JP2933252B2 - Casting method for cast products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for casting a casting with a pulling handle for extracting the casting from a sand mold.

[0002]

2. Description of the Related Art Conventionally, to remove a casting from a sand mold, a fork is pierced into the vicinity of a neck of a casting in a sand mold, such as a gate, a fryer or a riser, and the fork is removed. It is raised and engaged with a gate, a fryer, or a riser to extract it. On the other hand, in recent years, even in a mass production casting line, several kinds of products having different mounting positions, such as a gate, a fryer or a riser, have been cast. Thus, when casting several types of castings in one casting line, it becomes difficult to pierce the forks in the vicinity of the neck, such as a gate, a fryer or a riser, at different positions, Separation from a sand mold by pulling out a casting is no longer performed.

[0003] However, the method of separating the casting from the sand mold by pulling it up is very difficult in the case where the casting is held and pulled out, and then it is positioned and transported for post-processing of the casting. In the case where several types of castings are cast in one casting line, it is desired to develop a method that can be adapted to a method in which the castings can be separated from the sand mold by pulling out. An object of the present invention is to provide a method for casting a casting having a structure which can be separated from a sand mold by pulling out various castings made in view of the above.

[0004]

[Means for Solving the Problem] The present inventors have developed a method for removing various kinds of castings from a sand mold and separating them.
Welding of the lifting hanger to the casting at the top of the sand mold, hooking a wire or chain to the lifting hanger, and mechanically pulling up the wire or chain. Has been found to be feasible even if some manual work is involved.

[0005]

According to the present invention, there is provided a method for casting a cast product with a lifting handle, which enables the casting to be separated from the sand mold by pulling as described above. Prepare a sand mold provided with two or more reaching or riser or sprue to reach at an appropriate interval, and insert and arrange a part of the lifting handle of the casting in the upper part of the fry or riser or sprue. Thereafter, the molten metal is poured through a sprue until the molten metal rises, rises or rises in the sprue, and is injected until the insertion portion of the pull-out hanger is cast-in.

[0006]

According to the present invention, a wire or a chain is hooked on a pulling hanger exposed and attached to an upper portion of a sand mold by adopting the above-mentioned structure, and the wire or the chain is mechanically attached. By pulling it up, it becomes possible to pull out and separate it from the sand mold corresponding to various castings.

[0007]

【Example】

(Embodiment 1) The first embodiment will be described in more detail with reference to FIGS. 1 and 2. A rail platform 2 is movably disposed on a rail 1, and is mounted on the upper surface of the platform platform 2. In the figure, a horizontal split sand mold 4 with a casting frame 3.3 is placed. A casting cavity 5 is formed inside the sand mold 4, and a runner leading to the gate 6 is communicated with the position of the mating surface of the casting cavity 5. At the upper end of the casting cavity 5, two lifts 7.7 reaching the upper end of the sand mold 4 are formed at appropriate intervals.

[0008] In the state where such a sand mold 4 with the casting frame 3.3 is prepared (the above configuration is the same in the second and third embodiments), the upper part of each of the flies 7.7. At the top, a link 8 is attached, and a lower protruding piece 11 of a lifting hook 10 provided with a set seat 9 in the middle is inserted and set (see FIG. 1). .
8 and through hole 13 communicating with gate 6
After placing the weight 14 provided with the hole, the molten metal is lifted from the gate 6 and lifted up from the casting cavity 5 to rise 7.7 to cast the lower protruding piece 11 into which the lifting hand 10 is inserted. Inject until wrapped. Thereafter, the molten metal solidifies and the lift 7 and the lifting hanger 10 are welded and integrated to obtain the state shown in FIG. In order to remove the casting from the sand mold 4 and separate it, the weight 14 is removed in the state of FIG.
This is done by mechanically lifting the wire.

(Embodiment 2) FIGS. 3 to 5 show a second embodiment.
The configuration for preparing the sand mold 4 with the flask 3.3 is exactly the same as in the first embodiment. In this state, the lifting part of the lifting hand assisting tool 10A has the upper part of 7.7, the lower part of which is a set seat and the lower part of a seat plate 9A whose upper surface is a mounting seat, and a lower part of a seat plate 11A. 11A is inserted and set (see FIG. 3), and a weight 14A provided with a through hole 13A communicating with the gate 6 is placed on the upper part of the sand mold 4, and then the molten metal is injected in the same manner as in Example 1. Then, the molten metal solidifies and the lift 7 and the lifting aid 10A are welded and integrated into the state shown in FIG. Next, after removing the weight 14A, the link 8A is attached to the upper surface of the seat plate 9A by means such as welding, and the state shown in FIG. 5 is obtained. The casting is separated from the sand mold 4 and separated as in the first embodiment.

(Embodiment 3) FIGS. 6 and 7 show a third embodiment.
According to this method, this method is performed on a sand mold 4 that does not require a weight, and the configuration for preparing the sand mold 4 with the casting frame 3.3 is exactly the same as in the first and second embodiments. It is. In this state, a hanger body 1 suspended and supported by the hand of the robot 15 above the lift 7.7.
6, the lower end of the hanger body 16 is inserted from the gate and the molten metal is poured from the gate until the lower end of the hanger body 16 inserted into the 7.7 is cast. Hold until the melt solidifies. The molten metal solidifies and the hanger body 1
When the lifting part 6 and the lifting part are welded and integrated, the hand of the robot 15 is extracted and the state shown in FIG. 7 is obtained. The cast product is pulled out of the sand mold 4 and separated by hooking a wire on the hanger body 16 and mechanically pulling up the wire.

In the above embodiment, the hoist 10, the hoist 10A, and the hanger body 16 are welded by using the lift 7.7, but a riser or a sprue may be used. . Further, although two lifts 7.7 are formed, three or four lifts 7.7 may be provided to stabilize the suspended state. Further, the hooking of the wire to the lifting hand 10, the lifting aid 10A, and the hanger body 16 may be performed by chaining the wire.

[0012]

As is clear from the above description, the present invention easily casts a cast product with a pull-up handle that can be separated by extracting from a sand mold even when the type of the cast product is changed. This is extremely advantageous for determining the position for post-processing of a cast product, and the effect of contributing to the construction of a casting plant is remarkable.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a casting step of Example 1 and showing a state before a molten metal is poured.

FIG. 2 is a longitudinal sectional view showing a state in which the injection of the molten metal is completed.

FIG. 3 is a longitudinal sectional view showing a state before casting a molten metal, showing a casting step of Example 2.

FIG. 4 is a vertical cross-sectional view showing a state where the injection of the molten metal is completed.

FIG. 5 is a longitudinal sectional view showing a state in which a link is welded to the hanger assisting device.

FIG. 6 is a longitudinal sectional view showing a state before casting a molten metal in a casting step of Example 3;

FIG. 7 is a vertical cross-sectional view showing a state in which the hand of the robot is removed from a state where the injection of the molten metal is completed.

[Explanation of symbols]

 4 Sand mold 5 Casting cavity 6 Gate 7 Lifting 10 Lifting hand 10A Lifting hand assisting device 15 Robot 16 Hanger body

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B22D 19/00 B22D 29/04

Claims (4)

(57) [Claims] 1. A sand mold is provided above the casting cavity, in which two or more fry or risers or gates reaching the upper end surface of the sand mold are provided at appropriate intervals. At the top of the sprue, a part of the lift of the cast product is inserted and arranged, and then the molten metal is raised through the sprue or rises or rises up the sprue, and the insertion part of the pulling hanger is inserted. A casting method of a cast product with a pull-out handle, characterized by injecting until casting. 2. The method for casting a cast product with a pull-up hanger according to claim 1, wherein the pull-up hanger is an independent hanger with a link. 3. The method according to claim 1, wherein the lifting hooks are independent link mounting seats. 4. A lifting hanger according to claim 1, wherein said lifting hanger is formed as a single hanger, and both ends thereof are inserted into the upper part of said fryer, riser or gate. Casting method for castings.