JP4090224B2 - Cast trough structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a cast trough.
[0002]
[Prior art]
Centrifugal casting is known as a method for producing cast iron pipes and ductile cast iron pipes.
This centrifugal casting method is a method in which a trough is inserted into a rotating metal frame, and the molten metal poured from the trough is spread in the axial direction of the metal frame by centrifugal force to form a tube.
[0003]
By the way, in this manufacturing method, when the molten metal is completely supplied into the metal frame, the trough is pulled out of the metal frame, and the oxide (hereinafter referred to as “jam”) remaining on the trough is discarded by reversing the trough. Later, the coating material is applied to the inner surface of the trough in preparation for the next molten metal supply, but this cleaning and coating operation must be performed with the entire trough pulled completely out of the metal frame. The metal frame must be in a stopped state, and these processes require a certain amount of time, so there is a limit to increasing the number of castings per unit time due to the stop time during this period. was there.
[0004]
Also, when it is necessary to replace the metal frame, the trough located on the same axis as the metal frame is in the way, so additional work such as removing the trough is necessary, and it is very time consuming to replace the metal frame. There was a problem.
[0005]
[Problems to be solved by the invention]
This invention eliminates the above-mentioned problems, shortens the molten metal supply cycle compared to the prior art, increases the productivity when manufacturing tubes by centrifugal force molding, and makes it possible to easily replace the metal frame. It was made as an issue.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the structure of the cast trough according to claim 1 is such that troughs that supply molten metal from a ladle into the cast metal frame have the same number as the metal frame on both sides of the metal frame, and are parallel to the metal frame. Any one of the trough provided on one side of the metal frame and the trough provided on the other side of the metal frame, when the metal frame is retracted in the longitudinal direction from the trough full length, Both the trough provided on one side of the metal frame and the trough provided on the other side of the metal frame are retracted laterally from the axis of the metal frame. The trough provided on one side of the metal frame and the trough provided on the other side of the metal frame can be translated in the width direction of the trough independently of each other in a separated state. It will be.
[0007]
Therefore, if the metal frame is retracted in the axial direction with respect to the trough and the trough comes out of the metal frame, the trough is moved in parallel to the side of the metal frame and at the same time on the side of the metal frame until then. Since the trough that was in the waiting state is translated in the direction of the metal frame and the metal frame is advanced so that a new trough is inserted into the metal frame, the next casting is immediately started without waiting for the trough cleaning time. The trough that has been used up to now can be cleaned by reversing the jam and applying the coating material until the next use after retreating to the side. Productivity is improved because troughs can be processed without difficulty while shortening the manufacturing cycle.
[0008]
Further, since the trough can be retracted to both sides of the metal frame, the metal frame can be easily replaced by retracting in this way.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is a side view of a cast trough structure according to an embodiment of the present invention, and FIG. 2 is an explanatory plan view of the cast trough.
[0010]
In FIG. 1, reference numeral 1 denotes a carriage, and a pipe casting device 5 in which a metal frame 2, a cooling device 3 for the metal frame and the like are housed in a casing 4 is mounted.
The metal frame 2 is configured so that the molten metal is supplied from the triangular ladle 6 through the trough 7, and the carriage 1 is mounted on the rail 1 a so that the metal frame 2 moves in the arrow X direction along the trough 7. It is supposed to run on top.
[0011]
Reference numeral 8 denotes a ladle that supplies molten metal to the triangular ladle 6. Reference numeral 9 denotes a core, which is set on the receiving molding side of the metal frame 2 every time it is molded, and is fixed to the receiving molding end side of the metal frame 2 by the arms 10 and 10 during the centrifugal force molding. Has been.
As shown in FIG. 2, troughs 7 for supplying molten metal into the metal frame 2 are arranged in parallel on both sides of the metal frame 2 as many as the number of the metal frames 2. X) is supported on trolleys 11 and 11 that are movable in a direction orthogonal to X (arrow Y).
[0012]
The carriage 11 can be driven by the air cylinder piston devices 12 and 12 provided on the substrate 1b, and the carriages 11 and 11 are moved by the pistons 12a and 12a protruding and retracting from the cylinder.
[0013]
Next, the operation of the cast trough structure according to the above embodiment will be described.
First, as shown by the phantom line in FIG. 2, the carriage 1 is moved to a position retracted from the tip of the trough 7, and then the carriage 11 supporting the trough 7 is moved in the width direction as shown in FIG. The trough 7 is moved to a position on the same axis of the metal frame 2.
[0014]
Further, the core 9 is set on the receiving end molding end side of the metal frame 2 and fixed by the arm 10.
Next, the carriage 1 is moved forward.
By this advance, the trough 7 is inserted into the metal frame 2 as shown in FIG. And when the front-end | tip of the trough 7 reaches the innermost part of the metal frame 2, the metal frame 2 is rotated at high speed, and then the triangular ladle 6 is tilted to supply molten metal.
[0015]
Molten metal is supplied through the trough 7 from the rear end side of the metal frame 2 rotating at high speed, and at the same time, the carriage 1 retreats in the direction of the arrow as shown in FIG.
Then, when the supply of the molten metal is finished, the rotation of the metal frame 2 is maintained for a while until the molten metal condenses in the metal frame 2, and the cart 1 is shown in FIG. Retract to the position so that the trough 7 comes out of the metal frame 2 completely.
[0016]
Next, the carriage 11 is driven by the cylinder device 12, and the trough 7 that has been waiting on the side of the metal frame 2 until now is moved in parallel to the position of the metal frame 2 as shown in FIG. The supplied trough 7 is retracted to the side position of the metal frame 2.
[0017]
Then, the trough 7 that has been retracted and retracted is subjected to the disposal of jam and the coating material application work at that position, and at the same time, as shown in FIG. Then, a new trough 7 is inserted into the metal frame 2, and thereafter, as shown in FIG. 8, the molten metal is passed through the trough 7 from the receiving end of the metal frame 2 rotating at a high speed as described above. Then, the carriage 1 is moved backward in the direction of the arrow in accordance with the supply amount of the molten metal.
[0018]
When the supply of the molten metal is completed, as described above, the rotation of the metal frame 2 is maintained for a while until the molten metal condenses in the metal frame 2, and then the carriage 1 is retracted to the position shown in FIG. 7 is completely extracted from the metal frame 2, and the steps necessary for extracting the tube are performed as described above, and at the same time, the trough 7 that has been waiting on the side of the metal frame 2 is moved to the position of the metal frame 2 until now. In the state shown in FIG. 3, centrifugal casting is continuously performed.
[0019]
Therefore, after the casting trough 7 is pulled out from the metal frame 2, jamming can be discarded and coated during the next casting and before it is inserted into the metal frame 2. Since the casting with the metal frame 2 can be continuously performed without resting the casting apparatus 5, a high-quality cast iron pipe can be mass-produced in a short time.
[0020]
At this time, since the two carriages 11 and 11 move independently of each other in a separated state, the retreat time at the side of each trough can be arbitrarily adjusted, and the maintenance time for trough repair etc. Can take longer.
[0021]
Furthermore, when it is necessary to replace the metal frame 2, if each trough 7 is moved to the position shown in FIG. 2, the metal frame 2 can be exchanged at a free position without being obstructed by the trough 7. It becomes.
[0022]
【The invention's effect】
As described above, according to the cast trough structure of the present invention, when the cast iron pipe is centrifugally cast by the reciprocating motion of the carriage provided with the metal frame, the troughs waiting on both sides of the carriage are alternately arranged. Since it only has to be inserted into the metal frame, it is not necessary to pause the movement of the metal frame or the carriage for the work such as cleaning the trough or applying the coating material, and efficient casting becomes possible.
[0023]
Also, if all troughs are retracted to both sides of the metal frame, the metal frame can be exchanged at a free position without being obstructed by the trough, so that there is also an effect that the metal frame replacement operation becomes very easy. .
[Brief description of the drawings]
FIG. 1 is a side view showing a structure of a cast trough according to an embodiment.
FIG. 2 is a plan view showing the structure of a cast trough according to the embodiment.
FIG. 3 is a plan view for explaining the operation of a casting trough.
FIG. 4 is a plan view for explaining the operation of a casting trough.
FIG. 5 is a plan view for explaining the operation of the casting trough.
FIG. 6 is a plan view for explaining the operation of the casting trough.
FIG. 7 is a plan view for explaining the operation of the casting trough.
FIG. 8 is a plan view for explaining the operation of the casting trough.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casting machine truck 2 Gold frame 5 Casting machine 7 Trough 8 Core 11 Trough mounting truck

Claims (1)

Troughs for supplying molten metal from the ladle into the cast metal frame are arranged on both sides of the metal frame in the same number as the metal frame, in parallel with the metal frame, and provided on one side of the metal frame. Any one of the troughs provided on the other side of the metal frame can be positioned on the same axis as the metal frame when the metal frame retracts in the longitudinal direction from the trough full length, and on one side of the metal frame. A trough provided on one side of the metal frame so that both the trough provided and the trough provided on the other side of the metal frame can be retracted laterally from the axis of the metal frame; A cast-in trough structure in which a trough provided on the other side of the metal frame can be translated in the width direction of the trough independently of each other in a separated state .

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