Method and apparatus of controlling temperature of injection pre

Details Method and apparatus of controlling temperature of injection pre Method and apparatus of controlling temperature of injection pre

1997-12-15

1999-08-24

Timm, Catherine

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Electro-static or inductive field

425526, 264403, 264457, 264478, 264486, 264535, B29C 4964

Patent

active

059422599

ABSTRACT:
A preform heating method for heating a preform for a stretch blow molding is executed by an apparatus which comprises an outer heating die having a cavity for the preform, a thermal-insulating pot surrounding the outer heating die and a high-frequency heating unit installed around to the thermal-insulating pot. The heating of the preformed is executed by locating the heating die around the preform, applying alternating magnetic flux to the heating die to heat the preform through the heating die, and controlling the magnitude of the alternating magnetic flux to control the temperature of the preform.

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patent: 4590021 (1986-05-01), Ota et al.
patent: 5180893 (1993-01-01), Sugiyama et al.
patent: 5611987 (1997-03-01), Kato et al.

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