| 摘要 |
Application of foam onto a flat, generally horizontal panel having parallel material moved along the panel in the path between two laths and oscillating from side to side. The injection head may execute a pendulum type motion in a plane perpendicular to the panel. Used for the prodn. of construction panels, used e.g. for internal walls roof lining the like. Each pass of the foam follows the previous one comparatively rapidly and thus the difference in development, hardening etc. of the passes is not great and consequently gaps and irregularities are not formed. |
