Abstrict The crusher of the present invention is for crushing metal blocks
obtained by compressing abandoned cars and metal scraps, where the
inside of the casing having a discharge opening is equipped with
pressing rolls in the upper part, a crushing roll arranged in the
middle below the pressing rolls and a pressing body arranged close
to the crushing roll, where the pressing rolls and the crushing
roll are provided with blades protruding from the circumference,
while the pressing body is provided with pressing blades on its
circumference near the crushing roll and is arranged so that it
can freely come closer to or away from the crushing roll.
Crusher claims
We claim:
1. A crusher comprising a casing having an inlet opening and a
discharge opening, a pair of pressing rolls horizontally disposed
in the upper part of the interior of the casing, a crushing roll
disposed in the middle below the pressing rolls so that the pressing
rolls and the crushing roll from an inverted triangle and a pressing
body arranged close to and below the crushing the roll, the pressing
rolls and the crushing roll being provided with radially protruding
blades on the circumference thereof and having freedom of rotation,
the pressing body being equipped with pressing blades in the circumference
thereof near the crushing roll and arranged so that the pressing
body can freely come close to or back away from the crushing roll,
the pressing rolls and crushing roll being provided with driving
and rotating means, and the pressing body being provided with driving
means for moving close to and away from the crushing roll.
2. A crusher according to claim 1 wherein the pressing rolls are
able to rotate in both directions.
3. A crusher according to claim 1 wherein the revolution speed
of the pressing rolls are different with each other.
Description BRIEF SUMMARY OF THE INVENTION
In the conventional way of recycling large-sized metal scraps,
the scraps were in the first place as a preparatory step cut into
prescribed size by means of a shearing machine and then the cut
blocks were crushed into finished metal scraps.
However, the way to cut as a preparatory treatment the large-sized
metal scrap blocks by using a shearing machine produces cut scraps
bigger in volume than a certain convenient size. Therefore, it is
necessary to further crush the bigger-sized metal scraps to smaller
size proper to be used finally as recycled scraps. Accordingly,
the crusher required for this purpose must be big in size and lead
to high cost in scrap crushing.
The object of this invention is, therefore, to present a crusher
that is able to crush large-sized metal scraps roughly as a preparatory
treatment to the size smaller than the size provided by the conventional
shearing machine. As a result the crusher proper that is used for
making chips from the metal scraps as a final stage can be smaller
in size and functions as effective tool for cost reduction.
The characteristics of the present invention lie in that a pair
of pressing rolls are arranged inside the crusher casing having
an opening, a crushing roll being provided in the middle below the
pressing rolls so that the pressing rolls and the crushing roll
form an inverted triangle, a pressing body being arranged against
the crushing roll so that it can freely come closer to or away from
the crushing roll.
For this reason, the present invention makes it possible to crush
large-sized metal scraps into a size smaller than the conventional
way of using a machine, and thus to make smaller the size of the
crusher proper for finally making chips from metal scraps, and is
effective for achieving cost reduction.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
FIG. 1 is a sectional view and
FIG. 2 is a sectional view according to the line II--II of FIG.
1.
DETAILED DESCRIPTION
A present invention relates to the crusher to be used for crushing
metal blocks made from the compression, for instance, of the abandoned
cars, metal scraps, etc.
As shown in FIG. 1 the crusher casing 1 has on its upper end an
inlet opening 11 which is equipped with a bracket protruding on
its upper end on the right hand side, through which the chute 2
is supported on the shaft in the way that allows free rotation.
The chute 2 is supported horizontally by being contact fit on the
upper surface of the support column 3 and the metal scraps are fed
when the machine is in this position. Further, a bracket 21 is provided
in the rear surface of chute 2 and also the lower end of the side
of the crusher casing 1 has a protruding bracket 13 where the end
of oil hydraulic cylinder 4 is connected to the bracket 13 with
freedom of rotation, Ram end of the oil hydraulic cylinder 4 is
connected to the bracket 21 with freedom of rotation. Therefore,
by feeding working oil to the oil hydraulic cylinder 4 the chute
2 is driven to pivot along the center of bracket 21.
The inside construction of the crusher casing 1 is described as
follows. The upper part of the casing is equipped with a pair of
pressing roll 5 5a horizontally arranged, where both ends of the
roll shaft 51 51a of the pressing rolls are supported by the casing
in the manner that the rolls can rotate freely, and further, it
is so constructed that the rotating power of the driving motor (not
shown in the drawing) can be transmitted to these roll shafts, which,
as a result can be rotated in both directions but are rotated only
in the inward direction when used for scrap crushing.
As shown in FIG. 2 the pressing rolls 5 5a are so constructed
that large roll plates 53 53a have on their circumference a multiple
of radially arranged pressing blades 52 52a (7 pieces in the case
of FIG. 2) as well as smaller roll plates 54 54a having a diameter
smaller than large roll plates and arranged alternately therebetween.
For this purpose, the pressing blades 52 52a are so arranged as
to have a certain distance with each other in the axial direction
of the rolls 5 5a. Further, the relative position of the large
roll plates 53 and 53a that have pressing blades as well as the
relative position of the small roll plates 54 and 54a are so arranged
that the end part of the pressing blade 52 52a come closest to
the opposite roll plate 54 54a. The shape of both front and rear
ends of the pressing blades 52 52a are formed to have a sharp edge
and is hexagonal as a whole. Further, the blades of chasing plates
14 14a protruding inward from the inner wall of the crusher casing
extend in the clearance between the pressing blades 52 52a of pressing
rolls 5 5a, i.e. the blades intermesh.
Further, as shown in FIG. 1 a crushing roll 6 is positioned in
the middle below the engaging parts of the pressing rolls 5 5a.
The pressing rolls on the upper side and the crushing roll on the
lower side form, as an inverted whole, a triangle. The crushing
roll 6 is driven and rotated by the rotary shaft 61 and is constructed
in the same way as the pressing rolls 5 5a and equipped with the
crushing rolls extending radially at a prescribed distance on the
circumference of the roll.
Further, below the crushing roll 6 is positioned a pressing body
7. The shaft 71 one end of which is fixed to the pressing body,
protrudes to the outside of the crusher casing 1. The outer end
73 of the shaft 73 is fixed 22 an end of the driving lever 72 the
base end of which is supported to the crusher casing 1 which pivots
about shaft end 73. Also, ram end of the oil hydraulic cylinder
8 is connected to the lower face of the driving lever 72. The oil
hydraulic cylinder is supported with freedom of rotation by the
bracket 9 arranged on the bottom outside the crusher casing 1. The
bottom of the crusher casing 1 forms a discharge opening 15.
Next, the function of metal scrap crushing is described according
to the present invention.
Metal scraps fed into the crusher casing 1 by the chute 2 from
the inlet opening 11 is put between the pressing rolls 5 5a respectively
rotating inward and is to some extent crushed in such a way that
it is deformed, bored and so on. In this case, if too much metal
scrap is put between the pressing rolls causing an overload, both
pressing rolls 5 5a are rotated in the reverse direction which
will solve the problem. The revolution speed of the pressing roll
5a of right hand side is set faster than the speed of the other
pressing roll 5 of the lefthand side, in order to increase the pressing
efficiency.
The metal scraps, crushed to some extent, are scattered by the
crushing roll 6 in its rotating direction and discharged from the
discharge opening 15. The revolution speed of the crushing roll
6 is same as that of the pressing roll 5 and is slower than that
of the pressing roll 5a.
The metal scraps, that were not completely crushed by the crushing
roll 6 but were entangled with the crushing roll 6 are crushed
by the blade of the pressing body 7 and discharged from the discharge
opening 15. Further, the distance between the crushing roll 6 and
the pressing body 7 can be adjusted by the up and down movement
of the pressing body, that is to say, the crushing rate of metal
scraps can be adjusted. |