| 摘要 |
The invention relates to a method and a device for applying foamed thermoplastic fluid, especially foamed hot melt adhesive, onto a substrate (38). According to said method, the thermoplastic fluid is conveyed from a fluid source to a mixing device (14, 9), the fluid is exposed to a pressurized gas in the mixing device (14, 9) such that the gas is dissolved in the fluid, whereupon the fluid containing dissolved gas is conveyed to a fluid-applying device (30) comprising a nozzle arrangement (34), is dispensed by said fluid-applying device (30), and is expanded to ambient pressure such that the fluid foams by means of the previously dissolved gas. According to the invention, the fluid containing the dissolved gas flows through a fluid-permeable structure that comprises a plurality of communicating hollow spaces before being discharged from the nozzle arrangement (34) and is then dispensed in the direction of the substrate (38) by the nozzle arrangement (34) and is placed thereupon. The nozzle arrangement (34) is not in contact with the substrate (38). |
