System for dispensing viscous liquids
Apparatus for dispensing viscous liquid, such as hot melt adhesive, including an automated adhesive conveyance (e.g., pneumatic transfer) feed unit, a heated melt tank, a pump, heated hose, dispensing valve, and control unit. The adhesive unit is specifically designed to run at maximum temperature of 275° F.
1 . An apparatus for feeding, melting and dispensing a hot melt adhesive comprising a heating chamber for melting a hot melt adhesive and/or maintaining a hot melt adhesive in its molten form, a means for feeding adhesive into the heating chamber, and means for dispensing molten adhesive from the heating chamber, the apparatus characterized in that the heating chamber is controlled to have a maximum operating temperature of 275° F.
2 . The apparatus of claim 1 wherein said means for feeding adhesive into the heating chamber comprises an auto feed chamber.
3 . The apparatus of claim 2 wherein the auto feed chamber is integrally connected to the heating chamber.
4 . The apparatus of claim 1 wherein the heating chamber comprises heating elements that are thermostatically controlled to reach said maximum operation temperature.
5 . The apparatus of claim 4 wherein the heating elements in said heating chamber are controlled to maintain molten adhesive at a temperature of about 200° F.
6 . The apparatus of claim 1 comprising a dispensing valve.
7 . The apparatus of claim 1 wherein the heating chamber is connected to a dispensing pump.
8 . The apparatus of claim 7 wherein the dispensing pump is a piston pump.
9 . The apparatus of claim 7 wherein the dispensing pump is a gear pump.
10 . The apparatus of claim 1 further comprising a means whereby the dispensed molten adhesive is transported for end use application onto a substrate surface.
11 . The apparatus of claim 9 wherein said means for transporting said molten adhesive is a heated hose.
12 . The apparatus of claim 1 comprising an adhesive inlet valve for introducing solid adhesive into the auto feed chamber.
13 . The apparatus of claim 1 comprising a means for automatically maintaining adhesive level.
14 . The apparatus of claim 1 wherein the heating chamber is plastic.
15 . The apparatus of claim 1 wherein the heating chamber is metal.
16 . The apparatus of claim 15 wherein the heating chamber is aluminum.