B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 21/04 (2006.01)
Patent
CA 2164759
The invention provides a method of making a metal door frame for a currency- operated commercial machine. The method comprises the steps of: passing predetermined relative amounts of metals to form a predetermined thixotropic-metal alloy into a temperature controlled barrel of a screw extruder; heating the metals under high shear-rate mixing to a semi-solid state to form a thixotropic mixture of said metals; injecting the thixotropic mixture of metals at high speed into a mold of the desired shape of the metal door frame; and cooling the mixture in the mold and ejecting the cooled mixture from the mold in the form of a net- shape door frame.
Inventronics Limited
Kent & Edgar
LandOfFree
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