JP4678978B2 - Hot water supply system for molten metal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water supply apparatus for supplying a molten metal (hereinafter simply referred to as a molten metal) to a casting machine, and in particular, to a molten metal hot water supply apparatus for supplying a molten metal to a casting machine at a fixed rate every casting cycle. It is about.
As a casting machine to which the molten metal hot water supply apparatus according to the present invention is suitably applied, after the molten metal is filled in the mold cavity at low speed and low pressure, the molten metal in the cavity is pressurized at low speed and high pressure with a pressurizer. There is a low-speed and high-pressure casting machine for casting (see JP-A-8-132212, etc.).
[0002]
[Prior art]
When supplying molten metal to the casting machine (in the mold cavity), if impurities such as oxides enter the molten metal, defects will occur in the cast product, so the molten metal is supplied to the casting machine (in the mold cavity). It is required that impurities such as oxides mixed in the molten metal be removed as much as possible.
Therefore, in the past, a filter or the like for removing impurities such as oxides was installed at the inlet and outlet of the molten metal in the furnace, but the installation of the filter itself is troublesome or the installed filter is clogged early. There was a problem such as.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of such conventional problems, and can supply a clean molten metal free of impurities such as oxides to the casting machine side and simultaneously filter the molten metal. It is an object of the present invention to provide a hot water supply device for molten metal that can be easily installed and can be used for a long period of time.
[0004]
[Means for Solving the Problems]
The molten metal hot water supply apparatus of the present invention that achieves such an object connects a molten metal inlet and a hot water supply pipe formed in a constant hot water surface furnace that is open to the atmosphere, the upper part of which is sealed with a canopy and the lower part is openable and closable. established a hot water pot melt discharge port is formed, the hot water system for molten metal which is adapted to supply the molten metal to the casting machine through the hot water supply pipe from the molten metal discharge port by pressurizing the interior of the fed-water pot, before Symbol the molten metal inlet allowed formed at the bottom of the hot water pot, formed in a substantially tubular shape having an inner diameter larger than the inner diameter of the front Symbol melt inlet filter for filtering molten metal, SL before the filter on the inner bottom portion of the hot water pot It is characterized by being installed upright so as to surround the molten metal inlet (claim 1 ).
Further, the it is preferred that allowed to installing the filter on the lower position than Teiyu plane reference surface (claim 2).
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific preferred embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the illustrated embodiments.
In the figure, A indicates a holding furnace, B indicates a constant hot water surface furnace, and C indicates a hot water supply pot. The holding furnace A and the constant hot water surface furnace B are continuously and integrally constructed in parallel. Is installed so as to be immersed in the molten metal of the constant temperature furnace B.
[0006]
The holding furnace A is for storing a large amount of the molten metal M to be supplied to the constant hot water surface furnace B, and has a sufficiently large volume compared to the constant hot water surface furnace B, and is configured to be open to the atmosphere. The constant hot water surface furnace B communicates with the lower part of the furnace through a communication port 1, which is openable and closable by a molten metal opening / closing valve 2.
At this time, the bottom surface A ′ of the holding furnace A is set equal to or higher than the constant hot water surface L ₁ of the constant hot water surface furnace B, and the height position of the communication port 1 is set to the constant hot water surface of the constant hot water surface furnace B. than L ₁ is set to below.
[0007]
The constant temperature furnace B is for holding a required amount of molten metal M ′ to be supplied to a casting machine (not shown), and the upper portion thereof is covered with a furnace lid 3 so as to be open to the atmosphere. be provided with a molten metal surface detection sensor 4 for detecting the Teiyumen L ₁ side furnace B, the lower portion of the hot water pot C is installed so that submerged in the molten metal M 'in the furnace.
[0008]
The hot water supply pot C is for supplying the molten metal M ″ to the casting machine at a fixed rate every casting cycle, and is formed at the bottom of the pot body 5 and the canopy 6 for sealing the pot body 5 and the upper part thereof. It consists of an on-off valve 8 for opening and closing the molten metal inlet 7 and a filter 9 for filtering the molten metal M ′ entering the pot through the molten metal inlet 7, and the lower part of the pot body 5 is a constant hot water surface. It arrange | positions so that it may immerse in the molten metal M 'in the furnace B. FIG.
[0009]
That is, the upper part of the pot body 5 is sealed with a canopy 6 so that it can be opened and closed, and the molten metal inlet 7 for taking the molten metal M ′ in the constant temperature surface furnace B into the pot body 5 at the center of the bottom of the pot body 5. Is formed. The molten metal inlet 7 can be opened and closed by an on-off valve 8 provided so as to be movable up and down along the longitudinal direction of the pot body 5, and a filter for filtering the molten metal M ′ before or after the molten metal inlet 7. 9 is installed.
Further, a molten metal discharge port 10 is formed in the lower side wall portion of the pot main body 5 to send out the molten metal M ″ taken into the pot main body 5 to the casting machine side. It allowed formed from the surface L ₂ in the down position, the caster side and communicating connected hot water supply pipe D is communicatively connected to the molten metal discharge port 10.
[0010]
And Thus, after incorporating predetermined amounts molten metal M 'from the molten metal inlet 7 into the hot water pot C (pot body 5) of Teiyu plane furnace B by opening the on-off valve 8 (up Teiyumen L _1), The on-off valve 8 is closed to close the molten metal inlet 7, and in that state, air or an inert gas is supplied from the gas supply pipe 11 into the hot water supply pot C (pot main body 5) to supply the hot water supply pot C (pot main body 5). When the inside is pressurized, the molten metal M ″ in the hot water supply pot C (pot body 5) is supplied to the casting machine from the molten metal discharge port 10 to the casting machine through a hot water supply pipe D. Then, the hot water pot C (pot body 5) is heated. The molten metal level of the molten metal M ″ is lowered to the constant molten metal surface reference surface L ₂ where the molten metal surface level is set.
After the hot water supply to the casting machine is completed, the interior of the hot water supply pot C (pot body 5) is returned to atmospheric pressure, the on-off valve 8 is opened, and the molten metal inlet 7 of the hot water supply pot C (pot body 5) is opened. Then, the molten metal M ′ in the constant hot water surface furnace B flows from the molten metal inlet 7 into the hot water supply pot C (pot body 5) through the filter 9, and the hot water surface level before hot water supply, that is, in the constant hot water surface furnace B Up to the constant hot water level (fixed hot water surface L ₁ ) of the molten metal M ′. Thereafter, similarly, the molten metal M ″ in the hot water supply pot C (pot body 5) is supplied to the casting machine in a fixed amount every casting cycle.
[0011]
The filter 9 is for filtering the molten metal M ′ entering the pot through the molten metal inlet 7, and is installed both before and after the molten metal inlet 7 or at the front or the rear. Specifically, the filter 9 is formed in a substantially flat plate shape or sheet shape using a material made of a porous ceramic material, glass wool or the like, and is located in front of the molten metal inlet 7 (outside the pot body 5) or behind (pot body). Or the filter 9 is formed in a substantially cylindrical shape having an inner diameter larger than the inner diameter of the molten metal inlet 7, preferably in a substantially cylindrical shape, as shown in the illustrated embodiment. The filter 9 is arranged so as to surround the mouth 7, that is, the axis of the filter 9 formed in a substantially cylindrical shape is aligned with the center of the molten metal inlet 7, and is installed upright on the inner bottom surface of the pot body 5. Is.
[0012]
When the filter 9 is formed in a substantially cylindrical shape and installed upright on the inner bottom surface of the pot body 5, the molten metal M ″ passing through the filter 9 from the molten metal inlet 7 and entering the pot body 5 is the constant temperature hot water. not to cross the molten metal M 'in the plane furnace B, a substantially cylindrical shape with a material which is impervious to molten metal as the length formed so as to be higher than Teiyumen L ₁ or the embodiment shown, the filter 9 The filter 9 is installed so as to be pressed onto the inner bottom surface of the pot body 5 by a filter presser 12 formed on the inner surface of the pot body 5. Reference numeral 13 in the figure denotes a heat insulating material. it is preferred that from L ₂ allowed to set up a little in the down position.
[0013]
【The invention's effect】
According to the hot water supply device for a molten metal according to the invention of claim 1, wherein the molten metal inlet allowed formed at the bottom of the hot water pot, substantially having the filter an inner diameter larger than an inner diameter of the molten metal inlet for filtering molten metal It is formed in a cylindrical shape, and the filter is installed upright on the inner bottom portion of the hot water pot so as to surround the molten metal inlet. It can supply molten metal and does not take up a place to install a filter for filtering molten metal in the hot water pot. At the same time, it is easy to install the filter and uses the installed filter for a long time. It becomes possible to do .
[0015]
Furthermore, according to the hot water supply apparatus for molten metal according to the invention described in claim 2 , since the filter is installed at a position below the reference surface level, the molten metal in the hot water pot is supplied to the casting machine in a fixed amount. Therefore, even if the hot water level in the hot water supply pot (pot body) is lowered, the filter does not come into contact with the atmosphere, so that the installed filter can be used for a long time.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing an example of the embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a hot water supply pot.
[Explanation of symbols]
A: Holding furnace B: Constant hot water furnace C: Hot water pot D: Hot water pipe 1: Communication port 2: Molten open / close valve 3: Furnace lid 4: Hot water level detection sensor 5: Pot body 6: Canopy 7: Molten metal inlet 8 : on-off valve 9: filter 10: molten metal discharge port 11: gas supply pipe 12: filter retainer 13: heat insulating material _{L 1:} Teiyumen L _2: Teiyumen reference plane M, M ', M ": melt

Claims (2)

A hot water pot having a molten metal inlet formed in a constant temperature furnace that is open to the atmosphere and sealed with a canopy and that can be opened and closed at the lower part and a molten metal outlet that connects the hot water pipe is provided. In the hot water supply apparatus for molten metal, which is configured to supply the molten metal from the molten metal discharge port to the casting machine by pressurizing the inside of the molten metal,
The molten metal inlet is formed at the bottom of the hot water pot, a filter for filtering the molten metal is formed in a substantially cylindrical shape having an inner diameter larger than the inner diameter of the molten metal inlet, and the filter is formed at the inner bottom of the hot water pot. A hot water supply apparatus for molten metal, characterized in that it is installed upright so as to surround the molten metal inlet . The hot water supply apparatus for molten metal according to claim 1, wherein the filter is installed at a position below the reference surface of the constant hot water surface.

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