CN204894548U - Compressor refrigeration formula three -dimensional inkjet printer's fan cooler - Google Patents

Abstract

The air-cooling device of the compressor refrigeration type 3D printer includes a compressor refrigerator and an X-axis frame, an X-axis guide rail is arranged on the X-axis frame, and a three-dimensional material extrusion assembly is provided sliding on the X-axis guide rail; the three-dimensional material extrusion assembly includes Slide the slider set on the X-axis guide rail. The slider is equipped with an extruder. Get ahead. The utility model has the advantages of novel design, compact structure, high transmission stability, timely cooling of extruded hot-melt materials, no deformation of printed products, and greatly improved printing accuracy.

Description

Air-cooling device for compressor-refrigerated 3D printers

technical field

The utility model belongs to the technical field of three-dimensional forming, in particular to an air cooling device of a compressor refrigeration type three-dimensional printer.

Background technique

3D printing technology is based on the computer 3D design model, through the software layered discrete and numerical control forming system, using laser beams, hot-melt nozzles, etc. to accumulate metal powder, ceramic powder, plastic, cell tissue and other special materials layer by layer Bonding, and finally overlaying and molding to create a solid product. 3D printing transforms a 3D entity into several 2D planes. By processing materials and superimposing them layer by layer for production, the complexity of manufacturing is greatly reduced. This digital manufacturing model can generate parts of any shape directly from computer graphics data. Fused deposition modeling (FDM) technology is a mainstream technology in 3D printing technology. FDM technology divides the CAD model into layers of extremely thin sections to generate two-dimensional geometric information that controls the trajectory of the nozzle of the 3D printer. The heating head of the 3D printer heats the hot-melt material (ABS resin, nylon, wax, etc.) The material in a fluid state is extruded and solidifies to form a thin layer in the shape of the contour. When one layer is completed, the new cambium is lowered by the vertical lifting system for curing. In this way, the layers are stacked and bonded to form the three-dimensional solid of the model from bottom to top.

One of the key problems of 3D printers using FDM technology is the molding accuracy. There are many factors that affect the molding accuracy, including frame strength, transmission stability, and cooling of hot-melt materials. Insufficient strength of the frame will lead to changes in the assembly size of the printer during the working process, which will affect the forming accuracy; insufficient strength will also lead to low transmission stability, and the frame will vibrate during the printing head running, which will reduce the printing accuracy; If the molten material is cooled too slowly after being extruded through the extrusion head, the hot-melt material will be naturally elongated by gravity, resulting in the deformation of the printed model. Therefore, in order to improve the printing accuracy, it is urgent to improve the existing 3D printers.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides an air-cooling device for a compressor-refrigerated three-dimensional printer with compact structure, high strength, good transmission stability, shortened cooling time of hot-melt materials, and improved printing accuracy. .

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: the air-cooling device of the compressor-refrigerated 3D printer includes a compressor refrigerator and an X-axis frame, the X-axis frame is provided with an X-axis guide rail, and slides on the X-axis guide rail. Equipped with three-dimensional material extrusion components;

The three-dimensional material extrusion component includes a slider that slides on the X-axis guide rail. An extruder is installed on the slider. The discharge port at the lower end of the extruder is connected with an extrusion tube. The lower end of the outlet pipe is connected with an extrusion head;

The compressor refrigerator includes a shell, in which there is a box body and a refrigeration compressor, a condenser, a condensing radiator, a throttle valve, an air volume regulating motor and a turbo fan located on the top of the box body, and an evaporator and an evaporator are arranged in the box body. The damper is used to adjust the cross-sectional area of ventilation in the box body. The middle part of the damper is vertically provided with a rotating shaft connected to the box body. The main shaft of the air volume adjustment motor is connected to the rotating shaft. The heat dissipation air inlet window of the refrigeration compressor and the heat dissipation air outlet window adjacent to the condensing radiator, the refrigeration compressor, the condenser, the throttle valve, the evaporator and the refrigeration compressor are connected through pipelines in sequence, and the housing is provided with a turbine fan. The cooling air inlet window connected to the air inlet, the air inlet connected to the air outlet of the turbo fan is arranged on the box body, and the air door is located between the air inlet and the evaporator; the air guide cover is connected to the end adjacent to the evaporator on the box body, and the air guide The outlet of the air cover is connected with a cold air pipe extending out of the housing, the cold air pipe is connected with a cooling nozzle, the cooling nozzle is arranged below the slide block through the connecting plate, and the blowing port of the cooling nozzle faces the outlet of the extrusion head.

Adopting the above-mentioned technical solution, the compressor refrigeration type 3D printer also includes the following technical features: it also includes a Y-axis frame, a Y-axis stepping motor is arranged on the rear side of the Y-axis frame, a Y-axis guide rail is horizontally arranged on the Y-axis frame, and the Y-axis guide rail The upper slide is equipped with a processing platform, and the Y-axis stepping motor is connected to the bottom of the processing platform through the Y-axis synchronous belt transmission mechanism. The left and right sides of the processing platform are fixedly connected with the Z-axis frame, and the bottom of the Z-axis frame is equipped with a Z-axis stepping motor. The Z-axis frame is equipped with a Z-axis guide rail, and the X-axis frame slides on the Z-axis guide rail. The Z-axis stepping motor is connected to the X-axis frame through a ball screw pair. One end of the X-axis frame is equipped with an X-axis stepping motor. The X-axis stepping motor is connected to the three-dimensional material extrusion assembly through the X-axis synchronous belt transmission mechanism; the compressor refrigerator is fixed on the side of the Z-axis frame; between the processing platform and the Y-axis guide rail, the X-axis frame and the Z-axis guide rail between the slide block and the X-axis guide rail are slidingly connected by sliding bearings.

The above technical solution of the compressor-refrigerated three-dimensional printer has the following beneficial effects:

1. The X-axis, Y-axis and Z-axis are all driven by stepping motors, and ball screw pairs or synchronous belt transmission mechanisms are used as the transmission mechanism, and precision sliding bearings are used at the sliding joints to move smoothly. The movement precision is high, thereby improving the stability and movement precision of the three-dimensional material extrusion components.

2. The refrigeration principle of the utility model is: the refrigeration compressor compresses the refrigerant from a low-temperature and low-pressure gas into a high-temperature and high-pressure gas, and then condenses it into a normal-temperature and high-pressure liquid through a condenser. After being throttled by a throttle valve, it becomes a low-temperature and low-pressure liquid. liquid. The low-temperature and low-pressure liquid refrigerant is sent into the evaporator, absorbs heat and evaporates in the evaporator to become high-temperature and low-pressure steam, and is sent to the refrigeration compressor again to complete the refrigeration cycle.

After the air in the box is refrigerated, the turbo blower blows into the box, the air flows through the evaporator to be cooled, and the cold air is sprayed to the exit of the extrusion head through the air guide cover, cold air pipe and cooling nozzle, and the extrusion head converts the semi-fluid state The material is extruded, cooled by the cold wind, and quickly solidifies to form a thin layer of contour shape. In this way, it is avoided that the cooling time is too long, resulting in the deformation of the hot-melt material due to its own gravity.

The air volume adjustment motor drives the damper to rotate through the rotating shaft, and the rotation of the damper can adjust the ventilation cross-sectional area of the box, thereby adjusting the air volume of the cooling nozzle to achieve the purpose of adjusting the cooling effect.

To sum up, the compressor-cooled 3D printer has a novel design, compact structure, and high transmission stability. It cools the extruded hot-melt material in time, the printed product will not be deformed, and the printing accuracy is greatly improved.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a compressor refrigeration type 3D printer;

Fig. 2 is a schematic diagram of the internal structure of the compressor refrigerator in Fig. 1;

Fig. 3 is an enlarged view of the three-dimensional material extrusion component in Fig. 1 .

Detailed ways

As shown in Figures 1-3, the compressor-refrigerated 3D printer includes a compressor refrigerator and a Y-axis frame 2, a Y-axis stepping motor 3 is provided on the rear side of the Y-axis frame 2, and a Y-axis stepper motor 3 is arranged on the Y-axis frame 2 horizontally. Y-axis guide rail 4, a processing platform 5 slides on the Y-axis guide rail 4, Y-axis stepping motor 3 is connected to the bottom of the processing platform 5 through the Y-axis synchronous belt transmission mechanism 6, and the left and right sides of the processing platform 5 are fixedly connected with Z-axis Frame 7, Z-axis stepping motor 8 is provided at the bottom of Z-axis frame 7, Z-axis guide rail 9 is provided on Z-axis frame 7, and X-axis frame 10 is provided sliding on Z-axis guide rail 9, and Z-axis stepping motor 8 passes through the ball The screw pair 11 is connected to the X-axis frame 10 by transmission. An X-axis stepping motor 12 is provided at one end of the X-axis frame 10. An X-axis guide rail 13 is provided on the X-axis frame 10. A three-dimensional material extrusion is provided for sliding on the X-axis guide rail 13. Component 14, X-axis stepper motor 12 is connected to the three-dimensional material extrusion component 14 through X-axis synchronous belt transmission mechanism 15; the compressor refrigerator is fixed on the side of Z-axis frame 7 .

The three-dimensional material extruding assembly 14 includes a slide block 16 slidably arranged on the X-axis guide rail 13. The slide block 16 is provided with an extruder 17, and the discharge port at the lower end of the extruder 17 is connected with an extrusion pipe 18. The extrusion pipe 18 is provided with a heater 19, and the lower end of the extrusion pipe 18 is connected with an extrusion head 30.

The compressor refrigerator includes a housing 20, which is provided with a box body 21 and a refrigeration compressor 22, a condenser 23, a condensation radiator 24, a throttle valve 25, an air volume regulating motor 26 and a turbine at the top of the box body 21. Blower fan 27, box body 21 is provided with evaporator 28 and is used to regulate the damper 31 of ventilation cross-sectional area size in box body 21, damper 31 middle part is vertically provided with the rotating shaft 32 that is connected on the box body 21, the air volume adjustment motor 26 The main shaft is in transmission connection with the rotating shaft 32, and the condensing radiator 24 is arranged on the condenser 23. The housing 20 is provided with a radiating inlet window 33 adjacent to the refrigeration compressor 22 and a radiating outlet window 34 adjacent to the condensing radiator 24. Machine 22, condenser 23, throttle valve 25, evaporator 28 and refrigerating compressor 22 are connected through pipelines sequentially, and housing 20 is provided with the cooling air inlet window 35 that is connected with turbine blower 27 air inlets, and box body 21 An air inlet communicating with the air outlet of the turbo fan 27 is provided, and the damper 31 is located between the air inlet and the evaporator 28; the box body 21 is connected with an air guide cover 36 at an end adjacent to the evaporator 28, and the outlet of the air guide cover 36 is connected There is a cold air pipe 37 protruding from the housing 20, the cold air pipe 37 is connected with a cooling nozzle 38, the cooling nozzle 38 is arranged below the slide block 16 through a connecting plate 39, and the blowing port of the cooling nozzle 38 is towards the outlet of the extrusion head 30.

Between the processing platform 5 and the Y-axis guide rail 4 , between the X-axis frame 10 and the Z-axis guide rail 9 , and between the slider 16 and the X-axis guide rail 13 are slidingly connected by sliding bearings 29 .

The X-axis, Y-axis and Z-axis are all driven by stepping motors, and the ball screw pair 11 or the synchronous belt transmission mechanism are used as the transmission mechanism, and precision sliding bearings 29 are used at the sliding joints, and the movement is stable. The movement precision is high, thereby improving the stability and movement precision of the three-dimensional material extruding component 14 .

The refrigeration principle of the utility model is: the refrigeration compressor 22 compresses the refrigerant from a low-temperature and low-pressure gas into a high-temperature and high-pressure gas, and then condenses it into a normal-temperature and high-pressure liquid through the condenser 23. After being throttled by the throttle valve 25, it becomes a low-temperature and low-pressure liquid. of liquid. The low-temperature and low-pressure liquid refrigerant is sent to the evaporator 28, absorbs heat and evaporates in the evaporator 28 to become high-temperature and low-pressure steam, and is sent to the refrigeration compressor 22 again to complete the refrigeration cycle.

After the air in the box body 21 is refrigerated, the turbo blower 27 blows air into the box body 21, the air flows through the evaporator 28 to be refrigerated, and the cold air is sprayed to the exit of the extrusion head through the wind guide 36, the cold air pipe 37 and the cooling nozzle 38 , the extrusion head extrudes the material in a semi-fluid state, and after being cooled by the cold wind, it is rapidly solidified to form a thin layer of contour shape. In this way, it is avoided that the cooling time is too long, resulting in the deformation of the hot-melt material due to its own gravity.

The air volume regulating motor 26 drives the damper 31 to rotate through the rotating shaft 32, and the rotation of the damper 31 can adjust the ventilation cross-sectional area of the box body 21, thereby adjusting the air volume of the cooling nozzle 38 to achieve the purpose of adjusting the cooling effect.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model belong to the technology of the utility model. protection scope of the program.

Claims (1)

1. The air-cooling device of the compressor-refrigerated 3D printer, which is characterized in that: it includes a compressor refrigerator and an X-axis frame, the X-axis frame is provided with an X-axis guide rail, and a 3D material extruding component is provided for sliding on the X-axis guide rail; The three-dimensional material extrusion component includes a slider that slides on the X-axis guide rail. An extruder is installed on the slider. The discharge port at the lower end of the extruder is connected with an extrusion tube. The lower end of the outlet pipe is connected with an extrusion head; The compressor refrigerator includes a shell, in which there is a box body and a refrigeration compressor, a condenser, a condensing radiator, a throttle valve, an air volume regulating motor and a turbo fan located on the top of the box body, and an evaporator and an evaporator are arranged in the box body. The damper is used to adjust the cross-sectional area of ventilation in the box body. The middle part of the damper is vertically provided with a rotating shaft connected to the box body. The main shaft of the air volume adjustment motor is connected to the rotating shaft. The heat dissipation air inlet window of the refrigeration compressor and the heat dissipation air outlet window adjacent to the condensing radiator, the refrigeration compressor, the condenser, the throttle valve, the evaporator and the refrigeration compressor are connected through pipelines in sequence, and the housing is provided with a turbine fan. The cooling air inlet window connected to the air inlet, the air inlet connected to the air outlet of the turbo fan is arranged on the box body, and the air door is located between the air inlet and the evaporator; the air guide cover is connected to the end adjacent to the evaporator on the box body, and the air guide The outlet of the air cover is connected with a cold air pipe extending out of the housing, the cold air pipe is connected with a cooling nozzle, the cooling nozzle is arranged below the slide block through the connecting plate, and the blowing port of the cooling nozzle faces the outlet of the extrusion head.