Abstract: A blow molding machine comprising an extruding device 2, one pair of mold-clamping devices 3, 3′, and hammering devices 4, 4′ for hammering blow pins 40, 40′ respectively into molds 30, 30′ in the one pair of mold-clamping devices 3, 3′, for blowing, a parison P extruded from the extruding device 2 being clamped by alternately switching the mold-clamping devices 3, 3′ and then, the blow pins 40, 40′ being hammered into the molds 30, 30′ by the hammering devices 4, 4′, respectively, wherein the one pair of mold-clamping devices 3, 3′ are linearly arranged in the same direction as an opening- and-closing direction of the molds 30, 30′ in the mold-clamping devices 3, 3′.

Abstract: A mold-clamping device for a blow molding machine. The device includes a body and tie bars which move forwardly and backwardly while supported in a horizontal posture by the body. It also includes front and rear platens which are disposed on the front and rear end portions of the tie bars. A movable platen which is forwardly and backwardly movable is also disposed on the tie bars in such a manner as to face the front platen. Split mold halves are disposed on opposite sides of the front platen and the movable platen. The body portion is provided with a crank mechanism and a driving source so that the driving force transmits a driving force to a crank shaft of the crank mechanism. The rear platen and the movable platen are connected to a crank arm of the crank mechanism through connecting rods.