Patent ID: 8770266

Claim:
An apparatus for producing a piston for an internal combustion engine by casting, the piston having a cooling channel therein, the apparatus comprising: a fixed die with an upwardly opened cavity in which a core serving to form the cooling channel is to be disposed; a moveable die moveably disposed relative to the fixed die in a vertical direction, the moveable die comprising a predetermined engaging portion, the moveable die being inserted and engaged in the fixed die through the engaging portion to thereby serve to form a crown surface of the piston, a guide die comprising an engaging portion engageable with the fixed die, the engaging portion of the guide die having a same shape as that of the engaging portion of the moveable die, and a core retaining mechanism disposed in the guide die, the core retaining mechanism serving to retain the core in a predetermined position, wherein after the guide die retaining the core through the core retaining mechanism is engaged with the fixed die to arrange the core in the cavity, the guide die is moved apart from the fixed die, and then the moveable die is inserted and engaged in the fixed die to thereby carry out casting of the piston.