GB1585593A - Flat gasket of impregnated material - Google Patents
Flat gasket of impregnated material Download PDFInfo
- Publication number
- GB1585593A GB1585593A GB1085078A GB1085078A GB1585593A GB 1585593 A GB1585593 A GB 1585593A GB 1085078 A GB1085078 A GB 1085078A GB 1085078 A GB1085078 A GB 1085078A GB 1585593 A GB1585593 A GB 1585593A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flange
- gasket
- impregnating agent
- coating
- compressible material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 title claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 11
- 239000010425 asbestos Substances 0.000 claims description 8
- 229910052895 riebeckite Inorganic materials 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 8
- 239000004945 silicone rubber Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000011253 protective coating Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 2
- 229920001194 natural rubber Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 238000007650 screen-printing Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229920003051 synthetic elastomer Polymers 0.000 claims description 2
- 229920005613 synthetic organic polymer Polymers 0.000 claims description 2
- 239000005061 synthetic rubber Substances 0.000 claims description 2
- 239000010409 thin film Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
- F16J15/123—Details relating to the edges of the packing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Description
(54) FLAT GASKET OF IMPREGNATED MATERIAL
(71) We, GOETZE A.G., formerly known as Goetzewerke Friedrich Goetze existing under the laws of the Federal
Republic of Germany, of Burgermeister
Schmidt-Strasse 17, 5093 Burscheid 1, Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to manufacture of a flat gasket, such as a cylinder head gasket, comprising at least one layer of compressible material having its sealing surface impregnated with an impregnating agent, the gasket having a through opening bounded by an enclosing flange of sheet metal.
Cylinder head gaskets of compressible material, such as asbestos, which may incorporate a metallic reinforcing plate, have their sealing surfaces impregnated in order to increase the strength and fluid-tighmess of the gasket.
In the case of cylinder head gaskets of compressible material for modern highly loaded engines, however, it is important that the compressible material possesses a relatively high yield point in those zones which are subjected to most stress by the applied sealing pressure, and these are the areas around the combustion chamber openings.
This is achieved by keeping these zones free from impregnating agent and thus in practice cylinder head gaskets according to German Laid-open Patent Specification 2 304 505 which are free from impregnating agents in the zone below the bordering flanges are in use.
These cylinder head gaskets are produced in a particularly simple manner in that the gaskets, which are pre-punched and provided with bordering flanges and consist of a layer of asbestos fibre reinforced with metal if necessary, are treated with the appropriate impregnating agent by rolling-on, immersion or spraying. In this relatively simple method, however, it may happen over and over again that impregnating agent is able to get below the bordering flange and, consequently, a relatively high number of rejected cylinder head gaskets with too low a yield point in the zone Ibelow the bordering flanges is produced in manufacture.
In accordance with the present invention there is provided a method of making a flat gasket comprising at least one layer of compressible material having its surface impregnated with an impregnating agent, the gasket having a through opening bounded by an enclosing flange of sheet metal, wherein the junction between the flange and the exposed surface of the compressible material is covered by a thin continuous protective coating such that the impregnating agent applied to the surface in a liquid state is prevented from penetrating into the compressible material enclosed by the flange.
In fact, it has been found on analysis of the problem in question that after the openings have been enclosed and the subsequent levelling of the flanges, the metal flange plates may spring up, so that a gap is formed between the end of the side of the flange and the surrounding layer of soft material.
The impregnating agent then penetrates through this gap into the zones below the bordering flanges to an increased extent during the following impregnating operation and cylinder head gaskets with enclosing plates which have sprung up in this way no longer possess the required high yield points and would become rejects. The gap possibly occurring as a result of the flange plate springing up is covered by the protective coating applied according to the invention and any inward flow of the impregnating agent is prevented. The entire surface of the metal flange may be covered. The adjacent layer of compressible material is coated at the most up to a width of 3 mm, so that on the one hand good anchorage of the coating and on the other hand as complete impregnation as possible of the remaining surface zones are still obtained.So that the coating does not break as a result of the stresses occurring on the flange plate springing up it is advantageous to make the coating of elastic material, preferably, therefore, rubber. The coating is therefore preferably produced from silicone rubber applied in a thin film by the screen printing method, the silicone rubber having at the same time a good resistance to the impregnating agent which can be used. As in German Laid-open Patent
Specification 2 304 505, completely poly merisable organic synthetic substances are preferably employed as impregnating agents.
The drawing is a section through the edge of a cylinder head gasket adjacent the combustion chamber, the gasket having a metal flange plate which has sprung up.
The gasket consists of a metal plate 3 covered with asbestos sheets 1,2. The edge of the gasket is enclosed by a flange 4 which has sprung up, so that a gap 5 has been created between the ends 6 of the sides of the flange and the adjacent layer of asbestos 7. A protective coating 8 consisting of silicone rubber about 0.1 mm thick covers approximately 4 mm of the margins 6 of the flange and the surface of the adjacent layer of asbestos 7 for a distance of 1 mm. The impregnating agent 9 has filled the pores of the remaining surface zones of the layer 10, penetrating to a depth of about one third of the thickness from each face of the gasket. The impregnating agent has also penetrated under the coating 8 up to a boundary 11 short of the edges of the margins 6 of the flange, so that the material enclosed by the flange 4 is free from the impregnating agent 9.
WIlAT WE CLAIM IS:- 1. A method of making a flat gasket comprising at least one layer of compressible material having its surface impregnated with an impregnating agent, the gasket having a through opening bounded by an enclosing flange of sheet metal, wherein the junction between the flange and the exposed surface of the compressible material is covered by a thin continuous protective coating such that the impregnating agent applied to the surface in a liquid state is prevented from penetrating into the compressible material enclosed by the flange.
2. A method as claimed in claim 1 in which the coating extends over the surface of the compressible material to a width of no more than 3 mm.
3. A method as claimed in claim 1 or 2 in which the coating is 0.1 to 0.3 mm thick and of elastic material.
4. A method as claimed in claim 3 in which the coating is of natural or synthetic rubber.
5. A method as claimed in claim 4 in which the coating is of silicone rubber.
6. A method as claimed in any of the preceding claims in which the impregnating agent is a synthetic organic polymer which is elastic or plastic in the fully-polymerised condition.
7. A method of making a cylinder head gasket substantially as described with reference to the accompanying drawing.
8. A gasket produced by the method of any of the preceding claims.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (8)
1. A method of making a flat gasket comprising at least one layer of compressible material having its surface impregnated with an impregnating agent, the gasket having a through opening bounded by an enclosing flange of sheet metal, wherein the junction between the flange and the exposed surface of the compressible material is covered by a thin continuous protective coating such that the impregnating agent applied to the surface in a liquid state is prevented from penetrating into the compressible material enclosed by the flange.
2. A method as claimed in claim 1 in which the coating extends over the surface of the compressible material to a width of no more than 3 mm.
3. A method as claimed in claim 1 or 2 in which the coating is 0.1 to 0.3 mm thick and of elastic material.
4. A method as claimed in claim 3 in which the coating is of natural or synthetic rubber.
5. A method as claimed in claim 4 in which the coating is of silicone rubber.
6. A method as claimed in any of the preceding claims in which the impregnating agent is a synthetic organic polymer which is elastic or plastic in the fully-polymerised condition.
7. A method of making a cylinder head gasket substantially as described with reference to the accompanying drawing.
8. A gasket produced by the method of any of the preceding claims.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772713542 DE2713542C2 (en) | 1977-03-28 | 1977-03-28 | Soft flat gasket, especially cylinder head gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1585593A true GB1585593A (en) | 1981-03-04 |
Family
ID=6004833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1085078A Expired GB1585593A (en) | 1977-03-28 | 1978-03-20 | Flat gasket of impregnated material |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2713542C2 (en) |
| FR (1) | FR2385955A1 (en) |
| GB (1) | GB1585593A (en) |
| IT (1) | IT1113792B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124309A (en) * | 1982-06-19 | 1984-02-15 | Sigri Elektrographit Gmbh | Cylinder head gasket for combustion engine |
| GB2215788A (en) * | 1988-02-12 | 1989-09-27 | Reinz Dichtungs Gmbh | Gasket seal |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2965527D1 (en) * | 1978-11-03 | 1983-07-07 | Engineering Components Ltd | Improvements in or relating to gaskets |
| IT1163873B (en) * | 1982-10-30 | 1987-04-08 | Lechler Elring Dichtungswerke | FLAT GASKET AND PROCEDURE FOR ITS MANUFACTURE |
| DE3528614A1 (en) * | 1985-08-09 | 1987-02-19 | Goetze Ag | FLAT GASKET, ESPECIALLY CYLINDER HEAD GASKET FOR COMBUSTION ENGINES |
| EP3290754B1 (en) | 2016-08-30 | 2023-06-14 | Frenzelit GmbH | Soft material seal with surround |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1750876A1 (en) * | 1968-06-14 | 1971-04-29 | Goetzewerke | Flat seal for internal combustion engines |
| DE2304505B2 (en) * | 1973-01-31 | 1977-03-03 | Goetzewerke Friedrich Goetze Ag, 5093 Burscheid | CYLINDER HEAD GASKET FOR COMBUSTION MACHINERY |
| DE2304592B2 (en) * | 1973-01-31 | 1976-01-15 | Goetzewerke Friedrich Goetze Ag, 5673 Burscheid | FLAT GASKET, IN PARTICULAR CYLINDER HEAD GASKET |
| DE2505136A1 (en) * | 1975-02-07 | 1976-08-19 | Goetzewerke | IMPRAEGNATED SOFT MATERIAL SEALING PLATE, IN PARTICULAR CYLINDER HEAD GASKET |
-
1977
- 1977-03-28 DE DE19772713542 patent/DE2713542C2/en not_active Expired
- 1977-11-18 FR FR7734757A patent/FR2385955A1/en active Granted
- 1977-11-29 IT IT3021277A patent/IT1113792B/en active
-
1978
- 1978-03-20 GB GB1085078A patent/GB1585593A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124309A (en) * | 1982-06-19 | 1984-02-15 | Sigri Elektrographit Gmbh | Cylinder head gasket for combustion engine |
| GB2215788A (en) * | 1988-02-12 | 1989-09-27 | Reinz Dichtungs Gmbh | Gasket seal |
| GB2215788B (en) * | 1988-02-12 | 1991-09-25 | Reinz Dichtungs Gmbh | Flat gasket and process for its production |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2713542A1 (en) | 1978-10-05 |
| FR2385955B1 (en) | 1983-05-27 |
| IT1113792B (en) | 1986-01-20 |
| DE2713542C2 (en) | 1982-12-02 |
| FR2385955A1 (en) | 1978-10-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |