| 摘要 |
<p>A reactive mixture is applied with a spray nozzle (3) to produce a layer (5) on the lower half (2) of a mold before a substrate (10) is applied and the mold closed. The application area is altered during spraying by swinging the spray with a defined amplitude, e.g. 0/5 to 300 mm, and frequency, e.g. 20 to 200 Hz, with the distance to the surface remaining constant. The change can be gradual or along a ramp function and the spray rate is varied accordingly. An independent claim is also included for the corresponding equipment comprising a storage container (6), metering device (7), mixing head (4) and spray nozzle (3). The nozzle (3) can be oscillated by a drive according to a set program. The oscillation can involve the nozzle (3) alone or the mixing head (4) and nozzle (3) together, using an elastic connection, e.g. a ball joint or bellows.</p> |
