KR102048571B1 - Molding device for manufacturing tetragonal product - Google Patents

Abstract

According to the present invention, provided is a mold device for manufacturing a square molding product. Specifically, the present invention relates to the mold device for molding a square-shaped molding product comprising an upper core, an upper cooling line formed inside the upper core, a lower core combined with the upper core and forming a square cavity, and a lower cooling line formed inside the lower core. A sprue is formed at a first corner of the upper core and the lower core, a molten metal is induced to flow in a fan shape including an edge and a diagonal direction of the cavity, and an air vent is formed at a second edge facing the first edge in the diagonal direction.

Description

Molding device for manufacturing tetragonal product

The present invention relates to a mold apparatus, and more particularly, to a mold apparatus for producing a rectangular molding having a structure capable of molding a rectangular shaped product and performing uniform cooling.

In general, injection molds are used to produce plastic products, press molds to make products using steel plates, die casting molds to melt metal and form them together with plastics, and molds are made from casting sand, gypsum, aluminum, etc. It can be divided into various types such as casting molds to be produced, and these molds are usually divided into movable molds and fixed molds for smooth production of products.

In general, in the case of injection mold, die casting mold, and casting mold, a cooling device is used to solidify or solidify the molten material.

The mold cooling system constitutes various cooling lines for uniform cooling of the molded products.

1 is a perspective view showing a conventional mold for producing a rectangular molded product, Figure 2 is a bottom perspective view showing an example of a rectangular molded product.

Generally, when the upper core and the lower core having the lower cavity formed with the upper core are formed between the upper mold and the lower mold with each other, the cavity for forming the rectangular molding P is provided.

Then, the molten metal injected into the cavity is solidified by making the pouring holes 1 and the pouring water 2 on one surface of the molded upper core and the lower core and pouring the molten metal through the pouring holes 1 to form a square molded product.

However, because the molten metal is a high temperature, a cooling device is used for the mold to solidify.

Usually, a cooling line 3 through which a refrigerant flows is disposed in the upper core and the lower core, respectively. As illustrated, the cooling line 3 is arranged at regular intervals in parallel with one side of the rectangular molding.

The upper cooling line 3a formed inside the upper core and the lower cooling line 3b formed inside the lower core are respectively cooled to simultaneously cool the upper and lower surfaces of the rectangular molding.

However, the conventional mold of such a structure has some problems.

First, since the molten iron 1 is formed on one surface of the square molding P, the molten metal flows inclined toward the other surface across the center of the square molding P, and some parts flow backward again to form corners located at both sides of the molten steel 1. Part (e) is reached.

In this case, two corners (e) have a problem in that the quality is weakened during solidification due to an increased probability of occurrence of voids compared to other portions. That is, there is a high possibility of a defect.

In addition to the air vent 4 to discharge the air along the other surface of the square molding (P), as well as the air vent (4) must be provided at both corners. That is, there should be a lot of air vents as shown.

The molten portion overflows to a portion where the air vent 4 is formed, and a solidified portion 5 is generated, and the solidified portion 5 is cut at the time of post-processing. Therefore, a lot of parts need to be cut, so the waste of the material is a serious disadvantage.

Second, since the cooling lines 3 are simply arranged in a row, even if a low temperature coolant is introduced from one side, the coolant is discharged at a high temperature toward the other side.

As a result, the molded product solidified in the region where the refrigerant is introduced solidifies quickly and the molded product solidified in the region where the refrigerant is discharged is slowly solidified, thereby causing a problem of not uniformly solidifying the entire molding. In this case, too, the quality becomes weak and defects occur. That is, there is a disadvantage in having a strength lower than the required strength.

Republic of Korea Patent Publication No. 10-2003-0078332 (2003.10.8.) "Panel lower mold cooling device for cathode ray tubes" Republic of Korea Patent Publication 10-2008-0098113 (2008.11.7.) "Injection Molding Machine With Parallel Cooling System" Republic of Korea Patent Registration 10-1216518 (2012.12.21.) "Hold press molding mold with cooling system" Republic of Korea Patent Registration 10-2002862 (2019.7.17.) "Method of manufacturing die-casting integrated water-cooled battery pack cooling device"

Accordingly, the present invention is to solve the above-described problems, an object of the present invention is to provide a mold apparatus for producing a rectangular molding of a structure that can induce the molten metal is uniformly injected into the entire cavity during the production of the rectangular molding and no voids are generated. will be.

Another object of the present invention is to provide a mold apparatus for manufacturing a rectangular molding, in which a part of which hot melt is injected during cooling of the rectangular molding is performed by intensive cooling and the rest is uniformly cooled as a whole.

According to an aspect of the present invention, there is provided a mold apparatus for manufacturing a rectangular molding according to the present invention, an upper core and an upper cooling line formed in the upper core, and a lower core and an lower core which are combined with the upper core to form a rectangular cavity. In the mold apparatus including a lower cooling line formed inside the core, to form a rectangular molded product, the molten metal is formed in the first corner of the upper core and the lower core, so that the molten metal is diagonal to the edge of the cavity The air vent may be formed to flow in a fan shape including a direction and at a second edge facing the first edge in a diagonal direction.

Here, the lower cooling line, the refrigerant flows on a diagonal line connecting the first edge and the second edge adjacent to the first edge, between the third edge and the second edge and between the fourth edge and the second edge. At least one concentrated channel cooling unit for discharging the refrigerant between the edges; The refrigerant flows between the third and second edges or between the fourth and second edges and is adjacent to the second edge, passes through a diagonal line connecting the first and second edges, and the fourth edge. And at least one distribution channel cooling unit for discharging the refrigerant between the second edge or between the third edge and the second edge.

At this time, the intensive channel cooling unit, the centralized cooling inlet is formed on the lower diagonal of the lower core vertically inflow, the centralized cooling inlet is formed vertically on the lower edge of the lower core and the refrigerant is discharged; It may be configured to include a concentrated cooling passage formed in the lower core and communicating the concentrated cooling inlet and the concentrated cooling outlet.

The distribution channel cooling unit may include: a first distribution channel cooling unit in which a coolant flows between the third and second corners and a coolant is discharged between the fourth and second corners of the lower core; A second distribution channel cooling unit in which a coolant flows between the fourth and second corners and a coolant is discharged between the third and second corners of the lower core; The channel cooling unit and the second distribution channel cooling unit may be alternately arranged.

The first distribution channel cooling unit may be formed vertically on one side edge of the lower core and vertically formed on the other side edge of the lower core and vertically formed on the other side edge of the lower core to discharge the refrigerant. A first distribution cooling passage formed in the first distribution cooling outlet and the lower core and bent on a diagonal line connecting the first edge and the second edge to communicate the first distribution cooling inlet and the first distribution cooling outlet; It can be made, including.

In addition, the second distribution channel cooling unit is formed on the lower edge of the lower core perpendicular to the second distribution cooling inlet through which the refrigerant flows, and is formed on the lower edge of the lower core vertically to discharge the refrigerant. A second distribution cooling flow path formed in the second distribution cooling outlet and the lower core and bent on a diagonal line connecting the first and second corners to communicate the second distribution cooling inlet and the second distribution cooling outlet; It can be made, including.

On the other hand, between the concentrated cooling inlet, the spot cooling unit for the refrigerant flowing in and out perpendicular to the lower surface of the lower core may be further provided.

The upper cooling line may be formed in the upper core to cross a diagonal direction, and may be arranged perpendicularly to a diagonal line connecting the first and second edges.

According to the present invention described above, the following effects are obtained.

First, since the molten metal is installed at the corners of the upper and lower cores forming the square molding, the molten metal is uniformly injected into the entire cavity, so that no gap is generated, thereby forming a molding of excellent quality.

Secondly, the central channel cooling unit is arranged to perform intensive cooling at the corners where hot melt is injected during the cooling of the square molding, and the distribution channel cooling unit is arranged to uniformly cool the rest, and the central channel cooling unit is reinforced. In order to further provide a spot cooling unit, the molding can be cooled uniformly as a whole.

Therefore, the quality of the molded article is greatly improved, and thus the tensile and strength, fracture strength, and the like are greatly improved compared to the conventional one.

1 is a perspective view showing a mold for manufacturing a conventional rectangular molding.
2 is a bottom perspective view showing an example of a square molded article
Figure 3 is a cross-sectional perspective view showing the structure of a mold apparatus for producing a square molding according to an embodiment of the present invention
Figure 4 is a perspective view showing the structure of the upper cooling line of the present invention shown in FIG.
5 is a perspective view showing the structure of a lower cooling line of the present invention shown in FIG.
FIG. 6 is a partial perspective view illustrating the concentrated channel cooling unit illustrated in FIG. 5.
FIG. 7 is a partial perspective view illustrating the distribution channel cooling unit illustrated in FIG. 5.
8 is a view showing the structure of the spot cooling unit of the present invention shown in FIG.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. In the following description of the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Figure 3 is a cross-sectional perspective view showing the structure of a mold apparatus for producing a square molding according to an embodiment of the present invention.

The present invention relates to a mold apparatus that can produce a molded product of a square shape, the upper core 100 and the lower core 200, the spout 300 and the air vent 320, the upper cooling line 400 and the lower It may be configured to include a cooling line 500.

First, the upper core 100 and the lower core 200 will be described.

The upper core 100 forms a square shape and is seated on the upper mold, and the upper cavity of the rectangular shape is formed on the lower surface.

The lower core 200 also forms a square shape and is seated on a lower mold, and a lower cavity having a square shape is formed on an upper surface thereof.

When the upper core 100 and the lower core 200 are integrated with each other, the upper cavity and the lower cavity are connected and sealed to form a rectangular cavity c.

A rectangular molded product is manufactured by injecting molten metal into such cavity (c).

Next, a description will be given of the tanggu 300 and the tangdo 310 and the air vent (320).

In the present invention, the spout 300 is formed at any one of four corners of the upper core 100 and the lower core 200. That is, in the related art, although a molten metal is formed on one of the four surfaces of the upper core and the lower core instead of the edge, molten metal is injected, but the molten metal and the molten metal are formed in the corner.

As shown, the tanggu 300 and the tangdo 310 is formed on the edge (first corner) side of the upper core 100 and the lower core 200. Thus, the molten metal is injected into the edge of the cavity (c) and flows along the edge and the diagonal direction of the cavity (c). That is, the molten metal is induced to flow in a fan shape.

The flowing molten metal is finally collected at the corners at which the molten metal is injected, that is, at the corners of the upper and lower cores opposite to the first corners (the second corners), so that no reverse flow occurs.

In addition, by allowing one or more air vents 320 to be formed at the side of the second corner e2 where the molten metals are collected, air can be evacuated.

As such, the molten iron 300 is positioned at the corner, so that the molten metal may be filled while flowing uniformly over the entire surface of the cavity c, and almost no void occurs because there is no backflow.

In addition, since the air vent 320 only needs to be provided at the opposite corner where the molten metal is finally collected, the number of the air vent 320 can be greatly reduced as compared with the related art. This can minimize the solidified portion s other than the molding caused by the overflow due to the air vent, which greatly reduces material waste.

Next, the upper cooling line will be described with reference to FIG. 4. 4 is a perspective view showing the structure of the upper cooling line of the present invention shown in FIG. Here, the upper cooling line shown in Figure 4 shows the arrangement of the flow path excluding the upper core.

The upper cooling line 400 is formed in the upper core 100 and flows through which a coolant flows. The flowing coolant cools the molten metal injected into the cavity c by cooling the upper core 100. , Solidify.

As shown in the upper cooling line 400, refrigerant is introduced from one side of the upper core 100 and discharged from the other side.

In this case, a plurality of the upper cooling line 400 may be arranged at regular intervals.

The upper cooling line 400 is vertically disposed across a diagonal line connecting the first edge e1 and the second edge e2 of the upper core 100. In other words, it can be arranged in a direction perpendicular to the flow of the melt.

Next, the lower cooling line will be described with reference to FIG. 5. FIG. 5 is a perspective view illustrating a structure of a lower cooling line of the present invention shown in FIG. 3, FIG. 6 is a partial perspective view illustrating a concentrated channel cooling unit illustrated in FIG. 5, and FIG. 7 is a distribution channel cooling unit illustrated in FIG. 5. Partial perspective view showing. For reference, FIG. 5 is a view inverting FIG. 4 so that the lower cooling line is easily seen.

The lower cooling line 500 is formed in the lower core 200 and flows through which a coolant flows. The coolant cools the molding p by cooling the lower core 200.

The upper cooling line 400 may have a simple structure because the shape of the upper surface of the molding p is flat, but the lower surface of the molding p may form a complicated shape as shown in the lower cooling line 500. ) Needs to have a more sophisticated cooling structure.

To this end, the upper cooling line 400 may be divided into a concentrated channel cooling unit 510, a distribution channel cooling unit 520, and a spot cooling unit 530 to perform cooling.

The concentrated channel cooling unit 510 is configured to intensively cool around the first edge e1 in which the spout 300 is formed.

The region adjacent to the first edge e1 is the region where the high temperature molten metal first enters, and thus is the highest temperature. In order to uniformly cool the other part, the area having the first edge should be concentrated in consideration of the temperature difference.

Thus, the concentrated channel cooling unit 510 may be a substantially 'c' shaped flow path. The concentrated cooling inlet 511 may be formed at one side thereof, and the concentrated cooling outlet 512 may be formed at the other side thereof. Is formed. In addition, the centralized cooling inlet 511 and the centralized cooling outlet 512 may be communicated by the centralized cooling passage 513 penetrating the inside of the lower core 200.

The centralized cooling inlet 511 and the centralized cooling outlet 512 may have a structure such as a groove formed perpendicularly to the lower surface of the lower core 200.

The concentrated cooling inlet 511 may be formed on a diagonal line connecting the first edge e1 and the second edge e2 of the lower core 200. This is because the molten metal introduced into the tuyere 300 flows along the diagonal and both edges connecting the first edge e1 and the second edge e2 of the lower core 200.

In addition, the centralized cooling outlet 512 may be formed at two other corners between the first edge e1 and the second edge e2, that is, the third edge e3 and the fourth edge e4. Specifically, the lower core 200 is formed at the edge of the lower core 200 between the third edge e3 and the second edge e2 or between the fourth edge e4 and the second edge e2. It may be formed on the edge of the).

In addition, the intensive cooling flow path 513 starts at the first edge e1 and connects a first edge e1 and a third edge e3, and a first edge e1 and a fourth edge e4. It is formed along the edge connecting the).

Next, the distribution channel cooling unit 520 is configured to cool the remaining portions as a whole except for the region to be cooled by the concentrated channel cooling unit 510.

The distribution channel cooling unit 520 is also formed inside the lower core 200, and may have a shape in which a distribution cooling inlet and a distribution cooling outlet are formed at both ends of a distribution cooling flow path having a 'V' shape at one side. .

The plurality of distribution channel cooling units 520 may be arranged, which may be divided into a first distribution channel cooling unit 521 and a second distribution channel cooling unit 525, and alternately arranged.

The first distribution channel cooling unit 521 communicates with the first distribution cooling channel 524 that is bent in a 'V' shape and one side of the first distribution cooling channel 524, and the lower surface of the lower core 200. A first distribution cooling inlet 522 formed perpendicular to the first distribution cooling inlet 522 and a first distribution cooling outlet 523 formed perpendicular to a lower surface of the lower core 200 while communicating with the other side of the first distribution cooling channel 524. It can be configured as.

Similarly, the second distribution channel cooling unit 525 communicates with the second distribution cooling channel 528 bent in a 'V' shape and one side of the second distribution cooling channel 528, and the lower core 200. The second distribution cooling inlet 526 is formed perpendicular to the lower surface of the second distribution cooling inlet 526 is in communication with the other side of the second distribution cooling flow path 528 is formed perpendicular to the lower surface of the lower core 200 ( 527).

In this case, the first distribution cooling passage 524 and the second distribution cooling passage 528 are bent on a diagonal line connecting the first edge e1 and the second edge e2.

The first distribution cooling inlet 522 and the second distribution cooling outlet 527 are formed along the edge of the lower core 200 connecting the second edge e2 and the third edge e3. The first distribution cooling outlet 523 and the second distribution cooling inlet 526 are formed along an edge of the lower core 200 connecting the second edge e2 and the fourth edge e4.

Therefore, the first distribution channel cooling unit 521 and the second distribution channel cooling unit 525 are alternately arranged, not a structure in which only one refrigerant flows in on one side and only one side discharges refrigerant on the other side. The refrigerant flowing in and out between the second edge e2 and the third edge e3 may be alternately repeated, and the refrigerant is also discharged between the second edge e2 and the fourth edge e4. Since the inflow is alternately repeated, uniform cooling can be achieved throughout the molding p.

On the other hand, it is preferable that at least one spot cooling unit 530 is further provided in the region where the concentrated channel cooling unit 510, more specifically, the concentrated cooling inlet 511 is located. Because the first corner (e1) is a region where a high temperature of the molten metal is introduced, it can be said to reinforce it because the required cooling may be insufficient only by the concentrated channel cooling unit 510 because the temperature is very high.

8 is a view showing the structure of the spot cooling unit of the present invention shown in FIG.

As shown, the spot cooling unit 530 cools one point, and has a structure in which the refrigerant is discharged again in the direction in which the refrigerant is introduced.

The spot cooling unit 530 is formed vertically in the lower core 200.

A spot cooling discharge groove 533 having a vertical groove shape is formed in the lower core 200, and a spot cooling inlet pipe 531 is formed in the spot cooling discharge groove 533.

A spot cooling inlet 532 is formed at an end of the spot cooling inlet pipe 531, and a spot cooling outlet 534 is formed at one side of the spot cooling discharge groove 533.

Therefore, a refrigerant flows into the spot cooling inlet 532 and is transferred to the spot cooling discharge groove 533 through the spot cooling inlet pipe 531 to locally cool the lower core 200 and to provide the spot cooling outlet ( Through 534).

The spot cooling unit 530 may be appropriately adjusted according to the temperature of the molten metal.

Although the exemplary embodiments of the present invention have been described above with reference to the drawings, those skilled in the art will be able to perform various applications and modifications within the scope of the present invention based on the above contents. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be defined by the claims below and equivalents thereof.

100: upper core
200: lower core
300: Tanggu
310: Tendo 320: Air Vent
400: upper cooling line
500: lower cooling line
510: centralized channel cooling unit 511: centralized cooling inlet
512: centralized cooling outlet 513: centralized cooling flow path
520: distribution channel cooling unit 521: first distribution channel cooling unit
522: first distribution cooling inlet 523: first distribution cooling inlet
524: first distribution cooling channel 525: second distribution channel cooling unit
526: second distribution cooling inlet 527: second distribution cooling inlet
528: second distribution cooling flow path 530: spot cooling unit
531: spot cooling inlet 532: spot cooling inlet
533: spot cooling outlet 534: spot cooling outlet
c: cavity
e1: first corner e2: second corner
e3: third corner e4: fourth corner

Claims (8)

An upper core and an upper cooling line formed inside the upper core, and a lower core forming an inside of the lower core and a lower cooling line formed inside the lower core to form a rectangular cavity. In the mold apparatus for molding,
By forming a spout in the first corner of the upper core and the lower core,
The molten metal is induced to flow in a fan shape including the edge and the diagonal direction of the cavity,
Molding apparatus for producing a rectangular molding, characterized in that the air vent is formed in the second corner facing the first corner in the diagonal direction. The method of claim 1,
The lower cooling line,
At least one refrigerant flowing in a diagonal line adjacent to the first edge and connecting the first and second edges, and the refrigerant is discharged between the third and second edges and between the fourth and second edges. Concentrated channel cooling unit;
The refrigerant flows between the third and second edges or between the fourth and second edges and is adjacent to the second edge, passes through a diagonal line connecting the first and second edges, and the fourth edge. And at least one distribution channel cooling unit for discharging the refrigerant between the second corner or between the third and second corners. The method of claim 2,
The concentrated channel cooling unit,
A centralized cooling inlet formed vertically on a lower surface of the lower core to allow refrigerant to flow therein, a centralized cooling outlet formed vertically on the lower edge of the lower core to discharge the refrigerant, and formed inside the lower core; Mold apparatus for producing a rectangular molded product, characterized in that it comprises a concentrated cooling passage for communicating the concentrated cooling inlet and the concentrated cooling outlet. The method of claim 2,
The distribution channel cooling unit,
A first distribution channel cooling unit in which a coolant flows between the third and second corners and a coolant is discharged between the fourth and second corners of the lower core;
A second distribution channel cooling unit in which a coolant flows between the fourth and second corners and a coolant is discharged between the third and second corners of the lower core;
And the first distribution channel cooling unit and the second distribution channel cooling unit are alternately arranged. The method of claim 4, wherein
The first distribution channel cooling unit,
A first distribution cooling inlet formed vertically on one side edge of the lower core and receiving refrigerant, a first distribution cooling outlet formed vertically on the other bottom edge of the lower core and discharging the refrigerant; A rectangular molded product formed inside the core and bent on a diagonal line connecting the first and second corners, wherein the first molded cooling inlet and the first distribution cooling discharge port comprises a first molded cooling passage comprising: Molding device for manufacturing. The method of claim 4, wherein
The second distribution channel cooling unit,
A second distribution cooling inlet formed vertically on the lower edge of the lower core to allow the refrigerant to flow therein; a second distribution cooling outlet formed vertically on the lower edge of the lower core to discharge the coolant; A rectangular molded product formed in the core and bent on a diagonal line connecting the first and second corners, the second molded cooling passage including a second distribution cooling passage communicating the second distribution cooling inlet and the second distribution cooling outlet; Molding device for manufacturing. The method of claim 3, wherein
Between the concentrated cooling inlet,
Square apparatus for manufacturing a molded product, characterized in that the spot cooling unit for the refrigerant is introduced and discharged vertically further to the lower surface of the lower core. The method of claim 1,
The upper cooling line,
Is formed across the diagonal direction inside the upper core,
Mold apparatus for producing a rectangular molded product, characterized in that arranged in a perpendicular to the diagonal connecting the first corner and the second corner.

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