Patent ID: 8328547

Claim:
An injection foam molding machine comprising: a clamping unit that moves a movable die plate relative to a fixed die plate and clamps the die plates; a fixed side mold attached to the fixed die plate; a movable side mold attached to the movable die plate; a plurality of drive units that widen an interval between the die plates; and a die-plate-interval adjusting unit that adjusts a distance over which the movable die plate is moved by the drive units, wherein the drive units, which are hydraulic cylinders with which a ram is driven to an activation end, are fixed to the fixed die plate or the movable die plate, the die-plate-interval adjusting unit is fixedly provided on an alternate one of the die plates at a position facing the drive units, and an adjustment end of the interval adjusting unit is abutted to a leading end of an activating rod of the hydraulic cylinders of the drive units, thereby determining the interval between both of the die plates.