A seamless thermal connection device for consumables of a gun-type 3D printer

Abstract

The invention discloses a gun-type 3D printer consumables seamless thermal connection device, comprising a heating coil, a transmission gear, a material wire clamping device, a one-way transmission ratchet device, a bracket handle and a rack trigger; the heating coil is located below the material wire clamping device, the transmission gear, the material wire clamping device and the one-way transmission ratchet device are respectively connected to the bracket handle, and the rack trigger is connected to the bracket handle through a slide groove; the one-way transmission ratchet device is respectively meshed with the rack trigger and the transmission gear, and the transmission gear is meshed with the gear part of the material wire clamping device, which effectively avoids the interference of artificial factors, achieves more accurate automatic positioning of the connected material wire, and can ensure that the connection requirements are met to the greatest extent, which not only greatly reduces the mistakes of manual connection, but also improves the connection efficiency and connection quality; and the device has a simple structure and its working cost is relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printers, in particular to a seamless thermal connection device for consumables of a gun-type 3D printer. Background Art

[0002] With the advancement of science and technology and the further development of the manufacturing industry, a new type of manufacturing method has emerged: 3D printing. 3D printing (3DP) is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer.

[0003] The current 3D printers are roughly divided into the following three types according to the technical categories: 1. FDM: Fused Deposition Modeling, the main materials are ABS and PLA. 2. SLA: Stereolithography, the main material is photosensitive resin. 3. 3DP: Three-dimensional powder bonding, the main material is powder materials, such as ceramic powder, metal powder, plastic powder.

[0004] The present application mainly relates to a 3D printer of fused deposition rapid prototyping type, and its consumables are mainly filaments of ABS or PLA materials. In the operation of the 3D printer of fused deposition rapid prototyping type, the filaments are heated by the nozzle, and the filaments are squeezed into the nozzle under the extrusion of the driving roller. The nozzle moves along the specified contour path, thereby printing out the entity layer by layer on the platform. After each deposition of a surface is completed, the nozzle rises a layer height by a predetermined amount, and then continues to melt-spray deposition until the shape of the entire entity is completed. Since the consumables of the fused deposition rapid prototyping type 3D printer are filaments, it is necessary to wrap a long section of filaments around a disc. When a disc of filaments is used up or needs to be replaced, it is necessary to manually withdraw the original filaments from the guide sleeve, replace them with new filaments, and then control the feed motor to drive the roller to deliver the new filaments to the nozzle, and then print normally. However, this material replacement process often produces gaps, which will directly affect the new filaments when they continue to work, and they cannot be accurately connected to the breakpoint of the previous disc, resulting in the new printing layer being unable to be well connected to the previous printing layer, and finally resulting in the failure of the entity printing.

[0005] In order to solve the above technical problems, the following solutions are adopted in the prior art: when the material wire needs to be replaced, the head end of the new material wire and the tail end of the replaced material wire are fixed in a groove, the two cross sections are manually aligned, and the wire is melted into a whole wire by heating, thereby fundamentally avoiding the problem of loose connection and fault caused by the replacement of the new and old material wires. However, the existing 3D printer consumables heating device has the following problems: First, when it is necessary to melt and connect material wires of different diameters, the diameter of the groove needs to be quickly adjusted according to the diameter of the material wire; second, the connection device is relatively simple, and the two material wires are mostly manually aligned, resulting in inaccurate cross-sectional connection of the two material wires, and burrs are easily formed at the connection, affecting the next step of printing. Summary of the invention

[0006] The present invention aims at the fact that under the condition that the working principle of the existing 3D printer consumables thermal connection device remains unchanged, the diameter of the molten material wire is limited and the cross-section docking is inaccurate, which will increase burrs and other unnecessary interference factors at the connection of the material wire during the molten connection, thereby affecting the bonding tightness of the fault connection of the printed model and the quality of the overall printing. The present invention provides a new gun-type 3D printer consumables seamless thermal connection device with simple structure and low cost, which can effectively improve the thermal connection quality of the material wire and the aesthetic appearance of the overall printing.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a gun-type 3D printer consumables seamless thermal connection device, including a heating coil, a transmission gear, a material wire clamping device, a one-way transmission ratchet device, a bracket handle and a rack trigger; the heating coil is located below the material wire clamping device, the transmission gear, the material wire clamping device, and the one-way transmission ratchet device are respectively connected to the bracket handle, and the rack trigger is connected to the bracket handle through a slide groove; the one-way transmission ratchet device is respectively meshed with the rack trigger and the transmission gear, and the transmission gear is meshed with the gear part of the material wire clamping device, thereby pushing the material wire along a specified path to a heating area to perform thermal connection of the material wire.

[0008] As a further improvement of the above technical solution, the one-way transmission ratchet device includes an inner ring and an outer ring; the inner ring is connected to the rack trigger through gear meshing, and the outer ring is connected to the transmission gear through gear meshing. The one-way transmission ratchet device also includes a pawl and a spring steel sheet; the pawl is distributed on the inner ring and is controlled to spring up by the spring steel sheet, and when the inner ring rotates counterclockwise, the popped-up pawl drives the outer ring to rotate. When the inner ring rotates clockwise, the pawl slides on the inclined surface and cannot drive the outer ring to rotate, thus realizing the one-way transmission of the one-way transmission ratchet device.

[0009] As a further improvement of the above technical solution, the rack trigger is also connected with a reset spring, and the reset spring can reset the rack trigger.

[0010] As a further improvement of the above technical solution, the material wire clamping device includes a pressure cover, a guide groove and a guide clamping device; the pressure cover is arranged at the upper part of the guide clamping device, the guide groove is arranged between the guide clamping device and the gear part and is located at the lower part of the pressure cover; the gear part is meshed with the outer ring.

[0011] As a further improvement of the above technical solution, the guide clamping device includes a spring and a guide wheel; the spring is connected to the bracket handle; the guide wheel is arranged at a position opposite to the gear part through a guide wheel bracket.

[0012] As a further improvement of the above technical solution, the gear portion and the guide wheel are both provided with grooves, and the grooves clamp the material wire.

[0013] As a further improvement of the above technical solution, the groove of the gear part is provided with evenly distributed protrusions along the circumference. When the material wires have different diameters, the guide wheel automatically presses the material wires under the action of the spring and automatically aligns the two material wires.

[0014] As a further improvement of the above technical solution, the gun-type 3D printer consumables seamless thermal connection device is also provided with a gear cover, and the gear cover is arranged on the upper part of the bracket handle.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention effectively avoids the interference of human factors, achieves more accurate automatic positioning of the connecting material wire, and can ensure that the connection requirements are met to the greatest extent. This not only greatly reduces the errors of manual connection, but also improves the connection efficiency and connection quality; and the device has a simple structure and its working cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall appearance diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the present invention;

[0018] Figure 3 is a top view of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the one-way transmission ratchet device of the present invention;

[0020] Figure 5 It is a schematic diagram of the connection structure between the one-way transmission ratchet device and the rack trigger of the present invention;

[0021] Figure 6 It is the front view of the present invention

[0022] Figure 7 The present invention Figure 6 A partial enlarged view of middle A.

[0023] In the accompanying drawings: 1 is a heating coil, 2 is a transmission gear, 3 is a material wire clamping device, 4 is a one-way transmission ratchet device, 5 is a bracket handle, 6 is a rack trigger, 7 is a gear cover, 31 is a pressure cover, 32 is a guide groove, 33 is a spring, 34 is a guide wheel, 35 is a guide wheel bracket, 36 is a gear part, 41 is an inner ring, 42 is an outer ring, 43 is a ratchet, 44 is a spring steel sheet, and 61 is a reset spring. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] See also Figure 1-7 As shown, a gun-type 3D printer consumables seamless thermal connection device includes a heating coil 1, a transmission gear 2, a material wire clamping device 3, a one-way transmission ratchet device 4, a bracket handle 5 and a rack trigger 6; the heating coil 1 is located below the material wire clamping device 3, the transmission gear 2, the material wire clamping device 3, and the one-way transmission ratchet device 4 are respectively connected to the bracket handle 5, and the rack trigger 6 is connected to the bracket handle 5 through a slide groove; the one-way transmission ratchet device 4 is respectively engaged with the rack trigger 6 and the transmission gear 2, and the transmission gear 2 is engaged with the gear part 36 of the material wire clamping device 3, and then the material wire is pushed to the heating area along the specified path, so that the material wire can be thermally connected. In the above embodiment, the transmission gear 2 and the one-way transmission ratchet device 4 are connected to the bracket handle 5 through a shaft, and the material wire clamping device 3 is connected to the bracket handle 5 through a shaft or a spring.

[0026] See also Figure 4 and 5 As shown, the one-way transmission ratchet device 4 includes an inner ring 41 and an outer ring 42; the inner ring 41 is connected to the rack trigger 6 through gear meshing, and the outer ring 42 is connected to the transmission gear 2 through gear meshing.

[0027] The one-way transmission ratchet device 4 also includes a pawl 43 and a spring steel sheet 44; the pawl 43 is distributed on the inner ring 41 and is controlled to bounce up by the spring steel sheet 44. In the above embodiment, three pawls are provided, and the three pawls are kept always bounced up by the spring steel sheet; when in use, when the inner ring 41 rotates counterclockwise, the bounced pawl 43 drives the outer ring 42 to rotate. When the inner ring 41 rotates clockwise, the pawl slides on the inclined surface and cannot drive the outer ring 42 to rotate, thus realizing the one-way transmission of the one-way transmission ratchet device. See Figure 2 and 3 As shown, the rack trigger 6 is also connected with a reset spring 61, and the reset spring 61 can reset the rack trigger 6. When the rack trigger 6 moves to the right, the outer ring 42 moves normally, and when the rack trigger 6 moves to the left under the action of the reset spring 61, the outer ring 42 does not move.

[0028] See also Figure 1 and 2 As shown, the material wire clamping device 3 includes a pressure cover 31, a guide groove 32 and a guide clamping device; the pressure cover 31 is arranged at the upper part of the guide clamping device, the guide groove 32 is arranged between the guide clamping device and the gear part and is located at the lower part of the pressure cover 31; the gear part is meshed with the outer ring 42.

[0029] The guide clamping device includes a spring 33 and a guide wheel 34 ; the spring 33 is connected to the bracket handle 5 ; the guide wheel 34 is arranged at a position opposite to the gear part 36 through a guide wheel bracket 35 .

[0030] In the above embodiment, the gear portion and the guide wheel are both provided with grooves, and the grooves clamp the material wire.

[0031] The groove of the gear part is provided with evenly distributed protrusions along the circumference. The gear part includes gear 1 and gear 2. When in use, when the material wires have different diameters, the guide wheel 34 automatically presses the material wires under the action of the spring 33 to automatically align the two material wires.

[0032] See also Figure 1 As shown, the gun-type 3D printer consumables seamless thermal connection device is also provided with a gear cover 7, and the gear cover 7 is arranged on the upper part of the bracket handle 5.

[0033] When the gun-type 3D printer consumables seamless thermal connection device is working, firstly, the pressure cover 31 is rotated upward to open, and two material wires are respectively inserted from the two ends of the guide groove 32. When the material wire moves between the guide wheel 34 and the gear part, under the action of the spring 33, the guide wheel 34 will tightly clamp the material wire between the gear part 36, and the grooves provided in the guide wheel 34 and the gear part 36 will clamp the material wire. The lower end of the inner ring 41 is provided with a gear. The rack trigger 6 is pulled to move to the right, and the rack meshes with the inner ring 41. The outer ring 42 is meshed with the transmission gear 2 and the gear part respectively, and finally, the gear part 36 is moved counterclockwise and clockwise respectively. The groove of the gear part 36 is provided with evenly distributed protrusions along the circumference, which drives the material wire to move toward the heating coil 1 while rotating. When the rack trigger 6 moves to the right to the maximum stroke, the rack trigger 6 is released. Under the action of the reset spring 61, the rack trigger 6 will automatically move to the left to the initial position, and the outer ring 42 does not move at this time. The rack trigger 6 is pulled again to move to the right, and the gear part 36 continues to drive the material wire to move toward the heating coil 1 until the two material wires are in contact. At this time, the pressure cover 31 is rotated downward to press the material wire, and the heating coil 1 is powered on.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A seamless thermal connection device for 3D printer consumables. It is characterized in that The invention comprises a heating coil (1), a transmission gear (2), a material wire clamping device (3), a one-way transmission ratchet device (4), a bracket handle (5) and a rack trigger (6); the heating coil (1) is located below the material wire clamping device (3); the transmission gear (2), the material wire clamping device (3) and the one-way transmission ratchet device (4) are respectively connected to the bracket handle (5); the rack trigger (6) is connected to the bracket handle (5) through a slide groove; the one-way transmission ratchet device (4) is respectively meshed with the rack trigger (6) and the transmission gear (2); the transmission gear (2) is meshed with the gear part (36) of the material wire clamping device (3); The one-way transmission ratchet device (4) comprises an inner ring (41) and an outer ring (42); the inner ring (41) is connected to the rack trigger (6) through gear meshing, and the outer ring (42) is connected to the transmission gear (2) through gear meshing; The one-way transmission ratchet device (4) further comprises a pawl (43) and a spring steel sheet (44); the pawl (43) is distributed on the inner ring (41) and is controlled to spring up by the spring steel sheet (44); The rack trigger (6) is also connected to a return spring (61); The wire material clamping device (3) comprises a pressure cover (31), a guide groove (32) and a guide clamping device; the pressure cover (31) is arranged on the upper part of the guide clamping device, and the guide groove (32) is arranged between the guide clamping device and the gear part (36) and is located at the lower part of the pressure cover (31); The guide clamping device comprises a spring (33) and a guide wheel (34); the spring (33) is connected to the bracket handle (5); the guide wheel (34) is arranged at a position opposite to the gear part (36) through a guide wheel bracket (35).

2. A seamless thermal connection device for consumables of a gun-type 3D printer according to claim 1, It is characterized in that The gear portion (36) and the guide wheel (34) are both provided with grooves.

3. A seamless thermal connection device for consumables of a gun-type 3D printer according to claim 2, It is characterized in that The groove of the gear part (36) is provided with protrusions evenly distributed along the circumference.

4. A seamless thermal connection device for consumables of a gun-type 3D printer according to any one of claims 1 to 3, It is characterized in that The gun-type 3D printer consumables seamless thermal connection device is also provided with a gear cover (7).

5. A seamless thermal connection device for consumables of a gun-type 3D printer according to claim 4, It is characterized in that The gear cover (7) is arranged on the upper part of the bracket handle (5).

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