Document Type and Number:
Japanese Patent JPH0560411
Kind Code:
B2
Abstract:
A hollow body (e.g. a container) as well as a method and an apparatus for its manufacture in which an axially directed wall of the body primarily is made of oriented and/or crystallized plastics material. A tubular preform (10d) is fixed in a circumferential region (13d) in the vicinity of the mouth edge (14d) of the preform between mechanical forming devices (30,40), after which the devices, during continued clamping of the circumferential region, are displaced in the axial direction of the preform relative to a mandrel (50). Thus, the mandrel is displaced into the preform during simultaneous expansion thereof and the material is oriented and/or crystallized. In a preferred embodiment there is made a certain compensation of the stretching forces, which arise in the material when inserting the mandrel, by applying a force to the bottom of the preform by a bottom support (75).
Inventors:
NILSSON TORSTEN (SE)
Application Number:
JP50039786A
Publication Date:
September 02, 1993
Filing Date:
December 09, 1985
Export Citation:
Assignee:
PLM AB
International Classes:
B29C49/08; B29C49/18; B29C49/48; B29C49/64; B29C49/76; B29C51/08; B29C55/26; B29C55/30; B29C57/00; B29L22/00; (IPC1-7): B29C49/08; B29C49/64; B29C55/26
Next Patent: JPH0560412