Method of producing a resin mold for rear projection screen

Details Method of producing a resin mold for rear projection screen Method of producing a resin mold for rear projection screen

1988-12-15

1990-08-14

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Including step of mold making

264102, 264227, B29C 3340, B29C 3342, B29D 1100

Patent

active

049485377

ABSTRACT:
A method of producing a resin mold that includes the steps of pouring a first resin into a metal mold, curing the first resin at a first temperature thereby making an intermediate resin mold made of the first resin, separating the intermediate resin mold from the metal mold, pouring a second resin into the intermediate resin mold, curing the second resin at a second temperature thereby making a final resin mold made of the second resin and separating the final resin mold from the intermediate resin mold, wherein by selecting the first and second curing temperatures of the first and second resins, the final resin mold will have the same size as that of the metal mold.

REFERENCES:
patent: 4170616 (1979-10-01), Jebens
patent: 4770824 (1988-09-01), Blom

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