| 摘要 |
<p>A dual, variable volume hot melt adhesive dispensing nozzle or die assembly is provided with a pair of choke slots (194, 208) within a first fluid control plate (166). The provision of the choke slots within the first fluid control plate effectively restricts and retards the flow of the fluid through such choke slots whereby volumes of the fluids are effectively built up and stored upstream of the choke slots so as to effectively delay the reaction of pressure spikes upon the fluid flows under both positive and negative conditions. This buildup in pressure and volume is then dispensed over time so as to cause the fluid flow to smoothly transition between positive and negative spiked fluid flow conditions and normal fluid flow conditions. Accordingly, the pressure spikes do not adversely affect the resulting fluid flows whereby, for example, under conventional negative pressure spike conditions, gaps in the dispensed hot melt adhesive would otherwise occur.</p> |
