JP3321575B2 - Molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold apparatus for forming a blind riser using a riser block.

[0002]

2. Description of the Related Art In a case where the upper side of a feeder space is closed by a feeder block and a molten metal is accommodated in this space to form a blind feeder, it is necessary to provide a degassing means in the feeder block. There is. If the gas in the riser space and cavity cannot be released into the atmosphere as the molten metal is injected, the molten metal cannot be filled in the riser space to form a sufficient amount of riser, and the casting product is Although it is easy to cause turning around and sparkling, a vent hole is formed in the feeder block as a degassing means.

[0003]

However, if a vent hole is formed in the feeder block, a coating agent or a feeder may enter the vent hole to cause clogging. However, since this operation is to remove the clogging generated in the small hole, it takes a lot of trouble.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mold apparatus having a degassing means and a feeder block for easily removing a coating agent and a feeder that have adhered after release.

[0005]

In order to achieve this object, a mold apparatus according to the present invention is characterized in that a feeder block is disposed above a feeder space. Is divided into a plurality of pieces.

The gas vent slit is preferably a vertical slit, and it is effective if the planar shape is non-linear (this also applies to a case where a part includes a straight line or a broken line).

[0007]

The gas in the mold is released into the atmosphere from the vent slit. The feeder block can be separated into a plurality.

If the gas vent slit is a vertical slit,
The feeder that has entered the slit will protrude in the release direction. In this case, if the plane shape of the gas vent slit is non-linear, the slit forming surface does not adhere to the entire surface when the feeder block thermally expands, and the gas vent slit should be sufficiently long. Can be.

[0009]

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

FIG. 1 is a sectional view of a mold apparatus according to the present invention.

A cavity 7 is formed between the upper mold 1 and the lower mold 5 to which the conical center core 3 is fixed, and a feeder space 9 is formed around the center core 3 continuously with the cavity 7. It is configured. Above the feeder space 9, the feeder block 1 is fitted into a receiving hole 11 provided in the upper die 1.
The feeder block 13 is held by a holding plate 15.

Therefore, although the feeder space 9 is formed in a blind shape, the feeder block 13 is divided into three parts as shown in FIG.
Since gas venting vertical slits 17 are formed between 3b and 13c, gas in the riser space 9 and the cavity 7 passes through the gas venting vertical slits 17 at the time of pouring, and the presser plate 15 It is extruded into the atmosphere through a gap 19 between the upper mold 1 and the upper surface 1a.

The gas venting vertical slits 17, 17 are formed so as to draw a curve in the plan view of the feeder block 13, that is, to have a non-linear planar shape. Is expanded, the slit forming surface 13b 'of the split piece 13b, the slit forming face 13a' of the split piece 13a, and the slit forming face 13c 'of the split piece 13c are formed.
Are prevented from closely adhering to each other. The feeder enters the gas venting vertical slits 17, 17, but the projected direction of the entered feeder coincides with the mold release direction, so that it does not act as a mold release.

FIGS. 3 to 5 show a first embodiment of the feeder block.
FIGS. 4A and 4B are plan views showing a third modified example, and in the feeder block 131 of the first modified example shown in FIG. 3 and the feeder block 132 of the second modified example shown in FIG. The plane shapes of 17a and 17b are non-linear. On the other hand, in the feeder block 133 of the third modified example shown in FIG. 5, the vertical shape of the gas release vertical slit 17c is a straight line, and the gas release vertical slit 17c is sufficient to smoothly release gas. Since the feeder block is not provided with an appropriate length, the feeder block is further divided to form a gas vent slit 17d.

FIG. 6 is a plan view showing a fourth modification of the feeder block, and FIG. 7 is a sectional view of the fourth modification.

The feeder block 134 is formed by assembling block main bodies 23 equally divided into six parts around the block center 21 in the circumferential direction. Has become.

[0017]

As described above, in the mold apparatus of the present invention, since the feeder block is divided into a plurality, the feeder block is divided into a plurality and the coating mold adhered to the slit forming surface. The agent and the riser can be removed, so that the clogging of the gas vent slit can be easily removed.

If the gas vent slit is a vertical slit,
Since the feeder that has entered the slit projects in the release direction, the projecting portion of the feeder does not act as a stop for release. If the planar shape of the gas vent slit is made non-linear, there is no possibility that the gas vent slit is closed due to thermal expansion of the feeder block, and one gas vent slit can be formed sufficiently long. Even if the number of divisions of the feeder block is reduced, the gas in the mold can be smoothly released to the atmosphere.

[Brief description of the drawings]

FIG. 1 is a sectional view of a mold device according to the present invention.

FIG. 2 is an exploded perspective view of a feeder block.

FIG. 3 is a plan view showing a first modification of the feeder block.

FIG. 4 is a plan view showing a second modification of the feeder block.

FIG. 5 is a plan view showing a third modification of the feeder block.

FIG. 6 is a plan view showing a fourth modification of the feeder block.

FIG. 7 is a sectional view of a fourth modification.

[Explanation of symbols]

9 Feeder space 13, 131, 132, 133, 134 Feeder block 17, 17a, 17b, 17c, 17d, 17e Gas release vertical slit

Claims (3)

(57) [Claims] 1. A mold apparatus in which a feeder block is disposed above a feeder space, wherein the feeder block is divided into a plurality of parts so as to form a gas vent slit. Mold equipment. 2. The mold apparatus according to claim 1, wherein the gas vent slit is a vertical slit. 3. The mold apparatus according to claim 2, wherein the gas vent slit has a non-linear planar shape.