CN204249193U - A kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board - Google Patents
A kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board Download PDFInfo
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- CN204249193U CN204249193U CN201420690160.9U CN201420690160U CN204249193U CN 204249193 U CN204249193 U CN 204249193U CN 201420690160 U CN201420690160 U CN 201420690160U CN 204249193 U CN204249193 U CN 204249193U
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- concave
- gland
- ptfe
- polytetrafluoroethylene
- core
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Abstract
The utility model provides a kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board, comprise upper pressing core, press down core, molding sleeve and pedestal, upper pressing core comprises the gland and cylinder boss that are integrally formed, gland is the cylinder that floor space diameter is identical with pressing down core, gland lower end is located at by boss, the upper center of gland is provided with the stressed concave surface of arc, can avoid upper pressing core unbalance stress when pressurizeing.The advantage that the utility model has and good effect are: the production technology simplifying polytetrafluoroethylene (PTFE) circular groove plate, better hold the concentricity of product, enhance productivity, economize in raw materials simultaneously, reduce production cost.
Description
Technical field
The utility model belongs to concave-board and processing technique field thereof, especially relates to a kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board.
Background technology
Polytetrafluoroethylmaterial material has excellent high and low temperature resistance and chemical stability, good electrical insulation capability, non-adhesive, weatherability, anti-flammability and good self-lubricating property, in chemical industry, oil, the field acquisition extensive use such as electric, medical and mechanical.Polytetrafluoroethylene (PTFE) concave-board make use of corrosion resistance and the non-stick nature of polytetrafluoroethylmaterial material, can be widely used in chemical industry anti-corrosion pipeline, and the height of concave-board is 100 ~ 300mm, outside diameter is 150 ~ 350mm, indent circular diameter is 50 ~ 200mm.But because conventional polytetrafluoroethylene (PTFE) concave-board is formed by the machined of polytetrafluoroethylene (PTFE) tabular section bar, manufacturing process is loaded down with trivial details, raw material input amount is large, and production cost is high, and process consumption is large, causes unnecessary waste.Application number is the patent " mould for molding teflon tank section bar " of 201020111746.7, in process of production not easy-formation, and the bad assurance of concentricity of product, product output qualification rate is lower.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of yield rate that significantly can improve product, thus reduces the mould for the production of polytetrafluoroethylene (PTFE) concave-board of production cost.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board, comprise upper pressing core, press down core, molding sleeve and pedestal, described pedestal is fixed on molding sleeve lower end, the inner chamber of molding sleeve is cylinder, upper pressing core fits tightly in molding sleeve, and slide up and down in molding sleeve, press down core sealing and be located at molding sleeve bottom, upper pressing core comprises the gland and cylinder boss that are integrally formed, gland is the cylinder that floor space diameter is identical with pressing down core, gland lower end is located at by boss, the cross section of boss is concentric with the cross section of gland, the floor space of boss is less than the floor space of gland, the upper center of gland is provided with the stressed concave surface of arc, upper pressing core unbalance stress when pressurizeing can be avoided.
Further, the thickness in the middle part of described upper pressing core is greater than and presses down core.Upper pressing core can produce larger impulsive force, is more conducive to the moulding of product.
Further, the thickness in the middle part of described upper pressing core is 1/4 ~ 1/3 of molding sleeve height.
Further, the edge of described boss lower surface is fillet.The edge of the bottom portion of groove of product is made to be fillet.
The advantage that the utility model has and good effect are: the production technology that not only simplify polytetrafluoroethylene (PTFE) circular groove plate, better hold the concentricity of product, enhance productivity, economize in raw materials simultaneously, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the external structure schematic diagram of mould of the present utility model;
Fig. 2 is the internal cross section figure of mould of the present utility model;
Fig. 3 is the front view of described upper pressing core;
Fig. 4 is the top view of described upper pressing core;
Fig. 5 presses down the front view of core described in being;
In figure: 1-upper pressing core; 11-gland; 12-boss; 2-presses down core; 3-molding sleeve; 4-pedestal; The stressed concave surface of 5-arc; 6-concave-board molding.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.
As shown in Fig. 1 ~ 5, a kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board, comprise upper pressing core 1, press down core 2, molding sleeve 3 and pedestal 4, pedestal 4 is fixed on molding sleeve 3 lower end, and be fixed on press base, the inner chamber of molding sleeve 3 is cylinder, upper pressing core 1 fits tightly in molding sleeve 3, and slide up and down in molding sleeve 3, press down core 2 sealing and be located at molding sleeve 3 bottom, upper pressing core 1 comprises the gland 11 and cylinder boss 12 that are integrally formed, gland 11 is the cylinder that floor space diameter is identical with pressing down core 2, gland 11 lower end is located at by boss 12, the cross section of boss 12 is concentric with the cross section of gland 11, the floor space of boss 12 is less than the floor space of gland 11, the upper center of gland 11 is provided with the stressed concave surface 5 of arc.Thickness in the middle part of upper pressing core 1 is greater than and presses down core 2, and the thickness in the middle part of upper pressing core 1 is 1/4 ~ 1/3 of molding sleeve 3 height.The edge of boss 12 lower surface is fillet.
Embodiment 1
Utilize above-mentioned mould to prepare a method for polytetrafluoroethylene (PTFE) concave-board, the height of concave-board product is 50mm, and polytetrafluoroethylsuspending suspending resin chosen by raw material, comprises the following steps:
1) polytetrafluoroethylsuspending suspending resin is added in molding sleeve 3, upper pressing core 1 is installed, and pressurizes downwards, pre-molding is carried out to polytetrafluoroethylsuspending suspending resin, pressure 20MPa, first time pressurize 8s;
2) pressurize downwards after terminating pressurize, pressure reaches 70MPa, carries out second time pressurize, pressurize 10s again;
3) pressurize downwards after terminating pressurize, pressure 110MPa, carries out third time pressurize, pressurize 20s, and pressurize terminates rear depanning, makes cylinder shape groove template die casting die 6 again;
4) concave-board molding 6 is put into sintering furnace to sinter, sintering process adopts staged to heat up, and within 20 hours, is warming up to 315 DEG C, is incubated 6 hours, then was warming up to 370 DEG C with 5 hours, be incubated 10 hours;
5) adopt staged to lower the temperature again, be cooled to 315 DEG C with 10 hours, be incubated 10 hours, be down to room temperature with 20 hours again after insulation terminates, make polytetrafluoroethylene (PTFE) concave-board.
Embodiment 2
Utilize above-mentioned mould to prepare a method for polytetrafluoroethylene (PTFE) concave-board, the height of concave-board product is 80mm, and polytetrafluoroethylsuspending suspending resin chosen by raw material, comprises the following steps:
1) polytetrafluoroethylsuspending suspending resin is added in molding sleeve 3, upper pressing core 1 is installed, and pressurizes downwards, pre-molding is carried out to polytetrafluoroethylsuspending suspending resin, pressure 25MPa, first time pressurize 8s;
2) pressurize downwards after terminating pressurize, pressure reaches 80MPa, carries out second time pressurize, pressurize 10s again;
3) pressurize downwards after terminating pressurize, pressure 120MPa, carries out third time pressurize, pressurize 25s, and pressurize terminates rear depanning, makes cylinder shape groove template die casting die 6 again;
4) concave-board molding 6 is put into sintering furnace to sinter, sintering process adopts staged to heat up, and within 20 hours, is warming up to 317 DEG C, is incubated 8 hours, then was warming up to 380 DEG C with 5 hours, be incubated 10 hours;
5) adopt staged to lower the temperature again, be cooled to 317 DEG C with 10 hours, be incubated 5 hours, be down to room temperature with 20 hours again after insulation terminates, make polytetrafluoroethylene (PTFE) concave-board.
Embodiment 3
Utilize above-mentioned mould to prepare a method for polytetrafluoroethylene (PTFE) concave-board, the height of concave-board product is 60mm, and polytetrafluoroethylsuspending suspending resin chosen by raw material, comprises the following steps:
1) polytetrafluoroethylsuspending suspending resin is added in molding sleeve 3, upper pressing core 1 is installed, and pressurizes downwards, pre-molding is carried out to polytetrafluoroethylsuspending suspending resin, pressure 27MPa, first time pressurize 10s;
2) pressurize downwards after terminating pressurize, pressure reaches 50MPa, carries out second time pressurize, pressurize 20s again;
3) pressurize downwards after terminating pressurize, pressure 50MPa, carries out third time pressurize, pressurize 17s, and pressurize terminates rear depanning, makes cylinder shape groove template die casting die 6 again;
4) concave-board molding 6 is put into sintering furnace to sinter, sintering process adopts staged to heat up, and within 5 hours, is warming up to 312 DEG C, is incubated 4 hours, then was warming up to 374 DEG C with 2 hours, be incubated 1 hour;
5) adopt staged to lower the temperature again, be cooled to 312 DEG C with 8 hours, be incubated 6 hours, be down to room temperature with 11 hours again after insulation terminates, make polytetrafluoroethylene (PTFE) concave-board.
Embodiment 4
Utilize above-mentioned mould to prepare a method for polytetrafluoroethylene (PTFE) concave-board, the height of concave-board product is 100mm, and polytetrafluoroethylsuspending suspending resin chosen by raw material, comprises the following steps:
1) polytetrafluoroethylsuspending suspending resin is added in molding sleeve 3, upper pressing core 1 is installed, and pressurizes downwards, pre-molding is carried out to polytetrafluoroethylsuspending suspending resin, pressure 11MPa, first time pressurize 9s;
2) pressurize downwards after terminating pressurize, pressure reaches 60MPa, carries out second time pressurize, pressurize 5s again;
3) pressurize downwards after terminating pressurize, pressure 100MPa, carries out third time pressurize, pressurize 15s, and pressurize terminates rear depanning, makes cylinder shape groove template die casting die 6 again;
4) concave-board molding 6 is put into sintering furnace to sinter, sintering process adopts staged to heat up, and within 19 hours, is warming up to 305 DEG C, is incubated 7 hours, then was warming up to 376 DEG C with 1 hour, be incubated 2 hours;
5) adopt staged to lower the temperature again, be cooled to 305 DEG C with 1 hour, be incubated 1 hour, be down to room temperature with 5 hours again after insulation terminates, make polytetrafluoroethylene (PTFE) concave-board.
Embodiment 5
Utilize above-mentioned mould to prepare a method for polytetrafluoroethylene (PTFE) concave-board, the height of concave-board product is 90mm, and polytetrafluoroethylsuspending suspending resin chosen by raw material, comprises the following steps:
1) polytetrafluoroethylsuspending suspending resin is added in molding sleeve 3, upper pressing core 1 is installed, and pressurizes downwards, pre-molding is carried out to polytetrafluoroethylsuspending suspending resin, pressure 4MPa, first time pressurize 5s;
2) pressurize downwards after terminating pressurize, pressure reaches 45MPa, carries out second time pressurize, pressurize 10s again;
3) pressurize downwards after terminating pressurize, pressure 80MPa, carries out third time pressurize, pressurize 5s, and pressurize terminates rear depanning, makes cylinder shape groove template die casting die 6 again;
4) concave-board molding 6 is put into sintering furnace to sinter, sintering process adopts staged to heat up, and within 17 hours, is warming up to 300 DEG C, is incubated 2 hours, then was warming up to 379 DEG C with 3 hours, be incubated 9 hours;
5) adopt staged to lower the temperature again, be cooled to 300 DEG C with 15 hours, be incubated 8 hours, be down to room temperature with 15 hours again after insulation terminates, make polytetrafluoroethylene (PTFE) concave-board.
Above 5 embodiments of the present utility model have been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model application range change and improve, and all should still belong within patent covering scope of the present utility model.
Claims (4)
1. the mould for the production of polytetrafluoroethylene (PTFE) concave-board, it is characterized in that: comprise upper pressing core (1), press down core (2), molding sleeve (3) and pedestal (4), described pedestal (4) is fixed on molding sleeve (3) lower end, the inner chamber of molding sleeve (3) is cylinder, upper pressing core (1) fits tightly in molding sleeve (3), and slide up and down in molding sleeve (3), press down core (2) sealing and be located at molding sleeve (3) bottom, upper pressing core (1) comprises the gland (11) and cylinder boss (12) that are integrally formed, gland (11) with press down core (2) for the identical cylinder of floor space diameter, gland (11) lower end is located at by boss (12), the cross section of boss (12) is concentric with the cross section of gland (11), the floor space of boss (12) is less than the floor space of gland (11), the upper center of gland (11) is provided with the stressed concave surface of arc (5).
2. the mould for the production of polytetrafluoroethylene (PTFE) concave-board according to claim 1, is characterized in that: the thickness at described upper pressing core (1) middle part is greater than and presses down core (2).
3. the mould for the production of polytetrafluoroethylene (PTFE) concave-board according to claim 2, is characterized in that: the thickness at described upper pressing core (1) middle part is 1/4 ~ 1/3 of molding sleeve (3) height.
4. the mould for the production of polytetrafluoroethylene (PTFE) concave-board according to any one of claims 1 to 3, is characterized in that: the edge of described boss (12) lower surface is fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420690160.9U CN204249193U (en) | 2014-11-17 | 2014-11-17 | A kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420690160.9U CN204249193U (en) | 2014-11-17 | 2014-11-17 | A kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board |
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| Publication Number | Publication Date |
|---|---|
| CN204249193U true CN204249193U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420690160.9U Expired - Fee Related CN204249193U (en) | 2014-11-17 | 2014-11-17 | A kind of mould for the production of polytetrafluoroethylene (PTFE) concave-board |
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| CN (1) | CN204249193U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325587A (en) * | 2014-11-17 | 2015-02-04 | 天津市天塑滨海氟塑料制品有限公司 | Mold for producing polytetrafluoroethylene groove plate and preparation method of groove plate |
-
2014
- 2014-11-17 CN CN201420690160.9U patent/CN204249193U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325587A (en) * | 2014-11-17 | 2015-02-04 | 天津市天塑滨海氟塑料制品有限公司 | Mold for producing polytetrafluoroethylene groove plate and preparation method of groove plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20211117 |