JP2006198670A - Supplying apparatus for molten metal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supplying apparatus for molten metal having a new constitution by which a fixed quantity of molten metal can surely be supplied in a simple constitution and also, various costs can be reduced. <P>SOLUTION: The supplying apparatus is provided with a holding furnace 3 for holding the molten metal m and a pressurizing chamber 2 for supplying a prescribed quantity of molten metal in the molten metal held in the holding furnace 3 into a casting machine. The pressurizing chamber 2 is integrally connected with a fixed molten metal surface chamber 5 for storing the molten metal m and a pressurizing space 6 pressurized for tapping the molten metal m stored in the fixed molten metal surface chamber 5 to every prescribed quantity into the casting machine. Then, a molten metal tapping quantity adjusting body 7 for increasing/decreasing the molten metal tapping quantity into the casting machine by charging it into the pressurizing space 6 and changing the volume in the inner part of the pressurizing space 6, is arranged in the pressurizing space 6 so as to be taken out and exchanged. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hot water supply apparatus for supplying molten metal to a casting machine, and more particularly to a hot water supply apparatus applied to a low speed high pressure casting machine.

As prior art document information related to the present invention, for example, there is information disclosed in Patent Document 1.
A hot water supply apparatus disclosed in Patent Document 1 includes a constant hot water furnace, a hot water pot installed inside thereof, a hot water pipe connected in communication with the hot water pot, a supply pipe for air or an inert gas, The open / close valve opens and closes the molten metal inlet, and pressurizes the inside of the hot water pot to supply the molten metal in the hot water pot from the hot water pipe to the casting machine for a predetermined fixed amount every casting cycle.
Japanese Patent Laid-Open No. 2003-136216 (see [0007] and [FIG. 1])

By the way, the amount of hot water for supplying a predetermined amount of molten metal to a casting machine for each casting cycle differs depending on the product to be cast. The hot water pot itself is replaced when the molten metal holding capacity of the hot water pot deviates from the range corresponding to the casting amount of the product to be cast. There is a need. That is, as a hot water supply pot, for example, a hot water pot that can discharge 1 kg to 4.5 kg of molten metal and a hot water pot that can discharge 4 kg to 10 kg of molten metal are prepared, and a suitable hot water pot is selected according to the product to be cast. Need to be used.
However, the above-described conventional hot water supply apparatus has many components as described above, and is configured using an extremely expensive and fragile ceramic material in order to maintain the airtightness of the hot water pot. Significant costs are required for the production and maintenance of hot water pots.
In addition, when the hot water pot is replaced and installed in order to meet the target casting weight, a complicated mounting work is required so as not to impair the airtightness of the hot water pipe.

  The present invention has been made in view of such conventional problems, and enables reliable fixed-quantity hot water supply with a simple configuration and reduces various costs without requiring complicated work. It is an object of the present invention to provide a hot water supply apparatus for a molten metal having a possible new configuration.

The present invention employs the following technical means to achieve the above object.
The technical means includes a holding furnace for holding the molten metal, and a pressurizing chamber for supplying a predetermined amount of the molten metal held in the holding furnace to the casting machine. A constant hot water surface chamber to be stored, and a pressurizing space pressurized to deliver a predetermined amount of molten metal stored in the constant hot water surface chamber to the casting machine are integrally connected, It is characterized in that it is provided so as to be able to take out and replace a tapping amount adjusting body for increasing or decreasing the tapping amount to the casting machine by changing the volume inside the pressurizing space by inserting into the pressurizing space ( Claim 1).

At this time, as a specific configuration of the tapping amount adjusting body, it is preferable that it is also used as a lid for sealing the pressurizing chamber (Claim 2).
Further, in the case where the tapping amount adjusting body is formed to be used also as a lid portion that seals the pressurizing chamber, the pressurizing chamber is sealed with the lid portion and simultaneously inserted into the pressurizing space. It is desirable to have a fitting adjustment part that varies the volume inside the pressure space.

  In addition, the fitting adjusting portion includes all configurations that can increase or decrease the volume of the pressurizing space, and preferably, the fitting adjusting portion is formed in a cylindrical shape having a hollow inside and is adapted to the inside of the pressurizing space. The hollow portion is configured to be a pressurizing space portion that is pressurized in order to deliver a predetermined amount of molten metal stored in the constant hot water surface chamber to the casting machine. Item 4), or a molten metal that is loosely fitted in the pressurizing space and is stored in the constant hot water surface chamber in the space between the outer periphery of the fitting adjusting portion and the inner surface of the pressurizing space. It is preferable that the pressurization space is pressurized in order to deliver a predetermined amount of hot water (Claim 5).

  Further, it is preferable that the volume of the pressurizing space is increased or decreased by the volume of the fitting adjusting portion.

According to the hot water supply apparatus for molten metal according to the present invention, the following excellent effects can be expected.
According to the hot water supply device for molten metal according to claim 1, it is possible to reliably supply hot water to a casting machine with a simple structure, and is expensive and fragile as in a conventional hot water supply device. Therefore, various costs can be reduced.
In addition, it does not require a complicated operation such as connecting a hot water supply pipe to a hot water pot with airtightness unlike a conventional hot water supply apparatus, so that not only can the cost be reduced, but also the airtightness of the pressurized chamber. Therefore, it is possible to further improve the reliability of supplying a predetermined amount of molten metal to the casting machine.

According to the hot water supply device for molten metal according to any one of claims 2 to 6, it is possible to provide the tapping amount adjusting body with a simple configuration and to arbitrarily adjust the fixed amount hot water supply with a simple configuration.
That is, when forming the molten metal stored in the pressurizing chamber so as to be supplied to the casting machine in a fixed amount, the pressurization responsiveness and output in the pressurizing chamber can be improved by increasing or decreasing the volume of the pressurizing space in the pressurizing chamber. It is possible to realize accurate and precise hot water supply by suppressing variations in the amount of hot water. Specifically, when it is desired to discharge a small amount of molten metal (for example, 1 Kg) to the casting machine, the displacement (amount) of the constant hot water surface relative to the inflow amount of the pressurizing gas flowing into the pressurizing space of the pressurizing chamber. Therefore, the responsiveness is poor and the amount of hot water supply tends to vary. Therefore, by reducing the volume of the pressurizing space of the pressurizing chamber, the inflow amount of the pressurizing gas flowing into the pressurizing space can be reduced, and as a result, the displacement of the constant hot water surface is relatively increased. It is possible to realize a precise and accurate hot water supply.

Hereinafter, a first embodiment in the best mode for carrying out a molten metal hot water supply apparatus (hereinafter abbreviated as “hot water supply apparatus”) according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected to the same structural member through all the drawings.

In the figure, reference numeral 1 denotes a hot water supply device, reference numeral 2 denotes a pressurizing chamber for supplying a predetermined amount of molten metal held in the holding furnace 3 to a casting machine (not shown), and the pressurizing chamber 2 and the holding furnace 3 are communicated with each other through a communication port 4 that is opened and closed by an on-off valve 41.
Accordingly, the pressurizing chamber 2 has a mechanism in which a fixed amount of the molten metal m supplied from the holding furnace 3 is held through the communication port 4, and the pressurizing chamber is closed with the communication port 4 closed by the on-off valve 41. By pressurizing the interior of 2, the molten metal m stored in the pressurizing chamber 2 is formed so as to be supplied to the casting machine through the discharge pipe A and the hot water supply pipe B to a fixed amount.
Incidentally, the holding furnace 3 has a known configuration in which a large amount of the molten metal m supplied to the pressurizing chamber 2 is stored.

  The pressurizing chamber 2 is integrally connected above the constant hot water surface chamber 5 and a constant hot water surface chamber 5 for storing a predetermined amount of molten metal m through the adjoining holding furnace 3 and the communication port 4. A pressurized space 6 that is pressurized in order to deliver a predetermined amount of molten metal m stored in the chamber 5 to the casting machine, and a volume inside the pressurized space 6 by being inserted into the pressurized space 6. And a tapping amount adjusting body 7 for increasing or decreasing the tapping amount to the casting machine.

  The constant hot water surface chamber 5 is a part for holding a certain amount of the molten metal m supplied from the holding furnace 3, and the pressurizing space 6 is a predetermined amount of the molten metal m held in the constant hot water surface chamber 5 in a casting machine. It is a part which applies the pressure for addressing supply, and the inner surfaces of the constant hot water surface chamber 5 and the pressurizing space 6 are configured using a well-known furnace material with high confidentiality.

Further, the tapping amount adjusting body 7 is for changing the volume inside the pressurizing space 6 to increase / decrease the tapping amount to the casting machine. The tapping amount adjusting body 7 is separate from the lid portion 71 that seals the pressurizing chamber 2. Although it may be formed, it is preferable to use a fireproof heat insulating material having airtightness and also used as the lid portion 71. Incidentally, in the embodiment shown in FIG. 1 and FIG. 2, the tapping amount adjusting body 7 is formed also as a lid portion 71 that seals the open portion 61 of the pressurizing space 6 in the pressurizing chamber 2.
Here, as the refractory heat insulating material for forming the tapping amount adjusting body 7, any material that is currently used in a furnace for casting can be used.

  The hot water adjustment body 7 will be described in detail. The one shown in FIG. 1 maximizes the volume of the pressurizing space 6 and seals the opening 61 of the pressurizing space 6 in the pressurizing chamber 2. 71. In this case, since the distance from the constant hot water surface 51 to the inner upper portion at the outlet A ′ of the discharge pipe A is the maximum displacement amount, this displacement amount (distance) and the area of the pressurizing space 6 The volume represented by the product (portion S indicated by the slanted line in the figure) is the maximum amount of hot water supplied to the casting machine.

  Moreover, the amount adjustment body 7 of the hot water shown in FIG. 2 makes the volume of the pressurization space 6 smaller than the volume of the pressurization space 6 shown in FIG. The lid portion 71 to be sealed, and the fitting adjustment portion 72 that seals the opening portion 61 of the pressurizing space 6 with the lid portion 71 and is inserted into the pressurizing space 6 and changes the volume inside the pressurizing space 6. Are formed into the same body.

  The fitting adjusting portion 72 is formed in a cylindrical shape having a hollow inside and fitted into the pressurizing space 6 so that the hollow portion is stored in the constant hot water surface chamber 2. It becomes the pressurization space part pressurized in order to send the molten metal m to the casting machine to a predetermined fixed quantity. That is, since the distance from the constant hot water surface 51 at the inner diameter of the fitting adjusting portion 72 formed inside the cavity to the inner upper portion at the outlet A ′ of the discharge pipe A is the maximum displacement amount, this displacement amount (distance). The volume expressed by the product of the pressure space 6 and the area of the pressurizing space 6 (the portion S indicated by diagonal lines in the figure) is the maximum amount of hot water supplied to the casting machine.

At this time, as for the tapping amount adjusting body 7 having the fitting adjusting portion 72, a plurality of types of fitting adjusting portions 72 having different volumes are prepared and appropriately replaced with ones corresponding to the target tapping capacity. The amount of hot water supplied to the casting machine is arbitrarily changed.
That is, when only a small amount of hot water is supplied to the casting machine, the inner diameter is made smaller and / or the depth is made deeper than the illustrated fitting adjustment portion 72 in order to reduce the volume of the pressurizing space 6. Using the tapping amount adjusting body provided with the fitting adjusting portion whose volume is reduced, and conversely, when the amount of tapping hot water supplied to the casting machine is large, the illustrated fitting is performed to increase the volume of the pressurizing space 6. The amount of hot water supplied to the casting machine can be arbitrarily changed by using a hot water amount adjusting body having a fitting adjusting portion whose volume is increased by making the inner diameter larger and / or shallower than the adjusting portion. be able to.

The tapping amount adjusting body 7 composed only of the lid portion 71 fits the lid portion 71 into a lid portion fitting recess 62 provided on the periphery of the opening portion 61 and fixes the presser plate 9 from above. Is attached to the pressure chamber 2.
Further, the hot water adjustment body 7 composed of the lid portion 71 and the fitting adjustment portion 72 fits the fitting adjustment portion 72 in the pressure space 6 and also fits the lid portion 71 to the lid portion. The pressure plate 2 is attached by fitting into the recess 62 and fixing the pressing plate 9 from above.

The pressure plate 9 prevents the hot water adjustment body 7 from coming out of the pressure chamber 2 by the pressure acting on the hot water supply adjustment body 7, and prevents the supplied air and inert gas from leaking. It is fixed by a known method such as (not shown).
Reference numeral 8 in the drawing is a gas supply pipe for supplying air or an inert gas to the pressure space 6 to apply pressure to the constant hot water surface 51 of the molten metal m stored in the constant hot water surface chamber 2. Reference numeral 91 denotes a packing for preventing leakage of air and inert gas.

Here, in addition to the illustrated embodiment, the tapping amount adjusting body 7 may be a structure in which the lid portion 71 and the fitting adjusting portion 72 are separated.
At that time, when the volume of the pressurizing space 6 is maximized, only the lid is used, and when the volume of the pressurizing space 6 is changed, the lid and the pressurizing space are set to the target volume. The fitting adjusting part having the inner diameter and / or depth is used in combination.
According to such a form of the tapping amount adjusting body, the use of only the lid body, the combined use of the lid body and the fitting adjusting portion, and the replacement to the fitting adjusting portion having the target volume can be arbitrarily controlled. It becomes possible to change to.

Next, the 2nd form of the hot water supply apparatus 1 which concerns on this invention is demonstrated based on FIG.3 and FIG.4 (a)-(c).
In addition, about the site | part which overlaps with the 1st form shown in FIG.1 and FIG.2, the description is abbreviate | omitted by attaching | subjecting the same code | symbol.

As shown in detail in FIG. 3, the hot water supply apparatus 1 of the second embodiment is mounted so that the fitting adjustment portion 72 in the tapping amount adjusting body 7 is loosely fitted inside the pressurizing space 6. The space portion between the outer periphery of 72 and the inner surface of the pressurizing space 6 forms a pressurizing space portion that is pressurized in order to deliver a predetermined amount of molten metal m stored in the constant hot water surface chamber 2 to the casting machine. It is configured.
In this case, in order to adjust the volume of the fitting adjustment unit 72 so as to change the amount of hot water supplied to the casting machine, by changing the protruding length, diameter or width of the fitting adjustment unit 72, and the shape, etc. Done.

Specifically, as the shape of the fitting adjustment portion 72 in the second embodiment, for example, a substantially circular cross section as shown in FIG. 4A, or a substantially semicircular cross section as shown in FIG. Alternatively, a shape such as a substantially oval cross section as shown in FIG.
The amount of hot water supplied to the casting machine can be changed by changing the protruding length, diameter, or width of the fitting adjusting portion 72 and also the shape of the hot water adjusting body 7.
Furthermore, even when such a fitting adjustment portion 72 is used, it is possible to have a separate structure from the lid portion.

  It should be noted that the present invention is not limited to the illustrated embodiments, and can be implemented with configurations within a range that does not deviate from the contents described in the respective claims.

Sectional drawing which shows an example of implementation which concerns on the 1st form of this invention, and made the volume of the pressurization space the maximum. Sectional drawing which shows the state which reduced the volume of the pressurization space. Sectional drawing which shows an example of implementation which concerns on the 2nd form of this invention. Sectional drawing explaining the form of the fitting adjustment part which concerns on the 2nd form of this invention.

Explanation of symbols

1: Hot water supply device 2: Pressurization chamber 3: Holding furnace m: Molten metal A: Discharge pipe B: Hot water supply pipe 5: Constant hot water surface chamber 6: Pressurization space 7: Hot water adjustment body 71: Lid 72: Fit adjustment Part

Claims (6)

  A holding furnace for holding the molten metal; and a pressurizing chamber for supplying a predetermined amount of the molten metal held in the holding furnace to the casting machine. And a pressurizing space that is pressurized in order to deliver a predetermined amount of molten metal stored in the constant hot water surface chamber to the casting machine, and is installed in the pressurizing space. A hot water supply apparatus for a molten metal, wherein a hot water adjustment body for changing the volume inside the pressurizing space to increase or decrease the amount of hot water discharged to a casting machine by being inserted is provided so as to be replaceable.   The hot water supply device for molten metal according to claim 1, wherein the hot water adjustment body is formed to serve also as a lid for sealing the pressurizing chamber.   The tapping amount adjusting body is formed to serve as a lid for sealing the pressurizing chamber, and the pressurizing space is simultaneously inserted into the pressurizing space by sealing the pressurizing chamber with the lid. The hot water supply apparatus for molten metal according to claim 1, further comprising a fitting adjustment portion that varies an internal volume.   The fitting adjusting portion is formed in a cylindrical shape having a hollow inside and fitted into the pressurizing space so that the hollow portion is stored in the constant temperature surface chamber. The hot water supply device for molten metal according to claim 2 or 3, wherein the hot water supply device is a pressurizing space portion that is pressurized to supply a predetermined amount of hot water to a casting machine.   The fitting adjusting portion is loosely fitted to the pressurizing space and is mounted, and a molten metal in which a space portion between the outer periphery of the fitting adjusting portion and the inner surface of the pressurizing space is stored in the constant hot water surface chamber is caster The hot water supply device for molten metal according to claim 2 or 3, wherein the hot water supply device is a pressurizing space portion that is pressurized to deliver a predetermined amount of hot water.   The hot water supply apparatus for molten metal according to any one of claims 2 to 4, wherein the volume of the pressurizing space is increased or decreased according to the volume of the fitting adjustment portion.

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