KR102126499B1 - Cooler for diecasting - Google Patents

Abstract

The present invention relates to a cooler for a die-casting mold, which is formed in a hollow tube shape, has an inner flow path, and is coupled to a socket 130 to introduce cooling water into the mold 200 and the inner pipe 110. It is provided to accommodate the outer peripheral surface of the middle to provide an annular flow path and is coupled to the socket 130 to the outer pipe 120 for discharging cooling water from the mold 200, and the inner pipe 110 and the rear of the outer pipe 120 A socket 130 having an inlet 131 and an outlet 132 that are coupled and communicate with each other, and an inlet connector 141 that is coupled to the outer circumferential surface of the socket 130 and communicates with the inlet 131 and outlet 132, respectively. ) And a cooler head 140 having a discharge connector 142, and the inner pipe 110 includes an arbitrary tip angle in a diagonal direction from one point P1 of the leading edge portion to the other point P2. It is formed so as to have a closed prevention portion 111 having an elliptical cross-sectional shape, and a plurality of formed to communicate with the inner flow path at the outer circumferential surface of the tip portion, but arranged spirally in the longitudinal direction at a point spaced apart from the outer pipe 120 by a certain distance. It is characterized by having a structure that facilitates the circulation of cooling water as it is constructed by including the radiating portion 112, thereby significantly increasing the cooling efficiency and having easy processability.

Description

Cooler for die casting mold {COOLER FOR DIECASTING}

The present invention relates to a cooler for a die-casting mold, and more particularly, to a cooler for a die-casting mold that is mounted on a small die-casting mold, such as a core mold, and effectively cools and discharges cooling water, thereby increasing the cooling efficiency of the mold and having excellent processability.

Generally, die casting is a casting method in which a melt is injected into a mold to form a product having the same shape as the mold.

The die casting process is performed over a process of completing the product through post-processing after removing the mold by demolding the mold, maintaining the metal under high pressure by injecting the metal dissolved in the mold under high pressure. In particular, the operation of cooling the temperature of the mold for demoulding has a profound effect on the completeness of the product when taken out.

Therefore, each part of the die-casting mold is equipped with a cooling device, that is, a cooler to supply and circulate cooling water, thereby effectively controlling the mold temperature.

Looking at the general configuration of the cooling device for a mold through a known technique, as an example, in Korean Patent Publication No. 10-2003-0087721 is configured inside the mold, a plurality of coolers for cooling the mold, and cooling water in the coolers And a plurality of cooling water lines for supplying and discharging, and a cooling water circulation device of a die casting mold consisting of a plurality of water supply and drain lines for supplying and draining cooling water connected to the cooling water lines from the outside of the mold.

As another example, in Korean Patent No. 10-1499438, an internal space is formed and an external pipe disposed inside the mold, and a water supply channel and cooling water discharged into the internal space of the external pipe to supply cooling water are discharged. A cooler head having an internal pipe for partitioning a drainage passage, a water supply passage of an external pipe with an inner pipe inserted therein, and a movement passage formed to be connected to a drainage passage, and a water supply installed in the cooler head so that cooling water moves to the drainage passage by inserting an internal pipe. A cooling device for a die casting mold comprising a valve and a drain valve disposed so as to be movable inside the drain valve movement space formed inside the cooler head.

As another example, in Korean Registered Patent No. 10-1802991, an outer pipe in which a tip portion is inserted into a cooling hole of a mold is formed on a cooler head having an inlet and a drain, and the outer diameter of the outer pipe is reduced than the outer pipe. An internal pipe is installed, but the cooling water flowing into the inlet is introduced into the water supply passage inside the internal pipe, and the cooling water is drained into the drain through a drainage passage formed between the outer periphery of the inner pipe and the inner periphery of the outer pipe through the cooling hole. Constituting a mold cooler, a locking jaw of a size that does not block a drainage passage is fixedly installed at a predetermined position on the outer circumference of the inner pipe, and a lower end of a hatch-shaped spring is installed on a locking jaw in the drainage passage. As the inner and outer peripheries are formed in a size that does not contact the inner pipe and the outer pipe, the coil spring in the form of a coil spring is formed in a hat-shaped shape with a concave bending in the longitudinal direction of the center of the strip-shaped steel plate. It constitutes a mold cooler of a die casting mold including a configuration that is installed to face the direction.

Korean Patent Publication No. 10-2003-0087721 (2003.11.15) Korean Registered Patent No. 10-1499438 (2015.03.06) Korean Registered Patent No. 10-1802991 (2017.11.29) Korean Patent Publication No. 10-2018-0060601 (2018.06.07)

The cooling device for a conventional die casting mold is formed by installing a plurality of coolers inside the mold and circulating the cooling water from the outside through a water supply and drainage line to cool the mold.

The cooler for cooling a mold to which the above-described prior art is applied is configured to include a head having an inlet and a drain, and a pipe for introducing cooling water into the cooling hole of the mold and a pipe for discharging.

However, in the cooler according to the prior art, it is difficult to grasp the position where the tip of the pipe injected into the mold is inserted into the inside of the mold, and as shown in FIG. 6, the tip or outlet of the pipe is made in a flat shape. This causes a problem that the tip of the pipe comes into contact with the inner surface of the mold.

Eventually, when the pipe outlet or inlet of the cooler is closed or inserted very close to the inner surface of the mold, there is not enough flow of coolant and the scale is deposited around the inlet, causing frequent problems, and conversely, the pipe When inserting the leading end of the mold away from the inner surface of the mold, it is difficult to control the pressure of the cooling water and it is difficult to supply the cooling water evenly inside the mold.

If the circulation of the cooling water through the cooler is not smoothly performed, the cooling efficiency of the mold is drastically lowered, resulting in a problem in the die casting process and product quality, thereby deteriorating productivity.

In another cooler according to the prior art, attempts have been made to improve the flowability of cooling water by forming a helical structure on the outer or inner circumferential surface of a pipe inserted into a mold, but the processability is very good for pipes with a diameter of 2 mm or less, such as a cooler for a small die casting mold. Since it is low, it is inevitable to increase the manufacturing cost.

Therefore, in the present invention, the present invention was solved to solve the problems of the prior art as described above.

It is made of a hollow tube having an internal flow path and coupled to the socket 130, the inner pipe 110 for introducing cooling water into the mold 200,

The outer pipe 120 is provided to accommodate the outer circumferential surface of the inner portion of the inner pipe 110 to provide an annular flow path, and coupled to the socket 130 to discharge cooling water from the mold 200.

A socket 130 having an inlet 131 and an outlet 132 coupled to the rear portions of the inner pipe 110 and the outer pipe 120 and communicating with each other,

Includes a cooler head 140 coupled to the outer circumferential surface of the socket 130 and having an inlet connector 141 and an outlet connector 142 communicating with the inlet 131 and outlet 132, respectively,

In the inner pipe 110,

A closing prevention unit 111 having an elliptical cross-sectional shape by having an arbitrary tip angle in a diagonal direction from one point P1 of the leading edge portion to the other point P2;

In the outer circumferential surface of the distal end portion is formed to communicate with the inner flow path, but includes a radiating portion 112 disposed in a spiral in the longitudinal direction at a point spaced apart from the outer pipe 120,

In the closing preventing portion 111,

Active circulation of the cooling water is provided by forming a circular or elliptical periphery on the inner circumferential surface between the one side point P1 and the other side point P2 and having a vortex-inducing groove 113 for bending the center portion to a certain depth. It is possible to achieve the object of providing a cooler having a structure with easy processability while inducing a significant increase in cooling efficiency.

The present invention constitutes a cooler for a die casting mold that is mounted on a die casting mold to cool the mold by introducing and discharging cooling water, but constitutes a cooler formed by inserting an internal pipe having a diameter of 2 mm or less into a small die casting mold such as a core mold.

In particular, the present invention is provided with a closing prevention portion on the inner pipe inserted into the mold, which eliminates the problem of frequently causing the exit to be closed because the tip of the pipe injected into the mold is in contact with the inner surface of the mold or the scale is deposited. can do.

In addition, the present invention is provided with a radiating portion at the tip of the inner pipe, and by providing a vortex-inducing groove inside the closing prevention portion, the cooling water is spirally radiated and vortexed into the mold, thereby significantly increasing the cooling efficiency compared to the cooler of the prior art. And it has the advantage of being relatively easy to process and realizing the manufacturing cost.

1 is a perspective view of a cooler for a die casting mold according to the present invention.
Figure 2 is a plan view (a) and a front view (b) and a cross-sectional enlarged view taken along the line BB of the die casting mold cooler according to the present invention.
3 is a cross-sectional view taken along line AA of FIG. 2;
4 is a perspective view (a) and a cross-sectional view (b) (c) according to another embodiment of the cooler for a die casting mold according to the present invention.
Figure 5 is an exemplary use of a die casting mold cooler according to the present invention.
Figure 6 is an exemplary use of a conventional die casting mold cooler applied.

Hereinafter, the configuration and operation according to a preferred embodiment of the die casting mold cooler of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of parts that can be easily implemented by those skilled in the art may be omitted.

1 is a perspective view of a cooler for a die-casting mold according to the present invention, FIG. 2 is a plan view (a) and a front view (b) of the die-casting mold cooler according to the present invention, and an enlarged cross-sectional view taken along line BB, FIG. Cross-sectional view taken along line AA, Figure 4 is a perspective view (a) and a cross-sectional view (b) (c) according to another embodiment of the die-casting mold cooler according to the present invention, Figure 5 is an exemplary view of use of the die-casting mold cooler according to the present invention , FIG. 6 is a diagram showing an exemplary use of a cooler for a conventional die casting mold.

The cooler 100 for a die casting mold to which the technology of the present invention is applied comprises a cooler 100 mounted on the die casting mold 200 to cool and cool the mold 200 by introducing and draining cooling water, but a small die casting mold such as a core mold ( Note that it relates to a cooler 100 made of a form in which the inner pipe 110 having a diameter of 2 mm or less is inserted into 200).

The die casting mold cooler 100 of the present invention for this purpose is largely built into the inner pipe 110 and the outer pipe 120, the cooler head 140, and the cooler head 140 to communicate with them, as shown in FIG. It comprises a socket 130, and is specifically as follows.

The inner pipe 110 is made of a hollow tube shape, is provided with an inner flow path and is configured to flow into the socket 130 to introduce cooling water into the mold 200.

The inner pipe 110 is provided in the form of a micro tube having an outer diameter of 2 mm or less to be suitable for a small mold 200 such as a core mold, and a high-strength stainless steel material excellent in heat resistance and corrosion resistance to be suitable for a use environment such as a high temperature mold inside. It is equipped with.

The inner pipe 110 has a predetermined length toward the other side to be inserted into the mold 200 through an intermediate portion that is accommodated in the outer pipe 120 and forms a through hole communicating with the inlet 131 on one side coupled to the socket 130 Form as

On the other hand, as shown in FIG. 3, the inner pipe 110 is provided with a closing preventing portion 111 and a radiating portion 112 for smooth inflow and circulation of cooling water.

The closing preventing portion 111 is formed to have an arbitrary tip angle in a diagonal direction from one point P1 of the leading edge of the inner pipe 110 toward the other point P2. Therefore, when the inner pipe 110 is inserted into the mold 200, even if the other point P2 of the tip abuts the inner surface of the mold 200, a structure capable of introducing cooling water is provided. In the embodiment of the present invention, the tip angle of the closing preventing portion 111 is formed at an angle of about 45 degrees, but the range can be adjusted according to the internal structure of the mold 200.

The closing preventing portion 111 is configured to increase the inflow amount per cross-sectional area of the inner pipe 110 made of a small diameter by providing the tip end surface of the inner pipe 110 to have an oval shape.

In addition, the closing preventing portion 111 forms a peripheral portion of a circular or elliptical shape on the inner circumferential surface between the one point (P1) and the other point (P2), and the center of the vortex induction groove (113) by bending the center to a certain depth It is provided.

The vortex-inducing groove 113 is formed by processing to infiltrate between the inner circumferential surface and the outer circumferential surface of the closing preventing portion 111 to a certain depth. In an embodiment of the present invention, the vortex-inducing groove 113 is configured to be processed into an elliptical shape along the longitudinal direction of the closing preventing portion 111, but one or more may be provided as shown in FIG. 4. Since the inner circumferential surface between the one point P1 and the other point P2 is exposed to one side of the closing prevention part 111, even if it is an inner pipe 110 made of high-strength stainless steel, it has an advantage of relatively easy processability.

The radiating portion 112 is formed by forming a plurality in communication with the inner flow path on the outer circumferential surface of the front end portion of the inner pipe 110, but is formed by spirally arranging in the longitudinal direction at a point spaced apart from the outer pipe 120 by a certain distance.

The radiating portion 112 is formed with a through hole of 0.5 mm or less to extrude cooling water passing through the inner pipe 110 to the outside. The radiating part 112 increases the inflow amount of the cooling water and draws an active flow by cooling the cooling water flowing through the inner pipe 110 separately from the closing prevention part 111 into the mold 200 in all directions. Provided to increase efficiency.

The radiating portion 112 is arranged in a spiral along the inner pipe 110 on one side of the closing preventing portion 111, but provided with a predetermined distance from the outer pipe 120 through which the cooling water is discharged, and the cooling water discharged. Configured to prevent crosstalk.

In the exemplary embodiment of the present invention, the radiator 112 is provided in a vertical cylindrical shape, but as shown in FIG. 4, if it is provided in a cone shape of inner light negotiation, the extrusion is easier or the inner and outer radiating angles are not vertical. It can be provided in the form of having or arranged in an annular shape to control the extrusion direction of the cooling water in various ways.

The outer pipe 120 is configured to accommodate the outer circumferential surface of the inner portion of the inner pipe 110 to provide an annular flow path and is coupled to the socket 130 to discharge cooling water from the mold 200.

The outer pipe 120 is provided in the form of a hollow tube having an inner diameter of 3 mm or more to provide an annular flow path while accommodating the inner pipe 110. One side coupled to the socket 130 forms a through hole communicating with the outlet 132 of the socket 130 and accommodates the inner pipe 110 to provide an annular flow path to the other side coupled to the mold 200 It is formed into the length of.

The outer pipe 120 has a coupling portion and an airtight means mounted on the mold 200 to discharge cooling water. Therefore, the external pipe 120 is also provided with a high-strength stainless steel material excellent in heat resistance and corrosion resistance.

The socket 130 is configured to include an inlet 131 and an outlet 132 which are coupled to the rear portions of the inner pipe 110 and the outer pipe 120 and communicate with each other.

The socket 130 is configured to implement a close coupling relationship between the inner pipe 110 and the outer pipe 120 and the cooler head 140, and an inlet 131 communicating with the inner pipe 110 on the outer circumferential surface. The outlets 132 communicating with the outer pipes 120 are respectively formed. That is, the inner pipe 110 is inserted into a deep portion of the inner circumferential surface of the socket 130 to communicate with the inlet 131, and a space formed between the outlet 132 of the socket 130 and the outer circumferential surface of the inner pipe 110. With the outer pipe 120 is provided to communicate.

The cooler head 140 is configured to include an inlet connector 141 and an outlet connector 142 coupled to the outer circumferential surface of the socket 130 and communicating with the inlet 131 and outlet 132, respectively.

The cooler head 140 includes an inlet connector 141 connecting a cooling water supply line to one side and an outlet connector 142 connecting a cooling water discharge line, and the socket 130 is mounted on the inner circumferential surface to provide an inlet connector 141 ) And the inlet 131, the discharge connector 142 and the outlet 132 are provided to communicate with each other. That is, the inlet connector 141 of the cooler head 140 and the inlet 131 of the socket 130 and the inner pipe 110 communicate with each other to form a flow path for cooling water inflow, and the outer pipe 120 The outlet 132 of the socket 130 and the discharge connector 142 of the cooler head 140 communicate with each other to circulate inside the mold 200 to form a flow path for discharging cooling water discharged.

Hereinafter, the use state of the die casting mold cooler 100 to which the technology of the present invention having the above-described configuration is applied will be described. Since the following description is to describe the preferred embodiment for the present invention, the present invention is not limited by the following examples, it will be understood that various modifications can be provided within the scope of the scope of the present invention. .

According to the structure of the mold 200 to install the cooler 100 of the present invention, the lengths of the inner pipe 110 and the outer pipe 120 are set in advance. As illustrated in FIG. 5, the inner pipe 110 is inserted into the mold 200 and the coupling portion provided at the front end of the outer pipe 120 is tightly coupled to the mold 200 to be installed.

Since the closing preventing portion 111 provided at the front end of the inner pipe 110 is installed to be adjacent to the inside of the mold 200, the cooler 100 of the present invention has an inner pipe 110 within the mold 200. Even if it comes into contact with the side, the contact is made only at the other point P2 of the closing prevention part 111, so that the cooling water can be introduced.

A cooling water supply line is connected to the inlet connector 141 of the cooler head 140 and cooling water is supplied. Cooling water flows into the inlet 131 of the socket 130 coupled to the inner circumferential surface of the cooler head 140, and the inlet 131 communicates with the inner pipe 110 coupled to the deep portion of the socket 130, so that the cooling water It flows into the inner flow path of the inner pipe (110).

The cooling water transferred along the inner pipe 110 is radially extruded in a spiral or annular shape into the interior of the mold 200 as shown in FIG. 5 through the radiating portion 112 provided at the tip. The radiating part 112 is formed in a cylindrical shape perpendicular to the longitudinal direction of the inner pipe 110 or inclined in the injection direction to flow cooling water into the mold 200.

In addition, the cooling water transported along the inner pipe 110 flows into the tip closing prevention part 111 through the radiating part 112 by a predetermined pressure, so that one side point P1 of the closing prevention part 111 In the other point (P2) is introduced into the mold 200 through an elliptical tip cross-section formed in a diagonal direction.

At this time, since one or a plurality of vortex induction grooves 113 are bent and curved on the inner circumferential surface of the closing preventing portion 111, cooling water is induced along the curved bottom surface of the vortex induction groove 113 as shown in FIG. A vortex flows from the outside of the closing preventing part 111 and flows in.

Therefore, the cooling water flowing into the mold 200 passing through the radiating portion 112 and the closing preventing portion 111 is actively flowed in an arbitrary direction to cool the inside of the mold 200 while rapidly increasing the cooling water. It acts to discharge to the external pipe (120).

The coolant circulating inside the mold 200 is discharged to the socket 130 through the annular flow path through the tip of the external pipe 120, and the cooler head communicating with the outlet 132 of the socket 130 ( 140) is subjected to a circulation process that is discharged to the outside through the discharge connector 142.

The cooler 100 for a die casting mold according to the present invention as described above constitutes a cooler 100 made of a form in which an inner pipe 110 having a diameter of 2 mm or less is inserted into a small die casting mold 200 such as a core mold. The cooler 100 of the present invention is provided with a closing preventing portion 111 at the tip of the inner pipe 110 so that the tip of the pipe injected into the mold 200 is in contact with the inner surface of the mold 200 as in the prior art. Alternatively, the problem of causing the closing of the entrance and exit due to the deposition of the scale can be basically excluded.

In particular, the present invention is provided with a radiating section 112 at the tip of the inner pipe 110, and a vortex induction groove 113 is provided inside the closing prevention section 111 to radiate cooling water in the mold 200 radially. It is configured to flow while rising. Therefore, by inducing the circulation of the cooling water more actively, not only significantly increases the cooling efficiency compared to the cooler of the prior art, but also considers the characteristics of the relatively high-strength material with low processability, while implementing the above-described functions and making it easier to process. Providing a cooler for die-casting molds that combines low-cost, high-functionality, such as deriving, is expected to have a great potential for industrial use.

100: cooler
110: internal pipe
111: closing prevention unit
112: radiating section
113: vortex induction home
120: external pipe
130: socket
131: inlet
132: outlet
140: cooler head
141: inlet connector
142: exhaust connector
200: die casting mold

Claims (2)

It is made of a hollow tube having an inner flow path and coupled to the socket 130, the inner pipe 110 for introducing cooling water into the mold 200,
The outer pipe 120 is provided to accommodate the outer circumferential surface of the inner portion of the inner pipe 110 to provide an annular flow path, and coupled to the socket 130 to discharge cooling water from the mold 200.
A socket 130 having an inlet 131 and an outlet 132 coupled to the rear portions of the inner pipe 110 and the outer pipe 120 and communicating with each other,
A cooler head 140 coupled to the outer circumferential surface of the socket 130 and having an inlet connector 141 and an outlet connector 142 communicating with the inlet 131 and outlet 132, respectively, and
In the inner pipe 110,
A closing prevention unit 111 having an elliptical cross-sectional shape by forming an arbitrary tip angle in a diagonal direction from one point P1 of the leading edge portion to the other point P2;
In the outer circumferential surface of the distal end portion is formed to communicate with the inner flow path, but includes a radiating portion 112 disposed in a spiral in the longitudinal direction at a point spaced apart from the outer pipe 120,
In the closing preventing portion 111,
Die casting characterized in that it is configured to have a vortex-inducing groove (113) that forms a periphery of a circular or elliptical shape on the inner circumferential surface between the one point (P1) and the other point (P2) and curves the center to a certain depth. Cooler for mold. delete

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