Controlled casting of a shrinkable material

Details Controlled casting of a shrinkable material Controlled casting of a shrinkable material

1990-11-01

1992-05-19

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 13, 264 14, 264 17, 264 25, 264259, 264327, B29C 3510, B29C 3910, B29D 1100

Patent

active

051146320

ABSTRACT:
A method and a device are disclosed wherein a shrinkable polymer material is formed in situ in a mold without defects and with no internal stresses. A monomer or polymer solution is injected into the mold and solidified sequentially through the mold by exposure to an agent such as ultraviolet radiation, with simultaneous addition of monomer or polymer solution into the area of the mold not yet exposed to the solidifying agent. By controlling the rate at which the solidifying agent is moved across the mold and the monomer or polymer solution is injected into the mold, the resulting product completely fills the mold and is stressfree.

REFERENCES:
patent: 4798690 (1989-01-01), Levy
patent: 4873029 (1989-10-01), Blum
patent: 4919850 (1990-04-01), Blum et al.
patent: 4983335 (1991-01-01), Matsuo et al.

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