Abstract: A method and apparatus for manufacturing individual plates from a mineral wool mat while minimizing the spread of loose fibers. The method comprises the steps of cutting the mat into individual plates, forming the plates into a pile, establishing a region of vacuum for exhausting air from areas adjacent the sides of the pile and causing movement between the pile and the vacuum to vacuum the sides of the pile. The apparatus for performing the method includes a cutting device for cutting the mat into individual plates, a stacking device for combining the cut plates into a pile of plates, a vacuum device positioned to establish a vacuum for withdrawing air and loose fibers from the sides of the pile, and a conveyor for causing relative movement between the pile and the vacuum device.

Abstract: A method and an apparatus for manufacture of moulded mineral wool objects which are bound by a binder and which have a substantially constant cross-section along their entire lengths, whereby mineral wool in the form of flocks and/or granules which are impregnated or mixed with a binder and which are collected in a feeding chamber to which a mould channel is connected. The mineral wool is continuously or stepwise pressed by a compressing device into and through the mould channel and during the movement therein it is subjected to a heat treatment to cure the binder of the mineral wool, whereupon the continuous body of bound mineral wool is expelled from the channel. If desired it is subjected to a surface treatment or any subsequent treatment and is cut into intended lengths. The channel may include one or more cores providing one or more axial bores through the mineral wool body.