Multi-nozzle food 3D printing device with controllable freezing and shaping functions

Abstract

A multi-nozzle food 3D printing device with a controllable freezing and curing function comprises a cooling control mechanism used for curing food and a rotating mechanism installed in a 3D printer nozzle, the cooling control mechanism comprises a condenser, the condenser surrounds the periphery of a charging barrel of a 3D printer, and a refrigerant is liquefied through the condenser to release heat, so that the temperature of the nozzle is increased; the rotating mechanism comprises an outer shell and a driving mechanism, the driving mechanism drives the outer shell to rotate, a plurality of conveying pipes are arranged in the outer shell, one ends of the conveying pipes are connected, openings of the conveying pipes are rotationally connected with an opening in the bottom of the charging barrel, and the other ends of the conveying pipes are communicated with the nozzle. According to the invention, the cooling temperature of the freezing chamber is controlled by changing the pressure intensity of the refrigerant, and the problem of shape fixation of food materials such as protein and active enzyme is solved; the rotating mechanism is arranged in the spray head, the motor drives the material to flow out through the spray nozzle in a rotating mode, and the printed material is rapidly formed in cooperation with the cooling control mechanism.

Description

Technical Field

[0001] The present invention belongs to the field of 3D printing technology, and specifically relates to a multi-nozzle food 3D printing device with controllable freezing and solidification function. Background Art

[0002] 3D printer equipment has been rapidly developed and widely used. At present, 3D printing pens have appeared on the market. 3D printing pens are pens with 3D printing functions. PLA and ABS plastics are melted by heating components, and then continuously transported by the plastic conveying mechanism at the rear end, while the melted plastic fluid is pressed out by the heating components, so as to achieve "writing" or painting on the surface, thereby obtaining 3D object graphics. The melting point of ABS in the current 3D printing pen is generally 217-237℃, and the melting point of PLA is generally 155-185℃. At present, the general heating components are only heated by electricity, and there is no computer or chip control to make the temperature too high or unstable, which leads to the corresponding temperature of the plastic fluid being too high. When it is squeezed out of the pen tip, it is still at a relatively high temperature, which is not conducive to immediate condensation when encountering air, resulting in the printed 3D model often not being able to solidify in time and deforming, and even the overall deformation or collapse of the entire printed model. In food 3D printing, cooling and solidification is a very effective way to ensure printing accuracy. Currently, the commonly used cooling methods are water cooling and liquid nitrogen cooling. Water cooling is a controllable cooling method with more applications, but for food 3D printing, its temperature cannot be lower than 0°C, and the printing material cannot be effectively cooled. In addition, cooling mostly relies on condensers for heat exchange, and the entire print cannot be effectively cooled. Although liquid nitrogen cooling can cool to minus 100-200°C, it can effectively solidify some starch, chocolate, and syrup food materials, but its temperature cannot be controlled. For proteins and active enzymes, too low a temperature will cause them to lose their activity or nutrition. Therefore, this design is a multi-nozzle food 3D printing device with controllable freezing and solidification function, which can control the temperature and viscosity, so that food 3D printing can cool and solidify the entire printed model according to the required temperature, and at the same time will not affect the nozzle and cause the material to block the nozzle. Summary of the invention

[0003] In order to overcome the above shortcomings, the present invention provides a multi-nozzle food 3D printing device with controllable freezing and solidification function.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A multi-nozzle food 3D printing device with controllable freezing and solidification function, comprising a cooling control mechanism for solidifying food and a rotating mechanism installed in the nozzle of a 3D printer, wherein the cooling control mechanism comprises a condenser, which surrounds the outer periphery of the barrel of the 3D printer, and the refrigerant is liquefied and releases heat through the condenser, so that the temperature of the nozzle increases; The rotating mechanism includes an outer shell and a driving mechanism, wherein the driving mechanism drives the outer shell to rotate. A plurality of material delivery pipes are arranged in the outer shell, one end of the plurality of material delivery pipes are connected and the openings are rotatably connected to the openings at the bottom of the barrel, and the other end thereof is connected to the nozzle.

[0005] Further optimization, the cooling control mechanism also includes a compressor, a refrigeration box, a condenser, a bellows and an evaporator. The refrigerant in the pipeline is compressed by the compressor and flows to the evaporator. After being cooled in the freezer, it flows out to the evaporator arranged in the refrigeration box. The bellows is arranged between the nozzle and the freezer, with its upper end connected to the nozzle and its lower end connected to the freezer, and the bellows is connected to the freezer to form a sealed cavity.

[0006] Further optimization is that an expansion valve and a pressure reducer are provided on the refrigerant pipeline, and a baffle is provided in the expansion valve, which is used to reduce the ambient pressure in the pipeline.

[0007] Further optimization is that a solenoid valve is provided at the inlet of the refrigerant pipeline to reduce the temperature of the nozzle.

[0008] Further optimized, the driving mechanism includes a driving wheel, a driven wheel and a bearing, a nut is provided under the bearing, and the outer shell is connected to the nut by screws.

[0009] Further optimized, the upper part of the outer shell is connected to the barrel, and the connection between the two is sealed by a sealing ring.

[0010] According to further optimization, the barrel, the upper portion of the outer shell, the feed pipe and the nozzle are connected to form a sealed cavity.

[0011] In a further optimization, the bearing is fixed below the condenser.

[0012] The beneficial effects of the present invention are The compressor compresses the refrigerant in the pipeline and transports it to the evaporator in the refrigeration box. A one-way valve is installed in the pipe to prevent the refrigerant from flowing back. During the transportation process, the refrigerant in the evaporator vaporizes and absorbs heat, lowering the temperature of the freezer and assisting the solidification of food materials. Then the refrigerant is transported to the expansion valve through the pipeline and transported to the evaporator at the nozzle after pressure reduction. In this process, the refrigerant liquefies and releases heat, preventing the nozzle from being blocked by materials due to too low temperature. The cooling temperature of the freezer is controlled by changing the refrigerant pressure, solving the solidification problem of food materials such as protein and active enzymes. A rotating mechanism is set in the nozzle, and the motor drives the material to rotate and flow out through the nozzle, which cooperates with the cooling control mechanism to make the printed material take shape quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the structure of the evaporator; Figure 3 It is a structural schematic diagram of the rotating mechanism; Figure numerals: 1. one-way valve, 2. compressor, 3. solenoid valve, 4. refrigeration box, 5. condenser, 6. bellows, 7. nozzle, 8. refrigerant, 9. freezer compartment, 10. pressure reducer, 11. expansion valve, 12. evaporator, 13. outer shell, 14. driven wheel, 15. nut, 16. bearing, 17. barrel, 18. motor, 19. driving wheel, 20. sealing ring, 21. nozzle, 22. feed pipe. DETAILED DESCRIPTION

[0014] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is described in detail below in conjunction with specific embodiments. The following embodiments are implemented based on the technical solutions of the present invention, and detailed implementation methods and specific operating procedures are given. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the following embodiments.

[0015] A multi-nozzle food 3D printing device with controllable freezing and solidification function, including a cooling control mechanism for solidifying food and a rotating mechanism installed in the nozzle of a 3D printer, the cooling control mechanism includes a condenser 5, a compressor 2, a refrigeration box 4, a condenser 5, a bellows 6 and an evaporator 12, the condenser 5 surrounds the outer periphery of a barrel 17 of the 3D printer, the refrigerant 8 is liquefied and releases heat through the condenser 5, so that the temperature of the nozzle increases, the refrigerant 8 in the pipeline is compressed by the compressor 2 and flows to the evaporator 12, the evaporator 12 is arranged in the refrigeration box 4, the bellows 6 is arranged between the nozzle and the freezing chamber 9, the upper end of the bellows 6 is connected to the nozzle, the lower end is connected to the freezing chamber 9, and the bellows 6 is connected to the freezing chamber 9 to form a sealed cavity, the pipeline of the refrigerant 8 is provided with an expansion valve 11 and a pressure reducer 10, the expansion valve 11 is provided with a baffle, the baffle is used to reduce the ambient pressure in the pipeline, and the inlet of the pipeline of the refrigerant 8 is provided with a solenoid valve 3, which is used to reduce the temperature of the nozzle. The compressor 2 compresses the refrigerant 8. At this time, the ambient pressure increases, the temperature rises, and the boiling point of the refrigerant 8 increases. After compression, it flows to the evaporator 12 through the one-way valve 1. In this process, the refrigerant 8 vaporizes and absorbs heat, so that the refrigeration box 4 starts to refrigerate until the temperature of the freezer chamber 9 reaches the required temperature, and then printing begins. The freezer chamber 9 is composed of thermal insulation materials. The refrigerant 8 is transmitted to the expansion valve 11. Under the action of the baffle, the ambient pressure decreases, the temperature rises, and the boiling point of the refrigerant 8 decreases. After depressurization, it is transported to the condenser 5. In this process, the refrigerant 8 liquefies and releases heat, so that the temperature of the nozzle 7 increases, and the material will not be blocked by the nozzle due to overcooling. Finally, it returns to the compressor 2 through the pipeline. When the temperature of the nozzle 7 is too high, it can be cooled by the solenoid valve 3.

[0016] The rotating mechanism includes an outer shell 13 and a driving mechanism, and the driving mechanism drives the outer shell 13 to rotate. A plurality of material delivery pipes 22 are arranged in the outer shell 13. One ends of the plurality of material delivery pipes 22 are connected and the openings are rotatably connected to the bottom opening of the barrel 17, and the other ends are connected to the nozzle 21. The driving mechanism includes a driving wheel 19, a driven wheel 14 and a bearing 16. A nut 15 is arranged below the bearing 16. The outer shell 13 is connected to the nut 15 by screws, and the bearing 16 is fixed below the condenser 5.

[0017] The upper portion of the outer shell 13 is connected to the barrel 17, and the joint between the two is sealed by a sealing ring 20. The barrel 17, the upper portion of the outer shell 13, the feed pipe 22 and the nozzle 21 are connected to form a sealed cavity.

[0018] Working process: The compressor compresses the refrigerant 8, which then flows to the evaporator 12 through the one-way valve 1. The refrigerant 8 vaporizes and absorbs heat, causing the refrigeration box 4 to start cooling until the temperature of the freezer chamber 9 reaches the required temperature, thereby assisting the solidification of the food material. The refrigerant 8 is then transmitted to the expansion valve 11. Under the action of the baffle, the ambient pressure decreases, the temperature increases, and the boiling point of the refrigerant 8 decreases. After the pressure is reduced, the refrigerant is transported to the condenser 5 at the bottom of the barrel. At the same time, the motor 18 drives the driven wheel 14 and the driving wheel 19 to rotate, and the driven wheel 14 drives the entire outer shell 13 to rotate, thereby realizing the rotation of the nozzle 7 and then printing the material.

[0019] The above shows and describes the main features, methods of use, basic principles and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements according to actual conditions, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-nozzle food 3D printing device with a controllable freezing and solidification function, comprising a cooling control mechanism for solidifying food and a rotating mechanism installed in a 3D printer nozzle, the cooling control mechanism comprising a condenser (5), the condenser (5) surrounding the outer periphery of a barrel (17) of the 3D printer, the refrigerant (8) liquefies and releases heat through the condenser (5), thereby increasing the nozzle temperature; The rotating mechanism comprises an outer shell (13) and a driving mechanism, wherein the driving mechanism drives the outer shell (13) to rotate, and a plurality of material delivery pipes (22) are arranged in the outer shell (13), one end of the plurality of material delivery pipes (22) are connected and the openings are rotatably connected to the bottom opening of the barrel (17), and the other end thereof is in communication with the nozzle (22).

2. A multi-nozzle food 3D printing device with controllable freezing and solidification function as claimed in claim 1, characterized in that: The cooling control mechanism further comprises a compressor (2), a refrigeration box (4), a condenser (5), a bellows (6) and an evaporator (12); the refrigerant (8) in the pipeline is compressed by the compressor (2) and flows to the evaporator (12); after being cooled in the freezing chamber, it flows out to the evaporator (12) arranged in the refrigeration box (4); the bellows (6) is arranged between the nozzle and the freezing chamber (9); the upper end of the bellows (6) is connected to the nozzle, and the lower end is connected to the freezing chamber (9); and the bellows (6) is connected to the freezing chamber (9) to form a sealed cavity.

3. A multi-nozzle food 3D printing device with controllable freezing and solidification function as claimed in claim 1, characterized in that: An expansion valve (11) and a pressure reducer are provided on the refrigerant (8) pipeline, and a baffle is provided inside the expansion valve (11), the baffle being used to reduce the ambient pressure inside the pipeline.

4. A multi-nozzle food 3D printing device with controllable freezing and solidification function as claimed in claim 1, characterized in that: A solenoid valve (3) is provided at the inlet of the refrigerant (8) pipeline, which is used to reduce the temperature of the nozzle.

5. The multi-nozzle food 3D printing device with controllable freezing and solidification function as claimed in claim 1, characterized in that: The driving mechanism comprises a driving wheel (20), a driven wheel (14) and a bearing (16); a nut is provided below the bearing (16); and the outer shell (13) is connected to the nut (15) via a screw.

6. The multi-nozzle food 3D printing device with controllable freezing and solidification function as claimed in claim 1, characterized in that: The upper portion of the outer shell (13) is connected to the barrel (17), and the junction between the two is sealed by a sealing ring (21).

7. The multi-nozzle food 3D printing device with controllable freezing and solidification function as claimed in claim 1, characterized in that: The barrel (17), the upper part of the outer shell (13), the feed pipe (22) and the nozzle (7) are connected to form a sealed cavity.

8. The multi-nozzle food 3D printing device with controllable freezing and solidification function as claimed in claim 1, characterized in that: The bearing (16) is fixed below the condenser (5).

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