SE8203780L - WANT TO MANUFACTURE A PTFE SEAL AND CONNECT SUCH A SEAL WITH A SEALER - Google Patents
WANT TO MANUFACTURE A PTFE SEAL AND CONNECT SUCH A SEAL WITH A SEALERInfo
- Publication number
- SE8203780L SE8203780L SE8203780A SE8203780A SE8203780L SE 8203780 L SE8203780 L SE 8203780L SE 8203780 A SE8203780 A SE 8203780A SE 8203780 A SE8203780 A SE 8203780A SE 8203780 L SE8203780 L SE 8203780L
- Authority
- SE
- Sweden
- Prior art keywords
- seal
- filler
- layer
- ptfe
- washed out
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3665—Moulds for making articles of definite length, i.e. discrete articles cores or inserts, e.g. pins, mandrels, sliders
- B29C2043/3668—Moulds for making articles of definite length, i.e. discrete articles cores or inserts, e.g. pins, mandrels, sliders destructible or fusible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/251—Particles, powder or granules
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Sealing Devices (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Gasket Seals (AREA)
- Sealing Material Composition (AREA)
Abstract
In the production of multi-layer PTFE seals to be held in a valve closing element or a valve seat, pure PTFE powder is compacted in a first compacting operation for a first, thin covering layer (34) forming the sealing surface of the seal. A mixture (33) of PTFE powder and a filler which can be washed out is then compacted by a second compacting operation to form a region, which is rubber-elastic due to its porous nature, of a second layer situated at the bottom during use. The whole is then sintered. After the sintering process, the filler is washed out. The thickness of the bottom layer in the compacted state is about four times the particle size of the filler, which is about 0.25 to 0.5 mm, while the covering layer is at least 0.3 mm thick. The PTFE powder to be mixed with a filler which can be washed out can be electrostatically discharged prior to mixing. <IMAGE>
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772710613 DE2710613A1 (en) | 1977-03-11 | 1977-03-11 | METHOD OF MANUFACTURING A SEAL FROM PTFE AND CONNECTING SUCH A SEAL TO A SEALING CARRIER |
Publications (1)
Publication Number | Publication Date |
---|---|
SE8203780L true SE8203780L (en) | 1982-06-18 |
Family
ID=6003349
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7712822A SE426037B (en) | 1977-03-11 | 1977-11-14 | SET TO MANUFACTURE A SEAL OF PTFE |
SE8203780A SE8203780L (en) | 1977-03-11 | 1982-06-18 | WANT TO MANUFACTURE A PTFE SEAL AND CONNECT SUCH A SEAL WITH A SEALER |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7712822A SE426037B (en) | 1977-03-11 | 1977-11-14 | SET TO MANUFACTURE A SEAL OF PTFE |
Country Status (6)
Country | Link |
---|---|
CH (2) | CH639738A5 (en) |
DE (1) | DE2710613A1 (en) |
FR (1) | FR2383003A1 (en) |
GB (1) | GB1592517A (en) |
IT (1) | IT1088830B (en) |
SE (2) | SE426037B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3657051B1 (en) | 2018-11-21 | 2021-06-30 | W.L. Gore & Associates, Inc. | Sealing element and method of manufacture of a sealing element |
CN110103353B (en) * | 2019-05-10 | 2021-09-14 | 张福军 | Preparation method of polytetrafluoroethylene composite sand filtering pipe |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB792012A (en) * | 1953-12-10 | 1958-03-19 | Us Gasket Company | Cementable polytetrafluoroethylene and the method of making articles thereof cementable |
GB811818A (en) * | 1957-04-12 | 1959-04-15 | Manning Maxwell & Moore Inc | Improvements in or relating to pressure-operated electric switches |
US3514314A (en) * | 1967-04-10 | 1970-05-26 | Rdm Inc | Method for coating polytetrafluoroethylene on material |
DE2050433A1 (en) * | 1970-10-14 | 1972-04-20 | Uhde Gmbh Friedrich | Process for the production of insulators from moldable plastics |
-
1977
- 1977-03-11 DE DE19772710613 patent/DE2710613A1/en not_active Ceased
- 1977-11-14 SE SE7712822A patent/SE426037B/en not_active IP Right Cessation
- 1977-12-15 IT IT3075277A patent/IT1088830B/en active
- 1977-12-15 GB GB5222277A patent/GB1592517A/en not_active Expired
-
1978
- 1978-01-24 FR FR7801872A patent/FR2383003A1/en active Granted
- 1978-03-08 CH CH253278A patent/CH639738A5/en not_active IP Right Cessation
-
1981
- 1981-09-28 CH CH623981A patent/CH646500A5/en not_active IP Right Cessation
-
1982
- 1982-06-18 SE SE8203780A patent/SE8203780L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
FR2383003B1 (en) | 1983-08-19 |
SE426037B (en) | 1982-12-06 |
DE2710613A1 (en) | 1978-09-14 |
SE7712822L (en) | 1978-09-12 |
IT1088830B (en) | 1985-06-10 |
CH646500A5 (en) | 1984-11-30 |
CH639738A5 (en) | 1983-11-30 |
GB1592517A (en) | 1981-07-08 |
FR2383003A1 (en) | 1978-10-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 8203780-5 |