CN103552189A - Demolding method for pure silver conductive rubber - Google Patents
Demolding method for pure silver conductive rubber Download PDFInfo
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- CN103552189A CN103552189A CN201310468719.3A CN201310468719A CN103552189A CN 103552189 A CN103552189 A CN 103552189A CN 201310468719 A CN201310468719 A CN 201310468719A CN 103552189 A CN103552189 A CN 103552189A
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- polytetrafluoroethylene
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- ptfe
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Abstract
The invention discloses a demolding method for pure silver conductive rubber. Polytetrafluoroethylene with certain thickness is used as a mold release agent and sprayed on the surface of a mold to realize demolding of the pure silver conductive rubber. The method comprises the following steps: polishing of the mold; surface pretreatment; preparation of polytetrafluoroethylene; spraying of polytetrafluoroethylene; solidification of a sprayed coating; and retreatment of the surface of the mold. According to the invention, the sprayed polytetrafluoroethylene coating is used to replace a common mold release agent, so the problems of difficult molding and adherence of mold release agents during manufacturing of conductive rubber in the prior art are overcome, and product performance is well guaranteed.
Description
Technical field
The invention belongs to microelectronics spare and accessory parts and manufacture field, relate to a kind of release method of high-performance fine silver conductive rubber.
Background technology
Conductive rubber has good electromagnetic sealing and water vapor seal ability, under certain pressure, can provide good electric conductivity, extensive use in the fields such as electronics, telecommunications, electric power, military project, Aeronautics and Astronautics, naval vessel.In Aeronautics and Astronautics and other defence electronic component, very high to the performance requirement of conductive rubber, conventionally need to be from the conductive rubber of external Imported High-performance, this improves the production cost of product greatly, and the production cycle often can not meet user's demand.Along with China's economy and technology obtain tremendous development, the condition of high-performance conductive rubber production domesticization is ripe gradually.Common conductive rubber adopts carbon black, copper powder, aluminium powder, aluminium is silver-plated, copper is silver-plated etc. as filler, and in pressing process, product stripping ratio is easier to.And when manufacturing high-performance conductive rubber, adopt fine silver as filler, because silicon rubber mixes after silver powder, the adhesion phenomenon of itself and metal die steel is extremely serious, makes rubber-moulding difficulty very big, is difficult for the demoulding, adopt after common releasing agent, although can solve the problem of the demoulding, releasing agent is attached to surface of the work and cannot removes, and the properties of product of producing are reduced greatly.Therefore, for guaranteeing carrying out smoothly of high-performance fine silver conductive rubber localization, find a kind of effective release method, make the smooth demoulding of product, do not affect again the performance of product, become high-performance conductive rubber production producer and technical staff a great problem now.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of assurance product manufacture in the demoulding smoothly, do not affect again the performance of product, to guarantee that the production of domestic high-performance conductive rubber carries out smoothly, reduce microelectronics spare and accessory parts production cost, shorten part delivery cycle.
The present invention is mainly achieved by the following technical programs:
The release method of a kind of fine silver conductive rubber of the present invention, its by the certain thickness polytetrafluoroethylene (PTFE) of mould surface spraying as releasing agent, fine silver conductive rubber is carried out to the demoulding, its method step comprises: (1) mold polish; (2) surface preparation; (3) polytetrafluoroethylene (PTFE) preparation; (4) polytetrafluoroethylene (PTFE) spraying; (5) sprayed coating solidifies; (6) die surface is processed again;
Described step (1) is polished to roughness Ra 0.4 by mold work die cavity with abrasive paper for metallograph;
Described step (2), because mold materials is metallic steel, has a large amount of anti-corrosive greases in die cavity after processing assembling, must clean up, so must carry out alramenting oil removal treatment;
Described step (3) adopts coating 850314, curing agent VM7799 to mix with polytetrafluoroethylene (PTFE), according to proportioning (38～44): (34～40): (19～25), and stir and it was mixed in about 30 minutes with glass bar, then use 100 object strainer filtering impurity;
Described step (4) adopts 0.8mm spray gun, and air compressor machine pressure 0.2Mpa, apart from die surface 250mm, sprays the solution mixing perpendicular to mould direction, and during spraying, the long limit of spray gun direct of travel and mould is 75 degree angles, evenly spraying;
Described step (5) is put into baking oven by the mould that has sprayed polytetrafluoroethylene (PTFE), and 250～300 ℃ of heating-up temperatures keep 30min, and then powered-down, allows mould carry out cooling with stove;
Described step (6) is pushed wiping by the die surface after solidifying repeatedly with silk, makes its surface produce gloss.
Compared with prior art, the present invention is usingd polytetrafluoroethylene (PTFE), as releasing agent, fine silver conductive rubber is carried out to the demoulding, and moulding and stripping result are good, and the product surface of moulding is clean, no longer occur that releasing agent sticks to the situation on product, the quality and performance of product is guaranteed.
Accompanying drawing explanation
Fig. 1 is implementation step flow chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and concrete embodiment, come that the invention will be further described, but claimed scope is not only confined to done description.
Conductive rubber is comprised of a certain proportion of rubber, fine silver and adhesive, in mould in by higher temperature and pressure, compacting forms.For making the demoulding smoothly after formed product, must be at a kind of resistant to elevated temperatures releasing agent of mould surface spraying, this releasing agent can not stick on product.This method is as releasing agent at the certain thickness polytetrafluoroethylene (PTFE) of mould surface spraying.Because polytetrafluoroethylene (PTFE) is often known as " non-sticking lining ", it is a kind of artificial synthesized polymer material that has used fluorine to replace all hydrogen atoms in polyethylene.This material has the feature of antiacid alkali resistant, anti-various organic solvents, is dissolved in hardly all solvents.Meanwhile, polytetrafluoroethylene (PTFE) has resistant to elevated temperatures feature, and its coefficient of friction is extremely low.For this material and mould are combined, and the smooth demoulding of rubber now sums up a set of rational, effective method.
The release method of a kind of fine silver conductive rubber of the present invention, be by the certain thickness polytetrafluoroethylene (PTFE) of mould surface spraying as releasing agent, fine silver conductive rubber is carried out to the method for the demoulding.
Embodiment mono-
Its method step comprises: (1) mold polish; (2) surface preparation; (3) polytetrafluoroethylene (PTFE) preparation; (4) polytetrafluoroethylene (PTFE) spraying; (5) sprayed coating solidifies; (6) die surface is processed again;
Described step (1) is polished to roughness Ra 0.4 by mold work die cavity with abrasive paper for metallograph;
Described step (2), because mold materials is metallic steel, has a large amount of anti-corrosive greases in die cavity after processing assembling, must clean up, so must carry out alramenting oil removal treatment;
Described step (3) adopts coating 850314, curing agent VM7799 to mix with polytetrafluoroethylene (PTFE), according to proportioning 38:37:25, and stirs and it is mixed in about 30 minutes with glass bar, then uses 100 object strainer filtering impurity;
Described step (4) adopts 0.8mm spray gun, and air compressor machine pressure 0.2Mpa, apart from die surface 250mm, sprays the solution mixing perpendicular to mould direction, and during spraying, the long limit of spray gun direct of travel and mould is 75 degree angles, evenly sprays three times;
Described step (5) is put into baking oven by the mould that has sprayed polytetrafluoroethylene (PTFE), and 250 ℃ of heating-up temperatures keep 30min, and then powered-down, allows mould carry out cooling with stove;
Described step (6) is pushed wiping by the die surface after solidifying repeatedly with silk, makes its surface produce gloss.
Embodiment bis-
Its method step comprises: (1) mold polish; (2) surface preparation; (3) polytetrafluoroethylene (PTFE) preparation; (4) polytetrafluoroethylene (PTFE) spraying; (5) sprayed coating solidifies; (6) die surface is processed again;
Described step (1) is polished to roughness Ra 0.4 by mold work die cavity with abrasive paper for metallograph;
Described step (2), because mold materials is metallic steel, has a large amount of anti-corrosive greases in die cavity after processing assembling, must clean up, so must carry out alramenting oil removal treatment;
Described step (3) adopts coating 850314, curing agent VM7799 to mix with polytetrafluoroethylene (PTFE), according to proportioning 41:34:25, and stirs and it is mixed in about 30 minutes with glass bar, then uses 100 object strainer filtering impurity;
Described step (4) adopts 0.8mm spray gun, and air compressor machine pressure 0.2Mpa, apart from die surface 250mm, sprays the solution mixing perpendicular to mould direction, and during spraying, the long limit of spray gun direct of travel and mould is 75 degree angles, evenly sprays three times;
Described step (5) is put into baking oven by the mould that has sprayed polytetrafluoroethylene (PTFE), and 260 ℃ of heating-up temperatures keep 30min, and then powered-down, allows mould carry out cooling with stove;
Described step (6) is pushed wiping by the die surface after solidifying repeatedly with silk, makes its surface produce gloss.
Embodiment tri-
Its method step comprises: (1) mold polish; (2) surface preparation; (3) polytetrafluoroethylene (PTFE) preparation; (4) polytetrafluoroethylene (PTFE) spraying; (5) sprayed coating solidifies; (6) die surface is processed again;
Described step (1) is polished to roughness Ra 0.4 by mold work die cavity with abrasive paper for metallograph;
Described step (2), because mold materials is metallic steel, has a large amount of anti-corrosive greases in die cavity after processing assembling, must clean up, so must carry out alramenting oil removal treatment;
Described step (3) adopts coating 850314, curing agent VM7799 to mix with polytetrafluoroethylene (PTFE), according to proportioning 44:37:19, and stirs and it is mixed in about 30 minutes with glass bar, then uses 100 object strainer filtering impurity;
Described step (4) adopts 0.8mm spray gun, and air compressor machine pressure 0.2Mpa, apart from die surface 250mm, sprays the solution mixing perpendicular to mould direction, and during spraying, the long limit of spray gun direct of travel and mould is 75 degree angles, evenly sprays three times;
Described step (5) is put into baking oven by the mould that has sprayed polytetrafluoroethylene (PTFE), and 280 ℃ of heating-up temperatures keep 30min, and then powered-down, allows mould carry out cooling with stove;
Described step (6) is pushed wiping by the die surface after solidifying repeatedly with silk, makes its surface produce gloss.
Embodiment tetra-
Its method step comprises: (1) mold polish; (2) surface preparation; (3) polytetrafluoroethylene (PTFE) preparation; (4) polytetrafluoroethylene (PTFE) spraying; (5) sprayed coating solidifies; (6) die surface is processed again;
Described step (1) is polished to roughness Ra 0.4 by mold work die cavity with abrasive paper for metallograph;
Described step (2), because mold materials is metallic steel, has a large amount of anti-corrosive greases in die cavity after processing assembling, must clean up, so must carry out alramenting oil removal treatment;
Described step (3) adopts coating 850314, curing agent VM7799 to mix with polytetrafluoroethylene (PTFE), according to proportioning 39:40:21, and stirs and it is mixed in about 30 minutes with glass bar, then uses 100 object strainer filtering impurity;
Described step (4) adopts 0.8mm spray gun, and air compressor machine pressure 0.2Mpa, apart from die surface 250mm, sprays the solution mixing perpendicular to mould direction, and during spraying, the long limit of spray gun direct of travel and mould is 75 degree angles, evenly sprays three times;
Described step (5) is put into baking oven by the mould that has sprayed polytetrafluoroethylene (PTFE), and 300 ℃ of heating-up temperatures keep 30min, and then powered-down, allows mould carry out cooling with stove;
Described step (6) is pushed wiping by the die surface after solidifying repeatedly with silk, makes its surface produce gloss.
Claims (1)
1. a release method for fine silver conductive rubber, is characterized in that: by the certain thickness polytetrafluoroethylene (PTFE) of mould surface spraying as releasing agent, fine silver conductive rubber is carried out to the demoulding, its method step comprises: (1) mold polish; (2) surface preparation; (3) polytetrafluoroethylene (PTFE) preparation; (4) polytetrafluoroethylene (PTFE) spraying; (5) sprayed coating solidifies; (6) die surface is processed again;
Described step (1) is polished to roughness Ra 0.4 by mold work die cavity with abrasive paper for metallograph;
Described step (2), because mold materials is metallic steel, has a large amount of anti-corrosive greases in die cavity after processing assembling, must clean up, so must carry out alramenting oil removal treatment;
Described step (3) adopts coating 850314, curing agent VM7799 to mix with polytetrafluoroethylene (PTFE), according to proportioning (38～44): (34～40): (19～25), and stir and it was mixed in about 30 minutes with glass bar, then use 100 object strainer filtering impurity;
Described step (4) adopts 0.8mm spray gun, and air compressor machine pressure 0.2Mpa, apart from die surface 250mm, sprays the solution mixing perpendicular to mould direction, and during spraying, the long limit of spray gun direct of travel and mould is 75 degree angles, evenly spraying;
Described step (5) is put into baking oven by the mould that has sprayed polytetrafluoroethylene (PTFE), and 250～300 ℃ of heating-up temperatures keep 30min, and then powered-down, allows mould carry out cooling with stove;
Described step (6) is pushed wiping by the die surface after solidifying repeatedly with silk, makes its surface produce gloss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310468719.3A CN103552189A (en) | 2013-10-09 | 2013-10-09 | Demolding method for pure silver conductive rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310468719.3A CN103552189A (en) | 2013-10-09 | 2013-10-09 | Demolding method for pure silver conductive rubber |
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| CN103552189A true CN103552189A (en) | 2014-02-05 |
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| CN201310468719.3A Pending CN103552189A (en) | 2013-10-09 | 2013-10-09 | Demolding method for pure silver conductive rubber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542474B (en) * | 2016-03-15 | 2018-06-22 | 王雷 | A kind of silver-plated conductive rubber slab of aluminium and preparation method thereof |
| CN114953277A (en) * | 2022-06-15 | 2022-08-30 | 归壹生命科技(东莞)有限公司 | Foamed plastic self-skinning die and production process thereof |
-
2013
- 2013-10-09 CN CN201310468719.3A patent/CN103552189A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 贺靖勇: "特富龙喷涂工艺研究", 《中国包装工业》, no. 6, 30 June 2002 (2002-06-30), pages 76 - 78 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542474B (en) * | 2016-03-15 | 2018-06-22 | 王雷 | A kind of silver-plated conductive rubber slab of aluminium and preparation method thereof |
| CN114953277A (en) * | 2022-06-15 | 2022-08-30 | 归壹生命科技(东莞)有限公司 | Foamed plastic self-skinning die and production process thereof |
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Application publication date: 20140205 |
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