Method of making floor mats

Details Method of making floor mats Method of making floor mats

1997-09-08

2000-02-08

Silbaugh, Jan H

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264257, 264319, 264322, 264324, 264DIG65, 156312, B29D 3100

Patent

active

060225033

ABSTRACT:
Methods of making thermoplastic articles having integral projections extending from a surface thereof. The methods utilize a mold plate having a top side, an underside and a cavity extending from the top side to the underside for forming the integral projection. The methods utilize an air escape passage for allowing escape of air from the cavity in the mold plate during the pressing operation. At least a portion of the molding operation is conducted while the temperature of the entrance to the air escape passage is below the molding temperature of the thermoplastic material being molded.

REFERENCES:
patent: 4016318 (1977-04-01), DiGioia
patent: 4174991 (1979-11-01), Reuben
patent: 4332767 (1982-06-01), Kitanaka et al.
patent: 5154961 (1992-10-01), Reuben
patent: 5207963 (1993-05-01), Grace
H. Potente, J. Natrop, "Quality Assurance of Computer Controlled Hot-Tool Welding for Mass Production", Journal of Polymer Engineering and Science, Mid-Apr. 1991, vol. 31, No. 7, p. 519-525.

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