JPS5848269B2 - Casting machine for light alloy castings - Google Patents

Description

[Detailed Description of the Invention] A casting machine for casting light alloys such as aluminum alloys consists of an upper mold and a lower mold, and hot water is poured between the upper mold and the lower mold to perform casting. After casting. The upper and lower molds are separated and the cast product is taken out.

However, if the shape of the cast product is bilaterally symmetrical, an average force is applied to all the upper and lower molds when the upper and lower molds are separated, so the mold separation is good. If the mold is a cast product, an average force is not applied to the entire upper and lower molds, so it is very difficult to release the mold, which has the disadvantage of reducing work efficiency.

Furthermore, even if the mold release is poor, the casting machine may be damaged because it is forcibly removed, making it impossible to use it for a long time.

The present invention relates to a casting machine for light alloy castings that solves the above-mentioned drawbacks, and the construction thereof will be described in detail with reference to the accompanying drawings as follows.

A lower mold 1 and an upper mold 2 are provided so as to be able to come into contact with each other freely, and the lower mold 1 and the upper mold 2
In a casting machine that casts a cast product 3 by injecting hot water into a casting gap formed between the lower mold 1 and the upper mold 2, a lower mold base part 1a and an upper mold base part 2a are formed in the lower mold 1 and the upper mold 2. A fixing table 4 is provided horizontally between the lower mold table part 1a and the upper mold table part 2a, and the lower mold table part 1 is installed at several places around the lower mold table part 1a and the upper mold table part 2a.
Prying devices a and b are provided to pry open the space between a and the fixing base 4 and between the upper mold part 2a and the fixing base 4.

The prying devices a and b in the drawing have the same structure, and the lower mold 1
Supports 6 and 7 are provided upwardly projecting at three locations on the lower cylinder mounting base 5 provided below, and an eccentric plate 10 for the lower mold with a prying claw 8 is attached to the tip of one of the supports 6 using a shaft 12. death,
An upper mold eccentric plate 11 with a prying claw 9 is pivotally attached to the tip of the other support 7 by a shaft 13, and between the lower mold base part 1a and the fixed base 4, and between the upper mold base part 2a and the fixed base. 4, forming pry opening gaps 14 and 15 into which the prying claws 8 of the lower mold eccentric plate 10 and the prying claws 9 of the upper mold eccentric plate 11 fit,
The eccentric plates 10, 11 and the rod 17 of the lower cylinder 16 that supports the lower mold 1 are connected by connecting rods 18, 19, and when the rod 17 of the lower cylinder 16 is lowered, the eccentric plate 10 for the lower mold and the eccentric plate for the upper mold are connected. Rotate the plate 11 and press the opening claw 8,
9 shows the case where the pry gap 14.15 is pried open.

In the figure, 20 is a support connected to the lower die 1, and 21 is a connecting rod 18.
, 19 is a mounting cylinder with one end thereof pivoted, 22 is an upper cylinder mounting base provided above the upper die 2, 23 is an upper cylinder, 24 is a rod, 25 is an elevator rod provided at the tip of the rod 24, 26, 27, 28, and 29 are axes.

Since the present invention is constructed as described above, when the lower cylinder 16 is operated and the rod 17 is lowered in a state where the upper mold 2 and lower mold 1 shown in FIG. 1 are fitted together after casting, the connecting rod 18
, 19 are pulled, and the lower mold eccentric plate 10 and the upper mold eccentric plate 11 rotate and shift, so the prying claws 8 and 9 separate the parts between the lower mold base 1a and the fixed base 4 and the upper mold. The space between the base portion 2a and the fixed base 4 will be forced open, and the upper mold 2 and lower mold 1 will be easily separated as shown in FIG.

In this case, since the eccentric plate 10 for the lower mold and the eccentric plate 11 for the upper mold are provided at several places around the mold, it is necessary to strain the mold evenly.
Separation between the upper mold 2 and the lower mold 1 becomes extremely good.

After the upper mold 2 and the lower mold 1 are forced apart in this way, the cast product 3 can be taken out by lifting the upper mold 2 and completely separating it from the lower mold 1.

As described above, the present invention is not a method of separating the upper mold 2 and the lower mold 1 immediately after casting to take out the cast product 3, but by first prying the upper mold 2 and the lower mold 1 apart using the prying devices a and b. Since the method involves separating the upper mold 2 and the lower mold 1 completely after separating them a little, even if the cast product 3 is not bilaterally symmetrical or has a complex shape, there is no need to impose an unreasonable load on the machine. The upper die 2 and the lower die 1 can be separated without any problem, and therefore, the machine exhibits excellent features such as improving work efficiency and making it possible to use the machine for a long time without damaging it.

[Brief explanation of drawings]

1 and 2 are front sectional views showing the operation of this machine, and FIG. 3 is a plan view of the main parts. 1...Lower mold, 1a...Lower mold base, 2.
...Upper mold, 2a...Upper mold base, 3...
...Casting product, 4...Fixed stand, 5...
Lower cylinder mounting base, 6, 7... Prop, 8,
9...Prying claw, 10, 11...Eccentric plate, 14,15...Prying gap, 16.
...Lower cylinder 17... Rod,
18, 19...Connecting rod, 21...Mounting tube.

Claims (1)

[Claims] 1 In a casting machine in which a lower mold 1 and an upper mold 2 are provided so as to be able to come into contact with each other, and a cast product 3 is cast by pouring hot water into a casting gap formed between the lower mold 1 and the upper mold 2, the lower mold A lower mold base part 1a and an upper mold base part 2a are formed to protrude horizontally from the lower part of the mold 1 and the lower part of the upper mold 2, and the fixing base 4 is placed in a horizontal state between the lower mold base part 1a and the upper mold base part 2a. The lower cylinder mounting base 5 is positioned below the lower mold 1, and the rod 17 of the lower cylinder 16 provided at the center of the lower cylinder mounting base 5 is located directly below the lower mold 1. Supports 6 and 7 are provided vertically protruding at several locations around the lower cylinder mounting base 5 with center point 17, and an eccentric plate 10 for the lower die with a prying claw 8 is mounted eccentrically at the tip of one of the supports 6. The upper die eccentric plate 11 with the prying claw 9 is eccentrically attached to the tip of the other support 7, and the lower die eccentric plate 10, the upper die eccentric plate 11 and the rod 17 are attached. Pry opening gaps 14 and 1 are connected to the cylinder 21 by connecting rods 18 and 19, and into which the prying claws 8 and 9 of the lower mold eccentric plate 10 and the upper mold eccentric plate 11 are fitted.
5 is formed between the lower mold table part 1a and the fixed table 4 and between the upper mold table part 2a and the fixed table 4, and by rotating the eccentric plates io and 1i, the lower mold 1 and the upper mold 2 A casting machine for light alloy castings, characterized in that the and is separated from the fixed table 4.