Die moderne Spanplattenfertigung: Stand der Technik bei den Fertigungsverfahren

Principles of Wood Science and Technology

“…The density of the board is reduced along the edges, and these defective edges must then be trimmed off." Himmelheber (1970) …”

“…Illustration of the terms spreadlength and spreading-angle. From Trutter and Himmelheber (1970) 1 ------Spreading-length -----=::t--__ -=---= _~~~s;,;;;;~~~ length the less is the parallel arrangement of the particles in the whole carpet to its middle-plane. Too steep spreading-angles cause horizontal shear forces which may result in the rise of destructive forces within the press.…”

“…Another variation is as follows (Fig. 5.102): Oontinuous spreading of chips on plastic folls in series -movement on an endless beltsawing to length -weighing -prepressing -hot pressing in a multi-daylight press, system Bähre & Greten (Trutter and Himmelheber, 1970).…”

“…This system which is acceptable in plants of small to medium capacity, has the following advantages : a) Control of the output of the mat-laying system; b) Control of the weight of total spread chip amount and thus insight into the relationship between output of mat and speed of cauls; c) Low investment cost and foolproveness . Himmelheber (1970) 2. Control of the weight of chips.…”

“…The trend to erect larger plants induced tbe suppliers of machines for this industry to continuously increase tbe efficiency of the chip spreaders. The use of several chip spreaders is not desirable with respect to more complicated conveyors, higher requirement for space, and especially the complicated control of the whole establishment (Trutter and Himmelheber, 1970).…”