Adhesives Magazine

Slautterback: Head Driver for Hot Melt Systems

May 4, 2000
This company has introduced the PD1 Head Driver to enhance the performance of electric heads in hot melt applicator systems. The driver translates a 5- to 24-volt DC timing signal from a pattern controller to a high-energy, DC output signal for activating solenoid-activated valves for applying hot melt adhesive. Advantages over earlier-generation head drivers include sharper adhesive pattern cut-off, less heat generation of the valve solenoid coil to achieve longer service life, and increased accuracy of pattern placement. The high-energy DC output increases the valve’s opening and closing speed using pulse width modulation technology. It can open and close valves fast enough to produce a minimum adhesive bead output in eight milliseconds and recharge in about 15 milliseconds.