JPH0315251Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a rotary casting machine that continuously casts anodes for electrolytic refining of copper smelting, etc. In particular, in order to peel off solidified anodes, the lower surface of the anodes is removed. This invention relates to a device for adjusting the return position of an elevating pin that is pushed up and separated from a mold.

(Prior art and its problems) In copper smelting, etc., when casting anodes for electrolytic refining, many molds are placed on a turntable.
Pour the metal into the mold at a fixed position while rotating it,
A horizontal rotary casting machine is used in which the casting is removed at another fixed position. In this rotary casting machine, in order to remove the anode from the mold, the lower surface of the anode is pushed up using a raised pin that moves up and down through the through-hole of the mold, thereby separating the shoulder side of the anode from the mold. The shoulder part is hooked on the hook and removed. After the anode has been removed, the projecting pin is designed to be repeatedly poured, so that its upper surface descends to its original level, flush with the surface of the mold. However, it often happens that the molten metal enters the gap between the projecting pin and the through hole of the mold and becomes stuck, or that the mold release agent applied to the inner surface of the mold or the casting burr gets caught and does not return to the original level. Conventionally, a worker visually checked the return status of the uplift pin and then used a sledgehammer to hit the top of the upshot pin to return it to its normal level.

However, this work not only takes a lot of man-hours, but also
The work was hard work under high temperatures, and there were health and safety issues for the workers. Therefore, as in Jikko No. 46-19781,
A hammer pin driving device was developed in which a hammer holding frame was fixed to the outside of the turntable, and a hammer holding guide was attached to the frame so as to move in the rotating direction of the mold. All the upper pins are automatically hammered in sequentially. In addition, as a means of detecting whether or not the raised pin driven in by this device is at a normal level, as in Utility Model Publication No. 55-32701, a pin is formed so that the lower side is flush with the mold surface and is in contact with the mold surface. A mounting member having a through hole larger than the outer diameter of the upper surface of the projecting pin, a fixing plate supported by a plurality of pillars provided upright on the upper surface of the mounting member, and a hole through which the pillars pass. The pin level detection plate is held slidably up and down by the pin level detection plate and has a detection protrusion on its lower surface that can enter and exit the through hole of the mounting member and has a protruding length larger than the thickness of the mounting member. , a transmission radius which is connected to the pin level detection plate and has an indicator at its upper end and which changes the vertical displacement of the pin level detection plate into an enlarged displacement of the indicator; Consisting of a limit switch installed opposite to the needle, when the tip of the detection protrusion is displaced above or below a certain limit from the plane formed by the lower side of the mounting member, the corresponding displacement of the indicator needle of the transmission arm occurs. A device for detecting an abnormality in a raised pin of a rotary casting machine, which is configured to operate a limit switch, has been devised and put into practical use. However, in the past, the above-mentioned hammering device and abnormality detection device operated independently without any connection, and the hammer was used to hit the top of the top of the pin until it had returned to its normal level. , there was a problem that the life of the mold was extremely short.

(Means for Solving the Problems) In order to solve the above-mentioned problems, this invention, after stripping the castings of a continuous rotary casting machine, changes the return position of the raised pin of the mold after successive stripping. If a detection mechanism detects a mold that has not fully returned, the pin-beating mechanism in the next step hits the top of the raised pin to return that mold to its normal position.

(Example) An example will be described below with reference to the drawings.
FIG. 1 is a conceptual diagram of the layout of a rotary casting machine equipped with the device of the present invention, and FIG. 2 is a flow diagram of the interlocking operation of the return position detection mechanism and the pin driving mechanism. A rotary casting machine 1 includes a turntable 1a on which a number of molds are placed on a horizontal upper surface and rotates around a central axis, a pouring device 2 that pours molten metal into the molds from above, and a blower blowing air forward in the direction of rotation shown by arrow A. Alternatively, there is a cooling device 3 that cools the casting metal by spraying water or the like, and further in front of the cooling device 3, a stripping device that pushes up a projecting pin from below the bottom of the mold to separate the casting from the mold, and suspends and pulls out a part of it. 4, in front of which is a pin return position detection mechanism 5 that lowers a sensor from above the mold to detect the return position of the raised pin after stripping the casting, and drops a hammer onto the top of the pin from above the mold. It consists of a pin driving mechanism 6 and a control mechanism 7 that controls both, each of which is disposed at a predetermined position.

Conventionally used devices can be used as the pouring device 2 or the pin driving mechanism 6.

(Function) Next, the operation of this device will be explained. Molten metal is poured into a mold on a turntable 1a by a pouring device 2, and the casting, which is cooled and solidified by a cooling device 3, is pushed up from the bottom by a projecting pin, separated from the mold, and peeled off. Then, the raised pin returns to its original position and its top becomes level with the bottom of the mold.

On the other hand, in the return position detection mechanism of the uplift pin, a limit switch is activated when the mold approaches, and a position timer 12 is activated by the table operation signal 11 as shown in FIG.
starts. Then, as the detector 13 descends after a predetermined period of time, a descending timer starts and the detector 13 descends.
The end of the sensor detects whether the top of the protruding pin on the bottom of the moving mold is at the same level. If there is no abnormality, the detector 13 rises and stops after a predetermined period of time. If the uplift pin has not returned to its normal position, the limit switch 4 is activated and the alarm and position timer 15 of the pin driving mechanism 6 are started, and after a predetermined period of time, alarms such as lamps and buzzers are stopped and the hammer 16 is activated. The moving mold falls onto the top of the incompletely returned pin and is hammered into place.

At the same time, the falling tire is started, and after a predetermined time, the driving hammer is pulled up, and when the limit switch 17 is activated, it is stopped. When the alarm is activated, the worker visually checks the position of the uplift pin after striking it in. If the abnormality has not been resolved, take necessary measures such as reworking or replacing it, and if it has returned to the specified position, continue casting. Continued work. In this way, it is possible to pour metal into the same mold many times and automatically perform smooth continuous casting.

(Effect of the invention) As explained above, this invention uses a continuous rotary casting machine to sequentially detect the return position of the raised pin of the mold after stripping the casting, and returns it to the predetermined position in conjunction with the pin driving mechanism. Since only the overhanging pins that have not been removed are hammered in, damage to the overhanging pins and molds is reduced.
As a result, the life of the mold can be extended by 20 to 30%, and since the frequency of operation of the hammering mechanism is significantly reduced, its maintenance can be greatly reduced, and other remarkable practical effects can be obtained.

[Brief explanation of the drawing]

1 and 2 are a conceptual diagram of the layout of a rotary casting machine equipped with the device of the present invention and a flowchart of the interlocking operation of the return position detection mechanism and the uplift pin driving mechanism, respectively. 1: Rotary casting machine, 1a: Turntable, 2:
pouring device, 3: cooling device, 4: stripping device, 5: pin return position detection mechanism, 6: pin driving mechanism,
7: Control mechanism.

Claims (1)

[Scope of utility model registration request] In a rotary casting machine, molten metal is sequentially injected into a mold placed on a horizontal turntable, and then the bottom of the solidified casting is pushed up with a projecting pin to peel it from the mold. A rotary casting machine comprising a mechanism for detecting the return position of the upper pin, and a mechanism for returning the upper pin by hitting the top of the upper pin when the detection mechanism detects an abnormal upper pin. Adjustment device for uplift pin.