JPS5853157Y2 - sprue cup - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sprue cup, and more particularly to a sprue cup suitable for use by being attached to a multiskies head for making sand molds.

In order to make the hardness of sand molds uniform, multi-skies heads are generally widely used, especially in high-pressure molding tanks.

When shaping a sprue using this multi-squeeze head, the molding work is carried out by fixing the sprue cup 3 to two multi-squeeze heads corresponding to the vertical runner 1, as shown in FIG.

Therefore, in the released mold 4, the sprue 5 shaped by the sprue cup 3 and the vertical runner 1 do not communicate with each other, and foundry sand remains between them.

Therefore, a sprue cutting operation using a sprue cutter is required, which impedes improvement in the efficiency of the molding operation.

On the other hand, since the hot water bath cup 3 is fixed to two specific multiskies heads, the position of the vertical hot water bath 1 is also limited to one place.

Therefore, there are great restrictions when selecting a casting method, which hinders improvements in quality and yield, and cannot be said to be a preferred method.

An object of the present invention is to provide a sprue cup for a multi-skies head that does not require sprue cutting work and allows the sprue cup to be placed in any position.

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

FIG. 1 is a vertical cross-sectional view of the mold during molding, and FIG. 3 is a vertical cross-sectional view of the sprue cup and multiskies head.

A plurality of arbitrarily adjacent multi-skies heads 2
A recess 6 is provided on the lower surface of B.

On the other hand, a sprue cup 10 having a protrusion 7 that fits into the plurality of recesses 6, a sprue shaping protrusion 8 on the lower surface, and a sand removal hole 9 that can be penetrated in the vertical direction is inserted into the multi-skies head 2B.

Further, a recess 11 is provided on the outer periphery of the convex portion 7 of the sprue cup 10.

Furthermore, the multi-skies head 2B includes a piston rod 14 pressed by a spring 13 in a cavity 12 that communicates with a pressure fluid source (not shown).
The tip of 4 engages with the recess 11.

Next, the effects of the above configuration will be explained.

In FIG. 3, since pressure fluid is acting through the two-way valve 15, the piston 14 overcomes the repulsive force of the spring 13 and moves forward, so that the tip of the piston 14 is engaged with the recess 11 of the sprue cup 10.

In other words, the sprue cup 10 is firmly held by the multiskies head 2B.

In addition, the joint between the sprue cup 10 and the multi-skies head 2B is completely sealed and there is no part that comes into contact with the foundry sand, so there is no wear and tear on the parts, and the replacement work of the sprue cup 10 can be carried out very smoothly. be.

When removing the sprue cup 10 from the multi-skies head 2B, the two-way valve 15 is operated to block the entry of pressure fluid, and the repulsive force of the spring 13 causes the piston 14 to be removed.
moves back to the right.

Therefore, since the tip of the piston 14 is removed from the recess of the sprue cup 10, the sprue cup 10 can be easily removed from the multi-skies head 2B.

Multi-skies head 2 with sprue cup 10 removed
A head 16 or a head 17 is attached to B as shown in FIG. 4 or FIG. 5, and it exhibits the same function as the other multi-skies head 2C.

The method for attaching the heads 16 and 17 to the multiskies head 2B is exactly the same as the method for attaching the sprue cup 10.

In Fig. 3, the sprue cup 10 is attached to two adjacent multi-skies heads 2B, so the inner diameter of the trick hole 9 is relatively small (Fig. 6 shows a plan view). Cup 10 with 3 multiskies heads 2B
By attaching it to the hole, the inner diameter of the trick hole 9 can be increased.

Furthermore, by attaching the sprue cup 10 to the four multi-skies heads 2B as shown in FIG. 8, it is possible to further increase the inner diameter of the trick hole 9.

As is clear from the above explanation, by implementing the sprue cup according to the present invention, the sprue and the vertical runner can be completely communicated, which simplifies the sprue cutting work. It is possible to improve the efficiency of the molding work without applying excessive pressure to the model.

In addition, it is not necessary to apply multi-skies head 2B to all parts, but by applying it only to a few places such as the center, both ends, or corners, it is possible to freely select the casting method, which improves quality and yield. It has a dramatic effect.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a mold made by the conventional method, Fig. 2 is a longitudinal cross-sectional view of a mold according to the present invention, Fig. 3 is an enlarged cross-sectional view of the main part of the sprue cup, and Figs. 4 to 8 are implementation guidelines. FIG. 2A, 2B, 2C...Multi skies head,
3.10... Sprue cup, 6... Concave portion, 7... Convex portion, 8... Sprue shaping protrusion,
9...Exquisite hole, 11...Indentation, 12
...Gap, 14...Piston rond.

Claims (1)

[Scope of utility model registration request] In a sprue cup for a multi-skies head for making a sand mold, the sprue cup has an annular convex part on the upper part that fits with the multi-skies head, a sprue shaping protrusion on the lower part, and a sprue forming protrusion in the lower part. A sprue cup characterized by having a sand removal hole that can be penetrated in the vertical direction and a recess for retention around the upper convex part.