Ultrahigh speed injection molding method

Details Ultrahigh speed injection molding method Ultrahigh speed injection molding method

1985-12-18

1989-01-10

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 405, 26432813, 26432816, 264102, 264571, 425546, B29C 4577

Patent

active

047972360

ABSTRACT:
A method for injection molding a material involving bringing the interior of a tightly sealed injection mold under a high vacuum, then injecting the material into the interior of the injection mold at an ultrahigh speed in the vicinity of a speed at which adiabatic change is exerted on the material in accordance with a predetermined pattern of internal pressure so as to fill the interior of the injection mold with the material, and molding the material under low pressure. An injection molding apparatus used for carrying out the aforementioned method is capable of bringing the interior of the injection mold to a high vacuum.

REFERENCES:
patent: 3919371 (1975-11-01), Jache
patent: 4366110 (1982-12-01), Morita et al.
patent: 4412804 (1983-11-01), Huther
Plastics Mold Engineering Handbook, DuBois and Pribble, Van Nostrand Reinhold Co., 1978, pp. 294-297, 420 and 575.

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