CN101204840A - Liquid polysulfone seal glue mould forming process - Google Patents
Liquid polysulfone seal glue mould forming process Download PDFInfo
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- CN101204840A CN101204840A CNA2007100506899A CN200710050689A CN101204840A CN 101204840 A CN101204840 A CN 101204840A CN A2007100506899 A CNA2007100506899 A CN A2007100506899A CN 200710050689 A CN200710050689 A CN 200710050689A CN 101204840 A CN101204840 A CN 101204840A
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- liquid polysulfide
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Abstract
The invention discloses a liquid polysulfide sealant molding process, which comprises the steps that: mold making, a metal combination mold with slot structure is prepared; release agent spreading, release agent that does not stick to the liquid polysulfide sealant is adopted; liquid polysulfide sealant spreading, the air entrapped is expelled and the liquid polysulfide sealant is uniformly spread in the cavity of the metal combination mold that is phragmoid; pressing, pressing is carried out to ensure that the mold is attached and surplus liquid polysulfide sealant is squeezed out; vulcanization, liquid polysulfide sealant is vulcanized to gel state under room temperature, and then put in a heating equipment to vulcanize by heating and accelerating method; demoulding, after the vulcanization, the mold is opened to get the product. The invention employs reasonable mold structure and proper vulcanization process thus solves the problem in conventional molding process that release agents such as olefin, silicone oil, stearic acid, etc. adopted wildly at present result in that liquid polysulfide (e.g. XM-15, XM-22, XM-23) molding rubber products can not be demoulded, vulcanization small molecule can not be expelled, the products after vulcanization are bubbly, and molding products are with more air bubbles and poor quality of surfaces.
Description
Technical field
The present invention relates to a kind of process of liquid polysulphide rubber moulding rubber mold.
Background technology
Polysulfide rubber sealant is a kind of sealant based on liquid polysulphide rubber.Polysulfide rubber is a kind of many sulphur vinylite of rubber like.Be liquid under the liquid polysulfide rubber room temperature, and contain sulphur atom.Be generally the dark amber or sticky shape liquid of dark brown, mean molecule quantity is between 1000～5000.Mean molecule quantity is 1000, mainly as the plasticized modifier of epoxy resin and phenolic resins.Mean molecule quantity is 4000 the base-material that is used alone as polysulfide sealant usually.Its processing method is different with solid rubber, does not need main equipment, and can feed in raw material continuously, is easy to perfusion, can sulfidization molding under the normal temperature.Have active reactive group mercaptan on the strand of liquid polysulphide rubber, can react with multiple metal peroxides, organic peroxide and some oxidants.Owing to the liquid polysulfide fluid sealant has flexible air seal and the oil resistant sealing that good viscosity is widely used in opening wide the position to metal.Just because of the liquid polysulfide fluid sealant good bonding and a large amount of little molecule of sulfidation of metal are discharged, therefore adopt releasing agents such as present widely used paraffin in the conventional molding process planning, silicone oil, hard acid ester salt can make rubber can't the demoulding, the little molecule of sulfuration can't get rid of, often cause that the goods bubble is many after the moulding, surface quality is poor, become low rate.Therefore, this release agent material is not suitable as the rubber mold products use.Usually, polysulfide sealant machine-shaping rubber mold products is not simple physical process.Polysulfide sealant is made rubber need be through over-mastication, mixing, calendering or extrusion molding and basic working procedure such as sulfuration, demoulding isolation.Generally also need be in vulcanizing press, hydraulic press or sulfuration kettle cure.It is reduction in the numbers of seconds that the demoulding of rubber is isolated, and guarantees that face shaping and quality, texture even chain structure have material impact, is the important step of decision goods final structure and performance.At present, relate to the demoulding and little molecule eliminating process that polysulfide sealant is made rubber mold products, do not see the report that domestic and international pertinent literature is arranged.
Summary of the invention
The present invention is based on the liquid polysulfide fluid sealant to the viscosity of metal and this characteristic of a large amount of little molecule of sulfuration, at prior art vulcanize that little molecule can't be got rid of, the defective of many, the surface quality difference of goods bubble after the moulding, provide a kind of simple, convenient, the demoulding is fast, the yield rate height, the liquid polysulfone seal glue mould forming process of face shaping and quality better.
In order to achieve the above object, a kind of liquid polysulfone seal glue mould forming process provided by the invention comprises the steps:
(1) molding prepares a metallic combination mould with gap structure;
(2) separant coating, with can be in the metal surface film forming, and the releasing agent sticking with the liquid polysulfide fluid sealant, evenly apply on above-mentioned metallic combination mold cavity surface;
(3) gluing, the liquid polysulfide fluid sealant is mixing, get rid of the air that entrains into, and in the die cavity of the metallic combination mould of even paint film forming;
(4) exert pressure, assembling die is applied certain pressure, mould is fitted, extrude unnecessary glue;
(5) sulfuration to gel state, is put into the firing equipment accelerated cure of heating with the room temperature vulcanization of liquid polysulfide fluid sealant then;
(6) demoulding, sulfuration is opened mould, demoulding pickup after finishing.
Metallic combination mould of the present invention can be the formula splicing construction mould of inserting.
Releasing agent of the present invention can be a FREKOTE series releasing agent.
The present invention has following beneficial effect than prior art.
The present invention is applied in the FREKOTE series releasing agent of metal die mold cavity surface and adopts rational mould structure and suitable sulfuration process, and the barrier film of formation is simple, convenient, and the demoulding is fast, the yield rate height, the face shaping quality better has and is not transferred to finished product and mould, is difficult for the characteristic of incrustation.The insert mould of formula splicing construction and fill full metallic combination mold cavity along direction of employing makes the gap structure that has provide path for micromolecular eliminating in the sulfidation.Solved releasing agents such as conventional molding process planning and present widely used paraffin, silicone oil, hard acid ester salt can make the molded rubber of liquid polysulphide rubber can't the demoulding, the little molecule of sulfuration can't get rid of, sulfuration back product bubbles, and the moulded products bubble is many, the problem of surface quality difference.
The specific embodiment
To further illustrate the present invention in following examples, these embodiment only are used to the present invention is described and to the present invention without limits.
According to the present invention, prepare the formula splicing construction of inserting, help the metallic combination mould that the medium and small molecule of sulfidation is got rid of.Combine and insert, using can be at metal surface film forming and the releasing agent sticking with the liquid polysulfide fluid sealant, as multiple material FREKOTE series releasing agent.The preferred high temperature resistant releasing agent FREKOTE48NC of present embodiment forms barrier film, drying and forming-film with its surface that is applied in the metal die die cavity.Simultaneously, mixing liquid polysulfide fluid sealant, with the liquid polysulfide fluid sealant is mixing finish after, get rid of the air entrain into.The even paint of liquid polysulfide fluid sealant has been coated in the die cavity of metal die of releasing agent and film forming, has filled full metallic combination mold cavity along a direction, and have slightly unnecessary.By the nut screwing clamping pressurization bolt on the mould, apply certain pressure for the metallic combination mould, mould is fitted.By the gap structure that the splicing of metallic combination mould is inserted, extrude unnecessary liquid polysulfide fluid sealant glue.At room temperature, dock to liquid polysulfide sealing gelling.Preferably low, as far as possible near room temperature vulcanization to liquid polysulfide fluid sealant gel.Send into the baking oven firing equipment then, the sulfuration of heating, the oven temperature accelerated cure can raise.After sulfuration finishes, open the formpiston former of metallic combination mould, mold removal is inserted, demoulding pickup.
Claims (5)
1. a liquid polysulfone seal glue mould forming process comprises the steps:
(1) molding prepares a metallic combination mould with gap structure;
(2) separant coating, with can be in the metal surface film forming, and the releasing agent sticking with the liquid polysulfide fluid sealant, evenly apply on above-mentioned metallic combination mold cavity surface;
(3) gluing, the liquid polysulfide fluid sealant is mixing, get rid of the air that entrains into, and in the die cavity of the metallic combination mould of even paint film forming;
(4) exert pressure, assembling die is applied certain pressure, mould is fitted, extrude unnecessary glue;
(5) sulfuration to gel state, is put into the room temperature vulcanization of liquid polysulfide fluid sealant then firing equipment and is heated drying and forming-film;
(6) demoulding, sulfuration is opened mould, demoulding pickup after finishing.
2. liquid polysulfone seal glue mould forming process as claimed in claim 1 is characterized in that, described metallic combination mould is the formula splicing construction mould of inserting.
3. liquid polysulfone seal glue mould forming process as claimed in claim 1 is characterized in that, described releasing agent is a FREKOTE series releasing agent.
4. liquid polysulfone seal glue mould forming process as claimed in claim 3 is characterized in that, preferred high temperature resistant releasing agent FREKOTE 48NC or FREKOTE 44NC,
5. liquid polysulfone seal glue mould forming process as claimed in claim 3, it is characterized in that, in step (3), the liquid polysulfide fluid sealant is filled full metallic combination mold cavity avoiding entraining into air along direction, and unnecessary contraction when tasting press cure with benefit is arranged slightly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100506899A CN101204840A (en) | 2007-12-04 | 2007-12-04 | Liquid polysulfone seal glue mould forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100506899A CN101204840A (en) | 2007-12-04 | 2007-12-04 | Liquid polysulfone seal glue mould forming process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101204840A true CN101204840A (en) | 2008-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100506899A Pending CN101204840A (en) | 2007-12-04 | 2007-12-04 | Liquid polysulfone seal glue mould forming process |
Country Status (1)
| Country | Link |
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| CN (1) | CN101204840A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102658616A (en) * | 2012-02-10 | 2012-09-12 | 云南震安减震技术有限公司 | Simple method for determining vulcanization degree of large-diameter thick laminated rubber product |
| CN104136189A (en) * | 2012-01-05 | 2014-11-05 | 约翰逊控制技术公司 | Systems and methods for sealed cast metal molds |
| CN104476805A (en) * | 2014-12-25 | 2015-04-01 | 常熟市金马模具有限公司 | Metal combination die |
-
2007
- 2007-12-04 CN CNA2007100506899A patent/CN101204840A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104136189A (en) * | 2012-01-05 | 2014-11-05 | 约翰逊控制技术公司 | Systems and methods for sealed cast metal molds |
| CN102658616A (en) * | 2012-02-10 | 2012-09-12 | 云南震安减震技术有限公司 | Simple method for determining vulcanization degree of large-diameter thick laminated rubber product |
| CN104476805A (en) * | 2014-12-25 | 2015-04-01 | 常熟市金马模具有限公司 | Metal combination die |
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