FLUID DISPENSER UTILIZING DUAL COILS AND METHODS OF FLUID DISPENSING

摘要

A dispenser body having a liquid inlet, a discharge outlet, and a flow channel capable of directing a flow of the hot melt adhesive from the liquid inlet to the discharge outlet. The flow channel includes a valve seat between the liquid inlet and the discharge outlet. The dispensing module further includes a needle having a valve member mounted for movement in the dispenser body between an open position in which the valve member is disengaged with the valve seat allowing liquid flow from the discharge outlet and a closed position in which the valve member is engaged with the valve seat preventing liquid flow from the discharge outlet. A first electromagnetic coil is activated to move the needle to the open position and a second electromagnetic coil is activated to move the needle to the closed position.

主权项

1. A dispensing module for dispensing a liquid, comprising:
a dispenser body having a liquid inlet, a discharge outlet, and a flow channel capable of directing a flow of the liquid from said liquid inlet to said discharge outlet, said flow channel including a valve seat between said liquid inlet and said discharge outlet; a needle having a valve member mounted for movement in said dispenser body between an open position in which said valve member is disengaged with said valve seat allowing hot melt adhesive flow from said discharge outlet and a closed position in which said valve member is engaged with said valve seat preventing liquid flow from said discharge outlet; and an actuator operatively coupled to said needle, said actuator capable of actuating said needle between the open and closed positions to selectively dispense hot melt adhesive from said discharge outlet, said actuator further comprising an armature coupled with said needle and first and second electromagnetic coils positioned proximate to said armature, wherein said first electromagnetic coil is activated to move said needle to the open position and said second electromagnetic coil is activated to move said needle to the closed position.