Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1996-11-05
1998-08-11
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
241261, B02C 1922
Patent
active
057915725
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION AND PRIOR ART
The present invention is related to a device for disintegration of material according to the preamble of the appendent claim 1.
Such devices may be adapted for disintegration of, generally speaking, any material but hereinafter the particular case of disintegration of coarse material will be discussed for the purpose of illustrating the invention but in no way restrict the same. Such coarse material may for instance consist of tree stumps, peat, particle boards, bricks, industrial waste, cardboard and asphalt, which one desires to disintegrate mainly for recovery purposes, but also for producing, for example, fuel.
A device of this nature is previously known by the Swedish patent 8103696-4. The device described in this patent comprises axles placed beside each other, said axles being provided with first and second processing members in the form of a screw thread helically extending on the respective axle. The axles are caused to rotate in such directions, that a first axle, by means of its processing members, engages and seeks to displace material to be disintegrated in an axial direction relative to the processing members provided on the second axle, the latter processing members seeking to actuate, accordingly, the material in an opposite direction relative to the processing members arranged on the first axle. This means in practice that a first of the axles is rotated such that its processing members actuate the material in one axial direction and the second axle is rotated so that its processing members actuate the material in an opposite direction, although it theoretically would also be possible to rotate the axles so that the processing members of the different axles actuate the material in the same direction but with different speeds. This type of disintegration by means of axial actuation of the material in opposite directions and the combination of shearing, pressing, tearing and breaking movements obtained thereby involves in many cases a far more efficient disintegration of the material than by means of various previously known devices for disintegration by hammering or slitting of the material.
Thus, this device is basically very efficient for disintegration of most types of material, but it may experience difficulties to get hold of material having certain geometrical shapes for disintegration thereof by means of its processing members. This is primarily due for elongated material having relatively smooth surfaces, such as for example logs or rods tending to lie down on top of the adjacent processing members and slide or rotate thereon during rotation of the axles without entering into the real disintegration area between the first and second processing members. In order to initiate a disintegration of for instance a log it is often required that the log comprises a lug or similar projection, which can be engaged by some of the processing members so as to move the log into fractionation between the first and the second processing members.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a device capable of disintegrating material in an even more efficient manner than previously known devices of the nature mentioned by way of introduction, said device reducing or eliminating the above inconvenience of disintegration of material with certain shapes.
This object is achieved according to the invention by providing a device according to the enclosed claim 1.
Thanks to the provision of members actuating the material transversely to the axle, the material will be susceptible of being conveyed into the processing zone for axial actuation of the material between the first and second processing members for the wanted efficient disintegration in the preferable manner described hereinabove. In this way the material, which the processing members previously had difficulties in engaging, will be efficiently moved, on rotation of the axle, into a position, in which disintegration between the first and second processing members may start.
Acco
REFERENCES:
patent: 2717742 (1955-09-01), Weigham et al.
patent: 5622323 (1997-04-01), Krueger et al.
Rosenbaum Mark
Svedala-Arbra AB
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