CN213472211U - Macro-micro combined 3D printing mechanism - Google Patents
Macro-micro combined 3D printing mechanism Download PDFInfo
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- CN213472211U CN213472211U CN202021744648.7U CN202021744648U CN213472211U CN 213472211 U CN213472211 U CN 213472211U CN 202021744648 U CN202021744648 U CN 202021744648U CN 213472211 U CN213472211 U CN 213472211U
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- piezoelectric pump
- fixed
- gear
- printing
- friction wheel
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- 238000010146 3D printing Methods 0.000 title claims abstract description 24
- 238000007639 printing Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000001125 extrusion Methods 0.000 claims description 11
- 210000004907 gland Anatomy 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 abstract description 6
- 206010013642 Drooling Diseases 0.000 abstract description 4
- 208000008630 Sialorrhea Diseases 0.000 abstract description 4
- 239000013589 supplement Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000007493 shaping process Methods 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 1
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Abstract
The invention discloses a macro-micro combined 3D printing mechanism, aiming at solving the problems of printing breakpoints when the wire withdrawal amount is large and wire drooling when the wire withdrawal amount is small when the current 3D printer is switched between printing and non-printing. The invention comprises a transmission device, a tensioning device, a macroscopic solid plunger type wire feeding device and a microscopic piezoelectric pump type wire feeding device. According to the invention, the friction wheel and the tension wheel are driven by forward rotation of the driving motor to be matched, so that solid wires push liquid wires to realize stable wire discharge of the 3D printer nozzle, the driving motor is driven to rotate reversely when the solid wires are drawn back to drive the single needle roller bearing to further drive the transmission mechanism to realize solid wire supplement in the microscopic piezoelectric pump, and meanwhile, the wires in a melting cavity above the piezoelectric pump are sucked into the pump cavity through continuous deformation of the piezoelectric ceramic chip in the piezoelectric pump and are simultaneously transmitted to the nozzle to realize micro supplement of the molten wires of the nozzle, so that the printing breakpoint phenomenon and the wire drooling phenomenon can be simultaneously solved.
Description
Technical Field
The invention relates to a macro-micro combined 3D printing mechanism, and belongs to the technical field of 3D printing.
Background
The 3D printer is used as a high-tech device, and comprehensively applies a plurality of scientific and technical aspects such as CAD technology, CAM technology, laser, photochemistry, material science and the like. With the continuous progress of the 3D printing technology, the 3D printer based on the FDM technology is widely applied, and the method puts higher requirements on a core mechanism, namely an extrusion mechanism, of the 3D printer. The 3D printer based on the FDM technology mainly adopts a mode that a friction wheel is matched with an auxiliary wheel to convey solid filaments to a heating cavity to push the internal molten filaments to be extruded from a nozzle and then to be stacked into a new workpiece. In the process of 3D printer shaping work piece, there is the switching process that extruding means goes out the silk continuously and prints and stops that the silk is empty to be walked, most extruding means all adopt macroscopically accurate control send a motor to realize the stable transport and the stop transport of silk material, send a motor forward to realize stably sending a silk, utilize the motor reversal to drive solid-state silk material pumpback to realize stopping to go out the silk when stopping, this kind of method leads to the big extruding means of solid-state silk material pumpback volume to appear printing breakpoint phenomenon, the silk material drooling phenomenon appears in solid-state silk material pumpback volume for a short time. These two phenomena limit the development of 3D printers based on FDM technology.
Disclosure of Invention
The 3D printer is used as a high-tech device, and comprehensively applies a plurality of scientific and technical aspects such as CAD technology, CAM technology, laser, photochemistry, material science and the like. With the continuous progress of the 3D printing technology, the 3D printer based on the FDM technology is widely applied, and the method puts higher requirements on a core mechanism, namely an extrusion mechanism, of the 3D printer. The 3D printer based on the FDM technology mainly adopts a mode that a friction wheel is matched with an auxiliary wheel to convey solid filaments to a heating cavity to push the internal molten filaments to be extruded from a nozzle and then to be stacked into a new workpiece. In the process of 3D printer shaping work piece, there is the switching process that extruding means goes out the silk continuously and prints and stops that the silk is empty to be walked, most extruding means all adopt macroscopically accurate control send a motor to realize the stable transport and the stop transport of silk material, send a motor forward to realize stably sending a silk, utilize the motor reversal to drive solid-state silk material pumpback to realize stopping to go out the silk when stopping, this kind of method leads to the big extruding means of solid-state silk material pumpback volume to appear printing breakpoint phenomenon, the silk material drooling phenomenon appears in solid-state silk material pumpback volume for a short time. These two phenomena limit the development of 3D printers based on FDM technology.
The transmission device 1 consists of a driving motor 1-1, a jackscrew 1-2, a long friction wheel 1-3, a gear 1-4, a gearbox side sealing plate 1-5, a secondary rotating gear 1-6, a wire inlet pipe 1-7, an additional pinion 1-8, a primary rotating gear 1-9, an upper cover plate 1-10, a supporting block 1-11, a middle rotating shaft 1-12, a fixed shaft 1-13, a one-way bearing 1-14 and a short friction wheel 1-15, wherein the driving motor 1-1 and the long friction wheel 1-3 are fixedly connected through the jackscrew 1-2, the long friction wheel 1-3 and the primary rotating gear 1-9 are fixedly connected through the jackscrew 1-2, the primary rotating gear 1-9 is meshed with the additional pinion 1-8, the auxiliary pinion 1-8 is fixedly connected with the middle rotating shaft 1-12 through a jackscrew 1-2, the auxiliary pinion 1-8 is fixed on the middle rotating shaft 1-12 through a jackscrew 1-2, the front end and the rear end of the middle rotating shaft 1-12 are respectively fixed on two bearings through interference fit, the two bearings are respectively fixed on a supporting block 1-11 and a side sealing plate 1-5 of a gearbox through interference fit, the secondary rotating gear 1-6 is fixed on the middle rotating shaft 1-12 through a jackscrew 1-2, the secondary rotating gear 1-6 is meshed with a gear 1-4, the gear 1-4 is fixed on a fixed shaft 1-13 through a jackscrew 1-2, the front end and the rear end of the fixed shaft 1-13 are fixed on the two bearings through interference fit, the two bearings are respectively fixed on a supporting block 1-11 and a gearbox side sealing plate 1-5 in an interference fit manner, the one-way bearing 1-14 is fixed on a fixed shaft 1-13, the short friction wheel 1-15 is fixed on the one-way bearing 1-14 through a jackscrew 1-2, the gearbox side sealing plate (1-5) is connected with the supporting block (1-11) through screw fastening, the driving motor (1-1) is connected with the supporting block (1-11) through screw fastening, the upper cover plate (1-10) is connected with the supporting block (1-11) through screw fastening, the wire inlet pipe 1-7 is in clearance fit with the upper cover plate 1-10, the driving motor 1-1 controls the long friction wheel 1-3 and the primary rotating gear 1-9, wherein the long friction wheel 1-3, the tension wheel 2-3 extrudes the printing material, the primary rotating gear 1-9 is meshed with the additional pinion 1-8 at the same time, the power is transmitted to a secondary rotating gear 1-6 through an intermediate rotating shaft 1-12, the secondary rotating gear 1-6 is meshed with a gear 1-4, the gear 1-4 is fixed on a fixed shaft 1-13 through a jackscrew to drive the gear 1-4 to rotate, a one-way bearing 1-14 is fixed on the fixed shaft 1-13, a short friction wheel 1-15 is fixed on the one-way bearing 1-14 through the jackscrew to realize that the short friction wheel 1-15 is still when a driving motor 1-1 drives a printing material to enter a heating block 3-3, when the driving motor 1-1 controls the printing material to be pumped back, the short friction wheel 1-15 sends the material into the cavity of the piezoelectric pump 3-9 through the transmission of the gear set.
The tensioning device 2 comprises a tensioning wheel frame 2-1, a double-head screw 2-2, tensioning wheels 2-3, a pin shaft 2-4 and a ball angle 2-5, the double-head screw 2-2 is in threaded fit with the ball angle 2-5, the ball angle 2-5 is in clearance fit with the tensioning wheel frame 2-1, the tensioning wheels 2-3 are fixed on supporting blocks 1-11 through the cooperation of the pin shaft 2-4 and a clamping spring, the double-head screw 2-2 is rotated to enable the two tensioning wheel frames 2-1 to be far away from each other, and the movement of the tensioning wheel frame 2-1 drives the two tensioning wheels 2-3 at the left end and the right end to enable the tensioning wheels 2-3 to approach to a friction wheel, so that the left printing material and the right printing.
The extrusion device 3 consists of a throat pipe 3-1, a heating rod 3-2, a heating block 3-3, a nozzle 3-4, a double connecting pipe 3-5, a piezoelectric pump 3-6, a piezoelectric pump cavity 3-6-1, a semilunar island 3-6-1, a piezoelectric sheet 3-6-2, a ceramic pipe 3-6-3, a gland 3-6-4, a piezoelectric pump outer frame 3-7 and a piezoelectric pump throat pipe 3-8, wherein the throat pipe 3-1 is connected with the double connecting pipe 3-5, the double connecting pipe 3-5 is connected with the nozzle 3-4, the piezoelectric pump throat pipe 3-8 is connected with the piezoelectric pump outer frame 3-6 through interference fit with the piezoelectric pump outer frame 3-7, the piezoelectric pump outer frame 3-7 is connected with the piezoelectric pump cavity 3-6-1 through interference fit, the piezoelectric pump comprises a piezoelectric pump outer frame 3-7, a double connecting pipe 3-5, a ceramic pipe 3-6-3 and a gland 3-6-4, wherein the piezoelectric pump outer frame is connected with the double connecting pipe 3-5, the ceramic pipe 3-6-3 is connected with the gland 3-6-4 in an interference fit mode, a piezoelectric sheet 3-6-2 is tightly pressed on a piezoelectric pump cavity 3-6-1 through the gland 3-6-4, a semilunar island 3-6-1-1 is built in the piezoelectric pump cavity, and a heating rod 3-2 is in contact with a heating block 3-3 through a.
Drawings
FIG. 1 is a schematic diagram illustrating the overall structure of a macro-micro combined 3D printing mechanism according to the present invention;
fig. 2 is a schematic structural diagram (a) of an actuator 1 of a macro-micro combined 3D printing mechanism according to the present invention;
fig. 3 is a schematic structural diagram (b) of an actuator 1 of a macro-micro combined 3D printing mechanism according to the present invention;
fig. 4 is a schematic structural diagram (c) of the transmission device 1 of the macro-micro combined 3D printing mechanism according to the present invention;
fig. 5 is a schematic structural diagram of a tensioning device 2 of a macro-micro combined 3D printing mechanism according to the present invention;
fig. 6 is a schematic structural diagram of an extrusion device 3 of a macro-micro combined 3D printing mechanism according to the present invention;
FIG. 7 is a schematic diagram showing the structure of a piezoelectric pump 3-6 of an extrusion device 3 of a macro-micro combined 3D printing mechanism according to the present invention;
FIG. 8 is a schematic structural diagram of a meniscus island 3-6-1-1 of an extrusion device 3 of a macro-micro combined 3D printing mechanism according to the present invention;
Detailed Description
The embodiment is described with reference to fig. 1 to 8, and the embodiment provides a specific embodiment of an extrusion mechanism of a full-color single-nozzle 3D printer, which is described as follows:
participate in fig. 1 a macroscopical microcosmic 3D printing mechanism that combines which characterized in that: the macro-micro combined 3D printing mechanism consists of a transmission device 1, a tensioning device 2 and an extrusion device 3, wherein the supporting blocks 1-11 are connected with the throat pipe 3-1 in an interference fit manner.
Participate in fig. 2, 3, 4 a macroscopical microcosmic combination 3D printing mechanism, characterized by: the transmission device 1 comprises a driving motor 1-1, a jackscrew 1-2, a long friction wheel 1-3, a gear 1-4, a gearbox side sealing plate 1-5, a secondary rotating gear 1-6, a wire inlet pipe 1-7, an additional pinion 1-8, a primary rotating gear 1-9, an upper cover plate 1-10, a supporting block 1-11, a middle rotating shaft 1-12, a fixed shaft 1-13, a one-way bearing 1-14 and a short friction wheel 1-15, wherein the driving motor 1-1 and the long friction wheel 1-3 are fixedly connected through the jackscrew 1-2, the long friction wheel 1-3 and the primary rotating gear 1-9 are fixedly connected through the jackscrew 1-2, the primary rotating gear 1-9 is meshed with the additional pinion 1-8, the auxiliary pinion 1-8 is fixedly connected with the middle rotating shaft 1-12 through a jackscrew 1-2, the auxiliary pinion 1-8 is fixed on the middle rotating shaft 1-12 through a jackscrew 1-2, the front end and the rear end of the middle rotating shaft 1-12 are respectively fixed on two bearings through interference fit, the two bearings are respectively fixed on a supporting block 1-11 and a side sealing plate 1-5 of a gearbox through interference fit, the secondary rotating gear 1-6 is fixed on the middle rotating shaft 1-12 through a jackscrew 1-2, the secondary rotating gear 1-6 is meshed with a gear 1-4, the gear 1-4 is fixed on a fixed shaft 1-13 through a jackscrew 1-2, the front end and the rear end of the fixed shaft 1-13 are fixed on the two bearings through interference fit, the two bearings are respectively fixed on a supporting block 1-11 and a side sealing plate 1-5 of the gearbox through interference fit, the one-way bearing 1-14 is fixed on a fixed shaft 1-13, the short friction wheel 1-15 is fixed on the one-way bearing 1-14 through a jackscrew 1-2, the bolt connects the side sealing plate 1-5 of the gearbox with the supporting block 1-11 through screw thread fastening, the bolt connects a driving motor 1-1 with the supporting block 1-11 through screw thread fastening, the bolt connects an upper cover plate 1-10 with the supporting block 1-11 through screw thread fastening, the wire inlet pipe 1-7 is in clearance fit with the upper cover plate 1-10, the driving motor 1-1 controls a long friction wheel 1-3 and a long friction wheel 1-3 in a primary rotating gear 1-9, the tension wheel 2-3 extrudes the printing material, the primary rotating gear 1-9 is meshed with the additional pinion 1-8 at the same time, the power is transmitted to a secondary rotating gear 1-6 through an intermediate rotating shaft 1-12, the secondary rotating gear 1-6 is meshed with a gear 1-4, the gear 1-4 is fixed on a fixed shaft 1-13 through a jackscrew to drive the gear 1-4 to rotate, a one-way bearing 1-14 is fixed on the fixed shaft 1-13, a short friction wheel 1-15 is fixed on the one-way bearing 1-14 through the jackscrew to realize that the short friction wheel 1-15 is still when a driving motor 1-1 drives a printing material to enter a heating block 3-3, when the driving motor 1-1 controls the printing material to be pumped back, the short friction wheel 1-15 sends the material into the cavity of the piezoelectric pump 3-9 through the transmission of the gear set.
Participate in fig. 5 a macroscopical microcosmic 3D printing mechanism that its characterized in that: the tensioning device 2 comprises a tensioning wheel frame 2-1, a double-head screw 2-2, tensioning wheels 2-3, a pin shaft 2-4 and a ball angle 2-5, the double-head screw 2-2 is in threaded fit with the ball angle 2-5, the ball angle 2-5 is in clearance fit with the tensioning wheel frame 2-1, the tensioning wheels 2-3 are fixed on supporting blocks 1-11 through the cooperation of the pin shaft 2-4 and a clamping spring, the double-head screw 2-2 is rotated to enable the two tensioning wheel frames 2-1 to be far away from each other, and the movement of the tensioning wheel frame 2-1 drives the two tensioning wheels 2-3 at the left end and the right end to enable the tensioning wheels 2-3 to approach to a friction wheel, so that the left printing material and the right printing.
Participate in fig. 6, 7, 8 a macroscopical microcosmic 3D printing mechanism that characterized in that: the extrusion device 3 consists of a throat pipe 3-1, a heating rod 3-2, a heating block 3-3, a nozzle 3-4, a double connecting pipe 3-5, a piezoelectric pump 3-6, a piezoelectric pump cavity 3-6-1, a semilunar island 3-6-1, a piezoelectric sheet 3-6-2, a ceramic pipe 3-6-3, a gland 3-6-4, a piezoelectric pump outer frame 3-7 and a piezoelectric pump throat pipe 3-8, wherein the throat pipe 3-1 is connected with the double connecting pipe 3-5, the double connecting pipe 3-5 is connected with the nozzle 3-4, the piezoelectric pump throat pipe 3-8 is connected with the piezoelectric pump outer frame 3-6 through interference fit with the piezoelectric pump outer frame 3-7, the piezoelectric pump outer frame 3-7 is connected with the piezoelectric pump cavity 3-6-1 through interference fit, the piezoelectric pump comprises a piezoelectric pump outer frame 3-7, a double connecting pipe 3-5, a ceramic pipe 3-6-3 and a gland 3-6-4, wherein the piezoelectric pump outer frame is connected with the double connecting pipe 3-5, the ceramic pipe 3-6-3 is connected with the gland 3-6-4 in an interference fit mode, a piezoelectric sheet 3-6-2 is tightly pressed on a piezoelectric pump cavity 3-6-1 through the gland 3-6-4, a semilunar island 3-6-1-1 is built in the piezoelectric pump cavity, and a heating rod 3-2 is in contact with a heating block 3-3 through a.
Claims (3)
1. The utility model provides a macroscopical microcosmic 3D printing mechanism that combines together which characterized in that: the macro-micro combined 3D printing mechanism comprises a transmission device (1), a tensioning device (2) and an extrusion device (3), wherein supporting blocks (1-11) in the transmission device (1) are connected with a throat pipe (3-1) in an interference fit mode, the transmission device (1) comprises a driving motor (1-1), jackscrews (1-2), long friction wheels (1-3), gears (1-4), a gear box side sealing plate (1-5), a secondary rotating gear (1-6), a wire inlet pipe (1-7), an additional pinion (1-8), a primary rotating gear (1-9), an upper cover plate (1-10), supporting blocks (1-11), a middle rotating shaft (1-12), a fixing shaft (1-13), a one-way bearing (1-14), The friction wheel type gear transmission comprises short friction wheels (1-15), a driving motor (1-1) and a long friction wheel (1-3) are fixedly connected through jackscrews (1-2), the long friction wheel (1-3) is fixedly connected with a primary rotating gear (1-9) through jackscrews (1-2), the primary rotating gear (1-9) is meshed with an additional pinion (1-8), the additional pinion (1-8) is fixedly connected with a middle rotating shaft (1-12) through jackscrews (1-2), the additional pinion (1-8) is fixed on the middle rotating shaft (1-12) through jackscrews (1-2), the front end and the rear end of the middle rotating shaft (1-12) are fixed on two bearings through interference fit respectively, and the two bearings are fixed on a supporting block (1-11) and a gear box (1-5) through interference fit respectively ) The two-stage rotating gear (1-6) is fixed on the middle rotating shaft (1-12) through a jackscrew (1-2), the two-stage rotating gear (1-6) is meshed with the gear (1-4), the gear (1-4) is fixed on a fixed shaft (1-13) through the jackscrew (1-2), the front end and the rear end of the fixed shaft (1-13) are fixed on two bearings through interference fit, the two bearings are respectively fixed on a supporting block (1-11) and a gearbox side sealing plate (1-5) through interference fit, a one-way bearing (1-14) is fixed on the fixed shaft (1-13), a short friction wheel (1-15) is fixed on the one-way bearing (1-14) through the jackscrew (1-2), and the gearbox side sealing plate (1-5) is connected with the supporting block (1-11) through screw thread fastening, the printing machine is characterized in that the driving motor (1-1) is fixedly connected with the supporting blocks (1-11) through threads, the upper cover plate (1-10) is fixedly connected with the supporting blocks (1-11) through threads, the wire feeding pipe (1-7) is in clearance fit with the upper cover plate (1-10), the driving motor (1-1) controls the long friction wheel (1-3) and the primary rotating gear (1-9), the long friction wheel (1-3) is arranged in the long friction wheel, the tension wheel (2-3) extrudes printing materials, the primary rotating gear (1-9) is meshed with the additional pinion (1-8), power is transmitted to the secondary rotating gear (1-6) through the middle rotating shaft (1-12), and the secondary rotating gear (1-6) is meshed with the gear (1-4), the gear (1-4) is fixed on the fixed shaft (1-13) through a jackscrew to drive the gear (1-4) to rotate, the one-way bearing (1-14) is fixed on the fixed shaft (1-13), the short friction wheel (1-15) is fixed on the one-way bearing (1-14) through the jackscrew, so that the short friction wheel (1-15) is stationary while the driving motor (1-1) drives the printing material to enter the heating block (3-3), and when the driving motor (1-1) controls the printing material to be pumped back, the short friction wheel (1-15) sends the material into the cavity of the piezoelectric pump (3-6) through the transmission of the gear set.
2. A macro-micro combination 3D printing mechanism as claimed in claim 1, wherein: the tensioning device (2) consists of a tensioning wheel frame (2-1), a double-end screw (2-2), a tensioning wheel (2-3), a pin shaft (2-4) and a ball corner (2-5), the double-end screw (2-2) is in threaded fit with the ball corner (2-5), the ball corner (2-5) is in clearance fit with the tensioning wheel frame (2-1), the tensioning wheel (2-3) is fixed on a supporting block (1-11) through the fit of the pin shaft (2-4) and a clamping spring, the rotation enables the two tensioning wheel frames (2-1) to be far away from each other by rotating the double-end screw (2-2), the two tensioning wheels (2-3) at the left end and the right end are driven by the movement of the tensioning wheel frame (2-1), so that the tensioning wheel (2-3) is close to a friction wheel, the left printing material and the right printing material are clamped simultaneously.
3. A macro-micro combination 3D printing mechanism as claimed in claim 1, wherein: the extrusion device (3) consists of a throat pipe (3-1), a heating rod (3-2), a heating block (3-3), a nozzle (3-4), a double connecting pipe (3-5), a piezoelectric pump (3-6), a piezoelectric pump cavity (3-6-1), a semilunar island (3-6-1-1), a piezoelectric sheet (3-6-2), a ceramic pipe (3-6-3), a gland (3-6-4), a piezoelectric pump outer frame (3-7), a piezoelectric pump throat pipe (3-8), the throat pipe (3-1) is connected with the double connecting pipe (3-5), the double connecting pipe (3-5) is connected with the nozzle (3-4), the piezoelectric pump throat pipe (3-8) is connected with the piezoelectric pump (3-6) through the interference fit of the piezoelectric pump outer frame (3-7), the piezoelectric pump comprises a piezoelectric pump outer frame (3-7), a piezoelectric pump cavity (3-6-1), a piezoelectric pump outer frame (3-7), a double connecting pipe (3-5), a ceramic pipe (3-6-3), a gland (3-6-4), a piezoelectric sheet (3-6-2), a semilunar island (3-6-1-1) and a heating rod (3-2), wherein the piezoelectric pump outer frame (3-7) is connected with the piezoelectric pump cavity (3-6-1) in an interference fit mode, the piezoelectric sheet (3-6-2) is tightly pressed on the piezoelectric pump cavity (3-6-1) through the gland (3-6-4), the semilunar island (3-6-1-1) is built in the piezoelectric pump cavity, and the heating rod (3-2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020200605791 | 2020-01-11 | ||
| CN202020060579 | 2020-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213472211U true CN213472211U (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021744648.7U Expired - Fee Related CN213472211U (en) | 2020-01-11 | 2020-08-20 | Macro-micro combined 3D printing mechanism |
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| CN (1) | CN213472211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245915A (en) * | 2023-10-16 | 2023-12-19 | 成都飞机工业（集团）有限责任公司 | Butt joint device and method for 3D printing wire |
-
2020
- 2020-08-20 CN CN202021744648.7U patent/CN213472211U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245915A (en) * | 2023-10-16 | 2023-12-19 | 成都飞机工业（集团）有限责任公司 | Butt joint device and method for 3D printing wire |
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Granted publication date: 20210618 |