JPS62185859A - Reaction vessel for in-mold inoculation - Google Patents

Abstract

PURPOSE:To provide a titled reaction vessel which is simple in the construction of a runner, permits the thorough removal of the slag, dross, etc., in a molten metal and has an excellent inoculating effect by injecting an inoculator for inoculating a molten cast iron into the inside and forming the inflow side and outflow side for the molten metal of filters. CONSTITUTION:The above-mentioned reaction vessel is disposed with the net- like filters 3, 3 at both aperture ends of cylindrical foil 2 formed of a refractory material. The filters 3, 3 are adhered by caps 4, 4 to the aperture end of the foil 2. The reaction vessel 1 in which the inoculator 5 is sealed is disposed to the sprue part facing a parting plane as shown by a casting mold 11. The inoculator 5 can be easily disposed into the casting mold 11 simply by setting the reaction vessel 1 to the lower part of the sprue 15 of the casting mold 11 in the above-mentioned manner. The installation of the inoculator 5 and the operation for installing the filters 3, 3 are thus simplified and the runner 16 is made into the extremely simple construction. The slag, dross, etc., in the molten metal can be preliminarily removed by the filter 3 on the inflow side of the vessel 1 before the molten metal poured through the sprue 15 is admitted into the reaction vessel 1. Efficient inoculation is thus executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a reaction vessel for in-mold inoculation that can simplify the mold structure and promote the inoculation effect.

(Prior Art and Problems) As is well known, the in-mold inoculation method causes fading of the inoculant ((), and is an extremely useful inoculation method for operational purposes.

This method is carried out using a mold 21 as shown in FIG. This mold 21 includes an upper mold 22 formed by a sand mold.
A runner 26 is formed between a product casting space 24 formed inside the mold 21 and a sprue 25 formed in the upper mold 22. In the middle of Yudou 26,
A reaction chamber 28 containing an inoculant 27 is provided, and a filter 29 is provided at the upper end of the reaction chamber 28 . 30 is a feeder space.

In such a mold 21, the runner structure is complicated, and when the molten metal reacts with the inoculant 27 in the reaction chamber 28, the inoculation efficiency is reduced due to slag, dross, etc. in the molten metal, and furthermore, the slag, dross, etc. There was a problem in that the filter 29 did not remove the particles sufficiently.

The present invention was developed in view of such problems, and the runner structure is simplified, and slag, dross, etc. in the molten metal can be sufficiently removed.
A further object of the present invention is to provide a reaction container for in-mold inoculation that has excellent inoculation effects.

(Means for Solving the Problems) The present invention is characterized in that an inoculant for inoculating molten cast iron is sealed inside the sprue or runner. This is a reaction vessel for inoculation in a mold, which is disposed in a mold, and the molten metal inflow side and the molten metal outflow side are formed by filters.

(Example) Hereinafter, the reaction container of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, in which a reaction vessel 1 is
A mesh filter 3.3 is disposed at both open ends of the barrel tube 2 made of a fireproof material, and the cough mesh filter 3.3 is attached to the open end of the barrel tube 2 by a cap 4.4. . 5 is an inoculant sealed in a container.

The mesh filter 3 is woven from carbon fiber that can withstand high-temperature molten metal or glass fiber containing 75% by weight of 5iQ2, and the opening size can prevent inoculants, dross, etc. from passing through. Size. Usually 0.
4 to 4i is sufficient. Since a mesh filter has an excellent molten metal filtration effect, it is suitable as a filter that can be used in the present invention. On the other hand, the cap 4 is made of a refractory material or a high melting point metal material.

In this embodiment, a reticulated filter is used as the filter 3, but the present invention is not limited to this, and a foamed ceramic filter having a cavity communicating with the outside or a ceramic ivy filter having a honeycomb structure may be used. A reaction container can be formed by directly attaching the cap to the open end.

The reaction vessel 1 containing the inoculant 5 is placed in a sprue portion adjacent to the parting surface, as shown in the mold 1) in FIG. 2, for example. In the figure, 13 is a lower mold, 14 is a product casting space, 15 is a sprue, 16 is a runner, and 17 is a feeder space.

In such a mold 1), the reaction vessel 1 is connected to the sprue 15.
Since the inoculant can be easily placed in the mold by simply setting it at the bottom of the mold, the installation of the inoculant and the installation of the filter are simplified, and the runner 16 can be made into an extremely simple structure. can. Further, before the molten metal injected from the sprue 15 flows into the reaction vessel 1, slag, dross, nonmetallic inclusions, etc. in the molten metal are removed in advance by a filter on the inflow side of the vessel 1. Therefore, inside the reaction vessel l, slag,
The clean molten metal from which dross, etc. have been removed can be reacted with the inoculant, and inoculation can be carried out efficiently. Furthermore, slag, dross, etc. can be removed through the inlet and outlet filters of the reaction vessel l. Since the molten metal is removed in stages, the molten metal flowing out from the reaction vessel 1 becomes extremely clean.

FIG. 3 shows the sprue structure of a mold used in the second embodiment of the reaction vessel of the present invention. The entire circumference of this reaction vessel 1' is formed of a mesh filter, and consists of a recess 7 and a lid 8.

The concave portion 7 can be easily formed into a concave shape by applying phenol resin to a mesh filter, setting it between a male mold and a female mold, and heating this in an electric furnace at a temperature of 100 to 250°C. Ru.

After the inoculant 5 is stored in the recess 7, if the upper edge of the recess 7 and the lid 8 are adhered, the reaction container 1' can be easily handled.

(Effects of the Invention) As explained above, in the reaction container for inoculation in molds of the present invention, the molten metal inflow side and the molten metal outflow side are formed with filters, so the inoculant sealed in the container is Noro in advance by the filter.

It can come into contact with clean molten metal from which dross etc. have been removed, and the inoculation effect is extremely excellent. In addition, by storing the inoculant in the container, the inoculant and the filter can be compacted, the inoculant can be easily placed in the mold, and the runner structure can be simplified. can do. In addition, the molten metal is filtered in two stages with filters installed on the molten metal inflow side and the outflow side of the reaction vessel, so
Products can be cast using extremely clean molten metal.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a cross-sectional view showing an embodiment of the reaction container for inoculation in a mold according to the present invention, and FIG. 2 is a cross-sectional view of a mold in which the reaction container of the first embodiment is installed. FIG. 3 is a partial sectional view of a h-mold in which a reaction vessel of another embodiment is disposed, and FIG. 4 is a sectional view of a conventional in-mold inoculation mold. ■, 1°...Reaction container, 3...Mesh filter, 5
... inoculant, 15... sprue, 16... runner. Figure 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] (1) An inoculation reaction vessel for in-mold inoculation, which is filled with an inoculant for inoculating molten cast iron, and which is disposed in a sprue or runner, and the molten metal inflow side and molten metal outflow side are formed by filters. A reaction container for in-mold inoculation characterized by: