Arrangement for comminuting scrap in ribbon or strip form from,

Details Arrangement for comminuting scrap in ribbon or strip form from, Arrangement for comminuting scrap in ribbon or strip form from,

1987-03-31

1988-05-17

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

Combined or convertible

241224, 241235, 241290, B02C 1824

Patent

active

047445319

DESCRIPTION:

BRIEF SUMMARY
The invention relates to an arrangement for comminuting scrap in ribbon or strip form, for example, from steel plate, into short sections. Such scrap or waste strips are obtained, for example, in splitting, trimming, stamping, etc. installations.
Previously known comminuting arrangements for such ribbon- or strip-shaped scrap have a rotor, which is equipped at its periphery with several tools, for example, with four knives, and which works together with a stationary counterknife. The scrap is comminuted into short sections, in each case by knocking off the section from the ribbon or strip. This is associated with much noise and therefore frequently, no longer permitted by the authorities today from the point of view of noise protection. In these cases, there has already been a changeover to rolling up and tying off the ribbons or strips, obtained as scrap, and to dispose of them as so-called scrap coils. This is, however, associated with a considerable expense for equipment, handling, storage and transport for the plants, in which this scrap is obtained.
It is therefore a primary object of the invention to provide a noise-reduced comminuting arrangement for the ribbon- or strip-shaped scrap in question, which moreover, while of simple construction, can also process materials of different thickness without any readjustment.
The comminuting arrangement of the invention operates very quietly owing to the fact there no longer is any knocking off or chopping off, but rather a shearing off with a shearing cut. An almost silent operation can be achieved by means of the advantageously provided holding-down cushion. No readjustment of the knives is required for different material thicknesses, for example, from 0.5 to 5 mm, since the cutting gap is adjusted automatically to the respective ribbon thickness. Moreover, owing to the fact that the knives unroll in opposite directions and produce a shearing cut, they sharpen one another so that their serviceable life is long. Moreover, the knives can be exchanged and reground (circular grinding machine) easily. The knives need not be adjusted individually; rather, by loosening the conical adapter bushing and turning the first rotor, an adjustment equally accurate for all knives is achieved.
The object of the invention is described in greater detail below by means of an example of the operation shown in the accompanying drawings.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partially cut away view of the comminuting arrangement taken approximately along the line I--I of FIG. 2;
FIG. 2 is a cross sectional view taken approximately along the line II--II of FIG. 1;
FIG. 3 is a partial view similar to that of FIG. 1 but on an enlarged scale of a modified embodiment; and
FIG. 4 is a cross sectional view taken approximately along the line IV--IV of FIG. 3.


DESCRIPTION OF THE PREFERRED EMBODIMENTS

In a housing part or support means 1, two shafts 2 and 3 are rotatably supported with a fixed distance between axes. On the shafts 2, 3, which are disposed parallel to one another and preferably, as shown, vertically on top of one another with their axes in horizontal alignment, two disk-shaped rotors 4 and 5 are mounted so that they cannot twist, the upper shaft 2 of the drawing carrying the first rotor 4 and the lower shaft 3 of the drawing the second rotor 5. The two rotors 4, 5 are disposed coplanar to one another and are driven synchronously to rotate in opposite directions (in the directions of the arrows of FIG. 1).
The two rotors 4, 5 are driven over two meshing toothed wheels or gear wheels 6 and 7, of which the toothed wheel 6, which drives the first rotor 4, is seated on shaft 2 so that it cannot twist and is driven directly by an electric motor or hydraulic motor or is coupled to and driven by the equipment producing the scrap strip. For securing the toothed wheel 6 on shaft 2, an easily detachable conical adapter bushing 8 is preferably provided, so that, after this bushing is loosened, the rotor 4 can be adjusted in the circumferential direction relative to the roto

REFERENCES:
patent: 773479 (1904-10-01), Cornell
patent: 3199798 (1965-08-01), Turner

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