Mold clamping mechanism for injection molding machine

摘要

A mold clamping device suitable for use in a small injection molding machine and manufacturable with low cost in which a sufficient clamping force is obtained by small number of parts. A link mechanism having a first link member and a second link member is provided between a rear platen and a movable platen. One end and the other end of the first link member are pivotally connected to the movable platen and the second link member, respectively. The second member is connected to the rear platen to be linearly movable with one end slidable along a linear guide provided at the rear platen. A stationary member of a linear motor is arranged at the rear platen and a movable member of the linear motor is provided at the second link member to surround the stationary member. The second link member is linearly moved by the linear motor to expand and fold the link mechanism so that mold halves attached to the stationary platen and the movable platen, respectively are closed to be clamped and opened to be unclamped.