METHOD AND DEVICE FOR HEATING PREFORM - YOSHINO KOGYOSHO CO LTD

Title:

METHOD AND DEVICE FOR HEATING PREFORM

Document Type and Number:

WIPO Patent Application WO/2003/002329

Kind Code:

A1

Abstract:

A method of heating a preform, comprising the steps of applying a first heating processing of rapid heating to the preform formed on a bottle body by biaxial stretching blow by operating a heat source at a high output while blowing cooling air to the preform, applying a temperature controlling processing to reduce a temperature difference between the outer surface temperature and inner surface temperature of the preform to a specified value or below by leaving the heated preform as it is, and applying a second heating processing to the temperature controlled preform to heat the preform until the outer surface temperature is increased to a temperature slightly lower than the crystallization temperature of a PET while blowing cooling air to the preform, whereby the rapid heating of the preform can be safely achieved without causing overheating.

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Inventors:

MIYAZAWA HISASHI (JP)
UESUGI DAISUKE (JP)

Application Number:

PCT/JP2002/006316

Publication Date:

January 09, 2003

Filing Date:

June 25, 2002

Export Citation:

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Assignee:

YOSHINO KOGYOSHO CO LTD (JP)
MIYAZAWA HISASHI (JP)
UESUGI DAISUKE (JP)

International Classes:

B29B13/02; B29C49/64; B29C35/08; B29C35/16; B29C49/06; B29C49/68; B29K67/00; B29L23/00; (IPC1-7): B29C49/68

Foreign References:

US5326258A	1994-07-05
US4076071A	1978-02-28
JPH08142175A	1996-06-04
US4076071A	1978-02-28

Other References: