CN212888946U

CN212888946U - Many shower nozzles 3D printing device

Info

Publication number: CN212888946U
Application number: CN202021638560.7U
Authority: CN
Inventors: 宋菊青; 丁鹏; 招健斌
Original assignee: Dongguan University of Technology
Current assignee: Dongguan University of Technology
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-04-06
Anticipated expiration: 2030-08-07

Abstract

The utility model relates to the technical field of 3D printing, in particular to a multi-nozzle 3D printing device, which comprises a printing chamber, a refrigerating chamber, a printing assembly arranged in the printing chamber and a refrigerating assembly arranged in the refrigerating chamber, wherein the refrigerating chamber is positioned above the printing chamber; the printing assembly comprises an X-axis movement assembly, a Y-axis movement assembly, a Z-axis movement assembly, a working platform and a plurality of groups of spray head assemblies, wherein the Y-axis movement assemblies are two groups of Y-axis movement assemblies and two groups of Y-axis movement assemblies which are respectively connected to two ends of the X-axis movement assembly, and the spray head assemblies are connected with the X-axis movement assembly; the Z-axis motion assembly is arranged in the printing chamber, and the working platform is connected with the Z-axis motion assembly; the print is loaded on the work platform and the nozzle assembly is positioned above the work platform. The multi-group spray head component extrudes silk materials with different colors, has stronger adaptability and can improve the experience of users; the refrigeration assembly is arranged to reduce the temperature in the printing chamber and improve the forming efficiency; the surface temperature of the printed matter is reduced, and the surface quality of the printed matter is improved.

Description

Many shower nozzles 3D printing device

Technical Field

The utility model relates to a technical field that 3D printed, more specifically relates to a many shower nozzles 3D printing device.

Background

3D printing technology, as a new manufacturing approach, was first introduced in the eighties of the last century. Different from the traditional material reduction manufacturing, the required parts and models are manufactured by printing layer by layer and stacking layer by layer on the basis of a digital model and taking metal powder, plastic and the like as raw materials. Classified according to technical principles, the Fused Deposition Modeling (FDM), the photocuring modeling (SLA), the selective laser sintering modeling (SLS), the selective laser melting modeling (SLM) and the like are common, wherein the FDM 3D printing technology has the advantages of being non-toxic and harmless, simple and easy to operate on an operating platform, low in cost and the like, and is widely popular with families and offices. Desktop level 3D printer on the market at present is based on Makebot model mostly, and the shower nozzle of adoption is mostly single shower nozzle or dual spray, and the color of printing is monotonous, can't satisfy people's demand.

Chinese patent CN108312523A discloses a multi-nozzle 3D printer, which provides a moving strategy in XYZ three directions by adopting a mode that a servo motor is connected with a toothed belt; the design that a plurality of nozzles are fixed on the nozzle fixing plate belt is adopted, and the nozzles are automatically switched in the whole printing process, so that the production efficiency is improved. Although the scheme adopts the design of a plurality of spray heads, the requirement of users on colors can be met. However, in the above printer, because there is no cooling device, the heat generated in the printing process cannot be dissipated in time, which results in the phenomena of low forming efficiency of the printer, collapse of the printing layer and poor surface quality of the printed surface.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the prior art, provide a many shower nozzles 3D printing device, not only can satisfy user's multicolored demand, still in time to printed matter surface cooling, improve the surface quality of printed matter, improve shaping efficiency.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the multi-nozzle 3D printing device comprises a printing chamber, a refrigerating chamber, a printing assembly and a refrigerating assembly, wherein the printing assembly is arranged in the printing chamber, the refrigerating assembly is arranged in the refrigerating chamber, and the refrigerating chamber is positioned above the printing chamber; the printing assembly comprises an X-axis moving assembly, Y-axis moving assemblies, a Z-axis moving assembly, a working platform and a plurality of groups of spray head assemblies, wherein the Y-axis moving assemblies are two groups of Y-axis moving assemblies and two groups of Y-axis moving assemblies which are respectively connected to two ends of the X-axis moving assembly, and the spray head assemblies are connected with the X-axis moving assemblies; the Z-axis motion assembly is arranged in the printing chamber, and the working platform is connected with the Z-axis motion assembly; the printing piece is loaded on the working platform, and the spray head assembly is positioned above the working platform.

The multi-nozzle 3D printing device loads a printing piece on the working platform during printing, the working platform adjusts the Z-direction displacement of the workpiece under the action of the Z-axis movement assembly, and the X-axis movement assembly and the Y-axis movement assembly jointly control the X-direction displacement and the Y-direction displacement of the nozzle assembly, so that the requirement of 3D printing can be met; the printing chamber is cooled down in time through the refrigeration assembly, the forming efficiency is improved, and the surface of a printed piece can also be cooled down in time through the refrigeration assembly, and the surface quality of the printed piece is improved.

Further, the device also comprises a shell and a cover body, wherein the cover body is hinged with the shell; the printing chamber is positioned in the shell, the refrigerating chamber is positioned in the cover body, and the refrigerating chamber and the printing chamber are two mutually independent spaces. Furthermore, the X-axis movement assembly comprises a first synchronous belt, a first motor and two groups of first synchronous wheels, the first motor is connected with one group of the first synchronous wheels, the first synchronous belt surrounds the peripheries of the two groups of the first synchronous wheels, and the spray head assembly is connected with the first synchronous belt.

Furthermore, an X-axis guide rod is arranged on the side of the first synchronous belt in parallel, and the spray head assembly is connected with the X-axis guide rod in a sliding manner; the two ends of the X-axis guide rod and the first synchronizing wheel are both mounted on a first mounting seat, and the first mounting seat is connected with the Y-axis moving assembly.

Furthermore, the Y-axis motion assembly comprises a second synchronous belt, a second motor and a plurality of groups of second synchronous wheels, the second motor is connected with one group of the second synchronous wheels, other second synchronous wheels are mounted on the supporting shaft, the second synchronous belt surrounds the peripheries of the two groups of the second synchronous wheels, and the first mounting seat is connected with the second synchronous belt; the support shafts are divided into two groups, and the two groups of support shafts are fixed on the inner wall of the shell in parallel.

Further, the Z-axis movement assembly comprises a third motor, a screw rod, a supporting seat and a working platform, the third motor is installed in the printing chamber, the screw rod is connected with the third motor, the working platform is installed on the supporting seat, and the working platform and the supporting seat are both movably connected with the screw rod.

Furthermore, a Z-axis guide rod is arranged on the side of the screw rod in parallel and is fixed in the printing chamber; the supporting seat and the working platform are both connected with the Z-axis guide rod in a sliding mode.

Furthermore, a plurality of groups of spray head assemblies are all installed on the base, heat dissipation assemblies are arranged beside the spray head assemblies and installed on fixed blocks, and the fixed blocks are installed on the base.

Further, the spray head assembly comprises a feeding guide port, a fourth motor, a feeding roller, a feeding guide pipe and a nozzle, the feeding roller is communicated between the feeding guide port and the feeding guide pipe, the feeding roller is connected to the output end of the fourth motor, the nozzle is connected to the tail end of the feeding guide pipe, and a heating assembly is arranged beside the nozzle.

Furthermore, the refrigeration assembly comprises cold guide plates, refrigeration plates, radiating fins and a radiating fan, wherein a plurality of groups of cold guide plates are arranged on the refrigeration plates, the refrigeration plates are arranged on one side of the radiating fins, heat insulation gaskets are arranged on the outer sides of the refrigeration plates, and the radiating fan is arranged on the other side of the radiating fins; the refrigeration assembly is arranged on the side part of the cover body, and an axial flow fan for guiding cold air to the printing chamber is arranged at the bottom of the cover body.

Compared with the prior art, the beneficial effects of the utility model are that:

the multi-nozzle 3D printing device has the advantages that the multi-group nozzle assemblies are used for extruding silk materials with different colors, so that the adaptability is stronger, and the user experience can be improved; the refrigeration component is arranged to refrigerate and cool the printing chamber so as to improve the forming efficiency, and the surface of the printed piece is cooled in time so as to improve the surface quality of the printed piece.

Drawings

Fig. 1 is a schematic structural diagram I of a multi-nozzle 3D printing device;

fig. 2 is a schematic structural diagram II of the multi-nozzle 3D printing apparatus;

FIG. 3 is a schematic structural view I of a showerhead assembly;

FIG. 4 is a schematic structural view II of the showerhead assembly;

FIG. 5 is a schematic view of a nozzle of the showerhead assembly;

FIG. 6 is a schematic view I of the structure of the printing assembly;

FIG. 7 is a schematic view of the structure of the printing assembly II;

FIG. 8 is a schematic view III of the structure of the printing assembly;

FIG. 9 is a schematic structural diagram I of the cover;

FIG. 10 is a schematic view of the structure of the cover II;

in the drawings: 1-a printing chamber; 11-a housing; 12-a cover body; 13-a handle; 2-a refrigeration component; 21-a cold conducting sheet; 22-a refrigerating sheet; 23-a first heat sink; 24-a first heat dissipation fan; 25-a heat insulating spacer; 26-axial fan; 27-a thermally insulating barrier; a 3-X axis motion assembly; 31-a first synchronization belt; 33-a first synchronizing wheel; 34-X axis guide bar; 35-a first mount; a 4-Y axis motion assembly; 41-a second synchronous belt; 42-a second motor; 43-a second synchronizing wheel; 44-support shaft; a 45-Y axis guide; 46-a third synchronous belt; a 5-Z axis motion assembly; 51-a third motor; 52-a screw rod; 53-a support base; 54-Z axis guides; 55-leveling nut; 56-leveling spring; 57-baffle; 6-a working platform; 7-a spray head assembly; 71-a base; 72-a fixed plate; 73-a feed guide; 74-a fourth motor; 75-a feed roller; 76-a nozzle; 77-heating tube; 78-heating block; 79-a feed conduit; 8-a heat dissipation assembly; 81-a second heat sink; 82-a second heat dissipation fan; 83-fixed block; 9-roll of material; and 10-refrigerating chamber.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Examples

Fig. 1 to 10 show an embodiment of a multi-nozzle 3D printing apparatus according to the present invention, which includes a printing chamber 1, a refrigerating chamber 10, a printing assembly disposed in the printing chamber 1, and a refrigerating assembly 2 disposed in the refrigerating chamber 10, wherein the refrigerating chamber is located above the printing chamber 1; the printing assembly comprises an X-axis moving assembly 3, Y-axis moving assemblies 4, a Z-axis moving assembly 5, a working platform 6 and a plurality of groups of spray head assemblies 7, wherein the Y-axis moving assemblies 4 are two groups, the two groups of Y-axis moving assemblies 4 are respectively connected to two ends of the X-axis moving assembly 3, and the spray head assemblies 7 are connected with the X-axis moving assembly 3; the Z-axis motion assembly 5 is arranged in the printing chamber 1, and the working platform 6 is connected with the Z-axis motion assembly 5; the print is loaded on the work table 6 and the head assembly 7 is positioned above the work table 6.

In the embodiment, during printing, a printed piece is loaded on the working platform 6, the working platform 6 adjusts the Z-direction displacement of the workpiece under the action of the Z-axis movement component 5, and the X-axis movement component 3 and the Y-axis movement component 4 jointly control the X-direction displacement and the Y-direction displacement of the nozzle component 7, so that the requirement of 3D printing can be met; high heat that 3D printing process produced in time through the cooling of refrigeration subassembly 2, improve the shaping efficiency, print a surface and also can in time cool off through refrigeration subassembly 2 to improve the surface quality of printing.

In one embodiment, the printing device includes a housing 11 and a cover 12, the cover 12 is hinged to the housing 11; the printing chamber 1 is located in the housing 11, the cooling chamber 10 is located in the cover 12, and the cooling chamber 10 and the printing chamber 1 are independent of each other, as shown in fig. 1 to 2. The cover body 12 is hinged with the shell body 11 to form a flip design, so that the printing component and the refrigerating component 2 can be matched with each other in the printing process, and convenience can be provided for taking out a printed part and maintaining a machine after printing is finished. The side wall of the housing 11 of this embodiment may be provided with one or more transparent windows for real-time observation of the printing operation in the printing chamber 1. In order to facilitate the opening or closing of the cover 12, the present embodiment is provided with a handle 13 at the top of the cover 12.

In one embodiment, the X-axis moving assembly 3 includes a first synchronous belt 31, a first motor and two sets of first synchronous wheels 33, the first motor is connected with one set of first synchronous wheels 33, the first synchronous belt 31 surrounds the peripheries of the two sets of first synchronous wheels 33, and the spray head assembly 7 is connected with the first synchronous belt 31, as shown in fig. 6 to 8. In practice, the first motor drives the set of first synchronization wheels 33 to rotate, so as to drive the first synchronization belt 31 to move between the two sets of first synchronization wheels 33, and drive the nozzle assembly 7 to move in the X direction. It should be noted that the X-axis moving assembly 3 of this embodiment is not limited to the transmission form using the synchronous belt, and other transmission assemblies such as the linear module, the screw rod 52 slider, the gear rack and the like, which can drive the nozzle assembly 7 to move linearly in the X direction, are all applicable to the present invention.

In one embodiment, the side of the first synchronous belt 31 is provided with an X-axis guide bar 34 in parallel, and the spray head assembly 7 is connected with the X-axis guide bar 34 in a sliding way; both ends of X axle guide bar 34, first synchronizing wheel 33 all install in first mount pad 35, and first mount pad 35 is connected with Y axle motion subassembly 4. The provision of the X-axis guide 34 is preferred for improving the smoothness of the movement of the spray head assembly 7 and is not intended as a limiting provision of the present invention. In addition, the X-axis guide rods 34 in this embodiment can be arranged in two groups symmetrically on two sides of the first synchronous belt 31 to improve the smoothness of the movement of the spray head assembly 7. When the X-axis guide bar 34 is provided and the head assembly 7 is connected, a space needs to be reserved for the nozzle 76 of the head assembly 7; in addition, the first mounting seat 35 is arranged to assemble the X-axis guide rod 34 and the X-axis movement assembly into a whole, so that a compact structure can be obtained, and the X-axis movement assembly and the Y-axis movement assembly can be conveniently connected and mounted.

In one embodiment, the Y-axis moving assembly 4 includes a second timing belt 41, a second motor 42 and a plurality of sets of second timing wheels 43, the second motor 42 is connected to one set of the second timing wheels 43, the other second timing wheels 43 are respectively mounted on two sets of support shafts 44, the second timing belt 41 surrounds the outer peripheries of the two sets of the second timing wheels 43, and the first mounting seat 35 is connected to the second timing belt 41; two sets of support shafts 44 are fixed in parallel to the inner wall of the housing 11 as shown in fig. 6 to 8. In this embodiment, the number of the second synchronizing wheels 43 may be set to six, one of the six sets is connected to the second motor 42, the other five sets are mounted on the supporting shafts 44, one set of the supporting shafts 44 is mounted with two sets of the second synchronizing wheels 43, the other set of the supporting shafts 44 is mounted with three sets of the second synchronizing wheels 43, the second timing belts 41 are respectively wound around the outer peripheries of the two sets of the second synchronizing wheels 43 which are oppositely arranged, the other set of the second synchronizing wheels 43 is mounted at the end of one set of the supporting shafts 44, and the third timing belt 46 is wound around the outer periphery of the second synchronizing wheels 43 which are connected to the second motor 42. In implementation, the second motor 42 operates to drive the second synchronous wheel 43 connected thereto to rotate, so as to drive the third synchronous belt 46 to move and further drive the support shaft 44 to rotate, the support shaft 44 rotates to drive the second synchronous wheel 43 connected thereto to move, and the second synchronous belt 41 rotates around the second synchronous wheel 43 to drive the first mounting seat 35 to move linearly; two sets of first mount pads 35 are installed in two sets of parallel arrangement's Y axle motion subassembly 4, and two sets of second hold-in range 41 synchronous motion can give X axle motion subassembly 3 and shower nozzle subassembly 7 with better stationarity. It should be noted that the Y-axis moving assembly 4 of this embodiment is not limited to the transmission form using the synchronous belt, and other transmission assemblies such as the linear module, the screw rod 52 slider, the gear rack and the like, which can drive the nozzle assembly 7 to move linearly in the Y direction, are all applicable to the present invention. In this embodiment, two sets of support shafts 44 and two sets of synchronous belts surround a square frame structure, which is compact in structure and beautiful in appearance.

In one embodiment, a Y-axis guide rod 45 is disposed in parallel on the side of the second timing belt, the first mounting seat 35 is slidably connected to the Y-axis guide rod 45, and two ends of the Y-axis guide rod 45 are fixedly mounted on the inner wall of the housing 11. In this embodiment, the Y-axis guide rods 45 may be arranged in two sets and symmetrically arranged at two sides of the second timing belt 41 to improve the movement stability of the nozzle assembly 7. As described above, the Y-axis guide rod 45 guides the movement direction of the first mounting seat 35, but it should be noted that the provision of the Y-axis guide rod 45 is a limitation for obtaining better stability, and is not a restrictive provision of the present invention.

In one embodiment, the Z-axis moving assembly 5 includes a third motor 51, a lead screw 52, a supporting seat 53 and a working platform 6, the third motor 51 is installed below the printing chamber 1, a base is installed below the printing chamber 1 for installing the third motor 51 and other devices, the lead screw 52 is connected with the third motor 51, the working platform 6 is installed on the supporting seat 53, and both the working platform 6 and the supporting seat 53 are movably connected with the lead screw 52, as shown in fig. 8. When the embodiment is implemented, the third motor 51 works to drive the screw rod 52 to rotate, the supporting seat 53 and the working platform 6 are in threaded connection with the screw rod 52, and the rotation of the screw rod 52 is converted into the lifting motion of the supporting seat 53 and the working platform 6, so that the height of a printed part is adjusted. In addition, the third motor 51 of the present embodiment can be connected to the bottom of the screw 52 and installed at the bottom of the housing 11, so as to avoid the adverse effect of the weight of the third motor 51 on the movement of the screw 52.

In one embodiment, a Z-axis guide 54 is arranged on the side of the lead screw 52 in parallel, and the Z-axis guide 54 is fixed in the printing chamber 1; the supporting seat 53 and the working platform 6 are both connected with the Z-axis guide rod 54 in a sliding manner. In this embodiment, the Z-axis guide rods 54 may be arranged in two groups, the bottom of the Z-axis guide rods 54 is fixed at the bottom of the housing 11, and the two groups of Z-axis guide rods 54 are symmetrically arranged at two sides of the screw rod 52 to improve the motion stability of the working platform 6. However, it should be noted that the Z-axis guide 54 is preferably provided to improve the smoothness of the movement of the working platform 6, and is not intended to be a limiting provision of the present invention.

In one embodiment, the working platform 6 is not directly fixed on the supporting base 53, but a plurality of groups of leveling nuts 55 which are uniformly distributed are connected between the working platform 6 and the supporting base 53, the leveling nuts 55 are sleeved with leveling springs 56, and the leveling springs 56 are positioned between the working platform 6 and the supporting base 53. When the working platform 6 is a rectangular structure, the leveling nuts 55 can be arranged in four groups, and the four groups of leveling nuts 55 are respectively located at four corners of the working platform 6. Therefore, the working platform 6 can be effectively ensured to be positioned on the horizontal plane during printing, so that the printing accuracy and accuracy are ensured. In addition, the present embodiment can also be provided with a baffle 57 at the side of the working platform 6 to prevent the waste material from entering the Z-axis transmission assembly during the operation process to cause unnecessary locking.

In one embodiment, a plurality of sets of showerhead modules 7 are mounted on the base 71, heat dissipation modules 8 are disposed beside the showerhead modules 7, and the heat dissipation modules 8 are mounted on the base 71. The upper parts of the plurality of groups of spray head assemblies 7 are connected with the fixing plate 72, and the fixing plate 72, the base 71 and the plurality of groups of spray head assemblies 7 form a rectangular box-shaped structure, so that the structure is compact, and the working stability can be effectively ensured. The different nozzle assemblies 7 can be used for extruding silk materials with different colors and endowing the printed parts with different colors; the number of showerhead modules 7 can be adapted according to the use requirements. When printing, shower nozzle subassembly 7 often keeps the uniform temperature, for preventing the influence of high temperature to each parts life, sets up radiator unit 8 and in time dispels the heat that shower nozzle subassembly 7 produced. In this embodiment, the heat dissipation assembly 8 includes a second heat dissipation fin 81 and a second heat dissipation fan 82, the second heat dissipation fins 81 are uniformly arranged, the second heat dissipation fin 81 is disposed between the second heat dissipation fan 82 and the nozzle assembly 7, the number of the second heat dissipation fans 82 is equal to the number of the nozzle assembly 7, and the mounting positions of the second heat dissipation fans 82 correspond to the mounting positions of the nozzle assembly 7 one to one.

In one embodiment, the spray head assembly 7 includes a feeding guide opening 73, a fourth motor 74, a feeding roller 75, a feeding conduit 79 and a nozzle 76, the feeding roller 75 is communicated between the feeding guide opening 73 and the feeding conduit 79, the feeding roller 75 is connected to the output end of the fourth motor 74, the nozzle 76 is connected to the tail end of the feeding conduit, and the nozzle 76 is provided with a heating assembly beside, as shown in fig. 3 and 4. The heating assembly of this embodiment includes heating pipe 77 and heating block 78, and heating pipe 77 inlays in heating block 78, and heating block 78 locates the nozzle 76 side, provides the heat for the silk material of nozzle 76 department, prevents that the silk material from solidifying and leading to the jam. In this embodiment, the heating pipe 77 is operated, the fourth motor 74 is started, and the filament material is fed to the nozzle 76 through the feed roller 75, is kept in a molten state inside the nozzle 76, and is extruded from the nozzle 76. For better printing, the present embodiment uses a proximal feeding mode, and the section angle at the outlet of the nozzle 76 is 60 °, as shown in fig. 5.

In one embodiment, the raw material used for 3D printing is usually filament material, and for the convenience of material transportation, the material roll 9 is rotatably connected to the side wall of the housing 11 in this embodiment, and the raw material is wound on the material roll 9, and under the action of the feeding roller 75, the raw material can be smoothly transported to the nozzle assembly 7 and extruded, as shown in fig. 2.

In one embodiment, the refrigeration assembly 2 includes a plurality of groups of cold guiding sheets 21, a plurality of groups of refrigeration sheets 22, a plurality of groups of heat-insulating gaskets 25, and a plurality of groups of first cooling fans 24, wherein the refrigeration sheets 22 are mounted on one side of the first cooling fins 23, and the outer sides of the refrigeration sheets are provided with the heat-insulating gaskets 25; the cooling unit 2 is mounted on the side of the cover 12, and an axial fan 26 for guiding cool air to the printing chamber 1 is provided at the bottom of the cover 12, as shown in fig. 9 and 10. The first cooling fin 23 is installed on the side wall of the cover 12, the cold conducting fin 21 and the refrigerating fin 22 are installed inside the cover 12, and the first cooling fin 23 penetrates through the side wall of the cover 12 to communicate with the outside air. Wherein, thermal-insulated gasket 25 can be "return" style of calligraphy structure, but is not limited to this structure, and the thermal-insulated gasket of other shapes also can be applicable to the utility model discloses. In this embodiment, the plurality of cold conducting plates 21 are arranged in parallel and vertically mounted on the refrigerating plate 22; the first heat sink 23 includes a mounting portion fixedly connected to the side wall of the cover 12 and a heat dissipating portion having a plurality of sheet-like structures arranged in parallel and vertically connected to the mounting portion. In practice, the first cooling fan 24 is responsible for cooling the hot end, and the first cooling fan 24 blows against the first cooling fin 23; the cold conducting sheet 21 and the refrigerating sheet 22 are used as cold ends, and the temperature of the cold conducting sheet and the refrigerating sheet can be controlled by adjusting voltage; the axial fan 26 guides the cold air generated by the cooling module 2 into the printing chamber 1. The refrigeration components 2 of the present embodiment can be arranged in two groups, which are respectively installed on two opposite sidewalls of the cover 12; the concave-convex plate can be arranged in the cover body 12, so that the space of the refrigerating chamber is reduced, the refrigerating efficiency is improved, and enough space is reserved for the silk material entering the printing chamber.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The multi-nozzle 3D printing device is characterized by comprising a printing chamber (1), a refrigerating chamber (10), a printing assembly arranged in the printing chamber (1) and a refrigerating assembly (2) arranged in the refrigerating chamber (10), wherein the refrigerating chamber (10) is positioned above the printing chamber (1); the printing assembly comprises an X-axis moving assembly (3), a Y-axis moving assembly (4), a Z-axis moving assembly (5), a working platform (6) and a plurality of groups of spray head assemblies (7), wherein the Y-axis moving assemblies (4) are two groups or two groups of Y-axis moving assemblies (4) which are respectively connected to two ends of the X-axis moving assembly (3), and the spray head assemblies (7) are connected with the X-axis moving assembly (3); the Z-axis motion assembly (5) is arranged in the printing chamber (1), and the working platform (6) is connected with the Z-axis motion assembly (5); the printing piece is loaded on a working platform (6), and the spray head assembly (7) is positioned above the working platform (6).

2. The multi-nozzle 3D printing device according to claim 1, further comprising a housing (11) and a cover (12), wherein the cover (12) is hinged to the housing (11); the printing chamber is positioned in the shell (11), and the refrigerating chamber (10) is positioned in the cover body (12).

3. The multi-nozzle 3D printing device according to claim 2, wherein the X-axis moving assembly (3) comprises a first synchronous belt (31), a first motor and two sets of first synchronous wheels (33), the first motor is connected with one set of the first synchronous wheels (33), the first synchronous belt (31) surrounds the peripheries of the two sets of the first synchronous wheels (33), and the nozzle assembly (7) is connected with the first synchronous belt (31).

4. The multi-nozzle 3D printing device according to claim 3, wherein an X-axis guide rod (34) is arranged on the side of the first synchronous belt (31) in parallel, and the nozzle assembly (7) is connected with the X-axis guide rod (34) in a sliding manner; both ends of the X-axis guide rod (34) and the first synchronous wheel (33) are mounted on a first mounting seat (35), and the first mounting seat (35) is connected with the Y-axis moving assembly (4).

5. The multi-nozzle 3D printing device according to claim 4, wherein the Y-axis moving assembly (4) comprises a second synchronous belt (41), a second motor (42) and a plurality of sets of second synchronous wheels (43), the second motor is connected with one set of the second synchronous wheels (43), the other second synchronous wheels (43) are mounted on a supporting shaft (44), the second synchronous belt (41) surrounds the periphery of the two sets of the second synchronous wheels (43), and the first mounting seat (35) is connected with the second synchronous belt (41); the two groups of support shafts (44) are parallel to each other and are fixedly arranged on the inner wall of the shell (11).

6. The multi-nozzle 3D printing device according to any one of claims 1 to 5, wherein the Z-axis moving assembly (5) comprises a third motor (51), a lead screw (52), a support base (53) and a working platform (6), the third motor (51) is installed below the printing chamber (1), the lead screw (52) is connected with the third motor (51), the working platform (6) is installed on the support base (53), and the working platform (6) and the support base (53) are both movably connected with the lead screw (52).

7. The multi-nozzle 3D printing device according to claim 6, wherein a Z-axis guide rod (54) is arranged in parallel on the side of the lead screw (52), and the Z-axis guide rod (54) is fixed in the printing chamber (1); the supporting seat (53) and the working platform (6) are both connected with the Z-axis guide rod (54) in a sliding mode.

8. The multi-nozzle 3D printing device according to claim 1, wherein a plurality of groups of the nozzle assemblies (7) are all mounted on a base (71), a heat dissipation assembly (8) is arranged beside each nozzle assembly (7), the heat dissipation assembly (8) is mounted on a fixing block (83), and the fixing block is mounted on the base (71).

9. The multi-nozzle 3D printing device according to claim 8, wherein the nozzle assembly (7) comprises a feeding guide opening (73), a fourth motor (74), a feeding roller (75), a feeding conduit (87) and a nozzle (76), the feeding roller (75) is communicated between the feeding guide opening (73) and the feeding conduit (87), the feeding roller (75) is connected to an output end of the fourth motor (74), the nozzle (76) is connected to a tail end of the feeding conduit (87), and a heating assembly is arranged beside the nozzle (76).

10. The multi-nozzle 3D printing device according to claim 1, wherein the cooling assembly (2) comprises a plurality of groups of cold guide plates (21), a plurality of groups of refrigerating plates (22) and a plurality of groups of heat dissipation fans (24), the refrigerating plates (22) are arranged on one side of the first cooling fins (23), heat insulation gaskets (25) are arranged on the outer sides of the refrigerating plates, and the first heat dissipation fans (24) are arranged on the other side of the first cooling fins (23); the refrigeration assembly (2) is installed on the side portion of the refrigeration chamber (10), and an axial flow fan (26) which guides cold air to the printing chamber (1) is arranged at the bottom of the refrigeration chamber (10).