Title:
【発明の名称】吹込み成形方法及びその装置
Document Type and Number:
Japanese Patent JP2002527257
Kind Code:
A
Abstract:
The invention relates to a method and apparatus for blow moulding. In the blow moulding apparatus, an extruder (1) feeds material into a connecting channel (9) to form an annular parison. The annular parison is fed into a mould and air is blown into the parison. In the connecting channel (9) there is a regulating cavity (10) with a variable volume, the volume being regulated by moving a regulating piston (11) of the apparatus back and forth. When increasing the volume of the regulating cavity (10), more material is left in said regulating cavity (10), the exit flow decreases and thus the wall of an article becomes slightly thinner. When contracting the regulating cavity (10), more material is extruded from the apparatus, and the wall of the article to be manufactured becomes thicker.
Inventors:
Kirjabinen, Cali
Application Number:
JP2000575674A
Publication Date:
August 27, 2002
Filing Date:
October 11, 1999
Export Citation:
Assignee:
Nextrom Holding S.A.
International Classes:
B29C48/09; B29C48/325; B29C48/33; B29C48/92; B29C49/04; B29C49/22; (IPC1-7): B29C49/04; B29C47/22; B29C47/24; B29C47/92
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)