is more smoothly wound, and the peristaltic tube 210 is prevented from being skewed, bent, etc., which affects the transmission of printing materials. Two connecting columns can be processed on the bottom plate 241, and the first conduit 2411 and the second conduit 2412 respectively penetrate the connecting column and the bottom plate 241, and the two ends of the peristaltic tube 210 can be sleeved on the connecting column, and then communicated with the first conduit 2411 and the second conduit 2412, so that the disassembly of the peristaltic tube 210 can be convenient.

[0054] In order to ensure that the bottom plate 241 is positioned accurately and stably, in addition to the bolt limiter, the bottom plate 241 and the trough body 100 can also be limited in the following manner. Fig.10 As shown, the trough body 100 is also provided with a first limiting groove 108, which is adapted to at least a portion of the contour of the bottom plate 241, and the driving inlet 105 and the driving outlet 106 are both provided on the inner wall of the first limiting groove 108, and the bottom plate 241 is embedded in the first limiting groove 108, and then the limiting is performed by the action of the side wall and the bottom wall of the first limiting groove 108. In another embodiment, a limiting head 109 is provided on the trough body 100, and a second limiting groove 2413 is provided on the bottom plate 241, and the limiting head 109 is embedded in the second limiting groove 2413, such as the limiting head 109 can be located in the middle position of the length direction of the first limiting groove 108, and then the accuracy of the limiting can be increased.

[0055] In one embodiment, the support member 240 further includes at least one reinforcing rib 244, which is respectively connected to the bottom plate 241 and the vertical plate 242. The reinforcing rib 244 may be approximately triangular, and is provided between the bottom plate 241 and the vertical plate 242 to reinforce the relative position of the bottom plate 241 and the vertical plate 242, thereby increasing the stability of the vertical plate 242 and preventing the vertical plate 242 from vibrating.

[0056] In one embodiment, the support member 240 includes a vertical plate 242 and an action plate 243, the action plate 243 is connected to the vertical plate 242, the action plate 243 is opposite to the action wheel 230, a partial area of ​​the peristaltic tube 210 is located between the action plate 243 and the action wheel 230, and the action plate 243 and the action wheel 230 are used to cooperate in extruding the peristaltic tube 210.

[0057] The action plate 243 may be an arc-shaped plate, and the action plate 243 is used to fix the position of the peristaltic tube 210, to ensure the squeezing force of the action wheel 230 on the peristaltic tube 210, and then to ensure the stability of the transmission flow of the printing material.

[0058] In one embodiment, the Rockwell hardness value of the peristaltic tube 210 using scale A is greater than or equal to 55, and the peristaltic tube 210 has a certain hardness, thereby avoiding deformation and wear caused by the peristaltic tube 210 being too soft, thereby ensuring the durability of the peristaltic tube 210. The Rockwell hardness value of the peristaltic tube 210 using scale A is less than or equal to 65, thereby avoiding the peristaltic tube 210 being too hard to push, avoiding excessive vibration caused by too much thrust when the power assembly contacts and squeezes the peristaltic tube 210, and reducing the performance requirements for the power assembly.

[0059] In one embodiment, the outer diameter of the peristaltic tube 210 is greater than or equal to 9 mm and less than or equal to 10 mm, and the inner diameter of the peristaltic tube 210 is greater than or equal to 6 mm and less than or equal to 7 mm. On the one hand, the wall thickness is ensured to be moderate, which is convenient for the extrusion and pushing of the power component; on the other hand, the flow rate and flow rate of the printing material are ensured to be moderate. For example, the outer diameter of the peristaltic tube 210 is 9 mm, 9.25 mm, 9.75 mm, and the inner diameter of the peristaltic tube 210 is 6 mm, 6.35 mm, 6.75 mm, etc.

[0060] In one embodiment, the power assembly includes a power member 220, which is connected to the action wheel 230. The rotation speed of the power member 220 is greater than or equal to 200 rpm and less than or equal to 280 rpm, such as 220 rpm, 240 rpm, and 260 rpm.

[0061] It is worth noting that the hardness of the peristaltic tube 210, the size of the peristaltic tube 210 and the rotation speed of the power piece 220 are not independent, but are complementary to the extension amount a of the space inlet 103 in the preset direction, the extension amount a of the space outlet 104 in the preset direction, the opening width b of the opening front end, the opening width c of the opening rear end, the width d of the printing space 101, the length e of the printing space 101 and the height h of the printing space 101. For example, the size of the peristaltic tube 210 needs to be set according to the opening width of the space inlet 103 and the space outlet 104, and also needs to be determined according to the rotation speed of the power piece 220. For example, the greater the number of rotations of the power piece 220, the smaller the inner diameter of the peristaltic tube 210.

[0062] In one embodiment, the inner diameter of the peristaltic tube 210 is the same as the inner diameter of the flow channel 102, or the difference between the inner diameter of the peristaltic tube 210 and the inner diameter of the flow channel 102 is within a preset range, and the preset range can be greater than or equal to -0.5 mm and less than or equal to 0.5 mm, thereby avoiding the drop caused by the large difference in the inner diameters of the peristaltic tube 210 and the flow channel 102, and avoiding the printing material from being violently disturbed at the connection position between the peristaltic tube 210 and the flow channel 102, resulting in bubbles, pulsation or unstable flow.

[0063] In one embodiment, the drive assembly 200 further includes a housing 250, and the housing 250 includes a storage space, and the storage space at least stores the power assembly and the peristaltic tube 210 to protect the power assembly and the peristaltic tube 210, to prevent the printing material from splashing and corroding or affecting the movement, and to make the appearance of the material tank more concise. The housing 250 is provided with heat dissipation holes 251, which are connected to the storage space, and the heat dissipation holes 251 can be arranged on opposite sides of the storage space to dissipate heat for the power assembly.

[0064] In one embodiment, a recess 107 is provided on the side wall of the trough body 100, and the recess 107 is used to make room for the liquid level detection component.

[0065] In order to avoid printing failure caused by insufficient printing material, a liquid level detection member can be used to monitor the liquid level of the printing material in real time. The liquid level detection member can be used in a variety of ways, such as the liquid level detection member includes two probes, and the probes are inserted into the printing space 101. A voltage is applied to the probes. When the printing material level is at a higher position, or higher than the lowest liquid level, the bottom end of the probe is inserted into the printing material, and the two probes are connected through the printing material, and then a loop is formed to generate a first liquid level signal. When the printing material is consumed to a level lower than the bottom end of the probe, the probe is separated from the printing material, the loop is disconnected, and a second liquid level signal is generated. Then, the remaining amount of the printing material can be determined according to the change in the signal. The clearance recess 107 is used to at least make way for the probe, or to make way for the probe and the supporting structure connected to the probe corresponding to the partial area of ​​the printing space 101. The two ends of the clearance recess 107 extend to the bottom wall of the material trough body 100 and the top opening edge of the printing space 101 respectively, that is, the probe can be inserted into the printing space 101 from the area surrounded by the clearance recess 107, and then the printing platform can be set according to the width d of the printing space 101 and the length e of the printing space 101. For example, the length and width of the printing platform can be slightly smaller than the length e and width d of the printing space 101, such as 0.5 mm, 1 mm, etc., without being restricted by the probe position, and the printing platform area can be increased, thereby increasing the utilization rate of the printing space 101.

[0066] In one embodiment, the recess 107 may be an arc-shaped recess to prevent the printing material from piling up, or a square recess. The cross section of the area enclosed by the recess 107 may be uniform in the direction perpendicular to the release film. The recess 107 may be a single one or two, that is, the recesses 107 are respectively provided for the two probes.

[0067] On the other hand, an embodiment of the utility model further provides a 3D printing device, including any of the aforementioned material troughs, including the advantages of any of the aforementioned material troughs, which will not be repeated here.

[0068] The utility model also provides the following implementation modes:

[0069] Reference numeral 1: A material trough for 3D printing, the material trough comprising:

[0070] A material tank body 100, on which a printing space 101, a flow channel 102, a space inlet 103 and a space outlet 104 are provided. The printing space 101 is used to accommodate printing materials, and both ends of the flow channel 102 are connected to the printing space 101 through the space inlet 103 and the space outlet 104 respectively;

[0071] A driving component 200, the driving component 200 is used to drive the printing material to circulate in the printing space 101 and the flow channel 102;

[0072] At least one of the space inlet 103 and the space outlet 104 is a long strip opening extending in a preset direction, and includes an opening front end and an opening rear end relative to each other in the preset direction, the distance between the opening rear end and the driving component 200 on the extension path of the flow channel 102 is greater than the distance between the opening front end and the driving component 200 on the extension path of the flow channel 102, and the opening width of the opening rear end is greater than the opening width of the opening front end.

[0073] Reference numeral 2, a trough according to reference numeral 1, wherein:

[0074] The opening width increases uniformly from the front end of the opening to the rear end of the opening.

[0075] Reference numeral 3, a trough according to reference numeral 1, wherein:

[0076] The space inlet 103 and the space outlet 104 are respectively disposed on opposite sides of the trough body 100;

[0077] Alternatively, the space inlet 103 and the space outlet 104 are respectively arranged on opposite sides of the trough body 100 in the length direction, and the preset direction is the width direction of the trough body 100 .

[0078] Reference numeral 4, a trough according to reference numeral 1, wherein:

[0079] The ratio of the extension amount a of at least one of the space entrance 103 and the space exit 104 in the preset direction to the extension amount d of the printing space 101 in the preset direction is greater than or equal to 0.85 and less than 1;

[0080] and / or, the opening width b at the front end of the opening is greater than or equal to 0.3 mm and less than or equal to 0.7 mm;

[0081] And / or, the opening width c at the rear end of the opening is greater than or equal to 1.3 mm and less than or equal to 1.7 mm.

[0082] Reference numeral 5. A trough according to reference numeral 1, wherein:

[0083] The space entrance 103 is disposed on the side wall or the bottom wall of the trough body 100;

[0084] And / or, the space outlet 104 is disposed on the side wall or the bottom wall of the trough body 100;

[0085] And / or, the space inlet 103 and the space outlet 104 are both disposed on the side wall of the trough body 100 , and the space inlet 103 and the space outlet 104 extend to the bottom wall of the trough body 100 .

[0086] Reference number 6. A trough according to reference number 1, wherein:

[0087] The space outlet 104 has the same shape as the space inlet 103;

[0088] Alternatively, the space outlet 104 and the space inlet 103 have different shapes;

[0089] Reference numeral 7. A trough according to reference numeral 1, wherein:

[0090] At least part of the structure of the driving component 200 is located in the flow channel 102, and the driving component 200 is used to directly contact the printing material to drive the printing material to flow;

[0091] Alternatively, the trough body 100 is further provided with a driving inlet 105 and a driving outlet 106, both of which are in communication with the flow channel 102, and the driving assembly 200 includes a power assembly and a peristaltic tube 210, both ends of the peristaltic tube 210 are in communication with the flow channel 102 through the driving inlet 105 and the driving outlet 106, respectively, and the power assembly is connected to the peristaltic tube 210, so as to drive the printing material to flow through the peristaltic tube 210;

[0092] The distance between the rear end of the opening and the driving assembly 200 on the extension path of the flow channel 102 is the distance between the rear end of the opening and a preset point on the peristaltic tube 210 on the extension path of the flow channel 102;

[0093] The distance between the front end of the opening and the driving assembly 200 on the extension path of the flow channel 102 is the distance between the front end of the opening and a preset point on the peristaltic tube 210 on the extension path of the flow channel 102 .

[0094] Reference numeral 8. A trough according to reference numeral 7, wherein:

[0095] The power assembly includes a power member 220, an action wheel 230 and a support member 240, the power member 220 is connected to the support member 240, and the power member 220 is connected to the action wheel 230, and the peristaltic tube 210 is in contact with the action wheel 230;

[0096] The power member 220 is used to drive the action wheel 230 to rotate, so as to intermittently squeeze the peristaltic tube 210 and promote the flow of the printing material in the peristaltic tube 210;

[0097] The action wheel 230 is a cam.

[0098] Reference numeral 9. A trough according to reference numeral 8, wherein:

[0099] The support member 240 includes a bottom plate 241 and a vertical plate 242. The bottom plate 241 is provided with a first conduit 2411 and a second conduit 2412. The bottom plate 241 is connected to the trough body 100. The first conduit 2411 and the second conduit 2412 are respectively connected to the driving inlet 105 and the driving outlet 106. The peristaltic tube 210 is connected to the first conduit 2411 and the second conduit 2412.

[0100] The power member 220 is connected to the vertical plate 242 , and the bottom plate 241 and the vertical plate 242 are integrally formed.

[0101] Reference numeral 10. A trough according to reference numeral 9, wherein:

[0102] The trough body 100 is also provided with a first limiting groove 108, which is adapted to at least a portion of the contour of the bottom plate 241, and the driving inlet 105 and the driving outlet 106 are both provided on the inner wall of the first limiting groove 108, and the bottom plate 241 is embedded in the first limiting groove 108;

[0103] And / or, a limiting head 109 is disposed on the trough body 100 , a second limiting groove 2413 is opened on the bottom plate 241 , and the limiting head 109 is embedded in the second limiting groove 2413 .

[0104] Reference numeral 11. A trough according to reference numeral 9, wherein:

[0105] The support member 240 further includes at least one reinforcing rib 244 , and the reinforcing rib 244 is respectively connected to the bottom plate 241 and the vertical plate 242 .

[0106] Reference numeral 12. A trough according to reference numeral 8, wherein:

[0107] The support member 240 includes a vertical plate 242 and an action plate 243. The action plate 243 is connected to the vertical plate 242. The action plate 243 is opposite to the action wheel 230. A partial area of ​​the peristaltic tube 210 is located between the action plate 243 and the action wheel 230. The action plate 243 and the action wheel 230 are used to cooperate in extruding the peristaltic tube 210.

[0108] Reference number 13. A trough according to reference number 7, wherein:

[0109] The Rockwell hardness value of the peristaltic tube 210 when using scale A is greater than or equal to 55 and less than or equal to 65;

[0110] and / or, the outer diameter of the peristaltic tube 210 is greater than or equal to 9 mm and less than or equal to 10 mm, and the inner diameter of the peristaltic tube 210 is greater than or equal to 6 mm and less than or equal to 7 mm;

[0111] And / or, the power assembly includes a power member 220, the power member 220 is connected to the action wheel 230, and the rotation speed of the power member 220 is greater than or equal to 200 rpm and less than or equal to 280 rpm;

[0112] And / or, the inner diameter of the peristaltic tube 210 is the same as the inner diameter of the flow channel 102, or the difference between the inner diameter of the peristaltic tube 210 and the inner diameter of the flow channel 102 is within a preset range.

[0113] Reference number 14. A trough according to reference number 7, wherein:

[0114] The driving assembly 200 further includes a housing 250, and the housing 250 includes a receiving space, and the receiving space at least receives the power assembly and the peristaltic tube 210;

[0115] The housing 250 is provided with a heat dissipation hole 251 , which is communicated with the accommodation space.

[0116] Reference number 15. A trough according to reference number 1, wherein:

[0117] A recess 107 is also provided on the side wall of the trough body 100, and the recess 107 is used to make room for the liquid level detection component.

[0118] Reference number 16. A trough according to reference number 15, wherein:

[0119] The recess 107 is an arc-shaped recess.

[0120] Label 17. A 3D printing device, comprising a material trough as described in any one of labels 1-16.

[0121] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A material trough for 3D printing, characterized in that: The trough comprises: A material trough body, wherein a printing space, a flow channel, a space inlet and a space outlet are provided on the material trough body, wherein the printing space is used to accommodate printing materials, and two ends of the flow channel are respectively connected to the printing space through the space inlet and the space outlet; A driving component, the driving component is used to drive the printing material to circulate in the printing space and the flow channel; At least one of the space inlet and the space outlet is a long strip opening extending in a preset direction, and includes an opening front end and an opening rear end relative to each other in the preset direction, the distance between the opening rear end and the driving component on the extension path of the flow channel is greater than the distance between the opening front end and the driving component on the extension path of the flow channel, and the opening width of the opening rear end is greater than the opening width of the opening front end.

2. The trough according to claim 1, characterized in that: The opening width increases uniformly from the front end of the opening to the rear end of the opening.

3. The trough according to claim 1, characterized in that: The space inlet and the space outlet are respectively arranged on opposite sides of the trough body; Alternatively, the space inlet and the space outlet are respectively arranged on opposite sides of the length direction of the trough body, and the preset direction is the width direction of the trough body.

4. The trough according to claim 1, characterized in that: A ratio of an extension amount a of at least one of the space inlet and the space outlet in the preset direction to an extension amount d of the printing space in the preset direction is greater than or equal to 0.85 and less than 1; And / or, the opening width b at the front end of the opening is greater than or equal to 0.3 mm and less than or equal to 0.7 mm; And / or, the opening width c at the rear end of the opening is greater than or equal to 1.3 mm and less than or equal to 1.7 mm.

5. The trough according to claim 1, characterized in that: The space entrance is arranged on the side wall or the bottom wall of the trough body; And / or, the space outlet is arranged on the side wall or bottom wall of the trough body; And / or, the space inlet and the space outlet are both arranged on the side wall of the trough body, and the space inlet and the space outlet extend to the bottom wall of the trough body.

6. The trough according to claim 1, characterized in that: The space exit has the same shape as the space entrance; Alternatively, the space outlet and the space inlet have different shapes.

7. The trough according to claim 1, characterized in that: At least part of the structure of the driving component is located in the flow channel, and the driving component is used to directly contact the printing material to drive the printing material to flow; Alternatively, the material trough body is further provided with a driving inlet and a driving outlet, both of which are in communication with the flow channel, the driving assembly includes a power assembly and a peristaltic tube, both ends of the peristaltic tube are in communication with the flow channel through the driving inlet and the driving outlet, respectively, and the power assembly is connected to the peristaltic tube to drive the printing material to flow through the peristaltic tube; The distance between the rear end of the opening and the driving assembly on the extension path of the flow channel is the distance between the rear end of the opening and a preset point on the peristaltic tube on the extension path of the flow channel; The distance between the front end of the opening and the driving assembly on the extension path of the flow channel is the distance between the front end of the opening and a preset point on the peristaltic tube on the extension path of the flow channel.

8. The trough according to claim 7, characterized in that: The power assembly comprises a power member, an action wheel and a support member, the power member is connected to the support member, the power member is connected to the action wheel, and the peristaltic tube abuts against the action wheel; The power member is used to drive the action wheel to rotate so as to intermittently squeeze the peristaltic tube and promote the printing material in the peristaltic tube to flow; The action wheel is a cam.

9. The trough according to claim 8, characterized in that: The support member includes a bottom plate and a vertical plate, the bottom plate is provided with a first conduit and a second conduit, the bottom plate is connected to the trough body, the first conduit and the second conduit are communicated with the drive inlet and the drive outlet respectively, and the peristaltic tube is communicated with the first conduit and the second conduit; The power member is connected to the vertical plate, and the bottom plate and the vertical plate are integrally formed.

10. The trough according to claim 9, characterized in that: The trough body is also provided with a first limiting groove, the first limiting groove is adapted to at least a part of the contour of the bottom plate, the driving inlet and the driving outlet are both provided on the inner wall of the first limiting groove, and the bottom plate is embedded in the first limiting groove; And / or, a limiting head is arranged on the material trough body, a second limiting groove is opened on the bottom plate, and the limiting head is embedded in the second limiting groove.

11. The trough according to claim 9, characterized in that: The support member further includes at least one reinforcing rib, and the reinforcing rib is respectively connected to the bottom plate and the vertical plate.

12. The trough according to claim 8, characterized in that: The support member includes a vertical plate and an action plate, the action plate is connected to the vertical plate, the action plate is opposite to the action wheel, a partial area of ​​the peristaltic tube is located between the action plate and the action wheel, and the action plate and the action wheel are used to cooperate to squeeze the peristaltic tube.

13. The trough according to claim 7, characterized in that: The Rockwell hardness value of the peristaltic tube using scale A is greater than or equal to 55 and less than or equal to 65; And / or, the outer diameter of the peristaltic tube is greater than or equal to 9 mm and less than or equal to 10 mm, and the inner diameter of the peristaltic tube is greater than or equal to 6 mm and less than or equal to 7 mm; And / or, the power assembly includes a power member, and the rotation speed of the power member is greater than or equal to 200 rpm and less than or equal to 280 rpm; And / or, the inner diameter of the peristaltic tube is the same as the inner diameter of the flow channel, or the difference between the inner diameter of the peristaltic tube and the inner diameter of the flow channel is within a preset range.

14. The trough according to claim 7, characterized in that: The driving assembly further comprises a housing, wherein the housing comprises a containing space, and the containing space at least contains the power assembly and the peristaltic tube; The shell is provided with a heat dissipation hole, and the heat dissipation hole is communicated with the accommodating space.

15. The trough according to claim 1, characterized in that: A recess is also provided on the side wall of the trough body, and the recess is used to make way for the liquid level detection component.

16. The trough according to claim 15, characterized in that: The recessed recess is an arc-shaped recess.

17. A 3D printing device, characterized in that: Comprising the trough described in any one of claims 1-16.

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