CN113119461A

CN113119461A - 3D printing device capable of adjusting air pressure

Info

Publication number: CN113119461A
Application number: CN202110448469.1A
Authority: CN
Inventors: 余旺旺; 张�杰; 王新洲
Original assignee: Nanjing Vocational University of Industry Technology NUIT
Current assignee: Nanjing Vocational University of Industry Technology NUIT
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-07-16
Anticipated expiration: 2041-04-25
Also published as: CN113119461B

Abstract

The invention discloses a 3D printing device capable of adjusting air pressure, which relates to the technical field of 3D printing and comprises a 3D printer box body, wherein a base and printing equipment are arranged in the 3D printer box body, a processing table and a limiting assembly for limiting the processing table are arranged on the base, a lifting part for adjusting the height of the processing table is arranged on the 3D printer box body, a heat dissipation part for dissipating heat in the 3D printer box body is arranged on the side surface of the 3D printer box body, a supporting plate is arranged on the back surface of the 3D printer box body, a vacuum pump is arranged on the supporting plate, a connecting pipe and a flow guide pipe are arranged on the vacuum pump, a vacuum valve is arranged on the flow guide pipe and communicated with the inside of the 3D printer box body, a sealing door is arranged on the front surface of the 3D printer box body; the temperature change and the cooling speed of the FDM product in the forming process are adjusted by controlling the ambient air pressure, so that the precision and the mechanical property of the printed product are effectively improved.

Description

3D printing device capable of adjusting air pressure

Technical Field

The invention relates to the technical field of 3D printing, in particular to a 3D printing device capable of adjusting air pressure.

Background

In recent years, 3D printing technology has attracted extensive attention from various industries, and compared with the conventional manufacturing technology, 3D printing technology can realize the manufacturing of complex parts, shorten the product research and development time, produce products which are difficult to process by the conventional processing method, and has great application prospects in the fields of automobile industry, energy industry, commercial machines, medical instruments, aerospace and the like.

Fused Deposition Modeling (FDM) is one of the most common techniques in 3D printing, and the basic process thereof is heating thermoplastic plastics and low-melting-point metal wire materials to a molten state, depositing the materials on a working platform according to a preset motion trajectory, stacking layer by layer, cooling and shaping, and can be summarized by 'a point-acting line, a line-acting plane, a plane-acting body', however, the fused deposition material is rapidly cooled in the printing process, thereby causing the accumulation of residual stress, and further affecting the dimensional accuracy and mechanical strength of the printed product, therefore, some enterprises have studied to regulate the intensity of convective heat transfer by controlling the ambient air pressure, further regulate the temperature change in the forming process of the FDM product, although the fused deposition modeling is initially effective, in a vacuum environment, the heat cannot be dissipated by way of forced convective heat transfer with the gas, that is, a fan loses the heat dissipation function, causing the temperature of a conduit in a heat dissipation rib to rise, and, Printing wire rod rigidity after being heated descends, and the nozzle extrudes required pressure not enough, causes the shower nozzle to block up, consequently, needs provide the 3D printing device of an adjustable atmospheric pressure and solves above-mentioned problem.

Disclosure of Invention

The invention aims to provide a 3D printing device capable of adjusting air pressure, so as to solve the defects caused in the prior art.

The utility model provides a 3D printing device of adjustable atmospheric pressure, includes the 3D printer box, be equipped with base and printing apparatus in the 3D printer box, be equipped with the processing platform on the base and carry out spacing subassembly to the processing platform, be equipped with the lift part of adjusting the processing platform height on the 3D printer box, 3D printer box side is equipped with carries out radiating heat-dissipating part to its inside, 3D printer box back installation backup pad, install the vacuum pump in the backup pad, be equipped with connecting pipe and honeycomb duct on the vacuum pump, be equipped with vacuum valve and communicate inside the 3D printer box on the honeycomb duct, the sealed door is openly installed to the 3D printer box.

Preferably, the heat dissipation part comprises a water tank fixedly connected to the outer side wall of the 3D printer box body, a plurality of heat dissipation fins are inserted into the side wall of the water tank in a penetrating manner, a water pump is installed in the water tank, a water inlet pipe is arranged on the water pump, a heat conduction ring is connected to the outer side of the printing head of the printing device, a guide plate is installed outside the heat conduction ring, a seal sleeve is sleeved outside the guide plate, the water inlet pipe is communicated with the seal sleeve, a water outlet pipe is arranged on the seal sleeve, and the.

Preferably, the water tank is provided with a support frame, and the support frame is provided with a fan.

Preferably, the lifting component comprises two supporting blocks arranged on the upper surface of the 3D printer box body, a first rotating shaft is connected between the two supporting blocks in a rotating mode, one end of the first rotating shaft is connected with an output shaft of a motor, the motor is arranged on one supporting block, rotating rollers are sleeved at two ends of the rotating shaft, one ends of connecting ropes are fixedly connected to the outer ends of the rotating rollers, and the other ends of the connecting ropes penetrate into the 3D printer box body and are fixedly connected with the base.

Preferably, the processing table is provided with clamping grooves on two sides, the limiting assembly comprises a bidirectional screw rod installed in the base, the bidirectional screw rod is externally connected with a first bevel gear, the inner wall of the base is rotatably connected with a second rotating shaft, one end of the second rotating shaft is provided with a second bevel gear meshed with the first bevel gear, the other end of the second rotating shaft extends out of the base and is fixedly connected with a rotating block, threaded sleeves are connected on two sides of the bidirectional screw rod in a threaded manner, one end of each threaded sleeve penetrates through a sliding groove in the base and is fixedly connected with a connecting frame, one end of each connecting frame is fixedly connected with a clamping block, and the clamping blocks are connected with the.

Preferably, a handle is arranged on the sealing door.

The invention has the advantages that: (1) the water pump passes through the inlet tube with water and carries in the sealing boot, the sealing boot flows along the guide plate, absorb the heat on the heat conduction ring, then flow back to in the radiating part through the outlet pipe, reach the radiating effect to printing equipment, prevent that the temperature on the heat conduction ring is higher than the glass transition temperature of printing material, and heat radiation fins absorbs the heat of aquatic, the fan starts dispels the heat to heat radiation fins, thereby can make the inside water of radiating part can recycle, be favorable to the water economy resource, and dispel the heat through water, need not to adopt the fan to use inside the 3D printer box, can avoid the inside air flow of 3D printer box to cause the influence to the product of printing out, be favorable to improving the quality of printing, and can improve the life who beats printer head.

(2) The rotating block is rotated to drive the second bevel gear on the second rotating shaft to rotate, the second bevel gear drives the bidirectional screw rod to rotate through the rotating block, the bidirectional screw rod rotates to drive the connecting frame on the shaft sleeve to move, the clamping block moves along with the connecting frame, the clamping block clamps the machining table through the clamping groove, and the machining table is convenient to mount and dismount and is convenient to replace and clean.

(3) The motor starts to drive the first rotation of pivot, changes the roller and rotates along with pivot, can carry out the rolling then with connecting the rope or descend, and the base removes along with connecting the rope, can carry out height-adjusting, makes things convenient for the printing head to make to the product.

(4) The vacuum pump is arranged, and the vacuum valve is arranged to control the air pressure; the temperature change and the cooling speed of the FDM product in the forming process are adjusted by controlling the ambient air pressure, so that the precision and the mechanical property of the printed product are effectively improved.

Drawings

Fig. 1 and 2 are schematic structural diagrams of the present invention at different angles.

FIG. 3 is a schematic view of the internal structure of the present invention.

Fig. 4 is a schematic view of the internal structure of the sealing sleeve of the present invention.

Fig. 5 is a schematic structural view of the elevating member of the present invention.

Fig. 6 is a schematic view of the internal structure of the base of the present invention.

Fig. 7 is a schematic structural view of the bidirectional screw rod of the present invention.

The printing device comprises a 1, a 3D printer box body; 2. a sealing door; 3. a handle; 4. a heat dissipating member; 401. a water tank; 402. heat dissipation fins; 403. a water pump; 404. a water inlet pipe; 405. sealing sleeves; 406. a heat conducting ring; 407. a water outlet pipe; 408. a support frame; 409. a fan; 410. a baffle; 5. a lifting member; 501. a motor; 502. a first rotating shaft; 503. rotating the roller; 504. connecting ropes; 505. a support block; 6. a support plate; 7. a vacuum pump; 8. a connecting pipe; 9. a flow guide pipe; 10. a vacuum valve; 11. a printing device; 13. a base; 14. a processing table; 15. a bidirectional screw rod; 16. a first bevel gear; 17. a second rotating shaft; 18. a second bevel gear; 19. rotating the block; 20. a threaded sleeve; 21. a connecting frame; 22. a clamping block; 23. a clamping groove.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 7, a 3D printing device of adjustable atmospheric pressure, including 3D printer box 1, be equipped with base 13 and printing apparatus 11 in the 3D printer box 1, be equipped with processing platform 14 on the base 13 and carry out spacing subassembly to processing platform 14, be equipped with the lift part 5 of adjusting the 14 heights of processing platform on the 3D printer box 1, 3D printer box 1 side is equipped with carries out radiating part 4 to its inside, 1 back installation backup pad 6 of 3D printer box, installation vacuum pump 7 on the backup pad 6, be equipped with connecting pipe 8 and honeycomb duct 9 on the vacuum pump 7, be equipped with vacuum valve 10 on the honeycomb duct 9 and communicate inside the 3D printer box 1, 3D printer box 1 openly installs sealing door 2.

In this embodiment, the heat dissipation component 4 includes a water tank 401 fixedly connected to the outer side wall of the 3D printer case 1, a plurality of heat dissipation fins 402 are inserted in the side wall of the water tank 401, a water pump 403 is installed in the water tank 401, a water inlet pipe 404 is installed on the water pump 403, a heat conduction ring 406 is connected to the outer side of the printing head of the printing device 11, a guide plate 410 is installed outside the heat conduction ring 406, a sealing sleeve 405 is sleeved outside the guide plate 410, the water inlet pipe 404 is communicated with the sealing sleeve 405, a water outlet pipe 407 is installed on the sealing sleeve 405, and the other end of the water outlet.

In this embodiment, a support frame 408 is installed on the water tank 401, and a fan 409 is installed on the support frame 408.

In this embodiment, the lifting component 5 includes two supporting blocks 505 installed on the upper surface of the 3D printer box 1, a first rotating shaft 502 is rotatably connected between the two supporting blocks 505, one end of the first rotating shaft 502 is connected to an output shaft of the motor 501, the motor 501 is installed on one of the supporting blocks 505, two ends of the rotating shaft 502 are respectively sleeved with a rotating roller 503, the rotating roller 503 is externally and fixedly connected to one end of a connecting rope 504, and the other end of the connecting rope 504 penetrates into the 3D printer box 1 and is fixedly connected to the base 13.

In this embodiment, the clamping grooves 23 are formed in two sides of the processing table 14, the limiting component includes a two-way screw rod 15 installed in the base 13, a first bevel gear 16 is connected outside the two-way screw rod 15, the inner wall of the base 13 is rotatably connected with a second rotating shaft 17, one end of the second rotating shaft 17 is provided with a second bevel gear 18 meshed with the first bevel gear 16, the other end of the second rotating shaft 17 extends outside the base 13 and is fixedly connected with a rotating block 19, both sides of the two-way screw rod 15 are both in threaded connection with a threaded sleeve 20, one end of the threaded sleeve 20 penetrates through a sliding groove in the base 13 and is fixedly connected with a connecting frame 21, one end of the connecting frame 21 is fixedly connected with a clamping block 22, and the clamping block.

In this embodiment, the sealing door 2 is provided with a handle 3.

The working process and principle are as follows: the working personnel starts the equipment, starts the vacuum pump 7, exhausts the air in the 3D printer box body 1 from the connecting pipe 8 through the guide pipe 9, the motor 501 is started to drive the first rotating shaft 502 to rotate, the rotating roller 503 rotates along with the first rotating shaft 502, then the connecting rope 504 can be wound or descended, the base 13 moves along with the connecting rope 504, the position of the base is adjusted according to the printing of the printing equipment 11, the heat generated by the printing equipment 11 is absorbed by the heat conducting ring 406, then the water pump 403 conveys the water into the sealing sleeve 405 through the water inlet pipe 404, the sealing sleeve 405 flows along the guide plate 410 to absorb the heat on the heat conducting ring 406, then the heat flows back into the heat dissipation part 4 through the water outlet pipe 407 to achieve the effect of heat dissipation of the printing equipment 11, the heat in the water is absorbed by the heat dissipation fins 402, the heat dissipation fins 402 are started to dissipate the heat of the heat dissipation fins 402, then the, carry out circulation heat dissipation, open sealing door 2 after printing, take away the finished product, when needing to change and clearance to processing platform 14, it moves to rotate the link 21 that the second bevel gear 18 that changes on the second 17 of pivot is driven to the commentaries on classics piece 19 and rotate on the swivel nut 20, fixture block 22 moves to both sides along with link 21, make link 21 break away from draw-in groove 23, can take processing platform 14 away, the clearance or change and maintenance back, place again on processing platform 14, reverse commentaries on classics piece 19, fixture block 22 moves to the centre along with link 21, fixture block 22 blocks processing platform 14 through draw-in groove 23 can.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. The utility model provides a 3D printing device of adjustable atmospheric pressure, its characterized in that, includes 3D printer box (1), be equipped with base (13) and printing apparatus (11) in 3D printer box (1), be equipped with processing platform (14) and carry out spacing subassembly to processing platform (14) on base (13), be equipped with lifting means (5) of adjusting processing platform (14) height on 3D printer box (1), 3D printer box (1) side is equipped with carries out radiating part (4) to its inside, 3D printer box (1) back mounted backup pad (6), install vacuum pump (7) on backup pad (6), be equipped with connecting pipe (8) and honeycomb duct (9) on vacuum pump (7), be equipped with vacuum valve (10) and communicate the inside of 3D printer box (1) on honeycomb duct (9), and a sealing door (2) is arranged on the front surface of the 3D printer box body (1).

2. An adjustable air pressure 3D printing device according to claim 1, characterized in that: the heat dissipation component (4) comprises a water tank (401) fixedly connected to the outer side wall of a 3D printer box body (1), a plurality of heat dissipation fins (402) are inserted into the side wall of the water tank (401), a water pump (403) and a water inlet pipe (404) are arranged in the water tank (401), the outer side of a printing head of the printing equipment (11) is connected with a heat conduction ring (406), a guide plate (410) is arranged outside the heat conduction ring (406), a sealing sleeve (405) is sleeved outside the guide plate (410), the water inlet pipe (404) is communicated with the sealing sleeve (405), a water outlet pipe (407) is arranged on the sealing sleeve (405), and the other end of the water outlet pipe (407) is communicated into the water tank (401.

3. An adjustable air pressure 3D printing device according to claim 2, characterized in that: a support frame (408) is installed on the water tank (401), and a fan (409) is installed on the support frame (408).

4. An adjustable air pressure 3D printing device according to claim 1, characterized in that: the lifting component (5) comprises two supporting blocks (505) arranged on the upper surface of the 3D printer box body (1), a first rotating shaft (502) is rotatably connected between the two supporting blocks (505), one end of the first rotating shaft (502) is connected with an output shaft of the motor (501), the motor (501) is arranged on one supporting block (505), two ends of the rotating shaft (502) are respectively sleeved with a rotating roller (503), the rotating roller (503) is externally and fixedly connected with one end of a connecting rope (504), and the other end of the connecting rope (504) penetrates into the 3D printer box body (1) and is fixedly connected with the base (13).

5. An adjustable air pressure 3D printing device according to claim 1, characterized in that: clamping grooves (23) are formed in two sides of the machining table (14), the limiting assembly comprises a two-way screw rod (15) installed in a base (13), a first bevel gear (16) is connected to the outside of the two-way screw rod (15), a second rotating shaft (17) is connected to the inner wall of the base (13) in a rotating mode, a second bevel gear (18) meshed with the first bevel gear (16) is arranged at one end of the second rotating shaft (17), the other end of the second rotating shaft (17) extends to the outside of the base (13) and is fixedly connected with a rotating block (19), threaded sleeves (20) are connected to two sides of the two-way screw rod (15) in a threaded mode, one end of each threaded sleeve (20) penetrates through a sliding groove in the base (13) and is fixedly connected with a connecting frame (21), a clamping block (22) is fixedly connected to one end of the connecting frame.

6. An adjustable air pressure 3D printing device according to claim 1, characterized in that: and a handle (3) is arranged on the sealing door (2).