GB1170245A - Method for the Manufacture of Hemispherically-Shaped Articles from Sheet Material. - Google Patents

Method for the Manufacture of Hemispherically-Shaped Articles from Sheet Material.

Info

Publication number
GB1170245A
GB1170245A GB1245566A GB1245566A GB1170245A GB 1170245 A GB1170245 A GB 1170245A GB 1245566 A GB1245566 A GB 1245566A GB 1245566 A GB1245566 A GB 1245566A GB 1170245 A GB1170245 A GB 1170245A
Authority
GB
United Kingdom
Prior art keywords
radius
sheet
cavities
plugs
hemispheres
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
GB1245566A
Inventor
James Jones-Hinton
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.)
Dunlop Rubber Co Ltd
Original Assignee
Dunlop Rubber Co Ltd
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 Dunlop Rubber Co Ltd filed Critical Dunlop Rubber Co Ltd
Priority to GB1245566A priority Critical patent/GB1170245A/en
Priority to FR1553694D priority patent/FR1553694A/fr
Priority to CH415167A priority patent/CH470954A/en
Publication of GB1170245A publication Critical patent/GB1170245A/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
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
    • B29C51/06—Combined thermoforming and prestretching, e.g. biaxial stretching using pressure difference for prestretching
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

1,170,245. Sheet forming. DUNLOP CO. Ltd. 14 March, 1967 [22 March, 1966], No. 12455/66. Heading B5A. Hemispheres, for use in the subsequent production of table-tennis balls, are formed from a heat softened thermoplastic sheet 10 by first partially sucking the sheet into hemispherical cavities 32 and then subsequently fully forming the sheet by means of hemispherical plugs 20. In a first alternative, the radius of the cavities 32 correspond exactly to the desired outer radius of the hemispheres to be produced, and the radius of the plugs 20 correspond exactly to the internal radius. Upon advance of the plugs into the cavities the sheet is thus effectively drawn between matched dies. In a second alternative, the radius of the cavities 32 are larger than the external radius of the desired hemispheres and the radius of the plugs once again correspond exactly to the internal radius. In this case, the sheet is sucked into the plugs upon full penetration into the cavities.
GB1245566A 1966-03-22 1966-03-22 Method for the Manufacture of Hemispherically-Shaped Articles from Sheet Material. Expired GB1170245A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1245566A GB1170245A (en) 1966-03-22 1966-03-22 Method for the Manufacture of Hemispherically-Shaped Articles from Sheet Material.
FR1553694D FR1553694A (en) 1966-03-22 1967-03-22
CH415167A CH470954A (en) 1966-03-22 1967-03-22 A method of producing a hemispherically shaped plastic article

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1245566A GB1170245A (en) 1966-03-22 1966-03-22 Method for the Manufacture of Hemispherically-Shaped Articles from Sheet Material.

Publications (1)

Publication Number Publication Date
GB1170245A true GB1170245A (en) 1969-11-12

Family

ID=10004925

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1245566A Expired GB1170245A (en) 1966-03-22 1966-03-22 Method for the Manufacture of Hemispherically-Shaped Articles from Sheet Material.

Country Status (3)

Country Link
CH (1) CH470954A (en)
FR (1) FR1553694A (en)
GB (1) GB1170245A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2656071A1 (en) * 1976-12-10 1978-06-22 Multivac Hagenmueller Kg Moulding thermoplastic film without weakening corners - by drawing partly to shape and heating by contact with hot mould
CN1058659C (en) * 1997-05-19 2000-11-22 钱嘉禾 Production process of soft inflated balloon with printed pattern and its special equipment
EP1367438A2 (en) * 2002-05-31 2003-12-03 Tohoku Pioneer Corporation Insulating resin film and method of forming fine patterns of insulating resin film
WO2015021138A1 (en) * 2013-08-06 2015-02-12 Celanese International Corporation Cellulose acetate table tennis balls and processes for making
EP2669071A4 (en) * 2011-01-28 2016-11-02 Calsonic Kansei Corp Vacuum molding method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2656071A1 (en) * 1976-12-10 1978-06-22 Multivac Hagenmueller Kg Moulding thermoplastic film without weakening corners - by drawing partly to shape and heating by contact with hot mould
CN1058659C (en) * 1997-05-19 2000-11-22 钱嘉禾 Production process of soft inflated balloon with printed pattern and its special equipment
EP1367438A2 (en) * 2002-05-31 2003-12-03 Tohoku Pioneer Corporation Insulating resin film and method of forming fine patterns of insulating resin film
EP1367438A3 (en) * 2002-05-31 2006-07-12 Tohoku Pioneer Corporation Insulating resin film and method of forming fine patterns of insulating resin film
EP2669071A4 (en) * 2011-01-28 2016-11-02 Calsonic Kansei Corp Vacuum molding method
WO2015021138A1 (en) * 2013-08-06 2015-02-12 Celanese International Corporation Cellulose acetate table tennis balls and processes for making

Also Published As

Publication number Publication date
CH470954A (en) 1969-04-15
FR1553694A (en) 1969-01-17

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