CN211683499U

CN211683499U - Novel 3D printer with active cooling function

Info

Publication number: CN211683499U
Application number: CN201921923926.2U
Authority: CN
Inventors: 招銮; 何德生
Original assignee: Shanghai Yingpu Three Dimensional Printing Technology Co ltd
Current assignee: Shanghai Yingpu Three Dimensional Printing Technology Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-10-16
Anticipated expiration: 2029-11-06

Abstract

The utility model discloses a novel 3D printer with active cooling function, its technical scheme's main points are including quick-witted case, are equipped with the heat preservation storehouse in the quick-witted case, are equipped with the high temperature storehouse in the top in heat preservation storehouse, still are equipped with nitrogen generator at quick-witted incasement be equipped with on the nitrogen generator and lead to the cooling trachea in high temperature storehouse is equipped with the admission valve on the heat preservation storehouse, is equipped with the intake pipe that leads to the heat preservation storehouse on the high temperature storehouse, the intake pipe lets in and is used for refrigerated gas and discharges toward the heat preservation storehouse through the admission valve. The utility model discloses utilize nitrogen gas to get into the high temperature storehouse, then enter into the storehouse that keeps warm through the intake pipe, final nitrogen gas area forming barrel and two storehouse body heats are given removing, can reduce the oxygen content of two storehouse bodies and realize quick cooling simultaneously, and the powder and the 3D of effective prevention forming barrel the inside print the oxidative degradation and the thermal degradation of forming part cooling process.

Description

Novel 3D printer with active cooling function

[ technical field ] A method for producing a semiconductor device

The utility model relates to a novel 3D printer with active cooling function.

[ background of the invention ]

The 3D printer can be realized by various technologies, and the most widely used in the industrialization aspect at present belongs to a laser powder sintering technology SLS. The SLS method adopts an infrared laser as an energy source, and the used molding materials are mostly powder materials. During processing, firstly, the powder is spread under the action of a powder scraping mechanism, and then the high polymer powder is preheated to a specific temperature (for example, the temperature of 170-180 ℃ for crystalline PA12 powder is close to the melting point, and the temperature of 100-140 ℃ for semi-crystalline TPU powder); the laser beam is selectively sintered under the control of a computer according to the information of the layered cross section, the next layer of powder laying, preheating and sintering processes are carried out after one layer is finished, and after all the powder in the forming barrel is completely sintered, the sintered and formed part is separated from the unsintered powder when the temperature of the powder in the forming barrel is reduced to be close to the room temperature, so that the sintered and formed part and the recovered powder are obtained. Because the high polymer powder material is easily subjected to thermal degradation at high temperature for a long time and is subjected to oxygen degradation in an oxygen-containing environment, the recovered powder is usually mixed with new powder in a specific proportion after being filtered and then used for new printing so as to stabilize the quality of 3D printing forming parts.

But current technique is after the part sintering is accomplished, the 3D printer storehouse body, and powder package temperature in the shaping bucket is high, the radiating rate is slow, slow cooling process leads to polymer powder and 3D to print fashioned part and takes place thermal degradation easily, often need to intervene to open the machine and take out the shaping bucket further cooling to the hand after the printer storehouse body reduces the uniform temperature, but in the operation process, operating personnel easily burns, and lead to the powder of shaping bucket the inside and print shaping part contact oxygen easily and take place oxygen degradation, the cyclic utilization rate of reduction powder, use cost is improved, the mechanical properties of reduction part. And if still need artifical intervention on holidays, then need artifical on duty, increased the human cost, inefficiency is unfavorable for continuous automated production.

The present invention is made based on such a situation.

[ Utility model ] content

The utility model aims at overcoming the not enough of prior art, provide one kind and do not need the manual work in time to intervene, have no comdenstion water, the novel 3D printer of initiative cooling function under the nitrogen protection.

The utility model discloses a realize through following technical scheme:

the utility model provides a novel 3D printer with initiative cooling function, its characterized in that is equipped with heat preservation storehouse 2 including quick-witted case 1 in quick-witted case 1, is equipped with high temperature storehouse 3 in the top of heat preservation storehouse 2, still is equipped with nitrogen generator 4 in quick-witted case 1 be equipped with on the nitrogen generator 4 and lead to the cooling trachea 5 in high temperature storehouse 3 is equipped with admission valve 11 on heat preservation storehouse 2, is equipped with the intake pipe 6 that leads to heat preservation storehouse 2 on high temperature storehouse 3, intake pipe 6 lets in the gas that is used for the cooling and discharges toward heat preservation storehouse 2 through admission valve 11.

Novel 3D printer with initiative cooling function as above, its characterized in that: an air outlet pipe 7 and an exhaust valve 8 are arranged on the heat preservation bin 2, and the air outlet pipe 7 exhausts high-temperature gas through the exhaust valve 8.

Novel 3D printer with initiative cooling function as above, its characterized in that: an exhaust fan 9 is arranged on the case 1, the air outlet pipe 7 leads to the exhaust fan 9, and an exhaust pipe 10 which is directly communicated with the upper part of the case 1 is arranged on the exhaust fan 9.

Novel 3D printer with initiative cooling function as above, its characterized in that: the air inlet valve 11 is arranged at the bottom of the heat preservation cabin 2, and the exhaust valve 8 is arranged at the upper part of the heat preservation cabin 2.

Novel 3D printer with initiative cooling function as above, its characterized in that: the number of the air inlet pipes 6 is two, and the air inlet pipes pass through the air inlet valves 11 from two sides of the high-temperature bin 3 to enter the heat preservation bin 2.

Compared with the prior art, the utility model discloses there is following advantage:

1. the utility model discloses utilize nitrogen gas to get into the high temperature storehouse, then enter into the storehouse that keeps warm through the intake pipe, final nitrogen gas area forming barrel and two storehouse body heats are given removing, can reduce the oxygen content of two storehouse bodies and realize quick cooling simultaneously, and the powder and the 3D of effective prevention forming barrel the inside print the oxidative degradation and the thermal degradation of forming part cooling process.

2. The utility model discloses full automatization operation is really realized to whole course of working, does not need the manual work to in time intervene, has reduced manufacturing cost, has improved the degree of automation of 3D printing part. And because the nitrogen making module of the original 3D printer high-temperature bin is utilized, the production cost of the equipment is not obviously increased.

3. The utility model discloses an utilize the nitrogen gas that compressed air through freeze drying and purification treatment made, remove and can accelerate the initiative cooling of printing shaping part and polymer powder in the middle of the shaping bucket in the heat preservation storehouse to the cooling process does not have the comdenstion water and produces, avoids wetting of polymer powder, does benefit to the powder and retrieves.

[ description of the drawings ]

Fig. 1 is a perspective view of the present invention 1;

fig. 2 is a perspective view of the present invention 2.

In the figure: 1 is a case; 2 is a heat preservation bin; 3 is a high temperature bin; 4 is a nitrogen generator; 5 is a cooling air pipe; 6 is an air inlet pipe; 7 is an air outlet pipe; 8 is an exhaust valve; 9 is an exhaust fan; 10 is an exhaust pipe; and 11 is an intake valve.

[ detailed description ] embodiments

The technical features of the present invention will be described in further detail below with reference to the accompanying drawings so that those skilled in the art can understand the technical features.

The following is introduced to the 3D printer, the structure of the 3D printer and the principle thereof are prior art, and reference may be made to the patents previously filed by the applicant, including the following:

1. the patent name is 'a laser powder sintering method of a 3D printer', and the patent number is 201310514029.7.

2. The patent is 'a novel laser powder sintering forming machine with a powder adding function', and the patent number is 201520293000.5.

3. The patent is named as a laser powder sintering forming machine with a liftable barrel bottom, and the patent number is 201520294968.

4. The patent name is preheating bin of laser sintering machine, and the patent number is 201820256798. X.

This patent application protects a novel 3D printer with initiative cooling function, including quick-witted case 1, quick-witted case 1 is made at the frame welding box, the box is not drawn in the picture, be equipped with heat preservation storehouse 2 in quick-witted case 1, be equipped with the shaping bucket in heat preservation storehouse 2, be equipped with high temperature storehouse 3 in heat preservation storehouse 2's top, pass through laser sintering powder at high temperature storehouse 3, and the powder is placed on the fly leaf of shaping bucket, the powder that has sintered descends to heat preservation storehouse along with the fly leaf of shaping bucket gradually, add one deck powder again through adding the powder device and continue the sintering. The specific structure and principle of sintering can be referred to the above patent 1 to patent 4.

The machine case 1 is also internally provided with a nitrogen generator 4, the nitrogen generator 4 is provided with a cooling air pipe 5 leading to the high-temperature chamber 3, the heat preservation chamber 2 is provided with an air inlet valve 11, the high-temperature chamber 3 is provided with an air inlet pipe 6 leading to the heat preservation chamber 2, and the air inlet pipe 6 leads in gas for cooling to the heat preservation chamber 2 through the air inlet valve 11 and discharges the gas.

The nitrogen generator separates oxygen from compressed air to obtain high-purity nitrogen, so that the cooling gas is nitrogen.

Further, be equipped with outlet duct 7 and discharge valve 8 on heat preservation storehouse 2, outlet duct 7 is through discharge valve 8 exhaust high temperature gas, intake pipe 6 be equipped with two, get into heat preservation storehouse 2 from the both sides of high temperature storehouse 3 through same admission valve 11, nitrogen gas in the high temperature storehouse 3 can get into the heat preservation storehouse sooner.

An exhaust fan 9 is arranged on the case 1, the air outlet pipe 7 leads to the exhaust fan 9, and an exhaust pipe 10 which is directly communicated with the upper part of the case 1 is arranged on the exhaust fan 9.

Preferably, the air inlet valve 11 is arranged at the bottom of the heat preservation cabin 2, and the air outlet valve 8 is arranged at the upper part of the heat preservation cabin 2.

The high-temperature bin 3 and the heat preservation bin 2 are not two completely isolated bin bodies, but two regions which are manually divided according to different temperatures. Because there is laser sintering heating in the high temperature storehouse 3, the region that keeps away from the laser in quick-witted incasement portion below belongs to heat preservation storehouse 2, consequently the temperature in heat preservation storehouse 2 is less than the temperature in high temperature storehouse 3. The powder is sintered and formed layer by layer, and the sintered powder layers gradually descend along with the movable plate of the forming barrel and are far away from the laser to enter a region with relatively low temperature, namely the heat preservation bin 2.

The high-temperature bin 3 is filled with nitrogen when the machine starts to work, the high-temperature bin 3 is filled with the nitrogen, and a small amount of nitrogen enters the heat preservation bin 2. Before the powder is completely sintered and molded, the air inlet valve 11, the air outlet valve 8 and the exhaust fan 9 are all closed, so that the heat of the system is not dissipated. The nitrogen of the hot box 2 does not form a gas flow for cooling, and its main function is to protect the material being processed, in particular to prevent the powder from being oxidized.

After the machine finishes sintering the material, when being in the cooling stage, the system can detect the cooling condition of shaping bucket, suitably open admission valve 11 and discharge valve 8, let the nitrogen gas in upper portion high temperature storehouse 3 lead to the storehouse 2 bottom that keeps warm through admission valve 11 of bottom through intake pipe 6, whole high temperature storehouse 3 is full of with the storehouse 2 that keeps warm by nitrogen gas, then open exhaust fan 9 and carry out forced air cooling, nitrogen gas forms a blast stream and takes the heat away, hot-blast discharge valve 8 discharges through, and lead to the blast pipe 10 at top through exhaust fan 9 to high-temperature gas, the process of cooling with higher speed. The cooling process is accelerated as much as possible without deformation of the workpiece inside the forming tub.

Because the nitrogen gas at the upper part is sucked from the bottom of the heat preservation bin 2, the material of the heat preservation bin at the bottom can also play a role in preventing oxidation.

The utility model discloses the nitrogen gas in the heat preservation storehouse 2 comes from high temperature storehouse 3 rather than directly coming from nitrogen generator 4, its design benefit: firstly, nitrogen in the high-temperature bin 3 can be fully utilized, and the nitrogen is saved; secondly, after sintering is finished, cooling of the high-temperature bin 3 can be accelerated, otherwise an air inlet valve, an air outlet valve and an exhaust fan are required to be additionally arranged on the high-temperature bin 3 to cool the high-temperature bin, and the structure is more complex; thirdly, can utilize the nitrogen making module in former 3D printer high temperature storehouse, the manufacturing cost of equipment does not have showing the increase.

The 3D printer has installed additionally the utility model discloses an after the active cooling device, the powder of sintering can be cooled off fast and prevent by the oxidation in heat preservation storehouse 3, and is no longer limited to the hatch door open time in heat preservation storehouse, need not be like current 3D printer again, and the back is accomplished in the sintering, must open the door in heat preservation storehouse at once and carry out natural cooling, has made things convenient for the operation workman greatly.

The embodiment of the utility model is only right the description that the preferred embodiment of the utility model goes on, not to injecing utility model design and scope, not departing from the utility model discloses under the prerequisite of design idea, engineering technical staff is right in the art the technical scheme of the utility model make various variants and improvements, all should fall into the protection scope of the utility model.

Claims

1. The utility model provides a novel 3D printer with initiative cooling function, its characterized in that is equipped with heat preservation storehouse (2) including quick-witted case (1) in quick-witted case (1), is equipped with high temperature storehouse (3) in the top of heat preservation storehouse (2), still is equipped with nitrogen generator (4) in quick-witted case (1) be equipped with on nitrogen generator (4) leading to cooling gas pipe (5) in high temperature storehouse (3) are equipped with admission valve (11) on heat preservation storehouse (2), are equipped with intake pipe (6) leading to heat preservation storehouse (2) on high temperature storehouse (3), intake pipe (6) let in and are used for refrigerated gas and discharge toward heat preservation storehouse (2) through admission valve (11).

2. The novel 3D printer with active cooling function as claimed in claim 1, wherein: an air outlet pipe (7) and an exhaust valve (8) are arranged on the heat preservation bin (2), and the air outlet pipe (7) discharges high-temperature gas through the exhaust valve (8).

3. The novel 3D printer with active cooling function as claimed in claim 2, characterized in that: an exhaust fan (9) is arranged on the case (1), the air outlet pipe (7) leads to the exhaust fan (9), and an exhaust pipe (10) which is directly communicated with the upper part of the case (1) is arranged on the exhaust fan (9).

4. The novel 3D printer with active cooling function as claimed in claim 2, characterized in that: the air inlet valve (11) is arranged at the bottom of the heat preservation cabin (2), and the exhaust valve (8) is arranged at the upper part of the heat preservation cabin (2).

5. The novel 3D printer with active cooling function as claimed in claim 2, characterized in that: the two air inlet pipes (6) are arranged, and enter the heat preservation cabin (2) from two sides of the high-temperature cabin (3) through the air inlet valves (11).