Patent ID: 7077637

Claim:
A force detecting controlling device of a screw for an injection molding machine, which being installed on an injection unit, the injection unit comprising: at least one front fixed plate having a penetrating hole center of the front fixed plate; at least one rear fixed plate installed parallel to said front fixed plate, and a center of the rear fixed plate having another penetrating hole to contain a force detecting component and a ball screw nut; at least two guiding rods installed between said front fixed plate and said rear fixed plate, and the two guiding rods being parallel each other; a moving plate being capable of sliding on said two guiding rods and a side of the moving plate connecting to a screw via a metering driving device and another side of the moving plate connecting to a ball screw via an injection driving device; a force detecting component comprising a load cell having an outside ring on the rear fixed plate by a set of bolts, and an inner ring of the load cell fixed on a ball screw nut by another set of bolts; wherein the injection driving device rotates said ball screw relative to the ball screw nut fixed on said force detecting component and drives said moving plate and said screw.