The machine is equipped with starwheels to pick up plastic caps. The starwheels are used for bottles and plastic caps and operate synchronously so that the plastic caps can be precisely aligned with and screwed on the bottle mouths in the high-speed production.

The screwing heads of the machine are equipped with regulators having permanent magnetic floating torsion instead of the machine with stable torsion, by which the mechanical structure of the machine will be reduced wear & tear, and allow plastic caps to be screwed on the bottle with high precision. The machine is provided with bottle presence sensors having the function of not releasing plastic caps when bottles are not located in their positions.