Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1997-06-12
1998-11-17
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164312, 164900, B22D 1700, B22D 1710
Patent
active
058363726
ABSTRACT:
An injection molding system for a metal alloy includes a feeder in which the metal alloy is melted and a barrel in which the liquid metal alloy is converted into a thixotropic state. An accumulation chamber draws in the metal alloy in the thixotropic state through a valve disposed in an opening between the barrel and the accumulation chamber. The valve selectively opens and closes the opening in response to a pressure differential between the accumulation chamber and the barrel. After the metal alloy in the thixotropic state is drawn in, it is injected through an exit port provided on the accumulation chamber. The exit port has a variable heating device disposed around it. This heating device cycles the temperature near the exit port between an upper limit and a lower limit. The temperature is cycled to an upper limit when the metal alloy in the thixotropic state is injected and to a lower limit when the metal alloy in the thixotropic state is drawn into the accumulation chamber from the barrel.
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Lin Kuang Y.
Takata Corporation
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