JPH0235400Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an inoculant injection device that is supplied to improve the material quality of molten metal, and is used to easily and reliably supply inoculant during casting. used for.

(Prior art) As shown in Fig. 2, as a method of introducing an inoculant into the molten metal poured into a mold, a vibrating conveyor 21 is used to send the inoculant 25 forward little by little by vibration, and the inoculant is poured into the mold. There is a method of supplying the inoculant 25 to the molten metal 24 falling from the ladle 22 into the mold 23 (for example, see Japanese Utility Model Application Publication No. 59-85664).

(Problems to be solved by the invention) The feeding capacity is constant when the vibration conveyor 21 is used for feeding, and the feeding force cannot be changed depending on the type, shape, or size of the inoculant 25.
Moreover, since the inoculant 25 does not easily cause slippage, it is difficult to control the amount added, resulting in variations. Furthermore, since the amount of the inoculant 25 to be introduced is arbitrarily set within the range of 0.06 to 0.7 wt% with respect to the weight of the molten metal supplied to the ladle 22, the amount of the inoculant 25 to be introduced is different. or when the weight of the molten metal supplied to the ladle 22 increases or decreases, the amount of inoculant 25 to be added increases or decreases accordingly, and must be controlled. However, since the feeding capacity of the vibrating conveyor 21 is constant, the inoculant 2 on the vibrating conveyor 21
As the amount of 5 increases, the feed speed becomes slower,
This does not match the molten metal supply speed, resulting in a charging error.
Furthermore, when the capacity of the vibrating conveyor 21 is set high, when adding a small amount of the inoculant 25, the feeding speed is high, and there is a problem that it is difficult to control the amount of inoculant added at once. .

Therefore, the problems that this invention attempts to solve are:
The objective is to accurately and reliably inject a predetermined amount of inoculant into the mold.

(Means for solving the problem) The present invention provides an orifice at the inoculant outflow opening, connects an air supply pipe to the chute, and
This inoculant feeding device is equipped with an inoculum falling amount detection device and a detection device below the chute that detects inoculant dropping.

(effect) The above means works as follows.

When pressurized air is supplied to the chute through the air supply pipe, the pressurized air fills the chute so that the inoculant does not fall from the outflow opening, and the supply of the inoculant is stopped. When the supply of pressurized air is stopped, the inoculant falls from the outflow opening into the chute, the inoculum falling amount detection device detects the start of inoculum falling and the falling amount, and then the inoculant drop detection device detects the inoculant dropping. Detect inoculum injection.

(Example) An embodiment of the present invention will be described below.

Fig. 1 shows an inoculant feeding device according to the present invention, and 1 has an inoculant 2 outflow opening 3 at the bottom, and an inverted V-shape inside to prevent the inoculant 2 from clumping (hanging on a shelf). It is a hopper in which a type umbrella 4 is arranged, and the inoculant outflow opening 3 of the hopper 1 has a rod-shaped member 5 that can be freely inserted.
The rod-shaped member 5 is connected to the chute 6 through the
As a result, an orifice is formed in the opening 3. An air supply pipe 7 is connected to one side of the chute 6, and a falling amount detection device 8 for detecting the start of falling and the amount of falling of the inoculant 2 is interposed on the other side of the chute 6. Furthermore, an optical detection device 9 for detecting dropping of inoculant is disposed below the falling amount detection device 8, and a light projecting device (not shown) of the detection device 9 is provided.
is shaped so as to project a band-shaped beam of light that intersects with the inoculant to be dropped toward a light receiving device (not shown),
A light receiving device (not shown) receives the light beam that has passed through the inoculant to be dropped, and detects the amount of light received as an electrical signal or the like.

Next, the effect will be explained. When pressurized air is supplied to the chute 6 through the air supply pipe 7, the chute 6 is filled with pressurized air, and the inoculant 2 stops falling. Next, when it is detected by a signal from a limit switch (not shown) that the mold 10 is placed at a predetermined position below the chute 6,
In response to this signal, the supply of pressurized air to the chute 6 is stopped, the inoculant 2 in the hopper 1 falls into the chute 6, and the falling amount of the inoculant 2 is detected by the falling amount detection device 8. Detected. The inoculant 2 that has passed through the falling amount detection device 8 is guided from the chute 6 to the mold 10 via the detection device 9, and is dropped into the sprue bottom 11 of the mold 10. After a predetermined period of time has elapsed, pressurized air is supplied to the chute 6 through the air supply pipe 7, and the inoculant 2 stops falling. The falling amount of the inoculant 2 onto the mold 10 is measured by the falling amount detection device 8, and it is checked whether the falling amount is within a normal range, and if it falls outside the range, it is determined that there is an abnormal situation. Is displayed. Furthermore, even if the falling amount is normal, if the inoculant 2 becomes clogged in the chute 6 or does not fall smoothly, the dropping will not be carried out normally. Since the agent 2 does not pass through the detection device 9, the detection device 9 detects this and indicates that there is an abnormal situation. Thus, by the combination of the falling amount detection device 8 and the detection device 9,
It is possible to check whether the inoculum 2 was finally dispensed in a normal amount. If any abnormality is found in any of the above measurements, the movement of the mold 10 is stopped.

(Effects of the invention) According to the invention, an orifice is provided at the inoculum outflow opening, an air supply pipe is connected to the chute, and an inoculum falling amount detection device is interposed, and the inoculum is further disposed below the chute. Since a detection device for detecting dropping is provided, it is possible to easily confirm whether or not the inoculant has been added normally, and it is possible to check for defects in the product in advance. In addition, the amount of inoculant introduced into the mold can be easily increased or decreased by adjusting the pressurized air, and the amount of inoculant introduced into the mold can be precisely controlled by accurately controlling the start and stop of adding the inoculant to the mold. This makes it possible to improve the effect of inoculant injection.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an inoculant charging device according to the present invention, and FIG. 2 is a schematic diagram showing a conventional inoculant charging device. 2... Inoculant, 3... Outflow opening, 5... Rod-shaped member, 6... Chute, 7... Air supply pipe, 8...
...Fall amount detection device, 9...Detection device.

Claims (1)

[Scope of utility model registration request] In an inoculum feeding device in which a chute is connected to an inoculant outflow opening formed at the bottom of the hopper, an orifice is provided at the inoculum outflow opening, an air supply pipe is connected to the chute, and the falling amount of inoculant is detected. 1. An inoculum injection device, characterized in that the device is interposed therein, and further a detection device for detecting inoculum dropping is provided below the chute.