Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article
Patent
1993-02-18
1999-10-26
Ortiz, Angela
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing multilayer work or article
264138, 264250, 264259, 264276, 264294, B29C 4318, B29C 4514, B29C 5110
Patent
active
059722789
ABSTRACT:
A method of forming a synthetic resin formed article having a double-layer structure of a base portion and a covering portion which covers an outer periphery of the base portion and which has an inwardly curved portion for covering an end portion of the base portion. The method includes the steps of forming a sheet-like material into a predetermined shape by the vacuum forming to obtain a preliminary covering portion; trimming an end portion of the preliminary covering portion obtained in the previous step to obtain the covering portion of the formed article; setting the covering portion of the formed article on one of a pair of dies which constitute a press-type forming die with the curved portion of the covering portion being supported by a slide core located at a forefront position; setting a molten resin which is forming material of the base portion into a gap between the one die and the other die in a state in which the covering portion of the formed article is being set on the one die; clamping the press-type forming die in a state wherein the slide core is in contact with the other die at the forefront position immediately after or in synchronism with the molten resin setting step and causing the molten resin to set to form it; and opening the forming die and then removing the formed article obtained in the clamping step from the press-type forming die.
REFERENCES:
patent: 4307058 (1981-12-01), Morello et al.
Ando Hikaru
Ito Keizo
Kato Takashi
Sakaida Shoji
Ortiz Angela
Toyoda Gosei Co,., Ltd.
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