A shot cylinder controller for injection molding machines comprises a valve connected with one side of the shot cylinder and including a valve head which is movable with respect to a seat. The valve head is connected with at least two, lineally extensible actuators, interconnected in an end-to-end relationship. The actuators are independently extended and retracted, whereby selective manipulation of the actuators varies the position of the valve head, and thereby controls the extension of the shot cylinder and regulates the speed of die injection.
A molding machine having a die means in combination with a shot cylinder and a controller therefor, wherein: said shot cylinder comprises a housing having a shot piston mounted slidably therein for actuating a plunger for injecting a flowable material into said die, whereby translation of said shot piston in said housing controls the speed at which said die means associated with the die casting machine is injected with said flowable material; said controller comprising: a valve connected with one side of said shot cylinder, and including a body having a ...
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