Title:
【発明の名称】成形プラスチック容器を作る方法
Document Type and Number:
Japanese Patent JPH10501481
Kind Code:
A
Abstract:
A polyethylene terephthalate (PET) preform (11) having a capped cylindrical body (13), a threaded top and collared neck (19) is preheated to soften the PET. The preform (11) is placed in a split mold (26) whose walls are heated to a temperature between 150 DEG C and 177 DEG C. A stretch rod (35), inserted through the top of the preform (11), stretches the preform (11) axially until the preform is the length of the final product (49). The preform (11) is expanded using compressed ambient air, and is molded against the walls (27, 29) of the mold (26). The air is vented, and dry nitrogen at a temperature below -50 DEG C is injected into the molded preform (47) to purge and cool the molded preform (47) while maintaining pressure of at least 520 kPag. The molded preform (47) is held against the mold (36) to anneal the inner and outer surfaces of the molded preform (47). The nitrogen supply is shut off and the final product (49) is released from the mold (26).
Inventors:
Rapman, kart, h, shinier
Application Number:
JP52942096A
Publication Date:
February 10, 1998
Filing Date:
March 07, 1996
Export Citation:
Assignee:
Rapman, kart, h, shinier
International Classes:
B29C49/12; B29C49/46; B29C49/48; B29C49/60; B29C49/66; B29C49/06; B29C49/58; (IPC1-7): B29C49/12; B29C49/60
Attorney, Agent or Firm:
Sanada Yuzo (2 outside)