Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1991-03-04
1993-06-08
Kisliuk, Bruce M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51241R, 51241S, 51246, B24B 1900
Patent
active
052168417
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a sharpening device for the blade of a cross-cutting roller.
BACKGROUND ART
In many cellulose plants, the cellulose-drying machine is a bottleneck in production, so that special attention is paid to its operation. In accordance with the present technique, the blades of the cross-cutting roller of the sheet cutter of the drying machine are changed every two months, sometimes even every two weeks if necessary. The blunt blades are generally sent to a suitable manufacturer for sharpening, after which they are returned to the plant. The removal of the blade sheets of the cross-cutting roller and their replacement with other blades causes a shutdown of about eight hours in the production of the entire plant. Naturally, attempts are made to fit this in with other breaks in production, but this does not always succeed, or the change of the blades prolongs shut-down from other causes.
Blades that have been removed can be sharpened for example in a sharpening device in accordance with U.S. Pat. No. 4,685,250. British patent publication GB-1432873 shows a sharpening device that is intended to sharpen the blades of cylinder rollers, in particular in grain and hay harvesters. A device of this kind requires the previous installation of suitable guides on the frame of the machine, in which the grinding device can move. Devices of this kind are difficult to adapt to suit the sheet cutter of a drying machine, because its width, 6-8 m, would lead to massive support structures.
German publication print 1159804 describes a sharpening device for the blade of a planing machine, in which the sharpening device is placed on top of the drum by means of sliding shoes located on both sides of the blade. A solution of this kind cannot be considered with long blades, because the surface of the drum is in any case so uneven that a good support cannot be obtained from it.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a new kind of sharpening device for the blades of a cross-cutting roller, which makes it possible to sharpen them without the blade plates having to be removed.
Another object of the invention is to provide a sharpening device for the blade of a cross-cutting roller, which is located in the angle formed by the two machined surfaces of the cross-cutting roller in such a way that the original bevel of the blade is outer and that the blade is sharpened by grinding a less steep bevel than the original bevel on the point of the blade plate, and which sharpening device includes support wheels, a sharpening blade and devices to rotate it.
It is another object of the invention to provide a sharpening device to be used in connection with the cross-cutting roller of a sheet cutter in a cellulose-drying machine, that can also be adapted for sharpening a blade attached to any corresponding kind of roller, in which the sharpening takes in a corresponding manner. For example, the invention is suitable for sharpening the blades of the cross-cutting roller of a cardboard machine.
A more specific object of the invention is to provide a sharpening device for the blade with a cross-cutting roller in which the cross-cutting roller includes at least one blade plate which is placed in the angle form by the two machine surfaces of the cross-cutting roller in such a way that the original bevel is outer and that the blade is sharpened by grinding a less steep edge bevel than the original bevel of the blade plate. The sharpening device includes support wheels, a grinding stone and vices to rotate it and at least one support wheel is adapted to be supported on the original bevel of the blade plate and on the free side surface of the blade plate.
In a preferred embodiment of the invention, the sharpening device includes two support wheels that are supported on the original bevel of the blade plate and a side support wheel that is supported on the other machine surface of the cross-cutting roller which support wheel travels at a slight distance from the blade plate. An auxilia
REFERENCES:
patent: 1863036 (1932-06-01), Wike
Kisliuk Bruce M.
Morgan Eileen
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