GB1511444A - Method of reducing irregularities in tyres - Google Patents

Method of reducing irregularities in tyres

Info

Publication number
GB1511444A
GB1511444A GB748476A GB748476A GB1511444A GB 1511444 A GB1511444 A GB 1511444A GB 748476 A GB748476 A GB 748476A GB 748476 A GB748476 A GB 748476A GB 1511444 A GB1511444 A GB 1511444A
Authority
GB
United Kingdom
Prior art keywords
tyre
irregularity
green
green tyre
movements
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
Application number
GB748476A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebr Hofmann GmbH and Co KG Maschinenfabrik
Original Assignee
Gebr Hofmann GmbH and Co KG Maschinenfabrik
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gebr Hofmann GmbH and Co KG Maschinenfabrik filed Critical Gebr Hofmann GmbH and Co KG Maschinenfabrik
Publication of GB1511444A publication Critical patent/GB1511444A/en
Expired legal-status Critical Current

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
    • B29D30/0633—After-treatment specially adapted for vulcanising tyres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/30—Compensating imbalance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/30—Compensating imbalance
    • G01M1/34—Compensating imbalance by removing material from the body to be tested, e.g. from the tread of tyres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/02—Tyres
    • G01M17/022—Tyres the tyre co-operating with rotatable rolls
    • G01M17/024—Tyres the tyre co-operating with rotatable rolls combined with tyre surface correcting or marking means
    • 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
    • B29D30/0633—After-treatment specially adapted for vulcanising tyres
    • B29D2030/0634—Measuring, calculating, correcting tyre uniformity, e.g. correcting RFV
    • B29D2030/0637—Correcting by adding material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Balance (AREA)
  • Tyre Moulding (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

1511444 Reducing irregularities in tyres HOFMANN GmbH & CO KG MASCHINENFABRIK Gebr 25 Feb 1976 [18 March 1975] 7484/76 Heading B7C [Also in Division B3] A method of reducing an irregularity in a tyre comprises applying a measuring arrangement, e.g. movable drum 11, to "a green tyre" 1, determining the irregularity in the green tyre by measuring force variations, or movements, applied to the measuring arrangement and resulting from the irregularity, and effecting a correction operation on the green tyre in dependence on the angular location and magnitude of the measured force variations or movements. The correction operation may comprise adding material to, or removing material from, the shoulders or the whole tread of the green tyre, and the material removal may be effected by cutting means or by rotary grinding members 16, 17 mounted on pivoted arms 18, 19 and controlled synchronously or independently. The tyre may be inflated to 50% of its design pressure and the drum 11 pressed against the tyre with a pressure of 50% of the normal working load on the tyre. The "green tyre" is an unvulcanized new tyre or a retreaded tyre prior to vulcanizing the tread. After carrying out the above method, a remaining irregularity may be reduced by matching the high point or low point of the irregularity on the green tyre with the geometric low or high point of the tyre curing mould.
GB748476A 1975-03-18 1976-02-25 Method of reducing irregularities in tyres Expired GB1511444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752511881 DE2511881C2 (en) 1975-03-18 1975-03-18 Method for reducing or eliminating irregularities in motor vehicle tires

Publications (1)

Publication Number Publication Date
GB1511444A true GB1511444A (en) 1978-05-17

Family

ID=5941724

Family Applications (1)

Application Number Title Priority Date Filing Date
GB748476A Expired GB1511444A (en) 1975-03-18 1976-02-25 Method of reducing irregularities in tyres

Country Status (4)

Country Link
DE (1) DE2511881C2 (en)
FR (1) FR2304465A1 (en)
GB (1) GB1511444A (en)
IT (1) IT1055431B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004052633A1 (en) * 2002-12-09 2004-06-24 Societe De Technologie Michelin Method and apparatus for balancing tires during retreading
US20150183271A1 (en) * 2012-07-19 2015-07-02 Bridgestone Corporation Base tire manufacturing method and base tire
CN109716096A (en) * 2016-09-20 2019-05-03 株式会社神户制钢所 The rolling resistance evaluating apparatus of tire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952027C2 (en) * 1979-12-22 1983-07-07 Gebr. Hofmann Gmbh & Co Kg Maschinenfabrik, 6100 Darmstadt Method and device for improving the irregularities in motor vehicle tires
JP3241625B2 (en) * 1996-06-21 2001-12-25 住友ゴム工業株式会社 Tire manufacturing method and tire manufacturing apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004052633A1 (en) * 2002-12-09 2004-06-24 Societe De Technologie Michelin Method and apparatus for balancing tires during retreading
US7468111B2 (en) 2002-12-09 2008-12-23 Michelin Recherche Et Technique S.A. Method and apparatus for balancing tires during retreading
US20150183271A1 (en) * 2012-07-19 2015-07-02 Bridgestone Corporation Base tire manufacturing method and base tire
CN109716096A (en) * 2016-09-20 2019-05-03 株式会社神户制钢所 The rolling resistance evaluating apparatus of tire
CN109716096B (en) * 2016-09-20 2021-04-20 株式会社神户制钢所 Tire rolling resistance evaluation device
US11162872B2 (en) 2016-09-20 2021-11-02 Kobe Steel, Ltd. Device for evaluating tire rolling resistance

Also Published As

Publication number Publication date
FR2304465A1 (en) 1976-10-15
DE2511881C2 (en) 1978-03-30
DE2511881B1 (en) 1976-09-16
IT1055431B (en) 1981-12-21
FR2304465B1 (en) 1980-03-07

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee