Method of molding a perforated article

Details Method of molding a perforated article Method of molding a perforated article

1981-05-29

1983-08-30

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

With reshaping or surface embossing of formed article

264120, 264109, B29J 500

Patent

active

044016158

ABSTRACT:
A method of molding a perforated article involves supplying a formable material to a preforming chamber where the material is compressed so that it substantially assumes the cross-sectional shape of the preforming chamber. The formable material is then transferred under compressive forces to a molding chamber, which has a volume less than the volume of the preforming chamber and a shape which substantially matches the shape of the perforated article to be molded. The formable material is then heated in the molding chamber to cure it and thereby form the perforated article.

REFERENCES:
patent: 2571334 (1951-10-01), Browne
patent: 3238281 (1966-03-01), Kato
patent: 3261897 (1966-07-01), Munk
patent: 3342917 (1967-09-01), Laskiewicz

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