Injection moulding and casting method and apparatus

Details Injection moulding and casting method and apparatus Injection moulding and casting method and apparatus

B - Operations, Transporting

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D

22/67

B22D 17/04 (2006.01) B22D 17/02 (2006.01) B29C 45/46 (2006.01)

Patent

CA 1228464

ABSTRACT A method of injection moulding or casting comprises forcing a solid bar of the material to be moulded or cast as a plunger into a closed heating chamber having a discharge opening. The heating chamber is maintained at a temperature above the melting or plasticizing temperature of the moulding or casting material so that the leading end of the bar on entering the chamber melts or plasticizes therein and displaces molten or plasticized material from the chamber through the discharge opening. Apparatus comprises a body member formed with a heating chamber and a straight passage leading into the chamber, a plunger formed of the material to be moulded or cast being slidable in the passage. A thermal barrier may divide the passage into two successive portions.

471235

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