CN219276672U - Double-nozzle 3D printer - Google Patents

Abstract

The utility model provides a double-nozzle 3D printer, which belongs to the technical field of additive manufacturing and comprises a feeding device, a crushing device, an extrusion device, a heating device and a transmission device, wherein the extrusion device comprises a double-screw extruder and a single-screw extruder, the double-screw extruder comprises a first charging barrel, a main screw, an auxiliary screw, a first driving mechanism and a main nozzle, the main screw and the auxiliary screw are provided with meshed connecting sections, the feeding device is connected with the first charging barrel, the heating device is connected with the first charging barrel, the single-screw extruder comprises a second charging barrel, a transmission screw, a second driving mechanism and an auxiliary nozzle, and the crushing device is connected with the second charging barrel and is used for adding waste materials into the second charging barrel; the heating device is connected with the second charging barrel and is used for heating the waste materials in the second charging barrel; the transmission device is used for driving the extrusion device to move. The double-nozzle 3D printer provided by the utility model has the advantages that the printing efficiency is improved, the waste materials are recycled, and the resource waste is avoided.

Description

Double-nozzle 3D printer

Technical Field

The utility model belongs to the technical field of additive manufacturing, and particularly relates to a double-nozzle 3D printer.

Background

The FDM3D printing technology uses filament-shaped materials, the filament-shaped materials are extruded through a spray head, the filament-shaped materials are required to be manufactured by granular raw materials through the procedures of heating, melting, extruding, cooling and the like, the processing procedures are increased in the filament manufacturing process, the production efficiency is reduced, and the single spray head is single in applicable material and low in printing efficiency, so that the industrial use requirements in the current stage cannot be met. Meanwhile, waste materials such as supporting substrates and the like can be generated in the printing process of the 3D printer, so that resource waste is caused.

Disclosure of Invention

The utility model aims to provide a double-nozzle 3D printer, which solves the technical problems of low printing efficiency and resource waste of the 3D printer in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a double-nozzle 3D printer, including feedway, reducing mechanism, extrusion device, heating device and transmission, extrusion device includes twin-screw extruder and single screw extruder, twin-screw extruder includes first feed cylinder, main screw rod, vice screw rod, first actuating mechanism and main nozzle, main screw rod with vice screw rod all rotate connect in first feed cylinder, main screw rod with vice screw rod has the meshing linkage segment, first actuating mechanism with main screw rod with vice screw rod is connected for the drive main screw rod with vice screw rod rotates, the main nozzle is installed the lower extreme of first feed cylinder; the feeding device is connected with the first charging barrel and is used for feeding granules into the first charging barrel; the heating device is connected with the first charging barrel and is used for heating the granules in the first charging barrel; the single-screw extruder comprises a second charging barrel, a transmission screw, a second driving mechanism and a secondary nozzle, wherein the transmission screw is rotationally connected in the second charging barrel, the second driving mechanism is connected with the transmission screw and is used for driving the transmission screw to rotate, and the secondary nozzle is arranged at the lower end of the second charging barrel; the crushing device is connected with the second charging barrel and is used for adding waste materials into the second charging barrel; the heating device is connected with the second charging barrel and is used for heating the waste materials in the second charging barrel; the transmission device is used for driving the extrusion device to move.

In a possible implementation manner, the dual nozzle 3D printer further comprises a frame, and the feeding device, the crushing device, the extrusion device, the heating device and the transmission device are all mounted on the frame; the frame is internally provided with a supporting plate, the feeding device and the crushing device are positioned above the supporting plate, the first charging barrel and the second charging barrel are arranged below the supporting plate, the upper ends of the main screw rod, the auxiliary screw rod and the transmission screw rod are all rotationally connected to the supporting plate, and the first driving mechanism comprises a first motor arranged on the supporting plate; the second driving mechanism comprises a second motor arranged on the supporting plate, and the second motor is in transmission connection with the transmission screw.

In one possible implementation manner, the first driving mechanism further includes a main gear and a pinion, the main gear is mounted on the main screw, the pinion is mounted on the auxiliary screw, the main gear is in meshed connection with the pinion, and the first motor is in driving connection with the main screw.

In one possible implementation, the feeding device includes a plurality of storage bins, and the pulverizing device includes a pulverizing cylinder and a pulverizer installed in the pulverizing cylinder, and a plurality of the storage bins and the pulverizing cylinder are fixedly installed at an upper end of the frame.

In one possible implementation manner, a mixing bin and a stirrer arranged on the mixing bin are arranged between the feeding device and the first charging barrel, and the feeding device is connected with the mixing bin and the first charging barrel through a conveying pipe.

In one possible implementation manner, a secondary crushing bin is arranged between the crushing device and the second charging barrel, and the crushing device is connected with the secondary crushing bin and the secondary crushing bin is connected with the second charging barrel through a conveying pipe.

In one possible implementation, the number of the heating devices is two, and the heating devices comprise a heating block surrounding the first charging barrel and the second charging barrel and a plurality of heating rods installed in the heating blocks; the heating rods are uniformly arranged from top to bottom.

In one possible implementation, the dual nozzle 3D printer further includes a printing platform located below the twin screw extruder and the single screw extruder, the twin screw extruder and the single screw extruder having a first degree of freedom and a second degree of freedom that move in a horizontal direction, and the first degree of freedom being perpendicular to a direction of motion of the second degree of freedom, the printing platform having a third degree of freedom that moves in a vertical direction; the transmission device comprises a plurality of driving motors and a plurality of lead screws and is used for driving the double-screw extruder, the single-screw extruder and the printing platform to move.

In one possible implementation, the twin-screw extruder and the single-screw extruder are arranged in parallel side-by-side relationship.

The double-nozzle 3D printer provided by the utility model has the beneficial effects that: compared with the prior art, when the double-nozzle 3D printer works, the granules are added into the feeding device, the generated waste materials such as the substrate and the like are added into the crushing device, the granules enter the first charging barrel of the double-screw extruder through the feeding device, the heating device melts the granules in the first charging barrel, the main screw and the auxiliary screw are controlled to rotate together under the action of the first driving mechanism to extrude the melted granules from the main nozzle, the main screw and the auxiliary screw are meshed and synchronously rotated to enlarge the rolling area of the granules, and the extrusion efficiency of the granules is also improved; the waste is crushed by the crushing device and then enters a second charging barrel of the single screw extruder, the heating device melts the waste in the second charging barrel, and the transmission screw is controlled to rotate together under the action of a second driving mechanism so as to extrude the melted waste from the auxiliary nozzle; and then the additive manufacturing operation is completed under the action of the transmission device; through the mode, the printing efficiency of the 3D printer is improved by means of the double-screw extruder, the single-screw extruder, the main nozzle and the auxiliary nozzle, and meanwhile, the waste crushed by the crushing device is extruded by entering the single-screw extruder, so that the waste is recycled, and the resource waste is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a dual-nozzle 3D printer according to an embodiment of the present utility model;

FIG. 2 is a top view of a dual nozzle 3D printer according to an embodiment of the present utility model;

FIG. 3 is a partial cross-sectional view of a dual nozzle 3D printer provided by an embodiment of the present utility model;

fig. 4 is a schematic diagram of connection between an extrusion device and a mixing chamber according to an embodiment of the present utility model.

Wherein, each reference sign in the figure:

1. a feeding device; 11. a storage bin; 12. a mixing bin; 13. a stirrer; 14. a material conveying pipe; 15. a hill-drop wheel; 2. a pulverizing device; 21. a crushing barrel; 22. a pulverizer; 23. secondary crushing bin; 3. an extrusion device; 31. a twin screw extruder; 311. a first barrel; 312. a main screw; 313. a secondary screw; 314. a first driving mechanism; 315. a main nozzle; 316. a first motor; 32. a single screw extruder; 321. a second barrel; 322. a transmission screw; 323. a second driving mechanism; 324. a sub-nozzle; 325. a second motor; 4. a heating device; 41. a heating block; 42. a heating rod; 5. a transmission device; 51. a driving motor; 52. a screw rod; 6. a frame; 61. a support plate; 62. and (5) a printing platform.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 4, a dual nozzle 3D printer according to the present utility model will now be described. The double-nozzle 3D printer comprises a feeding device 1, a crushing device 2, an extrusion device 3, a heating device 4 and a transmission device 5, wherein the extrusion device 3 comprises a double-screw extruder 31 and a single-screw extruder 32, the double-screw extruder 31 comprises a first charging barrel 311, a main screw 312, an auxiliary screw 313, a first driving mechanism 314 and a main nozzle 315, the main screw 312 and the auxiliary screw 313 are both rotatably connected in the first charging barrel 311, the main screw 312 and the auxiliary screw 313 are provided with meshing connection sections, the first driving mechanism 314 is connected with the main screw 312 and the auxiliary screw 313 and is used for driving the main screw 312 and the auxiliary screw 313 to rotate, and the main nozzle 315 is arranged at the lower end of the first charging barrel 311; the feeding device 1 is connected with the first charging barrel 311 and is used for adding granules into the first charging barrel 311; the heating device 4 is connected with the first charging barrel 311 and is used for heating the granules in the first charging barrel 311; the single screw extruder 32 comprises a second charging barrel 321, a transmission screw 322, a second driving mechanism 323 and a secondary nozzle 324, wherein the transmission screw 322 is rotationally connected in the second charging barrel 321, the second driving mechanism 323 is connected with the transmission screw 322 and is used for driving the transmission screw 322 to rotate, and the secondary nozzle 324 is arranged at the lower end of the second charging barrel 321; the crushing device 2 is connected with the second charging barrel 321 and is used for adding waste materials into the second charging barrel 321; the heating device 4 is connected with the second charging barrel 321 and is used for heating the waste materials in the second charging barrel 321; the transmission device 5 is used for driving the extrusion device 3 to move.

Compared with the prior art, when the double-nozzle 3D printer provided by the utility model works, the granules are added into the feeding device 1, the generated waste materials such as substrates are added into the crushing device 2, the granules enter the first cylinder 311 of the double-screw extruder 31 through the feeding device 1, the heating device 4 melts the granules in the first cylinder 311, the main screw 312 and the auxiliary screw 313 are controlled to rotate together under the action of the first driving mechanism 314 to extrude the melted granules from the main nozzle 315, and the rolling area of the granules is increased by meshing and synchronous rotation of the main screw 312 and the auxiliary screw 313, so that the extrusion efficiency of the granules is also improved; the waste materials are crushed by the crushing device 2 and then enter a second charging barrel 321 of the single-screw extruder 32, the heating device 4 melts the waste materials in the second charging barrel 321, and the transmission screw 322 is controlled to rotate together under the action of a second driving mechanism 323 so as to extrude the melted waste materials from the auxiliary nozzle 324; and then the additive manufacturing operation is completed under the action of the transmission device 5; in this way, the printing efficiency of the 3D printer is improved by the operation of the twin-screw extruder 31, the single-screw extruder 32, the main nozzle 315 and the sub-nozzle 324 together, and the waste crushed by the crushing device 2 is extruded by entering the single-screw extruder 32, so that the waste is recycled, and the waste of resources is avoided.

The twin-screw extruder 31 has good transmission effect, good fluidity, low energy efficiency, and effectively avoids abrasion between the main screw 312, the auxiliary screw 313 and the first cylinder 311. The flow rate of the material and the final forming accuracy can be controlled by adjusting the diameters of the main nozzle, the sub nozzle, and the rotational speed of the main screw 312. Preferably, the twin screw extruder 31 and the single screw extruder 32 are arranged in parallel side by side.

At the outlet of the feeding device 1 a hill-drop wheel 15 is mounted, whereby granules are fed by means of the hill-drop wheel 15 into the first barrel 311 of the twin-screw extruder 31. The transmission device 5 is connected to the twin-screw extruder 31 and the single-screw extruder 32, and drives the twin-screw extruder 31 and the single-screw extruder 32 to move to perform 3D printing operation.

Referring to fig. 1 and fig. 2, as a specific embodiment of the dual-nozzle 3D printer provided by the present utility model, the dual-nozzle 3D printer further includes a frame 6, and the feeding device 1, the crushing device 2, the extrusion device 3, the heating device 4 and the transmission device 5 are all mounted on the frame 6; the frame 6 is internally provided with a supporting plate 61, the feeding device 1 and the crushing device 2 are positioned above the supporting plate 61, a first charging barrel 311 and a second charging barrel 321 are arranged below the supporting plate 61, the upper ends of a main screw 312, a secondary screw 313 and a transmission screw 322 are all rotatably connected to the supporting plate 61, and a first driving mechanism 314 comprises a first motor 316 arranged on the supporting plate 61; the second driving mechanism 323 comprises a second motor 325 mounted on the supporting plate 61, and the second motor 325 is in transmission connection with the transmission screw 322; the frame 6 is as whole two nozzle 3D printer body frames, and frame 6 is box structure, and feedway 1, reducing mechanism 2 are installed in the upper end of frame 6, and are located extrusion device 3's top, are convenient for carry out the feed operation. An optical axis is installed in the frame 6, a supporting plate 61 is slidably connected to the optical axis, and a transmission device 5 is connected to the supporting plate 61 for driving the supporting plate 61 to slide on the optical axis to drive the twin-screw extruder 31 and the single-screw extruder 32 to move. The first driving mechanism 314 comprises a first motor 316, the second driving mechanism 323 comprises a second motor 325, and the first motor 316 and the second motor 325 are both stepping motors, so as to drive the twin-screw extruder 31 and the single-screw extruder 32 to move accurately and stably. The first motor 316 and the second motor 325 are fixedly mounted on the frame 6.

Referring to fig. 1 and 3, as a specific embodiment of the dual nozzle 3D printer provided by the present utility model, the first driving mechanism 314 further includes a main gear and a sub gear, the main gear is mounted on the main screw 312, the sub gear is mounted on the sub screw 313, the main gear is engaged with the sub gear, the first motor 316 is in driving connection with the main screw 312, the first motor 316 is connected with the main screw 312 through a coupling, the main gear is mounted on the main screw 312, and the sub gear engaged with the main gear is mounted on the sub screw 313, so as to realize synchronous rotation of the main screw 312 and the sub screw 313.

Referring to fig. 1 and 2, as a specific embodiment of the dual nozzle 3D printer provided by the present utility model, a feeding device 1 includes a plurality of storage bins 11, a crushing device 2 includes a crushing barrel 21 and a crusher 22 installed in the crushing barrel 21, the plurality of storage bins 11 and the crushing barrel 21 are fixedly installed at the upper end of a frame 6, the plurality of storage bins 11 are arranged to form the feeding device 1, so that the plurality of storage bins 11 simultaneously feed granules into a twin screw extruder 31, and the working efficiency is high; and the plurality of storage bins 11 also have a standby function to prevent the individual storage bins 11 from being blocked to affect the normal operation of the 3D printer. The waste is fed into a crushing cylinder 21, and crushed using a crusher 22. The plurality of storage bins 11 and the crushing cylinder 21 are fixed at the upper end of the frame 6 and are fully arranged to prevent impurities or larger particles and the like above from directly entering the first cylinder 311 and the second cylinder 321. The hill-drop wheel 15 is arranged at the lower end outlets of the storage bin 11 and the crushing charging barrel 21.

Referring to fig. 1 to 3, as a specific embodiment of the dual nozzle 3D printer provided by the present utility model, a mixing bin 12 and a stirrer 13 mounted on the mixing bin 12 are disposed between the feeding device 1 and the first cylinder 311, the feeding device 1 and the mixing bin 12, and the mixing bin 12 and the first cylinder 311 are all connected by a conveying pipe 14, the mixing bin 12 is disposed between the feeding device 1 and the first cylinder 311, so that the granules are fully mixed after being stirred by the stirrer 13 in the mixing bin 12, and the feeding device 1, the mixing bin 12 and the first cylinder 311 are respectively connected by the conveying pipe 14.

Referring to fig. 1 to 3, as a specific embodiment of the dual-nozzle 3D printer provided by the present utility model, a secondary pulverizing bin 23 is disposed between the pulverizing device 2 and the second barrel 321, and the pulverizing device 2 and the secondary pulverizing bin 23, and the secondary pulverizing bin 23 and the second barrel 321 are connected by a conveying pipe 14; the secondary crushing bin 23 is arranged between the crushing device 2 and the second charging barrel 321, waste and defective products are crushed for the first time by the crusher 22, and are conveyed into the secondary crushing bin 23 through the conveying pipe 14 for secondary crushing, so that materials are more uniform and easy to extrude, recycling of the materials is realized, and the cost is saved.

Referring to fig. 1 and 3, as a specific embodiment of the dual nozzle 3D printer provided by the present utility model, there are two heating devices 4, and the heating device 4 includes a heating block 41 surrounding the first barrel 311 and the second barrel 321 and a plurality of heating rods 42 installed in the heating block 41; the plurality of heating rods 42 are uniformly arranged from top to bottom, and two heating devices 4 are respectively installed on the first cylinder 311 and the second cylinder 321 to respectively and independently heat the materials in the first cylinder 311 and the second cylinder 321. The heating block 41 is provided with a mounting hole matched with the first charging barrel 311 or the second charging barrel 321, and the heating block 41 is provided with a plurality of heating rods 42, so that the first charging barrel 311 and the second charging barrel 321 are uniformly and completely heated. The heating rods 42 are symmetrically installed at both sides of the first cylinder 311 or the second cylinder 321.

Referring to fig. 1, as a specific embodiment of the dual-nozzle 3D printer provided by the present utility model, the dual-nozzle 3D printer further includes a printing platform 62 located below the dual-screw extruder 31 and the single-screw extruder 32, wherein the dual-screw extruder 31 and the single-screw extruder 32 have a first degree of freedom and a second degree of freedom that move along a horizontal direction, the first degree of freedom is perpendicular to a movement direction of the second degree of freedom, and the printing platform 62 has a third degree of freedom that moves along a vertical direction; the transmission device 5 comprises a plurality of driving motors 51 and a plurality of lead screws 52, and is used for driving the double-screw extruder 31, the single-screw extruder 32 and the printing platform 62 to move, namely, the double-screw extruder 31 and the single-screw extruder 32 move along the X axis and the Y axis, and the printing platform 62 moves along the Z axis, so that the purpose of 3D printing is realized. The driving motor 51 and the screw 52 are used for driving the double-screw extruder 31, the single-screw extruder 32 and the printing platform 62 to linearly move, so that the stability and the movement precision are high.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (9)

1. The double-nozzle 3D printer comprises a feeding device, a crushing device, an extruding device, a heating device and a transmission device, and is characterized in that the extruding device comprises a double-screw extruder and a single-screw extruder, the double-screw extruder comprises a first charging barrel, a main screw, an auxiliary screw, a first driving mechanism and a main nozzle, the main screw and the auxiliary screw are both rotationally connected in the first charging barrel, the main screw and the auxiliary screw are provided with meshing connection sections, the first driving mechanism is connected with the main screw and the auxiliary screw and is used for driving the main screw and the auxiliary screw to rotate, and the main nozzle is installed at the lower end of the first charging barrel; the feeding device is connected with the first charging barrel and is used for feeding granules into the first charging barrel; the heating device is connected with the first charging barrel and is used for heating the granules in the first charging barrel; the single-screw extruder comprises a second charging barrel, a transmission screw, a second driving mechanism and a secondary nozzle, wherein the transmission screw is rotationally connected in the second charging barrel, the second driving mechanism is connected with the transmission screw and is used for driving the transmission screw to rotate, and the secondary nozzle is arranged at the lower end of the second charging barrel; the crushing device is connected with the second charging barrel and is used for adding waste materials into the second charging barrel; the heating device is connected with the second charging barrel and is used for heating the waste materials in the second charging barrel; the transmission device is used for driving the extrusion device to move.

2. The dual nozzle 3D printer of claim 1, further comprising a frame, wherein the feeding device, the pulverizing device, the extrusion device, the heating device, and the transmission device are all mounted on the frame; the frame is internally provided with a supporting plate, the feeding device and the crushing device are positioned above the supporting plate, the first charging barrel and the second charging barrel are arranged below the supporting plate, the upper ends of the main screw rod, the auxiliary screw rod and the transmission screw rod are all rotationally connected to the supporting plate, and the first driving mechanism comprises a first motor arranged on the supporting plate; the second driving mechanism comprises a second motor arranged on the supporting plate, and the second motor is in transmission connection with the transmission screw.

3. The dual nozzle 3D printer of claim 2, wherein the first drive mechanism further comprises a main gear and a secondary gear, the main gear is mounted on the main screw, the secondary gear is mounted on the secondary screw, the main gear is in meshed connection with the secondary gear, and the first motor is in driving connection with the main screw.

4. The dual nozzle 3D printer of claim 2, wherein the feeding device comprises a plurality of storage bins, the crushing device comprises a crushing barrel and a crusher mounted in the crushing barrel, and the plurality of storage bins and the crushing barrel are fixedly mounted at the upper end of the frame.

5. The dual nozzle 3D printer of claim 1, wherein a mixing bin and a stirrer arranged on the mixing bin are arranged between the feeding device and the first charging barrel, and the feeding device is connected with the mixing bin and the mixing bin is connected with the first charging barrel through a conveying pipe.

6. The dual nozzle 3D printer of claim 5, wherein a secondary pulverizing bin is disposed between the pulverizing device and the second barrel, and the pulverizing device is connected to the secondary pulverizing bin and the secondary pulverizing bin is connected to the second barrel through a feed pipe.

7. The dual nozzle 3D printer of claim 1, wherein the number of heating devices is two, the heating devices comprising a heating block surrounding the first cartridge and the second cartridge and a plurality of heating rods mounted within the heating block; the heating rods are uniformly arranged from top to bottom.

8. The dual nozzle 3D printer of claim 1, further comprising a print platform positioned below the dual screw extruder and the single screw extruder, the dual screw extruder and the single screw extruder having a first degree of freedom and a second degree of freedom that move in a horizontal direction, the first degree of freedom being perpendicular to a direction of motion of the second degree of freedom, the print platform having a third degree of freedom that moves in a vertical direction; the transmission device comprises a plurality of driving motors and a plurality of lead screws and is used for driving the double-screw extruder, the single-screw extruder and the printing platform to move.

9. The dual nozzle 3D printer of claim 1, wherein the twin screw extruder and the single screw extruder are arranged in parallel side-by-side relationship.

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