The present invention relates to a mold base comprising: a fixation mounting plate which is installed on a fixation mold sticking plate of an injection molding machine; a fixation die plate which is assembled in order to have a cavity on one side of the fixation mounting plate; an operation mounting plate which is installed on an operation mold sticking plate of the injection molding machine; and an operation die plate which is assembled on one side of the operation mounting plate and includes a core engaged in a cavity of the fixation die plate. The fixation die plate and operation die plate are made of aluminum alloy materials and are molded by a die casting method. The mold base of an injection mold according to the present invention is able to reduce costs required for raw materials since the fixation die plate and operation die plate are made of aluminum alloy materials, and improves productivity since timed required in manufacture is reduced by performing molding with the die casting method.;COPYRIGHT KIPO 2014
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