Solid material comminution or disintegration – Apparatus – Including means applying fluid to material
Patent
1992-04-03
1993-08-17
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Including means applying fluid to material
2411017, 241605, 19 80R, B02C 1912
Patent
active
052363430
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an opening device for a row of pressed fiber bales set up against a bale supporting wall.
Such opening devices are needed to reduce pressed fiber bales set up in rows and to convey loosened fiber flocks to the next processing machine in a flow of transport air. The pressed fiber bales may be set up along a bale supporting wall, the opening device, e.g. accommodated in the arm of a displaceable tower, moving along the wall, successively reducing the bales arranged before the same.
It is a problem of such milling devices that the toothed disc of the milling disc that is nearest the bale supporting wall does not get close enough to the wall to effect a complete reduction of the periphery of the bale so that an undesired narrow ridge will remain at the wall.
It is an object of the invention to improve an opening device such that it allows a total reduction of bale rows set up against a wall.
The object is solved by the features of the claims:
SUMMARY OF THE INVENTION
In the plane of the milling area, a suction opening in the front wall of the arm casing causes a strong suction flow between the arm casing and the bale supporting wall so that remainders of bales between the arm casing and the bale supporting wall are reliably sucked off without having to be loosened from the fiber material e.g. by a toothed roller.
It is provided that a stripping device abutting the bale support wall is arranged at the front end wall in the vicinity of the suction opening. The stripping device supports the sucking off of possible bale remainders at the bale support wall by peeling the bale remainders off the bale support wall using the stripping device, thereby facilitating their being sucked off via the suction opening.
Preferably, the cross section of the suction opening is enlargened towards the center between the milling rollers. Thus, the sucked-in flow is strongest in the center between the milling rollers.
The respective suction openings may begin in the plane of the milling area of the milling rollers so that the suction flow does not interfere with the milling process in the working area of the toothed rollers of the milling rollers on the bale surface.
In an embodiment of the present invention, it is contemplated that a suction opening is recessed in the rear wall of the arm casing opposite the front wall in the area between the milling rollers, the opening being open towards the bale surface. This suction opening allows to reduce the periphery of the pressed fiber bales, even when the set up rows of bales take the entire length of the arm.
An air-intake opening may be provided in the front wall of the arm casing, having an adjustable air-intake cross section. By means of this air-intake opening, the ratio of the quantity of air sucked in via the same may be adjusted relative to the quantity of air sucked in otherwise, thus allowing an adjustment of the air flow velocity at the suction openings in the front walls.
The front wall of the arm casing may first extend rectangularly to the milling roller axes in the region of the milling rollers and, finally, is angled in an acute angle relative to the bale supporting wall on both sides of the milling area.
The front wall being laterally recessed on both sides of the milling area, the supply of air to the suction opening in the front wall is facilitated in the wall milling process. Moreover, the inclined front wall areas allow the arm to get closer to the bale supporting wall, since the free space needed to prevent collisions when turning the tower can be reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
The following is detailed description of an embodiment of the present invention with reference to the drawings.
In the Figures:
FIG. 1 is a front view of the milling device of a bale opening device, and
FIG. 2 is a cross section of the arm in the region of the suction opening in the front wall.
FIG. 3 is a front view of an embodiment of the stripping device, and
FIG. 4 is a plan view of the stripping device of FIG. 3.
FIG.
REFERENCES:
patent: 4040145 (1977-08-01), Marzoli
patent: 4595149 (1986-06-01), Hergeth
patent: 4771513 (1988-09-01), Pinto et al.
patent: 4854507 (1989-08-01), Smith
patent: 5175909 (1993-01-01), Pinto
Lucassen Guenter
Pinto Akiva
Schmidt Reinhard
Hergeth Hollingsworth GmbH
Husar John M.
Rosenbaum Mark
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