KR101518411B1

KR101518411B1 - Die casting mold having high density compressed filling up structure

Info

Publication number: KR101518411B1
Application number: KR1020140031273A
Authority: KR
Inventors: 이권열
Original assignee: 이권열
Priority date: 2014-03-17
Filing date: 2014-03-17
Publication date: 2015-05-07

Abstract

The present invention relates to a die casting mold apparatus having a high-density compression-packed structure, and more particularly, to a die casting mold apparatus having a high- To a die casting mold apparatus having a high-density compression-packed structure in which stable filling of a molten metal is performed to secure an improved quality stability of a molded die-casting product through the mold,
According to the present invention, there is provided a mold comprising: a mold part having a molding space formed between a stationary mold and a movable mold; And a molten metal pump for forcibly filling the molten metal dissolved in the molten metal through a supply gate formed in the metal mold part,
Wherein the mold section is provided with a filling section forming section for dividing and expanding a filling section in which the molding space in which the molten metal is filled by the molten metal filling step is divided stepwise by stepping back the partition plate provided in the molding space, And the molten metal is compressed and filled in a filling section which is gradually expanded by a filling section forming section for stepwise retreating the elevating partition plate so as to fill the molding space with a high density molten metal by compression filling .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a die casting mold apparatus having a high-

The present invention relates to a die casting mold apparatus having a high-density compression and filling structure, and more particularly, to a die casting mold apparatus having a high- To a die-casting mold apparatus having a high-density compression-molding structure for ensuring an improved quality stability of a molded article through the molding die.

The die casting apparatus, which is one of the representative casting methods, is capable of closely connecting or separating the movable mold by a predetermined operating device in a fixed mold, and is capable of casting a molded product on the opposing surfaces of the fixed mold and the movable mold. A molding space is formed.

In the movable mold and the stationary mold, a supply gate is formed to supply molten metal to the molding space, and a movable gate is provided with a nozzle for discharging molten metal by operation of a molten metal pump installed in the molten metal furnace.

Therefore, the molten metal melted in the molten metal by the molten metal pump is filled into the molding space formed between the stationary mold and the movable mold via the nozzle through the gate.

When the molten metal is filled in the molding space of the fixed mold and the movable mold, the fixed mold and the movable mold are cooled by the cooling device and the movable mold is separated from the stationary mold to discharge the molded product in the molding space.

However, in the conventional die casting mold apparatus, since the molten metal is gradually filled in the closed forming space formed in the mold section, hardening of the molten metal inevitably occurs in the filling process.

Particularly, in the conventional die casting apparatus, the molten metal filled through the gate is naturally flowed along the inner wall of the molding space so that the molten metal stably reaches each part of the molding space of the mold part having a large degree of curvature such as a heat sink , The filling time of the molten metal is delayed, the productivity is lowered, the molten metal is hardened during the filling process, and the high incidence of defects is pointed out, and it is difficult to have a uniform density.

Further, it has been pointed out that the air remaining in the molding space is mixed with the molten metal and hardened, and a large amount of bubbles remain in the molded product through this.

When air bubbles are generated in the molded product as described above, dimensional accuracy of the molded product is hardly maintained and the strength is weakened, and it is difficult to have a beautiful appearance due to bubbles exposed on the surface.

(Patent Document 1) KR10-0558361 B1

(Patent Document 2) KR10-2012-0006161 A

(Patent Document 3) KR10-1188450 B1

It is an object of the present invention, which is devised to solve the above-described problems, to provide a method of manufacturing a metal mold, which comprises filling molten metal through a gate in a molding space formed between a movable mold and a stationary mold, And to provide a die casting mold apparatus having a high-density compression-packed structure for ensuring an improved quality stability of a molded product through the molding die.

The above object is achieved by the following constitutions provided in the present invention.

A die casting mold apparatus having a high-density compression-packed structure according to the present invention,

A mold part having a molding space formed between the stationary mold and the movable mold;

And a molten metal pump for forcibly filling the molten metal dissolved in the molten metal through a supply gate formed in the metal mold part,

Wherein the mold section is provided with a filling section forming section for dividing the forming space in which the molten metal is filled by the molten metal filling section step by step,

The molten metal filling section repeatedly performs a process of compressing and filling the molten metal in a filling section which is expanded stepwise by a filling section forming section for stepwise retreating the elevating partition plate so that a high density molten metal Is filled.

Preferably, the partition plate of the filling section forming section, which is stepwise retreated to gradually expand the molding space in a stepwise manner, is instantaneously compressed to instantaneously compress the surface of the preliminarily molded article made of the molten metal hardened in the molding space, Calibration, and tissue density.

More preferably, the mold portion is provided with a vacuum suction portion for vacuum suction of the air remaining in the molding space, so that the air remaining in the molding space is primarily discharged to prevent the oxidation of the molten metal by the air, Thereby preventing air from being mixed in the air.

As described above, the present invention proposes a die casting mold apparatus in which a filling section forming section for dividing and expanding the forming space of the mold section is formed, and the filling section expanding process and the high density filling process are alternately repeated.

Therefore, the molten metal compressed at a high density is filled in the molding space by the repetitive high-density filling process, and the molded article is cooled to have a high density while remarkably reducing residual bubbles.

Since the molten metal filling unit charges the molten metal at a high pressure within the filling zone defined by the filling zone forming unit, the molten metal filling the molten metal at high density in the molding space is prevented from being overloaded, It is possible.

Further, in the present invention, the partition plate of the filling section forming section is re-advanced into the molding space to instantaneously compress preformed preformed articles in the molding space. By this instant compression, the preformed articles have high density and precise shape .

1 is a diagram showing the overall configuration of a die casting mold apparatus having a high-density compression-packed structure proposed as a preferred embodiment of the present invention,
FIGS. 2 to 5 illustrate a filling process of a molten metal through a die casting mold apparatus having a high-density compression-packed structure, which is a preferred embodiment of the present invention,
FIG. 6 is an enlarged view of the 'A' portion of FIG. 3B and the 'B' portion of FIG. 4B.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a die casting mold apparatus having a high-density compression-packed structure proposed as a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing the entire construction of a die casting mold apparatus having a high-density compression-packed structure proposed as a preferred embodiment of the present invention, and FIGS. 2 to 5 show a high-density compression packing structure proposed in the preferred embodiment of the present invention FIG. 6 is an enlarged view of the 'A' portion of FIG. 3B and the 'B' portion of FIG. 4B.

The die casting mold apparatus 1 according to the present invention includes a mold section 10 having a molding space 10a formed between a stationary die 11 and a movable die 12 as shown in Fig. And a molten metal filling portion (20) including a molten metal pump (21) for forcibly filling molten metal (M) dissolved in molten metal through a supply gate (13) formed in the metal mold portion (10).

(Not shown) for heating the molten metal and a cooling structure (not shown) for cooling the molten metal are formed in the mold part 10 and a molten metal pump 21 A predetermined amount of molten metal M is introduced into the housing 21a and then the piston 21b is advanced at a high speed to transfer the molten metal M introduced into the housing 21a to the mold portion 10 Through the supply gate 13 of the semiconductor device.

The die casting mold apparatus 1 configured as described above is constituted such that the molten metal M melted in the molten metal furnace is basically filled in the molding space 10a of the closed mold section 10 so that the internal shape of the molding space 10a The molded product having the same shape as the molded product is molded.

The mold part 10 is provided with a vacuum suction part 30 for vacuum suction of the air remaining in the molding space 10a so that the air remaining in the molding space 10a is primarily discharged, Preventing the oxidation of the metal (M) while preventing the introduction of air into the molten metal (M).

3 to 4, when the vacuum suction unit 30 enters and sucks in air into the molding space 10a formed in the mold unit 10 as shown in FIG. 2, the molten metal filling unit 20, The molten metal M melted in the molten metal furnace is forcibly filled in the molding space 10a of the vacuum or reduced-pressure mold 10 through the pump 21 so that the molten metal M having the same shape as the inner shape of the molding space 10a .

In the present invention, when the molten metal (M) is forcibly filled in the molding space (10a) of the mold part (10) and the molten metal is cooled, the molten metal The molten metal filling portion 20 is provided in the filling section 10a-a formed by the filling section forming section 40 so as to form the filling section forming section 40 for gradually expanding the molten metal 10a M) are compression-packed so that the molten metal is compressed and filled in the molding space 10a at a high density by the stepwise compression filling of the molten metal (M).

The filling section forming section 40 has a dividing section 41 for dividing the filling section 10a-a which ascends step by step in the forming space 10a and communicates with the supply gate 13 in the forming space, In this embodiment, a partition plate 41 is provided for ascending and descending by the movable cylinder 42.

Therefore, the molten metal filling section 20 compresses and charges the molten metal M into the filling section 10a-a, which is expanded stepwise by the filling section forming section 40 for gradually raising the partition plate 41 The process is repeated to fill the molten metal which is compressed at a high density by compression filling in the molding space.

2, the vacuum suction unit 30 primarily discharges the air remaining in the molding space 10a of the mold unit 10 to prevent oxidation of the molten metal by the air, Thereby preventing air from being mixed into the metal.

The partition plate of the filling zone forming unit then enters the closed molding space 10a to partition the molding space 10a and divides the filling zone 10a-a communicating with the supply gate 13, And the molten metal filling section 20 charges the molten metal M at a high pressure into the filling section 10a-a formed by the partition plate 41 as shown in FIG. 3B.

4a, the filling section 10a-a is expanded by a unit, and the molten metal filling section 20 is expanded by a unit of the partition plate 41 as shown in FIG. 4b, The molten metal M is filled at a high pressure into the extended filling section 10a.

Through the unit expansion of the filling section 10a-a by the filling section forming section 40 and the high pressure filling of the molten metal by the molten metal filling section 20, the molding space 10a is filled with the high- Thereby forming a state in which the molten metal M compressed at a high density is filled.

Accordingly, the molten metal compressed at a high density as shown in FIG. 6 is filled in the molding space through a filling section expanding process and a high density compression filling process, which are alternately implemented by a filling section forming portion and a molten metal filling portion, The residual amount of bubbles in the molded article is remarkably reduced and a dense and uniform texture state is formed.

In this embodiment, the partition plate of the filling zone forming unit, which is stepwise retreated to gradually expand the molding space in a stepwise manner, is instantaneously lowered as shown in FIG. 5, so that the moment of pre- Compression is planned.

Therefore, the preliminarily molded preformed article in the molding space has a dense tissue density together with the shape correction by the hot pressing process performed by the partition plate 41 of the filling section forming section 40. [

Thus, in the die casting mold apparatus according to the present invention, it is possible to mold a die-casting molded article having a regular shape and a dense texture density by a compression molding process of a molten metal which is performed step by step and a hot-pressing process of preformed pre- .

1. Die casting mold device
10. Mold section 10a. Molding space
11. Fixed type 12. Movable type
13. Supply gate
20. Molten metal filling part 21. Molten metal pump
30. Vacuum suction part 31. Vacuum pump
40. Filling section forming part 41. Partition plate
42. Cylinder

Claims

A mold part having a molding space formed between the stationary mold and the movable mold;
And a molten metal pump for forcibly filling the molten metal dissolved in the molten metal through a supply gate formed in the metal mold part,
Wherein the mold section is provided with a filling section forming section for dividing and expanding a filling section that divides the forming space in which the molten metal is filled by the molten metal filling section by stepping back the partition plate provided in the forming space,
The molten metal filling section repeatedly performs a process of compressing and filling the molten metal in a filling section which is expanded stepwise by a filling section forming section for stepwise retreating the elevating partition plate so that a high density molten metal To be filled,
The partition plate of the filling zone forming unit, which is stepwise retreated to gradually expand the molding space in a stepwise manner, gradually compresses the surface of the preliminary molded product made of the molten metal hardened in the molding space to adjust the shape of the preliminary molded product, The die-casting mold apparatus having a high-density compression-packed structure.

delete

The vacuum degassing apparatus according to claim 1, wherein the mold portion is provided with a vacuum suction portion for vacuum suction of the air remaining in the molding space, so that the air remaining in the molding space is primarily discharged to prevent oxidation of the molten metal by air, Wherein the metal mold is configured to prevent air from being mixed into the metal.