Patent ID: 7677414
Filing Date: 2010-03-16
Classification: B05B,B05C,B29B

Abstract:
1. A device for applying a foamed hot melt adhesive having a first compression process including a first gear pump and a second compression process including a second gear pump, supplying a hot melt adhesive with application of pressure in the first compression process, mixing a gas with the hot melt adhesive in the second compression process, and discharging the foamed hot melt adhesive from a discharge opening, wherein the first gear pump of the first compression process and the second gear pump of the second compression process are driven by drive mechanisms independently from each other and rotation frequencies of the first gear pump and the second gear pump, respectively, are set independently and arbitrarily, and a gas suction opening is provided between the first gear pump and the second gear pump in the second compression process and a mixer is provided between the gas suction opening and the second gear pump so as to enhance mixture and dispersion between the gas and a liquid, and an end of a return circuit in the second compression process is located at a downstream of the first gear pump so as to prevent air bubbles from returning to a tank.