JPS5919567Y2 - Fixed amount pumping device for casting - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a metering molten metal pumping device for casting, and more particularly to a metering molten metal pumping device for pumping up a fixed amount of hot water melted in a melting furnace and supplying the hot water to a predetermined mold.

Generally, nonferrous metals with relatively low melting temperatures, such as Sn, Zn, Mg, and A1 alloys, are melted in a melting furnace, and the molten metal is pumped up in a hot water container and poured into a predetermined mold. .

As an example, in the case of aluminum alloys, conventional casting methods such as die casting, sand casting, shell molding, etc. melt aluminum at a relatively low temperature of around 600°C, so a melting furnace made of heat-resistant cast iron is used. A pot furnace (pot furnace) was often used, and the molten water was drawn up manually or mechanically using a container made of graphite, and then poured into the mold.

When pouring hot water into the oil mixed container, the amount of hot water is determined by the intuition of the worker, and the amount of hot water is not constant. There were problems in adjusting the amount of hot water in the casting process, such as the yield rate being poor because there was residual hot water, and the amount of rising hot water being too small.

The present invention was devised in view of the above-mentioned problems, and its purpose is to accurately pump a fixed amount of molten metal according to the amount of molten metal required to be poured into the mold, and also to be able to freely change the amount of molten metal poured. The purpose is to provide a metered water pumping device that can
A lid for opening and closing the opening of the container is supported on the opening side of the hot water container, and an inner lid for capacity control that can be inserted into the inside of the container is movably supported on the lid. The capacity of the inside of the container is controlled by adjusting the amount of water that rushes into the container, and the amount of hot water pumped is adjusted to a constant amount.

Embodiments of the device of the present invention will be described below based on the drawings.

In the figure, 1 is a top-opening water container made of heat-resistant materials such as graphite and ceramics, which is placed on top of a chromium-containing heat-resistant cast steel substrate 2 and fixed by mounting means 3 such as bolts. .

A plurality of guide rods 4 are erected on the substrate 2, and a support 5 is fixed to the upper end of the guide rod 4. Alternatively, as shown in the drawings, it is attached to a holder 7 that is freely suspended from a guide rail 6.

This holder 7 has a chain 8 for horizontally turning the opening of the hot water container 1, and is forcibly movable along the rail 6 by a moving device (not shown). .

Therefore, the movement of the holder 7 moves the hot water container 1 between the melting furnace (not shown) and the mold (not shown), and the vertical bending of the rail 6 causes the hot water container 1 to move between the melting furnace (not shown) and the mold (not shown). is immersed in a melting furnace to form molten water, then the molten water container 1 is pulled up and moved to the mold, the molten water container 1 is turned horizontally at the mold position, and the molten water is poured into the mold. It is now possible to pour hot water into the tank.

The above-mentioned apparatus for drawing and pouring hot water is a conventional one, and this apparatus is not particularly limited.

As described above, this invention allows the amount of hot water to be pumped in the hot water container 1 to be adjusted to a constant amount, and a lid body 10 for opening and closing the opening of the hot water container 1 is provided on the opening side of the hot water container 1. A capacity control inner cover 11 that can be inserted into the container 1 is movably supported by the cover body 10, and by adjusting the amount of insertion of the inner cover 11 into the container, the inside of the container can be adjusted. The capacity of the hot water is controlled to adjust the amount of hot water to a desired constant amount.

The lid body 10 and the inner lid 11 are made of graphite, similar to the hot water container 1.
The inner lid 10 is made of a heat-resistant material such as ceramic, and has a sliding plate 12 that moves while being guided by the guide rod 4.
It is supported through a support cylinder 13 and moved by an actuator 14 such as an air cylinder interposed between the support body 5 and the sliding plate 12 to open and close the opening of the hot water container 1.

On the other hand, the inner lid 11 is supported by a rod 15a of an actuator 15 such as an air cylinder supported within the support cylinder 13.

In the above configuration, the amount of hot water pumped by the hot water container 1 can be set by operating the actuator 15 to adjust the amount of water flowing into the container 1 and adjusting the volume inside the container 1. I will do it.

In addition, when pouring hot water using the hot water container 1 adjusted in this way, the lid body 10 may be immersed in the melting furnace in an open state by the operation of the actuator 14, but preferably, the lid body 10 is immersed in the melting furnace with the lid body 10 closed. After immersion, the lid 10 is opened and hot water is poured into the container 1, and after the pouring is completed, the lid 10 is closed and hot water is poured.

In this case, a fixed amount of hot water can be pumped, and at the same time, the hot water container 1 is placed below the surface of the melting furnace surface layer, which has deteriorated due to oxidation due to direct contact with the air, making it possible to pump clean, high-quality hot water. becomes.

When pouring hot water with the lid 10 closed, an inert gas injection pipe 16 is attached to the lid 10, and the hot water container 1 is
It is also possible to seal an inert gas inside.

Taking aluminum alloy as an example, since this alloy absorbs a lot of gas when it is in a molten state, the parts that come into contact with air are likely to oxidize and reach the actual temperature. Close the lid body 10 before, and close this lid body 1.
0.1 to 0.2 kg/cm2 from the heat-resistant steel pipe for inert gas injection installed at
An inert gas such as nitrogen gas of about G is sealed in the hot water container 1.

In addition, the contact surface A between the hot water container 1 and the lid body 10 at this time of enclosing is 0°5~
By leaving an opening of about 1 mm, the air inside the hot water container 1 is replaced and the quality is prevented from deteriorating due to molten metal oxidation during hot water pouring.

Next, with the lid 10 closed, the hot water container 1 and the lid 10 are placed into the melting furnace as long as the lower actuator 15 is not immersed in the hot water.

The lid 10 is opened to draw hot water while the water is immersed in hot water.

After pouring hot water, the hot water container 1 is moved to the mold position, the lid 10 is opened, and hot water is supplied to the mold.

In order to prevent the hot water from coming into contact with the air, for example, the outer periphery of the hot water container is covered with a case (not shown) in which a part of the hot water supply part is cut out, and the hot water is passed through a heat-resistant steel pipe (not shown). It is also possible to supply hot water by tilting the hot water container 1 without blowing nitrogen gas into the case.The inner surface of the hot water container 1 is tapered to the extent that the nitrogen gas being reblown and the air do not mix. You can smoothly supply a fixed amount of hot water.

The material for the lid 10 of the hot water container 1 and the inner lid 11 is preferably one that has low wettability with non-ferrous metals.

For example, in the case of aluminum alloy, it is best to use graphite material, heat-resistant cast steel, ceramic, or heat-resistant cast iron containing chromium.
Its inner surface may be coated with a mixture such as fireclay and water glass to prevent the iron from alloying with the aluminum.

In addition, when adjusting the amount of oil pumped, the container 1 of the inner lid 11
This can be easily adjusted by changing the amount of inward thrust.

As described above, the present invention has a simple structure that uses a lid body that opens and closes the opening of the hot water container and an inner lid that can adjust the amount of water that enters the inside of the hot water container. Therefore, problems caused by too much or insufficient hot water can be reliably solved, and furthermore, the amount of hot water can be changed arbitrarily.

Moreover, since the hot water container can be immersed in the melting furnace with the opening closed by the lid, the need to pump up the men's hot water can be eliminated, and an inert gas can be sealed inside the hot water container. Oxidation of the bath water can be suppressed to a minimum during the bathing process.

[Brief explanation of drawings]

The drawing is a partially cutaway front view showing an embodiment of the present invention. 1... Boiling water container, 10... Lid body, 11... Inner lid.

Claims (1)

[Scope of utility model registration request] A lid for opening and closing the opening of the container is supported on the opening side of the hot water container, and an inner lid for capacity control that can be inserted into the inside of the container is movably supported on the lid. A quantitative hot water pumping device for casting, characterized in that the volume inside the container is controlled by adjusting the amount of water that rushes into the container, and the amount of hot water pumped is adjusted to a constant amount.