KR100535389B1 - Recirculation type cooling system of die casting - Google Patents

Abstract

The present invention relates to a circulating cooling system of a die casting mold that can improve the life of the center support insert by applying the circulating cooling system inside the center support insert to uniformly cool the inner surface of the center support insert. A center support insert for forming a cooling water circulation passage so as to be discharged; A fixed cooling ring coupled to the center support insert in a ring type and having a coolant inlet and outlet connected to a coolant circulation flow path formed in the center support insert; It is coupled to the cooling water inlet and outlet of the fixed cooling ring, respectively, and comprises a cooling water inlet and outlet pipe for introducing the cooling water into the center support insert and discharge the cooling water from the inside of the center support insert.

Description

Circulating cooling system of die casting mold {RECIRCULATION TYPE COOLING SYSTEM OF DIE CASTING}

The present invention relates to a circulating cooling system of a die casting mold.

In general, a vehicle die casting product is a casting method of producing a large amount of products having excellent casting surfaces with high precision by cooling a molten metal filled with high-temperature molten alloy at high speed and high pressure in a precise mold.

In particular, the spot type cooler 120 is used to cool the inside of the die casting mold, as shown in FIGS.

The spot cooler 120 is used for the production of automatic transmission case material, and by using the spot cooler 120 inside the mold, the die casting mold is cooled to solidify high temperature aluminum molten metal in a short time. Produce materials. On the other hand, Figure 2 is a cross-sectional view taken along the line AA in the automatic transmission case of Figure 1, wherein the blue arrow shows that the coolant is introduced through the coolant hole 110 (IN), the red arrow is the discharge ( OUT) is shown.

However, when the above method is used, the following problems exist in the past.

① Fixed center support shape is made of DIE integrated type, making it difficult to modify and repair the mold, and productivity is reduced due to excessive mold modification time.

2) The spot type cooler 120 was concentrated at the inlet of the molten metal, causing quenching due to uneven cooling of the mold, which caused a material defect.

That is, the shape of the portion with the cooling water is cooled quickly and the shape of the portion without the cooling water is relatively less cooled, causing quenching when the product is taken out, resulting in material defects.

③ As shown in FIG. 1, 11 places of coolant holes 110 having a diameter Φ 15 mm were disposed, and cracks were generated due to the thinness of the coolant holes 110.

④ Coolant leaked due to the occurrence of microcracks due to thermal fatigue (expansion, shrinkage) accumulation and shortened mold life.

SUMMARY OF THE INVENTION An object of the present invention is to provide a circulating cooling system of a die casting mold capable of improving the life of the center support insert by applying the circulating cooling system inside the center support insert to uniformly cool the inner surface of the center support insert.

In order to achieve the above object, the present invention provides a circulating cooling system of a die casting mold, comprising: a center support insert having a cooling water circulation passage formed therein to allow the cooling water to flow in and out; A fixed cooling ring coupled to the center support insert in a ring type and having a coolant inlet and outlet connected to a coolant circulation flow path formed in the center support insert; It is characterized in that it comprises a coolant inlet and outlet pipe coupled to each of the cooling water inlet and outlet of the fixed cooling ring to introduce the coolant into the center support insert and discharge the coolant from the inside of the center support insert.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

4 to 8, a configuration of a circulating cooling system of a die casting mold according to an embodiment of the present invention will be described.

4 illustrates a configuration of a circulating cooling system of a die casting mold according to an exemplary embodiment of the present invention, in which a fixed cooling ring 420 and a fixed cooling ring 420 are coupled to a center support insert 410. The coupling sequence of the coolant inlet and outlet pipes 432 and 430 coupled thereto is shown.

5 is a perspective view showing the configuration of the center support insert 410 according to an embodiment of the present invention, Figure 6 is a cross-sectional view along the line A-A of FIG.

FIG. 7 is a cross-sectional view taken along the line B-B of FIG. 5 showing the coolant flow direction.

FIG. 8 is a view illustrating a rear shape of the center support insert 410 illustrated in FIG. 5, which shows the coolant inflow and outflow directions and the coolant circulation flow path.

An embodiment of the present invention includes a center support insert 410, a fixed cooling ring 420, and coolant inlet and outlet pipes 432 and 430 in a circulating cooling system of a die casting mold.

The center support insert 410 is formed in a cylindrical shape having an inner space with one end closed and the other end opened as shown in FIGS. 4 and 5, and the coolant is introduced and discharged into the inner space as illustrated in FIG. 8. As described above, a cooling water circulation passage is formed.

The fixed cooling ring 420 is ring-type coupled to the center support insert 410 and has a coolant inlet 422 and a coolant outlet 424 connected to a coolant circulation passage formed in the center support insert 410.

The coolant feed pipes 432 and 430 are respectively coupled to the coolant inlet 422 and the coolant outlet 424 of the fixed cooling ring 420, and the coolant feed pipe 432 for introducing coolant into the center support insert 410. And a coolant discharge pipe 430 for discharging the coolant from the center support insert 410.

On the other hand, the embodiment of the present invention is configured by mounting the O-ring 440 on the outer peripheral surface of the fixed cooling ring (420).

The o-ring 440 prevents coolant from leaking between the inner circumferential surface of the center support insert 410 and the outer circumferential surface of the fixed cooling ring 420.

As described above, the embodiment of the present invention applies a ring type circulating cooling system to the center support insert 410 of the die casting mold.

4 to 8 will be described a cooling process using the circulating cooling system of the die casting mold according to an embodiment of the present invention.

First, the coolant is introduced into the center support insert 410 through the coolant feed pipe 432 among the coolant inlet pipes 432 and 430 inserted into the fixed cooling ring 420.

Then, the introduced cooling water flows along the circulation passage inside the center support insert 410 to uniformly cool the center support insert 410.

Next, the coolant is discharged through the coolant drain pipe 430 among the coolant inlet and outlet pipes 432 and 430 inserted into the fixed cooling ring 420.

As described above, in the circulating cooling system of the die casting mold according to the present invention, the entire circumference of the shape is uniformly cooled by applying the circulating cooling system inside the center support insert so that there is no aluminum sintering.

By eliminating thermal stress due to temperature variations, the life of the center support insert can be improved.

In addition, there is no leakage to the fixed cooling ring by using the O-ring that can withstand high temperatures, and can shorten the time spent in mold repair to improve productivity and reduce material costs.

1 is a coolant hole arrangement of the fixed center support according to the prior art.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is an internal cooling configuration diagram of a die casting mold according to the prior art.

4 is a view showing a configuration of a circulating cooling system of a die casting mold according to an embodiment of the present invention.

5 is a diagram illustrating a center support insert configuration according to an embodiment of the present invention.

6 is a cross-sectional view taken along the line A-A of FIG.

FIG. 7 is a sectional view along line B-B in FIG. 5; FIG.

FIG. 8 is a rear view of the center support insert shown in FIG. 5. FIG.

Claims (2)

In the circulating cooling system of the die casting mold, A center support insert in which a coolant circulation flow path is formed so that the coolant is introduced and discharged; A fixed cooling ring coupled to the center support insert in a ring type and having a coolant inlet and outlet connected to a coolant circulation flow path formed in the center support insert; Circulating cooling of the die casting mold comprising a coolant inlet and outlet pipe respectively coupled to the cooling water inlet and outlet of the fixed cooling ring to introduce the coolant into the center support insert and to discharge the coolant from the inside of the center support insert. system. The die casting mold of claim 1, further comprising an O-ring mounted on an outer circumferential surface of the fixed cooling ring to prevent cooling water from leaking between an inner circumferential surface of the center support insert and an outer circumferential surface of the fixed cooling ring. Circulating cooling system.