Abstract:
A pump system (10) for pumping a fluid includes a motor housing (46), a motor (36), a rod (50), a positive displacement pump (32), a position sensor (52), and a controller (18). The motor (36) is located within the motor housing (46). The rod (50) is connected to and driven by the motor (36) and the positive displacement pump (32) for moving a fluid is driven by the rod (52). The position sensor (52) produces a rod position signal that is a function of a position of the rod, and the controller produces a drive signal for driving the motor (36) as a function of the rod position signal.
Abstract:
A method of operating a melt system includes melting, flowing, pumping, and replenishing. Hot melt pellets are melted in channels of a melter into a melt liquid that has an upper surface that represents a melt level of the melt liquid in the melter. The melt liquid is flowed downward through the channels to a melt system outlet. The melt liquid is pumped from the melt system outlet. The melter is replenished with hot melt pellets until the melt level is proximate to a top end of the channels.
Abstract:
A melter for a melt system includes a tank, a vibration generating device, and a heater. The tank has a wall for containing a hot melt adhesive, and the vibration generating device vibrates the wall. The heater transfers heat to the tank.
Abstract:
A hot melt system is described which includes a container of hot melt pellets, a melter, a feed system, a pump, and a dispensing system. A pressure relief system is built around the pump, which may redirect liquefied adhesive from the pump outlet to the pump inlet.
Abstract:
A heating system includes an air motor with an exhaust; a pump for a hot melt dispensing system and driven by the air motor; and a shroud enclosing at least a portion of the air motor and the pump to direct heat from the pump to the exhaust of the air motor.
Abstract:
A hot melt dispensing system includes a hopper, a delivery line, a shaker, and an air supply line. The hopper stores hot melt pellets and the delivery line delivers the hot melt pellets from the hopper. The shaker agitates the hot melt pellets. The air supply line supplies air that flows through the shaker to produce vibration and additionally flows through the delivery line to create a vacuum that draws the hot melt pellets through the delivery line.
Abstract:
A two-piece collar (10) is rigidly clamped onto the hydraulic driver shaft (12) via two shoulder bolts (14). The collar halves (16) engage a tightly toleranced groove feature (18) on the spool (20) that is assembled onto the linear sensor shaft (22). The spool (20) houses a magnet (24) that sends a position signal to the sensor (26). As the hydraulic driver shaft (12) reciprocates during operation, the spool (20) moves along with it sending the position signal to the sensor (26) that tells the driver (28) to change direction. The hydraulic driver and chemical pump shafts (12) can slowly rotate over time, which is preferred for increased chemical pump/hydraulic driver seal life.
Abstract:
A system includes a base, a melter, and a heater. The base defines a basin with an outlet connected to the basin. The melter is above the base and has an upper end for receiving hot melt pellets and a lower end adjacent to the basin so that hot melt liquid can flow from the melter through the basin to the outlet. The heater is attached to at least one of the base and the melter, and the melter is releasably attached to at least one of the base and the heater.
Abstract:
An accumulator for a hot melt dispensing system includes an accumulator body; a flow passage through which hot melt adhesive flows to a dispenser; an energy storage device for storing energy based on pressure of the hot melt adhesive in the flow passage and using stored energy to apply pressure to the hot melt adhesive when pressure in the flow passage decreases; and a heating element for heating the hot melt adhesive in the accumulator.
Abstract:
A pour spout adapter comprises a housing, a collar and a threaded engagement. The housing has a sealed bore for receiving a tube. The collar has an internal bore coupled to the housing at a rotatable connection so as to permit a tube to extend from the sealed bore through the collar. The threaded engagement is disposed on the internal bore to receive a threaded pour spout.