CN103770262A - Ethylene-tetrafluoroethene copolymer rotational moulding technology - Google Patents
Ethylene-tetrafluoroethene copolymer rotational moulding technology Download PDFInfo
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- CN103770262A CN103770262A CN201210398097.7A CN201210398097A CN103770262A CN 103770262 A CN103770262 A CN 103770262A CN 201210398097 A CN201210398097 A CN 201210398097A CN 103770262 A CN103770262 A CN 103770262A
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Abstract
The invention discloses an ethylene-tetrafluoroethene copolymer rotational moulding technology, which relates to an ethylene-tetrafluoroethene copolymer rotational moulding process. ETFE is used as raw material, and the mass of the ethylene-tetrafluoroethene is 70-80% of the mass of the raw material. ETFE raw material is placed in a workpiece, and the workpiece is placed in an electrically heated baking oven for heating, and the workpiece is rotated along two axes at the rotation speed of 15-60 revolution/minute; simultaneously the workpiece and ETFE raw materials are heated, and the ETFE raw material is melted on the surface of the workpiece for forming a layer of compact and improved ETFE inner liner coating; finally, surthe face of branch orifice\pipe orifice of the workpiece is processed by machine. The invention solves the problems that the present ethylene-tetrafluoroethene copolymer rotational moulding technology has high cost, low efficiency, long time consumption, etc.
Description
Technical field
The present invention relates to ethylene-tetrafluoroethylene copolymer rotational molding technique method.
Background technology
ETFE (ethylene-tetrafluoroethylene copolymer) rolls lining coating technology and refers to and in the workpiece of a sealing, put into a certain amount of ETFE raw material, this workpiece is placed in the baking oven of diesel heating, Artificial Control pivots workpiece, and heated parts and ETFE raw material form the ETFE lining coating of one deck densification in surface of the work fusing simultaneously.This technology is developed in conjunction with the rotational forming process technology of Japan AGC Co., Ltd. by the fluoroplastics paint-on technique of Ao Simeng company of the U.S..
The shortcoming of traditional E TFE rotational molding technique is Artificial Control, less stable, and uncontrollable factor causes uncertainty larger.In addition, traditional handicraft is used the mode of diesel heating, easily causes environmental pollution.And owing to cannot guaranteeing abundant thawing and the one-shot forming of ETFE raw material the Artificial Control heating-up temperature in the situation that, easily produce bubble.In addition in traditional handicraft, process and use the mode of artificial planing surface processing also to have very large defect for a sealing surface for mouthful mouth of pipe, easily produce sealing surface out-of-flatness and cause mouthful the mouth of pipe cannot with other connecting pipes mouthful the complete combination of the mouth of pipe, cause Korrosionsmedium to leak.
Summary of the invention
The invention provides a kind of ethylene-tetrafluoroethylene copolymer rotational molding technique, the cost that the invention solves existing ethylene-tetrafluoroethylene copolymer rotational molding technique existence is high, at the bottom of efficiency, and the problems such as time-consuming length.
For addressing the above problem, the present invention adopts following technical scheme: ethylene-tetrafluoroethylene copolymer rotational molding technique, and take ETFE as raw material, in raw material, the mass content of ethylene-tetrafluoroethylene is 70-80%; In workpiece, put into ETFE raw material, this workpiece is placed in electrically heated baking oven, in baking oven and heat, and make workpiece do diaxon rotation, rotary speed is 15-60 rev/min, heated parts and ETFE raw material form the improvement ETFE lining coating of one deck densification in surface of the work fusing simultaneously, a last mouthful mouth of pipe surface by machining workpiece.
ETFE is that raw material adopts electrical heating method, ETFE is heated to 120-250 ℃ and improves.
In baking oven, heating-up temperature is 120--250 ℃.
Heat and improve after ethylene-tetrafluoroethylene copolymer (F40), tetrafluoroethene content is wherein in 3/4ths left and right (by weight), therefore it has kept the resistance to chemical corrosion that polytetrafluoroethylene (PTFE) is good, also have good heat-resisting simultaneously, wear-resisting, radiation hardness and shock-resistant and electrical insulation capability.Its tensile strength can be that the twice of polyflon is many.Due to its good performance, be particularly suitable for ETFE rotational moulding processing, than having increased by 15% with the adhesive force of steel in traditional E TFE rotational molding technique, make equipment can really can bear negative pressure.Ethylene-tetrafluoroethylene copolymer F40 after improvement more strengthens by glass fibre, has further improved its impact strength, creep resistant, rigidity and dimensional stability.
Simultaneously, ETFE rotational molding technique after improvement uses computerized control automatically, increase the stability of this technique, make to the full extent ETFE raw material fully melt rear one-shot forming by electrically heated mode, and the ETFE raw material after improvement will can produce bubble hardly, also increased and the conjugation of steel construction, promoted 15% than traditional handicraft, perfectly played effect of anticorrosion, anti-bonding, high temperature resistant, resistance to positive and negative pressure.Computerized control reached Artificial Control be beyond one's reach high request and high standardization, and computermatic prerun has significantly promoted the success rate of product, and the detection after installation has more successfully reduced the unnecessary loss causing because of personnel's misoperation.Step unnecessary under many manual operations has been omitted in the production of automation, only needs personnel to keep an eye in good time, has significantly reduced production cost.Mechanization process mouthful mouth of pipe perfection reach absolute plane planarization, increased with is connected mouthful the sealing of the mouth of pipe, reduce the possibility of leakage.
The unstability of traditional handicraft that the present invention has used the electrically heated technologic improvement of automation, stopped the environmental pollution that may cause, the ETFE raw material after improvement has promoted the rigidity with conjugation and the material itself of steel construction.The sealing surface of machining cutting makes plane more smooth smooth, has increased the adaptation of interface.
The advantage of the rotation liner that the present invention produces:
1, the product requiring applicable to various liner wall thickness.
2, there is no flow liner, weld mark and seam.
3, core rod that need not be expensive is made spending, and cost is low.
4, can process the workpiece of inner chamber complexity.
5, can closely depend on workpiece inwall, can resistance to negative pressure.
6, efficiency improves, and shorten process time.
Accompanying drawing explanation
Fig. 1 is the process chart that the present invention rotates liner.
the specific embodiment
With best embodiment, the present invention is described in detail below.
Ethylene-tetrafluoroethylene copolymer rotational molding technique, take ETFE as raw material, in raw material, the mass content of ethylene-tetrafluoroethylene is 70-80%; In workpiece, put into ETFE raw material, this workpiece is placed in electrically heated baking oven, in baking oven and heat, and make workpiece do diaxon rotation, rotary speed is 15-60 rev/min, heated parts and ETFE raw material form the improvement ETFE lining coating of one deck densification in surface of the work fusing simultaneously, a last mouthful mouth of pipe surface by machining workpiece.
ETFE is that raw material adopts electrical heating method, ETFE is heated to 120-250 ℃ and improves.
In baking oven, heating-up temperature is 120--250 ℃.
ETFE material: ethylene-tetrafluoroethylene copolymer claims again Fluroplast-4 0, is called for short ETFE or F40.Being that tetrafluoroethene and ethylene copolymer form, is a kind of resistant to elevated temperatures fluoroplastics, and serviceability temperature scope is-60～180 ℃.Also be the lighter (D=.1.7) of proportion in fluoroplastics, be translucent.
Ethylene-tetrafluoroethylene copolymer (F40), tetrafluoroethene content wherein (by weight) more than 3/4ths, therefore it has kept the resistance to chemical corrosion that polytetrafluoroethylene (PTFE) is good, also have good heat-resisting simultaneously, wear-resisting, radiation hardness and shock-resistant and electrical insulation capability.Its tensile strength can reach 50Mpa, is the twice of polyflon.Due to its good performance, can be suitable for injection moulding and rotational moulding processing, particularly use the steel lining F40 member of rotation Lining Technology processing, can and steel produce good adhesive force, make to process the real fluoroplastics that can bear negative pressure tightly lining equipment become possibility.F40 strengthens by glass fibre, can further improve its impact strength, creep resistant, rigidity and dimensional stability.Therefore at etch-proof chemical industry equipment lining, seal, pump, valve, pipeline, the production aspects such as pipe fitting, have been widely used and good prospect.
The technological process of rotation liner as follows as shown in Figure 1.
Feature of the present invention:
1, the ETFE raw material of improvement, has promoted the degree of adhesion with steel construction.
2, the ETFE rotational moulding technical matters of improvement, is used the computerized Electric heating of controlling.
3, sealing surface adopts machining mode, once completes the processing of plane.
4, the ETFE rotational moulding technical matters, the sealing surface machining processes that adopt improvement, reduced personnel's use and unnecessary material unaccounted-for (MUF).Reduce enterprise's production cost, improved production efficiency.
Finally it should be noted that: obviously, above-described embodiment is only for example of the present invention is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being amplified out thus or variation are still among protection scope of the present invention.
Claims (3)
1. ethylene-tetrafluoroethylene copolymer rotational molding technique, is characterized in that, take ETFE as raw material, in raw material, the mass content of ethylene-tetrafluoroethylene is 70-80%; In workpiece, put into ETFE raw material, this workpiece is placed in electrically heated baking oven, in baking oven and heat, and make workpiece do diaxon rotation, rotary speed is 15-60 rev/min, heated parts and ETFE raw material form the improvement ETFE lining coating of one deck densification in surface of the work fusing simultaneously, a last mouthful mouth of pipe surface by machining workpiece.
2. ethylene-tetrafluoroethylene copolymer rotational molding technique as claimed in claim 1, is characterized in that, ETFE is that raw material adopts electrical heating method, ETFE is heated to 120-250 ℃ and improves.
3. ethylene-tetrafluoroethylene copolymer rotational molding technique as claimed in claim 1, is characterized in that, in baking oven, heating-up temperature is 120--250 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398097.7A CN103770262A (en) | 2012-10-19 | 2012-10-19 | Ethylene-tetrafluoroethene copolymer rotational moulding technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398097.7A CN103770262A (en) | 2012-10-19 | 2012-10-19 | Ethylene-tetrafluoroethene copolymer rotational moulding technology |
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| CN103770262A true CN103770262A (en) | 2014-05-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141350A (en) * | 2019-12-30 | 2020-05-12 | 西安国仪测控股份有限公司 | U-shaped tube mass flowmeter capable of resisting strong acid and alkali corrosive media and manufacturing method thereof |
| CN111409222A (en) * | 2020-03-03 | 2020-07-14 | 江西汇丰管业有限公司 | Manufacturing process of rotational molding joint |
-
2012
- 2012-10-19 CN CN201210398097.7A patent/CN103770262A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141350A (en) * | 2019-12-30 | 2020-05-12 | 西安国仪测控股份有限公司 | U-shaped tube mass flowmeter capable of resisting strong acid and alkali corrosive media and manufacturing method thereof |
| CN111141350B (en) * | 2019-12-30 | 2021-09-03 | 西安国仪测控股份有限公司 | U-shaped tube mass flowmeter capable of resisting strong acid and alkali corrosive media and manufacturing method thereof |
| CN111409222A (en) * | 2020-03-03 | 2020-07-14 | 江西汇丰管业有限公司 | Manufacturing process of rotational molding joint |
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Application publication date: 20140507 |