EP0865825A1 - Method and apparatus for crushing-breaking long and slender weirs, runners, and other useless metal casting products - Google Patents
Method and apparatus for crushing-breaking long and slender weirs, runners, and other useless metal casting products Download PDFInfo
- Publication number
- EP0865825A1 EP0865825A1 EP97301799A EP97301799A EP0865825A1 EP 0865825 A1 EP0865825 A1 EP 0865825A1 EP 97301799 A EP97301799 A EP 97301799A EP 97301799 A EP97301799 A EP 97301799A EP 0865825 A1 EP0865825 A1 EP 0865825A1
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- EP
- European Patent Office
- Prior art keywords
- cutter device
- rocking
- runners
- casting products
- slender
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/025—Jaw clearance or overload control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/005—Crushing or disintegrating by reciprocating members hydraulically or pneumatically operated
Definitions
- the present invention relates to a method for crushing and breaking long and slender weirs, runners of casting products and useless casting products or the like (hereinafter all referred to as runners) and an apparatus therefor.
- the following methods and apparatus for crushing and breaking runners of casting products are known to the public.
- the first known breaking and crushing apparatus for runners and useless casting products utilizes an oil pressure cylinder, published in a publication of Japanese application for opposition No. Hei 8-205.
- the apparatus disclosed in this publication comprises a fixed cutter device installed in a frame and having a plurality of semi-cone shaped cutters disposed in a zig-zag fashion, a rocking cutter device installed in the frame and being rocked in the frame and having a plurality of semi-cone shaped cutters engaged face-to-face with the cutters on the fixed cutter device, a cylinder for rocking the rocking cutter device having a piston rod connected to an upper part of the rocking cutter device, and a discharge outlet for discharging broken-crushed casting products located below the fixed cutter device and the rocking cutter device.
- the second known apparatus is a jaw-crasher published in Japanese laid-open publication No. SHO 62-279848, the jaw-crusher in this apparatus comprising fixed teeth and movable teeth, the movable teeth being movable by a toggle joint.
- a movable plate is provided under the fixed teeth in order to prevent falling down of crushed objects.
- a discharge outlet of the jaw-crusher is closed and opened by the movable plate powered by an oil pressure cylinder.
- a third known apparatus is another breaking and crushing apparatus, published in Japanese laid-open publication No. SHO 60-241939, the breaking and crushing apparatus comprising a pushing member being rocked back and forth by a pushing means using a cylinder and having a plurality of plate shaped pushing cutters, and a wall (fixed member) having a plurality of plate shaped cutters engaged face-to-face with the pushing cutters of the pushing member.
- Useless casting products are crushed and broken by the pushing member and the fixed member. All of the crushed and broken useless casting products are caught by a movable plate located at the bottom of the apparatus, and the crushed and broken useless casting products are discharged by movement of the movable plate.
- runners having a long and slender shape supplied to the breaking and crushing apparatus tend to fall down and be discharged from the discharge outlet of the apparatus. Most of the runners having long and slender shape can not therefore be crushed and broken. Therefore, it is not possible for the apparatus to perform reliable and appropriate breaking and crushing of runners and the like.
- the jaw-crusher discloses a movable plate for preventing the crushed objects from falling through
- the movable plate is provided under the fixed teeth.
- the movable plate is movable independently of the movable teeth. Therefore, discharge of the crushed objects can not be carried out easily and reliably.
- an independent power source or the like is required in order to move the movable plate. Therefore, the structure of the jaw-crusher is more complex as well as more expensive.
- the movable plate is moved separate from movement of the pushing cutters. Therefore, movement of the movable plate and the pushing cutters are independent of each other. Therefore, discharge of the crushed objects can not be carried out easily and reliably. Furthermore, an independent power source or the like is required in order to move the movable plate. Therefore, the structure of the jaw-crusher is more complex as well as more expensive.
- the method includes reliably catching the crushed and broken products and discharging them smoothly and automatically.
- a method for crushing and breaking weirs, runners of casting products and useless casting products sequentially by supplying the weirs, the runners of casting products and the useless casting products into a space formed between a fixed cutter device having a plurality of cone or semi-cone shaped cutters and a rocking cutter device having a plurality of cone or semi-cone shaped cutters engaged face-to-face with the cone or semi-cone shaped cutters of the fixed cutter device, characterized by the following sequential steps:
- the present invention also aims to provide an apparatus which can smoothly break and crush long and slender runners generated during or after a casting process at a foundry, the apparatus catching the crushed and broken products and discharging them smoothly and reliably.
- a crushing and breaking apparatus for long and slender weirs, runners of casting products and long and slender useless casting products comprises:
- Fig. 1 is a perspective view showing the overall structure of the crushing and breaking apparatus according to the present invention.
- Fig. 2 is a cross-sectional view showing the important features of the apparatus.
- Fig. 3 is a plane view showing the overall structure of the crushing and breaking apparatus, when the rocking cutter device is in its back-most position.
- Fig. 4 is a plane view showing the overall structure of the crushing and breaking apparatus, when the rocking cutter device is in its foremost position.
- Fig. 5 is a side view showing the fulcrum shaft with partial cutaway.
- Fig. 6 is an enlarged view of a bearing box.
- Fig. 7 is a view of the cutters when the rocking cutter is in its back-most position.
- Fig. 8 is a view of the cutters when the rocking cutter device is moved forwardly.
- Fig. 9 is a view of the cutters when the rocking cutter device is moved backwardly.
- Fig. 10 is a view of the cutters when the rocking cutter device is in its foremost position.
- An embodiment of the present invention (an overall mechanism of crushing and breaking of runners and discharging the crushed and broken runners) will be described hereunder.
- long and slender runners are supplied to a space (hereinafter referred to as crushing-breaking space) formed between a rocking plate of a rocking cutter device 7 positioned in the back-most position through a contraction of a piston rod 91 of a cylinder and a fixed plate 6 composing a fixed cutter device.
- the long and slender runners supplied to the crushing-breaking space are caught by a damper plate 4 provided on the rocking cutter device 7 (See Fig. 7).
- the long and slender runners are thus held in the crushing-breaking space thus formed. Therefore, the long and slender runners are not discharged through a discharge outlet 5 formed between a lower part of the fixed cutter device and the rocking cutter device.
- crushed-broken runners fall down to the lower part of the apparatus by slipping over the upper surfaces of the cutters of both the fixed cutter device and the rocking cutter device and through the gaps between the cutters of both the cutter devices (see Fig. 8).
- crushed-broken runners which have fallen down to the lower part of the apparatus are discharged through the discharge outlet 5 formed between the lower part of the fixed cutter device 6 and the rocking cutter 7 device when the rocking cutter device is moved backwardly after reaching its foremost position.
- Other crushed-broken runners are still in the crushing-breaking space and on the damper plate (see Fig. 9). Thereafter, the gap between cutters is narrowed as a result of forward movement of the rocking cutter device 7 through the extension of the piston rod 91.
- the crushed-broken runners are further crushed and broken into smaller pieces by the forward movement and are discharged through the discharge outlet as a result of slipping over the upper surfaces of the cutters and down the gap between the cutters (see Fig. 10).
- the runners which have fallen down to the bottom of the apparatus as a result of widening the gap between the cutters by a backward movement of the rocking cutter device through the contraction of the piston rod are caught by damper plate.
- the rocking cutter device is located in a position shown in Fig. 7 (initial position) when the rocking cutter device is moved to its back-most position. Thereafter, the operation described above is carried out, and the same phenomena are observed.
- the operation described above shows just an example of various ways of operation.
- automatic controls include a control based on contact, a control based on numerical values, a control based on detection, or a control using a computer for achieving accuracy of the control.
- switches such as limit switches or the like, counters and sensors and the like are used for carrying out the control based on contact and the computer control.
- the apparatus of the present invention may employ automatic control by automatically stopping the piston rod of the cylinder in response to a signal from pressure sensors and automatically restarting the piston after the automatic stop.
- the apparatus in the present invention comprises all the features required for carrying out optimum crushing and breaking and for accomplishing efficient and stable crushing and breaking as well as ensuring proper operation.
- the fulcrum is supported by bearing boxes 81.
- the bearing boxes are inserted into slots 82 formed in a pair of side frames of the apparatus through a plurality of spacers.
- the position of the bearing boxes can be shifted by changing the number of the spacers.
- Both the fixed cutter device and the rocking cutter device are provided on a frame consisting of two side plates 2 and 2a.
- An inlet 3 for input of the long and slender runners W, and the damper plate 4 for catching the runners W are provided between the fixed cutter device and the rocking cutter device installed in the frame.
- a gap S1 formed between a lower part of the fixed cutter device and the rocking cutter device is closed when the rocking cutter device is in its back-most position (see Fig. 3, Fig. 7 and Fig. 9).
- a discharge outlet 5 for discharging crushed-broken runners W2 is formed between the damper plate 4 and the fixed cutter device when the rocking cutter device approaches the fixed cutter device (see Fig. 10).
- the size of the discharge outlet 5 can be changed on demand by adjusting the length of the damper plate 4 or by shifting the bearing boxes 81 described later.
- the apparatus can be operated with high efficiency even when size, quantity, property and other factors of the crushed-broken runners has been changed.
- the damper plate 4 is moved so as to trace an arc of circle. In accordance with the movement, discharge of the crushed-broken runners is carried out smoothly, and the damper plate 4 is moved without a hitch.
- the fixed cutter device 6 is installed at one end of the frame 1.
- the fixed cutter device 6 comprises a base plate 61 fixed in the frame 1 and a plurality of semi-cone shaped cutters 62a disposed in a zig-zag fashion on a cutter attachment 62 attachable to the base plate 61.
- the length of the semi-cone shaped cutters 62a disposed on the cutter attachment 62 gradually increases from the upper part of the cutter attachment 62 to the lower part.
- the upper surfaces 62b of the cutters 62a (the slipping surfaces) are formed such that the crushed-broken runners W1 slip over the slipping surfaces.
- the rocking cutter device 7 is provided at almost the midpoint of the frame 1 and supported on a fulcrum shaft 8 so as to oppose the fixed cutter device 6.
- the rocking cutter device 7 comprises a rocking plate 71 rockable within the frame 1 and a plurality of semi-cone shaped cutters 72a disposed in a zig-zag fashion on a cutter attachment 72 attachable to the rocking plate 71.
- the upper surfaces 72b of the cutters 72a (the slipping surfaces) are formed such that the crushed-broken runners W1 slip over the slipping surfaces.
- the semi-cone shaped cutters 72a are formed in a tapered shape.
- the cutters 72a of the rocking cutter device 7 engage with the cutters 62a of the fixed cutter device, and the length of the semi-cone shaped cutters 72a gradually increases from the upper to the lower part of the cutter attachment 72.
- the fulcrum shaft 8 is supported by a couple of fulcrum bearing boxes 81, 81a.
- the fulcrum bearing boxes 81 are inserted into slots 82 formed in the pair of side plates 2, 2a of the frame 1 through a plurality of spacers 83 to 83n (hereinafter referred to as spacers 83).
- spacers 83 spacers 83
- the fulcrum shaft 8 is positioned at the center of the slot 82 when the same number of the spacers 83 are inserted into the both sides of the fulcrum bearing boxes 81 as shown in Fig. 1.
- the fulcrum shaft 8 is shifted toward the right hand side when additional spacers are inserted into left hand side of the fulcrum bearing boxes 81 (not shown). On the other hand, the fulcrum shaft 8 is shifted toward the left hand side when additional spacers are inserted into the right hand side of the fulcrum bearing boxes 81 (not shown).
- Each of the fulcrum bearing boxes 81 comprises a bush 811, a bearing 812, and a plurality of keys 813.
- a pair of bearing adjustment means 815 are provided on the side plates 2 of the frame to adjust the number of the spacers 83 inserted into either the left or right hand side of the fulcrum bearing boxes 81 in response to detected signals.
- the optimum crushing-breaking force can be applied to the rocking cutter device 7. Furthermore, less abrasion of both the semi-cone shaped cutters 62a of the fixed cutter device 6 and the semi-cone shaped cutter 72a of the rocking cutter device 7 occurs.
- the cylinder 9 is connected to the rocking plate 71 through a piston rod 91.
- the rocking cutter device 7 is pivoted around the fulcrum shaft 8 by contraction of the piston rod 91 of the cylinder 9.
- the rocking cutter device is pivoted forwardly and backwardly to the fixed cutter device 6.
- a large crushing-breaking force is supplied to the semi-cone shaped cutter 72a of the rocking cutter device 7 as a result of efficient conveyance of the pushing force of the cylinder, due to the piston rod 91 being connected to the upper part of the rocking cutter device 7.
- the lever and fulcrum principle is and utilized in the present invention. Therefore, crushing and breaking of the long and slender runners can be carried out smoothly and reliably regardless of the size of the runners.
- W shows long and slender runners
- W1 shows weirs, runners and other useless casting products
- W2 shows crushed-broken runners, crushed-broken weirs and crushed-broken useless casting products.
- the method of the present invention utilizes the following steps. Long and slender runners are supplied to the crushing-breaking space formed between the fixed cutter device having a plurality of semi-cone shaped cutters and a rocking cutter device having a plurality of semi-cone shaped cutters engaged face-to-face with the semi-cone shaped cutters of the fixed cutter device. A pushing force is applied to an upper part of the rocking cutter device, so that a large crushing-breaking force is applied to the cutters, after the runners supplied are caught by the damper plate, which is provided at a lower part of the rocking cutter device. The long and slender runners are crushed and broken by the force. The crushed-broken runners are then discharged from the discharge outlet formed between the fixed cutter device and the damper plate. The long and slender runners are caught by the damper plate, and the runners thus caught are crushed and are broken easily and quickly. In addition, there is no probability of discharging uncrushed or unbroken runners.
- the apparatus of the present invention allows the position of the fulcrum of the rocking cutter device within the slot formed in the side frames to be shifted. Therefore, it is possible to prevent abrasion of the cutters, realizing easy maintenance and accomplishing application of the optimum crushing-breaking force to the long and slender runners.
- the apparatus of the present invention is composed so as to crush and break the long and slender runners by engagement of the fixed cutter device and the rocking cutter device by pushing the upper part of the rocking cutter device having the damper plate by the cylinder. Therefore, the crushing-breaking apparatus in the present invention has the following advantages that the long and slender runners are always caught by the damper plate. Another advantage is that the apparatus can be formed in smaller size without extra cost because no independent power source for the damper plate is required. Thus, less room is required at the foundry. Further practical advantages such as facilitating and maintaining connection with other equipments such as conveyers or the like in the foundry are provided.
Abstract
A method for crushing-breaking of weirs,
runners of casting products and useless casting products
by supplying the runners etc into a space formed between
a fixed cutter device 6 having a plurality of semi-cone
shaped cutters and a rocking cutter device 7, having a
plurality of semi-cone shaped cutters engaged face-to-face
with the semi-come shaped cutters of the fixed
cutter device. The runners etc are caught by a damper
plate provided on the rocking cutter device. The rocking
cutter device is moved forwardly and backwardly at least
twice. The runners etc are crushed and broken in small
pieces by the cutters disposed on the fixed cutter device
and the rocking cutter device. The runners thus crushed
and broken are discharged from a discharge outlet and put
on a conveyer.
Description
The present invention relates to a method for
crushing and breaking long and slender weirs, runners of
casting products and useless casting products or the like
(hereinafter all referred to as runners) and an apparatus
therefor.
The following methods and apparatus for
crushing and breaking runners of casting products are
known to the public. The first known breaking and
crushing apparatus for runners and useless casting
products utilizes an oil pressure cylinder, published in
a publication of Japanese application for opposition No.
Hei 8-205. The apparatus disclosed in this publication
comprises a fixed cutter device installed in a frame and
having a plurality of semi-cone shaped cutters disposed
in a zig-zag fashion, a rocking cutter device installed
in the frame and being rocked in the frame and having a
plurality of semi-cone shaped cutters engaged face-to-face
with the cutters on the fixed cutter device, a
cylinder for rocking the rocking cutter device having a
piston rod connected to an upper part of the rocking
cutter device, and a discharge outlet for discharging
broken-crushed casting products located below the fixed
cutter device and the rocking cutter device.
The second known apparatus is a jaw-crasher
published in Japanese laid-open publication No. SHO 62-279848,
the jaw-crusher in this apparatus comprising
fixed teeth and movable teeth, the movable teeth being
movable by a toggle joint. A movable plate is provided
under the fixed teeth in order to prevent falling down of
crushed objects. A discharge outlet of the jaw-crusher
is closed and opened by the movable plate powered by an
oil pressure cylinder.
A third known apparatus is another breaking and
crushing apparatus, published in Japanese laid-open
publication No. SHO 60-241939, the breaking and crushing
apparatus comprising a pushing member being rocked back
and forth by a pushing means using a cylinder and having
a plurality of plate shaped pushing cutters, and a wall
(fixed member) having a plurality of plate shaped cutters
engaged face-to-face with the pushing cutters of the
pushing member. Useless casting products are crushed and
broken by the pushing member and the fixed member. All
of the crushed and broken useless casting products are
caught by a movable plate located at the bottom of the
apparatus, and the crushed and broken useless casting
products are discharged by movement of the movable plate.
In the first mentioned prior art, runners
having a long and slender shape supplied to the breaking
and crushing apparatus tend to fall down and be
discharged from the discharge outlet of the apparatus.
Most of the runners having long and slender shape can not
therefore be crushed and broken. Therefore, it is not
possible for the apparatus to perform reliable and
appropriate breaking and crushing of runners and the
like.
In the second mentioned prior art, although the
jaw-crusher discloses a movable plate for preventing the
crushed objects from falling through, the movable plate
is provided under the fixed teeth. The movable plate is
movable independently of the movable teeth. Therefore,
discharge of the crushed objects can not be carried out
easily and reliably. Furthermore, an independent power
source or the like is required in order to move the
movable plate. Therefore, the structure of the jaw-crusher
is more complex as well as more expensive.
In the last mentioned prior art, the movable
plate is moved separate from movement of the pushing
cutters. Therefore, movement of the movable plate and
the pushing cutters are independent of each other.
Therefore, discharge of the crushed objects can not be
carried out easily and reliably. Furthermore, an
independent power source or the like is required in order
to move the movable plate. Therefore, the structure of
the jaw-crusher is more complex as well as more
expensive.
It is an aim of the present invention to
provide a method for smoothly breaking and crushing long
and slender runners generated during or after casting
process at a foundry. The method includes reliably
catching the crushed and broken products and discharging
them smoothly and automatically.
In accordance with the present invention there
is provided a method for crushing and breaking weirs,
runners of casting products and useless casting products
sequentially by supplying the weirs, the runners of
casting products and the useless casting products into a
space formed between a fixed cutter device having a
plurality of cone or semi-cone shaped cutters and a
rocking cutter device having a plurality of cone or semi-cone
shaped cutters engaged face-to-face with the cone or
semi-cone shaped cutters of the fixed cutter device,
characterized by the following sequential steps:
The present invention also aims to provide an
apparatus which can smoothly break and crush long and
slender runners generated during or after a casting
process at a foundry, the apparatus catching the crushed
and broken products and discharging them smoothly and
reliably.
In accordance with the present invention there
is provided a crushing and breaking apparatus for long
and slender weirs, runners of casting products and long
and slender useless casting products comprises:
Other features of the invention will become
more apparent upon a consideration of the following
description of the preferred embodiment of the present
invention, taken in conjunction with the accompanying
drawings.
Fig. 1 is a perspective view showing the
overall structure of the crushing and breaking apparatus
according to the present invention.
Fig. 2 is a cross-sectional view showing the
important features of the apparatus.
Fig. 3 is a plane view showing the overall
structure of the crushing and breaking apparatus, when
the rocking cutter device is in its back-most position.
Fig. 4 is a plane view showing the overall
structure of the crushing and breaking apparatus, when
the rocking cutter device is in its foremost position.
Fig. 5 is a side view showing the fulcrum shaft
with partial cutaway.
Fig. 6 is an enlarged view of a bearing box.
Fig. 7 is a view of the cutters when the
rocking cutter is in its back-most position.
Fig. 8 is a view of the cutters when the
rocking cutter device is moved forwardly.
Fig. 9 is a view of the cutters when the
rocking cutter device is moved backwardly.
Fig. 10 is a view of the cutters when the
rocking cutter device is in its foremost position.
An embodiment of the present invention (an
overall mechanism of crushing and breaking of runners and
discharging the crushed and broken runners) will be
described hereunder.
As shown in Fig. 7, long and slender runners
are supplied to a space (hereinafter referred to as
crushing-breaking space) formed between a rocking plate
of a rocking cutter device 7 positioned in the back-most
position through a contraction of a piston rod 91 of a
cylinder and a fixed plate 6 composing a fixed cutter
device. The long and slender runners supplied to the
crushing-breaking space are caught by a damper plate 4
provided on the rocking cutter device 7 (See Fig. 7).
The long and slender runners are thus held in the
crushing-breaking space thus formed. Therefore, the long
and slender runners are not discharged through a
discharge outlet 5 formed between a lower part of the
fixed cutter device and the rocking cutter device. The
long and slender runners held in the crushing-breaking
space are crushed and are broken one after another in a
gap formed between cutters disposed on both of the
rocking cutter device and the fixed cutter device when
the rocking cutter device is moved toward the fixed
cutter device through an extension of the piston rod.
The runners thus crushed and broken (hereinafter referred
to as crushed-broken runners) fall down to the lower part
of the apparatus by slipping over the upper surfaces of
the cutters of both the fixed cutter device and the
rocking cutter device and through the gaps between the
cutters of both the cutter devices (see Fig. 8). The
crushed-broken runners which have fallen down to the
lower part of the apparatus are discharged through the
discharge outlet 5 formed between the lower part of the
fixed cutter device 6 and the rocking cutter 7 device
when the rocking cutter device is moved backwardly after
reaching its foremost position. Other crushed-broken
runners are still in the crushing-breaking space and on
the damper plate (see Fig. 9). Thereafter, the gap
between cutters is narrowed as a result of forward
movement of the rocking cutter device 7 through the
extension of the piston rod 91. The crushed-broken
runners are further crushed and broken into smaller
pieces by the forward movement and are discharged through
the discharge outlet as a result of slipping over the
upper surfaces of the cutters and down the gap between
the cutters (see Fig. 10). The runners which have fallen
down to the bottom of the apparatus as a result of
widening the gap between the cutters by a backward
movement of the rocking cutter device through the
contraction of the piston rod are caught by damper plate.
The rocking cutter device is located in a position shown
in Fig. 7 (initial position) when the rocking cutter
device is moved to its back-most position. Thereafter,
the operation described above is carried out, and the
same phenomena are observed. The operation described
above shows just an example of various ways of operation.
In order to control strokes of the piston, the
number of the strokes in a certain period of time and the
operation procedure, a number of control methods can be
employed. For instance, automatic controls include a
control based on contact, a control based on numerical
values, a control based on detection, or a control using
a computer for achieving accuracy of the control.
Various switches such as limit switches or the like,
counters and sensors and the like are used for carrying
out the control based on contact and the computer
control. By employing the control methods stated above,
optimum operation of the apparatus can be carried out in
accordance with the size of the runners supplied to the
apparatus, quantity of the runners, property of the
runners and the like, as well as ensuring proper
operation. In addition, the apparatus of the present
invention may employ automatic control by automatically
stopping the piston rod of the cylinder in response to a
signal from pressure sensors and automatically restarting
the piston after the automatic stop. The apparatus in
the present invention comprises all the features required
for carrying out optimum crushing and breaking and for
accomplishing efficient and stable crushing and breaking
as well as ensuring proper operation.
An example of how to shift the position of the
fulcrum of the rocking cutter device is described with
reference to Fig. 2. The fulcrum is supported by bearing
boxes 81. The bearing boxes are inserted into slots 82
formed in a pair of side frames of the apparatus through
a plurality of spacers. The position of the bearing
boxes can be shifted by changing the number of the
spacers.
Both the fixed cutter device and the rocking
cutter device, described in detail later, are provided on
a frame consisting of two side plates 2 and 2a. An inlet
3 for input of the long and slender runners W, and the
damper plate 4 for catching the runners W are provided
between the fixed cutter device and the rocking cutter
device installed in the frame. A gap S1 formed between a
lower part of the fixed cutter device and the rocking
cutter device is closed when the rocking cutter device is
in its back-most position (see Fig. 3, Fig. 7 and Fig.
9). A discharge outlet 5 for discharging crushed-broken
runners W2 is formed between the damper plate 4 and the
fixed cutter device when the rocking cutter device
approaches the fixed cutter device (see Fig. 10). The
size of the discharge outlet 5 can be changed on demand
by adjusting the length of the damper plate 4 or by
shifting the bearing boxes 81 described later. Thus, the
apparatus can be operated with high efficiency even when
size, quantity, property and other factors of the
crushed-broken runners has been changed. The damper
plate 4 is moved so as to trace an arc of circle. In
accordance with the movement, discharge of the crushed-broken
runners is carried out smoothly, and the damper
plate 4 is moved without a hitch.
The fixed cutter device 6 is installed at one
end of the frame 1. The fixed cutter device 6 comprises
a base plate 61 fixed in the frame 1 and a plurality of
semi-cone shaped cutters 62a disposed in a zig-zag
fashion on a cutter attachment 62 attachable to the base
plate 61. The length of the semi-cone shaped cutters 62a
disposed on the cutter attachment 62 gradually increases
from the upper part of the cutter attachment 62 to the
lower part. The upper surfaces 62b of the cutters 62a
(the slipping surfaces) are formed such that the crushed-broken
runners W1 slip over the slipping surfaces. In
order to engage the fixed cutter device 6 with the
rocking cutter device, spaces are formed between adjacent
semi-cone shaped cutters 62a disposed in a zig-zag
fashion on the fixed cutter device 6. Also, clearances
are formed for the crushed-broken runners W1 to fall down
to the lower part of the apparatus when the fixed cutter
device 6 is engaged with the rocking cutter device.
The rocking cutter device 7 is provided at
almost the midpoint of the frame 1 and supported on a
fulcrum shaft 8 so as to oppose the fixed cutter device
6. The rocking cutter device 7 comprises a rocking plate
71 rockable within the frame 1 and a plurality of semi-cone
shaped cutters 72a disposed in a zig-zag fashion on
a cutter attachment 72 attachable to the rocking plate
71. The upper surfaces 72b of the cutters 72a (the
slipping surfaces) are formed such that the crushed-broken
runners W1 slip over the slipping surfaces. The
semi-cone shaped cutters 72a are formed in a tapered
shape. The cutters 72a of the rocking cutter device 7
engage with the cutters 62a of the fixed cutter device,
and the length of the semi-cone shaped cutters 72a
gradually increases from the upper to the lower part of
the cutter attachment 72.
The fulcrum shaft 8 is supported by a couple of
fulcrum bearing boxes 81, 81a. The fulcrum bearing boxes
81 are inserted into slots 82 formed in the pair of side
plates 2, 2a of the frame 1 through a plurality of
spacers 83 to 83n (hereinafter referred to as spacers
83). Thus, the position of the fulcrum bearing boxes 81
can be shifted by changing the number of the spacers 83
inserted into the slots. The fulcrum shaft 8 is
positioned at the center of the slot 82 when the same
number of the spacers 83 are inserted into the both sides
of the fulcrum bearing boxes 81 as shown in Fig. 1. The
fulcrum shaft 8 is shifted toward the right hand side
when additional spacers are inserted into left hand side
of the fulcrum bearing boxes 81 (not shown). On the
other hand, the fulcrum shaft 8 is shifted toward the
left hand side when additional spacers are inserted into
the right hand side of the fulcrum bearing boxes 81 (not
shown). Each of the fulcrum bearing boxes 81 comprises a
bush 811, a bearing 812, and a plurality of keys 813.
Thus, it is possible for the fulcrum bearing boxes 81 to
prevent abrasion of the fulcrum shaft 8, realizing easy
maintenance and the like. Movement of the fulcrum shaft
8 is carried out automatically using a load on the
fulcrum shaft 8 detected by a sensor 814. A pair of
bearing adjustment means 815 are provided on the side
plates 2 of the frame to adjust the number of the spacers
83 inserted into either the left or right hand side of
the fulcrum bearing boxes 81 in response to detected
signals. Thus, in the apparatus of the present
invention, the optimum crushing-breaking force can be
applied to the rocking cutter device 7. Furthermore,
less abrasion of both the semi-cone shaped cutters 62a of
the fixed cutter device 6 and the semi-cone shaped cutter
72a of the rocking cutter device 7 occurs.
The cylinder 9 is connected to the rocking
plate 71 through a piston rod 91. The rocking cutter
device 7 is pivoted around the fulcrum shaft 8 by
contraction of the piston rod 91 of the cylinder 9. The
rocking cutter device is pivoted forwardly and backwardly
to the fixed cutter device 6. A large crushing-breaking
force is supplied to the semi-cone shaped cutter 72a of
the rocking cutter device 7 as a result of efficient
conveyance of the pushing force of the cylinder, due to
the piston rod 91 being connected to the upper part of
the rocking cutter device 7. In other words, the lever
and fulcrum principle is and utilized in the present
invention. Therefore, crushing and breaking of the long
and slender runners can be carried out smoothly and
reliably regardless of the size of the runners. In the
drawings, W shows long and slender runners, W1 shows
weirs, runners and other useless casting products, and W2
shows crushed-broken runners, crushed-broken weirs and
crushed-broken useless casting products.
The method of the present invention utilizes
the following steps. Long and slender runners are
supplied to the crushing-breaking space formed between
the fixed cutter device having a plurality of semi-cone
shaped cutters and a rocking cutter device having a
plurality of semi-cone shaped cutters engaged face-to-face
with the semi-cone shaped cutters of the fixed
cutter device. A pushing force is applied to an upper
part of the rocking cutter device, so that a large
crushing-breaking force is applied to the cutters, after
the runners supplied are caught by the damper plate,
which is provided at a lower part of the rocking cutter
device. The long and slender runners are crushed and
broken by the force. The crushed-broken runners are then
discharged from the discharge outlet formed between the
fixed cutter device and the damper plate. The long and
slender runners are caught by the damper plate, and the
runners thus caught are crushed and are broken easily and
quickly. In addition, there is no probability of
discharging uncrushed or unbroken runners.
The apparatus of the present invention allows
the position of the fulcrum of the rocking cutter device
within the slot formed in the side frames to be shifted.
Therefore, it is possible to prevent abrasion of the
cutters, realizing easy maintenance and accomplishing
application of the optimum crushing-breaking force to the
long and slender runners.
Further to the above, the apparatus of the
present invention is composed so as to crush and break
the long and slender runners by engagement of the fixed
cutter device and the rocking cutter device by pushing
the upper part of the rocking cutter device having the
damper plate by the cylinder. Therefore, the
crushing-breaking apparatus in the present invention has
the following advantages that the long and slender
runners are always caught by the damper plate. Another
advantage is that the apparatus can be formed in smaller
size without extra cost because no independent power
source for the damper plate is required. Thus, less room
is required at the foundry. Further practical advantages
such as facilitating and maintaining connection with
other equipments such as conveyers or the like in the
foundry are provided.
While the invention has been described in its
preferred embodiments, it is to be understood that the
words which have been used are words of description
rather than limitation and that changes within the
purview of the appended claims may be made without
departing from the true scope of the invention.
Claims (2)
- A method for crushing and breaking weirs, runners of casting products and useless casting products sequentially by supplying the weirs, the runners of casting products and the useless casting products into a space formed between a fixed cutter device having a plurality of cone or semi-cone shaped cutters and a rocking cutter device having a plurality of cone or semi-cone shaped cutters engaged face-to-face with the cone or semi-cone shaped cutters of the fixed cutter device, characterized by the following sequential steps:catching long and slender weirs, runners of casting products and long and slender useless casting products in the weirs, the runners and the useless casting products supplied into the space by a damper means attached to the rocking cutter device,moving the rocking cutter device forwardly and backwardly at least twice by contraction and extension of a piston rod of a cylinder,crushing and breaking the long and slender weirs, runners of casting products and the long and slender useless casting products caught between the fixed cutter device and the rocking cutter device,discharging the crushed-broken long and slender weirs, runners of casting products and the crushed-broken long and slender useless casting products in a direction toward the fixed cutter device via a discharge outlet formed between the fixed cutter device and the damper means over upper surfaces of the cutters of both the fixed cutter device and the rocking cutter device and through clearances formed between the cutters of the fixed cutter device and the rocking cutter device.
- A crushing and breaking apparatus for long and slender weirs, runners of casting products and long and slender useless casting products comprising:a frame (1) having only side plates (2),a fixed cutter device (6) provided in the frame, having a plurality of cone or semi-cone shaped cutters,a rocking cutter device (7) provided in the frame having a plurality of cone or semi-cone shaped cutters disposed in a zig-zag fashion so as to be offset relative to the cone or the semi-cone shaped cutters of the fixed cutter device (6) engaged face-to-face to the fixed cutter device, and mounted for rocking pivotally,a damper plate (4) provided on the rocking cutter device for closing a gap formed between a lower part of the fixed cutter device and a lower part of the rocking cutter device,a bearing (81) having a fulcrum shaft (8) providing pivotal rocking of the rocking cutter device,bearing adjustment means (815) for adjusting forward and backward movement of the bearing,a cylinder (9) having a piston rod connected to an upper part of the rocking cutter device,a rocking adjustment means for adjusting forward and backward movement of the piston rod (91) of the cylinder, anda discharge outlet (5) formed between a lower part of the fixed cutter device (6) and the damper plate (4) of the rocking means, the discharge outlet discharging crushed and broken long and slender weirs, runners of casting products and crushed and broken long and slender useless casting products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97301799A EP0865825A1 (en) | 1997-03-18 | 1997-03-18 | Method and apparatus for crushing-breaking long and slender weirs, runners, and other useless metal casting products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97301799A EP0865825A1 (en) | 1997-03-18 | 1997-03-18 | Method and apparatus for crushing-breaking long and slender weirs, runners, and other useless metal casting products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0865825A1 true EP0865825A1 (en) | 1998-09-23 |
Family
ID=8229249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97301799A Withdrawn EP0865825A1 (en) | 1997-03-18 | 1997-03-18 | Method and apparatus for crushing-breaking long and slender weirs, runners, and other useless metal casting products |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0865825A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0919283A1 (en) * | 1997-11-28 | 1999-06-02 | Yasuaki Okuya | An apparatus for crushing-breaking useless casting products using a fixed and a rocking cutter device and method for coating said cutting devices |
| EP1228805A1 (en) * | 2001-02-01 | 2002-08-07 | Yasuaki Okuya | Method and apparatus for crushing-breaking of casting products and cutter arrangement therefor |
| WO2004014558A1 (en) * | 2002-08-07 | 2004-02-19 | Bl-Pegson Limited | Crusher assembly |
| US7086620B2 (en) | 2003-09-18 | 2006-08-08 | Yasuaki Okuya | Aluminum shearing apparatus |
| EP1724044A1 (en) | 2005-05-20 | 2006-11-22 | Yuatsuki Co., Ltd | Method and apparatus for making a product from aluminium waste |
| EP2599549A1 (en) * | 2006-07-18 | 2013-06-05 | Yasuaki Okuya | Other side tool support base and/or other side tool post mounted to casting breaking apparatus, and bearing of the other side tool support base |
| TWI473679B (en) * | 2009-04-09 | 2015-02-21 | Hirado Kinzoku Kogyo Co Ltd | Runner crushing device |
| CN113492027A (en) * | 2020-04-07 | 2021-10-12 | 哈尔滨科德威冶金股份有限公司 | Vermicular cast iron box type structural part crushing equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0919283A1 (en) * | 1997-11-28 | 1999-06-02 | Yasuaki Okuya | An apparatus for crushing-breaking useless casting products using a fixed and a rocking cutter device and method for coating said cutting devices |
| EP1228805A1 (en) * | 2001-02-01 | 2002-08-07 | Yasuaki Okuya | Method and apparatus for crushing-breaking of casting products and cutter arrangement therefor |
| WO2004014558A1 (en) * | 2002-08-07 | 2004-02-19 | Bl-Pegson Limited | Crusher assembly |
| US7086620B2 (en) | 2003-09-18 | 2006-08-08 | Yasuaki Okuya | Aluminum shearing apparatus |
| EP1724044A1 (en) | 2005-05-20 | 2006-11-22 | Yuatsuki Co., Ltd | Method and apparatus for making a product from aluminium waste |
| EP2599549A1 (en) * | 2006-07-18 | 2013-06-05 | Yasuaki Okuya | Other side tool support base and/or other side tool post mounted to casting breaking apparatus, and bearing of the other side tool support base |
| TWI473679B (en) * | 2009-04-09 | 2015-02-21 | Hirado Kinzoku Kogyo Co Ltd | Runner crushing device |
| CN113492027A (en) * | 2020-04-07 | 2021-10-12 | 哈尔滨科德威冶金股份有限公司 | Vermicular cast iron box type structural part crushing equipment |
| CN113492027B (en) * | 2020-04-07 | 2023-02-24 | 哈尔滨科德威冶金股份有限公司 | Vermicular cast iron box type structural part crushing equipment |
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