Toggle lever clamping apparatus for injection molding machine

Abstract

A drive unit (21) is actuated to rotate a ball screw (20). Then, a ball nut (19) included in the ball screw and a cross bead (18) advance toward a movable platen (16) to extend a toggle link mechanism (17) gradually. Consequently, the movable platen (16) advances along tie bars (14), a movable platen support member (24) attached to the movable platen (16) moves on a base frame (11) and a movable mold (22) is brought into contact with a stationary mold (23). When the mold consisting of the movable mold (22) and the stationary mold (23) is thus clamped, a part of the frame provided with a recess (27) of the movable platen support member (24) is deformed elastically to permit the deformation of the movable platen (16) and movable mold (22). Thus the movable platen (16) is not restrained from deformation, clamping force can be uniformly applied to the mold and accurate moldings can be molded.

Dependencies are inferred from the claim text.