CN103770439B - A kind of production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm - Google Patents
A kind of production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm Download PDFInfo
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- CN103770439B CN103770439B CN201310737796.4A CN201310737796A CN103770439B CN 103770439 B CN103770439 B CN 103770439B CN 201310737796 A CN201310737796 A CN 201310737796A CN 103770439 B CN103770439 B CN 103770439B
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Abstract
The invention discloses a kind of production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm, belong to rubber manufacture field.The steps include: the pretreatment of (1) folder cloth: immersed by warp-weft same-nature nylon cloth in fluorosioloxane rubber adhesive, squeeze the adhesive removing warp-weft same-nature nylon cloth excess surface afterwards, stand-by after finally warp-weft same-nature nylon cloth being dried; (2) size performing: semi-finished rubber bar fluorine-silicon compounded rubber stock film being cut into definite shape; (3) mold filling; (4) sizing material precompressed; (5) pre-laminated steel is taken out; (6) sulfuration of folder cloth is filled out; (7) demoulding: open mold, bed die, takes out the folder cloth diaphragm vulcanizated; (8) finished product is die-cut: utilize die cutting die, the folder cloth diaphragm produced is cut into the finished product diaphragm of required specification.Method of the present invention is low to preformed required precision, and during molded vulcanization molding sulfuration, sizing material flowing is little, and graticule displacement of weaving cotton cloth is little, and product size is stablized.
Description
Technical field
The invention belongs to rubber manufacture field, especially relate to a kind of production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm.
Background technology
General Purpose Rubber ultra-thin folder cloth diaphragm processes multiplex calender by after the rubber of woven cloth two sides, then uses drum-type sulfidization molding.And ultra-thin fluorosioloxane rubber folder cloth diaphragm is because fluorosioloxane rubber is excessively sticky, when using calender rubber, very easily there is roll banding in fluorosioloxane rubber, cause sizing material cannot be attached to woven cloth surface uniformly, the original warp of products thickness lack of homogeneity, woven cloth and parallel also can be subjected to displacement, the bearing strength of such diaphragm can obviously decline, and risk of leakage obviously increases.Therefore ultra-thin fluorosioloxane rubber folder cloth diaphragm many employings compression molding sulfuration process is produced.
Publication number is that the patent of invention of CN102563189A discloses a kind of manufacturing process of pressing from both sides cloth diaphragm, its production technology needs the two-layer outer rubber sheet of previously prepared annular, annular to strengthen tissue layer, again sheet rubber, enhancing tissue layer are superposed successively, need to guarantee that every layer of inside and outside circular centre hole of article is aimed at simultaneously, after molded vulcanization is shaping, again grinding is carried out to diaphragm.There is following defect in the method: (1) needs previously prepared annular rubber sheet, annular to strengthen tissue layer, and it is high that semi-finished product prepare precision, and production cost is high; (2) molded vulcanization shaping before need sheet rubber, strengthen tissue layer and superpose successively, need to guarantee that every layer of inside and outside circular centre hole of article is aimed at simultaneously.Every layer of inside and outside circular centre hole degree of registration of article also cannot ensure, product quality fluctuation is large; (3) sheet rubber inserted in die cavity can produce flowing when mold pressing, can make to weave cotton cloth through being subjected to displacement with parallel during flowing, makes diaphragm bearing capacity uneven; (4) sheet rubber inserted in die cavity can produce flowing when mold pressing, and flowing can make two sides film in uneven thickness; (5) diaphragm needs grinding inside and outside circle one by one, and processing cost is higher, inefficiency.
Publication number be CN202006532U patent document discloses a kind of mould for the production of canvas filler rubber diaphragm.This mould comprises cope match-plate pattern, middle template and lower bolster, and middle template is all provided with projection on two maximum surfaces.By rubber sheet during this utility model technology production rubber diaphragm is reserved with the corresponding space holding base cloth, this technology thoroughly can solve the problem of the skew of base cloth and fold, Ji Bu can be made to be positioned at rubber sheet be positioned at the middle of diaphragm and divide at diaphragm inner, play support and booster action thus; The thickness evenness of rubber diaphragm utilizing this mould to produce gained is controlled further, its thickest with the thinnest difference within 0.05mm; Without the need to dropping into main equipment when utilizing this mould, only needing dull and stereotyped vulcanizing machine and sulfurizing mould to produce, thus greatly reducing production cost.Its weak point is: the production technology of the prior art needs previously prepared circle to strengthen tissue layer, again this tissue layer is inserted die cavity, in die cavity, need guarantee that the film layers cylindrical center of circle strengthened in tissue layer cylindrical and die cavity is aimed at, once fill out partially, goods must be caused to scrap.But in actual production process, the film layers cylindrical impossible 100% strengthened in tissue layer cylindrical and die cavity overlaps, and two circles must have the part do not overlapped, and the diaphragm edge place that one side of something that fabric is many processes has excess fabric layer or burr produce.For excess fabric layer, if phase pruning reaches smooth, round and smooth after coming round, very difficult.And for burr, post-processed, wastes time and energy especially, do not reach Product Precision requirement yet; One side of something that fabric is few, because diaphragm inside does not have fabric to strengthen, the intensity of diaphragm can decline greatly.Also there is a problem in the prior art, namely the production technology based on the method needs first to carry out stamping-out to tissue layer, but, in the process of stamping-out, very short warp, parallel can be formed in the edge of tissue layer, these warps, parallel cannot well be attached on fabric because length is too short, easily come off, the braiding trend of the graticule at tissue layer edge also can be damaged simultaneously, in this case, the intensity at the edge of the diaphragm of working it out can decline greatly, cannot meet production requirement at all.In addition, in this process, middle template surface does not do specially treated, and in cannot guaranteeing to take out, during template, film is only bonded in the die cavity of upper/lower die, and is not bonded in middle template.
Summary of the invention
1. the technical problem that will solve
When producing ultra-thin fluorosioloxane rubber folder cloth diaphragm for common process in prior art, complex manufacturing, cost are high, and the diaphragm encapsulate thickness evenness produced is poor, the original warp of warp-weft same-nature nylon cloth and parallel are subjected to displacement, and the bearing strength of diaphragm obviously descends degradation problem, the invention provides a kind of production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm, this method is low to preformed required precision, during molded vulcanization molding sulfuration, sizing material flowing is little, and graticule displacement of weaving cotton cloth is little, and product size is stablized.
2. technical scheme
The present invention adopts following technical scheme:
A production method for ultra-thin fluorosioloxane rubber folder cloth diaphragm, the steps include:
(1) cloth pretreatment is pressed from both sides: immersed by warp-weft same-nature nylon cloth in fluorosioloxane rubber adhesive, squeeze the adhesive removing warp-weft same-nature nylon cloth excess surface afterwards, stand-by after finally warp-weft same-nature nylon cloth being dried;
(2) size performing: semi-finished rubber bar fluorine-silicon compounded rubber stock film being cut into definite shape;
(3) mold filling: the lower surface of mold is provided with upper cavity, the upper surface of bed die is provided with the lower mode cavity corresponding with described upper cavity, rubber strip in step (2) is inserted in upper cavity and lower mode cavity respectively, be provided with the steel plate making upper cavity and lower mode cavity isolation between described upper cavity and lower mode cavity, the two-sided of steel plate scribbles PTFE coating.The two-sided of steel plate scribbles PTFE coating, makes the rubber when steel plate is taken out in die sinking adhesion can not have sizing material.
(4) sizing material precompressed: use vulcanizing press to pressurize to the mould in step (3), sizing material in die cavity is under the effect of pressure and heat, evenly be full of upper cavity and lower mode cavity, upper and lower die cavity both sides are arranged with excessive glue groove in parallel, and unnecessary sizing material goes out die cavity from excessive glue concentrated flow under the effect of the pressure;
(5) take out steel plate: open mould, take out steel plate;
(6) sulfuration of folder cloth is filled out: insert the warp-weft same-nature nylon cloth processed in step (1), then pressurize, sulfuration;
(7) demoulding: open mold, bed die, takes out the folder cloth diaphragm vulcanizated;
(8) finished product is die-cut: utilize die cutting die, the folder cloth diaphragm produced is cut into the finished product diaphragm of required specification.
Preferably, in described step (4), described excessive glue groove depth 1mm, wide 2mm.
Preferably, in described step (4), vulcanizing press is used to be 40 ~ 60kg/cm to the pressure that mould pressurizes
2.
Preferably, in described step (6), institute's plus-pressure size is 170 ~ 190kg/cm
2, cure time is 7 ~ 9min.
3. beneficial effect
Adopt technical scheme of the present invention, compared with existing known technology, there is following remarkable result:
(1) production method of a kind of ultra-thin fluorosioloxane rubber folder cloth diaphragm of the present invention, sizing material is depressed in die cavity in advance, sizing material is evenly distributed, upper and lower die cavity both sides are arranged with the excessive glue groove of some dark 1mm, wide 2mm in parallel simultaneously, make redundant rubber stock can discharge die cavity from excessive glue groove, so the warp-weft same-nature nylon cloth surface encapsulate obtained is even, products thickness uniformity is good, and products thickness deviation can in control 0.05mm;
(2) production method of a kind of ultra-thin fluorosioloxane rubber folder cloth diaphragm of the present invention, because of before filling out and putting warp-weft same-nature nylon cloth, sizing material is evenly full of die cavity, flow little so fill out sizing material when putting warp-weft same-nature nylon cloth press cure, the original warp of warp-weft same-nature nylon cloth and parallel can not be subjected to displacement, and diaphragm each position performance is even, and the bearing strength of diaphragm is high, goods good compactness, steady quality;
(3) production method of a kind of ultra-thin fluorosioloxane rubber folder cloth diaphragm of the present invention, because adopting compression molding face mold cure, sulfide stress is high, so goods are fine and close, better than the goods of drum-type sulfuration, and technique is simple, and equipment investment is little;
(4) production method of a kind of ultra-thin fluorosioloxane rubber folder cloth diaphragm of the present invention, adopt and first process sheblack rubber insertion sheet, be then die-cut into finished product diaphragm, low to preformed required precision in early stage, shaping efficiency is high, and cost is low;
(5) finished product diaphragm adopts die cutting die one-step punching to form, and die-cut dimensional accuracy is high, diaphragm outer edge without burr, inside and outside dimensional tolerance can be controlled in ± 0.05mm in, within inside and outside circle concentricity can be controlled in 0.1mm; Diaphragm edge canvas filler layer structure is without appointing damage, and diaphragm overall structure is even, pressure be 10bar, under frequency is the impulsive condition of 5HZ, still No leakage after pulse 1,200,000 times;
(6) this diaphragm folder cloth adopts warp-weft same-nature nylon cloth, makes diaphragm when pressure-bearing, uniform force on warp and parallel, thus make diaphragm warp-wise, broadwise breaking strength reaches 60MPa simultaneously.
Accompanying drawing explanation
Fig. 1 is finished film chip architecture schematic diagram of the present invention;
Fig. 2 is the enlarged diagram of mold filling structure of the present invention;
Fig. 3 is the enlarged diagram filling out folder cloth vulcanizable construction of the present invention.
In figure: 1, sheet rubber; 2, warp-weft same-nature nylon cloth; 3, upper cavity; 4, steel plate; 5, lower mode cavity; 6, rubber strip; 7, overflow glue groove.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, the present invention is described in detail.
Embodiment 1
The production method of a kind of ultra-thin fluorosioloxane rubber folder cloth diaphragm of the present embodiment, the steps include:
(1) press from both sides cloth pretreatment: immersed by warp-weft same-nature nylon cloth 2 in the special adhesive of fluorosioloxane rubber, squeeze the adhesive removing warp-weft same-nature nylon cloth 2 excess surface afterwards, finally warp-weft same-nature nylon cloth 2 is dried rear stand-by;
(2) size performing: the semi-finished rubber bar 6 fluorine-silicon compounded rubber stock film being cut into constant weight, size and dimension;
(3) mold filling: the lower surface of mold is provided with upper cavity 3, the upper surface of bed die is provided with the lower mode cavity 5 corresponding with upper cavity 3, rubber strip 6 in step (2) is inserted respectively in upper cavity 3, lower mode cavity 5, and then between the die cavity of upper and lower mould, insert the two-sided steel plate 4 scribbling PTFE coating, the die cavity of upper and lower mould is isolated, as shown in Figure 2;
(4) sizing material precompressed: use vulcanizing press to pressurize to described mould, pressure size 40kg/cm
2, the sizing material 6 in die cavity is under the effect of pressure and heat, and be evenly full of upper and lower die cavity, upper and lower die cavity both sides are arranged with the excessive glue groove 7 of dark 1mm, wide 2mm in parallel, and unnecessary sizing material under the effect of the pressure, flows out die cavity from excessive glue groove 7;
(5) get steel plate 4: open mould, take out steel plate 4, because steel plate 4 scribbles PTFE coating, when steel plate 4 is taken out in die sinking, rubber adhesion can not have sizing material;
(6) sulfuration of folder cloth is filled out: insert the warp-weft same-nature nylon cloth 2 processed in step (1), then pressurize about 170kg/cm
2sulfuration 7 minutes; As shown in Figure 3.
(7) demoulding: open mold, bed die, takes out the sheblack rubber insertion sheet vulcanizated;
(8) finished product is die-cut: utilize die cutting die, the folder cloth diaphragm produced is determined the finished product diaphragm of required specification.As shown in Figure 1, diaphragm structure is made up of sheet rubber 1 and warp-weft same-nature nylon cloth 2.
Embodiment 2
The production method of a kind of ultra-thin fluorosioloxane rubber folder cloth diaphragm of the present embodiment, substantially with embodiment 1, its difference is, in described step (4), uses vulcanizing press to be 60kg/cm to the pressure that mould pressurizes
2.In described step (6), institute's plus-pressure size is 190kg/cm
2, cure time is 9min.
Embodiment 3
The production method of a kind of ultra-thin fluorosioloxane rubber folder cloth diaphragm of the present embodiment, substantially with embodiment 1, its difference is, in described step (4), uses vulcanizing press to be 50kg/cm to the pressure that mould pressurizes
2.In described step (6), institute's plus-pressure size is 180kg/cm
2, cure time is 8min.
Adopt the folder cloth diaphragm that the method for above-described embodiment 1 ~ 3 is produced, its performance parameter is as follows:
(1) because sizing material is depressed in die cavity in advance, sizing material is evenly distributed, and makes redundant rubber stock can discharge die cavity from excessive glue groove 7 simultaneously, so, the surperficial encapsulate of warp-weft same-nature nylon cloth 2 obtained is even, and products thickness uniformity is good, and products thickness deviation can in control 0.05mm;
(2) finished product diaphragm adopts die cutting die one-step punching to form, and die-cut dimensional accuracy is high, diaphragm outer edge without burr, inside and outside dimensional tolerance can be controlled in ± 0.05mm in, within inside and outside circle concentricity can be controlled in 0.1mm; Diaphragm edge canvas filler layer structure is without appointing damage, and diaphragm overall structure is even, pressure be 10bar, under frequency is the impulsive condition of 5HZ, still No leakage after pulse 1,200,000 times;
(3) this diaphragm folder cloth adopts warp-weft same-nature nylon cloth 2, makes diaphragm when pressure-bearing, uniform force on warp and parallel, thus make diaphragm warp-wise, broadwise breaking strength reaches 60MPa simultaneously.
Claims (4)
1. a production method for ultra-thin fluorosioloxane rubber folder cloth diaphragm, the steps include:
(1) cloth pretreatment is pressed from both sides: immersed by warp-weft same-nature nylon cloth (2) in fluorosioloxane rubber adhesive, squeeze the adhesive removing warp-weft same-nature nylon cloth (2) excess surface afterwards, stand-by after finally warp-weft same-nature nylon cloth (2) being dried;
(2) size performing: the semi-finished rubber bar (6) fluorine-silicon compounded rubber stock film being cut into definite shape;
(3) mold filling: the lower surface of mold is provided with upper cavity (3), the upper surface of bed die is provided with the lower mode cavity (5) corresponding with described upper cavity (3), rubber strip (6) in step (2) is inserted respectively in upper cavity (3) and lower mode cavity (5), be provided with the steel plate (4) that upper cavity (3) and lower mode cavity (5) are isolated between described upper cavity (3) and lower mode cavity (5), the two-sided of steel plate (4) scribbles PTFE coating;
(4) sizing material precompressed: use vulcanizing press to pressurize to the mould in step (3), sizing material in die cavity is under the effect of pressure and heat, evenly be full of upper cavity (3) and lower mode cavity (5), upper and lower die cavity both sides are arranged with excessive glue groove (7) in parallel, and unnecessary sizing material flows out die cavity from excessive glue groove (7) under the effect of the pressure;
(5) take out steel plate (4): open mould, take out steel plate (4);
(6) sulfuration of folder cloth is filled out: insert the warp-weft same-nature nylon cloth (2) processed in step (1), then pressurize, sulfuration;
(7) demoulding: open mold, bed die, takes out the folder cloth diaphragm vulcanizated;
(8) finished product is die-cut: utilize die cutting die, the folder cloth diaphragm produced is cut into the finished product diaphragm of required specification.
2. the production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm according to claim 1, is characterized in that, in described step (4), and described excessive glue groove (7) dark 1mm, wide 2mm.
3. the production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm according to claim 1 and 2, is characterized in that, in described step (4), use vulcanizing press to be 40 ~ 60kg/cm to the pressure that mould pressurizes
2.
4. the production method of ultra-thin fluorosioloxane rubber folder cloth diaphragm according to claim 3, it is characterized in that, in described step (6), institute's plus-pressure size is 170 ~ 190kg/cm
2, cure time is 7 ~ 9min.
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| CN108372668A (en) * | 2018-02-11 | 2018-08-07 | 江苏神通阀门股份有限公司 | One kind is for making folder cloth diaphragm rubberized fabric and preparation method thereof |
| CN108381953A (en) * | 2018-02-11 | 2018-08-10 | 江苏神通阀门股份有限公司 | A kind of forming method for making folder cloth diaphragm rubberized fabric |
| CN111844813A (en) * | 2020-07-31 | 2020-10-30 | 宁波泰科威橡胶科技有限公司 | Membrane preforming process |
| CN112976621A (en) * | 2021-03-15 | 2021-06-18 | 日照市恒通水处理设备有限公司 | Processing technology of PTFE composite membrane |
| CN114714548B (en) * | 2022-03-09 | 2023-04-07 | 广州流体密封科技有限公司 | Preparation method of wear-resistant and winding-resistant arc-shaped composite diaphragm for U-shaped filling valve |
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