Fold line distribution five-nozzle dynamic temperature control same-layer co-melting 3D printing spray head

Abstract

The invention provides a broken line distribution five-nozzle dynamic temperature control same-layer co-melting 3D printing spray head which comprises a supporting platform, an upper fixing platform, a lower fixing platform, heat dissipation fins and a heating device fixing platform, four nozzles in the five nozzles can independently ascend and descend, synchronous discharging can be achieved under cooperation of a five-motor independent driving feeding mechanism, and the five nozzles are independently driven by a motor to independently ascend and descend. Wire conveying, copper pipe embedded type heat dissipation, segmented throat pipe, independent temperature control heating device and nozzle execution units are integrated from top to bottom, through mechanical locking of a lifting mechanism and five-channel precise temperature control, a co-melting temperature field is formed by adjacent wires on the same layer, the efficiency bottleneck of traditional single-nozzle operation is broken through, and the working efficiency is improved. Meanwhile, molecular-level fusion between wires on the same layer is achieved, and synchronous breakthrough of the printing speed and the forming strength is achieved, that is, the adjacent wires in the same layer are located in a co-melting temperature field through a multi-nozzle synchronous heating co-printing technology, the molecular permeation effect of a melt interface is remarkably enhanced, and the interface bonding quality of the structure on the same layer is fundamentally improved; and meanwhile, the printing speed is greatly increased.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing technology, and in particular to a 3D printing nozzle with five nozzles distributed in a broken line and dynamically temperature-controlled and fused in the same layer. Background Art

[0002] With the advancement of technology, multi-nozzle 3D printing technology has emerged. Multi-nozzle 3D printing technology is achieved by installing multiple nozzles on a 3D printer, with each nozzle responsible for spraying different materials, so that multiple materials can be used on the same layer. After research, the inventors of this application found that the current multi-nozzle 3D printing system is limited by the physical gap of the linear layout and the single nozzle's alternating discharge mode, which not only leads to low printing efficiency, but also because there is a significant temperature difference between adjacent wires in the same layer (the later discharged wire contacts the cooled surface), resulting in insufficient diffusion of molecular chains between the molten materials, which directly weakens the bonding strength between wires in the same layer. Summary of the Invention

[0003] In order to address the technical problem that the existing multi-nozzle 3D printing system is limited by the physical gap of the linear layout and the single nozzle rotation discharge mode, which not only leads to low printing efficiency, but also due to the significant temperature difference between adjacent wires in the same layer (the later discharged wire contacts the cooled surface), the molecular chain diffusion between the molten materials is insufficient, which directly weakens the bonding strength between the wires in the same layer. The present invention provides a five-nozzle dynamic temperature control same-layer fusion 3D printing nozzle with a broken line distribution.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with folded distribution, including a support platform, an upper fixed platform, a lower fixed platform, a heat dissipation fin and a heating device fixed platform;

[0006] Five wire feeding ports are vertically penetrated on the support platform, and five feed drive motors are firmly installed on the support platform. The output shafts of the feed drive motors are connected to drive gears via drive rods. Feed gears and feed pulleys are cooperatively clamped and fixed on the upper fixed platform and the lower fixed platform. The feed gears and drive gears are meshed for transmission. The feed gears and feed pulleys cooperate to form a wire clamping area, and the entrance of the wire clamping area is opposite to the wire feeding port on the support platform;

[0007] Four nozzle lifting column drive motors are fixedly mounted on the top surface of the heat dissipation fins. The output shafts of the nozzle lifting column drive motors are driven and connected to the nozzle lifting column transmission belts. The nozzle lifting column transmission belts pass through preset holes in the heat dissipation fins. A wire channel opposite to the outlet of the wire clamping area is provided inside the heat dissipation fins. A plurality of heat dissipation copper tubes are also embedded inside the heat dissipation fins, and a heat dissipation fan is configured outside to form a heat dissipation system.

[0008] The heating device fixing platform is a fixing platform with a heat insulation function. A nozzle lifting column driving gear is fixed on the surface of the heating device fixing platform. The gear shaft of the nozzle lifting column driving gear is sleeved with the lower end of the nozzle lifting column transmission belt passing through the preset hole in the heat dissipation fin. Five independent heating devices are isolated and fixed on the bottom surface of the heating device fixing platform. An optical axis throat pipe is fastened to any one of the heating devices through a throat screw. A threaded throat pipe is connected between the heat dissipation fin and the remaining four heating devices through a threaded connection. The upper ends of the optical axis throat pipe and the threaded throat pipe correspond to the heat dissipation fins provided inside the heat dissipation fins. The wire channel is connected, and the lower ends of the optical axis throat and the threaded throat are respectively connected to the wire heating channel provided in the heating device. The heating device fixed platform and the remaining four heating devices are movably penetrated by a nozzle lifting column. The upper part of the nozzle lifting column is engaged with the nozzle lifting column driving gear. The lower part of the nozzle lifting column is provided with an internal flow channel with the upper end penetrating the side wall of the nozzle lifting column. The nozzle lifting column can be lowered to a predetermined position to allow the internal flow channel to be coaxially aligned with the wire heating channel to realize continuous extrusion of the melt, and can also be raised to a set height to allow the internal flow channel to be misaligned with the wire heating channel to realize mechanical shutoff and locking.

[0009] Compared with the prior art, the present invention provides a five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with broken line distribution, in which four nozzles can be raised and lowered independently, and can realize synchronous discharging with the cooperation of five motor-driven feeding mechanisms. It integrates wire transportation from top to bottom - copper tube embedded heat dissipation - segmented throat - independent temperature control heating device - nozzle execution unit, and through the mechanical locking of the lifting mechanism (lifting and closing the nozzle) and the five-channel precise temperature control, the adjacent wires in the same layer form a fusion temperature field, breaking through the efficiency bottleneck of traditional single-nozzle operation, and realizing molecular-level fusion between the wires in the same layer at the same time, achieving a simultaneous breakthrough in printing speed and molding strength. So far, the present invention uses multi-nozzle synchronous heating co-printing technology to put the adjacent wires in the same layer in a fusion temperature field, significantly strengthening the molecular penetration effect of the melt interface, fundamentally improving the interface bonding quality of the same-layer structure, and greatly improving the printing speed.

[0010] Furthermore, a pressure spring is cooperatively clamped and fixed on the upper fixed platform and the lower fixed platform, and the rotating column of the feed pulley is connected to one end of the pressure spring through a semicircular pressure-bearing saddle.

[0011] Furthermore, the output shaft of the nozzle lifting column drive motor is directly connected to the nozzle lifting column transmission belt.

[0012] Furthermore, the output shaft of the nozzle lifting column drive motor is connected to the bridge transmission shaft rigidly fixed on the top surface of the heat dissipation fin through a transition transmission belt, and the upper end of the nozzle lifting column transmission belt is sleeved on the bridge transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the first three-dimensional structure of the five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle provided by the present invention.

[0014] Figure 2 This is a schematic diagram of the second three-dimensional structure of the folded line distributed five-nozzle dynamic temperature control same-layer fusion 3D printing nozzle provided by the present invention.

[0015] Figure 3 yes Figure 1 Schematic diagram of the enlarged cross-sectional structure in the AA direction.

[0016] Figure 4 yes Figure 1 Schematic diagram of the enlarged cross-sectional structure in the middle BB direction.

[0017] Figure 5 yes Figure 2 Schematic diagram of the enlarged cross-sectional structure in the CC direction.

[0018] Figure 6 yes Figure 2 Schematic diagram of the enlarged cross-sectional structure in the DD direction.

[0019] Figure 7 It is an enlarged view of the positional relationship among the driving gear, feed gear and feed pulley provided by the present invention.

[0020] In the figure, 1. Support platform; 11. Wire feed port; 12. Feed drive motor; 13. Drive gear; 2. Upper fixed platform; 21. Feed gear; 22. Feed pulley; 23. Pressure spring; 24. Semicircular pressure saddle; 3. Lower fixed platform; 4. Heat dissipation fins; 41. Nozzle lifting column drive motor; 42. Nozzle lifting column drive belt; 43. Wire channel; 44. Heat dissipation copper tube; 45. Transition drive belt; 46. Bridge drive shaft; 5. Heating device fixed platform; 51. Nozzle lifting column drive gear; 52. Heating device; 521. Wire heating channel; 53. Throat screw; 54. Optical axis throat; 55. Threaded throat; 56. Nozzle lifting column; 561. Internal flow channel. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0022] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] Please refer to Figures 1 to 7 As shown, the present invention provides a five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with broken line distribution, including a support platform 1, an upper fixed platform 2, a lower fixed platform 3, a heat dissipation fin 4 and a heating device fixed platform 5;

[0025] Five wire feeding ports 11 are vertically penetrated on the support platform 1, and five feed drive motors 12 are firmly installed on the support platform 1. The output shaft of the feed drive motor 12 is connected to the drive gear 13 via a drive rod. The upper fixed platform 2 and the lower fixed platform 3 are cooperatively clamped and fixed with a feed gear 21 and a feed pulley 22. The feed gear 21 and the drive gear 13 are engaged for transmission, that is, the feed gear 21 and the drive gear 13 form a meshing transmission relationship. The feed gear 21 and the feed pulley 22 cooperate to form a wire clamping area, and the entrance of the wire clamping area is opposite to the wire feeding port 11 on the support platform 1. Therefore, under the drive of the output shaft of the feed drive motor 12, the feed gear 21 can be driven to rotate by the drive gear 13, and the wire entering from the wire feeding port 11 can be clamped through the wire clamping area;

[0026] Four nozzle lifting column drive motors 41 are fixedly mounted on the top surface of the heat sink fins 4. The output shafts of the nozzle lifting column drive motors 41 are connected to a nozzle lifting column transmission belt 42. The nozzle lifting column transmission belt 42 passes through a preset hole in the heat sink fins 4. A wire channel 43 is provided inside the heat sink fins 4, opposite to the outlet of the wire clamping area. A plurality of heat dissipation copper tubes 44 are also embedded inside the heat sink fins 4. A heat dissipation fan (not shown) is also provided outside the heat sink fins 4 to form a heat dissipation system.

[0027] The heating device fixing platform 5 is a fixed platform with a heat insulation function. A nozzle lifting column driving gear 51 is fixed on the surface of the heating device fixing platform 5. The gear shaft of the nozzle lifting column driving gear 51 is sleeved with the lower end of the nozzle lifting column transmission belt 42 passing through the preset hole in the heat dissipation fin 4. Five independent heating devices 52 are isolated and fixed on the bottom surface of the heating device fixing platform 5. An optical axis throat 54 is fastened to any one of the heating devices 52 through a throat screw 53. The heat dissipation fin 4 and the remaining four heating devices are fixed to the bottom surface of the heating device fixing platform 5. The devices 52 are connected by a threaded throat 55, that is, the threaded throat 55 is threadedly connected to the heat sink 4 and the remaining four heating devices 52 through the threads at both ends thereof. The upper ends of the optical axis throat 54 and the threaded throat 55 are respectively connected to the wire channels 43 provided inside the heat sink 4, so that the wires in the wire clamping area can pass through the wire channels 43 and enter the optical axis throat 54 and the threaded throat 55. The lower ends of the optical axis throat 54 and the threaded throat 55 are respectively connected to the wire channels 43 provided inside the heating device 52. The wire heating channel 521 inside is connected so that the incoming wire can be heated and melted through the wire heating channel 521. A nozzle lifting column 56 is movably passed through the heating device fixing platform 5 and the remaining four heating devices 52. The upper part of the nozzle lifting column 56 is engaged with the nozzle lifting column driving gear 51. The lower part of the nozzle lifting column 56 is provided with an internal flow channel 561 whose upper end passes through the side wall of the nozzle lifting column 56. The nozzle lifting column 56 can be lowered to a predetermined position to make the internal flow channel 561 coaxially aligned with the wire heating channel 521 to achieve continuous extrusion of the melt, or it can be raised to a set height to make the internal flow channel 561 and the wire heating channel 521 misaligned to achieve mechanical shutoff and locking. Therefore, the nozzle lifting column 56 has two working states: a working position and a locking position. The descent and ascent of the nozzle lifting column 56 are specifically achieved by the nozzle lifting column driving motor 41 driving the nozzle lifting column driving gear 51 to rotate through the nozzle lifting column transmission belt 42, and the nozzle lifting column driving gear 51 rotates and drives the nozzle lifting column 56 engaged therewith.

[0028] Compared with the prior art, the present invention provides a five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with broken line distribution, in which four nozzles can be raised and lowered independently, and can realize synchronous discharging with the cooperation of five motor-driven feeding mechanisms. It integrates wire transportation from top to bottom - copper tube embedded heat dissipation - segmented throat - independent temperature control heating device - nozzle execution unit, and through the mechanical locking of the lifting mechanism (lifting and closing the nozzle) and the five-channel precise temperature control, the adjacent wires in the same layer form a fusion temperature field, breaking through the efficiency bottleneck of traditional single-nozzle operation, and realizing molecular-level fusion between the wires in the same layer at the same time, achieving a simultaneous breakthrough in printing speed and molding strength. So far, the present invention uses multi-nozzle synchronous heating co-printing technology to put the adjacent wires in the same layer in a fusion temperature field, significantly strengthening the molecular penetration effect of the melt interface, fundamentally improving the interface bonding quality of the same-layer structure, and greatly improving the printing speed.

[0029] As a specific example, please refer to Figure 7 As shown, the upper fixed platform 2 and the lower fixed platform 3 are also cooperatively clamped and fixed with a pressure spring 23, and the rotating column of the feed pulley 22 is connected to one end of the pressure spring 23 through a semicircular pressure-bearing saddle 24, that is, one end of the pressure spring 23 is connected to the semicircular pressure-bearing saddle 24, and the other end of the pressure spring 23 is cooperatively clamped and fixed by the upper fixed platform 2 and the lower fixed platform 3, thereby ensuring that the wire is stably transported through the wire clamping area.

[0030] As a specific embodiment, please refer to Figure 5 As shown, the output shaft of the nozzle lifting column driving motor 41 is directly connected to the nozzle lifting column transmission belt 42 , thereby realizing a direct drive configuration driving connection for the nozzle lifting column transmission belt 42 .

[0031] As another specific embodiment, the output shaft of the nozzle lifting column drive motor 41 is connected to the bridge drive shaft 46 rigidly fixed on the top surface of the heat sink fin 4 through a transition drive belt 45, and the upper end of the nozzle lifting column drive belt 42 is sleeved on the bridge drive shaft 46, so that the output shaft of the nozzle lifting column drive motor 41 drives the transition drive belt 45 to link the bridge drive shaft 46, and drives the nozzle lifting column drive belt 42 to rotate through the bridge drive shaft 46, thereby realizing the bridge configuration drive connection of the nozzle lifting column drive belt 42.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with broken line distribution, characterized in that: It includes a supporting platform, an upper fixing platform, a lower fixing platform, a heat dissipation fin and a heating device fixing platform; Five wire feeding ports are vertically penetrated on the support platform, and five feed drive motors are firmly installed on the support platform. The output shafts of the feed drive motors are connected to drive gears via drive rods. Feed gears and feed pulleys are cooperatively clamped and fixed on the upper fixed platform and the lower fixed platform. The feed gears and drive gears are meshed for transmission. The feed gears and feed pulleys cooperate to form a wire clamping area, and the entrance of the wire clamping area is opposite to the wire feeding port on the support platform; Four nozzle lifting column drive motors are fixedly mounted on the top surface of the heat dissipation fins. The output shafts of the nozzle lifting column drive motors are driven and connected to the nozzle lifting column transmission belts. The nozzle lifting column transmission belts pass through preset holes in the heat dissipation fins. A wire channel opposite to the outlet of the wire clamping area is provided inside the heat dissipation fins. A plurality of heat dissipation copper tubes are also embedded inside the heat dissipation fins, and a heat dissipation fan is configured outside to form a heat dissipation system. The heating device fixing platform is a fixing platform with a heat insulation function. A nozzle lifting column driving gear is fixed on the surface of the heating device fixing platform. The gear shaft of the nozzle lifting column driving gear is sleeved with the lower end of the nozzle lifting column transmission belt passing through the preset hole in the heat dissipation fin. Five independent heating devices are isolated and fixed on the bottom surface of the heating device fixing platform. An optical axis throat pipe is fastened to any one of the heating devices through a throat screw. A threaded throat pipe is connected between the heat dissipation fin and the remaining four heating devices through a threaded connection. The upper ends of the optical axis throat pipe and the threaded throat pipe correspond to the heat dissipation fins provided inside the heat dissipation fins. The wire channel is connected, and the lower ends of the optical axis throat and the threaded throat are respectively connected to the wire heating channel provided in the heating device. The heating device fixed platform and the remaining four heating devices are movably penetrated by a nozzle lifting column. The upper part of the nozzle lifting column is engaged with the nozzle lifting column driving gear. The lower part of the nozzle lifting column is provided with an internal flow channel with the upper end penetrating the side wall of the nozzle lifting column. The nozzle lifting column can be lowered to a predetermined position to allow the internal flow channel to be coaxially aligned with the wire heating channel to realize continuous extrusion of the melt, and can also be raised to a set height to allow the internal flow channel to be misaligned with the wire heating channel to realize mechanical shutoff and locking.

2. The five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with broken line distribution according to claim 1 is characterized in that: The upper fixed platform and the lower fixed platform also cooperate to clamp and fix a pressure spring, and the rotating column of the feed pulley is connected to one end of the pressure spring through a semicircular pressure-bearing saddle.

3. The five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with broken line distribution according to claim 1 is characterized in that: The output shaft of the nozzle lifting column driving motor is directly connected to the nozzle lifting column transmission belt.

4. The five-nozzle dynamic temperature-controlled same-layer fusion 3D printing nozzle with broken line distribution according to claim 1 is characterized in that: The output shaft of the nozzle lifting column driving motor is connected to the bridge transmission shaft rigidly fixed on the top surface of the heat dissipation fin through a transition transmission belt, and the upper end of the nozzle lifting column transmission belt is sleeved on the bridge transmission shaft.

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