Method for simultaneous injection and compression

Details Method for simultaneous injection and compression Method for simultaneous injection and compression

1995-06-08

1999-10-19

Aftergut, Karen

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

2642978, 2643287, 2643288, 2643289, 26432811, 26432812, 26432813, B29C 4500

Patent

active

059684399

ABSTRACT:
Method and apparatus for molding an article by forming an oversized mold cavity with respect to opposing relatively movable mold members, introducing material into the oversized mold cavity and applying force to the mold members to reduce the volume of the cavity and compress the material simultaneously with its introduction into the mold cavity. The result is simultaneous injection and compression of material by contrast with the prior art of simultaneous injection and volume reduction, where compression does not take place until after injection has been completed.

REFERENCES:
patent: 4828769 (1989-05-01), Maus et al.

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