04828783 is referenced by 4 patents and cites 24 patents.

In the production of hollow bodies from oriented thermoplastic material, a cylindrical portion of a heated hollow preform is stretched, with a simultaneous reduction in the wall thickness thereof, at a starting temperature below the vitreous transition temperature of the material. A mandrel is positioned in the preform to support it during stretching, the outside diameter of the mandrel corresponding to the inside diameter of the preform. Directly before the mandrel is inserted into the preform the preform is subjected to re-alignment to adapt at least the cross-sectional shape of the mouth opening of the preform to the cross-section of the mandrel. The re-aligning operation is effected by inserting the preform into a sleeve adjoining a drawing ring for carrying out the stretching operation.

Title
Process and apparatus for producing hollow bodies from thermoplastic material
Application Number
7/10944
Publication Number
4828783
Application Date
February 5, 1987
Publication Date
May 9, 1989
Inventor
Hermann Werner
Hamburg
DE
Klaus Vogel
Barsbuttel
DE
Wolfgang Reymann
Hamburg
DE
Peter Albrecht
Hamburg
DE
Agent
Panitch Schwarze Jacobs and Nadel
Assignee
Krupp Corpoplast Maschinenbau
DE
IPC
B29C 55/30
B29C 55/22
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