The utility model discloses a kind of
casting runner lower injection
pipe heater devices, it is related to
foundry technical field, including support and preheating device;Preheating device includes gas
nozzle, jet
pipe and fire collecting hood respectively fixed on support;Gas
nozzle is fixed on support, and is connected with
gas supply device, its gas outlet direction is vertically upwards;Jet
pipe cover is located outside gas
nozzle and vertically extends upwards, its bottom is provided with the air inlet of intercommunication outside, its top is provided with jet port;Fire collecting hood cover is located outside jet pipe and vertically extends upwards, its height is higher than the height of jet pipe, and its top heat port is located at the bottom of injection pipe.By support preheating device, the gas nozzle of preheating device, jet pipe and fire collecting hood cooperate, can effectively preheat
casting runner lower injection pipe, avoid cold-state injection pipe to directly
contact high-temperature
molten metal to produce crack, spalling and other problems, prevent local cooling of
molten metal to form cold separation or blockage, improve
metal casting quality and production efficiency.