Patent ID: 9138926
Filing Date: 2015-09-22
Classification: B29C

Abstract:
1. An apparatus for actuation of split locking nuts of a clamp unit of an injection molding machine, the clamp unit comprising: a fixed platen for supporting mold members; a movable platen assembly for supporting mating mold members; and a plurality of strain rods spanning from the fixed platen through the moveable platen assembly, the movable platen assembly comprising a mold supporting platen for supporting mating mold members, a clamp force actuator, and a plurality of split locking nuts each split locking nut comprising opposed movable nut halves for releaseably engaging the strain rods, the number of split locking nuts being no less than the number of strain rods, the apparatus comprising: a) a rotating member; b) a plurality of push rods; a first end of each push rod connected to the rotating member and a second end of each push rod connected to one movable nut half; c) the rotating member, opposed movable nut halves and push rods being arranged so that rotation of the rotating member through a predetermined angular range effects simultaneous longitudinal translation of the push rods and movement of all opposed moveable nut halves for each of engagement and disengagement of all split locking nuts with the strain rods; and, d) a split locking nut actuator for effecting rotation of the rotating member.