APPARATUS FOR MOLDING PLASTIC

摘要

PURPOSE:To eliminate the irregularity in mold clamping force, to prevent the offsetting in demolding and to facilitate taking out of a molded product, by converting a movable surface plate from a horizontal posture to an upright posture by a revolution cylinder and pushing out the piston rod of each mold clamping cylinder to pierce the same through the movable surface plate to insert the piston rod of each engagement cylinder in an engaging hole and drawing the piston rod near by each mold clamping cylinder to close and clamp a movable side mold to a fixed side mold. CONSTITUTION:A piston rod 17a is pushed out by a revolution cylinder 17 from such a mold opening state that a movable receiving stand 12 is revolved to a horizontal posture by the revolution cylinder 17 to allow a movable surface plate to stand upright. Each mold clamping cylinder 13 is operated to push out a piston rod 13a and the leading end part of said rod 13a is pierced through the piercing hole 12a of the movable surface plate 12 to be protruded to the back surface side of said plate 12. Each engagement cylinder 18 is operated to push out each piston rod 18a and inserted in the engaging hole 13b of each piston rod 13 to be engaged therewith at the leading end part thereof. The piston rod 13a is drawn-in by each mold clamping cylinder 13 to draw the movable surface plate 1 near to the side of a fixed surface plate 11 to close and clamp a movable side mold 7 and a fixed side mold 6.