Resin tank and additive manufacturing apparatus

Abstract

The application discloses a resin tank and a laminated manufacturing device, which mainly heats or cools resin flowing in a molding space through a flow channel and a power assembly, so that the problem of uneven heating or cooling is avoided.The technical scheme of the application is as follows: the resin tank comprises a resin tank main body, the resin tank main body comprises a molding space, the molding space is used for accommodating resin, a flow channel is arranged on the resin tank main body and is communicated with the molding space; a temperature control assembly comprises a power assembly and a temperature control piece, the power assembly is used for directly or indirectly acting on the resin to drive the resin to circularly flow in the molding space and the flow channel, and the temperature control piece is used for heating or cooling the resin in the flow channel.The application is mainly used for laminated manufacturing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of additive manufacturing equipment, in particular to a resin tank and additive manufacturing equipment. BACKGROUND

[0002] The additive manufacturing equipment is also called a three-dimensional printer, which is a kind of machine of a cumulative manufacturing technology, i.e. a kind of machine of a rapid prototyping technology. The principle of the additive manufacturing equipment is that data and raw materials are put into the additive manufacturing equipment, and the machine will manufacture a product layer by layer according to a program. In the light-curing additive manufacturing, the resin tank containing resin is placed above a light source, the light source installs slice data of a model to project a curing light with a specific contour to the resin tank, and the curing light will make the resin in the resin tank be cured according to the specific contour after passing through a release film of the resin tank, so as to form a first layer of the product, and the printing platform is raised to realize three-dimensional printing layer by layer.

[0003] The temperature of the resin has a direct influence on the printing effect, and low temperature of the resin will lead to uneven curing, resulting in holes and distortion of the model, and long curing time of a single layer of the model. In the prior art, a heating element is arranged on the tank to directly heat the resin contained in the tank, such as the patent with the publication number CN205467374U, which discloses a light-curing 3D printer heating tank. The side wall of the resin tank is a metal plate, a plurality of heating holes are arranged on the side wall of the resin tank, and a heating rod is inserted into the heating holes to heat the resin in the resin tank through the side wall of the resin tank. The resin is heated by the side wall of the resin tank, and the temperature of the resin near the side wall is high, while the temperature of the center area for curing and forming is low, so that the resin is not uniformly heated. SUMMARY

[0004] Therefore, the present application provides a resin tank and additive manufacturing equipment, which mainly solve the problem of uneven change of the temperature of the resin.

[0005] To achieve the above-mentioned purpose, the present application mainly provides the following technical solutions:

[0006] In one aspect, the present application provides a resin tank for additive manufacturing, which comprises:

[0007] A resin tank body, the resin tank body comprising a molding space for containing resin, and a flow channel being arranged on the resin tank body and being in communication with the molding space;

[0008] A temperature control assembly, the temperature control assembly comprising a power assembly and a temperature control element, the power assembly being used for directly or indirectly acting on the resin to drive the resin to flow circularly in the molding space and the flow channel, and the temperature control element being used for heating or cooling the resin in the flow channel.

[0009] The temperature control assembly further comprises a temperature measuring assembly for detecting the temperature of the resin.

[0010] The resin tank body is provided with a discharging opening and a feeding opening, and the two ends of the flow channel are communicated with the molding space through the discharging opening and the feeding opening respectively;

[0011] The discharging opening and the feeding opening are respectively located on opposite sides of the resin tank body;

[0012] The resin tank further comprises a filter element, which is connected with the resin tank body and covers the feeding opening.

[0013] The resin tank body comprises a frame body and a release film assembly, the frame body is provided with a flow channel groove, the release film assembly is connected with the frame body, the release film assembly and the flow channel groove enclose at least part of the flow channel, and the frame body and the release film assembly enclose a molding space;

[0014] The frame body is provided with a first notch and a second notch, the release film assembly and the first notch enclose a discharging opening, the release film assembly and the second notch enclose a feeding opening, and the discharging opening and the feeding opening correspond to the bottom of the molding space.

[0015] The release film assembly comprises a release film and a fixing ring, the release film is connected with the fixing ring, the resin tank body further comprises a sealing ring, the fixing ring is connected with the frame body, and the sealing ring is located between the fixing ring and the frame body.

[0016] The resin tank body is further provided with a feeding hole and a discharging hole, the feeding hole and the discharging hole are both communicated with the flow channel, and the temperature control assembly further comprises a peristaltic tube, the two ends of the peristaltic tube are communicated with the flow channel through the feeding hole and the discharging hole respectively;

[0017] The power assembly is abutted with the peristaltic tube, and is used for pushing the resin to flow by extruding the peristaltic tube.

[0018] The power assembly comprises a driver, an extrusion wheel and a fixing plate, the driver is connected with the extrusion wheel, the fixing plate is oppositely arranged with the extrusion wheel, and part of the peristaltic tube is located between the fixing plate and the extrusion wheel;

[0019] The extrusion wheel is used for extruding the peristaltic tube in different degrees in cooperation with the fixing plate, and the driver is used for driving the extrusion wheel to rotate so as to push the resin in the peristaltic tube;

[0020] The extrusion wheel is a cam.

[0021] The temperature control assembly further comprises a temperature measuring assembly, and the temperature measuring assembly is used for detecting the temperature of the resin;

[0022] The temperature measuring assembly comprises a heat conduction element and a first temperature measuring element, the heat conduction element is provided with a first conduction hole and a second conduction hole, the heat conduction element is connected with the resin tank body, the first conduction hole and the second conduction hole correspond to the feeding hole and the discharging hole respectively, one end of the peristaltic tube is communicated with the feeding hole through the first conduction hole, and the other end of the peristaltic tube is communicated with the discharging hole through the second conduction hole.

[0023] The first temperature measuring member is connected with the heat conducting member and is used for detecting the temperature of the heat conducting member.

[0024] The temperature control assembly further comprises a heat insulation seat;

[0025] The heat insulation seat is connected with the grease groove body, the heat conducting member is connected with the heat insulation seat, the first conducting hole and the second conducting hole correspond to the third conducting hole and the fourth conducting hole respectively, one end of the peristaltic tube is communicated with the feeding hole through the first conducting hole and the third conducting hole, and the other end of the peristaltic tube is communicated with the discharging hole through the second conducting hole and the fourth conducting hole.

[0026] The flow channel comprises a first sub-flow channel and a second sub-flow channel, one end of the first sub-flow channel is communicated with the molding space, the other end of the first sub-flow channel is communicated with the discharging hole, one end of the second sub-flow channel is communicated with the molding space, and the other end of the second sub-flow channel is communicated with the feeding hole;

[0027] The temperature control member is opposite to the second sub-flow channel and is located between the feeding hole and the position where the second sub-flow channel is communicated with the molding space;

[0028] The depth of the second sub-flow channel in the direction perpendicular to the bottom surface of the resin groove body is greater than the depth of the first sub-flow channel in the direction perpendicular to the bottom surface of the resin groove body;

[0029] The length of the second sub-flow channel in the resin flow direction is greater than the length of the first sub-flow channel in the resin flow direction.

[0030] The resin groove body is further provided with a temperature control member cavity, the temperature control member cavity is separated from the flow channel by a heat conducting sealing layer with a preset thickness, the temperature control member is located in the temperature control member cavity, and the resin in the flow channel is heated through the heat conducting sealing layer;

[0031] The resin groove body comprises a frame body and a heat conducting sealing cylinder, the frame body is provided with a mounting space opening and a mounting space, the mounting space is communicated with the flow channel through the mounting space opening, the heat conducting sealing cylinder comprises a temperature control member cavity, the heat conducting sealing cylinder is located in the mounting space, part of the heat conducting sealing cylinder is located in the flow channel, and the outer wall of the heat conducting sealing cylinder abuts against the side wall corresponding to the mounting space opening, and the heat conducting sealing layer is a region of the heat conducting sealing cylinder side wall located in the flow channel;

[0032] The temperature control assembly further comprises a second temperature measuring member, the second temperature measuring member is used for directly or indirectly detecting the temperature of the temperature control member, and the resin groove body is provided with a heat dissipation fin.

[0033] The resin groove body comprises a frame body and a support seat, the support seat is connected with the frame body, the power assembly is connected with the support seat, the frame body and the support seat are integrally formed, or the frame body and the support seat are detachably connected;

[0034] The resin tank further comprises a cover body configured to be connected to the support base and cover the driving member.

[0035] In another aspect, the present application also provides a resin tank for additive manufacturing, comprising any of the above.

[0036] The resin tank and additive manufacturing equipment provided by the present application mainly heat or cool the resin in the molding space by setting the flow channel and the power assembly, thereby avoiding the problem of uneven heating or cooling. In the prior art, a heating member is arranged on the tank to directly heat the resin in the tank. The temperature of the resin near the heating member is high, while the temperature of the center area for curing and molding is low, and the resin is unevenly heated. Compared with the prior art, in the present application, the power assembly drives the resin to circulate between the molding space and the flow channel. The original resin enters the flow channel, is heated or cooled by the temperature control member, and then flows back to the molding space. Since the resin in the molding space continuously flows, the resin with changed temperature will flow to the center area for curing, so that the temperature of the resin in the molding space is uniform, and the flow of the resin can avoid the accumulation of heat generated during the curing process in the curing area, thereby avoiding the problem of excessive local temperature affecting the performance of the display screen and the curing effect. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A structure diagram of the resin tank provided by the present application is shown in the figure.

[0038] Figure 2 A first partial structure diagram of the resin tank provided by the present application is shown in the figure.

[0039] Figure 3 A first cross-sectional structure diagram of the resin tank provided by the present application is shown in the figure.

[0040] Figure 4 A first partial structure explosion diagram of the resin tank provided by the present application is shown in the figure.

[0041] Figure 5 A second partial structure diagram of the resin tank provided by the present application is shown in the figure.

[0042] Figure 6 A second partial structure explosion diagram of the resin tank provided by the present application is shown in the figure.

[0043] Figure 7 A Figure 6 A local enlarged view of the resin tank shown in the figure.

[0044] Figure 8 A second cross-sectional structure diagram of the resin tank provided by the present application is shown in the figure. DETAILED DESCRIPTION

[0045] To further illustrate the technical means and effects taken by the present application to achieve the predetermined object of the present application, the specific embodiments, structures, features and effects of a resin tank and a layer manufacturing equipment according to the present application are described in detail as follows in combination with the drawings and preferred embodiments.

[0046] In one aspect, as shown in Figures 1-4 The present application provides a resin tank for layer manufacturing, which comprises:

[0047] The resin tank body 100 comprises a molding space for accommodating resin, and a flow channel 111 is formed on the resin tank body 100 and communicates with the molding space.

[0048] The temperature control assembly 200 comprises a power assembly 210 and a temperature control member 220. The power assembly 210 is used to directly or indirectly act on the resin to drive the resin to circulate and flow in the molding space and the flow channel 111. The temperature control member 220 is used to heat or cool the resin in the flow channel 111.

[0049] The resin tank body 100 is a tank structure, including a molding space, the molding space containing resin, the bottom of the molding space being transparent for light transmission. During printing, the printing platform is immersed in the molding space, and light is transmitted through the bottom of the molding space to irradiate the resin, so that the resin below the printing platform is solidified. The flow channel 111 can be provided at multiple positions of the resin tank body 100, such as on the bottom wall or the side wall, and the two ends of the flow channel 111 are in communication with the molding space through openings in the inner wall of the molding space. The power assembly 210 can be provided at multiple positions and can drive the resin to circulate in the molding space and the flow channel 111 in multiple ways, and can be in direct contact with the resin to drive the resin to flow. For example, the power assembly 210 can be a water pump provided in the flow channel 111, or can be a magnetic transmission power pump, the fan of the power pump being provided in the flow channel 111, and the motor being located outside the flow channel 111, the motor and the fan being magnetically connected, and the fan being driven to rotate by magnetic force to push the resin to flow. Alternatively, the power assembly 210 can also not be in contact with the resin. The temperature control member 220 is used for heat exchange with the resin, and can be used for cooling the resin or heating the resin. For convenience of description, the temperature control member 220 is used for heating the resin as an example. The temperature control member 220 can heat the resin in the flow channel 111, and the heated resin flows into the molding space, and continues to flow in the molding space, so that the heated resin flows into the solidification area located in the center of the molding space, and the low-temperature resin flows out, and when local high temperature is generated during solidification, the flow of the resin in the molding space can make the high-temperature resin flow out of the solidification area, avoiding excessive heat accumulation. In some embodiments, the temperature control member 220 can also heat the resin outside the flow channel 111, and then the heated resin flows back to the molding space through the flow channel 111. When the temperature control member 220 heats the resin in the flow channel 111, the temperature control member 220 can exchange heat with the resin in the flow channel 111 in multiple ways, such as being connected to the resin tank body 100 to heat the resin in the flow channel 111 through the resin tank body 100, or being directly provided in the flow channel 111 to heat the resin by directly contacting the resin.

[0050] It can be understood that the flow channel 111 of the present application is a flow channel 111 provided on the resin tank body 100, and is not a containing space in another container different from the resin tank body 100. The overall shape of the flow channel 111 can be long strip-shaped, extending around the outer periphery of the molding space according to the contour of the molding space, and the flow channel 111 can be processed by using the side wall of the resin tank body 100. Because the flow channel 111 is long and narrow in shape, on the one hand, it avoids occupying a large space and affecting the overall shape of the resin tank body 100, and on the other hand, it makes the resin in the flow channel 111 more closely contact the temperature control member 220, so that the heating is more effective, and the temperature of the resin in the flow channel 111 behind the temperature control member 220 in the flow direction is more uniform.

[0051] The resin tank and the additive manufacturing equipment provided by the embodiment of the present application mainly heat or cool the resin flowing in the molding space by setting the flow channel and the power assembly, thereby avoiding the problem of uneven heating or cooling. In the prior art, the resin in the tank is directly heated by setting a heating element on the tank, and the temperature of the resin near the heating element is high, while the temperature of the center area for curing and molding is low, and the resin is unevenly heated. Compared with the prior art, in the present application, the power assembly drives the resin to circulate between the molding space and the flow channel, the original resin enters the flow channel, and then flows back to the molding space after being heated or cooled by the temperature control element. Since the resin continuously flows in the molding space, the resin with changed temperature will flow to the center area for curing, so that the temperature of the resin in the molding space is uniform, and the flow of the resin can avoid the accumulation of heat generated during the curing process in the curing area, thereby avoiding the problem of excessively high local temperature affecting the performance of the display screen and the curing effect.

[0052] In an embodiment, the temperature control assembly 200 further comprises a temperature measuring assembly 240 for detecting the temperature of the resin. The temperature measuring assembly 240 can be multiple, and can be arranged on the resin tank body 100 or at any position on the resin flow path. The temperature control assembly 200 can be directly in contact with the resin, such as being arranged on the inner wall of the molding space for directly contacting the resin to detect the temperature of the resin in the molding space. Alternatively, the temperature control assembly 200 can be arranged in the flow channel 111 to directly contact the resin in the flow channel 111 to measure the temperature. Alternatively, a heat conducting element can be arranged on the resin flow path without directly contacting the resin, and the temperature of the heat conducting element is detected to indirectly measure the temperature of the resin. The temperature measuring assembly 240 and the temperature control element 220 are electrically connected to the main controller of the additive manufacturing equipment. The temperature measuring assembly 240 is used to feed back the temperature information of the resin, and the main controller controls whether the temperature control element 220 continues to heat according to the temperature of the resin, thereby realizing constant temperature regulation of the resin.

[0053] In an embodiment, the resin tank body 100 is provided with a discharge opening 112 and a feeding opening 113, and the two ends of the flow channel 111 are communicated with the molding space through the discharge opening 112 and the feeding opening 113, respectively. The discharge opening 112 and the feeding opening 113 are located on opposite sides of the resin tank body 100, specifically on the two sides in the length direction of the molding space. The discharge opening 112 and the feeding opening 113 are long strip-shaped openings extending in the width direction of the molding space, so that the resin flows into one side of the molding space and flows out from the opposite side, and the resin flowing range in the molding space is larger, and the flowing path directly passes through the center molding area, thereby avoiding local high temperature caused by accumulation of resin in the molding area.

[0054] In an embodiment, the resin tank further comprises a filter 300 connected with the resin tank body 100 and covering the feeding opening 113.

[0055] The filter 300 is used to filter the resin flowing in the molding space, so as to avoid the agglomerated resin or impurities from entering the flow channel 111 and affecting the smooth flow of the resin. The filter 300 can be a filter plate with holes, which is connected to the resin tank body 100 by bolts.

[0056] In an embodiment, the resin tank body 100 includes a frame 110 and a release film assembly 120. The frame 110 is provided with a flow channel groove 114. The release film assembly 120 is connected to the frame 110, and the release film assembly 120 and the flow channel groove 114 enclose at least part of the flow channel 111. The frame 110 and the release film assembly 120 enclose the molding space. The frame 110 is provided with a first notch and a second notch. The release film assembly 120 and the first notch enclose the discharge opening 112. The release film assembly 120 and the second notch enclose the feeding opening 113. The discharge opening 112 and the feeding opening 113 correspond to the bottom of the molding space.

[0057] More specifically, the release film assembly 120 includes a release film 121 and a fixing ring 122. The release film 121 is connected to the fixing ring 122. The frame 110 includes a fixing ring groove. The fixing ring 122 is embedded in the fixing ring groove, and is connected to the frame 110 by bolts connecting the groove bottom of the fixing ring groove. The release film 121 abuts against the opening edge of the flow channel groove 114. In the embodiment including the filter 300, the filter 300 covers the second notch, and the release film 121 abuts against the filter 300. The discharge opening 112 and the feeding opening 113 are located at the bottom end of the molding space, i.e., the bottom end of the discharge opening 112 and the feeding opening 113 is located at the bottom end of the molding space. The resin close to the release film 121 can flow into the flow channel 111 through the feeding opening 113 smoothly, and the resin flowing out of the flow channel 111 can be discharged into the molding space from the position close to the release film 121 through the discharge opening 112, so that the resin flow close to the release film 121 is more sufficient, and the accumulation of solidification heat is further avoided. In some embodiments, for example, the bottom end of the frame 110 used to connect the release film includes a bottom frame region extending toward the center. The discharge opening 112 and / or the feeding opening 113 are at least partially provided on the top surface of the bottom frame region. The top surface of the release film is coplanar with or slightly lower than the top surface of the bottom frame region, so that the resin corresponding to the release film can flow to the flow channel 111 through the feeding opening 113 more completely, and the resin flowing out of the flow channel 111 can also be supplemented to the molding space by the release film through the discharge opening 112, so as to ensure that the resin flow close to the release film is sufficient.

[0058] Further, in order to avoid the resin from leaking through the gap between the frame 110 and the release film 121, for example, Figure 4As shown, the resin tank body 100 further comprises a sealing ring 130 located between the fixing ring 122 and the frame 110. The sealing ring 130 can be a rubber ring. An annular sealing ring groove 118 can be formed on the outer periphery of the fixing ring groove of the frame 110, the sealing ring 130 is embedded in the sealing ring groove 118 and partially protrudes from the sealing ring groove 118, and the fixing ring 122 presses the sealing ring 130 to seal the gap between the fixing ring 122 and the frame 110.

[0059] The power assembly 210 can drive the resin flow by directly contacting the resin in the flow channel 111, such as a fan, or can also guide the resin out of the flow channel 111 by an external pipeline to drive the resin flow in a non-contact pushing manner. In one embodiment, as shown in Figure 2 、 Figures 5-8 As shown, the resin tank body 100 further comprises an inlet hole 115 and an outlet hole 116, both of which are in communication with the flow channel 111. The temperature control assembly 200 further comprises a peristaltic tube 230, both ends of which are in communication with the flow channel 111 through the inlet hole 115 and the outlet hole 116. The power assembly 210 abuts against the peristaltic tube 230 to push the resin flow by pressing the peristaltic tube 230. The power assembly 210 comprises a driver, a pressing wheel 211 and a fixing plate 212, the driver is connected with the pressing wheel 211, the fixing plate 212 is oppositely arranged with the pressing wheel 211, and part of the peristaltic tube 230 is located between the fixing plate 212 and the pressing wheel 211. The pressing wheel 211 is used to press the peristaltic tube 230 with different degrees in cooperation with the fixing plate 212, and the driver is used to drive the pressing wheel 211 to rotate to push the resin in the peristaltic tube 230.

[0060] The fixed plate 212 is detachably connected with the resin tank body 100. The feeding hole 115 and the discharging hole 116 are specifically the top surface of the resin tank body 100 in use. The peristaltic tube 230 is elastically deformable and can be a rubber hose. The peristaltic tube 230 can be connected to the resin tank body 100 by a hose joint. The driver can be fixed on the resin tank body 100, and the pressing wheel 211 is a cam. The cam can be an integral whole or can include circumferentially spaced rollers. The edges of the plurality of rollers form a non-concentric circle, i.e., the edges of the plurality of rollers form a cam, and the side walls of the rollers are used to abut the peristaltic tube 230. The driver drives the pressing wheel 211 to rotate, and each roller alternately presses the peristaltic tube 230. The rollers roll from one end of the peristaltic tube 230 connected to the feeding hole 115 to the other end of the peristaltic tube 230 connected to the discharging hole 116 to periodically push the resin in the peristaltic tube 230 to flow in the form of peristalsis. The peristaltic tube 230 is used to push the resin to flow, avoiding the need to set a larger accommodation space for the power assembly 210 to be installed directly in contact with the resin. The power assembly 210 is connected to the resin tank body 100 to avoid resin leakage at the connection position, and the power assembly 210 directly contacts the resin to avoid resin contamination and foaming.

[0061] In the embodiment in which the temperature control assembly 200 includes the temperature measuring assembly 240, the temperature measuring assembly 240 is installed in the forming space and exposed to the outside, which is easy to be damaged. The temperature measuring assembly 240 is installed in the flow channel 111, which is insufficient in space and complex to install. The temperature measuring assembly 240 is directly in contact with the liquid resin, which is easy to cause chemical pollution and affect the temperature measuring performance. When the power assembly 210 pushes the resin to flow through the peristaltic tube 230, the resin in the flow channel 111 needs to be introduced out to the peristaltic tube 230, so the indirect temperature measurement of the resin can be performed before the resin flows out of the flow channel 111 and into the peristaltic tube 230. Specifically, the temperature measuring assembly 240 includes a heat conduction member 241 and a first temperature measuring member 242. The heat conduction member 241 is connected with the resin tank body 100 and has a first conduction hole 243 and a second conduction hole 244. The first conduction hole 243 and the second conduction hole 244 correspond to the feeding hole 115 and the discharging hole 116, respectively. One end of the peristaltic tube 230 communicates with the feeding hole 115 through the first conduction hole 243, and the other end of the peristaltic tube 230 communicates with the discharging hole 116 through the second conduction hole 244. The first temperature measuring member 242 is connected with the heat conduction member 241 and is used to detect the temperature of the heat conduction member 241.

[0062] The heat conducting member 241 can be a metal heat conducting member. The heat conducting member 241 is fixed on the top surface of the resin tank main body 100, and the peristaltic tube 230 is connected to the heat conducting member 241 by a hose joint. The heat conducting member 241 is provided with a hole, and the first temperature measuring member 242 is inserted into the hole. The resin in the flow channel 111 flows out through the discharge hole 116, enters the peristaltic tube 230 through the second conducting hole 244, and then flows back to the flow channel 111 through the first conducting hole 243 and the feeding hole 115. When passing through the first conducting hole 243 and the second conducting hole 244, the resin exchanges heat with the heat conducting member 241, so that the temperature of the heat conducting member 241 is equal to or only slightly different from the temperature of the resin. The first temperature measuring member 242 indirectly detects the temperature of the resin by detecting the temperature of the heat conducting member 241, and then generates temperature information that can be received by the host controller.

[0063] To avoid the heat of the temperature control member 220 being directly transmitted to the heat conducting member 241 through the resin tank main body 100, in an embodiment, the temperature control assembly 200 further comprises a heat insulation seat 250. The heat insulation seat 250 is provided with a third conducting hole 251 and a fourth conducting hole 252, and is connected to the resin tank main body 100. The heat conducting member 241 is connected to the heat insulation seat 250. The first conducting hole 243 and the second conducting hole 244 correspond to the third conducting hole 251 and the fourth conducting hole 252 respectively. One end of the peristaltic tube 230 communicates with the feeding hole 115 through the first conducting hole 243 and the third conducting hole 251, and the other end of the peristaltic tube 230 communicates with the discharge hole 116 through the second conducting hole 244 and the fourth conducting hole 252.

[0064] The heat insulation seat 250 is fixed on the top surface of the resin tank main body 100, and the heat conducting member 241 is fixed on the heat insulation seat 250. The resin in the flow channel 111 flows out through the discharge hole 116, enters the peristaltic tube 230 through the fourth conducting hole 252 and the second conducting hole 244, and then flows back to the flow channel 111 through the third conducting hole 251, the first conducting hole 243 and the feeding hole 115. The temperature of the heat conducting member 241 is not affected by the temperature control member 220, and can more accurately reflect the temperature of the flowing resin.

[0065] To avoid the resin flowing back from the feeding opening 113 to the discharge opening 112 in the flow channel 111, reducing the flow of the peristaltic tube 230, in an embodiment, the flow channel 111 comprises a first sub-flow channel and a second sub-flow channel. One end of the first sub-flow channel communicates with the molding space, specifically through the feeding opening 113. The other end of the first sub-flow channel communicates with the discharge hole 116. One end of the second sub-flow channel communicates with the molding space, specifically through the discharge opening 112. The other end of the second sub-flow channel communicates with the feeding hole 115. The temperature control member 220 is opposite to the second sub-flow channel and is located between the feeding hole 115 and the position where the second sub-flow channel communicates with the molding space, i.e. between the feeding hole 115 and the discharge opening 112.

[0066] The resin enters the second sub-flow channel through the feed hole 115 in the peristaltic tube 230, exchanges heat with the temperature control piece 220 on the path to the discharge opening 112, and after warming up, flows into the molding space through the discharge opening 112. It can be understood that the first sub-flow channel and the second sub-flow channel are not directly connected. In the embodiment in which the resin tank main body 100 includes the frame body 110 and the release film assembly 120, the release film assembly 120 includes the release film 121 and the fixing ring 122, the flow channel groove 114 includes the first sub-flow channel groove 1141 and the second sub-flow channel groove 1142, the release film 121 abuts against the opening edge of the first sub-flow channel groove 1141 and encloses the first sub-flow channel groove 1141 to form the first sub-flow channel, and the release film 121 abuts against the opening edge of the second sub-flow channel groove 1142 and encloses the second sub-flow channel groove 1142 to form the second sub-flow channel. The temperature control piece 220 is opposite to the second sub-flow channel, so that the temperature detected by the first temperature measuring piece 242 is the temperature of the resin in the molding space, rather than the temperature of the resin after heating, so that the temperature detection more accurately reflects the actual temperature of the resin in the molding space.

[0067] The temperature control piece 220 can directly contact the resin for heating, or can indirectly heat, avoiding resin leakage and resin easily deposited on the surface of the temperature control piece 220 to affect the heating efficiency caused by the direct contact between the temperature control piece and the resin. In one embodiment, the resin tank main body 100 is further provided with a temperature control piece cavity 141, and the temperature control piece cavity 141 is spaced from the flow channel 111 by a heat-conducting sealing layer with a predetermined thickness, specifically, the temperature control piece cavity 141 is spaced from the second sub-flow channel by the heat-conducting sealing layer. The temperature control piece 220 is located in the temperature control piece cavity 141 and heats the resin in the second sub-flow channel through the heat-conducting sealing layer.

[0068] The temperature control piece cavity 141 and the second sub-flow channel are located on both sides of the heat-conducting sealing layer, and the temperature control piece 220 can be a metal heating rod inserted into the temperature control piece cavity 141 and abutting against the inner wall of the temperature control piece cavity 141. In order to increase the heat conduction effect of the heat-conducting sealing layer, in one embodiment, the resin tank main body 100 includes the frame body 110 and a heat-conducting sealing cylinder 140, the frame body 110 is provided with a mounting space opening and a mounting space, the mounting space is in communication with the flow channel 111 through the mounting space opening, the heat-conducting sealing cylinder 140 includes the temperature control piece cavity 141, the heat-conducting sealing cylinder 140 is located in the mounting space, part of the heat-conducting sealing cylinder 140 is located in the flow channel 111, and the outer wall of the heat-conducting sealing cylinder 140 abuts against the side wall corresponding to the mounting space opening, and the heat-conducting sealing layer is the region of the heat-conducting sealing cylinder 140 whose side wall is located in the flow channel 111.

[0069] The heat-conducting sealing tube 140 can be made of a material containing a heat-conducting metal such as copper, iron, nickel, etc. The heat-conducting sealing tube 140 is inserted into the installation space and passes through the opening portion of the installation space in the second sub-flow channel. The side wall of the heat-conducting sealing tube 140 in the second sub-flow channel becomes a partial area of the side wall of the second sub-flow channel. The resin flowing through the second sub-flow channel can be in contact with the heat-conducting sealing tube 140 to exchange heat, so that the temperature control component 220 can heat the resin in the second sub-flow channel through the side wall of the heat-conducting sealing tube 140. The outer wall of the heat-conducting sealing tube 140 abuts against the edge of the opening of the installation space to seal and prevent resin leakage. In some other embodiments, as shown in FIG. 8, the depth of the second sub-flow channel in the direction perpendicular to the bottom surface of the resin tank main body 100, or in other words, the direction perpendicular to the release film 121, is greater than the depth of the first sub-flow channel in the direction perpendicular to the release film 121. This can increase the area of the heat-conducting sealing tube 140 in the second sub-flow channel and increase the heating area, so that the resin flowing through the heat-conducting sealing tube 140 can be heated faster. In some embodiments, the length of the second sub-flow channel in the resin flow direction is greater than the length of the first sub-flow channel in the resin flow direction, so that the heated resin can have sufficient flow distance for uniform heating, so that the resin entering the molding space from the flow channel 111 has uniform temperature. Figure 3

[0070] In an embodiment, the temperature control assembly 200 further includes a second temperature measuring component 260 for directly or indirectly measuring the temperature of the temperature control component 220. The second temperature measuring component 260 can be arranged in the installation space and abut against the heat-conducting sealing tube 140 to measure the temperature of the temperature control component 220 to monitor whether the temperature control component 220 is working normally.

[0071] In some embodiments, the resin tank main body 100 includes a frame 110 and a support base 150. The support base 150 is connected to the frame 110, and the power assembly 210 is connected to the support base 150. The frame 110 and the support base 150 are integrally formed, or the frame 110 and the support base 150 can be detachably connected.

[0072] The support base 150 is a hollow structure. The drive in the power assembly 210 is located in the cavity of the support base 150. The rotating shaft of the drive extends out of the top opening of the support base 150. The extrusion wheel 211 is connected to the rotating shaft, and the fixing plate 212 is connected to the top plate of the support base 150. The support base 150 can be integrally formed with the frame 110 or detachably connected. When resin heating is not needed, the support base 150 and the power assembly 210 can be detached to facilitate the use of the resin tank. It can be understood that in the foregoing embodiments, the feeding hole 115, the discharging hole 116, the installation space, and the temperature control component 220 are all arranged on the frame 110. In the embodiments including the heat insulation seat 250 and the temperature measuring assembly 240, the heat insulation seat 250 is fixed on the frame 110.

[0073] ​Further, the resin tank further comprises a cover body 400, which is used to be connected to the support base 150, so as to cover the driving member 210, and is used to protect the extrusion wheel 211 and the peristaltic tube 230.

[0074] The resin tank body 100 is provided with heat dissipation fins, which can accelerate heat dissipation when the resin is overheated. The heat dissipation fins can be arranged on the outer wall of the resin tank body 100 corresponding to the flow channel 111.

[0075] On the other hand, the embodiment of the present application further provides a layer manufacturing equipment, which comprises the resin tank of any one of the preceding embodiments and a base; the resin tank is connected to the base.

[0076] The layer manufacturing equipment comprises the resin tank, and has all the advantages of the resin tank.

[0077] The present application further provides the following embodiments:

[0078] In one aspect, the embodiment of the present application provides a resin tank for layer manufacturing, which comprises:

[0079] The resin tank body 100 comprises a forming space for accommodating resin, and is provided with a flow channel 111, which is in communication with the forming space; the temperature control assembly 200 comprises a driving assembly 210 and a temperature control member 220, the driving assembly 210 is used to directly or indirectly act on the resin to drive the resin to circulate and flow in the forming space and the flow channel 111, and the temperature control member 220 is used to heat or cool the resin in the flow channel 111.

[0080] 2. The resin tank according to 1, wherein the temperature control assembly 200 further comprises a temperature measuring assembly 240 for detecting the temperature of the resin; the resin tank body 100 is provided with a discharge opening 112 and a feeding opening 113, and the two ends of the flow channel 111 are in communication with the forming space through the discharge opening 112 and the feeding opening 113 respectively; the discharge opening 112 and the feeding opening 113 are respectively located on the opposite sides of the resin tank body 100; the resin tank further comprises a filter 300, which is connected to the resin tank body 100 and covers the feeding opening 113.

[0081] 3. The resin tank according to 2, wherein the resin tank body 100 comprises a frame 110 and a release film assembly 120, the frame 110 is provided with a flow channel groove 114, the release film assembly 120 is connected with the frame 110, the release film assembly 120 and the flow channel groove 114 enclose at least part of the flow channel 111, and the frame 110 and the release film assembly 120 enclose a molding space; the frame 110 is provided with a first notch and a second notch, the release film assembly 120 and the first notch enclose a discharge opening 112, the release film assembly 120 and the second notch enclose a feeding opening 113, and the discharge opening 112 and the feeding opening 113 correspond to the bottom of the molding space.

[0082] 4. The resin tank according to 3, wherein the release film assembly 120 comprises a release film 121 and a fixing ring 122, the release film 121 is connected with the fixing ring 122, the resin tank body 100 further comprises a sealing ring 130, the fixing ring 122 is connected with the frame 110, and the sealing ring 130 is located between the fixing ring 122 and the frame 110.

[0083] 5. The resin tank according to 1, wherein the resin tank body 100 is further provided with a feeding hole 115 and a discharge hole 116, the feeding hole 115 and the discharge hole 116 are both in communication with the flow channel 111, the temperature control assembly 200 further comprises a peristaltic tube 230, two ends of the peristaltic tube 230 are in communication with the flow channel 111 through the feeding hole 115 and the discharge hole 116 respectively; the power assembly 210 abuts against the peristaltic tube 230, and is used for pushing the resin to flow by extruding the peristaltic tube 230.

[0084] 6. The resin tank according to 5, wherein the power assembly 210 comprises a driver, an extrusion wheel 211 and a fixed plate 212, the driver is connected with the extrusion wheel 211, the fixed plate 212 is arranged opposite to the extrusion wheel 211, and part of the peristaltic tube 230 is located between the fixed plate 212 and the extrusion wheel 211; the extrusion wheel 211 is used for extruding the peristaltic tube 230 at different degrees in cooperation with the fixed plate 212, the driver is used for driving the extrusion wheel 211 to rotate so as to push the resin in the peristaltic tube 230, and the extrusion wheel 211 is a cam.

[0085] 7. The resin tank according to 5, wherein the temperature control assembly 200 further comprises a temperature measuring assembly 240, and the temperature measuring assembly 240 is used for detecting the temperature of the resin; the temperature measuring assembly 240 comprises a heat conduction piece 241 and a first temperature measuring piece 242, the heat conduction piece 241 is provided with a first conduction hole 243 and a second conduction hole 244, the heat conduction piece 241 is connected with the resin tank body 100, the first conduction hole 243 and the second conduction hole 244 correspond to the feeding hole 115 and the discharge hole 116 respectively, one end of the peristaltic tube 230 is in communication with the feeding hole 115 through the first conduction hole 243, and the other end of the peristaltic tube 230 is in communication with the discharge hole 116 through the second conduction hole 244.

[0086] The first temperature measuring member 242 is connected with the heat conducting member 241 and is used for detecting the temperature of the heat conducting member 241.

[0087] 8. The resin tank according to 7, wherein the temperature control assembly 200 further comprises a heat insulation seat 250, the heat insulation seat 250 is provided with a third conducting hole 251 and a fourth conducting hole 252, the heat insulation seat 250 is connected with the resin tank body 100, the heat conducting member 241 is connected with the heat insulation seat 250, the first conducting hole 243 and the second conducting hole 244 correspond to the third conducting hole 251 and the fourth conducting hole 252 respectively, one end of the peristaltic tube 230 is communicated with the feeding hole 115 through the first conducting hole 243 and the third conducting hole 251, and the other end of the peristaltic tube 230 is communicated with the discharging hole 116 through the second conducting hole 244 and the fourth conducting hole 252.

[0088] 9. The resin tank according to 5, wherein the flow channel 111 comprises a first sub-flow channel and a second sub-flow channel, one end of the first sub-flow channel is communicated with the molding space, the other end of the first sub-flow channel is communicated with the discharging hole 116, one end of the second sub-flow channel is communicated with the molding space, and the other end of the second sub-flow channel is communicated with the feeding hole 115.

[0089] The temperature control member 220 is opposite to the second sub-flow channel and is located between the feeding hole 115 and the position where the second sub-flow channel is communicated with the molding space; the depth of the second sub-flow channel in the direction perpendicular to the bottom surface of the resin tank body 100 is greater than the depth of the first sub-flow channel in the direction perpendicular to the bottom surface of the resin tank body 100; and the length of the second sub-flow channel in the resin flow direction is greater than the length of the first sub-flow channel in the resin flow direction.

[0090] 10. The resin tank according to 1, wherein the resin tank body 100 is further provided with a temperature control member cavity 141, the temperature control member cavity 141 is separated from the flow channel 111 by a heat conducting sealing layer with a preset thickness, the temperature control member 220 is located in the temperature control member cavity 141 and heats the resin in the flow channel 111 through the heat conducting sealing layer; the resin tank body 100 comprises a frame body 110 and a heat conducting sealing cylinder 140, the frame body 110 is provided with a mounting space opening and a mounting space, the mounting space is communicated with the flow channel 111 through the mounting space opening, the heat conducting sealing cylinder 140 comprises the temperature control member cavity 141, the heat conducting sealing cylinder 140 is located in the mounting space, part of the heat conducting sealing cylinder 140 is located in the flow channel 111, and the side wall of the heat conducting sealing cylinder 140 corresponding to the mounting space opening abuts against the frame body 110, the heat conducting sealing layer is the area of the side wall of the heat conducting sealing cylinder 140 located in the flow channel 111; the temperature control assembly 200 further comprises a second temperature measuring member 260, the second temperature measuring member 260 is used for directly or indirectly detecting the temperature of the temperature control member 220; and the resin tank body 100 is provided with a heat dissipation fin.

[0091] 11. The resin tank according to 1, wherein the resin tank body 100 comprises a frame 110 and a support base 150, the support base 150 is connected with the frame 110, the power assembly 210 is connected with the support base 150, the frame 110 and the support base 150 are integrally formed, or the frame 110 and the support base 150 are detachably connected.

[0092] The resin tank further comprises a cover 400, the cover 400 is used for being connected with at least the support base 150, and the cover 400 is used for covering the driving member 210.

[0093] In another aspect, the embodiment of the present application further provides a laminated manufacturing equipment, which comprises the resin tank according to any one of the preceding 1-11 and a base, and the resin tank is connected with the base.

[0094] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the change or replacement within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A resin tank for laminated manufacturing, characterized in that, The resin tank includes: The resin tank body includes a molding space for containing resin. The resin tank body has a flow channel on its bottom wall or side wall and the flow channel is connected to the molding space. A temperature control component, comprising a power component and a temperature control element, wherein the power component acts directly or indirectly on the resin to drive the resin to circulate in the molding space and the flow channel, and the temperature control element heats or cools the resin in the flow channel.

2. The resin tank according to claim 1, characterized in that, The temperature control component also includes a temperature measuring component, which is used to detect the temperature of the resin; The resin tank body is provided with a discharge opening and a feed opening, and the two ends of the flow channel are respectively connected to the molding space through the discharge opening and the feed opening; The discharge opening and the inlet opening are located on opposite sides of the resin tank body, respectively; The resin tank also includes a filter element, which is connected to the main body of the resin tank and covers the feed opening.

3. The resin tank according to claim 2, characterized in that, The resin tank body includes a frame and a release film assembly. The frame has a flow channel groove. The release film assembly is connected to the frame. The release film assembly and the flow channel groove form at least a portion of the flow channel. The frame and the release film assembly form the molding space. The frame is provided with a first notch and a second notch. The release film assembly and the first notch form the discharge opening, and the release film assembly and the second notch form the inlet opening. The discharge opening and the inlet opening correspond to the bottom of the molding space.

4. The resin tank according to claim 3, characterized in that, The release film assembly includes a release film and a fixing ring. The release film is connected to the fixing ring. The resin tank body also includes a sealing ring. The fixing ring is connected to the frame and the sealing ring is located between the fixing ring and the frame.

5. The resin tank according to claim 1, characterized in that, The resin tank body is also provided with a feed hole and a discharge hole, both of which are connected to the flow channel. The temperature control component also includes a peristaltic tube, the two ends of which are connected to the flow channel through the feed hole and the discharge hole, respectively. The power unit abuts against the peristaltic tube and is used to push the resin flow by squeezing the peristaltic tube.

6. The resin tank according to claim 5, characterized in that, The power assembly includes a driver, a pressing wheel, and a fixed plate. The driver is connected to the pressing wheel, the fixed plate is disposed opposite to the pressing wheel, and a portion of the peristaltic tube is located between the fixed plate and the pressing wheel. The extrusion roller is used to cooperate with the fixed plate to extrude the peristaltic tube to different degrees, and the driver is used to drive the extrusion roller to rotate, so as to push the resin in the peristaltic tube; The extrusion wheel is a cam.

7. The resin tank according to claim 5, characterized in that, The temperature control component also includes a temperature measuring component, which is used to detect the temperature of the resin; The temperature measuring component includes a heat-conducting element and a first temperature measuring element. The heat-conducting element has a first conductive hole and a second conductive hole. The heat-conducting element is connected to the resin tank body. The first conductive hole and the second conductive hole correspond to the feed hole and the discharge hole, respectively. One end of the peristaltic tube is connected to the feed hole through the first conductive hole, and the other end of the peristaltic tube is connected to the discharge hole through the second conductive hole. The first temperature measuring element is connected to the heat-conducting element and is used to detect the temperature of the heat-conducting element.

8. The resin tank according to claim 7, characterized in that, The temperature control component also includes a heat insulation base; The heat insulation seat is provided with a third conduction hole and a fourth conduction hole. The heat insulation seat is connected to the grease tank body. The heat-conducting component is connected to the heat insulation seat. The first conduction hole and the second conduction hole correspond to the third conduction hole and the fourth conduction hole, respectively. One end of the peristaltic tube is connected to the feed hole through the first conduction hole and the third conduction hole. The other end of the peristaltic tube is connected to the discharge hole through the second conduction hole and the fourth conduction hole.

9. The resin tank according to claim 5, characterized in that, The flow channel includes a first sub-flow channel and a second sub-flow channel. One end of the first sub-flow channel is connected to the molding space, and the other end of the first sub-flow channel is connected to the discharge hole. One end of the second sub-flow channel is connected to the molding space, and the other end of the second sub-flow channel is connected to the feed hole. The temperature control element is opposite to the second sub-channel and is located between the feed hole and the position where the second sub-channel communicates with the molding space; The depth of the second sub-channel in the direction perpendicular to the bottom surface of the resin tank body is greater than the depth of the first sub-channel in the direction perpendicular to the bottom surface of the resin tank body. The length of the second sub-channel in the resin flow direction is greater than the length of the first sub-channel in the resin flow direction.

10. The resin tank according to claim 1, characterized in that, The resin tank body is also provided with a temperature control cavity. The temperature control cavity is separated from the flow channel by a thermally conductive sealing layer of a preset thickness. The temperature control element is located in the temperature control cavity and heats the resin in the flow channel through the thermally conductive sealing layer. The resin tank body includes a frame and a thermally conductive sealing cylinder. The frame is provided with an installation space opening and an installation space. The installation space is connected to the flow channel through the installation space opening. The thermally conductive sealing cylinder includes the temperature control cavity. The thermally conductive sealing cylinder is located in the installation space. A portion of the thermally conductive sealing cylinder is located in the flow channel, and the outer wall of the thermally conductive sealing cylinder abuts against the side wall corresponding to the installation space opening. The thermally conductive sealing layer is the area of ​​the side wall of the thermally conductive sealing cylinder located in the flow channel. The temperature control component also includes a second temperature measuring element, which is used to directly or indirectly detect the temperature of the temperature control element; the resin tank body is provided with heat dissipation fins.

11. The resin tank according to claim 1, characterized in that, The resin tank body includes a frame and a support base. The support base is connected to the frame, and the power component is connected to the support base. The frame and the support base are integrally formed, or the frame and the support base are detachably connected. The resin tank also includes a cover for being connected at least to the support base to cover the drive member.

12. A laminated manufacturing apparatus, characterized in that, The resin tank includes any one of claims 1-11.

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