Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1986-05-01
1987-12-01
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
164 15, 164 44, 164520, 164521, 264220, 264225, 264299, 264337, 264342R, 264343, 264DIG78, B29C 3340, B29C 3942
Patent
active
047103345
ABSTRACT:
A method of preparing a template for a product from a sample of the product. The ultimate template is either larger or smaller in size than the sample. Initially, a mixture of liquid rubber and a curing agent is prepared. The sample is then covered with the mixture and the mixture is permitted to harden to form a temporary mold. The sample is then removed from the mold to form a cavity, and the size of the cavity in the mold is altered to either increase or decrease its dimensions. Finally, a hardenable material, such as an epoxy resin, is poured into the mold to form the template. If an enlarged template is to be formed, the size of the cavity of the mold is increased by immersing the mold in an organic solvent bath. If the size of the mold is to be decreased, an organic solvent is added to the mixture before formation of the mold, and after the mold has been formed, it is heated to shrink the size of the mold.
REFERENCES:
patent: 1998896 (1935-04-01), Kay
patent: 2114162 (1938-04-01), Beal
patent: 2170919 (1939-08-01), Thener
patent: 2793399 (1957-05-01), Gallay et al.
patent: 3222443 (1965-12-01), Dames, Jr. et al.
patent: 4006207 (1977-02-01), Yeshin
Advanced Tool Technology, Inc.
Tentoni Leo B.
Thurlow Jeffery
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