Wire extrusion equipment for 3D blind box printer

Abstract

The invention provides wire extrusion equipment for a 3D blind box printer, and belongs to the technical field of 3D printers, the wire extrusion equipment comprises a box body, a first driving assembly, a second driving assembly, a wire feeding assembly, a heating assembly, an extrusion assembly and a cleaning assembly, and the bottom of the box body is provided with a discharging pipe; the wire feeding assembly, the heating assembly and the extrusion assembly are arranged in the box body, the second driving assembly is installed on the side wall of the box body, and the second driving assembly is used for driving the wire feeding assembly to rotate so as to deliver a wire to the heating assembly, so that the wire is heated and melted by the heating assembly. Compared with the prior art, after 3D printing is completed, molten-state wire raw materials remaining in the discharging pipe can be cleaned, so that the situation that the remaining molten-state wire raw materials are solidified in the discharging pipe is avoided, the discharging pipe is prevented from being blocked, and the wire extrusion effect during subsequent 3D printing is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printers, and specifically is a wire extrusion device for a 3D blind box printer. Background Art

[0002] Fused deposition modeling (FDP) is one of the main 3D printing technologies. This technology heats and melts the hot-melt filament, extrudes it from the nozzle, and deposits it on the printing work platform or the previous layer of solidified material. When the temperature is lower than the solidification temperature of the filament, it begins to solidify and shape, and finally prints into a solid object.

[0003] At present, after completing a 3D printing, a portion of molten filament raw materials are likely to remain inside the nozzle and the pipe connected to the nozzle. These residual filament raw materials are likely to solidify inside the nozzle and the pipe over time, causing the inner diameter of the nozzle and the pipe to decrease or even cause the nozzle and the pipe to be completely blocked, thereby hindering the smooth passage of subsequent molten filament raw materials, thereby affecting the subsequent 3D printing effect. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a wire extrusion device for a 3D blind box printer.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A wire extrusion device for a 3D blind box printer includes a box body, a first drive component, a second drive component, a wire feeding component, a heating component, an extrusion component and a cleaning component. A discharge pipe is provided at the bottom of the box. The wire feeding assembly, the heating assembly and the extrusion assembly are arranged inside the box. The second driving assembly is mounted on the side wall of the box body, and is used to drive the wire feeding assembly to rotate, so as to deliver the wire toward the heating assembly, so that the wire is heated and melted by the heating assembly. The first driving assembly is mounted on the side wall of the box body. After the wire material is melted by the heating assembly, the first driving assembly drives the extrusion assembly to rotate so as to extrude the molten wire material through the discharge pipe. The cleaning component is arranged inside the discharge pipe. After 3D printing is completed, the cleaning component is used to clean the molten wire raw material inside the discharge pipe.

[0006] As a further improvement of the present invention: the extrusion assembly includes a second cylinder, a rotating cylinder and a pressing plate. The second cylinder is fixedly arranged inside the box, and the rotating cylinder is provided with two groups, the two groups of rotating cylinders are rotatably arranged inside the second cylinder and are relatively distributed, and a plurality of pressing plates are arranged on the circumferential side walls of the two groups of rotating cylinders. The first driving assembly includes a motor, a first gear and a second gear. The motor is fixedly arranged on the outer wall of the box body, the output shaft of the motor extends into the interior of the box body and is connected to one group of the rotating drums, the end of the other group of the rotating drums is rotatably connected to the box body through the first rotating shaft, the first rotating shaft extends to the outside of the box body away from one end of the corresponding rotating drum and is fixedly connected to the second gear, the first gear is fixedly arranged on the output shaft of the motor and meshes with the second gear, and one end of the discharge pipe extends into the interior of the box body and is connected to the inner cavity of the second column.

[0007] As a further improvement of the present invention: a bracket plate is fixedly provided on the outer wall of the box body, and the motor is fixedly installed on one side of the bracket plate.

[0008] As a further improvement of the present invention: the pressing plate comprises a supporting plate and a pressing plate, One end of the support plate extends into the interior of the rotating drum, and the other end extends to the outside of the rotating drum. The interior of the support plate is hollow. One end of the pressure plate extends into the interior of the support plate and is telescopically matched with the support plate, and the other end extends to the outside of the support plate. A fourth elastic member for providing elastic support to the pressure plate is provided inside the support plate.

[0009] As a further improvement of the present invention: the sides of the two groups of rotating drums that are away from each other are in contact with the inner wall of the second column, the support plate is movably matched with the rotating drum, a support shaft is arranged inside the rotating drum along the axial direction, the end of the support shaft is fixedly connected to the inner wall of the box body, an inclined push plate is fixedly arranged on the support shaft, an arc-shaped top support plate is fixedly arranged on the end of the inclined push plate away from the support shaft, and the arc center of the arc-shaped top support plate coincides with the center of the circle of the rotating drum. A ring sleeve is rotatably mounted on the support shaft, an extension rod is fixedly mounted on the side wall of the support plate, and the extension rod is connected to the ring sleeve via a first elastic member, and the first elastic member is used to provide elastic pulling force to the support plate.

[0010] As a further improvement of the present invention: the wire feeding assembly includes a first cylinder, a wire feeding roller and a wire feeding tube, The first column is fixedly arranged inside the box and is located above the second column. One end of the wire feeding tube is connected to the inner cavity of the first column, and the other end is connected to the inner cavity of the second column. Two groups of wire feeding rollers are provided. The two groups of wire feeding rollers are arranged inside the first column and are relatively distributed. Second rotating shafts are fixedly arranged at the ends of the two groups of wire feeding rollers. The two groups of second rotating shafts extend away from one end of the corresponding wire feeding roller to the outside of the box. A first pulley is fixedly arranged on the output shaft of the motor. The second driving assembly includes a transmission belt, a third gear, a second pulley and a fourth gear. The third gear and the second pulley are fixedly arranged on one group of the second rotating shafts, the fourth gear is fixedly arranged on the other group of the second rotating shafts and meshes with the third gear, one end of the transmission belt is sleeved on the outside of the first pulley, and the other end is sleeved on the outside of the second pulley, and the heating component is arranged on the outside of the wire feeding tube.

[0011] As a further improvement of the present invention: the heating assembly includes an electric heating tube, and the electric heating tube is sleeved outside the wire feeding tube.

[0012] As a further improvement of the present invention: the heating assembly further comprises an annular electric heating plate, the annular electric heating plate is arranged outside the second column, and a discharge hole is provided at the bottom of the discharge pipe. The cleaning assembly includes a third elastic member and a pushing column. The pushing column is movably arranged inside the discharge pipe, and a discharge channel that can be connected to the discharge hole is opened inside the pushing column. One end of the third elastic member is connected to the pushing column, and the other end extends to the inside of the second column barrel and is connected to the inner wall of the second column barrel, which is used to provide elastic pulling force to the pushing column.

[0013] As a further improvement of the present invention: the inner wall of the discharge pipe is provided with a notch, the inside of the push column is provided with a slideway connected to the discharge channel and a chamber connected to the slideway along the radial direction, A sealing plate is slidably arranged in the slideway, a second elastic member for providing elastic support to the sealing plate is arranged inside the chamber, and an inclined surface is arranged at one end of the sealing plate away from the discharge channel.

[0014] As a further improvement of the present invention: the first elastic member, the second elastic member, the third elastic member and the fourth elastic member are springs or metal springs.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the embodiment of the present invention, when 3D printing is required, one end of the wire can be inserted into the interior of the box from the top of the box, and then the second drive component drives the wire feeding component to rotate. When the wire feeding component rotates, the wire inserted into the interior of the box is delivered to the heating component. The heating component heats the wire into a molten raw material, and then the first drive component drives the extrusion component to rotate, and then the molten wire raw material is extruded through the discharge pipe, thereby performing a 3D printing operation. When 3D printing is completed, the cleaning component is used to clean the residual molten wire raw material inside the discharge pipe, thereby preventing the molten wire raw material remaining in the discharge pipe from solidifying and clogging the discharge pipe, thereby ensuring that the subsequent molten wire raw material can be smoothly extruded from the discharge pipe again. Compared with the prior art, after completing 3D printing, the molten wire raw material remaining in the discharge pipe can be cleaned, thereby preventing the residual molten raw material from solidifying inside the discharge pipe and clogging the discharge pipe, thereby improving the extrusion effect of the wire during subsequent 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a wire extrusion device for a 3D blind box printer Figure 1 ; Figure 2 A schematic diagram of the structure of a wire extrusion device for a 3D blind box printer Figure 2 ; Figure 3 A schematic diagram of the structure of a wire extrusion device for a 3D blind box printer Figure 3 ; Figure 4 for Figure 2 A magnified schematic diagram of the middle A area; Figure 5 for Figure 3 A magnified schematic diagram of the middle B area; Figure 6 for Figure 3 Enlarged schematic diagram of the middle C area; Figure 7 for Figure 3 The enlarged schematic diagram of the D area in the middle; In the figure: 10-box, 101-discharging pipe, 102-bracket plate, 103-discharging hole, 104-notch, 20-first driving assembly, 201-motor, 202-first gear, 203-first pulley, 204-second gear, 30-second driving assembly, 301-transmission belt, 302-third gear, 303-second pulley, 304-fourth gear, 40-wire feeding assembly, 401-first cylinder, 402-wire feeding roller, 403-wire feeding tube, 50-heating assembly, 50 1-electric heating tube, 502-electric heating ring plate, 60-extrusion assembly, 601-second column, 602-rotating cylinder, 603-inclined push plate, 604-support shaft, 605-ring sleeve, 606-first elastic member, 607-arc top support plate, 608-extension rod, 609-support plate, 610-pressing plate, 70-cleaning assembly, 701-third elastic member, 702-pushing column, 703-slide, 704-second elastic member, 705-chamber, 706-sealing plate, 707-discharging channel. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 , Figure 2 as well as Figure 3The present embodiment provides a wire extrusion device for a 3D blind box printer, including a box body 10, a first drive assembly 20, a second drive assembly 30, a wire feeding assembly 40, a heating assembly 50, an extrusion assembly 60 and a cleaning assembly 70. A discharge pipe 101 is provided at the bottom of the box body 10, the wire feeding assembly 40, the heating assembly 50 and the extrusion assembly 60 are arranged inside the box body 10, and the second drive assembly 30 is installed on the side wall of the box body 10. The second drive assembly 30 is used to drive the wire feeding assembly 40 to rotate, so as to The wire is delivered toward the heating component 50 so that the wire is heated and melted by the heating component 50. The first driving component 20 is installed on the side wall of the box body 10. After the wire is melted by the heating component 50, the first driving component 20 drives the extrusion component 60 to rotate to extrude the molten wire raw material through the discharge pipe 101. The cleaning component 70 is arranged inside the discharge pipe 101. After 3D printing is completed, the cleaning component 70 is used to clean the molten wire raw material inside the discharge pipe 101.

[0022] When 3D printing is required, one end of the wire can be inserted into the box body 10 from the top of the box body 10, and then the second driving component 30 drives the wire feeding component 40 to rotate. When the wire feeding component 40 rotates, the wire inserted into the box body 10 is delivered to the heating component 50. The heating component 50 heats the wire into a molten raw material, and then the first driving component 20 drives the extrusion component 60 to rotate, and then the molten wire raw material is extruded through the discharge pipe 101, so as to perform a 3D printing operation. When the 3D printing is completed, the cleaning component 70 is used to clean the residual molten wire raw material in the discharge pipe 101, so as to prevent the molten wire raw material remaining in the discharge pipe 101 from solidifying, avoid clogging the discharge pipe 101, and ensure that the subsequent molten wire raw material can be smoothly extruded from the discharge pipe 101 again.

[0023] See also Figure 1 , Figure 3 as well as Figure 5In one embodiment, the extrusion assembly 60 includes a second cylinder 601, a rotating cylinder 602 and a pressing plate. The second cylinder 601 is fixedly arranged inside the box 10. The rotating cylinder 602 is provided with two groups. The two groups of rotating cylinders 602 are rotatably arranged inside the second cylinder 601 and are relatively distributed. A plurality of pressing plates are arranged on the circumferential side walls of the two groups of rotating cylinders 602. The first driving assembly 20 includes a motor 201, a first gear 202 and a second gear 204. The motor 201 is fixedly arranged on the outer wall of the box 10. The output shaft of the motor 201 extends to the interior of the box body 10 and is connected to one group of the rotating drums 602. The ends of the other group of rotating drums 602 are rotatably connected to the box body 10 via a first rotating shaft. The first rotating shaft extends to the outside of the box body 10 away from one end of the corresponding rotating drum 602 and is fixedly connected to the second gear 204. The first gear 202 is fixedly arranged on the output shaft of the motor 201 and meshes with the second gear 204. One end of the discharge pipe 101 extends to the interior of the box body 10 and is connected to the inner cavity of the second column 601.

[0024] After the heating component 50 heats and melts the wire, the molten wire raw material enters the second column barrel 601. At this time, the motor 201 drives its output shaft to rotate, thereby driving the first gear 202 and the corresponding rotating drum 602 to rotate. When the first gear 202 rotates, it drives the other group of rotating drums 602 to rotate through the meshing action with the second gear 204. At this time, the two groups of rotating drums 602 rotate relative to each other. The two groups of rotating drums 602 rotating relatively drive the pressing plates on their respective circumferential side walls to rotate, and the pressing plates are used to press the molten wire raw material inside the second column barrel 601 into the inside of the discharge pipe 101, and then pressed out by the discharge pipe 101, thereby performing a 3D printing operation.

[0025] See also Figure 1 as well as Figure 2 In one embodiment, a bracket plate 102 is fixedly provided on the outer wall of the box body 10 , and the motor 201 is fixedly installed on one side of the bracket plate 102 .

[0026] See also Figure 5 In one embodiment, the pressing plate includes a support plate 609 and a pressing plate 610. One end of the support plate 609 extends to the inside of the rotating cylinder 602, and the other end extends to the outside of the rotating cylinder 602. The support plate 609 is hollow inside. One end of the pressing plate 610 extends to the inside of the support plate 609 and telescopically cooperates with the support plate 609, and the other end extends to the outside of the support plate 609. A fourth elastic member (not shown in the figure) is provided inside the support plate 609 for providing elastic support to the pressing plate 610.

[0027] When the two groups of rotating drums 602 rotate relative to each other, the support plates 609 and the pressure plates 610 on their respective circumferential side walls can be driven to rotate relative to each other. When the pressure plates 610 on the circumferential side walls of the two groups of rotating drums 602 rotate to contact each other, the two groups of pressure plates 610 can provide downward pressure on the molten wire raw material inside the second column 601, and then press the molten wire raw material into the discharge pipe 101, and then output it from the discharge pipe 101; after the two groups of pressure plates 610 contact each other, as the two groups of rotating drums 602 continue to rotate, the two groups of pressure plates 610 are subjected to force and move toward the inside of their corresponding support plates 609, and the third elastic member is compressed by force.

[0028] See also Figure 5 In one embodiment, the sides of the two groups of rotating cylinders 602 that are away from each other are in contact with the inner wall of the second column 601, and the support plate 609 is movably matched with the rotating cylinder 602. A support shaft 604 is provided inside the rotating cylinder 602 along the axial direction, and the end of the support shaft 604 is fixedly connected to the inner wall of the box body 10. An inclined push plate 603 is fixedly provided on the support shaft 604, and an arc-shaped top support plate 607 is fixedly provided on the end of the inclined push plate 603 away from the support shaft 604, and the arc center of the arc-shaped top support plate 607 coincides with the center of the circle of the rotating cylinder 602. A ring sleeve 605 is also rotatably sleeved on the support shaft 604, and an extension rod 608 is fixedly provided on the side wall of the support plate 609, and the extension rod 608 is connected to the ring sleeve 605 through a first elastic member 607, and the first elastic member 607 is used to provide elastic tension to the support plate 609.

[0029] When two groups of pressing plates 610 rotate downward to press the molten wire material, one end of the corresponding support plate 609 located inside the drum 602 acts on the outer wall of the arc-shaped top support plate 607, and the first elastic member 606 is in a stretched state. When the two groups of pressing plates 610 contact each other and rotate to a horizontal state, the support plate 609 slides away from one end of the arc-shaped top support plate 607. Under the pulling action of the first elastic member 606, the support plate 609 and the pressing plate 610 can be driven to move toward the inside of the drum 602 as a whole, so that when the current pressing plate 610 moves, it no longer protrudes from the outside of the drum 602, thereby preventing the pressing plate 610 from generating an oblique pressure on the molten wire material in the area below the two groups of drums 602. When the two groups of pressing plates 610 no longer protrude from the outside of the drum 602, the drum 60 The subsequent pressing plates 610 on the circumferential side wall continue to rotate until they are in contact with each other, and then continue to press the molten wire material downward, so that the molten wire material can be continuously discharged from the discharge pipe 101; when the pressing plate 610 received in the rotating drum 602 rotates to an upward position, as the rotating drum 602 continues to rotate, the supporting plate 609 corresponding to the pressing plate 610 can act on the inclined push plate 603, and the inclined push plate 603 pushes the supporting plate 609 to move to the outside of the rotating drum 602, thereby driving the pressing plate 610 to extend from the inside of the rotating drum 602 until the supporting plate 609 is transferred from the inclined push plate 603 to the outer wall of the arc-shaped top support plate 607, and the pressing plate 610 rotates downward again to continue to press the molten wire material in the second column 601 to the inside of the discharge pipe 101.

[0030] See also Figure 1 , Figure 2 as well as Figure 3In one embodiment, the wire feeding assembly 40 includes a first cylindrical barrel 401, a wire feeding roller 402 and a wire feeding tube 403. The first cylindrical barrel 401 is fixedly arranged inside the box body 10 and is located above the second cylindrical barrel 601. One end of the wire feeding tube 403 is connected to the inner cavity of the first cylindrical barrel 401, and the other end is connected to the inner cavity of the second cylindrical barrel 601. The wire feeding roller 402 is provided with two groups. The two groups of wire feeding rollers 402 are arranged inside the first cylindrical barrel 401 and are relatively distributed. The ends of the two groups of wire feeding rollers 402 are fixedly provided with second rotating shafts. The two groups of the second rotating shafts extend away from one end of the corresponding wire feeding roller 402 to the Outside the box body 10, a first pulley 203 is fixedly provided on the output shaft of the motor 201, and the second driving component 30 includes a transmission belt 301, a third gear 302, a second pulley 303 and a fourth gear 304. The third gear 302 and the second pulley 303 are fixedly provided on one group of the second rotating shafts, and the fourth gear 304 is fixedly provided on another group of the second rotating shafts and meshes with the third gear 303. One end of the transmission belt 301 is sleeved on the outside of the first pulley 203, and the other end is sleeved on the outside of the second pulley 303. The heating component 50 is provided on the outside of the wire feeding tube 403.

[0031] When 3D printing is required, one end of the wire can be inserted into the box body 10 from the top of the box body 10. After the wire is inserted into the box body 10, it can enter the first column 401 and pass between the two sets of wire feeding rollers 402. Then, the motor 201 and its output shaft are used to drive the two sets of rotating drums 602 to rotate relative to each other. When the output shaft of the motor 201 rotates, it can also drive the first pulley 203 to rotate. Through the transmission effect of the transmission belt 301 and the second pulley 303, the corresponding second rotating shaft, the third gear 302 and the corresponding wire feeding roller 402 are driven to rotate. When the third gear 302 rotates, it can rotate with the fourth gear The meshing action of 304 drives the other set of wire feeding rollers 402 to rotate, and the two sets of wire feeding rollers 402 rotate relative to each other. When the two sets of wire feeding rollers 402 rotate relative to each other, the wire can be delivered to the inside of the wire feeding tube 403 through the friction effect on the wire. At this time, the wire inside the wire feeding tube 403 is heated by the heating component 50 outside the wire feeding tube 403, so that the wire is melted into a molten raw material. The molten wire raw material enters the inside of the second column 601 through the wire feeding tube 403, and is then pressed into the inside of the discharge tube 101 by the rotating drum 602 and the pressing plate 610, and then output by the discharge tube 101 to realize the 3D printing operation.

[0032] See also Figure 3 In one embodiment, the heating assembly 50 includes an electric heating tube 501 , and the electric heating tube 501 is sleeved on the outside of the wire feeding tube 403 .

[0033] After the wire is delivered to the inside of the wire feeding tube 403, the wire feeding tube 403 is heated by the electric heating tube 501, and the wire feeding tube 403 transfers the heat to the wire inside it, thereby heating and melting the wire.

[0034] See also Figure 3 , Figure 4 , Figure 6 as well as Figure 7 In one embodiment, the heating component 50 also includes an annular electric heating plate 502, which is arranged outside the second column barrel 601, and a discharge hole 103 is provided at the bottom of the discharge pipe 101. The cleaning component 70 includes a third elastic member 701 and a pushing column 702, and the pushing column 702 is movably arranged inside the discharge pipe 101. A discharge channel 707 that can be connected to the discharge hole 103 is provided inside the pushing column 702. One end of the third elastic member 701 is connected to the pushing column 702, and the other end extends to the inside of the second column barrel 601 and is connected to the inner wall of the second column barrel 601, so as to provide elastic pulling force to the pushing column 702.

[0035] When the pressing plate 610 rotates to pressurize the molten wire material into the discharge pipe 101, the pushing column 702 sinks to the bottom of the inner side of the discharge pipe 101 under the pressure of the molten wire material. At this time, the discharge channel 707 is connected with the discharge hole 103, and the third elastic member 701 is in a stretched state. The molten wire material is output through the discharge channel 707 and the discharge hole 103 to perform the 3D printing operation. When the 3D printing is completed, the motor 201 stops working, and the two sets of rotating drums 602 and the two sets of wire feeding rollers 402 stop rotating. At this time, the pushing column 702 is no longer subjected to the pressure of the molten wire raw material, and then moves upward along the inside of the discharge pipe 101 under the pull of the third elastic member 701, so as to push the residual molten wire raw material in the discharge pipe 101 to the inside of the second column barrel 601, so as to clean up the residual raw material in the discharge pipe 101; when 3D printing is performed again subsequently, the annular electric heating tube 502 outside the second column barrel 601 can heat the second column barrel 601 simultaneously, and the second column barrel 601 transfers the heat inward, so as to heat and melt the residual raw material.

[0036] See also Figure 7 In one embodiment, a slot 104 is provided on the inner wall of the discharge pipe 101, a slideway 703 connected to the discharge channel 707 and a chamber 705 connected to the slideway 703 are provided inside the push column 702 along a radial direction, a sealing plate 706 is slidably provided in the slideway 703, a second elastic member 704 for providing elastic support to the sealing plate 706 is provided inside the chamber 705, and an inclined surface is provided at one end of the sealing plate 706 away from the discharge channel 707.

[0037] When the pressing plate 610 rotates to pressurize the molten wire material into the discharge tube 101, the push rod 702 sinks to the bottom of the inner side of the discharge tube 101 under the pressure of the molten wire material. At this time, the sealing plate 706 extends to the inside of the notch 104 at one end with the inclined surface under the elastic support of the second elastic member 704, and the other end of the sealing plate 706 is retracted into the slideway 703, so that the discharge channel 707 is in an open state. The molten wire material pressed into the discharge tube 101 by the pressing plate 610 can be output through the opened discharge channel 707 and the discharge hole 103, thereby realizing the 3D printing operation. When the 3D printing is completed, as the motor 201 stops, During operation, the pressing plate 610 stops rotating, and thus the molten wire material is no longer pressed into the discharge pipe 101. The third elastic member 701 pulls the pushing column 702 so that the pushing column 702 moves upward along the inside of the discharge pipe 101. When the pushing column 702 moves upward, it drives the sealing plate 706 to move upward. The inclined surface at one end of the sealing plate 706 withdraws from the inside of the notch 104 and slides along the inside of the slideway 703. When the sealing plate 706 slides, the other end thereof extends into the inside of the discharge channel 707, thereby sealing the discharge channel 707, so that when the pushing column 702 moves upward, the residual wire material located in the discharge pipe 101 cannot pass through the discharge channel 707, so as to ensure the cleaning effect of the pushing column 702 on the residual material.

[0038] In one embodiment, the first elastic member 606 , the second elastic member 704 , the third elastic member 701 and the fourth elastic member may be springs or metal springs, which are not limited here.

[0039] In the embodiment of the present invention, when 3D printing is required, one end of the wire can be inserted into the box body 10 from the top of the box body 10, and then the second driving component 30 drives the wire feeding component 40 to rotate. When the wire feeding component 40 rotates, the wire inserted into the box body 10 is delivered to the heating component 50. The heating component 50 heats the wire into a molten raw material, and then the first driving component 20 drives the extrusion component 60 to rotate, and then the molten wire raw material is extruded through the discharge pipe 101, so as to perform a 3D printing operation. When the 3D printing is completed, the discharge material is cleaned by the cleaning component 70. The residual molten wire material inside the tube 101 is cleaned up to prevent the molten wire material remaining inside the discharge tube 101 from solidifying and clogging the discharge tube 101, thereby ensuring that the subsequent molten wire material can be smoothly extruded from the discharge tube 101 again. Compared with the prior art, after completing 3D printing, the residual molten wire material in the discharge tube 101 can be cleaned up to prevent the residual molten wire material from solidifying inside the discharge tube 101 and clogging the discharge tube 101, thereby improving the wire extrusion effect during subsequent 3D printing.

[0040] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A wire extrusion device for a 3D blind box printer, characterized in that: It includes a box body, a first driving assembly, a second driving assembly, a wire feeding assembly, a heating assembly, an extrusion assembly and a cleaning assembly. A discharge pipe is provided at the bottom of the box. The wire feeding assembly, the heating assembly and the extrusion assembly are arranged inside the box. The second driving assembly is mounted on the side wall of the box body, and is used to drive the wire feeding assembly to rotate, so as to deliver the wire toward the heating assembly, so that the wire is heated and melted by the heating assembly. The first driving assembly is mounted on the side wall of the box body. After the wire material is melted by the heating assembly, the first driving assembly drives the extrusion assembly to rotate so as to extrude the molten wire material through the discharge pipe. The cleaning component is arranged inside the discharge pipe. After 3D printing is completed, the cleaning component is used to clean the molten wire raw material inside the discharge pipe.

2. A wire extrusion device for a 3D blind box printer according to claim 1, characterized in that: The extrusion assembly includes a second cylinder, a rotating cylinder and a pressing plate. The second cylinder is fixedly arranged inside the box, and the rotating cylinder is provided with two groups, the two groups of rotating cylinders are rotatably arranged inside the second cylinder and are relatively distributed, and a plurality of pressing plates are arranged on the circumferential side walls of the two groups of rotating cylinders. The first driving assembly includes a motor, a first gear and a second gear. The motor is fixedly arranged on the outer wall of the box body, the output shaft of the motor extends into the interior of the box body and is connected to one group of the rotating drums, the end of the other group of the rotating drums is rotatably connected to the box body through the first rotating shaft, the first rotating shaft extends to the outside of the box body away from one end of the corresponding rotating drum and is fixedly connected to the second gear, the first gear is fixedly arranged on the output shaft of the motor and meshes with the second gear, and one end of the discharge pipe extends into the interior of the box body and is connected to the inner cavity of the second column.

3. A wire extrusion device for a 3D blind box printer according to claim 2, characterized in that: A bracket plate is fixedly arranged on the outer wall of the box body, and the motor is fixedly mounted on one side of the bracket plate.

4. A wire extrusion device for a 3D blind box printer according to claim 2, characterized in that: The pressing plate comprises a supporting plate and a pressing plate. One end of the support plate extends into the interior of the rotating drum, and the other end extends to the outside of the rotating drum. The interior of the support plate is hollow. One end of the pressure plate extends into the interior of the support plate and is telescopically matched with the support plate, and the other end extends to the outside of the support plate. A fourth elastic member for providing elastic support to the pressure plate is provided inside the support plate.

5. A wire extrusion device for a 3D blind box printer according to claim 4, characterized in that: The sides of the two groups of rotating drums that are away from each other are in contact with the inner wall of the second column, the support plate is movably matched with the rotating drum, a support shaft is arranged inside the rotating drum along the axial direction, the end of the support shaft is fixedly connected to the inner wall of the box body, an inclined push plate is fixedly arranged on the support shaft, and an arc-shaped top support plate is fixedly arranged on the end of the inclined push plate away from the support shaft, and the arc center of the arc-shaped top support plate coincides with the circle center of the rotating drum. A ring sleeve is rotatably mounted on the support shaft, an extension rod is fixedly mounted on the side wall of the support plate, and the extension rod is connected to the ring sleeve via a first elastic member, and the first elastic member is used to provide elastic pulling force to the support plate.

6. A wire extrusion device for a 3D blind box printer according to claim 5, characterized in that: The wire feeding assembly comprises a first cylinder, a wire feeding roller and a wire feeding tube. The first column is fixedly arranged inside the box and is located above the second column. One end of the wire feeding tube is connected to the inner cavity of the first column, and the other end is connected to the inner cavity of the second column. Two groups of wire feeding rollers are provided. The two groups of wire feeding rollers are arranged inside the first column and are relatively distributed. Second rotating shafts are fixedly arranged at the ends of the two groups of wire feeding rollers. The two groups of second rotating shafts extend away from one end of the corresponding wire feeding roller to the outside of the box. A first pulley is fixedly arranged on the output shaft of the motor. The second driving assembly includes a transmission belt, a third gear, a second pulley and a fourth gear. The third gear and the second pulley are fixedly arranged on one group of the second rotating shafts, the fourth gear is fixedly arranged on the other group of the second rotating shafts and meshes with the third gear, one end of the transmission belt is sleeved on the outside of the first pulley, and the other end is sleeved on the outside of the second pulley, and the heating component is arranged on the outside of the wire feeding tube.

7. A wire extrusion device for a 3D blind box printer according to claim 6, characterized in that: The heating assembly comprises an electric heating tube, and the electric heating tube is sleeved outside the wire feeding tube.

8. A wire extrusion device for a 3D blind box printer according to claim 7, characterized in that: The heating assembly further comprises an annular electric heating plate, which is arranged outside the second column, and a discharge hole is provided at the bottom of the discharge pipe. The cleaning assembly includes a third elastic member and a pushing column. The pushing column is movably arranged inside the discharge pipe, and a discharge channel that can be connected to the discharge hole is opened inside the pushing column. One end of the third elastic member is connected to the pushing column, and the other end extends to the inside of the second column barrel and is connected to the inner wall of the second column barrel, which is used to provide elastic pulling force to the pushing column.

9. A wire extrusion device for a 3D blind box printer according to claim 8, characterized in that: The inner wall of the discharge pipe is provided with a notch, and the interior of the push column is provided with a slideway connected to the discharge channel and a chamber connected to the slideway along the radial direction. A sealing plate is slidably arranged in the slideway, a second elastic member for providing elastic support to the sealing plate is arranged inside the chamber, and an inclined surface is arranged at one end of the sealing plate away from the discharge channel.

10. A wire extrusion device for a 3D blind box printer according to claim 8, characterized in that: The first elastic member, the second elastic member, the third elastic member and the fourth elastic member are springs or metal springs.

Images