Method for making mold inserts

Details Method for making mold inserts Method for making mold inserts

1996-06-14

1998-01-13

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Stereolithographic shaping from liquid precursor

264227, B29C 3340, B29C 3508, B29C 4102

Patent

active

057075786

ABSTRACT:
A method for preparing plastic injection mold inserts capable of forming a three-dimensional article in a plastic injection molding process. The method includes (a) forming a master mold insert having a recess therein which has a shape which is complementary to at least a portion of the shape of the three-dimensional article; (b) preparing a temporary reverse mold of the master mold insert; (c) positioning a metal gate in the reverse mold adjacent to and in contact with the article form; (d) introducing a hardenable plastic resin into the reverse mold; (e) allowing the resin to harden to form a mold insert; and (f) removing the mold insert from the reverse mold.

REFERENCES:
patent: 4844144 (1989-07-01), Murphy et al.
patent: 5435959 (1995-07-01), Williamson et al.
patent: 5439622 (1995-08-01), Pennisi et al.
patent: 5562846 (1996-10-01), McKeen

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