Grinding element and grinder stone
AssigneeMetso Paper, Inc.
InventorOlli Tuovinen
Life of this patent
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Abstract
The invention relates to a grinding element, which comprises a substantially planar fastening frame, and where two or more grinding segments made of grinding ceramic material are fastened to the outer surface of the frame by means of bonding agent. The fastening frame preferably comprises at least one fastening hole, and a fastening bolt is supplied through the hole to fasten the grinding element to the frame of the grinder stone. The invention further relates to a grinder stone, where a grinding surface is formed by arranging a required number of grinding elements according to the invention on the outer circumference of the stone's frame.
Claims18
A grinding element adapted to be arranged on an outer surface of a frame for a grinder stone used to defiber wood, the grinding element comprising:
- a fastening frame having a first surface configured to operably engage the frame of the grinder stone and an opposed second surface;
- a fastening device configured to operably engage the fastening frame and to secure the fastening frame to the frame of the grinder stone;
- and
- a plurality of grinding segments, each defining an area smaller than the second surface of the fastening frame and being comprised of a ceramic grinding material, the grinding segments being fastened to the fastening frame with a bonding agent disposed between the grinding segments and the second surface so as to secure the grinding segments to the second surface, the minding segments cooperating to substantially cover the second surface of the fastening frame and to form at least a portion of a grinding surface of the grinder stone.
A grinder stone adapted to defiber wood, comprising:
- a grinder stone frame defining an outer surface and adapted to be rotatable about a shaft;
- and
- a plurality of grinding elements operably engaged with the outer surface of the grinder stone frame such that the grinding elements cooperate to form a substantially cylindrical grinding surface of the grinder stone, each grinding element comprising:
- a fastening frame having a first surface configured to operably engage the frame of the grinder stone and an opposed second surface;
- a fastening device configured to operably engage the fastening frame and to secure the fastening frame to the grinder stone frame;
- and
- a plurality of grinding segments, each defining an area smaller than the second surface of the fastening frame and being comprised of a ceramic grinding material, the grinding segments being fastened to the fastening frame with a bonding agent disposed between the grinding segments and the second surface so as to secure the grinding segments to the second surface, the grinding segments cooperating to substantially cover the second surface of the fastening frame and to form at least a portion of a grinding surface of the grinder stone.
Dependencies are inferred from the claim text.