JPS591136B2 - Pouring method and equipment in continuous molding line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pouring method and apparatus for a continuous molding line.

BACKGROUND ART Conventionally, a method using a continuous molding line has been known as one method for continuously producing large quantities of cast products.

In general, this continuous molding line has a large number of molds arranged in series and transferred one after another, and a predetermined graphite spheroidized molten metal is sequentially applied to each of the molds automatically or manually from a ladle or the like. After pouring the molten metal, the molten metal is allowed to cool and solidify, and the desired castings are sequentially removed from each mold.

By the way, in a conventional continuous molding line, a large amount of molten metal that has been subjected to graphite spheroidization treatment is held in a pouring device called a ladle, and is sequentially transferred from the pouring device to the molds one by one. Since the molten metal is divided into two parts, it is unavoidable that the molten metal is poured at different times for each mold, and therefore the amount of molten metal poured into each mold (casting weight) This means that there are variations in the results.

For this reason, in the past, great attention has been paid to this pouring operation, and efforts have been made to improve the pouring method and to significantly reduce the defective rate.

However, in such conventional methods, no matter how strictly the pouring method is controlled, it is inevitable that hot water spills on the mold surface or outside the mold, resulting in molten metal loss.

In addition, due to such molten metal loss and the approximate amount of molten metal in the pouring device, there is a problem that there is a shortage of molten metal to be poured, or there is surplus of molten metal, and especially when there is insufficient molten metal, the product If this is not possible and there is surplus hot water, the hot water must be discarded as residual hot water or returned to the original furnace, but this is difficult in terms of the amount of spheroidizing agent used, heating energy, consumption of raw materials, etc. This also results in a large amount of waste, which is not only undesirable from the viewpoint of energy saving, but also increases the cost of cast products.

The present invention has been made against this background, and its gist is to form a predetermined graphite spheroid in a plurality of reaction vessels that are periodically circulated by a rotating body or the like. The graphite spheroidizing agent is set in sequence, and then only the required amount of molten metal is sequentially supplied by pouring it into one of the molds to the reaction vessel in which the graphite spheroidizing agent is set, and by supplying the molten metal, the inside of the reaction vessel is The entire amount of the treated molten metal obtained by proceeding with the graphite spheroidization reaction is poured from the reaction vessel into one of the molds that are sequentially transferred in a continuous mold line,
This eliminated hot water spills, leftover hot water, and insufficient hot water, resulting in a significant reduction in the rate of defective products and improvements in raw material and energy losses.

That is, according to the present invention, only the amount of molten metal necessary for one of the molds is subjected to graphite spheroidization treatment in the reaction vessel,
Then, all you have to do is pour the entire amount into the specified mold, so there is no problem of hot water shortage or excess hot water, and there is no need to control the amount of hot water poured from the reaction vessel, so there is almost no chance of hot water spilling. Furthermore, variations in the amount of molten metal poured into the mold are completely eliminated, thereby eliminating large wastes such as molten metal loss, spheroidizing agent loss, and energy loss.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 shows an example of an apparatus suitable for carrying out the present invention, in which a large number of molds 1 are arranged in a line and are sequentially transferred in the direction of arrow X by a known suitable conveyance mechanism such as a conveyor. It is now possible to

The pouring mechanism for the mold 1 to be transferred includes a rotating device 2 located at the center and rotating in the direction of arrow Y, and an arm 3 having a phase difference of about 90° with respect to the rotating device 2. It has four reaction container holders 4 attached through the reaction container holder 4, and a tilting device 8 provided on each reaction container holder 4 allows the reaction containers 5 accommodated therein to be tilted respectively. It looks like this.

In this pouring mechanism, the position where the reaction vessel holder 4 supported by the rotating device 2 rotated in the Y direction is close to the mold 1 transfer line is such that the treated molten metal in the reaction vessel 5 is transferred to the mold 1. There is also a setting part for setting a predetermined graphite spheroidizing agent into the reaction vessel 5 at a position rotated approximately 90 degrees from the pouring part. A is provided.

Further, at a position rotated by about 90 degrees from the set part A, in other words, at a position symmetrical to the pouring part, molten metal (hot metal) to be subjected to graphite spheroidization treatment was accommodated in the reaction vessel holder 4. A molten metal supply section B that supplies the inside of the reaction vessel 5 is provided.

In this molten metal supply section B, a molten metal (hot metal) holding furnace 6 is arranged to hold a large amount of molten metal so as to be located outside of the 40 rotations of the reaction vessel holder, and is rotated to the molten metal supply section B. The molten metal required for pouring into one mold 10 is sequentially supplied from the holding furnace 6 to the reaction vessel 5 .

Note that the accurate supply of the molten metal to the reaction vessel 5 is
As shown in the figure, this is carried out by measuring with a suitable measuring device 7 such as a load cell disposed in the molten metal supply section B, and also by means such as controlling the amount of tapped (supplied) metal.

The molten metal supplied from the molten metal supply section B immediately starts reacting with the graphite spheroidizing agent set therein in the reaction vessel 5, and passes through the middle position C by rotation to the pouring section. After the graphite spheroidization reaction is completed during the process, the reaction vessel 5 is tilted by the tilting device 8 in the pouring section, so that a predetermined mold 1 is formed.
The molten metal is poured into the molten metal from the pouring port 1a.

Therefore, in such a configuration, if the rotating device 2 is rotated in conjunction with the movement of the mold 1, and the reaction vessel holder 4 is thereby rotated, each reaction vessel 5 can be moved to the graphite provided at a predetermined rotational position. Spheroidizing agent setting part A, molten metal supply part B,
The spheroidized molten graphite for one mold is formed in the reaction vessel 5 during the movement from the reaction progressing section C1 to the pouring section. Then, the entire amount is poured into one of the molds 1, and this is repeated for each reaction vessel 5, so that the molds 1 that are moved through the transfer line are successively poured. be.

Here, since each reaction vessel 5 is rotated with a phase difference of about 90°, the reaction vessel 5 containing the spheroidized molten metal is moved to the pouring section every time the rotating device 2 rotates 90°. Therefore, the transfer pitch of one mold 1 in the transfer line can be adjusted to 90° of the rotating device 2.
Molten metal is poured into each mold 1 being transferred by matching the rotation pitch.

As described above, according to the present invention, the spheroidized molten metal for only one mold is formed in each reaction vessel 5, and the entire amount is poured into the mold 1. There is no problem with the amount of hot water poured into the mold, and not only is the pouring operation extremely easy, but also the spillage of hot water can be effectively suppressed, and there is no need to worry about excessive or insufficient hot water. Since there is no problem of leftover hot water or excess or deficiency of hot water, this eliminates all the large wastes (losses) that occur in the past, thereby reducing the cost of cast products and achieving energy savings. It was possible.

It should be noted that the present invention is not to be construed as being limited only to the specific examples exemplified above (and various modifications and changes may be made based on the knowledge of those skilled in the art without departing from the spirit of the present invention). It can be implemented in

For example, on the upper side, each reaction container 5 is housed in a holder 4 attached to a rotating device 2 via an arm 3 and is rotated. It is also possible to rotate and move the reaction containers by housing them in storage sections provided with a predetermined phase difference between the two, and in the case of the upper four reaction containers, the reaction containers can be moved in a circular manner periodically. However, an appropriate number (plurality) of them may be provided in consideration of mold transfer conditions, spheroidizing agent setting conditions, molten metal supply conditions, molten metal pouring conditions, and further rotation conditions of the rotating body.

Furthermore, if the reaction vessel is to be circulated periodically, it is also possible to employ an appropriate moving mechanism other than a rotating body around the -axis.

In addition, setting the graphite spheroidizing agent in the reaction container in the setting part A, supplying a certain amount of molten metal in the molten metal supply part B,
Furthermore, pouring of the processed molten metal from the reaction vessel to the mold in the pouring section can be performed manually or mechanically, and it can also be performed automatically using a control device or the like. It is also possible to do so.

In particular, with the present invention, there is no need to adjust the amount of molten metal poured into the mold, and it is only necessary to pour all of the molten metal in the reaction vessel, making it easier to achieve such automation. be.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of an apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view showing an example of a molten metal supply section. 1: Mold, 2: Rotating device, 3: Arm, 4: Reaction container holder, 5: Reaction container, 6: Molten metal holding furnace.

Claims (1)

[Claims] 1. A method in which a large number of molds are arranged and sequentially transferred, and a predetermined molten metal that has been subjected to a graphite nodularization treatment is sequentially poured into each of the molds to continuously form a predetermined casting. The method of pouring in a continuous molding line includes a setting step of sequentially setting a prescribed graphite spheroidizing agent in a plurality of reaction vessels that are periodically circulated, and a step of setting the graphite spheroidizing agent in sequence. A molten metal supply step in which only the amount of molten metal necessary for pouring into one of the molds is sequentially supplied to a reaction vessel, and the entire amount of molten metal subjected to graphite spheroidization treatment in the reaction vessel is transferred from the reaction vessel. A method for pouring metal in a continuous molding line, characterized in that it includes a pouring step of sequentially pouring metal into one of the transferred molds. 2. A continuous molding line in which a large number of molds are arranged and transferred one after another, and a predetermined molten metal treated with graphite spheroidization is sequentially poured into each of the molds to continuously form a predetermined casting. In this pouring device, a plurality of reaction vessels are arranged with a predetermined phase difference with respect to a rotary body rotated by a uniaxial shaft, and a predetermined graphite is placed in relation to the reaction vessels rotated by the rotary body. a setting part for setting a spheroidizing agent; a molten metal supply part for supplying only the amount of molten metal necessary for pouring into one of the molds into the reaction vessel in which the graphite spheroidizing agent is set; and a pouring section for pouring the entire amount of molten metal treated from the reaction vessel into one of the molds to be transferred, the continuous molding being characterized in that a pouring section is provided at a predetermined rotational position of the rotating body, respectively. Pouring equipment in the line.