Patent ID: 7121321

Claim:
An injection unit for a hot-chamber die-casting machine, comprising: an injection portion having a gooseneck and a nozzle adapter, the injection portion having a base portion at an end of the gooseneck adapted to receive a molten medium supply, a nozzle at an end of the nozzle adapter adapted to inject the molten medium supply in a die cavity, a channel between the base portion and the nozzle adapted for conveying the molten medium supply therethrough, and a piston chamber in the base portion actuatable to draw the molten medium supply therein and to direct the molten medium supply in the channel for injection into said die cavity; an actuation portion connected to the gooseneck to actuate the piston chamber; slots in the injection portion along the channel; sleeves each received in one of the slots in the injection portion adjacent to the channel; and heating cartridges each accommodated in one of the sleeves to control a temperature of the molten medium supply in the channel, such that any one of the heating cartridges is removed from the injection portion by removing the sleeve accommodating the heating cartridge.