Method and machine for refining wood chippings, shavings, paper pulp and the like
AssigneeCellwood Machinery AB
InventorTorsten Lennart Berggren
Life of this patent
Estimating the term…
Abstract
Refining machine for chippings, shavings, paper pulp and the like comprising two grinding discs rotatable relative to one another and each provided with grinding bodies, forming between them a narrow slot-shaped grinding chamber. The grinding discs are so arranged that they can be displaced relative to one another for the adjustment of the size of the slot-shaped grinding chamber in order to compensate for the wear of the grinding bodies. Means is provided to cause the grinding discs to approach one another continuously at a predetermined rate during the period the machine is in operation.
Claims19
Method of refining wood chippings, shavings, paper pulp in high non-pumpable concentrations and the like by use of a refining machine which includes two relatively displaceable grinding devices which are rotatable relative to one another and which are each provided with grinding bodies thereon, the method comprising:
- arranging said grinding devices to form a narrow slot-shaped grinding chamber between the grinding bodies of the two grinding devices, said grinding devices being relatively displaceable toward and away from each other so as to vary the size of said slot-shaped grinding chamber;
- and
- displacing a grinding device relative to the other as a function of the position thereof relative to the other grinding device and at a predetermined rate during the period of time the machine is in operation, said predetermined rate being independent of the relative positions of the grinding devices, to vary the distance between said grinding devices so as to compensate for wear of said grinding bodies of said grinding devices.
Machine for refining wood chippings, shavings, paper pulp in high non-pumpable concentrations and the like, comprising:
- two grinding devices which are rotatable relative to one another and each of which are provided with grinding bodies, a narrow slot-shaped grinding chamber being formed between the grinding bodies of said grinding devices;
- means for displacing said grinding devices relative to one another for adjusting the size of said grinding slot and for compensating for the wear of said grinding bodies;
- and
- means coupled to said displacing means for relatively moving said grinding devices toward each other at a predetermined rate during the period of time the machine is in operation to compensate for wear of the grinding bodies by adjusting the spacing between said grinding devices at said predetermined rate, so as to maintain the size of said grinding slot substantially constant.
Dependencies are inferred from the claim text.