Patent ID: 6312249
Filing Date: 2001-11-06
Classification: B29C,B30B

Abstract:
A die closing device of an injection molding machine, comprising:a stationary die clamping plate;a movable die clamping plate movable relative to said stationary die clamping plate for varying a spacing between said stationary and movable clamping plates, said stationary plate being arranged in a plane and said movable plate being arranged in a plane;a toggle lever assembly, comprising:a first connecting rod having opposed first and second ends, and said first end being pivotally connected to said stationary clamping plate; anda second connecting rod having opposed first and second ends, said second rod first end being pivotally connected to said first rod second end and said second rod second end being pivotally connected to said movable die clamping plate;means connected to one of said first and second connecting rods for driving said one of said first and second rods to move said movable die clamping plate relative to said stationary plate and thereby vary the spacing between the stationary and movable die clamping plates for opening and closing the die closing device while maintaining the plane of the movable plate substantially parallel to the plane of the stationary plate;a spacer having an adjustable length and connected between one of said stationary and movable die clamping plates and the end of the connecting rod pivotally connected to said one of the clamping plates; anddriving means for operatively varying the length of said spacer so that the spacer exerts a desired closing force.