METHOD AND DEVICE FOR FORMING SURFACE GROOVE IN PLATE CONSISTING OF SOFT MATERIAL AND USE OF SAID DEVICE

摘要

PURPOSE: To provide a surface channel of at least approximately rectangular cross section in an easy and reproducible fashion in a short time in sheeting made of a soft material, particularly mineral-fiber heat insulating mats or plates made of a styrene polymer. CONSTITUTION: A motor-operated cutter 10 having an oscillating cutter 20 is used. The cutter 20 has sections which are bent off relative to each other and which are provided with a cutting edge, at least in part. The cutting edge extends over at least three or two sections which together form a U or L. The cutter 20 is passed through sheeting approximately along a straight line 83.