JP4117724B2 - Core sand processing equipment in centrifugal casting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In this invention, when a cast iron pipe centrifugally cast by a rotating mold is pulled out from the mold by a drawing carriage, core sand that has fallen from the mold end and scattered on the moving path of the drawing carriage is automatically removed. In particular, the present invention relates to a core sand processing apparatus in a centrifugal casting machine.
[0002]
[Prior art]
Centrifugal casting equipment for producing cast iron pipes, such as ductile cast iron pipes, includes a mold that rotates around its axis, a casting carriage that mounts the mold, a ladle for casting that supplies molten metal into the mold, It consists of a pouring bowl that pours the molten metal supplied from the pouring ladle into the mold, and the molten metal is supplied into the rotating mold from the tip of the pouring bowl inserted deep inside. However, the cast iron pipe is cast directly from the molten metal by moving the mold in the opposite direction of the ladle for casting by the casting cart and solidifying the injected molten metal sequentially.
[0003]
The cast iron pipe centrifugally cast as described above is drawn out from the mold by the drawing carriage. FIG. 4 is a schematic side view showing a state in which a cast iron pipe is pulled out from a mold by a drawing carriage. As shown in FIG. 4, a pulling carriage 3 having a pulling device 4 having a pulling arm 5 having a chucking claw 6 that can be opened and closed at the tip is disposed by a cylinder 7 so as to be able to move forward and backward.
[0004]
When the casting cart (not shown) reaches the retreat limit, the drawing cart 3 is moved toward the cast iron pipe 2 in the mold 1 and the chucking claw 6 is inserted into the cast iron pipe 2 from the receiving port 2a side. 6, the inner surface of the cast iron pipe 2 is gripped. Next, the drawing cart 3 is retracted in the X direction indicated by the arrow in FIG. 4 along the movement path 9, whereby the drawing force is transmitted from the chucking claw 6 to the cast iron pipe 2. It is pulled out from inside 1.
[0005]
When pulling out the cast iron pipe 2 from the mold 1 as described above, the following problems have conventionally occurred. That is, the end portion 2a of the cast iron pipe 2 to be cast is formed at the end of the cast iron pipe drawing side in the mold 1, and the inside of the mold 1 is prevented in order to prevent leakage of the molten metal supplied from the pouring rod. The child 22 is crimped. When the core 22 is damaged when the chucking claw 6 is inserted into the cast iron pipe 2 or the like, and the broken piece 22a of the core 22 pulls the cast iron pipe 2 from the mold 1 by the pulling device 4, FIG. As shown in FIG. 4, the material falls on the moving passage 9 of the extraction carriage 3, gets wet with water, becomes sandy, and is scattered. Therefore, after the cast iron pipe 2 is pulled out by the pulling carriage 3, the core sand that has fallen and scattered on the moving passage 9 must be collected and collected, which requires manpower and time, and requires a high temperature atmosphere. In addition to being a bad environment work below, the casting efficiency was reduced. In the present invention, the pieces 22a and the pieces 22a that have become wet when wet and become sandy are collectively defined as core sand.
[0006]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described problems, and the object of the present invention is to perform centrifugal casting of a cast iron pipe by a rotating mold, and at the time of drawing a cast iron pipe from a mold by a drawing carriage. To provide a core sand processing apparatus in a centrifugal casting machine capable of automatically scraping and collecting core sand that has fallen from an end of a mold and scattered on a drawing carriage moving path without requiring manual labor. It is in.
[0007]
[Means for Solving the Problems]
The core sand processing apparatus in the centrifugal casting machine according to the first aspect of the present invention for solving the above-mentioned problem is that when the cast iron pipe centrifugally cast by the rotating mold is pulled out from the mold by the pulling carriage, A core sand treatment device for scraping core sand that has fallen onto a drawing carriage moving passage, and is provided in the width direction at a lower portion of the drawing carriage and contacts the core sand on the drawing carriage movement passage. A first scraping plate for scraping it, and a core sand receiving groove provided below the rear end portion of the pulling carriage moving passage for storing the core sand scraped off by the first scraping plate, A second scraper for scraping core sand out of the core sand receiving groove, which is movably provided in the core sand receiving groove, and the second scraper plate in the length direction of the core sand receiving groove. And a drive mechanism for moving the .
[0008]
The core sand processing apparatus in the centrifugal casting machine according to the second invention is the first invention, wherein the first scraper is pivotally supported at the upper end by a pulling carriage and can be rotated in the vertical direction by a cylinder. It is characterized by becoming.
[0009]
The core sand processing apparatus in the centrifugal casting machine according to the third invention is the core sand scraped out from the core sand receiving groove at the open end of the core sand receiving groove in the first or second invention. The storage container is arranged.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the present invention will be described with reference to the drawings. 1 is a schematic side view showing an example of a core sand processing apparatus according to the present invention, FIG. 2 is a schematic plan view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
[0011]
As shown in the drawing, a floor plate 10 having rails 8 provided on both sides is laid in a moving passage 9 in which the extraction carriage 3 moves from the position of the forward limit X to the position of the backward limit Y. The drawing carriage 3 moves the moving path 9 along the rail 8 from the position of the forward limit X to the position of the backward limit Y by a cylinder mechanism (not shown), and during that time, a cast iron pipe is drawn from the mold by a drawing device (not shown). Pull out. Reference numeral 21 denotes a wheel of the drawing cart 3.
[0012]
A first scraper 11 for contacting the core sand falling on the floor plate 10 of the moving passage 9 and scraping it along with the movement of the pulling carriage 3 is provided at the lower part of one side end of the pulling carriage 3. In the width direction, that is, in the width direction of the floor plate 10 installed in the moving passage 9, the lower end edge thereof is provided in contact with the upper surface of the floor plate 10.
[0013]
The upper end of the first scraper plate 11 is pivotally attached to a bracket 13 attached to one side end of the extraction carriage 3 by a pin 12, and provided on the rear surface of the first scraper board 11 on the extraction carriage 3. The rod 14a of the cylinder 14 is attached to the shaft. Therefore, the operation of the cylinder 14 allows the first scraper plate 11 to rotate in the direction indicated by the dotted line in FIG.
[0014]
The floor plate 10 of the moving passage 9 is installed up to a position near the carriage retreat limit Y, and below the end of the floor board 10 near the carriage retreat limit Y, the first scraping plate 11 of the pulling carriage 3 from above the floor plate 10. A core sand receiving groove 15 for storing the scraped core sand is provided in the width direction so as to be orthogonal to the moving passage 9. Reference numeral 19 denotes a chute provided at the end of the floor plate 10 toward the core sand accommodating groove 15.
[0015]
The core sand receiving groove 15 is provided with a second scraping plate 16 in the width direction of the core sand receiving groove 15 for scraping the core sand that has fallen and accumulated therein. Reference numeral 17 denotes a rodless cylinder which is a drive mechanism for the second scraper 16, and the second scraper 16 is an operating shaft of the rodless cylinder 17 installed in the core sand accommodating groove 15 in its length direction. Are attached via brackets 18. Therefore, the second scraper 16 can be moved in the core sand accommodating groove 15 from one end side toward the multi-end side by the operation of the rodless cylinder 17. A container 20 that stores core sand scraped out from the core sand receiving groove 15 is disposed below the multi-end open end of the core sand receiving groove 15.
[0016]
Although the example of the rodless cylinder 17 has been described as the driving mechanism of the second scraper plate 16, the driving mechanism is not limited to the rodless cylinder 17, but a normal air cylinder, hydraulic cylinder, chain or sprocket drive, etc. Can be used. Moreover, you may install a conveyer etc. in the core sand accommodation groove | channel 15 right under the chute | shoot 19 without using the 2nd scraper board 16 itself.
[0017]
As described above, when the cast carriage moved while centrifugally casting the cast iron pipe reaches the retreat limit, the drawing carriage 3 located at that position grips the cast iron pipe in the mold, and FIG. As shown in FIG. 2, the moving passage 9 is moved from the position of the forward limit X to the position of the backward limit Y, and the cast iron pipe is pulled out from the mold. At that time, the core installed at the end of the mold is broken, a part of the broken piece falls on the moving path 9, and a part of the broken piece becomes sandy and is scattered.
[0018]
However, the core sand falling on the floor plate 10 of the moving passage 9 is scraped by the first scraper plate 11 provided at the lower end of one side end of the pulling cart 3 along with the movement of the pulling cart 3. From the end of the floor plate 10 near the carriage retreat limit Y, it is scraped off through a chute 19 into a core sand receiving groove 15 provided orthogonal to the moving passage 9.
[0019]
In this way, after the core sand on the floor plate 10 is scraped off by the first scraping plate 11, the first scraping plate 11 is rotated upward by the cylinder 14, and the pulling carriage 3 is moved to the position of the forward limit X. Return to. Then, in order to scrape the core sand on the moving passage 9 together with drawing the next cast iron pipe, the first scraping plate 11 is rotated downward by the cylinder 14 and is kept in contact with the floor plate 10 of the moving passage 9. .
[0020]
On the other hand, the core sand scraped off into the core sand accommodating groove 15 moves in the core sand accommodating groove 15 from one end side toward the multi-end side by the operation of the rodless cylinder 17. Thus, the core sand receiving groove 15 is scraped into the container 20 disposed below the open end on the multi-end side.
[0021]
After the core sand is scraped into the container 20 in this way, the second scraping plate 16 is returned to one end side of the core sand accommodating groove 15 for the next core sand scraping. Further, the container 20 for storing the scraped core sand is appropriately moved to another place by a crane or the like, and the core sand therein is discharged.
[0022]
The above-described forward and backward movement of the pulling cart 3, the core sand scraping on the moving passage 9 by the first scraper 11, and the core sand in the core sand receiving groove 15 by the second scraper 16 being scraped to the container 20 Etc. are all automatically performed by sensors and solenoid valves (not shown) provided at important points.
[0023]
【The invention's effect】
As described above, according to the core sand processing apparatus in the centrifugal casting machine of the present invention, when the cast iron pipe is centrifugally cast by the rotating mold, the end of the mold is drawn when the cast iron pipe is drawn from the mold by the drawing carriage. Core sand that has fallen from the part and scattered on the extraction carriage moving passage can be scraped and collected automatically without the need for manpower, thereby achieving production of a cast iron pipe with high productivity, An industrially beneficial effect is brought about.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an example of a core sand treatment apparatus according to the present invention.
FIG. 2 is a schematic plan view of FIG.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a schematic side view showing a state in which a cast iron pipe is drawn out from the mold by a drawing carriage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Metal mold | die 2 Cast iron pipe 3 Pulling trolley 4 Pulling device 5 Pulling arm 6 Chucking claw 7 Cylinder 8 Rail 9 Carriage moving path 10 Laying board 11 1st scraping board 12 Pin 13 Bracket 14 Cylinder 15 Core sand accommodating groove 16 Scraper 17 rodless cylinder 18 bracket 19 chute 20 container 21 wheel 22 core

Claims (3)

A core sand treatment device for scraping core sand that has fallen onto a drawing carriage moving passage from the mold when a cast iron pipe centrifugally cast by a rotating mold is drawn from the mold by a drawing carriage. A first scraping plate provided in a width direction at a lower portion of the extraction carriage for contacting and scraping the core sand on the extraction carriage movement path, and a rear end portion below the extraction carriage movement path. A core sand receiving groove for storing core sand scraped off by the first scraping plate, and a core from the core sand receiving groove provided to be movable in the core sand receiving groove are provided. A core in a centrifugal casting machine, comprising: a second scraper for scraping sand; and a drive mechanism for moving the second scraper in the length direction of the core sand receiving groove. Sand processing equipment. 2. The core sand in the centrifugal casting machine according to claim 1, wherein the first scraper plate is pivotally supported at an upper end thereof by a pulling carriage and is vertically rotatable by a cylinder. Processing equipment. The centrifugal sand container according to claim 1 or 2, wherein a container for containing core sand scraped from the core sand containing groove is disposed at an open end of the core sand containing groove. Core sand processing equipment in a casting machine.

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