JP2803128B2 - High pressure casting equipment for composite materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a molded article of a reinforcing material used as a heat-resistant component of an internal combustion engine of an automobile, a motorcycle, an outboard motor, and the like. TECHNICAL FIELD The present invention relates to a composite material high-pressure casting apparatus for producing a composite material (composite metal material) by impregnating a composite material with a light metal, and more particularly to a preheating apparatus for a compact in the composite material high-pressure casting apparatus.

(Prior art) Recently, ceramic composite materials used for heat-resistant components such as internal combustion engines include metal materials (Al, Mg, Ti, or alloys thereof) and nonmetals (silicon carbide, silicon nitride, Composite reinforced alloys of fine particles of ceramics or the like or fibers thereof (whiskers) have already been proposed.

In other words, the high-pressure casting means that has already been proposed, when manufacturing a composite metal material (composite material), for example, a molded body (preform) of a reinforcing material such as SiC, SiN, etc. Without preheating, it is difficult to obtain a good quality product because compounding is not effectively performed. The preform is preheated in advance, and the preform is immediately placed in a pair of lower mold and upper mold having a pressurizing plunger device for hot water supply in a composite high-pressure casting apparatus. A composite material is manufactured by injecting a melted light metal material at a high pressure from a hot water supply pressurized plunger and impregnating the molded product with the light metal material.

That is, as shown in FIG. 6, the high-pressure casting means that has been already provided is provided with a pair of lower mold 1 and upper mold 2 in a composite material high-pressure casting apparatus. The molded body W can be installed, and is removably fixed with an attachment member 4 such as an attachment bolt.
Is provided with a pressurizing plunger device 5 for hot water supply, which communicates with the molded body W of the lower nest 3, and accommodates the upper nest 6 in the upper mold 2 located immediately above the lower nest 3. The mounting member 7 is provided so as to be detachably fixed.

Therefore, the above-described high-pressure casting means heats the reinforcing material W made of SiC, SiN or the like in advance by a preheating furnace (not shown) installed in another place, and heats the preform 3 After that, a pair of the lower mold 1 and the upper mold 2 are clamped, and then hot water is supplied by the hot water pressurizing plunger device 5 to perform pressure casting.

(Problems to be Solved by the Invention) However, the preheating furnace used for the high-pressure casting means described above heats the compact W from the outside by the radiant heat of the electric heater, so that the porosity is about 80%. It takes a lot of time to heat the core (center) of the body W, and it is not only difficult to save labor by mass production, but also because the working cycle time of the high-pressure casting means is short, the above-mentioned preheating furnace is enlarged. Since it is inevitable to prepare a large number of compacts W by preheating them in advance, there is a problem with high-pressure casting means of a small number and variety.

The present invention has been made in view of the above-mentioned circumstances, and is directed to a high-pressure casting apparatus for a composite material provided with a pair of a lower die and an upper die provided with a pressure plunger device for hot water supply. In addition to shortening the work cycle time, the molded body at room temperature can be installed in the lower mold as a mold, eliminating the need to handle the molded body at high temperature, improving workability, Accordingly, it is an object of the present invention to provide a high-pressure casting apparatus for a composite material capable of performing high-pressure casting of many kinds in a small amount.

[Configuration of the invention]

(Means for Solving the Problems and Action Thereof) The present invention relates to a composite material high-pressure casting apparatus provided with a pair of lower mold and upper mold having a pressurizing plunger apparatus for hot water supply. A lower nest and an electrode body for installing the body are provided, and an upper nest provided with an electrode in the upper mold located immediately above the lower mold is provided so as to be able to conduct electricity to the molded body,
A preheating furnace is formed in the lower mold, and the molded body W in the lower nest is preheated in advance by an electrode body. Immediately thereafter, hot water is supplied by a hot water supply pressurizing plunger to perform pressure casting. Since the work cycle time of the high-pressure casting means can be shortened and the molded body at room temperature can be installed in the lower mold as a mold, it is no longer necessary to handle the molded body at high temperature, and the workability is improved. This eliminates the need for a large-scale preheating furnace and enables high-pressure casting of many kinds of small quantities.

(Embodiment) Hereinafter, the present invention will be described with reference to one embodiment shown in the drawings.

In the present invention, the same components as those in the above-described specific example will be described with the same reference numerals.

1 to 5, reference numerals 1 and 2 denote a pair of heat-resistant lower and upper dies in a high-pressure composite material casting apparatus. The lower dies 1 include, for example, SKD (JIS G4404).
The lower nest 3 made of a material such as SiC, SiN
And the like, so that a conductive molded body (preform) W can be installed, and is detachably fixed by an attaching member.
The lower die 1 is provided with a pressurizing plunger device 5 for hot water supply, which communicates with the molded body W in the lower insert 3.
Further, the upper die 2 located immediately above the lower nest 3 includes:
The upper nest 6 is provided so as to be able to accommodate the molded body W and is detachably fixed by a mounting member 7. An electrode body 8 is provided immediately below the molded body W in the lower nest 3. Have been. Further, the electrode body 8 is connected to the electrode 9 of the upper insert 7 via a power supply 10, and when the molded body W is preheated, by energizing the electrode body 8 and the electrode 9, The compact W is heated together with the nest 3 so that the molded body W can be placed on the lower nest 3 at room temperature.

 Hereinafter, the operation of the present invention will be described.

2 to 5, the molded body W at normal temperature is previously set on the lower insert 3 of the lower mold 1 (see FIG. 2). Next, after the upper mold 2 provided with the upper nest 6 is overlapped with the lower nest 3 of the lower mold 1 on which the molded body W is installed and the mold is clamped (see FIG. 3), FIG. As shown in (2), a current is supplied to the compact W, and the compact W is preheated to about 720 ° C. Next, as shown in FIG. 5, the preheated compact W is cast immediately by hot-pressing a metal such as an Al alloy with a hot-water pressurizing plunger device 5 as shown in FIG. I do.

As described above, according to the present invention, since the molded body W at normal temperature can be set in the lower mold 1 as a mold, there is no need to handle the molded body W at high temperature, and high-pressure casting of a small quantity and various types can be performed.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in a composite material high-pressure casting apparatus provided with a pair of lower molds and an upper mold provided with a pressurizing plunger device for hot water supply, A nest and an electrode body are provided, and an upper nest provided with electrodes on the upper mold located immediately above the lower mold is provided so as to be able to conduct electricity to the molded body, and a preheating furnace is configured in the lower mold,
Since the compact W in the lower nest is preheated in advance by the electrode body, and immediately thereafter, hot water is supplied by the pressurizing plunger device for hot water supply and pressure casting is performed, the operation cycle time of the high pressure casting means is increased. In addition to shortening the length of the compact, the compact to be preheated can be installed in the lower nest of the lower mold, eliminating the need for handling high-temperature compacts, improving workability, and This also eliminates the need for a preheating furnace, and has excellent effects such as high-pressure casting of many kinds in a small amount.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a high-pressure casting apparatus for a composite material of the present invention. FIGS. 2 to 5 are views for explaining a high-pressure casting process of the present invention. The figure is a cross-sectional view of an already proposed composite material high-pressure casting apparatus. DESCRIPTION OF SYMBOLS 1 ... Lower type, 2 ... Upper type, 3 ... Lower nest, 5 ... Pressurized plunger device, 6 ... Upper nest, 8 ... Electrode body, 9
…… electrode, 10 …… power supply.

Claims (1)

(57) [Claims] 1. A composite material high-pressure casting apparatus provided with a pair of lower mold and upper mold provided with a pressurizing plunger device for hot water supply, wherein a lower nest and an electrode body for installing a molded body are provided in the lower mold. An upper nest provided with electrodes on the upper mold located immediately above the lower mold is provided so as to be able to supply current to the molded body,
A high-pressure composite material casting apparatus characterized by casting after energization heating.