TWI762213B - Fluororesin storage tank and manufacturing method thereof - Google Patents

Abstract

The present invention provides a fluororesin storage tank and manufacturing method thereof, comprising a tank and a liner which is made from a fluorineresin material. The liner is attached to an inner wall of the tank, and the steps include: arranging glue on the inner wall of the tank; using an air pressure to make the liner attach to the inner wall of the tank, and form a space between each other; applying a vacuum to completely expel the air in the space, and the liner is pressed against the inner wall; giving a temperature to an outer wall of the tank to melt the glue on the inner wall by a heating conduction, and the liner is adhered to the inner wall of the tank.

Description

Fluorine resin clean barrel and manufacturing method thereof

A liquid storage clean barrel, particularly a fluororesin clean barrel and a manufacturing method thereof.

The conventional monofluororesin has the characteristics of anti-sticking, chemical resistance, heat resistance, excellent surface smoothness with low friction coefficient and UV resistance, which makes the fluororesin very suitable for use in the electronics industry, semiconductor industry and even In the chemical industry, such as chemical liquid delivery pipes, filters and heat exchangers, the fluororesin is often used as a clean barrel lining material for containing high-purity or medical-grade chemicals, so that the Clean barrels can exhibit excellent corrosion resistance and anti-sticking properties.

In the prior art, a welding melting point of the fluororesin is very different from that of other rigid materials, so that the fluororesin is not easy to be welded and formed with other materials, so that a lining made of the fluororesin is often used in the manufacture of the clean barrel. It is necessary to adhere the lining to the inner wall of the clean bucket by means of traditional manual lamination, and use a push rod to push and rub on the surface of the lining to remove the lining and the inner wall of the clean bucket. air between, and make the lining and the inner wall of the clean barrel fit more closely.

However, the above-mentioned process of using the push rod to push the bonding on the surface of the inner lining often causes scratches on the surface of the inner lining, which greatly damages the smoothness of the surface of the inner lining, resulting in residues of the chemical agent during use. Because of the need for manual operation during manufacturing, it not only consumes man-hours and manpower, but also has the possibility of causing pollution.

In addition, the clean barrel includes at least one nozzle, so that the chemical can enter and exit through the nozzle. In order to maintain the overall cleanliness of the chemical during circulation and to avoid the nozzle being easily corroded by the chemical, the inside of the transmission position When the wall is manufactured, it also includes a hole lining. The hole lining is mostly squeezed into the transmission position by means of a hose, and the hole is made by cutting, local heating, softening and turning over. The liner can conform to the opening of the open end of the transfer position and be joined to the liner by welding.

However, the hole lining will generate stress due to extrusion and the above-mentioned manufacturing steps. Under long-term use, the hole lining is often peeled off due to cracking and welding, so that the inner wall of the clean barrel corrodes and directly contacts the chemical agent. The source of pollution has greatly affected the service life of the clean barrel.

In order to invent a liquid storage clean barrel that can not only reduce man-hours, labor costs and pollution during manufacture, but also prolong the service life in the future, the present invention provides a fluororesin clean barrel and a manufacturing method thereof, the steps of which include: A sufficient amount of a hot glue is arranged on an inner wall of a shell; a lining made of a fluororesin material is pressed against the inner wall and the hot glue; it is applied between the lining and the inner wall When a vacuum is drawn, the air between the inner liner and the inner wall is discharged, and the inner liner is pressed against the inner wall; a high temperature is given to an outer wall of the shell, and through heat conduction, the hot glue on the inner wall is made Soften and the liner fits snugly against the inner wall.

Wherein, the outer wall is provided with a hollow tubular nozzle structure, the nozzle structure is a hollow tubular shape, and communicates with a storage space in the fluororesin clean barrel, the nozzle structure includes an inner wall of a tube and a nozzle attached to the inner wall of the tube. A pipe liner, the steps of which include: using tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer to make the pipe liner through injection integral molding; One end of the pipe liner is inserted into the nozzle structure and penetrates deep into the storage space, the outer wall of the pipe liner is slidably attached to the pipe inner wall; and one end of the pipe liner uses a welding technology , so that it is welded and fixed with the lining.

Wherein, a welding rod made of tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer is wrapped around one end outer wall of the inner lining of the pipe and between the inner lining, and is welded and fixed by the welding technology.

Further, the lining material can be selected from tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, polytetrafluoroethylene or modified polytetrafluoroethylene.

Further, the pipe liner comprises a pipe structure and a ring structure, one end of the pipe structure radially extends to form the ring structure, the pipe liner is inserted into the nozzle structure in the direction of the end of the pipe structure, the The ring structure is left outside the nozzle structure and is in contact with the nozzle surface of the nozzle structure.

Further, the nozzle structure is a manhole.

Further, the nozzle structure is an interface for connecting pipelines.

After the inner liner made of polytetrafluoroethylene of the present invention is bonded by the above-mentioned manufacturing method, the surface roughness of the inner liner can be lower than 0.30 microns; and the tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer has a The surface roughness of the liner can then be less than 0.05 microns.

A fluororesin clean barrel and its manufacturing method provided by the present invention can achieve the following advantages:

1. The pipe lining is made by integral molding to avoid the risk of residual stress and rupture of the pipe lining due to the extrusion of the hose, cutting, local heating and softening and turning over, so as to prolong the service life.

2. Since the inner lining of the tube and the electrode are made of the same material, the fusion of welding is improved and the risk of peeling off at the welding point is reduced, so that the stability of the fluororesin clean barrel in future use is improved.

3. Use the air pressure and the vacuum to make the lining abut the inner wall and completely discharge the air between the two, reduce the chance of work on the surface of the lining, and greatly reduce the scratches on the surface of the lining. marks and the chance of contamination.

4. Compared with the traditional manpower and a push rod to push and fit on the surface of the lining, using the air pressure and the vacuuming principle can not only reduce time and labor costs, but also ensure that the lining is uniformly stressed And the inner wall is attached to achieve better bonding strength.

10: Shell

11: inner wall

12: outer wall

20: Lining

30: Nozzle structure

31: The inner wall of the tube

32: Pipe lining

321: Tube Structure

322: Ring Structure

33: Connecting pipe

34: Outer ring wall

40: Vacuum device

A: Storage space

B: channel

D: welding rod

Figure 1 is a perspective view of a preferred embodiment of the present invention

FIG. 2 is a partial structural cross-sectional view of the preferred embodiment of the present invention.

Figure 3 is a schematic diagram of a preferred embodiment of the present invention

Please refer to FIG. 1 and FIG. 3 , which are a fluororesin clean bucket and a manufacturing method thereof provided by the present invention, which includes a casing 10 , an inner lining 20 and at least one nozzle structure 30 , and the casing 10 is made of a rigid material Thus, the housing 10 includes an inner wall 11 and an outer wall 12, the inner wall 11 forms a storage space A, and the storage space A can be used to store a liquid. The lining 20 is made of a fluororesin material, preferably, the material of the lining 20 can be selected from tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer (PFA), polytetrafluoroethylene (PTFE) or modified Polytetrafluoroethylene (M-PTFE), wherein one side of the inner liner 20 is attached to the inner wall 11 .

Please refer to FIG. 2 , the nozzle structure 30 is disposed on the outer wall 12 of the housing 10 , the nozzle structure 30 is a hollow tube, and communicates with the storage space A, so that the liquid can pass through the nozzle structure 30 to the fluorine The resin cleaning barrel is discharged into or out, wherein the inner lining 20 is attached to the inner wall 11 before the inner wall 11 corresponds to the position where the nozzle structure 30 is arranged, and there are a plurality of openings perforated. The inside of the hollow tubular nozzle structure 30 can be defined as a channel B, and the channel B communicates with the storage space A. The nozzle structure 30 can be the size of a manhole or an interface such as a pipeline connection.

The nozzle structure 30 includes a tube inner wall 31 and a tube inner liner 32 . The tube inner liner 32 is disposed in the channel B and slidably attached to the tube inner wall 31 . The material of the pipe lining 32 is selected from tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer (PFA), and is made by integral molding. The pipe lining 32 includes a pipe structure 321 and a ring structure 322. The pipe structure One end of the 321 radially extends to form the ring structure 322 .

The pipe liner 32 is inserted into the channel B in the direction of the end of the pipe structure 321, so that the outer wall of the pipe structure 321 can be slidably attached to the pipe inner wall 31, so that the pipe liner 32 can be prevented from being damaged by a hose. Risk of rupture by means of extrusion. The ring structure 322 is placed outside the channel B and is in contact with the nozzle surface of the nozzle structure 30 , wherein the end of the tube structure 321 inserted into the channel B penetrates the opening corresponding to the nozzle structure 30 and goes deep into the storage In the space A, a welding technique is used on the outer side of the end of the tube structure 321, so that it can be welded and fixed with the lining 20 near the opening, so that the fluororesin is not easy to be welded with a rigid material. Preferably, a welding rod D made of tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer (PFA) material is wrapped between the outer wall of the pipe structure 321 and the inner lining 20, and passes through the pipe inner lining 32 and the inner lining 20. The welding rod is made of the same PFA material, which improves the fusion of welding, reduces the risk of peeling at the welding point, and improves the stability of the fluororesin clean barrel in the future.

In this embodiment, when the nozzle structure 30 includes a communication pipe 33 , an outer ring wall 34 and the pipe lining 32 , the communication pipe 33 is tubular and is disposed on the outer wall 12 of the housing 10 , the communication pipe 33 is tubular. The inside of the tube 33 can be defined as the channel B that communicates with the storage space A, the tube inner wall 31 is formed in the communication tube 33, and the outer ring wall 34 radially protrudes from the open end of the communication tube 33, so that the The open end of the nozzle structure 30 is a nozzle whose overall outer diameter is relatively larger than the outer diameter of the communication pipe 33. When the pipe lining 32 is placed in the channel B, the ring structure 322 is left outside the channel B and is connected to the outer ring wall. 34 nozzle surface fit.

Further, when the casing 10 includes a curved surface structure, the inner wall 11 of the casing 10 can be divided into a plurality of parts for bonding. In this embodiment, the casing 10 includes two curved side plates at both ends and A barrel. Prepare the inner lining 20 corresponding to each of the curved side panels and the shape of the barrel, respectively, and Using a fluororesin clean barrel manufacturing method provided by the present invention, each of the inner linings 20 is respectively attached to each of the curved side plates and the inner wall of the barrel, and then each of the curved side plates with the inner liner 20 is attached. And the barrel body is joined by flange or welding to form the fluororesin clean barrel.

The present invention provides a fluororesin clean bucket and a manufacturing method thereof. The steps include: after confirming that the inner wall 11 and the inner lining 20 are clean, a sufficient amount of hot glue is placed on the inner wall; The inner lining 20 made of fluororesin material is close to the inner wall 11 and the hot glue; a vacuum is applied between the inner lining 20 and the inner wall 11 through a vacuum device 40, so that the inner lining 20 is evacuated. And the air in the inner wall 11 is completely exhausted, the inner lining 20 is pressed against the inner wall 11; a high temperature is given to the outer wall 12, and through heat conduction, the hot glue on the inner wall 11 is softened to achieve the effect of high viscosity, At this time, the inner lining 20 is closely attached to the inner wall 11 .

Through the air pressure and the principle of evacuation, the inner liner 20 achieves the effect of abutting against the inner wall 11 and exhausting air, reducing the chance of the whole process operating on the surface of the inner liner 20, and reducing the surface of the inner liner 20 due to manual operations. The probability of scratches and contamination is generated, and due to the vacuuming technology, the lining 20 can be uniformly stressed and attached to the surface of the inner wall 11 . It is worth noting that, after the inner liner 20 made of PTFE is bonded by the manufacturing method of the present invention, the surface roughness of the inner liner 20 can be lower than 0.30 micrometers (um); The surface roughness of the inner liner 20 of the perfluoroalkyl vinyl ether copolymer may be lower than 0.05 micrometer (um).

A fluororesin clean barrel and its manufacturing method provided by the present invention can achieve the following advantages:

1. The pipe lining 32 of the nozzle structure 30 is made by integral molding and injection, so as to avoid stress residual and rupture of the pipe lining 32 due to the extrusion of the hose, cutting, local heating and softening and turning over. risk and prolong the service life.

2. Since the pipe lining 32 and the electrode D are made of the same PFA material, the fusion of welding is improved and the risk of peeling off at the weld is reduced, so that the stability of the fluororesin clean barrel in future use is improved.

3. Use the air pressure and the vacuum to make the lining 20 abut against the inner wall 11 and completely discharge the air between the two, reduce the chance of work on the surface of the lining 20, and greatly reduce the lining 20 Chances of scratches and contamination on the surface.

4. Compared with the traditional manpower and a push rod to push and fit on the surface of the lining, using the air pressure and the vacuuming principle can not only reduce time and labor costs, but also ensure that the lining 20 is evenly affected. force and adhere to the inner wall 11 to achieve better bonding strength.

10: Shell

12: outer wall

20: Lining

30: Nozzle structure

A: Storage space

Claims (7)

A method for manufacturing a fluororesin clean barrel, the steps comprising: disposing a sufficient amount of a hot glue on an inner wall of a shell; abutting an inner lining made of a fluororesin material against the inner wall and the heat Adhesive; give a vacuum between the lining and the inner wall, so that the air between the lining and the inner wall is discharged, and the lining presses the inner wall; give an outer wall of the shell a High temperature, through heat conduction, so that the hot glue of the inner wall is softened and the inner lining is closely attached to the inner wall, wherein: the outer wall is provided with a hollow tubular nozzle structure, and the nozzle structure is connected to the fluororesin clean barrel. a storage space, the nozzle structure includes a tube inner wall and a tube liner attached to the tube inner wall, and the steps include: using tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer to inject the tube liner through One end of the pipe liner is placed into the nozzle structure and penetrates deep into the storage space, and the outer wall of the pipe liner is slidably attached to the pipe inner wall; and one of the pipe liner The end is welded to the liner using a welding technique. According to the manufacturing method of the fluororesin clean barrel as claimed in claim 1, a welding rod made of tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer is used to coat one end outer wall of the inner lining of the pipe and the outer wall of the inner lining. and fixed by welding using this welding technique. A fluororesin clean barrel made by the method of claim 1 or 2. According to the fluororesin clean barrel according to claim 3, the lining material can be selected from tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, polytetrafluoroethylene or modified polytetrafluoroethylene. The fluororesin clean barrel according to claim 4, wherein the pipe lining comprises a pipe structure and a ring structure, one end of the pipe structure radially extends to form the ring structure, and the pipe lining is formed with the ring structure. The end direction of the pipe structure is inserted into the nozzle structure, and the ring structure is left outside the nozzle structure and is in contact with the nozzle surface of the nozzle structure. According to the fluororesin clean barrel according to claim 5, the nozzle structure is a manhole. According to the fluororesin clean barrel according to claim 6, the nozzle structure is an interface for connecting pipelines.

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