An integrated extruder for 3D printing

Abstract

The present invention belongs to the technical field of 3D printing equipment, and in particular relates to an integrated extruder for 3D printing, comprising an extruder main housing, a printing wire, a receiving card fixedly mounted on the extruder main housing, and a plurality of material rod limiting grooves are circumferentially arranged on the receiving card, a plurality of extruder feeding rods corresponding to the material rod limiting grooves are slidably connected to the receiving card, an extrusion structure for extruding the printing wire is rotatably connected to the receiving card, a feeder shift plate fixedly connected to the extrusion structure is rotatably connected to the bottom of the receiving card, an ejector is arranged at the bottom of the feeder shift plate, a plurality of dynamic adjustment structures corresponding to the extruder feeding rods are arranged at the bottom of the extruder main housing, one side of the dynamic adjustment structure is fixedly connected to the corresponding extruder feeding rod, and the dynamic adjustment structure is used to dynamically adjust the position of the extruder feeding rod according to the connection state between the feeding rod receiving groove and the material rod limiting groove.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printing equipment, and in particular relates to an integrated extruder for 3D printing. Background Art

[0002] 3D printing technology can save materials, reduce costs, improve material utilization, and directly generate parts of any shape from computer graphics data. In addition, 3D printing can automatically, quickly, and accurately convert designs into physical models, effectively shortening the product development cycle. It can also print assembled products, greatly reducing assembly costs; in 3D printing equipment, the extruder is one of the core components, responsible for discharging raw materials such as plastic filaments into the discharge head, heating and melting the plastic filaments through the device inside the discharge head, and then discharging and stacking them layer by layer according to computer instructions. However, the existing extruders are usually installed with one extruder for one printing wire. When multiple colors of printing wires are required, the wires need to be frequently replaced, or multiple extruders need to be used, which makes the equipment bulky, and the manufacturing cost and energy consumption will also increase. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention provides an integrated extruder for 3D printing to solve the problem that the existing multi-color 3D printing requires frequent replacement of wires or installation of multiple extruders, which makes the equipment bulky and increases the manufacturing cost and energy consumption.

[0005] (II) Technical content

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An integrated extruder for 3D printing, comprising an extruder main housing and a printing wire, wherein an extruder upper end cover is clamped on the top of the extruder main housing, a receiving card is fixedly installed on the extruder main housing, and a plurality of material rod limiting grooves are circumferentially arranged on the receiving card, a plurality of extruder feeding rods corresponding to the material rod limiting grooves are slidably connected on the receiving card, and the extruder feeding rods are slidably connected to the corresponding material rod limiting grooves;

[0008] An extrusion structure for extruding the printing wire is rotatably connected to the receiving card plate, and a feeder shift plate fixedly connected to the extrusion structure is rotatably connected to the bottom of the receiving card plate;

[0009] A feed rod receiving groove is arranged on the feeder shift plate, and the feed rod receiving groove is connected with one of the material rod limiting grooves; wherein, when the feed rod receiving groove is connected with one of the material rod limiting grooves, the feed rod receiving groove and the material rod limiting groove connected with the feed rod receiving groove are slidably connected with the same extruder feed rod, and the outer wall of the remaining extruder feed rods is slidably connected with the outer wall of the feeder shift plate;

[0010] An ejector is provided at the bottom of the feeder shift plate, and the ejector is used to eject the extruder feed rod in the feed rod receiving groove. A plurality of dynamic adjustment structures corresponding to the extruder feed rods are provided at the bottom of the extruder main housing, and one side of the dynamic adjustment structure is fixedly connected to the corresponding extruder feed rod. The dynamic adjustment structure is used to dynamically adjust the position of the extruder feed rod according to the connection state between the feed rod receiving groove and the feed rod limiting groove;

[0011] The free end of the printing wire passes through the extruder main housing and the extruder feeding rod in turn.

[0012] Furthermore, the main housing of the extruder is snap-connected to the upper end cover of the extruder through a snap buckle;

[0013] A fixed buckle is fixedly connected to the bottom of the main housing of the extruder, and a wire box is clamped on the fixed buckle, in which the printing wire is placed;

[0014] A first through-hole is formed on each of the plurality of extruder feeding rods, and a plurality of second through-holes corresponding to the first through-holes are formed at the bottom of the main housing of the extruder;

[0015] One end of the printing wire passes through the first through hole and the second through hole in sequence.

[0016] Further, the ejector is triangular in shape, the bottoms of the multiple extruder feed rods are provided with inner edges, the upper surface of the inner edges is slidably connected to the lower surface of the feeder shift plate, and the inclined surface of the ejector is in slidable contact with the side surface of one of the inner edges;

[0017] The dynamic adjustment structure includes a reciprocating slide rod and a spring. The bottom of the extruder feeding rod is fixedly connected to the reciprocating slide rod, and the reciprocating slide rod is L-shaped. The bottom of the extruder main shell is provided with a plurality of sliding grooves corresponding to the reciprocating slide rods one by one. Springs are inserted in the sliding grooves. The transverse rod body of the reciprocating slide rod is slidably connected in the corresponding sliding groove, and the end portion is in contact with the spring in the sliding groove.

[0018] Furthermore, the rod body of the extruder feeding rod is symmetrically provided with first inner recesses, and the extruder feeding rod is slidingly connected with the corresponding feed rod limiting grooves through the two first inner recesses, and the inner wall tops of the two first inner recesses are in sliding contact with the upper surface of the receiving clamping plate.

[0019] Further, the extrusion structure includes a main extrusion motor, the bottom of the main extrusion motor is fixedly connected with a lower docking shaft, the bottom end of the lower docking shaft passes through the receiving card plate, the feeder shift plate and the extruder main housing and extends outside, and the lower docking shaft is fixedly connected to the feeder shift plate;

[0020] The main extrusion motor is in sliding contact with the receiving card plate;

[0021] A first rotating motor is installed on the upper end cover of the extruder, and a rotating shaft of the first rotating motor is fixedly connected to the top of the main extrusion motor.

[0022] Furthermore, the lower docking shaft is rotatably connected with a locking piece, and the top of the locking piece is slidably connected to the top of the main housing of the extruder.

[0023] Furthermore, the extrusion structure also includes a main extrusion gear and a tension wheel, the gear is rotatably connected to the rotating shaft of the main extrusion motor, the main extrusion motor is fixedly connected to a side docking shaft, the side docking shaft is rotatably connected to a U-shaped tension wheel bracket, the tension wheel is rotatably connected to the tension wheel bracket, the main extrusion gear and the tension wheel are located on the same side, and an extrusion gap is formed between the main extrusion gear and the tension wheel;

[0024] The rod body of the extruder feeding rod is symmetrically provided with second inner recesses, the printing wire is connected with the two second inner recesses, the main extrusion gear and the tensioning wheel are respectively located in the two second inner recesses and are in contact with the printing wire.

[0025] Furthermore, a second rotary motor is installed on one side of the main extrusion motor, an adjusting gear is fixedly connected to the rotating shaft of the second rotary motor, and an engaging portion engaged with the adjusting gear is provided at one end of the tension wheel bracket.

[0026] Furthermore, the wire material box is formed by splicing a main docking wire material box and a plurality of auxiliary docking wire material boxes. A docking slot is provided on the top of the main docking wire material box, and a fixed buckle is snapped into the docking slot.

[0027] Furthermore, the tops of the multiple extruder feeding rods are fixedly connected with a material break detector, and the multiple material break detectors are provided with a third through-hole for the printing wire to pass through.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In the present invention, when it is necessary to change the printing wire of another color for printing, the extrusion gap is widened from narrow under the cooperation of the second rotating motor, the adjusting gear, the meshing part and the tension wheel bracket. At the same time, as the feeder shift plate rotates, the inclined surface of the ejector will squeeze the inner edge, so that the extruder feed rod is squeezed out of the feed rod receiving groove, and as the feeder shift plate continues to rotate, the outer wall of the extruder feed rod will be re-slidably connected with the outer wall of the feeder shift plate. While extruding, the reciprocating slide bar at the bottom of the extruder feed rod will slide inward along the sliding groove, and the spring is compressed at this time;

[0031] At the same time, the replacement and discharge of the printing wire are completed with the cooperation of the first rotating motor, the feeder shift plate, the extrusion structure and the dynamic adjustment structure.

[0032] Second, in the present invention, by adjusting the coordination between the gear and the meshing part, the width of the extrusion gap can be flexibly changed, so that the extruder feed rod can enter and exit the extrusion gap.

[0033] 3. In the present invention, when disassembly is required, the upper end cover of the extruder can be separated from the main housing of the extruder by simply canceling the engagement of the upper end cover of the extruder through the buckle, thereby improving the disassembly efficiency.

[0034] 4. In the present invention, the extruder feed rod can be limited by the provided rod limiting groove, and the contact area between the extruder feed rod and the rod limiting groove can be increased by the two first inner recesses, thereby improving the stability of the extruder feed rod when sliding in the rod limiting groove.

[0035] 5. In the present invention, multiple extruder feeding rods are provided to facilitate the staff to install printing wires of different colors on the extruder feeding rods.

[0036] 6. In the present invention, by setting a material break detector, when there is no printed wire at the third through hole, the material break detector will give an alarm to remind the staff to check. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A three-dimensional schematic diagram of the present invention as a whole;

[0038] Figure 2 It is a schematic diagram of the main housing of the extruder in the present invention;

[0039] Figure 3 It is a bottom view of the main housing of the extruder in the present invention;

[0040] Figure 4 It is an exploded schematic diagram of the main housing of the extruder, the receiving card plate and the upper end cover of the extruder in the present invention;

[0041] Figure 5It is an exploded schematic diagram of the main housing of the extruder, the receiving card plate and the upper end cover of the extruder in the present invention from a bottom-up perspective;

[0042] Figure 6 It is an exploded schematic diagram of the printing wire, the receiving card plate and the extruder feeding rod in the present invention;

[0043] Figure 7 It is a schematic diagram of the extrusion structure in the present invention;

[0044] Figure 8 It is a schematic diagram of the printing wire, extruder feed rod and extrusion structure in the present invention;

[0045] Fig. 9 It is a cutaway view of the main housing of the extruder in the present invention;

[0046] Fig.10 It is a schematic diagram of the receiving card plate, the feeder shift plate, the main extrusion motor and the lower docking shaft in the present invention;

[0047] Fig.11 It is a schematic diagram of the extruder feeding rod and the feeder shifting plate in the present invention;

[0048] Fig.12 It is a schematic diagram of the extrusion structure of the present invention when it is working;

[0049] Fig.13 It is a schematic diagram of the main docking wire material box in the present invention;

[0050] Fig.14 It is a schematic diagram of the secondary docking wire material box in the present invention.

[0051] In the figure: 1. Extruder main body; 2. Printing wire; 3. Undertaking card plate; 4. Material rod limit slot; 5. Extruder feed rod; 6. Feeder shift plate; 7. Feed rod receiving slot; 8. Ejector; 9. Buckle; 10. Extruder upper end cover; 11. Fixed buckle; 12. Wire material box; 13. First through hole; 14. Second through hole; 15. Third through hole; 16. Inner edge; 17. Reciprocating slide rod; 18. Spring; 19. Sliding slot; 20. The first inner recess; 21, main extrusion motor; 22, lower docking shaft; 23, first rotary motor; 24, locking plate; 25, main extrusion gear; 26, tensioning wheel; 27, side docking shaft; 28, tensioning wheel bracket; 29, extrusion gap; 30, second inner recess; 31, second rotary motor; 32, adjusting gear; 33, meshing part; 34, main docking wire box; 35, secondary docking wire box; 36, docking slot; 37, material break detector. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Embodiment 1

[0054] like Figure 1-Figure 14 As shown, an integrated extruder for 3D printing includes an extruder main housing 1 and a printing wire 2. The top of the extruder main housing 1 is clamped with an extruder upper end cover 10. Specifically: Figure 2 As shown, the main housing 1 of the extruder is connected to the upper end cover 10 of the extruder by means of a buckle 9. When disassembly is required, the upper end cover 10 of the extruder can be separated from the main housing 1 of the extruder by simply canceling the engagement of the upper end cover 10 of the extruder by means of the buckle 9. Figure 2-Figure 7 As shown, a receiving card plate 3 is fixedly mounted on the main housing 1 of the extruder, and a plurality of rod limiting grooves 4 are circumferentially arranged on the receiving card plate 3, and a plurality of extruder feeding rods 5 corresponding to the rod limiting grooves 4 are slidably connected on the receiving card plate 3, and the extruder feeding rods 5 are slidably connected to the corresponding rod limiting grooves 4; specifically: Figure 8 and Fig.11 As shown, the rod body of the extruder feeding rod 5 is symmetrically provided with first inner recesses 20, and the extruder feeding rod 5 is slidably connected with the corresponding rod limiting groove 4 through the two first inner recesses 20. The extruder feeding rod 5 can be limited by the set rod limiting groove 4, and the contact area between the extruder feeding rod 5 and the rod limiting groove 4 can be increased by the two first inner recesses 20, thereby improving the stability of the extruder feeding rod 5 when sliding in the rod limiting groove 4, and the top of the inner wall of the two first inner recesses 20 is in sliding contact with the upper surface of the receiving clamping plate 3.

[0055] like Fig.11 As shown, a plurality of extruder feed rods 5 are provided with a first opening 13, such as Figure 5 As shown, the bottom of the main housing 1 of the extruder is provided with a plurality of second through-holes 14 corresponding to the first through-holes 13 one by one;

[0056] When discharging, the free end of the printing wire 2 passes through the first opening 13 and the second opening 14 in turn, and then passes through the extruder main housing 1 and the extruder feeding rod 5. By setting up multiple extruder feeding rods 5, it is convenient for the staff to install printing wires 2 of different colors on the extruder feeding rod 5.

[0057] The receiving card plate 3 is rotatably connected to an extrusion structure for extruding the printing wire 2, and the bottom of the receiving card plate 3 is rotatably connected to a feeder shift plate 6 fixedly connected to the extrusion structure; specifically: Figure 7 Shown and Fig. 9 The extrusion structure includes a main extrusion motor 21, a lower docking shaft 22 is fixedly connected to the bottom of the main extrusion motor 21, the bottom end of the lower docking shaft 22 passes through the receiving card plate 3, the feeder shift plate 6 and the extruder main housing 1 and extends outside, the lower docking shaft 22 is rotatably connected to a locking piece 24 for limiting the lower docking shaft 22, the top of the locking piece 24 is slidably connected to the top of the extruder main housing 1, and the lower docking shaft 22 is fixedly connected to the feeder shift plate 6;

[0058] The main extrusion motor 21 is in sliding contact with the receiving card plate 3;

[0059] The extruder upper end cover 10 is equipped with a first rotary motor 23 , and the rotary shaft of the first rotary motor 23 is fixedly connected to the top of the main extrusion motor 21 .

[0060] Further, such as Figure 7 As shown, the extrusion structure also includes a main extrusion gear 25 and a tension wheel 26, the gear is rotatably connected to the rotating shaft of the main extrusion motor 21, the main extrusion motor 21 is fixedly connected to a side docking shaft 27, the side docking shaft 27 is rotatably connected to a U-shaped tension wheel bracket 28, the tension wheel 26 is rotatably connected to the tension wheel bracket 28, the main extrusion gear 25 and the tension wheel 26 are located on the same side, and an extrusion gap 29 is formed between the main extrusion gear 25 and the tension wheel 26;

[0061] like Figure 8 and Fig.11 As shown, the rod body of the extruder feeding rod 5 is symmetrically provided with second inner recesses 30 , the printing wire 2 is connected with the two second inner recesses 30 , the main extrusion gear 25 and the tensioning wheel 26 are respectively located in the two second inner recesses 30 , and are both in contact with the printing wire 2 .

[0062] Further, such as Figure 7 As shown, a second rotary motor 31 is installed on one side of the main extrusion motor 21 , an adjusting gear 32 is fixedly connected to the rotating shaft of the second rotary motor 31 , and an engaging portion 33 engaged with the adjusting gear 32 is provided at one end of the tension wheel bracket 28 .

[0063] A feeding rod receiving groove 7 is provided on the feeder shift plate 6, and the feeding rod receiving groove 7 is connected to one of the feed rod limiting grooves 4; Figure 7 , Fig.10 and Fig.12As shown, when the feed rod receiving groove 7 is connected to one of the material rod limiting grooves 4, the feed rod receiving groove 7 and the material rod limiting groove 4 connected to the feed rod receiving groove 7 are slidably connected with the same extruder feed rod 5, and the inclined surface of the ejector 8 is in sliding contact with the side of the inner edge 16 of the bottom of the extruder feed rod 5; the outer wall of the remaining extruder feed rod 5 is slidably connected with the outer wall of the feeder shift plate 6;

[0064] like Fig.11 As shown, the bottom of the feeder shift plate 6 is provided with an ejector 8 for ejecting the extruder feed rod 5 in the feed rod receiving groove 7, and the ejector 8 is triangular in shape. The bottoms of multiple extruder feed rods 5 are all provided with inner edges 16, and the upper surface of the inner edge 16 is slidably connected to the lower surface of the feeder shift plate 6. The bottom of the extruder main housing 1 is provided with multiple dynamic adjustment structures corresponding to the extruder feed rods 5 one by one, and one side of the dynamic adjustment structure is fixedly connected to the corresponding extruder feed rod 5. The dynamic adjustment structure is used to dynamically adjust the position of the extruder feed rod 5 according to the connection state between the feed rod receiving groove 7 and the feed rod limiting groove 4; specifically: Figure 8 and Fig. 9 As shown, the dynamic adjustment structure includes a reciprocating slide bar 17 and a spring 18. The bottom of the extruder feeding rod 5 is fixedly connected with the reciprocating slide bar 17, and the reciprocating slide bar 17 is L-shaped. The bottom of the extruder main housing 1 is provided with a plurality of sliding grooves 19 corresponding to the reciprocating slide bar 17, and the sliding grooves 19 are all inserted with springs 18. The transverse rod body of the reciprocating slide bar 17 is slidably connected in the corresponding sliding groove 19, and the end portion is in contact with the spring 18 in the sliding groove 19. When the outer wall of the extruder feeding rod 5 is slidably connected with the outer wall of the feeder shift plate 6, the spring 18 is in a compressed state.

[0065] Specifically: Figure 7 and Figure 8 As shown, the adjusting gear 32 is driven to rotate by the rotating shaft of the second rotating motor 31, and under the meshing action with the meshing portion 33, the tensioning wheel bracket 28 rotates in the opposite direction with the side docking shaft 27 as the rotation center, and the tensioning wheel 26 also rotates in the same direction, and the extrusion gap 29 becomes wider from narrow;

[0066] At the same time, the first rotary motor 23 drives the main extrusion motor 21 to rotate counterclockwise through the rotary shaft, and the main extrusion motor 21 drives the feeder shift plate 6 to rotate in the same direction through the lower docking shaft 22. When the feed rod receiving slot 7 is connected to the feed rod limiting slot 4 where the required printing wire 2 is located, the spring 18 in the compressed state is stretched and reset, and pushes the reciprocating slide bar 17 to push along the direction of the feed rod receiving slot 7, and then pushes the extruder feed rod 5 into the extrusion gap 29. At this time, the rotary shaft of the second rotary motor 31 drives the adjusting gear 32 to rotate in the opposite direction and reset. Under the meshing action with the meshing part 33, the tensioning wheel bracket 28 rotates in the opposite direction with the side docking shaft 27 as the rotation center, thereby resetting, and the tensioning wheel 26 also rotates in the same direction. Figure 4 As shown, at this time, the extrusion gap 29 becomes narrower from wide, and the main extrusion gear 25 and the tension wheel 26 tightly clamp the printing wire 2. The main extrusion motor 21 drives the main extrusion gear 25 to rotate counterclockwise through the rotating shaft, thereby applying an upward thrust to the printing wire 2, so that the printing wire 2 is continuously sent out;

[0067] When it is necessary to change the printing wire 2 of another color for printing, the extrusion gap 29 is widened from narrow under the cooperation of the second rotary motor 31, the adjusting gear 32, the meshing part 33, and the tension wheel bracket 28. At the same time, as the feeder shift plate 6 rotates, the inclined surface of the ejector 8 squeezes the inner edge 16, so that the extruder feed rod 5 is extruded from the feed rod receiving groove 7, and as the feeder shift plate 6 continues to rotate, the outer wall of the extruder feed rod 5 will be slidably connected with the outer wall of the feeder shift plate 6 again. While extruding, the reciprocating slide bar 17 at the bottom of the extruder feed rod 5 will slide inward along the slide groove 19, and the spring 18 is compressed at this time;

[0068] At the same time, the replacement of the printing wire 2 is completed with the cooperation of the first rotating motor 23, the feeder shift plate 6, the extrusion structure and the dynamic adjustment structure;

[0069] In the present invention, switching can be performed by setting an extrusion structure and a dynamic adjustment structure, which is convenient and quick.

[0070] Embodiment 2

[0071] like Figure 1-Figure 14 As shown, this embodiment is improved as follows based on the first embodiment: Figure 1 , Figure 3 and Fig.14 As shown, a fixing buckle 11 is fixedly connected to the bottom of the main housing 1 of the extruder, and a wire material box 12 is clamped to the fixing buckle 11, and a printing wire 2 is placed in the wire material box 12;

[0072] Furthermore, the wire material box 12 is composed of a main docking wire material box 34 and a plurality of auxiliary docking wire material boxes 35. A docking slot 36 is provided on the top of the main docking wire material box 34. The fixing buckle 11 is snapped into the docking slot 36 to fix the main shell 1 of the extruder. When in use, it is only necessary to snap different numbers of auxiliary docking wire material boxes 35 together with the main docking wire material box 34 to quickly complete the installation, which is convenient and quick.

[0073] Embodiment 3

[0074] like Figure 1-Figure 14 As shown, this embodiment is improved on the basis of the first embodiment as follows: Further, as Figure 6 As shown, the tops of multiple extruder feeding rods 5 are fixedly connected with a feed break detector 37, and multiple feed break detectors 37 are provided with a third through-hole 15 for the printing wire 2 to pass through. When discharging, the free end of the printing wire 2 passes through the first through-hole 13, the second through-hole 14 and the third through-hole 15 in sequence. When there is no printing wire 2 in the third through-hole 15, the feed break detector 37 will alarm to remind the staff to check.

[0075] In summary, the workflow of the present invention is:

[0076] Pull out the printing wire 2 from the corresponding main docking wire material box 34 or the auxiliary docking wire material box 35, and pass the free end through the corresponding first through-hole 13, the second through-hole 14 and the third through-hole 15 in sequence, and finally connect the free end to the printing device to start the 3D printing work;

[0077] When feeding, the rotating shaft of the second rotating motor 31 drives the adjusting gear 32 to rotate. Under the meshing action with the meshing portion 33, the tensioning wheel bracket 28 rotates with the side docking shaft 27 as the rotation center, and the tensioning wheel 26 also rotates in the same direction. At this time, the extrusion gap 29 changes from narrow to wide;

[0078] At the same time, the first rotary motor 23 drives the main extrusion motor 21 to rotate counterclockwise through the rotating shaft, and the main extrusion motor 21 drives the feeder shift plate 6 to rotate in the same direction through the lower docking shaft 22. When the feed rod receiving slot 7 is connected to the feed rod limiting slot 4 where the required printing wire 2 is located, the spring 18 in the compressed state is stretched and reset, and pushes the reciprocating slide bar 17 to push along the direction of the feed rod receiving slot 7, and then pushes the extruder feed rod 5 into the extrusion gap 29. At this time, the rotation of the second rotary motor 31 The shaft drives the adjusting gear 32 to rotate in the reverse direction and reset. Under the meshing action with the meshing part 33, the tension wheel bracket 28 rotates in the reverse direction with the side docking shaft 27 as the rotation center, thereby resetting. The tension wheel 26 also rotates in the same direction. At this time, the extrusion gap 29 becomes narrower from wide. At this time, the main extrusion gear 25 and the tension wheel 26 tightly clamp the printing wire 2. The main extrusion motor 21 drives the main extrusion gear 25 to rotate counterclockwise through the rotating shaft, thereby applying an upward thrust to the printing wire 2, so that the printing wire 2 is continuously sent out;

[0079] When it is necessary to change the printing wire 2 of another color for printing, the extrusion gap 29 is widened from narrow under the cooperation of the second rotary motor 31, the adjusting gear 32, the meshing part 33, and the tension wheel bracket 28. At the same time, as the feeder shift plate 6 rotates, the inclined surface of the ejector 8 squeezes the inner edge 16, so that the extruder feed rod 5 is extruded from the feed rod receiving groove 7, and as the feeder shift plate 6 continues to rotate, the outer wall of the extruder feed rod 5 will be slidably connected with the outer wall of the feeder shift plate 6 again. While extruding, the reciprocating slide bar 17 at the bottom of the extruder feed rod 5 will slide inward along the slide groove 19, and the spring 18 is compressed at this time;

[0080] At the same time, the replacement of the printing wire 2 is completed with the cooperation of the first rotary motor 23, the feeder shift plate 6, the extrusion structure and the dynamic adjustment structure.

[0081] However, as is well known to those skilled in the art, the working principles and wiring methods of the main extrusion motor 21, the first rotary motor 23, the second rotary motor 31 and the material break detector 37 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0082] The above different embodiments can be combined, replaced and used in conjunction with each other.

[0083] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated extruder for 3D printing, characterized in that: The invention comprises an extruder main housing (1) and a printing wire (2), wherein an extruder upper end cover (10) is clamped on the top of the extruder main housing (1), a receiving card plate (3) is fixedly mounted on the extruder main housing (1), and a plurality of material rod limiting grooves (4) are circumferentially arranged on the receiving card plate (3), a plurality of extruder feeding rods (5) corresponding to the material rod limiting grooves (4) are slidably connected to the receiving card plate (3), and the extruder feeding rods (5) are slidably connected to the corresponding material rod limiting grooves (4); An extrusion structure for extruding the printing wire (2) is rotatably connected to the receiving card plate (3), and a feeder shift plate (6) fixedly connected to the extrusion structure is rotatably connected to the bottom of the receiving card plate (3); The feeder shift plate (6) is provided with a feed rod receiving groove (7), and the feed rod receiving groove (7) is connected to one of the feed rod limiting grooves (4); wherein, when the feed rod receiving groove (7) is connected to one of the feed rod limiting grooves (4), the feed rod receiving groove (7) and the feed rod limiting groove (4) connected to the feed rod receiving groove (7) are slidably connected to the same extruder feed rod (5), and the outer wall of the remaining extruder feed rods (5) is slidably connected to the outer wall of the feeder shift plate (6); The bottom of the feeder shift plate (6) is provided with an ejector (8), and the ejector (8) is used to eject the extruder feed rod (5) in the feed rod receiving groove (7). The bottom of the extruder main housing (1) is provided with a plurality of dynamic adjustment structures corresponding to the extruder feed rods (5), one side of the dynamic adjustment structure is fixedly connected to the corresponding extruder feed rod (5), and the dynamic adjustment structure is used to dynamically adjust the position of the extruder feed rod (5) according to the connection state between the feed rod receiving groove (7) and the feed rod limiting groove (4); The free end of the printing wire (2) passes through the extruder main housing (1) and the extruder feed rod (5) in sequence; The extrusion structure comprises a main extrusion motor (21), the bottom of the main extrusion motor (21) is fixedly connected to a lower docking shaft (22), the bottom end of the lower docking shaft (22) passes through the receiving card plate (3), the feeder shift plate (6) and the extruder main housing (1) and extends outside, and the lower docking shaft (22) is fixedly connected to the feeder shift plate (6); The main extrusion motor (21) is in sliding contact with the receiving clamping plate (3); The extruder upper end cover (10) is equipped with a first rotating motor (23), and the rotating shaft of the first rotating motor (23) is fixedly connected to the top of the main extrusion motor (21); The extrusion structure further comprises a main extrusion gear (25) and a tension wheel (26), wherein the gear is rotatably connected to the rotating shaft of the main extrusion motor (21), a side docking shaft (27) is fixedly connected to the main extrusion motor (21), a U-shaped tension wheel bracket (28) is rotatably connected to the side docking shaft (27), and the tension wheel (26) is rotatably connected to the tension wheel bracket (28), the main extrusion gear (25) and the tension wheel (26) are located on the same side, and an extrusion gap (29) is formed between the main extrusion gear (25) and the tension wheel (26); The extruder feed rod (5) has a rod body symmetrically provided with second inner recesses (30), the printing wire (2) is connected to the two second inner recesses (30), and the main extrusion gear (25) and the tensioning wheel (26) are respectively located in the two second inner recesses (30) and are in contact with the printing wire (2); A second rotary motor (31) is mounted on one side of the main extrusion motor (21); an adjusting gear (32) is fixedly connected to the rotary shaft of the second rotary motor (31); and an engaging portion (33) engaged with the adjusting gear (32) is provided at one end of the tension wheel bracket (28).

2. An integrated extruder for 3D printing according to claim 1, characterized in that: The extruder main housing (1) is snap-connected to the extruder upper end cover (10) via a snap buckle (9); A fixing buckle (11) is fixedly connected to the bottom of the extruder main housing (1), and a wire material box (12) is clamped to the fixing buckle (11), and a printing wire (2) is placed in the wire material box (12); A first through-hole (13) is formed on each of the plurality of extruder feed rods (5), and a plurality of second through-holes (14) corresponding one to one with the first through-holes (13) are formed on the bottom of the main housing (1) of the extruder; One end of the printing wire (2) passes through the first through-hole (13) and the second through-hole (14) in sequence.

3. An integrated extruder for 3D printing according to claim 1, characterized in that: The ejector (8) is triangular in shape, and the bottoms of the plurality of extruder feed rods (5) are each provided with an inner edge (16), the upper surface of the inner edge (16) is slidably connected to the lower surface of the feeder shift plate (6), and the inclined surface of the ejector (8) is in slidable contact with the side surface of one of the inner edges (16); The dynamic adjustment structure comprises a reciprocating slide bar (17) and a spring (18); the bottom of the extruder feeding rod (5) is fixedly connected to the reciprocating slide bar (17); the reciprocating slide bar (17) is L-shaped; the bottom of the extruder main housing (1) is provided with a plurality of sliding grooves (19) corresponding to the reciprocating slide bars (17); springs (18) are inserted into the sliding grooves (19); the transverse rod body of the reciprocating slide bar (17) is slidably connected in the corresponding sliding groove (19), and the end portion thereof abuts against the spring (18) in the sliding groove (19).

4. The integrated extruder for 3D printing according to claim 1, characterized in that: The extruder feed rod (5) has a rod body symmetrically provided with first inner recesses (20), and the extruder feed rod (5) is slidably connected to the corresponding feed rod limit grooves (4) via the two first inner recesses (20), and the tops of the inner walls of the two first inner recesses (20) are in slidable contact with the upper surface of the receiving clamping plate (3).

5. The integrated extruder for 3D printing according to claim 1, characterized in that: The lower docking shaft (22) is rotatably connected to a locking plate (24), and the top of the locking plate (24) is slidably connected to the top of the extruder main housing (1).

6. An integrated extruder for 3D printing according to claim 2, characterized in that: The wire material box (12) is formed by splicing a main docking wire material box (34) and a plurality of auxiliary docking wire material boxes (35); a docking slot (36) is provided on the top of the main docking wire material box (34), and the fixing buckle (11) is clamped in the docking slot (36).

7. An integrated extruder for 3D printing according to claim 1, characterized in that: The tops of the plurality of extruder feed rods (5) are all fixedly connected to a material break detector (37), and the plurality of material break detectors (37) are all provided with a third through hole (15) for the printing wire (2) to pass through.

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