Abstract: A heater for the injection nozzle of a die casting machine includes a mounting block which is clamped to the nozzle and has a cavity for receiving an off-the-shelf electric cartridge heater. The mounting block includes a casing formed from a high strength material such as steel and a quantity of a second material having a high thermal conductivity such as copper encased in the casing. A hole sized to receive the injection nozzle is formed through the block and passes through the second material so that the second material forms a portion of the inner surface of the hole. The heater cavity extends into the block along an axis generally perpendicular to the hole such that the second material forms a portion of the inner surface of the hole. The quantity of second material connects the two holes and forms a heat conductive path between the heater receiving hole and the nozzle receiving hole.

Abstract: A nozzle assembly for delivering molten metal to a die casting mold comprises a relatively large diameter cylindrical main body section, a relatively small diameter inlet tip section, and a relatively small diameter outlet tip section. Separate heater elements are wrapped around the respective sections and a controller functions to maintain set point body temperatures in each nozzle section in response to signals received from thermocouples separately associated with each nozzle section.