CN202498764U - Polytetrafluoroethylene isostatic pressure molding device - Google Patents
Polytetrafluoroethylene isostatic pressure molding device Download PDFInfo
- Publication number
- CN202498764U CN202498764U CN2012201072198U CN201220107219U CN202498764U CN 202498764 U CN202498764 U CN 202498764U CN 2012201072198 U CN2012201072198 U CN 2012201072198U CN 201220107219 U CN201220107219 U CN 201220107219U CN 202498764 U CN202498764 U CN 202498764U
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- polytetrafluoroethylene
- tubulose
- sealing ring
- mold
- external mold
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Abstract
The utility model discloses a lining molding device used on chemical equipment and a lining method, and provides a polytetrafluoroethylene isostatic pressure molding device and a lining method. The polytetrafluoroethylene isostatic pressure molding device is smart in conception and fine in performance, a pipe molded by the aid of the polytetrafluoroethylene isostatic pressure molding device is high in strength, and the polytetrafluoroethylene pipe can be tightly lined in a pipeline by the aid of the lining method, and the technical problems of low polytetrafluoroethylene lining density, poor tensile strength and permeation resistance and the like due to insufficient molding pressure of an existing polytetrafluoroethylene molded pipe of the prior art are solved. The method includes integrally placing a mold below the liquid level of a high-pressure cabin of an isostatic pressure machine; pressurizing the high-pressure cabin to process pressure and leading a polytetrafluoroethylene blank to be in cold press molding; adopting an isostatic pressure process; sintering a blank part released from the mold, drawing down the blank part, and placing the blank part into the pipeline; realizing memory rebounding of a polytetrafluoroethylene pipe blank after heating; and leading the polytetrafluoroethylene pipe lining to be lined in the pipeline. The lining is fine in high-temperature resistance and high-pressure resistance, and full-vacuum service requirements under the condition with high temperature of 232 DEG C are met.
Description
Technical field
The utility model relates to a kind of lining shaped device that is used on the chemical industry equipment, and it is simple to relate in particular to a kind of moulding, and intensity is high, the polytetrafluoroethylene (PTFE) isostatic compaction device of dependable performance.
Background technology
Development along with chemical industry; Demand to the lining pipeline is also increasing, because polytetrafluoroethylene (PTFE) has characteristics such as good high-and low-temperature resistance, anticorrosive, weather, so inner liner polytetrafluoroethylene is more popular; Especially in projects such as organosilicon, aniline; Existing lining teflon pipeline generally all employing wait compression technology, promptly in manufacturing process with the part of pipeline box hat itself as lining mold, the operation pressure in the time of can't bearing molded polytetrafluoroethylarticle owing to the pipeline box hat; The 40% o'clock pipeline box hat that reaches moulding process pressure at pressure just begins the distortion leakage; Therefore adopt above-mentioned when waiting compression technology often because of the deficiency of briquetting pressure, make the polytetrafluoroethyllining lining behind the sintering exist density not enough, tensile strength is poor; Problems such as anti-permeability performance difference in use show as: the adpting flange face was prone to break when inside liner cracking, variations in temperature were big when serviceability temperature surpasses 120 °, chemical mediator permeates failure phenomenons such as drum has taken place in the backsight.
Chinese patent discloses a kind of special-shaped polytetrafluoroethylene (PTFE) copper-clad plate mould (CN202029483U); It is made up of upper die and lower die, upper molded plate, framed and mold cavity; Patrix is connected with upper molded plate, counterdie be positioned at patrix under, framed is the hollow frame structure in middle part; Upper die and lower die be positioned over framed in; Patrix and counterdie are accomplished the demoulding according to the external pressure device, and the gap forms mold cavity between the lower end of patrix and the upper end of counterdie, and the copper-clad plate shape of the shape of mold cavity and processing is suitable.This mould is through between upper and lower mould, forming mold cavity; And pass through the external pressure device with the extrusion modling of polytetrafluoroethylene (PTFE) powder; Though the operation pressure in the time of can improving molded polytetrafluoroethylarticle; Thereby satisfy the requirement of the aspects such as density, tensile strength, anti-permeability performance of molded polytetrafluoroethylarticle plate, but this device only is applicable to the processing and forming of tabular polytetrafluoroethylene (PTFE), can't carries out lining of pipe line processing.
Summary of the invention
The utility model has mainly provided a kind of being skillfully constructed; The polytetrafluoroethylene (PTFE) isostatic compaction device that moulding pipe intensity is high, performance is good; Having solved the molded polytetrafluoroethylarticle pipe that exists in the prior art causes polytetrafluoroethyllining lining density low because of briquetting pressure is not enough; Tensile strength is poor, technical problems such as anti-permeability performance difference.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals: a kind of polytetrafluoroethylene (PTFE) isostatic compaction device; Comprise the tubulose internal mold and be sleeved on the outer tubulose external mold of tubulose internal mold; On the inwall of tubulose external mold, be provided with layers of elastomeric film; The outside at tubulose internal mold two ends is respectively equipped with upper sealing ring and lower sealing ring; The outer ring surface of upper sealing ring and lower sealing ring is connected on the layers of elastomeric film respectively, and layers of elastomeric film, upper sealing ring, lower sealing ring and tubulose internal mold surround jointly and form the ring packing chamber, on the tubulose external mold corresponding with the ring packing chamber, is provided with several through holes.Polytetrafluoroethylene (PTFE) belongs to a kind of in the fluoroplastics, because polytetrafluoroethylene (PTFE) can be through cold moudling, the blank after the moulding carries out heat-agglomerating and promptly can be made into finished product; For the fluoroplastics of other hot-forming kind, characteristics such as it is good that the polytetrafluoroethylene (PTFE) after the moulding has quality, and moulding is simple; Earlier polytetrafluorethylepowder powder is inserted under the liquid level in the hyperbaric chamber that is positioned over isostatic pressing machine behind the ring packing chamber again during use, again hyperbaric chamber is pressurizeed, owing to have a lot of through holes on the tubulose external mold; Hydraulic pressure passes through hole and acts on the layers of elastomeric film, layers of elastomeric film stress deformation and inwardly extruding, and layers of elastomeric film acts on pressure on the polytetrafluorethylepowder powder in the ring packing chamber again and keep-ups pressure constant basically; Getting final product after pressurize a period of time under this pressure; Make the pipe of polytetrafluoroethylene (PTFE) material satisfy the requirement of technological forming pressure, simultaneously since in the tubulose hydraulic pressure of mold cavity identical with pressure on acting on layers of elastomeric film, hydraulic pressure passes the inwall that acts on the tubulose external mold behind the through hole simultaneously; It is the internal and external pressure balance of tubulose internal mold and tubulose external mold; Therefore tubulose internal mold and tubulose external mold can both not guarantee the quality of pipe because of the excessive deformed damaged of pressure in forming process, guarantee that again shaped device is not damaged; After pressurize is accomplished the isostatic pressing machine hyperbaric chamber is carried out pressure release and open the cylinder demoulding; Promptly obtained the polytetrafluoroethylene (PTFE) pipe of composite demand, pipe passes through the sintering of sintering circuit again, has promptly accomplished the making of pipe.Shaped device has utilized the principle of inside and outside hydraulic balance cleverly; Be skillfully constructed; Moulding pipe intensity is high, quality is good; Well solved the molded polytetrafluoroethylarticle pipe that exists in the prior art and caused polytetrafluoroethyllining lining pipe density low because of briquetting pressure is not enough, tensile strength is poor, technical problems such as anti-permeability performance difference.
Layers of elastomeric film can be other materials such as silica gel, and as preferably, said layers of elastomeric film is the rubber tube that is flattened on the circle on the tubulose external mold inwall.The rubber tube low price, good springiness.
As preferably; After stretching out, the outer face of said upper sealing ring is horizontally fixed on the upper surface of tubulose external mold; Butt has annular pressing plate on the outer face of lower sealing ring; Annular pressing plate is horizontally fixed on the lower surface of tubulose external mold, and the inner ring surface of annular pressing plate is connected on the tubulose internal mold through sealing ring sealing, and the two ends of layers of elastomeric film are folded in respectively between the end face of upper sealing ring and tubulose external mold and reach between the end face of annular pressing plate and tubulose external mold.Upper sealing ring is fixed on the upper surface of tubulose external mold, lower sealing ring is fixed on the lower surface of tubulose external mold through annular pressing plate, prevents tubulose internal mold radial-play, guarantees base thickness of pipe wall uniformity.
As more preferably; Be respectively equipped with locating flange and following locating flange at the two ends of said tubulose internal mold; The port of last locating flange extends in the tubulose internal mold and is horizontally fixed on the upper sealing ring, and the port of following locating flange extends in the tubulose internal mold and is horizontally fixed on the annular pressing plate.Upper and lower locating flange prevents tubulose internal mold axial float, improves the security reliability of device.
As preferably, said through hole is uniformly distributed with on the outer ring surface of tubulose external mold, and the drift diameter area of through hole accounts for 40% to 60% of tubulose external mold outer ring surface area.Reasonably through hole distributes and sectional area can provide enough uniform pressure with the inside crimp of polytetrafluorethylepowder powder, and further impels layers of elastomeric film to separate the back with tubulose external mold inwall and realize monolithic extruded.
Therefore, the polytetrafluoroethylene (PTFE) isostatic compaction device of the utility model has following advantage: utilize the principle of hydraulic balance, under the intact situation of shaped device; Improved the product quality of base pipe; Make the polyfluortetraethylene pipe density after colding pressing high, tensile strength is big, and permeability resistance is strong; Apparatus structure is simple, is skillfully constructed.
Description of drawings:
Fig. 1 is the structural representation of the polytetrafluoroethylene (PTFE) isostatic compaction device of the utility model;
Fig. 2 is the structural representation that hyperbaric chamber carries out cold moudling of putting into shown in Figure 1.
The specific embodiment:
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.
Embodiment:
As shown in Figure 1; A kind of polytetrafluoroethylene (PTFE) isostatic compaction device of the utility model; Comprise tubulose internal mold 1 and be sleeved on the tubulose external mold 2 outside the tubulose internal mold 1; The two ends of tubulose external mold 2 are outside horizontal-extending respectively; In the inner chamber of tubulose external mold 2, the peg graft layers of elastomeric film 6 of an isodiametric tubulose, layers of elastomeric film 6 are processed and are flattened on the internal face of tubulose external mold 2 by elastomeric material and both ends horizontal extends on tubulose external mold 2 end faces, at upper sealing ring 3 of outside suit of tubulose internal mold 1 upper end, lower sealing ring 4 of outside suit of lower end; The inner ring surface of upper sealing ring 3 and lower sealing ring 4 is sealedly connected on the tubulose internal mold 1; Outer ring surface is connected to respectively on the layers of elastomeric film 6, and layers of elastomeric film 6 is clamped between upper sealing ring 3 and tubulose external mold 2 and lower sealing ring 4 and the tubulose external mold 2, thereby layers of elastomeric film 6, upper sealing ring 3, lower sealing ring 4 and tubulose internal mold 1 surround ring packing chamber 5 of formation jointly; On the tubulose external mold 2 corresponding, evenly have several through holes 21, and the drift diameter area of through hole 21 accounts for 50% of tubulose external mold 2 outer ring surface areas with ring packing chamber 5.After stretching out, the outer face of upper sealing ring 3 wherein is horizontally fixed on the upper surface of tubulose external mold 2 through screw; Annular pressing plate 7 of horizontal butt on the outer face of lower sealing ring 4; Annular pressing plate 7 is fixed on the lower surface of tubulose external mold 2 through screw; And the inner ring surface of annular pressing plate 7 is sealedly connected on the tubulose internal mold 1 through sealing ring 8, and the two ends of layers of elastomeric film 6 clamping are respectively reaching between the end face of annular pressing plate 7 and tubulose external mold 2 between the end face of upper sealing ring 3 and tubulose external mold 2.In the mesopore at tubulose internal mold 1 two ends, peg graft respectively locating flange 9 and following locating flange 10 on one; The installed surface of last locating flange 9 is horizontally fixed on the upper sealing ring 3 through screw, and the installed surface of following locating flange 10 is horizontally fixed on the annular pressing plate 7 through screw.
During use, as shown in Figure 2, comprise following sequential steps:
1) assembles the polytetrafluoroethylene (PTFE) isostatic compaction device, and the polytetrafluoroethylene (PTFE) powder is filled in the ring packing chamber 5;
2) again polytetrafluoroethylene (PTFE) isostatic compaction device integral body is positioned in the hyperbaric chamber of isostatic pressing machine, and in hyperbaric chamber fills with water;
3) hyperbaric chamber was forced into setting value 30MPa and pressurize 10 minutes, making the polytetrafluoroethylene (PTFE) powder cold moudlings in the ring packing chamber 5 is pipe;
4) open and take out the polytetrafluoroethylene (PTFE) isostatic compaction device behind the hyperbaric chamber, and take out pipe, and the external diameter of the pipe after the moulding is bigger by 3% than the internal diameter of lining pipeline;
5) pipe is carried out sintering;
6) usefulness mouthful mould to setting value, even the gap of pipe and lining pipeline is 1.5 mm, and is inserted the pipe drawing-down in the lining pipeline with pipe;
7) heating pipe, tube blank size is adjacent in the lining pipeline after recovering;
8) hot flange is carried out at the pipe two ends;
9) carry out six checks greatly:
High-temperature circulation test: tested 3 hours and repeated 3 times for 250 ℃; Low temperature aging test: the cooling sample is to-18 ℃ and keep being warming up to 16 ℃ again after 48 hours; Steam and cooling water cyclic test: steam pressure drains steam and feeds cooling water circulation 100 times after reaching 862KPa; High-temperature vacuum test: 232 ℃ of vacuum do not have the bubbling phenomenon of caving in; Withstand voltage test; Anti-static test.
Specific embodiment described herein only is that the design to the utility model illustrates.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Claims (6)
1. polytetrafluoroethylene (PTFE) isostatic compaction device; It is characterized in that: comprise tubulose internal mold (1) and be sleeved on the outer tubulose external mold (2) of tubulose internal mold (1); On the inwall of tubulose external mold (2), be provided with layers of elastomeric film (6); Be respectively equipped with upper sealing ring (3) and lower sealing ring (4) in the outside at tubulose internal mold (1) two ends; The outer ring surface of upper sealing ring (3) and lower sealing ring (4) is connected to respectively on the layers of elastomeric film (6); And layers of elastomeric film (6), upper sealing ring (3), lower sealing ring (4) and tubulose internal mold (1) surround jointly and form ring packing chamber (5), on the tubulose external mold (2) corresponding with ring packing chamber (5), are provided with several through holes (21).
2. polytetrafluoroethylene (PTFE) isostatic compaction device according to claim 1 is characterized in that: said layers of elastomeric film (6) is for being flattened on the rubber tube of the circle on tubulose external mold (2) inwall.
3. polytetrafluoroethylene (PTFE) isostatic compaction device according to claim 1 and 2; It is characterized in that: be horizontally fixed on the upper surface of tubulose external mold (2) after the outer face of said upper sealing ring (3) stretches out; Butt has annular pressing plate (7) on the outer face of lower sealing ring (4); Annular pressing plate (7) is horizontally fixed on the lower surface of tubulose external mold (2); And the inner ring surface of annular pressing plate (7) is connected on the tubulose internal mold (1) through sealing ring (8) sealing, and the two ends of layers of elastomeric film (6) are folded in respectively between the end face of upper sealing ring (3) and tubulose external mold (2) and reach between the end face of annular pressing plate (7) and tubulose external mold (2).
4. polytetrafluoroethylene (PTFE) isostatic compaction device according to claim 3; It is characterized in that: be respectively equipped with locating flange (9) and following locating flange (10) at the two ends of said tubulose internal mold (1); The port of last locating flange (9) extends in the tubulose internal mold (1) and is horizontally fixed on the upper sealing ring (3), and the port of following locating flange (10) extends in the tubulose internal mold (1) and is horizontally fixed on the annular pressing plate (7).
5. polytetrafluoroethylene (PTFE) isostatic compaction device according to claim 1 and 2; It is characterized in that: said through hole (21) is uniformly distributed with on the outer ring surface of tubulose external mold (2), and the drift diameter area of through hole (21) accounts for 40% to 60% of tubulose external mold (2) outer ring surface area.
6. polytetrafluoroethylene (PTFE) isostatic compaction device according to claim 4; It is characterized in that: said through hole (21) is uniformly distributed with on the outer ring surface of tubulose external mold (2), and the drift diameter area of through hole (21) accounts for 40% to 60% of tubulose external mold (2) outer ring surface area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201072198U CN202498764U (en) | 2012-03-21 | 2012-03-21 | Polytetrafluoroethylene isostatic pressure molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201072198U CN202498764U (en) | 2012-03-21 | 2012-03-21 | Polytetrafluoroethylene isostatic pressure molding device |
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| CN202498764U true CN202498764U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201072198U Expired - Lifetime CN202498764U (en) | 2012-03-21 | 2012-03-21 | Polytetrafluoroethylene isostatic pressure molding device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632578A (en) * | 2012-03-21 | 2012-08-15 | 东阳市四达氟塑有限公司 | Polytetrafluoroethylene isostatic pressure molding device and pipeline lining method by aid of same |
| CN103072283A (en) * | 2012-12-30 | 2013-05-01 | 南京肯特复合材料有限公司 | Production method for annular magnet embedded hollow PTFE part |
| CN112720793A (en) * | 2021-01-26 | 2021-04-30 | 湖南东方辉陵电气有限公司 | High-voltage electromagnetic isostatic pressing processing assembly |
| CN113021736A (en) * | 2021-03-03 | 2021-06-25 | 绍兴澳能金属有限公司 | Positioning and die pressing mechanism of pipe making machine |
-
2012
- 2012-03-21 CN CN2012201072198U patent/CN202498764U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632578A (en) * | 2012-03-21 | 2012-08-15 | 东阳市四达氟塑有限公司 | Polytetrafluoroethylene isostatic pressure molding device and pipeline lining method by aid of same |
| CN102632578B (en) * | 2012-03-21 | 2014-07-30 | 东阳市四达氟塑有限公司 | Polytetrafluoroethylene isostatic pressure molding device and pipeline lining method by aid of same |
| CN103072283A (en) * | 2012-12-30 | 2013-05-01 | 南京肯特复合材料有限公司 | Production method for annular magnet embedded hollow PTFE part |
| CN112720793A (en) * | 2021-01-26 | 2021-04-30 | 湖南东方辉陵电气有限公司 | High-voltage electromagnetic isostatic pressing processing assembly |
| CN113021736A (en) * | 2021-03-03 | 2021-06-25 | 绍兴澳能金属有限公司 | Positioning and die pressing mechanism of pipe making machine |
| CN113021736B (en) * | 2021-03-03 | 2022-08-30 | 绍兴澳能金属有限公司 | Positioning and die pressing mechanism of pipe making machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SIDA FLUORINE PLASTIC CO., LTD. Free format text: FORMER NAME: DONGYANG SIDA FLUOROPLASTIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 322118 Zhejiang city of Jinhua province Dongyang city Hengdian Town Lake Patentee after: Four Tatsu fluorine plastic Limited by Share Ltd Address before: 322118 Zhejiang city of Jinhua province Dongyang city Hengdian Town Lake Patentee before: Dongyang Sida Fluorine Plastic Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Befar Group Co.,Ltd. Assignor: Four Tatsu fluorine plastic Limited by Share Ltd Contract record no.: 2017330000072 Denomination of utility model: Polytetrafluoroethylene isostatic pressure molding device and pipeline lining method by aid of same Granted publication date: 20121024 License type: Common License Record date: 20170527 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |