Method for controlling the temperature of a layer in contact wit

Details Method for controlling the temperature of a layer in contact wit Method for controlling the temperature of a layer in contact wit

1989-09-22

1993-08-10

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

264235, 264346, 264523, 425144, 425526, B29C 3302, B29C 3502, B29C 4964

Patent

active

052346374

ABSTRACT:
A method and apparatus for thermically processing a material, such as a plastic material made of PET, in contact with a very thin heating layer that is provided on a body, such as a blow-mold. The intensity of current supplied to the heating layer is controlled as a function of the medium temperature in the heating layer to allow the heating layer to very rapidly heat up the plastic material contacting the heating layer. After switching off the heating current the plastic material is rapidly cooled down to the temperature of the body carrying the heating layer. This process may be applied to the heat setting process of blow-molded hollow articles made of PET.

REFERENCES:
patent: 2979773 (1961-04-01), Bolstad
patent: 3039139 (1962-06-01), Nishioka et al.
patent: 3185432 (1962-01-01), Hager, Jr.
patent: 3789190 (1974-01-01), Orosy et al.
patent: 3866669 (1975-02-01), Gardner
patent: 4496131 (1985-01-01), Yang
patent: 4546239 (1985-10-01), Sugimori
patent: 4897028 (1990-01-01), Barancik et al.
patent: 5007818 (1991-04-01), Barancik et al.
JP 55 67417 A. In: Patents Abstracts of Japan, M-24, Aug. 5, 1980, vol. 4, No. 108 (1 Page).

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