Clamping device for electric-powered injection molding machine
AssigneeSumitomo Heavy Industries, Ltd.
InventorMasaya Kitajima
Life of this patent
Estimating the term…
Abstract
In a clamping device used in an electric-powered injection machine, a motor support (33) is resiliently supported relative to a rear platen (31), and a motor (35) is fixed to the motor support (33). A toggle mechanism is disposed between the motor support (33) and a movable platen (2), so that the movable platen (2) can be moved by driving the motor (35). A rod (45) is also provided to extend with one end abutable against the rear platen (31) and with the other end supporting the toggle mechanism. A reaction force against the clamping force is transmitted directly to the rear platen (31). Thus, it is possible to enhance the durability of the toggle mechanism and to provide an increased clamping force.
Claims11
A clamping device for an electric-powered injection molding machine, comprising:
- (a) a stationary platen,
- (b) a rear platen disposed in an opposed relationship to said stationary platen,
- (c) a movable platen disposed between said stationary platen and said rear platen for advancing and retreating movements along tie bars,
- (d) a pair of dies respectively mounted on said stationary platen and said movable platen, the advancing movement of said movable platen clamping said dies together with a clamping force,
- (e) a motor support resiliently supported relative to said rear platen with a biasing force smaller than the clamping force,
- (f) a motor fixed to said motor support,
- (g) a toggle mechanism interconnecting said motor support and said movable platen for moving said movable platen by reception of the rotation of said motor, and
- (h) a reaction force transmitting member for transmitting a reaction force against the clamping force transmitted to said toggle mechanism, directly to the rear platen without transmitting through said motor support.
Dependencies are inferred from the claim text.