JPH0415407Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mold device for casting a plurality of castings in one shot.

(Prior Art) An example of a low-pressure casting mold apparatus for manufacturing a plurality of cast products in one shot is shown in FIG.

This conventional equipment is for casting two automotive cylinder units in one shot.
At the center of the machine base 101 of this device is a lower mold 102 having a pouring hole, and at the center of the lower mold 102 is a partition core 102a.
is listed.

An upper mold (not shown) facing the lower mold 102 is suspended above the lower mold 102 so as to be movable up and down. The horizontal molds 103 and 104 forming the side walls of the mold are mounted on the cylinder unit 1 provided on the machine base 101.
05, 106 for horizontal movement.

To operate the conventional device having the above configuration, first, the lower mold 101 is set in the center of the machine base 101, and then the cylinder units 105, 106 are operated to push out the horizontal molds 103, 104 as shown in FIG. form the outer wall of the mold.

Subsequently, the partition core 102a is inserted from above to partition the space, and required port cores and jacket cores (not shown) are placed in each room.

Next, an upper mold is placed from above and sealed to form two cavities.

Molten metal is poured into the cavity from the outside through the pouring port of the lower mold 102. After the hot water solidifies, the upper mold and horizontal mold 1
03 and 104 are removed in the opposite manner to the above to obtain a cast product.

(Problems to be solved by the invention) However, in the case of the above-mentioned conventional device,
The binder mixed in the partition core gasifies and mixes into the molten metal, a gap is created between the partition core and the horizontal type due to the difference in thermal expansion, and the partition core is significantly larger than the horizontal type. Because it is difficult to cool, there is a phenomenon in which the solidification rate of the molten metal near the partition core slows down.

These phenomena cause problems such as deterioration of casting quality, increase in deburring work, decrease in yield, and inability to shorten the casting cycle.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention eliminates the partition core and consists of a horizontal mold group consisting of an outer horizontal mold located on the outer periphery of the mold group and an inner horizontal mold other than that. I decided to do so.

(Function) As before, the outer horizontal type is moved forward and backward from the outside by a cylinder unit. On the other hand, the inner horizontal type is horizontally moved by a cylinder unit that is disposed parallel to the cylinder unit of the outer horizontal type that the horizontal type faces.

Therefore, the side wall of each mold of the present invention is formed by an outer horizontal mold and an inner horizontal mold assembled from all sides.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a plan view of a casting mold device according to the present invention, and FIG. 2 is a view taken along the line A--A in FIG.

The casting mold device 1 is for forming two molds, and in the center of the machine stand 2 there are replaceable lower molds 3,
4 is listed above.

The lower molds 3 and 4 are provided with pouring ports 3a and 4a for introducing the molten metal from below.

Above these lower molds 3, 4, upper molds 5, 6 are fixed and suspended from piston rods 5a, 6a which can move forward and backward. These piston rods 5a, 6a pass through an upper die machine stand 2a which is erected from the machine stand 2 and held stationary in the air. Also, the upper die machine stand 2
The lower surface of a has a needle-like ejector pin 2b...
..., 2c... penetrate through the upper molds 5, 6 and hang down.

On the other hand, the horizontal molds that come into contact with the lower mold 3 to form the side walls of the mold include four horizontal molds: outer horizontal molds 7, 8, 8 on the right side, upper and lower sides in FIG. 1, and inner horizontal molds 9 on the left side in the same figure. Each horizontal type is equipped with a cylinder unit.

10 is a cylinder unit for the outer horizontal mold 7, and this cylinder unit 10 includes a piston rod 10a that extends vertically outward from the outer horizontal mold 7 and is fixed thereto, and a cylinder 10b that accommodates the piston rod 10a.
and a bracket 10c for fixing the cylinder 10b to the machine base 2.

Similarly, 11, 11 is a cylinder unit for the outer horizontal type 8, 8, and this cylinder unit 1
1 and 11 are piston rods 11a and 11a that extend vertically outward from the outer horizontal molds 8 and 8 and are fixed thereto.
and cylinders 11b and 11b that house this,
It is composed of brackets 11c, 11c that fix the cylinders 11b, 11b to the machine base.

By the action of these cylinder units 10 and 11, the outer horizontal molds 7 and 8 move horizontally, respectively, to assemble the mold.
Disassemble. In addition, 10d and 11d are guide rods, and these are attached to the sleeve 1 that is fixed to the bracket.
They are inserted into and slidably contacted with 0e and 11e, respectively, to prevent the outer horizontal molds 7 and 8 from tilting during movement.

12 is a cylinder unit for the inner horizontal type 9. The inner horizontal mold 9 has an end extending in the vertical direction in FIG. 1 to form horizontal end portions 9a, 9a, and as a result, the inner horizontal mold 9 is longer than the opposing outer horizontal mold 7.

The cylinder unit 12 has a different structure from the cylinder units 10 and 11 described above.

That is, the ends 9a, 9a of the inner horizontal mold 9 are provided with connecting rods 12a, 12a, 12 spaced apart in the height direction.
a, 12a are erected so as to extend to the right in the drawing, and the other ends of these connecting rods 12a are fixed to a connecting plate 12b arranged parallel to the inner horizontal die 9. The ends of piston rods 12c, 12c extending to the right in the drawing are fixed to the connecting plate 12b.

The piston rods 12c, 12c are slidably fitted into cylinders 12e, 12e, which are held horizontally by brackets 12d, 12d, which stand up from the machine base 2.
Furthermore, the piston rods 12c, 12c belong to both rod-cylinder types, and the cylinder 12
The end 12 of the rod protrudes through e, 12e.
A connecting member 12g is spanned between f and 12f.

This connecting member 12g is a piston rod 12c,
12c, and prevents the inner horizontal die 9 from tilting during movement.

The connecting rods 12a, 1 spaced apart in the height direction
2a has an interval that does not prevent the outer horizontal molds 8, 8 from moving forward and backward.

Also, the piston rod 10a is attached to the connecting plate 12b.
and guide rods 10d, 10d are provided therethrough.

The configuration of the device shown in the right half of FIG. 1 has been described above, but the left half of FIG. 1 is symmetrical to this.

That is, in the figure, 57 and 58 are the outer horizontal molds corresponding to the outer horizontal molds 7 and 8, 59 is the inner horizontal mold corresponding to the inner horizontal mold 9, and 60, 61, and 62 are the cylinder unit 1.
These are cylinder units corresponding to numbers 0, 11, and 12.

The operation of this embodiment having the above configuration will be explained below.

The lower molds 3 and 4 are placed at predetermined positions on the machine base 2, and then the cylinder units 10, 11, 11, 60, 6
1, 61 to act on the outer horizontal type 7, 8, 8, 5
7, 58, 58 are pushed out and the cylinder units 12, 62 are activated to draw the inner horizontal molds 9, 59 together to form the side walls of the mold as shown in FIG.

Required port cores and jacket cores (not shown) are placed in these mold spaces S1 and S2 that open upward.

Next, as shown in FIG. 4, the upper piston rods 5a, 6a are actuated to lower the upper dies 5, 6, and the upper dies 5, 6 and complete the mold.

The pouring port 3a into the formed mold spaces S1 and S2,
Molten metal is injected and held through 4a.

After the molten metal solidifies, first, cylinder unit 1
0, 11, 11, 60, 61, 61 to pull the outer horizontal dies 7, 8, 8, 57, 58, 58, and at the same time act the cylinder units 12, 62 to push out the inner lateral dies 9, 59. Separate all horizontal molds from the casting.

Next, the upper piston rods 5a, 6a are activated to raise the upper molds 5, 6. At this time, the cast product adheres to the upper molds 5 and 6 and rises as one.

As this rises, ejector pin 2b...
..., 2c... come to protrude below the upper molds 5, 6, and the ejector pins 2b..., 2c...
. . . projects the cast product downward and separates the upper molds 5 and 6 from the cast product.

The cast product is received by a transfer mechanism (not shown) inserted below and transferred to the outside.

Incidentally, in the above embodiment, two cast products are obtained, but four molds can be formed in a square shape using the same configuration. That is, the side wall of one mold is formed by two outer horizontal molds and two inner horizontal molds, and the cylinder unit for the inner horizontal mold is arranged along the cylinder head for the outer horizontal mold.

In this way, a useful casting mold apparatus is created by arranging the inner horizontal cylinder unit in parallel with the outer horizontal cylinder unit which is arranged so as to surround the mold group.

(Effects of the invention) As explained above, according to the invention of the present application, the function of the partition core is replaced with the inner horizontal type which is almost the same as the outer horizontal type, so there is no need to worry about the generation of gas from the binder and the occurrence of burrs. It can also prevent Since the outside of the inner horizontal mold is sufficiently air-cooled, the solidification time of the molten metal is not prolonged.

Therefore, according to the present invention, high-quality cast products can be produced with high yield and in a short cycle.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the casting mold device according to the present invention, FIG. 2 is a view taken along the line A-A in FIG. 1, FIG. 3 is a diagram showing the operation of FIG. 1, and FIG. 3 is a view taken along the line B-B, FIG. 5 is a plan view of the device according to the conventional example, and FIG.
The figure is a diagram showing the effect of FIG. 5. In the drawings, 1 is a casting mold device, 3 and 4 are lower molds, 5 and 6 are upper molds, 7, 8, 57, and 58 are outer horizontal molds, 9 and 59 are inner horizontal molds, and 10, 11, and 12. ,6
0, 61, and 62 are cylinder units.

Claims (1)

[Scope of Claim for Utility Model Registration] A fixed lower mold having a pouring spout, an upper mold that can be raised and lowered with respect to the lower mold, and a horizontal mold group that can move horizontally forward and backward with respect to these upper and lower molds. In a mold apparatus that forms a plurality of mold groups, a cylinder unit for retracting and disassembling the molds is disposed outside each of the outer horizontal molds located on the outer periphery of the mold group, and the inner horizontal molds other than the outer horizontal mold The cylinder units move forward to disassemble the mold and are connected to each other, and the inner horizontal cylinder unit is arranged in parallel with the outer horizontal cylinder unit facing the inner horizontal cylinder unit. Casting mold equipment.