Nordson Corporation

Timothy M Hubbard

John T Walsh

Taiwo T Osinaiya

Paula E Ruse

Charles P Ganzer

An electromagnetic dispenser for dispensing viscous heated fluids, such as hot melt adhesives. A fixed pole extends from a fluid chamber. The coil is located about a portion of the fixed pole and spaced from the fluid chamber to isolate the coil from the fluid flow path of the adhesive. The coil is insulated from the heat which is conducted from the adhesive as well as provided with a heat sink for dissipating heat. A plunger is mounted within the fluid chamber for reciprocal movement therein to open and close dispensing orifice in response to the field generated by the coil. When mounted to a service block, the coil assembly may be serviced without disconnecting the dispenser body from the source of heated fluid.

Apparatus for dispensing heated fluid materials

Fluid dispensing module for dispensing heated fluids, such as hot melt

An apparatus (10) for dispensing hot melt adhesives includes an air gap (100) in the adhesive manifold (16) of the dispenser (10). The apparatus (10) includes a heater (80), a temperature sensing device (RTD) (82) and adhesive passageway (84) located within the adhesive manifold (16) of the dispenser (10). The dispenser (10) delivers heated adhesive to a gun body (12) where it is applied to a substrate. The air gap (100) is interposed between the heater (80) and the adhesive passageway (84) and directs a majority of the heat generated by the heater (80) toward the gun body (12) and toward regions of the apparatus (10) needing additional heating. The air gap (100) enables a desired temperature gradient within the dispenser (100) to be maintained and prevents localized heating or cooling, thus decreasing the possibility that the adhesive will coagulate and plug the dispenser (10).

Thermal barrier for hot glue adhesive dispenser

An electromagnetic dispenser (10) for dispensing viscous heated fluids, such as hot melt adhesives. A fixed pole (50) extends from a fluid chamber (20). The coil (46) is located about a portion of the fixed pole (50) and spaced from the fluid chamber to isolate the coil from the fluid flow path of the adhesive. The coil is insulated from the heat which is conducted from the adhesive as well as provided with a heat sink (88) for dissipating heat. A plunger (32) is mounted within the fluid chamber for reciprocal movement therein to open and close dispensing orifice in response to the field generated by the coil.

Growing community of inventors

Canton, GA, United States of America

Timothy M Hubbard