JPS586596Y2 - template - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sand mold, and is particularly suitable for a mold requiring a runner having a relatively large cross-sectional area.

Generally, when the weight of a cast product is large or when the weight of one cast is large, the cross-sectional area and length of the runner for guiding the poured molten metal are often increased.

It is not easy to break and remove the runner of such a cast product, which is made by pouring molten metal into a mold and releasing the mold after cooling.

In addition, since the broken and removed runners are not suitable as return waste if they are long, they must be cut into small pieces using a gas cutter or the like, which requires a lot of man-hours.

An object of the present invention is to provide a mold that can be easily broken and removed even in large runners, and that can be divided.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view, and FIG. 2 is a sectional view taken along the line II in FIG. 1.

A plurality of runners A with a relatively large cross-sectional area for guiding molten metal into the product cavity 1 are connected by another runner B, and the cross-sectional shape of the runner B is as shown in Fig. 2. It has a flat shape, and its cross-sectional area is approximately the same as that of runner A.

The effects of the above configuration will now be explained.

The molten metal injected into the sprue 2 passes through runners A and B and flows into the product cavity 1 from the weir 3.

When the mold is broken up using a shaker after cooling, it breaks at the weir 3 and the runner B, so the runner A is cut into appropriate lengths as return waste.

Therefore, there is no need for extra man-hours such as gas cutting, and a significant cost reduction effect can be obtained.

Since the runner B has a narrow cross section, it also has the effect of preventing dross and other foreign matter from getting mixed in, and brings about favorable results in preventing casting defects and improving quality.

As is clear from the above explanation, when the mold of the present invention is used to break down the mold, the runners are not only broken and separated into appropriate lengths (also effective in preventing foreign matter from entering). It has a significant effect on cost reduction and productivity improvement.

[Brief explanation of the drawing]

FIG. 1 is a plan view, and FIG. 2 is a cross-sectional view of FIG. Explanation of symbols: A, B... runner, 3... weir.

Claims (1)

[Scope of utility model registration request] A plurality of runners A having a relatively large cross-sectional area and substantially parallel are connected by another runner B that is substantially orthogonal to the runner A, and the cross-section of the runner B is flat, and the cross-sectional area is is a mold equipped with a runner having approximately the same cross-sectional area as runner A above.