Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Differential temperature conditioning
Patent
1983-08-24
1985-06-18
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Differential temperature conditioning
264520, 264532, 264535, B29C 1707
Patent
active
045240450
ABSTRACT:
This invention relates to a method of fabricating a bottle-shaped container of saturated polyester having superior mechanical strength, very low degrees of age and high temperature deformation, and superior dimensional stability. The piece for forming the bottle-shaped container is heated to an orientation temperature, is biaxially oriented in a blowing mold and is then thermally set by maintaining the outer wall surface of the expanded container in contact with the inner wall surface of the mold, which is kept at a temperature in the range between the glass transition point and the crystallization temperature, for longer than 5 seconds. The blowing mold is formed with the size adjusted in capacity by approx. 6% to allow for shrinkage of the product container when the container is exposed to a high temperature greater than 70.degree. C. and then left to stand, so as to thereby obtain a container of accurate capacity.
REFERENCES:
patent: 4385089 (1983-05-01), Bonnebat et al.
Haraguchi Kouichi
Hayashi Yoshiaki
Koshidaka Yukio
Silbaugh Jan
Yoshino Kogyosho Co. Ltd.
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