Mold having opposed offset cooling channels

Details Mold having opposed offset cooling channels Mold having opposed offset cooling channels

1994-07-28

1996-03-26

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

264107, 26432816, 425552, 425810, B29C 4573

Patent

active

055015921

ABSTRACT:
In an injection mold having a cavity formed between opposing faces of a fixed mold and a movable mold for defining a shape of a product, and cooling channels formed in the fixed mold and the movable mold, respectively, for cooling resins injected into the cavity, cooling channels of the movable mold are formed at positions at least opposite to those where cooling channels of the fixed mold are not formed, thereby obtaining an injection mold capable of securing uniformity of optical properties of the obtained molded article, such as birefringence and causing no deterioration of mechanical properties of the molded article such as a deflection even when a cooling time is shortened in order to increase cycle of the injection molding.

REFERENCES:
patent: 1582704 (1926-04-01), Sylvester et al.
patent: 4185955 (1980-01-01), Holmes et al.
patent: 4462780 (1984-07-01), Stavitsky et al.
Patent Abstracts of Japan, vol. 11, No. 336, JP-A-62 117 716.
Patent Abstracts of Japan, vol. 13, No. 528, JP-A-01 216 807.
Patent Abstracts of Japan, vol. 16, No. 218, JP-A-04 040 643.

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