JPH0230117Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a mold molten metal passage for introducing hot water into a mold, and particularly to a filter for removing slag and other foreign matter from the sprue forming the molten metal passage. The present invention relates to a mold molten metal passage having a mold molten metal passage.

[Conventional technology]

FIG. 6 shows a schematic diagram of a mold with a conventional hot water passage. In the figure, 1 is the upper mold, 2 is the lower mold,
A cavity 3 in which a casting is formed is formed in the mating portion of these molds 1 and 2. 4 is a hot water passage that communicates from the upper surface of the upper mold 1 through the lower mold 2 to the lower side of the cavity 3; A lower hot water pipe 4b is provided which is buried so as to communicate between the hot water pipe 4a and the space 3, and these hot water pipes 4a, 4b are provided.
As shown in FIG. 7, a reservoir 5 having a larger cross-sectional area than the runner pipe is formed at the mating surface of the upper mold 1 and the lower mold 2, which face each other. A filter 6 is installed so as to divide it into two parts.

The filter 6 is used to remove foreign substances such as slag contained in the pouring water and oxidized base metal that is scattered.It is made of a refractory material plate such as fine ceramic with many small holes, or a ceramic woven cloth. It is composed of etc.

Therefore, the hot water poured into the hot water socket 7 flows down through the upper hot water pipe 4a, the filter 6, and the lower hot water pipe 4b, and is introduced into the cavities 3 of the molds 1 and 2. At this time, foreign matter such as slag mixed in the pouring water is removed by the filter 6, and the foreign matter captured by the filter is pushed toward the inner circumferential wall of the reservoir chamber 5 at the periphery of the filter and accumulates thereon.

FIG. 8 shows another example of a conventional mold molten metal passage, in which an upper molten metal passage pipe 4a and a lower molten metal passage pipe 4b of the same diameter are butted against each other at the mating surface position of the molds 1 and 2, and the butted end surfaces A filter 8 is interposed in between,
It is designed to remove foreign matter that gets mixed into the casting water.

[Problem that the invention attempts to solve]

In the mold hot water passage shown in FIGS. 6 and 7 above,
The effective hot water passing area of the filter 6 is defined as the hot water passage pipes 4a and 4b.
Since the flow rate of the hot water passing through the filter 6 can be lowered and the removal efficiency of foreign matter can be improved, since the reservoir chamber 5 is molded with mold material, the mold material on the peripheral surface of the reservoir chamber is In addition to the problem of the mold material being eroded by the flow and getting mixed into the hot water, the number of man-hours required to form the reservoir chamber 5 in the mold and install the filter 6 increases, which increases the price of the mold and, ultimately, the product price. There was a problem with increasing the

In addition, in the method shown in FIG. 8, the hot water passage is formed by a hot water path pipe, so it is possible to prevent water from entering the hot water due to erosion of the mold material, but since the effective area of the filter 8 is small, this part There were problems such as creating a large resistance, impairing the fluidity of the molten metal, and having an adverse effect on the casting temperature.

[Purpose of invention]

This invention was developed to solve the above problems, and it not only makes it easier to form the hot water passage into the mold, but also eliminates the mixing of mold material into the hot water, and improves the efficiency of removing foreign substances. The purpose of the present invention is to provide a mold hot water path that can be improved.

[Means for solving problems]

In the mold hot water passage according to the present invention, the hot water passage for pouring into the mold is formed of a fire-resistant and corrosion-resistant material, and an expansion chamber having a cross-sectional area larger than the hot water passage is integrally formed in the middle of the hot water passage. At the same time, a filter for removing foreign matter from the bath water is integrally provided in this expansion chamber.

[Effect of invention]

In this invention, by configuring the filter and the expansion chamber integrally with the hot water passage, it is easy to mold the hot water passage into the mold, and the mold material is prevented from being eroded by the poured hot water. By integrally providing the filter, the effective area of the filter is expanded and the intended purpose can be achieved.

[Example of idea]

Hereinafter, embodiments of the present invention will be described based on the drawings.

1 and 2 show an embodiment of the mold passageway according to the present invention, with FIG. 1 being a schematic sectional view of the mold, and FIG. 2 being a sectional view showing details of the mold passageway.

In Fig. 1, the casting mold is composed of an upper mold 1 and a lower mold 2, as in the past, and a cavity 3 for molding a cast product is provided at the joint of both molds 1 and 2. ing. The difference between this embodiment and the conventional one lies in a hot water passage 10 for introducing hot water into the mold from a hot water socket 7, and this hot water passage 10 is formed inside the upper mold 1 so as to communicate with the hot water socket 7. It consists of an upper hot water passage 11 and a lower hot water passage 12 formed inside the lower mold 2 so as to communicate with the upper hot water passage 11 and to communicate with the cavity 3. Erosion-resistant and fire-resistant, such as alumina, which will not be eroded by flow.
It is constructed by embedding a runner pipe 11a made of a material such as mullite in a mold 1.

Further, the lower hot water passage 12 has an expansion chamber 1 having a cross-sectional area larger than the cross-sectional area of the lower hot water passage 12 in the middle thereof.
As shown in FIG. 2, the expansion chamber 13 has a pair of hopper members 13a, 13 made of the same corrosion-resistant and fire-resistant material as the hot water pipe 11a.
A filter 14 is interposed between the mating end surfaces of both hopper members 13a and 13b to remove foreign matter from the pouring water, and these three members are integrated into one body. It is joined. The small diameter opening of the hopper member 13a constituting the expansion chamber 13 is provided with the upper hot water passage 1.
A corrosion-resistant and fire-resistant runner pipe 15 similar to the runner pipe 11a is connected to the runner pipe 11a of the hopper member 13b. Erosion-resistant and fire-resistant runner pipes 16 are respectively joined. Therefore, by embedding this integrated body in the lower mold 2, the lower hot water passage 12 is formed.

In the mold hot water passage of this embodiment configured as described above, when hot water is poured into the hot water socket 7, the hot water passes through the upper hot water passage 11 and the lower hot water passage 12 into the spaces 3 of the molds 1 and 2. be introduced. Further, while the casting hot water flows through a filter 14 installed in the expansion chamber 13, foreign matter such as slag mixed into the hot water is removed and pushed toward the inner wall of the expansion chamber 13.

Therefore, according to this embodiment, the hot water passage pipes 15, 1 made of refractory material forming the hot water passage, especially the lower hot water passage 12,
6. Since the expansion chamber 13 and the filter 14 are integrated, it is easy to form a hot water passage into the mold, and the inner wall of the hot water passage is covered with a fire-resistant and corrosion-resistant material, so that hot water does not flow into the mold. Since there is no contact, there is no erosion of the mold material due to the flow of the pouring metal, and it is possible to prevent the mold material from being mixed into the product.

Further, the filter 14 is installed in the expansion chamber 13, and by making its effective area larger than the cross-sectional area of the hot water passage, the speed of the hot water flowing in the hot water passage 10 is kept constant, and the flow rate in the filter portion is kept low. Accordingly, the calculation and design of the hot water passage system becomes easier, and the foreign matter removal efficiency of the filter can be improved.

FIG. 3 shows a modification of the lower hot water passage 12 in the present invention. In this embodiment, the expansion chamber 13 has a hopper part 13a and a filter 1 is installed in the large diameter opening of the hopper part 13a.
4, and an elbow member 13c that is butted against each other via 4.

Further, FIG. 4 shows that a filter 14 is integrally attached to the large diameter opening of one hopper member 13a forming the expansion chamber 13, and a filter 14 is integrally attached to the large diameter opening of one hopper member 13b forming the expansion chamber 13.
The hot water passage is formed by combining the two as shown in Figure 2.

Of course, the same effects as the embodiment shown in FIGS. 1 and 2 can be obtained in the hot water passage of the above-described modification.

FIG. 5 shows an expansion chamber 13 that constitutes the lower hot water passage 12.
An application example will be shown in which the mold is horizontally buried in the lower mold 2. In this application example as well, the same effects as above can be obtained.

[Effect of idea]

As described above, according to the present invention, the hot water passage for pouring into the mold is formed of a fire-resistant and corrosion-resistant material, and an expansion chamber with a larger cross-sectional area is integrally formed in the middle of the hot water passage. Since a filter for removing foreign matter from the hot water is integrally provided in this expansion chamber, the integral construction of the hot water passage and the filter facilitates the work of forming the hot water passage inside the mold.
The injected hot water does not come into contact with the surface of the mold, and it is possible to prevent the mold material from getting mixed into the product. In addition, by making the effective area of the filter larger than the cross-sectional area of the hot water passage, the flow rate of the pouring metal can be controlled, which simplifies the design of the hot water passage system.
This has the effect of improving filter efficiency.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a mold equipped with a mold hot water passage according to the present invention, Fig. 2 is an enlarged sectional view of the hot water passage portion of the filter installation part in Fig. 1, and Figs. 3 and 4 are the present invention. FIG. 5 is a schematic cross-sectional view of a mold showing another example of application of the mold passage of the present invention, and FIG. 6 is an example of application of a conventional mold passage to a mold. 7 is a sectional view showing details of a conventional filter installation part, and FIG. 8 is a sectional view showing another example of the conventional filter. 1... Upper mold, 2... Lower mold, 3... Blank space, 1
0... Hot water passage, 11... Upper hot water passage, 11a...
Hot water pipe, 12...lower hot water passage, 13...expansion chamber,
14... Filter, 15, 16... Hot water pipe.

Claims (1)

[Scope of utility model registration request] The hot water passage for pouring into the mold is formed of a fire-resistant and corrosion-resistant material, and an expansion chamber with a larger cross-sectional area than the hot water passage is integrally formed in the middle of the hot water passage. A mold hot water passage characterized by being integrally provided with a filter for removing foreign matter.