An injection molding apparatus comprising an injection molding machine, a manifold, a closure valve pin, a first actuator having a linear or axial driver, a second actuator comprising a rotor interconnected to either the closure valve pin or to a second valve pin such that either the closure valve pin or the second valve pin is rotatably driven in unison with the rotor around the rotation axis, the closure pin or second pin being disposed and rotatable within the flow of injection fluid flowing through a flow channel leading to a mold cavity.

An injection molding apparatus including an actuator interconnected to a rod or valve pin having a smooth continuous cylindrical outer surface and one or more discontinuous or relieved or relieved portions formed as discontinuities in the cylindrical outer surface and adapted to be disposed within a fluid flow channel, the one or more discontinuous or relieved portions being configured and arranged along the axial length of the pin or rod such that the flow of injection fluid over or past the one or more discontinuous or relieved portions is modified to flow at substantially different rates or velocities or in substantially different flow patterns relative to rate or velocity or pattern of flow of injection fluid over or past the smooth continuous cylindrical outer surface.

A driving force transmission unit includes a rotary plate provided with a rotation axis at an eccentric position, and a support portion having a hole portion through which the rotation axis passes and being configured to support a plunger. The hole portion extends in a moving direction of the plunger. The support portion swings in an extending direction of the hole portion by rotation of the rotary plate. When dispensing processing is terminated, an angle is larger than 90 degrees and smaller than 180 degrees, the angle being formed between a linear line connecting the rotation axis and a center of the rotary plate to each other and the moving direction of the plunger as viewed in a direction of the rotation axis. A control unit controls a rotation speed of a motor according to the angle during the dispensing processing.

A stock servomotor structure of an injection molding machine, comprising: a shell, a rotor shaft, a front cover and a rear cover, wherein the shell has an accommodating space inside, a convex ring part is configured on one side of the rotor shaft and an opening is configured on one side end, the front cover has a single row tapered roller bearing and a spherical roller thrust bearing, the front cover has a through hole on two sides, the rear cover has a rolling bearing. The stock servomotor is configured with the single row tapered roller bearing, the spherical roller thrust bearing and the rolling bearing to clamp the rotor shaft and bear the axial force loading generated by the injection molding machine and the stock servomotor is configured to directly drive the threaded rod of the injection molding machine to rotate.