CN101209585A - Preparation method of large-scale fluororubber O-type ring - Google Patents
Preparation method of large-scale fluororubber O-type ring Download PDFInfo
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- CN101209585A CN101209585A CNA2006101479837A CN200610147983A CN101209585A CN 101209585 A CN101209585 A CN 101209585A CN A2006101479837 A CNA2006101479837 A CN A2006101479837A CN 200610147983 A CN200610147983 A CN 200610147983A CN 101209585 A CN101209585 A CN 101209585A
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Abstract
The invention relates to a preparation method of a large fluorubber O-shaped ring which is made by adopting a die which is a pair of folio slab dies; the upper slab surface and the lower slab surface of the die are respectively provided with a round trough which corresponds to each other longitudinally so as to form a linear round hole at the joint of the upper slab surface and the lower slab surface; the die is connected with a heating device. The preparation method is that fluorubber is processed through plasticating and mixing and green glue stock round bars are extruded by using an extruding machine; glue bars are arranged into a die cavity trough which is arranged at the lower part of the die; when material is added to a first section, little head part is arranged outside the die and an upper die is butted for pressurization; the die is heated to the temperature of 155-165 DEG C and is then opened after pressurization; the sections are processed sequentially by adding material and the final section is not processed; after that, the glue bars are taken down for cutting; part tail and the head which is not processed are overlapped together circularly and sulfurized. Product which is manufactured according to the method has the advantages of high product precision, low manufacturing cost, simple operation and high yield.
Description
Technical field
The present invention relates to O type rubber ring, particularly a kind of preparation method of large-scale fluororubber O-type ring.
Background technology
O type rubber ring is widely used in the hydraulic pressure and the baric systerm of various device, plays sealing function.That the O RunddichtringO has is simple in structure, good sealing effect, bear characteristics such as operating pressure height, manufacture craft be simple.
The making of O type circle after sizing material technology premenstruum (premenstrua), is extruded certain-length usually based on compression molding, and the annular mold cavity of packing into is through the heating press cure, if fluorubber need carry out post-cure and form.
For the making of large-scale O type circle, normally extrude adhesive tape, through being sulfided into the strip goods, according to forming with bonding agent is bonding after the required length cutting.
But O RunddichtringO for specific (special) requirements, as large-scale, resistant to elevated temperatures sealing ring, such as diameter is 2～3m, the line footpath only is 10～12mm, requirement can be used under 250 ℃ of high temperature for a long time, this sealing ring can't bear high temperature like this and make that easily adhesive failure comes off owing to the fluororubber binding agent, so can only adopt large mold to make.So just cause having increased die cost, also very high to the requirement of press and attached heater in addition.Owing to the difference of sizing material shrinkage factor with prescription and fabrication process condition, the difficult control of shrinkage factor causes percent defective higher again.
Summary of the invention
Task of the present invention provides a kind of preparation method of large-scale fluororubber O-type ring, and it has solved with the O type circle preparation method of prior art can't make large-scale, resistant to elevated temperatures sealing ring, and has increased problem such as die cost because of processing technology is high.
Technical solution of the present invention is as follows:
A kind of preparation method of large-scale fluororubber O-type ring, adopt Mold Making, described mould is the dull and stereotyped mould that a pair is split, one vertically corresponding mutually round groove respectively is set on two plate level up and down of mould, to constitute two commissural straight line circular holes of plate level up and down, mould connects heater;
Described preparation method be earlier with fluorubber through mould, mixing processing, utilize extruder to extrude green glue stock circle bar, adhesive tape is put into the die cavity groove of mould bottom, first section its head when reinforced stays a little outside mould, and the patrix that closes pressurization is with mold heated to 155 ℃～165 ℃, and thermostatic control is between 158 ℃～162 ℃, open mould after the pressurization, the reinforced piecemeal processing of order remains one section at last and does not process; Take off adhesive tape then, block by Len req, intercepted part afterbody and the head of not doing processing are overlapped ringwise shape, vulcanize once more, the temperature of post-cure is 220 ℃～240 ℃, and the time is 24 hours.
Preparation method by large-scale fluororubber O-type ring of the present invention, adopt a kind of comparatively easy method and apparatus to make, the product precision height of making, cost of manufacture is descended significantly, and product used in the following long period of working condition of 250 ℃ of high temperature can remain intact rate.
Adopt preparation method of the present invention, the large-scale fluororubber O-type ring size of making is accurate, can control its size preferably in last annular lap joint process.Easy and simple to handle in production, the yield rate height, input mould, equipment are less, have saved cost thus.
Description of drawings
Accompanying drawing is the mould structure schematic diagram by large-scale fluororubber O-type ring preparation method of the present invention.
The specific embodiment
Referring to accompanying drawing, preparation method by a kind of large-scale fluororubber O-type ring of the present invention adopts Mold Making, this mould is the dull and stereotyped mould 1 that a pair is split, a vertically corresponding mutually round groove respectively is set, to constitute two commissural straight line circular holes 2 that vertically are provided with of plate level up and down on two plate level up and down of mould.The diameter of this circular hole 2 is the line footpath diameter of O type circle, and for example line directly is the O type circle of 10mm, considers that the diameter in shrinkage factor hole is 10+0.15～0.25mm.
The width of this flat plate mold 1 is greater than the diameter in O type astragal footpath, and the length of mould can generally adopt 700～1000mm with reference to the diameter and the molding apparatus of large-scale O type circle.
This flat plate mold 1 connects heater.Mold heating device system is made up of the board-like element of far infrared resistance heated, and it can make mold heated to rubber sulfurizing temp, and general fluorubber is heated to 155 ℃～165 ℃.
By preparation method of the present invention, adopt following process steps:
1, at first make the green glue stock bar, with fluorubber through mould, mixing processing, utilize extruder to extrude the green glue stock circle bar of certain specification.As make line and directly be the O type circle of 10mm, need extrude diameter is the cylindrical adhesive tape of 11mm.
2, cylindrical adhesive tape is put into the die cavity groove of mould bottom, first section its head when reinforced stay a little for example 200mm outside mould, the patrix that closes pressurization, with mold heated to 155 ℃～165 ℃, and thermostatic control is between 158 ℃～162 ℃.
3, open mould after the pressurization some time, the reinforced piecemeal processing of order to Len req, remains one section at last and does not process.
4, take off adhesive tape then, measure its physical length, block, intercepted part afterbody and the head of not doing processing are overlapped ringwise shape by Len req.This adhesive tape final stage and first paragraph header portion process sum less than die length.Can obtain accurate and the large-scale fluororubber O-type ring of a size thus through once vulcanizing.
5, because the particularity of fluorubber processing also need be carried out post-cure by preparation method of the present invention to the O type circle through once sulfuration, and the temperature of post-cure is between 220 ℃～240 ℃, the time is 24 hours.Post-cure can compensate piecemeal the once part weak point of sulfuration, to reach balanced fluorubber physical and chemical index.
Be made into large-scale fluororubber O-type ring at last by preparation method of the present invention.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the present invention, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention variation, the modification of the foregoing description.
Claims (3)
1. the preparation method of a large-scale fluororubber O-type ring, adopt Mold Making, it is characterized in that, described mould is the dull and stereotyped mould that a pair is split, one vertically corresponding mutually round groove respectively is set on two plate level up and down of mould, to constitute two commissural straight line circular holes of plate level up and down, mould connects heater;
Described preparation method be earlier with fluorubber through mould, mixing processing, utilize extruder to extrude green glue stock circle bar, adhesive tape is put into the die cavity groove of mould bottom, first section its head when reinforced stays a little outside mould, and the patrix that closes pressurization is with mold heated to 155 ℃～165 ℃, and thermostatic control is between 158 ℃～162 ℃, open mould after the pressurization, the reinforced piecemeal processing of order remains one section at last and does not process; Take off adhesive tape then, block by Len req, intercepted part afterbody and the head of not doing processing are overlapped ringwise shape, vulcanize once more, the temperature of post-cure is 220 ℃～240 ℃, and the time is 24 hours.
2. the preparation method of large-scale fluororubber O-type ring according to claim 1 is characterized in that, described mold heating device is to be made up of the board-like element of far infrared resistance heated.
3. the preparation method of large-scale fluororubber O-type ring according to claim 1 is characterized in that, described adhesive tape final stage and first paragraph header portion process sum less than die length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101479837A CN101209585A (en) | 2006-12-26 | 2006-12-26 | Preparation method of large-scale fluororubber O-type ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101479837A CN101209585A (en) | 2006-12-26 | 2006-12-26 | Preparation method of large-scale fluororubber O-type ring |
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| CN101209585A true CN101209585A (en) | 2008-07-02 |
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| CNA2006101479837A Pending CN101209585A (en) | 2006-12-26 | 2006-12-26 | Preparation method of large-scale fluororubber O-type ring |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323157B (en) * | 2008-07-14 | 2010-09-01 | 东莞市新志密封技术有限公司 | Method for producing sealing ring |
| CN102179888A (en) * | 2010-12-27 | 2011-09-14 | 东莞市新志密封技术有限公司 | Method for processing large non-standard O ring and mould device |
| CN102310568A (en) * | 2011-07-20 | 2012-01-11 | 陈建立 | Production process for broad and ultra long rubber plates used for photovoltaic laminating machine |
| CN102366994A (en) * | 2011-10-25 | 2012-03-07 | 航天材料及工艺研究所 | Precision preforming mouth-type die for O-shaped ring rubber base |
| CN102990930A (en) * | 2012-12-13 | 2013-03-27 | 深圳市飞荣达科技股份有限公司 | Processing apparatus and processing method for hollow O-shaped rubber ring joint |
| CN106335201A (en) * | 2016-08-26 | 2017-01-18 | 萍乡市欧凯孚密封件有限公司 | Production process of oil sump sealing strip of generator set |
| CN107283851A (en) * | 2017-06-27 | 2017-10-24 | 河南平高电气股份有限公司 | Rubber strip connection method, sealing ring processing technology and process equipment |
| CN109732811A (en) * | 2019-02-18 | 2019-05-10 | 上海如实密封科技有限公司 | A kind of sealing element segmental vulcanization mould and sealing element preparation method |
| CN110539428A (en) * | 2019-10-15 | 2019-12-06 | 咸阳裕华橡胶制品有限公司 | Preparation method of rubber sealing element and vulcanization mold thereof |
| CN112223603A (en) * | 2019-07-15 | 2021-01-15 | 中国石油天然气股份有限公司 | Manufacturing method and die of sealing ring |
| CN113844038A (en) * | 2021-09-25 | 2021-12-28 | 黄昭雄 | End-to-end seamless butt joint method for large-size fluororubber sealing ring |
-
2006
- 2006-12-26 CN CNA2006101479837A patent/CN101209585A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323157B (en) * | 2008-07-14 | 2010-09-01 | 东莞市新志密封技术有限公司 | Method for producing sealing ring |
| CN102179888A (en) * | 2010-12-27 | 2011-09-14 | 东莞市新志密封技术有限公司 | Method for processing large non-standard O ring and mould device |
| CN102310568A (en) * | 2011-07-20 | 2012-01-11 | 陈建立 | Production process for broad and ultra long rubber plates used for photovoltaic laminating machine |
| CN102366994A (en) * | 2011-10-25 | 2012-03-07 | 航天材料及工艺研究所 | Precision preforming mouth-type die for O-shaped ring rubber base |
| CN102990930A (en) * | 2012-12-13 | 2013-03-27 | 深圳市飞荣达科技股份有限公司 | Processing apparatus and processing method for hollow O-shaped rubber ring joint |
| CN106335201A (en) * | 2016-08-26 | 2017-01-18 | 萍乡市欧凯孚密封件有限公司 | Production process of oil sump sealing strip of generator set |
| CN107283851A (en) * | 2017-06-27 | 2017-10-24 | 河南平高电气股份有限公司 | Rubber strip connection method, sealing ring processing technology and process equipment |
| CN107283851B (en) * | 2017-06-27 | 2020-04-28 | 河南平高电气股份有限公司 | Rubber strip connecting method, sealing ring processing technology and processing equipment |
| CN109732811A (en) * | 2019-02-18 | 2019-05-10 | 上海如实密封科技有限公司 | A kind of sealing element segmental vulcanization mould and sealing element preparation method |
| CN112223603A (en) * | 2019-07-15 | 2021-01-15 | 中国石油天然气股份有限公司 | Manufacturing method and die of sealing ring |
| CN110539428A (en) * | 2019-10-15 | 2019-12-06 | 咸阳裕华橡胶制品有限公司 | Preparation method of rubber sealing element and vulcanization mold thereof |
| CN110539428B (en) * | 2019-10-15 | 2022-08-30 | 陕西裕华永赫航宇科技有限公司 | Preparation method of rubber sealing element and vulcanization mold thereof |
| CN113844038A (en) * | 2021-09-25 | 2021-12-28 | 黄昭雄 | End-to-end seamless butt joint method for large-size fluororubber sealing ring |
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Open date: 20080702 |