Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1985-05-06
1987-03-17
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
264223, 2643281, 425175, 425542, B29C 3340
Patent
active
046506250
ABSTRACT:
The invention relates to a method for forming an article by injection molding, such as a shoe, and comprises the formation of a mold (5) by coating a master pattern of the article with a pourable, heat-resistant molding compound, such as an epoxy resin or polyurethane. The master mold (5) so formed is secured in a mold casing (1) for an injection molding plant and molding material such as poly-vinyl chloride or polyurethane is injected to form the finished article. The master mold may be formed directly in the mold casing (1) to which it can be secured such as by mechanical securing and located means (6,7,8,) or by being adhered thereto. In an alternative embodiment of the invention, the master mold may be formed in a mold box and subsequently fitted into the mold casing (1) for reproduction of the article.
REFERENCES:
patent: 2968840 (1961-01-01), Morse
patent: 3101065 (1963-08-01), Kalis
patent: 3632278 (1972-01-01), Hall
patent: 3850902 (1974-11-01), Metcalfe et al.
patent: 4006207 (1977-02-01), Yeshin
patent: 4324748 (1982-04-01), Hatakeyama et al.
patent: 4451416 (1984-05-01), Burtscher
Pyon Harold Y.
Silbaugh Jan
Stylo Matchmakers Intl., Ltd.
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