KR20150101253A - Casting molding apparatus for manufacturing flange and method thereof - Google Patents

Abstract

The present invention discloses a casting mold apparatus to manufacture a flange and a method thereof, and the casting mold apparatus comprises: a lower press; a lower die installed in the lower press, having a concave portion to form a casting; an upper die which has a pressing protruding portion corresponding to the concave portion on a face opposite to the lower die, and has one or more vertical through-holes on a position wherein the pressing protruding portion is formed; a puncher installed to enter and come out of the through-hole; a jig installed in an upper portion of the upper die supporting the puncher; an upper press which supports the upper die on the upper portion of the upper die while accommodating the jig; a press module which raises and lowers the upper press; and a punching machine installed in the press module, is axially coupled to the jig through the upper press, and performs an operation for punching wherein a casting material is inputted to the concave portion of the lower die, then the upper press is lowered by operating the press module, the pressing protruding portion of the upper die is lower to a position of the concave portion of the lower die, and then a protruding portion of the casting material formed in the through-hole is punched by the puncher by operating the punching machine.

Description

[0001] CASTING MOLDING APPARATUS FOR MANUFACTURING FLANGE AND METHOD THEREOF [0002]

The present invention relates to a casting mold apparatus and method for manufacturing a flange, and more particularly, to a casting mold apparatus and method for manufacturing a flange using the same, Casting mold apparatus and method thereof.

In general, casting refers to a process in which a metal is injected into a metal mold and solidified to form a predetermined shape, and a product molded through such a process is referred to as a cast metal. This casting technology is the most fundamental of the metal processing technology and plays an important role in the development of the metal industry.

The casting technology, which is one of the metal material processing techniques described above, can be used for flange production and the like. In the case of the flange, 70 to 80% of the total casting production amount is used in the ship, plant industry, and machinery equipment industry.

Die Casting Products Die casting products are produced by casting method because of mass production, dimensional accuracy, homogeneity of material, demand for light weight, complex shape, fatigue strength, heat resistance and abrasion resistance. At this time, an aluminum alloy (Aluminum alloy) in which a special element (Cu, Si, Mg, Ni, etc.) alone or in combination is added to aluminum as a main component is used for the die casting alloy.

Aluminum alloys as described above have improved strength, heat resistance and resistance to various kinds of additive elements in addition to good plastic workability, high electrical and thermal conductivity, and beautiful properties, and nowadays have a wide range of uses following steel. In particular, among aluminum alloys, Al-Si, Al-Si-Mg, Al-Mg and Al-Si-Cu alloys are used for die casting and pure aluminum is also used.

Meanwhile, in the conventional mold process, the upper and lower dies having shapes for forming castings on the upper and lower presses are respectively disposed, the casting material is put into the die, the upper and lower presses are operated, ≪ / RTI >

At this time, when the casting material is cooled in the molding process, shrinkage of the casting occurs, and bubbles may be generated on the surface and inside of the casting due to the shrinkage.

The above-mentioned bubbles have a serious effect on the yield of castings and various efforts have been made to solve them. An example of this is disclosed in Korean Patent Publication No. 10-2004-0028876.

In order to prevent this, there has been a process of replenishing the casting material, and a process of replenishing the casting material has been performed. When the casting has been completed, the casting material is supplemented to cut the inserted portion, And the like.

Therefore, the above-mentioned conventional casting mold method requires a complicated process and difficulty in manufacturing, which requires a casting material replenishment and a post-molding finishing process.

Further, in order to proceed with the above-described process, it is difficult to design a mold apparatus with a complicated structure.

In order to solve the above problems, the present invention provides a casting mold apparatus for manufacturing a flange for finishing the shape of a casting such as a flange by punching a raised portion formed in a through hole formed for forming a casting without supplementing the casting material, The purpose of this method is to provide.

A casting mold apparatus for manufacturing a flange according to the present invention comprises: a lower press; A lower die provided on the lower press and having a recess for forming a casting; An upper die having a pressing projection corresponding to the concave portion formed on a surface facing the lower die and having at least one vertical through hole at a position where the pressing projection is formed; A puncher installed in the through hole so as to be able to move in and out; A jig installed on the upper die to support the puncher; An upper press for receiving the jig and supporting the upper die at an upper portion of the upper die; A press module for moving up and down the upper press; And a punching machine installed in the press module and connected to the jig through the upper press to perform driving for punching, wherein after the casting material is charged into the recess of the lower die, The upper press is lowered to lower the pressing projection of the upper die to the concave portion of the lower die and then the ridge portion of the casting material formed in the through hole is punched by the punching machine by driving the punching machine .

Here, the punching machine can be moved up and down simultaneously with the press module.

The punching machine may be coupled to the press module.

Further, the lower die and the lower press further include a pin hole penetrating vertically, and a pin may be further formed to move up and down along the pin hole.

The pin may be driven to descend in order to allow the casting mold to move in conjunction with the lifting and lowering of the press module.

Further, an outgassing hole for outgassing may be further formed on the pin.

The punching of the puncher may be performed after a predetermined time elapses after the pressing projection of the upper die is lowered to the position of the recess of the lower die.

Further, the lowering speed for punching the puncher is set to be faster than the lowering speed of the press module, and the punching can be set to be performed more than once.

Further, a space or an outgassing hole may be further formed for at least one of outward gauging between the outer circumferential surface of the pressing projection of the upper die and the inner circumferential surface of the recess of the lower die, and at least one of the through-hole and the upper die.

According to the present invention, since it is not required to add a casting material in the casting forming process or to finish the casting after finishing the casting, The process can be simplified and the design and construction of the casting mold apparatus can be simplified. This can reduce labor and material costs and improve process speed and efficiency.

Further, according to the present invention, bubbles are not formed on the surface of the casting or the casting without supplementing the casting material, so that the yield of the casting can be improved.

1 is a sectional view showing a casting mold apparatus according to a preferred embodiment of the present invention;
2 is a cross-sectional view illustrating a state in which a casting material is put in an embodiment of the present invention.
3 is a cross-sectional view illustrating a state in which an upper die is lowered by a press module in an embodiment of the present invention.
FIG. 4 is a cross-sectional view illustrating that casting material raised in a through-hole during standby time is supplemented and decreased in accordance with cooling according to an embodiment of the present invention. FIG.
5 is a cross-sectional view illustrating a state in which punching is performed according to an embodiment of the present invention.
6 is a cross-sectional view illustrating a state in which an upper die is raised and lowered by a press module after forming a casting in an embodiment of the present invention.
7 is a cross-sectional view illustrating an outgassing hole formed for an outgassing in an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the terminology used herein is for the purpose of description and should not be interpreted as limiting the scope of the present invention.

The embodiments described in the present specification and the configurations shown in the drawings are preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention and thus various equivalents and modifications Can be.

An embodiment of the casting mold apparatus according to the present invention can be practiced as shown in FIG. 1, and an embodiment of the casting mold method can be performed as shown in FIGS. 2 to 6.

The embodiment according to the present invention is designed to prevent the formation of pores in the casting and to eliminate the necessity of a process of supplementing the casting material and a finishing process after the casting is completed.

Referring to FIG. 1, an embodiment according to the present invention includes a lower press 10 and a lower die 12 at a lower portion and an upper press 14, an upper die 16, a press module 26, (20), a jig (22), and a punching machine (28).

The lower die 12 is provided on the upper portion of the lower press 10 which maintains the fixed position of the lower structure and the lower die 12 is provided with recesses 13 are formed on the upper surface.

In the case of a part having a hole like a flange, a pin 18 for forming a hole is formed. At this time, the pin 18 passes through the lower press 10 and the lower die 12, Can be arranged to be disposed and can have a configuration that can be lowered for molten and molten casting after the process. At this time, the descent of the pin 18 can be realized by a hydraulic type or an electric type.

In the upper structure, the upper die 16 is provided with the pressing projection 17 corresponding to the concave portion 13 on the surface facing the lower die 12, and one The through holes 19 in the vertical direction are formed.

Here, the punch 20 is provided in the through-hole 19 so as to be able to move up and down. The upper end of the puncher 20 is positioned above the upper die 16 at a position spaced apart from the punch 20, And is supported by the jig (22) disposed on the base.

The jig 22 has a structure that is coupled with a punching machine 28 which is pivotally connected to the upper press 14 and the press module 26 to be described later.

The upper die 16 is coupled to the upper upper press 14 and the upper press 14 is configured to receive the upper die 16 while receiving the jig 22. [

On the upper side of the upper press 14, a press module 26 for moving up and down the upper press 14 is formed.

The press module 26 can lift or lower each step for performing the process for forming the casting. The press module 26 can move up and down by the press module 26, The upper die 16 supported thereon can move up and down together.

The punching machine 28 can be engaged with the press module 26 and performs a driving operation to instantaneously lower the puncher 20 installed in the jig 22 along the through hole 19 to perform punching, When coupled to the press module 26, can be carried by the press module 26 and can be lowered, and an operation for driving the puncher 20 at a timing in which punching is required can be performed.

Here, the press module 26 and the punching machine 28 are preferably hydraulically driven, and the punching machine 28 may be driven to punch the puncher 20 more than once. Here, more than once may mean several times, including two or three times.

According to the construction as described above, the embodiment according to the present invention can mold the casting by the process of FIG. 2 to FIG.

2, the lower die 12 and the upper die 16 are spaced apart from each other by a predetermined distance. In this state, the casting material 30 is supplied to the recess 13 .

Since the feed of the casting material 30 can be variously carried out by the manufacturer, detailed description thereof will be omitted.

At this time, it is preferable that the casting material 30 is sufficiently injected considering the volume to be shrunk by cooling during the molding process.

2, after the casting material 30 is put into the concave portion 13 of the lower die 12, the upper die 16 installed on the upper press 14 is lowered by driving the press module 26 do. At this time, it is preferable that the punching machine 28, the jig 22, and the puncher 20 are also carried on the upper press 14 without being driven.

3, the press module 26 lowers the upper press 14 and the upper die 16 to the position of the recessed portion 12 of the lower die 12 by the press projection 17 of the upper die 16.

When the end of the subsidiary projection 17 of the upper die 16 abuts on the recess 12 of the lower die 12 as described above, the amount of the marginal amount of the casting material 30 sufficiently charged in consideration of the volume contracted by cooling The protrusion 32 can be formed as shown in Fig.

The casting material 30 may be cooled and molded into a casting in a state in which the end of the joining projection 17 of the upper die 16 is in contact with the concave portion 12 of the lower die 12 as shown in Fig.

At this time, out-gassing occurs in the molding process of the casting, and the out-gassing is performed between the outer peripheral surface of the pressing projection 17 of the upper die 16 and the inner peripheral surface of the recess 13 of the lower die 12, , And through holes (19).

If outgassing is required according to the manufacturer's intention, outgassing holes 34 and 36 may be further formed in the upper die 16 or the pin 18 as shown in FIG. 7. At this time, the outgassing holes 34 and 36 ) May be formed in at least one region not in contact with the casting.

3, when the end of the pressing projection 17 of the upper die 16 is in contact with the recess 12 of the lower die 12 and the casting material 30 is cooled to form the casting Shrinkage of the casting due to cooling may occur.

At this time, the casting material forming the ridge portion 32 formed in the through-hole 19 may be exhausted to prevent the formation of pores due to contraction of the casting.

That is, the embodiment according to the present invention can be solved by the ridge portion 32 formed in the through hole 19 described above.

Accordingly, the height of the ridge portion 32 may be reduced by an amount that is exhausted by the shrinkage of the casting, as shown in FIG.

The molding of the casting can be performed as in the process of FIGS. 3 and 4. The punch 20 can be formed after a few seconds after the pressing projection 17 of the upper die 16 and the recessed portion 13 of the lower die 12 come into contact with each other, So that punching can be performed.

When the punching machine 28 drives the jig 22 coupled to the shaft, the punching machine 28 is operated in conjunction with the momentary lowering of the jig 22, Can be performed.

The lowering speed of the puncher 20 for punching may be set to be faster than the lowering speed of the upper die 16 by the press module 26, .

The pressure for punching the puncher 20 can be arbitrarily set by the manufacturer depending on the characteristics of the casting material 30. [

6, the upper die 16 installed on the upper press 14 is lifted and lowered by the driving of the press module 26. As a result, do. At this time, the punching machine 28, the jig 22, and the puncher 20 can be lifted and carried on the upper press 14 without being driven.

In addition, the pin 18, which can be raised and lowered by a pinhole vertically penetrating the lower die 12 and the lower press 10, in conjunction with the lifting and lowering of the upper press module 26 after the punching, do.

By the lowering of the pin 18, it is possible to form a hole of a casting like a flange.

After the elevating and lowering of the upper press module 26 and the lowering of the fin 18 of FIG. 6 are performed, the casting is extracted from the lower die 12, thereby completing the molding process of the casting.

As described above, the present invention does not require a process for adding a casting material to a casting process, such as a conventional process, or a finishing process for cutting a burnt portion or removing a mark after a casting process is completed . Therefore, in contrast to the prior art, the present invention simplifies the process of manufacturing a casting such as a flange, thereby simplifying the design and construction of the casting mold apparatus.

In addition, the present invention can smoothly perform outgassing in a molding process of a casting such as a flange, and prevent formation of bubbles on the surface of the casting or casting without supplementing the casting material, thereby improving the yield of the casting.

10: Lower press 12: Lower die
13: lumbar part 14: upper press
16: upper die 17: pressing projection
18: pin 19: through hole
20: puncher 22: jig
26: Press module 28: Punching machine
30: Casting material 32: Ridge
34, 36: Outgas Singh

Claims (6)

Lower press;
A lower die provided on the lower press and having a recess for forming a casting;
An upper die having a pressing projection corresponding to the concave portion formed on a surface facing the lower die and having at least one vertical through hole at a position where the pressing projection is formed;
A puncher installed in the through hole so as to be able to move in and out;
A jig installed on the upper die to support the puncher;
An upper press for receiving the jig and supporting the upper die at an upper portion of the upper die;
A press module for moving up and down the upper press; And
And a punching machine installed in the press module and connected to the jig through the upper press to perform driving for punching,
Wherein the upper die is lowered by driving the press module after the casting material is inserted into the recessed portion of the lower die, the pressing projection of the upper die is lowered to the recessed portion of the lower die, A ridge portion of the cast material is punched by the punching machine by driving the punching machine,
Wherein the lower die and the lower press further comprise a pinhole vertically penetrating through the pinhole, and further comprises pins for moving up and down along the pinhole,
Wherein the pin is driven to descend in order to escape the casting formed in association with the lifting and lowering of the press module.
The method according to claim 1,
Wherein the punching machine is simultaneously moved up and down with the press module.
3. The method of claim 2,
Wherein the punching machine is coupled to the press module.
The method according to claim 1,
And an outgassing hole for outgassing is further formed on the fin.
The method according to claim 1,
Wherein a lowering speed for punching the puncher is set to be faster than a lowering speed of the press module, and the punching is set to be performed at least once.
The method according to claim 1,
Wherein a space or an outgassing hole for out gashing is further formed in at least one of a portion where the press projection of the upper die and an inlet of the recess of the lower die meet, and at least one of the through-hole and the upper die.

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