Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1979-10-19
1982-01-26
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
264222, 264227, 434 81, 434 86, B29C 102
Patent
active
043128262
ABSTRACT:
This invention relates to the method of producing a flexible, life-like model of physiological organs. These models are produced by injecting under pressure for a predetermined time a settable material such as silicone. The organ is then digested in a solution leaving a solid fabricated model. A multi-layered mold is fabricated around the solid model and once formed, is disassembled to remove said model. The mold is then reassembled and after proper coating is filled with liquid wax or similar material which is permitted to solidify. The mold is again disassembled and the wax model removed. The surface of the wax model can then be polished and otherwise cleaned prior to dipping in a settable liquid such as silicone which allows a build-up coating to be applied to such wax model. The thus coated model is then placed in boiling water or other environment to melt out the core to form a hollow casting by the lost wax technique. The remaining wax residue can be removed by use of an appropriate organic scavenger solution. In the case of lungs, heart and the like, the model can then be suspended within a suitable enclosure and through the application of an electronic controlled, alternating vacuum, respiration, heart beat or the like can be simulated.
REFERENCES:
patent: 2635294 (1953-04-01), Rolaston
patent: 3789518 (1974-02-01), Chase
patent: 3848346 (1974-11-01), Mackey
Czaja Donald E.
Thompson W.
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