Plastic molds and methods of producing same

Details Plastic molds and methods of producing same Plastic molds and methods of producing same

1997-06-19

1998-09-15

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Stereolithographic shaping from liquid precursor

249134, 264236, 264308, 522 71, 522 76, 522 90, 522 96, 525404, 525450, B29C 3508, B29C 4102

Patent

active

058075194

ABSTRACT:
A plastic mold is produced by first repeating the process of forming a layer of a photocurable resin composition of a specified kind and exposing it to actinic radiation to at least partially photocure it to produce a photocured layered structure having a glass transition temperature of 70.degree.-120.degree. C. This structure is then subjected to a post-cure process at a temperature high than the glass transition temperature by 30.degree.-100.degree. C. Plastic molds made by this method have superior heat distortion temperature and tensile elastic modulus.

REFERENCES:
patent: 5510066 (1996-04-01), Fink et al.
patent: 5591563 (1997-01-01), Suzuki et al.

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