A wire extrusion device for 3D blind box printer

Abstract

The present invention provides a wire extrusion device for a 3D blind box printer, which belongs to the technical field of 3D printers and 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 body, the wire feeding component, the heating component and the extrusion component are arranged inside the box body, the second drive component is installed on the side wall of the box body, and the second drive component is used to drive the wire feeding component to rotate to deliver the wire toward the heating component so that the wire is heated and melted by the heating component. Compared with the prior art, the embodiment of the present invention can clean up the molten wire raw material remaining in the discharge pipe after completing 3D printing, thereby avoiding the solidification of the residual molten raw material inside the discharge pipe, preventing the discharge pipe from being blocked, and improving the wire extrusion effect during subsequent 3D printing.

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, extruding it from the nozzle and depositing 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 form, and finally prints into a solid object.

[0003] Currently, after completing a 3D print, a portion of molten filament raw materials is likely to remain inside the nozzle and the pipes connected to the nozzle. These residual filament raw materials are likely to solidify inside the nozzle and the pipes 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:

[0006] 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.

[0007] A discharge pipe is provided at the bottom of the box.

[0008] The wire feeding assembly, the heating assembly and the extrusion assembly are arranged inside the box.

[0009] 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.

[0010] The first driving assembly is mounted on the side wall of the box. 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.

[0011] 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.

[0012] As a further improvement of the present invention: the extrusion assembly includes a second cylinder, a rotating cylinder and a pressing plate.

[0013] 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. A plurality of pressing plates are provided on the circumferential side walls of the two groups of rotating cylinders.

[0014] The first driving assembly includes a motor, a first gear and a second gear,

[0015] The motor is fixedly arranged on the outer wall of the box body, the output shaft of the motor extends to the interior of the box body and is connected to one group of the rotating drums, and the end of the other group of the rotating drums is rotatably connected to the box body through the first rotating shaft, and 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 to the interior of the box body and is connected to the inner cavity of the second column.

[0016] 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 mounted on one side of the bracket plate.

[0017] As a further improvement of the present invention: the pressing plate comprises a support plate and a pressing plate,

[0018] One end of the support plate extends to the inside 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 to the inside 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 is provided inside the support plate for providing elastic support to the pressure plate.

[0019] As a further improvement of the present invention: the sides of the two groups of rotating drums away from each other are in contact with the inner wall of the second cylindrical drum, the support plate is movably matched with the rotating drum, a support shaft is provided inside the rotating drum along the axial direction, the end of the support shaft is fixedly connected to the inner wall of the box, an inclined push plate is fixedly provided on the support shaft, and an arc-shaped top support plate is fixedly provided 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.

[0020] 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 and the ring sleeve are connected via a first elastic member, which is used to provide elastic tension to the support plate.

[0021] 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,

[0022] The first cylindrical cylinder is fixedly arranged inside the box and is located above the second cylindrical cylinder. One end of the wire feeding tube is communicated with the inner cavity of the first cylindrical cylinder, and the other end is communicated with the inner cavity of the second cylindrical cylinder. The wire feeding roller is provided with two groups. The two groups of wire feeding rollers are arranged inside the first cylindrical cylinder and are relatively distributed. The ends of the two groups of wire feeding rollers are fixedly provided with second rotating shafts. The two groups of second rotating shafts extend away from one end corresponding to the wire feeding roller to the outside of the box. A first pulley is fixedly provided on the output shaft of the motor.

[0023] The second driving assembly includes a transmission belt, a third gear, a second pulley and a fourth gear.

[0024] 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.

[0025] As a further improvement of the present invention: the heating assembly includes an electric heating tube, and the electric heating tube is sleeved on the outside of the wire feeding tube.

[0026] 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 opened at the bottom of the discharge pipe.

[0027] The cleaning assembly includes a third elastic member and a pushing column.

[0028] 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.

[0029] As a further improvement of the present invention: a notch is provided on the inner wall of the discharge pipe, and a slideway connected to the discharge channel and a chamber connected to the slideway are provided inside the push column along the radial direction.

[0030] A sealing plate is slidably provided in the slideway, a second elastic member for providing elastic support to the sealing plate is provided inside the chamber, and an inclined surface is provided at one end of the sealing plate away from the discharge channel.

[0031] 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.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] In an embodiment of the present invention, when 3D printing is required, one end of the wire can be passed through 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 passed 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, avoiding clogging of the discharge pipe, and ensuring that the subsequent molten wire raw material can be smoothly extruded from the discharge pipe again. Compared with the existing technology, 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, preventing clogging of the discharge pipe, and improving the wire extrusion effect during subsequent 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a wire extrusion device for a 3D blind box printer Figure 1 ;

[0035] Figure 2 A schematic diagram of the structure of a wire extrusion device for a 3D blind box printer Figure 2 ;

[0036] Figure 3 A schematic diagram of the structure of a wire extrusion device for a 3D blind box printer Figure 3 ;

[0037] Figure 4 for Figure 2 A magnified schematic diagram of area A in the middle;

[0038] Figure 5 for Figure 3 A magnified schematic diagram of area B in the middle;

[0039] Figure 6 for Figure 3 Enlarged schematic diagram of area C in the middle;

[0040] Figure 7 for Figure 3 Enlarged schematic diagram of area D in the middle;

[0041] In the figure: 10-box, 101-discharge pipe, 102-bracket plate, 103-discharge hole, 104-notch, 20-first drive assembly, 201-motor, 202-first gear, 203-first pulley, 204-second gear, 30-second drive 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 pipe, 50-heating assembly, 50 1-electric heating tube, 502-electric heating ring plate, 60-extrusion assembly, 601-second column, 602-rotating cylinder, 603-oblique push plate, 604-support shaft, 605-ring sleeve, 606-first elastic member, 607-arc-shaped 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-discharge channel. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0043] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0044] 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 accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] See also Figure 1 、 Figure 2 as well as Figure 3, this 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.

[0047] When 3D printing is required, one end of the wire can be passed through the inside of the box 10 from the top of the box 10, and then the second drive component 30 drives the wire feeding component 40 to rotate. When the wire feeding component 40 rotates, the wire passed into the inside of the box 10 is delivered to the heating component 50. The heating component 50 heats the wire into a molten raw material, and then the first drive component 20 drives the extrusion component 60 to rotate, and then the molten wire raw material is extruded through the discharge pipe 101, thereby performing a 3D printing operation. After 3D printing is completed, the cleaning component 70 is used to clean the residual molten wire raw material inside 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.

[0048] 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 body 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 provided 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 body 10. The output shaft of the motor 201 extends to the interior of the box 10 and is connected to one group of the rotating drums 602. The end of the other group of rotating drums 602 is rotatably connected to the box 10 through a first rotating shaft. The first rotating shaft extends to the outside of the box 10 away from one end corresponding to the rotating drum 602 and is fixedly connected to the second gear 204. The first gear 202 is fixedly set on the output shaft of the motor 201 and engages with the second gear 204. One end of the discharge pipe 101 extends to the interior of the box 10 and is connected to the inner cavity of the second column 601.

[0049] After the heating component 50 heats and melts the wire, the molten wire raw material enters the second cylindrical 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 set of rotating drums 602 to rotate through the meshing action with the second gear 204. At this time, the two sets of rotating drums 602 rotate relative to each other. The two sets of rotating drums 602 rotating relative to each other drive the pressing plates on their respective circumferential side walls to rotate. The pressing plates are used to press the molten wire raw material inside the second cylindrical 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.

[0050] 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 .

[0051] 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 interior of the support plate 609 is hollow. One end of the pressing plate 610 extends to the inside of the support plate 609 and cooperates with the support plate 609 in telescopic manner, 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.

[0052] 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, thereby pressing the molten wire raw material into the inside of the discharge pipe 101, and then output 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.

[0053] 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. 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. An extension rod 608 is fixedly provided on the side wall of the support plate 609. The extension rod 608 and the ring sleeve 605 are connected by a first elastic member 607. The first elastic member 607 is used to provide elastic tension to the support plate 609.

[0054] When the two sets of pressing plates 610 rotate downward to press the molten wire material, the corresponding support plate 609 is located at one end inside the rotating drum 602 and acts on the outer wall of the arc-shaped top support plate 607. The first elastic member 606 is in a stretched state. When the two sets 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 rotating drum 602 as a whole, so that the current pressing plate 610 no longer protrudes from the outside of the rotating drum 602 when moving, thereby preventing the pressing plate 610 from generating oblique pressure on the molten wire material in the area below the two sets of rotating drums 602. After the current two sets of pressing plates 610 no longer protrude from the outside of the rotating drum 602, the rotating drum 60 2 The subsequent pressing plates 610 on the circumferential side walls continue to rotate until they contact each other, thereby continuing to press the molten wire raw material downward, so that the molten wire raw 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 support plate 609 corresponding to the pressing plate 610 can act on the inclined push plate 603, and the inclined push plate 603 pushes the support plate 609 so that the support plate 609 moves toward 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 support plate 609 transitions 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 raw material in the second column 601 to the inside of the discharge pipe 101.

[0055] 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 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 drive 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 the other 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.

[0056] When 3D printing is required, one end of the wire can be passed through the inside of the box 10 from the top of the box 10. After passing through the inside of the box 10, the wire can enter the inside of the first cylinder 401 and pass through 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 action 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 is connected with the fourth gear The meshing action of 304 drives another 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 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 pressure plate 610, and then output by the discharge tube 101 to realize the 3D printing operation.

[0057] See also Figure 3 In one embodiment, the heating component 50 includes an electric heating pipe 501 , and the electric heating pipe 501 is sleeved on the outside of the wire feeding pipe 403 .

[0058] 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.

[0059] 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 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 communicate with 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 601 and is connected to the inner wall of the second column 601, so as to provide elastic tension to the pushing column 702.

[0060] When the pressing plate 610 rotates to press 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 moves upward along the inside of the discharge tube 101 under the pull of the third elastic member 701, so as to push the residual molten wire raw material inside the discharge tube 101 into the inside of the second column barrel 601, thereby cleaning the residual raw material inside the discharge tube 101; when 3D printing is performed again subsequently, the annular electric heating tube 502 outside the second column barrel 601 can simultaneously heat the second column barrel 601, and the second column barrel 601 transfers the heat inward, thereby heating and melting the residual raw material.

[0061] See also Figure 7 In one embodiment, a slot 104 is provided on the inner wall of the discharge pipe 101, a slide 703 connected to the discharge channel 707 and a chamber 705 connected to the slide 703 are provided in the radial direction inside the push column 702, a sealing plate 706 is slidingly provided in the slide 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 on the end of the sealing plate 706 away from the discharge channel 707.

[0062] When the pressing plate 610 rotates to press 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 sealing plate 706 extends to the inside of the slot 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 inside of the slide 703, so that the discharge channel 707 is in an open state. The molten wire material pressed into the discharge pipe 101 by the pressing plate 610 can be output through the opened discharge channel 707 and the discharge hole 103 to realize the 3D printing operation. When the 3D printing is completed, as the motor 201 stops, During operation, the pressure plate 610 stops rotating, and 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 slot 104 and slides along the inside of the slide 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 inside 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.

[0063] 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 herein.

[0064] In the embodiment of the present invention, when 3D printing is required, one end of the wire can be passed through the top of the box 10 into the interior of the box 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 passed into the interior of the box 10 is delivered to the heating component 50. The heating component 50 heats the wire into a molten raw material. 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, thereby performing 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, thereby preventing the molten wire material remaining inside the discharge tube 101 from solidifying, avoiding clogging of the discharge tube 101, and ensuring that the subsequent molten wire material can be smoothly extruded from the discharge tube 101 again. Compared with the existing technology, after completing 3D printing, the molten wire material remaining in the discharge tube 101 can be cleaned, thereby preventing the residual molten material from solidifying inside the discharge tube 101, preventing clogging of the discharge tube 101, and improving the wire extrusion effect during subsequent 3D printing.

[0065] 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 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 drive assembly, a second drive 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. 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 material inside the discharge pipe. 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. A plurality of pressing plates are provided 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 to the interior of the box body and is connected to one group of the rotating drums, and the end of the other group of rotating drums is rotatably connected to the box body through a first rotating shaft, and 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 to the interior of the box body and is connected to the inner cavity of the second cylinder. The heating assembly includes an annular electric heating plate, which is arranged outside the second column, and a discharge hole is opened at the bottom of the discharge pipe. The cleaning assembly includes a third elastic member and a pushing column. The pusher column is movably arranged inside the discharge pipe, and a discharge channel that can communicate with the discharge hole is opened inside the pusher column. One end of the third elastic member is connected to the pusher column, and the other end extends into the interior of the second column barrel and is connected to the inner wall of the second column barrel, so as to provide elastic tension to the pusher column; 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 provided in the slideway, a second elastic member for providing elastic support to the sealing plate is provided inside the chamber, and an inclined surface is provided at one end of the sealing plate away from the discharge channel.

2. A wire extrusion device for a 3D blind box printer according to claim 1, characterized in that, 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.

3. A wire extrusion device for a 3D blind box printer according to claim 1, characterized in that, The pressing plate comprises a supporting plate and a pressing plate. One end of the support plate extends to the inside 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 to the inside 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 is provided inside the support plate for providing elastic support to the pressure plate.

4. A wire extrusion device for a 3D blind box printer according to claim 3, 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 provided inside the rotating drum along the axial direction, the end of the support shaft is fixedly connected to the inner wall of the box, an inclined push plate is fixedly provided on the support shaft, and an arc-shaped top support plate is fixedly provided 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 and the ring sleeve are connected via a first elastic member, which is used to provide elastic tension to the support plate.

5. A wire extrusion device for a 3D blind box printer according to claim 4, characterized in that, The wire feeding assembly includes a first cylinder, a wire feeding roller and a wire feeding tube. The first cylindrical cylinder is fixedly arranged inside the box and is located above the second cylindrical cylinder. One end of the wire feeding tube is communicated with the inner cavity of the first cylindrical cylinder, and the other end is communicated with the inner cavity of the second cylindrical cylinder. The wire feeding roller is provided with two groups. The two groups of wire feeding rollers are arranged inside the first cylindrical cylinder and are relatively distributed. The ends of the two groups of wire feeding rollers are fixedly provided with second rotating shafts. The two groups of second rotating shafts extend away from one end corresponding to the wire feeding roller to the outside of the box. A first pulley is fixedly provided 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.

6. A wire extrusion device for a 3D blind box printer according to claim 5, characterized in that: The heating assembly includes an electric heating pipe, and the electric heating pipe is sleeved on the outside of the wire feeding pipe.

7. A wire extrusion device for a 3D blind box printer according to claim 6, 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.

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