GB1394879A - Process and apparatus for moulding an embossed pattern on the peripheral band of a toroidal article in particular on tyre treads - Google Patents
Process and apparatus for moulding an embossed pattern on the peripheral band of a toroidal article in particular on tyre treadsInfo
- Publication number
- GB1394879A GB1394879A GB5653772A GB5653772A GB1394879A GB 1394879 A GB1394879 A GB 1394879A GB 5653772 A GB5653772 A GB 5653772A GB 5653772 A GB5653772 A GB 5653772A GB 1394879 A GB1394879 A GB 1394879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- section
- segments
- tyre
- article
- 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0605—Vulcanising presses characterised by moulds integral with the presses having radially movable sectors
-
- 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0645—Devices for inserting vulcanising cores, i.e. bladders, into the tyres; Closing the press in combination herewith
-
- 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0645—Devices for inserting vulcanising cores, i.e. bladders, into the tyres; Closing the press in combination herewith
- B29D2030/0647—Supporting or transferring tyres using an assembly of a bladder and side rings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
1394879 Moulding tyres INDUSTRIE PIRELLI SpA 7 Dec 1972 [17 Dec 1971 20 Oct 1972] 56537/72 Heading B5A In a method of moulding an embossed pattern on the peripheral band of a toroidal article, e.g. on the tread of a tyre, in which the article is pressurized internally by a vulcanizing fluid whilst being vulcanized in a mould, the mould comprises opposed article sidewall moulding sections and a number of radially movable segments which press the peripheral band of the article ; with the mould in the fully closed position one or more of the mould parts are elastically deformed to apply force to the segments thereby counteracting the pressure of the vulcanizing fluid tending to move the segments radially outwardly. The tyre mould of Fig. 1 includes sidewall mould sections 22, 23, radially movable tread segments 20 with inclined surfaces 4 engaged by surfaces of an annular section 3 secured to a frame 5 detachably attached to a plate 10. The section 23 is attached to a cover 12 which, in the mould closed position shown, is locked to an annular housing 8 by a rotatable ring 13 with lugs 14 engaging below lugs 15. In the mould open position, Fig. 2, a tyre and a vulcanizing chamber 51 on a supporting device 49 is lowered into the mould which has its section 22 and segments 20 raised above the frame 5 by rods 26. The cover and section 23 are lowered to contact the tyre and a rod 36 is raised whereupon an annular groove 40 at its upper end is locked to the cover by half-rings 41. The rod 36 is lowered to force the mould assembly downwardly thereby causing the segments to be urged radially inwardly by the section 3. The circumferentially spaced end faces of the adjacent segments are brought into contact and the section 3 is elastically deformed radially outwardly by the time the mould plate 25 contacts the frame 5. Hence a pressure is applied between the contacting end faces of adjacent segments so that the pressure of vulcanizing fluid supplied to the tyre interior does not separate the faces to produce flash. Deformation of the section 3 is adjusted by washers 7a. After disconnecting the rod 36 from the cover the mould may be released from the plate 10 and placed on a further support where it is supplied with vulcanizing fluid at high temperature and pressure via passages 17, 32 and 53. In a modification, instead of supplying vulcanizing fluid to the section 3 and to chambers 31 the mould assembly is located within a housing supplied with such fluid.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT3252671A IT944055B (en) | 1971-12-17 | 1971-12-17 | PROCEDURE AND DEVICE FOR STAM PARE A DRAWING IN RELIEF ON THE PERIMETER FACE OF A TOROIDAL ARTICLE IN PARTICULAR ON THE BATTI ROAD OF TIRE COVERS |
IT3071172A IT1044852B (en) | 1972-10-20 | 1972-10-20 | Moulding tyre treads - using forces produced by elastic deformation of mould sections |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1394879A true GB1394879A (en) | 1975-05-21 |
Family
ID=26328889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5653772A Expired GB1394879A (en) | 1971-12-17 | 1972-12-07 | Process and apparatus for moulding an embossed pattern on the peripheral band of a toroidal article in particular on tyre treads |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS4867375A (en) |
AR (1) | AR201188A1 (en) |
BE (1) | BE792783A (en) |
CA (1) | CA1010618A (en) |
DE (1) | DE2261094A1 (en) |
ES (1) | ES410228A1 (en) |
FR (1) | FR2163750B1 (en) |
GB (1) | GB1394879A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004009337A1 (en) * | 2002-07-24 | 2004-01-29 | Bridgestone/Firestone North American Tire, Llc | Segmented tire mold to reduce flash |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1561223A (en) * | 1976-07-19 | 1980-02-13 | Caterpillar Tractor Co | Mould body for use in a method of forming a tread pattern on a tyre |
JP2505675B2 (en) * | 1992-01-24 | 1996-06-12 | 三菱重工業株式会社 | Tire vulcanizing press |
JP3004552B2 (en) * | 1994-12-22 | 2000-01-31 | 三菱重工業株式会社 | Tire vulcanizer |
JP5682019B1 (en) * | 2014-04-16 | 2015-03-11 | Hmc合同会社 | Tire vulcanizing apparatus and tire vulcanizing method |
-
0
- BE BE792783D patent/BE792783A/en unknown
-
1972
- 1972-12-07 GB GB5653772A patent/GB1394879A/en not_active Expired
- 1972-12-11 AR AR24558072A patent/AR201188A1/en active
- 1972-12-14 JP JP47124848A patent/JPS4867375A/ja active Pending
- 1972-12-14 DE DE19722261094 patent/DE2261094A1/en not_active Withdrawn
- 1972-12-15 CA CA158,940A patent/CA1010618A/en not_active Expired
- 1972-12-16 ES ES410228A patent/ES410228A1/en not_active Expired
- 1972-12-18 FR FR7245006A patent/FR2163750B1/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004009337A1 (en) * | 2002-07-24 | 2004-01-29 | Bridgestone/Firestone North American Tire, Llc | Segmented tire mold to reduce flash |
Also Published As
Publication number | Publication date |
---|---|
FR2163750B1 (en) | 1975-06-20 |
BE792783A (en) | 1973-03-30 |
ES410228A1 (en) | 1977-01-16 |
JPS4867375A (en) | 1973-09-14 |
AR201188A1 (en) | 1975-02-21 |
DE2261094A1 (en) | 1973-06-20 |
CA1010618A (en) | 1977-05-24 |
FR2163750A1 (en) | 1973-07-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |