GB1284397A - Improvements in or relating to the manufacture of pneumatic tyres - Google Patents
Improvements in or relating to the manufacture of pneumatic tyresInfo
- Publication number
- GB1284397A GB1284397A GB4932768A GB4932768A GB1284397A GB 1284397 A GB1284397 A GB 1284397A GB 4932768 A GB4932768 A GB 4932768A GB 4932768 A GB4932768 A GB 4932768A GB 1284397 A GB1284397 A GB 1284397A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- cam
- temperature
- tyre
- rate
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
1284397 Moulding tyres DUNLOP HOLDINGS Ltd 16 Oct 1969 [17 Oct 1968] 49327/68 Heading B5A An uncured pneumatic tyre is inserted into a mould having a tread pattern moulding matrix and initially heated for a predetermined period to reduce the viscosity of at least part of the tread rubber whilst applying little or no pressure to the tyre interior, and then applying pressure to the tyre interior up to the full moulding pressure and continuing to heat at least the said part of the tread rubber so as to cause it gradually to flow into said matrix. The temperature of the tread rubber, the pressure of the tyre interior and/or the rate of increase of either may be varied according to a predetermined programme; such pressure and temperature values may be sensed continuously to detect any variation from the programme and any required correction applied. Alternatively the etread rubber temperature and/or rate of increase thereof is sensed and the pressure of the tyre interior and/or rate of increase thereof adjusted according to such sensing. The programming apparatus may include a cam-shaft with a cam controlling the said pressure and a second cam the said temperature; the former cam controls the operation of valves or pumps controlling pressurizing fluid flow and the latter cam the flow of current to an electric heater. Alternatively the said temperature control may include one or more thermocouples embedded in the mould matrix which produce voltages which are compared with voltages tapped from variable resistances associated with the aforementioned cams; an error voltage is amplified to adjust an associated valve or pump.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4932768A GB1284397A (en) | 1968-10-17 | 1968-10-17 | Improvements in or relating to the manufacture of pneumatic tyres |
| IE137769A IE33591B1 (en) | 1968-10-17 | 1969-10-03 | Improvements in or relating to the manufacture of pneumatic tyres |
| CA064208A CA923804A (en) | 1968-10-17 | 1969-10-06 | Manufacture of pneumatic tyres |
| FR6935292A FR2020903A1 (en) | 1968-10-17 | 1969-10-15 | |
| DE19691952439 DE1952439C3 (en) | 1968-10-17 | 1969-10-17 | Method and apparatus for manufacturing a pneumatic tire with a deep tread pattern |
| MY7400148A MY7400148A (en) | 1968-10-17 | 1974-12-31 | Improvements in or relating to the manufacture of pneumatic tyres |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4932768A GB1284397A (en) | 1968-10-17 | 1968-10-17 | Improvements in or relating to the manufacture of pneumatic tyres |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1284397A true GB1284397A (en) | 1972-08-09 |
Family
ID=10451973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4932768A Expired GB1284397A (en) | 1968-10-17 | 1968-10-17 | Improvements in or relating to the manufacture of pneumatic tyres |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA923804A (en) |
| DE (1) | DE1952439C3 (en) |
| FR (1) | FR2020903A1 (en) |
| GB (1) | GB1284397A (en) |
| IE (1) | IE33591B1 (en) |
| MY (1) | MY7400148A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA733465B (en) * | 1972-06-08 | 1974-04-24 | Firestone Tire & Rubber Co | Pneumatic tires and their manufacture |
| JPS59220322A (en) * | 1983-05-30 | 1984-12-11 | Kazumasa Sarumaru | Preheating method of green tire |
| JPS61222730A (en) * | 1985-03-28 | 1986-10-03 | Sumitomo Rubber Ind Ltd | Manufacture of tire |
| IT1259599B (en) * | 1992-07-01 | 1996-03-20 | Firestone Int Dev Spa | METHOD FOR THE PRODUCTION OF ROAD VEHICLE TIRES. |
-
1968
- 1968-10-17 GB GB4932768A patent/GB1284397A/en not_active Expired
-
1969
- 1969-10-03 IE IE137769A patent/IE33591B1/en unknown
- 1969-10-06 CA CA064208A patent/CA923804A/en not_active Expired
- 1969-10-15 FR FR6935292A patent/FR2020903A1/fr not_active Withdrawn
- 1969-10-17 DE DE19691952439 patent/DE1952439C3/en not_active Expired
-
1974
- 1974-12-31 MY MY7400148A patent/MY7400148A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1952439A1 (en) | 1970-04-30 |
| IE33591L (en) | 1970-04-17 |
| MY7400148A (en) | 1974-12-31 |
| DE1952439C3 (en) | 1979-02-01 |
| DE1952439B2 (en) | 1978-05-24 |
| IE33591B1 (en) | 1974-08-21 |
| FR2020903A1 (en) | 1970-07-17 |
| CA923804A (en) | 1973-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |