CN204894550U - Compressor cooling and ball drive integral type parallel arm three -dimensional inkjet printer - Google Patents

Abstract

Compressor cooling and ball screw drive integrated parallel arm 3D printer, including a base with an equilateral triangle structure, three support columns are vertically arranged at the three corners of the base, and a mounting plate is installed horizontally on the top of the three support columns. There is a raw material extruder on the top, and a pulley slides along the vertical direction on the inside of each support column. A ball screw drive mechanism is installed between the support column and the pulley. A parallel arm of the same structure is hinged on the inside of each pulley. The parallel arm The lower end of the extruder is hinged with an extrusion worktable, and the center of the extrusion workbench is provided with an extrusion head. The inlet end of the extrusion head is connected to the discharge port of the raw material extruder through a raw material pipe, and a heater is wrapped outside the extrusion head. ; One side of the bottom of the extruding table is connected with a cold wind generator through a connecting plate. 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

Compressor cooling and ball screw drive integrated parallel arm 3D printer

technical field

The utility model belongs to the technical field of three-dimensional forming, in particular to a parallel-arm three-dimensional printer integrated with compressor cooling and ball screw drive.

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 integrated compressor cooling and ball screw drive with compact structure, high strength, good transmission stability, shortening the cooling time of hot-melt materials, and improving printing accuracy. Parallel arm 3D printer.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solution: a parallel-arm 3D printer integrated with compressor cooling and ball screw drive, including a base in an equilateral triangle structure, and three supports are arranged vertically at the three corners of the base. There is a horizontal installation plate on the top of the three support columns, a raw material extruder is installed on the installation plate, a pulley is installed on the inner side of each support column along the vertical direction, and a ball screw drive mechanism is installed between the support column and the pulley. The inner side of each pulley is hinged with parallel arms of the same structure, the lower end of the parallel arm is hinged with an extrusion workbench, the center of the extrusion workbench is provided with an extrusion head, and the inlet end of the extrusion head passes through the raw material pipe and the raw material extruder The outlet of the extrusion head is connected with a heater; the bottom side of the extrusion workbench is connected with a cold wind generator through a connecting plate;

The cold wind generator includes a shell, which is provided with a box body and a refrigeration compressor, a condenser, a condensing radiator, a throttle valve, an air volume regulating motor and a turbo fan at the top of the box body, and an evaporator and a fan for cooling are arranged in the box body. The damper that adjusts the size of the cross-sectional area of the ventilation in the box, the middle 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 condensing radiator is set on the condenser, and the housing is equipped with a neighboring refrigeration unit. The heat dissipation air inlet window of the 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 an inlet and outlet for the turbo fan. The cooling air inlet window connected to the air outlet, the box body is provided with an air inlet port connected with the air outlet of the turbo fan, and the air door is located between the air inlet port and the evaporator; the box body is connected with an air guide cover at the end adjacent to the evaporator, and the air guide The outlet of the cover is connected with a cooling nozzle protruding from the shell, the air outlet of the cooling nozzle faces the outlet of the extrusion head, and the upper part of the cooling nozzle is fixedly connected with the connecting plate;

The middle part of the support column is provided with a slideway along the vertical direction, and the inside of the support column is provided with a guide hole connected with the slideway along the vertical direction. The ball screw drive mechanism includes a stepping motor, a screw and a connecting seat, and the inner end of the connecting seat passes through the guide hole. The hole is fixedly connected with the pulley, the stepping motor is set in the base, the lead screw is set in the slideway along the vertical direction, the lead screw passes through the connecting seat and is threadedly connected with the connecting seat, the support column is provided with a fixed seat at the top of the slideway, and the lead screw The upper end is rotatably connected in the fixed seat, and the stepper motor is connected to the lower end of the lead screw through a coupling;

An electric control device is arranged on the side of the base, and the electric control device is respectively connected with a raw material extruder, a heater, a turbo blower, a refrigeration compressor, an air volume regulating motor and a stepping motor.

The base is provided with a fixed plate between the three support columns.

By adopting the above technical scheme, the utility model has the following beneficial effects:

1. The ball screw drive mechanism is set between each supporting column and the corresponding pulley. The ball screw drive mechanism uses a stepping motor to drive the screw to rotate, and the rotation of the lead screw is converted into the up and down linear motion of the pulley. This principle realizes linear motion , the pulley moves up and down more smoothly, and the movement accuracy is higher, so as to ensure that the parallel arm drives the extrusion table to run more smoothly.

2. An integrated structure is adopted between the cold air generator and the extrusion workbench, which makes the whole machine compact and small in size, so that the generated cold air can be blown to the outlet of the extrusion head quickly, and the air duct is omitted, so the cold air does not It will exchange heat with the outside through a long air duct, thereby improving cooling efficiency and effect. 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, and becomes a low temperature and low pressure liquid after being throttled by a throttle valve. 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 fan blows into the box, and the air flows through the evaporator to be refrigerated. The cold air is sprayed to the exit of the extrusion head through the air guide cover and cooling nozzle, and the extrusion head squeezes the semi-fluid material When it comes out, it is 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 utility model has the advantages of novel design, compact structure, high transmission stability, timely cooling of the extruded hot-melt material, no deformation of the printed product, and greatly improved printing accuracy.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of the plane structure of the utility model;

Fig. 3 is a structural schematic diagram of the appearance of the intercooled wind generator of the present invention;

Fig. 4 is a schematic diagram of the internal structure of the intercooler wind generator of the present invention.

Detailed ways

As shown in Figures 1 to 4, the compressor cooling and ball screw driving integrated parallel arm 3D printer of the present invention includes a base 1 in an equilateral triangle structure, on which three corners are vertically provided with three Support column 2, the top of three support columns 2 is provided with mounting plate 3 horizontally, and raw material extruder 4 is arranged on the mounting plate 3, and the inner side of each support column 2 slides along the vertical direction and is provided with a pulley 6, between the support column 2 and the pulley 6 There is a ball screw driving mechanism in between, and the inside of each pulley 6 is hinged with a parallel arm 7 of the same structure, and the lower end of the parallel arm 7 is hinged with an extrusion table 8, and an extrusion head is arranged at the center of the extrusion table 9. The inlet end of the extrusion head 9 is connected to the discharge port of the raw material extruder 4 through the raw material pipe 10, and the exterior of the extrusion head 9 is wrapped with a heater 11; Cold wind generator 5.

The cold wind generator 5 comprises a housing 13, which is provided with a box body 14 and a refrigeration compressor 15, a condenser 16, a condensation radiator 17, a throttle valve 31, an air volume regulating motor 32 and a turbine at the top of the box body 14. Fan 12, the box body 14 is provided with an evaporator 33 and a damper 34 for adjusting the ventilation cross-sectional area in the box body 14, the damper 34 middle part is vertically provided with a rotating shaft 35 that is connected to the box body 14, and the air volume adjustment motor 32 The main shaft is in drive connection with the rotating shaft 35, and the condensing radiator 17 is arranged on the condenser 16. The housing 13 is provided with a radiating inlet window 36 adjacent to the refrigeration compressor 15 and a radiating outlet window 37 adjacent to the condensing radiator 17. Machine 15, condenser 16, throttling valve 31, evaporator 33 and refrigerating compressor 15 are connected through pipelines in sequence, and housing 13 is provided with the cooling air inlet window 38 that is connected with turbofan 12 air inlets, and box body 14 An air inlet communicating with the air outlet of the turbo fan 12 is provided, and the damper 34 is located between the air inlet and the evaporator 33; the box body 14 is connected with an air guide cover 18 at an end adjacent to the evaporator 33, and the outlet of the air guide cover 18 is connected There is a cooling nozzle 20 protruding outward from the housing 13 , the air outlet of the cooling nozzle 20 faces the outlet of the extrusion head 9 , and the upper part of the cooling nozzle 20 is fixedly connected with the connecting plate 30 .

The middle part of the support column 2 is provided with a slideway 21 along the vertical direction, and the inner side of the support column 2 is provided with a guide hole 22 communicating with the slideway 21 along the vertical direction. The ball screw drive mechanism includes a stepping motor 23, a screw 24 and a connecting seat 25 , the inner end of the connecting seat 25 passes through the guide hole and is fixedly connected with the pulley 6, the stepping motor 23 is arranged in the base 1, the screw 24 is arranged in the slideway 21 along the vertical direction, and the leading screw 24 passes through the connecting seat 25 and is connected with the Seat 25 is threaded, and support column 2 is provided with fixed seat 26 at slideway 21 tops, and leading screw 24 upper ends are rotatably connected in fixed seat 26, and stepper motor 23 is connected with leading screw 24 lower end transmissions by coupling 27.

The side of base 1 is provided with electric control device 29, and electric control device 29 is connected with raw material extruder 4, heater 11, turbo blower 12, refrigeration compressor 15, air volume regulating motor 32 and stepper motor 23 respectively.

The base 1 is provided with a fixing plate 28 between the three support columns 2 .

The ball screw driving mechanism that is arranged between each supporting column 2 and the corresponding pulley 6, the ball screw driving mechanism adopts a stepping motor 23 to drive the screw 24 to rotate, and the rotation of the leading screw 24 is converted into the up and down linear motion of the pulley 6. The principle realizes linear motion, the pulley 6 moves up and down more smoothly, and the movement accuracy is higher, thereby ensuring that the parallel arm 7 drives the extrusion table 8 to run more smoothly.

The refrigeration principle of the utility model is: the refrigeration compressor 15 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 16. After being throttled by the throttle valve 31, it becomes a low-temperature and low-pressure liquid. of liquid. The low-temperature and low-pressure liquid refrigerant is sent to the evaporator 33, absorbs heat and evaporates in the evaporator 33 to become a high-temperature and low-pressure steam, and is sent to the refrigeration compressor 15 again, thereby completing the refrigeration cycle.

After the air in the box body 14 is refrigerated, the turbo blower 12 blows air into the box body 14, and the air flow passes through the evaporator 33 to be refrigerated, and the cold air is sprayed to the exit of the extrusion head through the air guide cover 18 and the cooling nozzle 20, and the extrusion head The semi-fluid material is extruded, cooled by the cold wind, and quickly 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 32 drives the damper 34 to rotate through the rotating shaft 35, and the rotation of the damper 34 can adjust the ventilation cross-sectional area of the box body 14, thereby adjusting the air volume of the cooling nozzle 20 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 (2)

1. compressor cooling and ball-screw drive integral type parallel arm three-dimensional printer, it is characterized in that: comprise the base in equilateral triangle structure, base is vertically provided with three support columns respectively at three drift angle places, three support column top levels are provided with installing plate, installing plate is provided with raw material extruder, vertically slide inside every root support column and be provided with coaster, ball screw drive mechanism is provided with between support column and coaster, mutually isostructural parallel arm is all hinged with inside each coaster, the lower end of parallel arm is hinged with extrudes workbench, the center of extruding workbench is provided with extruder head, the entrance point of extruder head is connected with the discharging opening of raw material extruder by mother tube, extruder head outer wrap having heaters, extrude side bottom workbench and be connected with cold wind generator by connecting plate,

Cold wind generator comprises housing, be provided with box body in housing and be positioned at the refrigeration compressor at box body top, condenser, condensation radiator, choke valve, air quantity regulates motor and turbofan, evaporimeter is provided with and for regulating the air door of ventilation-sectional area size in box body in box body, the rotating shaft be rotatably connected on box body is vertically provided with in the middle part of air door, air quantity regulates the main shaft of motor to be connected with rotating shaft transmission, condensation radiator is located on condenser, housing is provided with the heat radiation air-inlet window of contiguous refrigeration compressor and the heat radiation air outlet window of contiguous condensation radiator, refrigeration compressor, condenser, choke valve, evaporimeter and refrigeration compressor sequentially pass through pipeline and are connected, housing is provided with the cooling air-inlet window be connected with turbofan air inlet, box body is provided with the air intake vent be communicated with turbofan air outlet, air door is between air intake vent and evaporimeter, box body is connected with wind scooper in one end of contiguous evaporimeter, and the outlet of wind scooper is connected with the cooling jet stretched out outside housing, and the blowing mouth of cooling jet is towards the outlet of extruder head, and cooling jet top is fixedly connected with connecting plate,

Vertically slideway is provided with in the middle part of support column, the pilot hole be communicated with slideway is vertically provided with inside support column, ball screw drive mechanism comprises stepper motor, leading screw and Connection Block, Connection Block the inner is fixedly connected with coaster through pilot hole, stepper motor is located in base, leading screw is vertically located in slideway, leading screw passes Connection Block and is threaded with Connection Block, support column is provided with holder on slideway top, leading screw upper end is rotatably connected in holder, and stepper motor is in transmission connection by shaft coupling and leading screw lower end;

Base sidepiece is provided with electric control gear, and electric control gear regulates motor and stepper motor to be connected with raw material extruder, heater, turbofan, refrigeration compressor, air quantity respectively.

2. compressor cooling according to claim 1 and ball-screw drive integral type parallel arm three-dimensional printer, it is characterized in that: described base is provided with the fixed head between three support columns.