DUAL COMPONENT DISPENSER GUN FOR CONTROLLED DISPENSING OF FLOWABLE DUAL COMPONENT MATERIALS

摘要

A dual component dispenser gun is provided for controlled dispensing of flowable dual component materials, such as adhesives, sealants and the like. The dispenser gun is designed for use with a dual component cartridge having dual barrels respectively filled with the two flowable components, in combination with a mixing nozzle through which the components can be mixed and dispensed. The cartridge is supported on top of a main pressure cylinder adapted for controlled connection to a pressurized fluid source, such as compressed air, for displacing a power piston in a first direction. The power piston is connected to a pair of flexible piston rods which extend through curved guide channels in a guide head and are connected in turn to a pair of piston plungers receivable into the cartridge barrels to dispense the dual components. A pressure responsive retractor assembly is carried by the power piston and responds to disconnection of the fluid source from the main cylinder to retract the power piston and associated piston plungers at least slightly and thereby eliminate drool of the flowable components from the mixing nozzle.