JPH0639522A - Method for casting cast product with hanger for pulling up - Google Patents

Abstract

PURPOSE:To simply cast a cast product having the configuration which can separate various kinds of the cast products from a sand mold by pulling up. CONSTITUTION:The sand mold 4 arranging two or more of risers 7, feeder heads or sprues reaching to the upper end surface of the sand mold in the suitable interval at the upper part of a cavity 5 for casting product is prepared and a part of hanger 10 for pulling up is inserted and set into the upper part of the riser 7, etc. Thereafter, molten metal is poured so as to insert the inserting part of the hanger 10 for pulling up, by which the molten metal rises in the riser 7, etc., through a sprue 6.

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 cast product with a lifting hook for pulling the cast product from a sand mold.

[0002]

2. Description of the Related Art Conventionally, in order to pull out a cast product from a sand mold, a hawk is pierced near the neck of a cast product in the sand mold such as a sprue, a lifter or a riser It is raised to engage with the sprue, lift, or riser for withdrawal. On the other hand, in recent years, some mass-production casting lines have begun to cast several kinds of products having different mounting positions such as a sprue, a lift or a riser. As described above, when casting several kinds of castings on one casting line, it becomes difficult to pierce the forks at different positions such as a sprue, a lifter, or a riser in the vicinity of the neck with a fork. Separation from the sand mold by pulling up the casting has become difficult.

However, the method of separating the cast product from the sand mold by pulling up the cast product is very important when the cast product is pulled out while it is held and then the cast product is positioned and transported for post-treatment. Therefore, it is desired to develop a method capable of separating the casting product from the sand mold by pulling up even when casting several kinds of casting products in one casting line. The present invention is made in view of the above, and an object of the present invention is to provide a method for casting a cast product having a structure in which various cast products can be separated from a sand mold by pulling out.

[0004]

[Means for Solving the Problem] The inventors of the present invention have found that various castings can be pulled out from a sand mold and separated as a measure.
To integrally pull up the lifting hook on the cast product at the top of the sand mold, hook the wire or chain on the lifting hook, and mechanically pull up the wire or chain. Therefore, it was found that even if some manual work is involved, it can be realized.

[0005]

The present invention is a method of casting a cast product with a pull-up handle, which enables the cast product to be separated from the sand mold by pulling out as described above, in which the upper end face of the sand mold is provided on the upper part of the cast product cavity. Prepare a sand mold with at least two lifts or feeders or sprues provided at appropriate intervals, and insert a part of the lifter for castings into the upper part of the lifts or feeders or sprues. After that, the molten metal is poured through the sprue until the molten metal is lifted or raised or the sprue is raised and the insertion portion of the pull-up lifting hand is cast and wrapped.

[0006]

According to the present invention, by adopting the above-mentioned structure, the wire or chain is hooked on the pulling-out lifting hand which is exposed and attached to the upper part of the sand mold, and the wire or chain is mechanically attached. By pulling it up, it becomes possible to pull out and separate from the sand mold corresponding to various cast products.

[0007]

【Example】

(Embodiment 1) A first embodiment will be described in detail with reference to FIGS. 1 and 2. A platen truck 2 is movably arranged on a rail 1 and is mounted on an upper portion of the platen truck 2. Is mounted with a horizontal sand mold 4 with a casting frame 3.3. A casting product cavity 5 is formed inside the sand casting mold 4, and a runner communicating with the sprue 6 is communicated with a position of the casting product cavity 5 on the mold matching surface. Further, at the upper end portion of the casting product cavity-5, two lifts 7.7 reaching the upper end of the sand mold 4 are formed at appropriate intervals.

In a state where the sand mold 4 with such a casting mold 3.3 is prepared (the above-mentioned constitution is the same constitution in the second and third embodiments), the upper part of each of the above-mentioned frying 7.7. Then, the link 8 is attached to the upper part thereof and the lower projecting piece 11 of the lifting and lowering hand 10 provided with the set seat 9 in the middle is inserted and set (see FIG. 1), and further the link 8 is attached to the upper part of the sand mold 4. ．
8 corresponding to the recess 12 and the through hole 13 communicating with the sprue 6
After mounting the weight 14 provided with the above, the molten metal is lifted from the casting hole cavity -5 by raising the molten metal from the sprue 6 and casting the lower projecting piece 11 into which the hanging hand 10 is inserted. Inject until wrapped. After that, the molten metal is solidified, and the lift 7 and the lifting lifter 10 are welded and integrated into the state shown in FIG. In order to pull out and separate the cast product from the sand mold 4, after removing the weight 14 in the state of FIG. 2, hook the wire on the link 8.8,
This is done by mechanically lifting the wire.

(Embodiment 2) A second embodiment is shown in FIGS.
The structure for preparing the sand mold 4 with the flask 3.3 is exactly the same as in the first embodiment. In this state, the projecting piece of the hoisting aid 10A in which the projecting piece 11A is attached to the lower part of the seat plate 9A having the lower surface as a set seat and the upper surface as a mounting seat in the upper part of the lifting and 7.7. 11A was inserted and set (see FIG. 3), and a weight 14A having a through hole 13A communicating with the sprue 6 was placed on the upper part of the sand mold 4, and then the molten metal was injected in the same manner as in Example 1. When the molten metal is solidified, the lift 7 and the lifting 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 to obtain the state of FIG. The casting is pulled out of the sand mold 4 and separated in the same manner as in the first embodiment.

(Embodiment 3) Third Embodiment FIGS. 6 and 7
In order to explain by this, this method is carried out for the sand mold 4 which does not require a weight, and the structure for preparing the sand mold 4 with the casting frame 3.3 is exactly the same as that of the first and second embodiments. Is. In this state, the hanger body 1 suspended and supported by the hand of the robot 15 on the upper part of the lifting 7.7.
Both lower ends of 6 are inserted and kept in that state (see FIG. 6), and molten metal is poured from the sprue until the molten metal is lifted and both lower ends of the hanger body 16 inserted in 7.7 are cast and wrapped. Hold until the molten metal solidifies. Molten metal solidifies and hanger body 1
When 6 and the lifting portion are integrated by welding, the hand of the robot 15 is pulled out and the state shown in FIG. 7 is obtained. The cast product is pulled out from 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 lift 7.7 is used to weld the hanger 10, the hanger aid 10A, and the hanger body 16, but a feeder or sprue may be used. . Further, although two of these lifting 7.7 are formed, three or four of them may be provided to stabilize the suspended state. Further, when hooking the wire on the hanger 10, the lifting aid 10A, and the hanger body 16, the wire may be chained.

[0012]

As is apparent from the above description, the present invention easily casts a cast product with a pull-up handle that can be separated by extracting from the sand mold even when the type of the cast product is changed. Since it is possible to do so, it is extremely advantageous for deciding the position for post-treatment of cast products and the effect of contributing to the construction of a casting plant is significant.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a casting process of Example 1 and showing a state before molten metal injection.

FIG. 2 is a vertical cross-sectional view showing a state where injection of the molten metal is completed.

FIG. 3 is a vertical cross-sectional view showing a casting process of Example 2 and showing a state before pouring molten metal.

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

FIG. 5 is a vertical cross-sectional view showing a state in which a link is welded to the lifting hand assisting tool.

FIG. 6 is a vertical cross-sectional view showing a state before injection of molten metal as shown in a casting process of Example 3.

FIG. 7 is a vertical cross-sectional view showing a state in which the robot hand has been removed from the state where the molten metal has been completely injected.

[Explanation of symbols]

 4 Sand Mold 5 Cavity Cavity 6 Gate 7 Lifting 10 Lifting Lifter 10A Lifting Lifter Aid 15 Robot 16 Hanger Body

Claims (4)

[Claims] 1. A sand mold provided with two or more lifts or risers reaching the upper end surface of a sand mold at the upper part of a cast product cavity at appropriate intervals, and the above-mentioned lifts or risers or At the upper part of the sprue, a part of the lifting hook of the cast product is inserted and arranged, and then the molten metal is lifted through the sprue or rises at the riser or the spout and the insertion part of the lifting hoist is inserted. A casting method for a cast product with a pull-up handle, which is characterized by pouring until casting. 2. The method for casting a cast product with a pull-up handle according to claim 1, wherein the pull-up suspension is an independent link-attached lifter. 3. The method for casting a cast product with a pull-up lift according to claim 1, wherein the pull-up lift is an independent individual link attachment seat. 4. The lifter according to claim 1, wherein the lifter is constructed as a single hanger, and both ends of the lifter are inserted into the upper part of the lifting or feeder or the sprue. Casting method for castings.