| 摘要 |
The invention relates to the making of marks on a composite product, i.e. made of a matrix with wires embedded in it, the matrix being in particular plaster, and the wires glass. It provides a method consisting essentially in spraying onto the product to be marked at least one jet of a fluid at a pressure at least equal to that which will degrade the matrix but less than that which will attack the wires embedded in the matrix. It also provides a device for carrying out the method, this device essentially comprising one or more nozzles directed towards the product and supplied with a fluid, in particular water, under pressure. It allows marks to be obtained that may or may not cross the product, according to choice, marks that cross it being particularly suited to forming fold lines with a view to making non-flat construction panels. <IMAGE> |
