Drive device for worm gear injection molding machine, has coupling device connecting spindle and cross head during normal load and decoupled by rotational forces acting on coupling device by spindle during overload

摘要

The device has a cross head (2) linearly moved by a linearly drivable spindle (1). A coupling device (5) connects the spindle and the cross head during normal load. The coupling device reversibly decouples the spindle and the cross head during overload acting on one of the spindle and the cross head. Rotational forces (R) act on the spindle. The coupling device is decoupled by the rotational forces acting on the coupling device by the spindle during the overload. The spindle is rotated with respect to the cross head after decoupling the coupling device.