Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Composite or multiple layer
Patent
1995-09-26
1997-02-18
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Composite or multiple layer
264 27, 264163, 264102, 264325, 2643281, 425407, 425808, B29D 1100
Patent
active
056038712
ABSTRACT:
In an aging device used to manufacture a plastic molded product, injecting and aging processes are separated from each other. Namely, a plastic base material is approximately processed in advance in a final shape by injection molding. Thereafter, the plastic base material is inserted into an aging die having plural cavities and attached to a press machine such that the aging die is clamped and opened. Next, the plastic base material is heated and melted until a temperature equal to or higher than a glass transition point so as to generate an internal resin pressure. Next, the plastic base material is gradually cooled to transfer a mirror face thereto. The aging device has a die cooling device having plural heat pipes for cooling the die and has a die heating device having plural heaters for heating the die. The heat pipes and the heaters are arranged in a die plate of the press machine. In this aging device, the aging die can be uniformly and rapidly heated and cooled and a cooling speed of the aging die can be easily controlled.
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Hirano Akio
Ito Hidenori
Kanematsu Toshihiro
Koseko Hisaaki
Ohtani Wataru
Ricoh & Company, Ltd.
Vargot Mathieu D.
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