Solid material comminution or disintegration – Apparatus – Including means applying fluid to material
Patent
1992-04-03
1993-06-22
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Including means applying fluid to material
2411017, 241605, 19 80R, B02C 2326
Patent
active
052210537
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is directed to a device for opening pressed fiber bales.
A device for opening pressed fiber bales is known e.g. from German Laid-open 33 34 222. In this state of the art, it was tried to make the suction performance of the opening device independent from the accuracy of the fiber bales placed in a row by improving the guidance of air in the suction hood above the fiber bales.
Due to the large suction performance which previously has been required for obtaining the minimum air speed needed for the removal of reduced fiber flocks, there have been disturbances with respect to the air intake into the reduction device such that accurate reducing of the bale surface has been impaired and adjustment of a definitive reduction quantity has been rendered difficult. The air entering at a high flow speed could even result in a curved shape of the bale surface. FR-A-2572244 describes a device for the opening of pressed fiber bales wherein the suction hood in the lower portion thereof is provided with pivotable side walls adapted for adjusting the distance of the side walls to the milling rollers of the opening device so as to adjust the flow speed of the sucked air. The air guidance in this case is provided exactly such that the sucked air stream is directed almost vertically onto the bale surface and thus generates the above mentioned curved shape of the bale surface.
DE-A-3903238 describes an opening device wherein an air guide sheet of triangular section is arranged between the two milling rollers, said air guide sheet being provided for guiding the air stream between the two milling rollers into the suction hood.
It is the object of the invention to improve a device for opening pressed fiber bales in such a manner that uniformity in reducing the pressed fiber bales is enhanced and the required air quantity is lowered.
The object is solved by the features as discussed below.
SUMMARY OF THE INVENTION
For solving said object, there is provided according to the invention a device for opening pressed fiber bales of spinning material, using at least one milling roller acting on the bale surface of the fiber bales, and one pressure roller arranged before and behind the milling roller, respectively, in the moving direction and being parallel to the milling roller, with a suction hood, having a first air guide sheet, being arranged above the milling roller for sucking off the reduced fibers in an air flow occurring between said first air guide sheet and the pressure roller, wherein an air-guide channel, formed by the first and a second air guide sheet, is arranged between the pressure roller and the milling roller, extending over the whole length of the milling roller and in parallel to the milling and pressure rollers, said air-guide channel guiding the air entering between the pressure roller and the first air guide sheet into a direction substantially parallel to the bale surface.
The air-guide channel, arranged between the pressure roller and the milling roller, advantageously provides a deflection of the sucking air flow, entering at high air speed, into a direction substantially parallel to the bale surface, and thus facilitates the reduction process in the milling area and the removal of the reduced fiber flocks. The sucking air flow does not impinge anymore directly onto the bale surface in the area between the pressure roller and the milling roller, and it is not possible anymore that this sucking air flow, according to the local density of the pressed fibers, will detach fibers and thus contribute to the formation of craters in the bale surface, which craters can lead to an undesired wave-shape both in longitudinal and lateral direction of the bale surface.
By a second air-guide sheet, the air entering between the pressure roller and the first air-guide sheet is guided into a direction substantially parallel to the bale surface. Thus, the sucking air flow, without having an effect on the bale surface, is guided in such a manner that the flow of air, while moving substa
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patent: 5090091 (1992-02-01), Temburg et al.
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Lucassen Guenter
Pinto Akiva
Schmidt Reinhard
Hergeth Hollingsworth GmbH
Husar John M.
Rosenbaum Mark
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