KR102347160B1 - Vertical injection type diecasting machine - Google Patents

Abstract

The present invention relates to a vertical injection type die casting apparatus and, more particularly, to a vertical injection type die casting apparatus for clamping a die in a horizontal direction and injecting molten metal in a vertical upward direction. The vertical injection type die casting apparatus according to the present invention comprises: a fixated surface plate to which a fixated die forming a cavity by die spotting with a moving die is coupled; a main frame to which the fixated surface plate is coupled; a support frame detachably coupled to the lower part of the fixated surface plate; and a molten metal injection unit mounted in the support frame to be able to rotate around a rotary shaft and injecting molten metal into the cavity positioned at the upper part. The fixed surface plate includes: a die coupling unit which is mounted on the upper part of the main frame and to which the fixated die is coupled; and two frame coupling units formed extending in a horizontal direction from the lower part of the die coupling unit. The support frame includes: two vertical frames detachably coupled to the lower part of the frame coupling unit to be located on both sides around the molten metal injection unit; and a horizontal frame connecting the two vertical frames. The present invention can enhance quality of a product by increasing molten metal fill density within the die cavity.

Description

Vertical injection type diecasting machine

The present invention relates to a vertical injection type die casting apparatus, and more particularly, to a vertical injection type die casting apparatus for clamping a mold in a horizontal direction and injecting a molten metal in a vertical upward direction.

The die casting apparatus can be classified into a vertical injection type die casting apparatus that injects molten metal upwards into the hole (sprue) of the mold, and a horizontal die casting apparatus that injects the molten metal sideways into the hole (sprue) of the mold.

The vertical injection die casting device clamps the mold horizontally and injects the molten metal vertically. This die casting device injects molten metal into the casting sleeve, then raises the casting sleeve toward the fixed sleeve of the mold, and injects the molten metal into the casting cavity of the mold with a plunger operated by oil pressure.

The vertical injection die casting device shortens the movement path of the casting sleeve into which the molten metal is injected, thereby reducing the decrease in temperature. Not only can it be minimized, but it also has the advantage of effectively transmitting the injection pressure because the plunger is located exactly opposite the mold cavity when the molten metal is completely filled in the cavity.

However, since the injection device for injecting the molten metal into the mold cavity is supported by the support rods hanging from the pillars supporting the fixed surface plate, there is a problem in that the columns supporting the fixed surface plate are bent by the weight of the injection device. Due to this problem, a gap is generated between the casting sleeve and the fixed sleeve of the mold, and as a result, the molten metal leaks through the gap, and there is a problem in that the defective rate of the product is increased.

Republic of Korea Patent Publication No. 10-1990-0011529 (1990.08.01.) Republic of Korea Patent Publication No. 10-1986-0004716 (July 11, 1986)

The present invention is to solve the above-mentioned problems, and can stably support the heavy molten metal injection part, and increase the precision of bonding with the mold for injecting the molten metal into the cavity of the mold to improve the quality of the product. An object of the present invention is to provide a die casting apparatus.

In order to achieve the above object, the vertical injection die casting apparatus of the present invention includes: a fixed platen to which a fixed mold forming a cavity is coupled with a moving mold; a main frame to which the fixed surface plate is coupled; a support frame detachably coupled to a lower portion of the fixed plate; It is rotatably mounted on the support frame about a rotation axis, and includes a molten metal injection part for injecting molten metal into the cavity located on the upper part,

The fixed platen includes a mold coupling part mounted on the main frame and coupled to the fixed mold, and two frame coupling parts extending in the horizontal direction from the lower part of the mold coupling part,

The support frame is detachably coupled to the lower portion of the frame coupling unit and includes two vertical frames positioned on both sides around the molten metal injection unit, and a horizontal frame connecting the two vertical frames.

The vertical injection die casting apparatus of the present invention further includes a support block mounted on the main frame and supporting an end of the frame coupling part protruding from the mold coupling part from the bottom.

The vertical injection die casting apparatus of the present invention further includes a tilting stopper for limiting rotation of the molten metal injection unit so that the position of the molten metal sleeve formed on the molten metal injection unit and the position of the sprue of the cavity coincide in the vertical direction. The stopper can be expanded and contracted to change the stop position of the molten metal ejection part.

A key groove is formed between the fixed mold and the mold coupling part, and a fixed key is inserted into the key groove.

The molten metal ejection unit includes an injection cylinder body rotating about the rotation shaft, a lifting base having a molten metal sleeve accommodating the molten metal thereon, and molten metal protruding from the injection cylinder body by hydraulic pressure and accommodated in the molten metal sleeve. a plunger for pushing upward, two lifting cylinder parts positioned on both sides of the plunger to vertically move the lifting base, and a booster cylinder coupled to the injection cylinder body to increase the injection pressure acting on the plunger including wealth,

The inside of the injection cylinder body and the inside of the booster cylinder part are connected by a flow path, and the booster piston provided in the booster cylinder reciprocates in a direction perpendicular to the reciprocating direction of the plunger.

A guide block is mounted on the elevating cylinder unit, and a guide bar moving along the guide block is mounted on the elevating base.

A cavity is formed between the stationary mold and the movable mold that are molded to each other, and an electromagnet is located below the sprue for injecting molten metal into the cavity, and the molten metal sleeve penetrates the center of the electromagnet and enters the sprue.

The vertical injection die casting apparatus of the present invention can stably support the heavy molten metal injection part, and improve the precision of bonding with the mold for injecting the molten metal into the cavity of the mold, thereby improving the density of the molten metal inside the mold cavity. can improve

1 is a view showing the entire vertical injection type die casting apparatus according to an embodiment of the present invention.
2 is a view showing a vertical injection type die casting apparatus according to an embodiment of the present invention.
Figure 3 is a view separately showing a fixed plate according to an embodiment of the present invention.
4 is a view of the fixed platen according to the embodiment of the present invention as viewed from the direction in which the fixed mold is coupled.
5 is a view showing a state in which the fixed base and the support frame are coupled according to an embodiment of the present invention.
6 is a view separately showing a support frame according to an embodiment of the present invention.
7 is a view separately showing a molten metal injection unit according to an embodiment of the present invention.
8 is a view separately showing the lifting base and the lifting cylinder part of the molten metal injection part according to the embodiment of the present invention.
9 is a view showing the operating structure of the lifting cylinder according to the embodiment of the present invention.
10 is a view showing a state in which the molten metal injection unit is rotated and tilted according to an embodiment of the present invention.
11 is a view schematically showing the structure of a conventional vertical injection type die casting apparatus.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a view showing the entire vertical injection-type die-casting apparatus according to an embodiment of the present invention, and FIG. 2 is a view separately showing only the main components of the vertical injection-type die-casting apparatus of FIG. 1 . 4 is a view of the fixed surface of FIG. 3 viewed from the left. Figure 6 (a) is a view of the support frame of the present invention viewed from the top, Figure 6 (b) is a view of the support frame of Figure 5 viewed from the right.

In the vertical injection die casting apparatus according to an embodiment of the present invention, as shown in FIGS. 1 to 10 , a fixed mold 200 , a movable mold 300 , and a fixed platen 400 are installed on the upper part of the main frame 100 . and the support frame 500 and the molten metal injection part 600 are installed at the lower part of the fixed plate 400 .

The main frame 100 is a basic frame structure, and various necessary devices in addition to the stationary mold 200 , the movable mold 300 , and the stationary plate 400 may be installed.

As shown in FIG. 2 , the fixed plate 400 is installed on the main frame 100 . The fixed platen 400 includes a mold coupling part 410 and two frame coupling parts 420 . The mold coupling part 410 is mounted on the main frame 100 . And as shown in FIG. 3 , the frame coupling part 420 is formed to extend in the horizontal direction under the mold coupling part 410 . In FIG. 3 , the frame coupling part 420 is formed to protrude from the lower part of the mold coupling part 410 to the left. The two frame coupling parts 420 are formed to be spaced apart from each other, and the molten metal injection part 600 rises and enters the space between the two frame coupling parts 420 .

The fixed mold 200 is coupled to the mold coupling part 410 . 3 to 4 , a keyway 411 is formed between the fixed mold 200 and the mold coupling part 410 . A fixed key (not shown) is inserted into the keyway 411 . The fixed mold 200 and the mold coupling part 410 are coupled by a separate fastening member (not shown), and the co-junkey acts upward by the molten metal injection part 600 from the lower part of the stationary mold 200 . to counter pressure. The fixed mold 200 forms a cavity in which the molten metal is filled by forming a mold with the moving mold 300 that moves horizontally.

3 to 4 , the support block 421 is mounted on the main frame 100 . The support block 421 is integrally formed with the main frame 100 by welding. The support block 421 supports the end of the frame coupling part 420 protruding from the mold coupling part 410 from the bottom. As such, the support block 421 supports the end of the frame coupling part 420 from the lower part, and as the load of the molten metal injection part 600 acts on the frame coupling part 420 , the comfortable load generated on the fixed platen 400 . offset the middle.

As shown in FIG. 5 , the support frame 500 is detachably coupled to the lower portion of the fixed plate 400 . Specifically, the support frame 500 is detachably coupled to the lower portion of the frame coupling part 420 . The support frame 500 includes two vertical frames 510 and a horizontal frame 520 connecting the two vertical frames 510 as shown in FIG. 6 . The vertical frame 510 is detachably coupled to the lower portion of the frame coupling unit 420 . Between the two vertical frames 510, the molten metal injection unit 600 is rotatably coupled. The support frame 500 is coupled to the lower portion of the frame coupling unit 420 to stably support the molten metal injection unit 600 , and has a structure separable from the frame coupling unit 420 . Easy to maintain and repair.

11 is a diagram schematically showing the structure of a conventional vertical injection type die casting apparatus. The conventional vertical injection type die casting apparatus as shown in FIG. 11 has a structure in which a fixed platen integrally formed to support the molten metal injection part, and to be applied to the 1250Ton class, it is disadvantageous to casting due to an increase in the size of the fixed platen itself, and the volume is large. As an integrated structure with a heavy weight, there is a disadvantage in transport and processability. In addition, there is a difficulty in the maintenance and installation and dismantling of the surrounding facilities including the fixed plate. Due to these problems of the prior art, it was difficult to apply the prior art to the vertical injection type die casting apparatus as it is. Accordingly, the vertical injection type die casting apparatus of the present invention manufactures the fixed base 400 and the support frame 500 supporting the molten metal injection unit 600 in a separate structure, thereby forming the support frame 500 and the molten metal injection unit 600. It can be separated from the fixed plate 400, so maintenance is easy.

As shown in FIG. 5 , a tilting stopper 511 is mounted on the vertical frame 510 . The tilting stopper 511 limits the rotation of the molten metal ejecting part 600 so that the position of the molten metal sleeve 621 formed in the molten metal ejecting part 600 and the sprue position of the cavity coincide in the vertical direction. That is, when the molten metal injection unit 600 rotates and stands upright at the lower part of the mold, the molten metal injection unit 600 is stopped so that the molten metal sleeve 621 of the molten metal injection unit 600 is accurately positioned under the sprue of the cavity. The tilting stopper 511 can be expanded and contracted to change the stop position of the molten metal ejection unit 600 .

Molten metal is filled between the fixed mold 200 and the movable mold 300 to be molded to each other to form a cavity in which the product is molded, and an electromagnet 530 is located at the bottom of the sprue for injecting the molten metal into the cavity. The electromagnet 530 may be installed under the fixed mold 200 or the movable mold 300 , and is located under the sprue. These electromagnets 530 are located around the path in which the molten metal sleeve 621 moves up and down, and when the molten metal sleeve 621 rises and enters the sprue, the molten metal contained in the molten metal sleeve 621 is electronically stirred. do. Accordingly, the molten metal sleeve 621 penetrates the center of the electromagnet 530 and enters the sprue.

The molten metal injection unit 600 injects the molten metal into the cavity of the mold located on the upper part. The molten metal ejection unit 600 is rotatably mounted on the support frame 500 about the rotation shaft 611 .

As shown in FIG. 7 , the molten metal injection unit 600 includes an injection cylinder body 610 , an elevating base 620 , a plunger 630 , an elevating cylinder unit 640 , and a booster cylinder unit 650 . The injection cylinder body 610 may rotate about a rotation shaft 611 . The lifting base 620 is formed with a molten metal sleeve 621 in which the molten metal is accommodated in the upper portion. The plunger 630 protrudes from the injection cylinder by hydraulic pressure and pushes the molten metal accommodated in the molten metal sleeve 621 upward. Accordingly, the molten metal accommodated in the molten metal sleeve 621 is filled into the cavity through the sprue.

As shown in FIG. 8 , the lifting cylinder 640 is positioned on both sides around the plunger 630 to vertically move the lifting base 620 . The two elevating cylinder units 640 are mounted on the injection cylinder body 610 to vertically move the elevating base 620 from both sides. And each guide block 641 is mounted on the lifting cylinder unit 640 . In addition, guide bars 622 moving along the guide block 641 are mounted on both sides of the elevating base 620 . The two guide bars 622 are positioned to be symmetrical to each other around the molten metal sleeve 621 located in the center of the elevating base 620, and as shown in FIG. 9, the elevating base 620 is attached to the two elevating cylinders. By maintaining the balance of both sides of the elevating base 620 when moving vertically by the elevating base 620, the lifting height of both sides of the elevating base 620 is prevented from being changed or distorted. As described above, the guide block 641 and the guide bar 622 guide the vertical movement of the elevating base 620 so that the positions of the molten metal sleeve 621 and the sprue do not shift and exactly match.

The booster cylinder unit 650 is coupled to the injection cylinder body 610 to increase the injection pressure acting on the plunger 630 . 7, the inside of the booster cylinder and the inside of the injection cylinder body 610 are connected by a flow path, and the booster piston 651 provided inside the booster cylinder is perpendicular to the reciprocating direction of the plunger 630. reciprocating in the direction That is, in FIG. 7 , the plunger 630 reciprocates in the vertical direction, and the booster piston 651 reciprocates in the left and right direction. When the molten metal is injected into the cavity, the plunger 630 rises in the vertical direction, and the booster piston 651 presses the hydraulic oil in the horizontal direction to deliver the pressure oil into the injection cylinder body 610 through the flow path. The injection pressure acting on the The booster cylinder unit 650 protrudes from the lower portion of the injection cylinder body 610 in a horizontally long shape. The booster cylinder unit 650 having this structure can prevent interference with the support frame 500 when the molten metal injection unit 600 rotates about the rotation shaft 611 . In addition, since a cover 652 capable of opening and closing the inside of the crushed cylinder unit is mounted at an end of the booster cylinder unit 650 , the repair of the booster cylinder unit 650 is easy.

Hereinafter, the operation process of the vertical injection type die casting apparatus according to an embodiment of the present invention will be described in detail.

In the initial preparation state, the molten metal injection unit 600 is in an upright and descending state, and the cavity of the mold is open. Thereafter, the molten metal ejection unit 600 is rotated and tilted about the rotation shaft 611 by the cylinder device, and the molten metal is injected into the molten metal sleeve 621 .

After the molten metal injection into the molten metal sleeve 621 is completed, the molten metal ejection unit 600 is rotated by the cylinder device to stand upright again. At this time, the molten metal injection unit 600 is stopped by the tilting stopper 511 mounted on the vertical frame (510). The molten metal sleeve 621 is positioned under the sprue to exactly match the sprue position of the cavity by the tilting stopper 511 . If the positions of the molten metal sleeve 621 and the sprue do not coincide vertically, the stop position of the molten metal ejecting unit 600 may be adjusted by adjusting the length of the tilting stopper 511 . In addition, the movable mold 300 is moved in the direction in which the stationary mold 200 is located, so that the stationary mold 200 and the movable mold 300 are mold-closed.

The mold is closed, and in a state in which the molten metal injection unit 600 is upright, the elevating base 620 is raised by the elevating cylinder unit 640 . Accordingly, the molten metal sleeve 621 enters the sprue and docks with the mold. As described above, the lifting base 620 on which the molten metal sleeve 621 is formed is moved upwardly toward the sprue of the cavity by the guide block 641 and the guide bar 622 on both sides without movement deviation. When the molten metal sleeve 621 enters the sprue and is completely in close contact with the mold, the plunger 630 rises by the hydraulic pressure inside the injection cylinder body 610 to push the molten metal of the molten metal sleeve 621 into the cavity. When the injection of the molten metal by the hydraulic pressure inside the injection cylinder body 610 is completed, the booster cylinder unit 650 operates to increase the pressure of the plunger 630 for pushing the molten metal into the cavity. In addition, the booster cylinder unit 650 maintains the pressure of the plunger 630 for pushing the molten metal into the cavity until the molten metal is hardened. Accordingly, the molten metal in the molten metal sleeve 621 is completely transferred to the cavity, and the molten metal is hardened inside the cavity while the pressure of the plunger 630 pushing the molten metal is maintained.

When the molten metal filled in the cavity is hardened, the lifting base 620 is lowered by the lifting cylinder unit 640 , and the movable mold 300 is moved to open the cavity. Thereafter, the product is taken out from the movable mold 300 .

The vertical injection die-casting apparatus according to the present invention is not limited to the above-described embodiment and can be implemented with various modifications within the scope of the technical spirit of the present invention.

100: mainframe,
200: fixed mold,
300: moving mold,
400: fixed plate,
410: mold coupling part,
411: keyway,
420: frame coupling part,
421: support block,
500: support frame,
510: vertical frame,
511: tilting stopper,
520: horizontal frame,
530: electromagnet;
600: molten metal injection part,
610: injection cylinder body,
611: axis of rotation;
620: elevating base,
621: molten metal sleeve,
622: guide bar,
630: plunger,
640: elevating cylinder unit,
641: guide block,
650: booster cylinder unit,
651: booster piston,
652: cover,

Claims (7)

a fixed platen to which a fixed mold forming a cavity is formed by forming a moving mold;
a main frame to which the fixed surface plate is coupled;
a support frame detachably coupled to a lower portion of the fixed plate;
a molten metal ejection unit rotatably mounted on the support frame about a rotation axis and injecting molten metal into the cavity located on the upper portion;
It includes a tilting stopper for limiting the rotation of the molten metal injection part,
The fixed platen includes a mold coupling part mounted on the main frame and coupled to the fixed mold, and two frame coupling parts extending in the horizontal direction from the lower part of the mold coupling part,
The support frame is composed of two vertical frames detachably coupled to the lower portion of the frame coupling unit and positioned on both sides around the molten metal injection unit, and a horizontal frame connecting the two vertical frames,
The molten metal ejection unit includes an injection cylinder body rotating about the rotation shaft, a lifting base having a molten metal sleeve accommodating the molten metal thereon, and molten metal protruding from the injection cylinder body by hydraulic pressure and accommodated in the molten metal sleeve. a plunger for pushing upward, two lifting cylinder parts positioned on both sides of the plunger to vertically move the lifting base, and a booster cylinder coupled to the injection cylinder body to increase the injection pressure acting on the plunger including wealth,
The inside of the injection cylinder body and the inside of the booster cylinder are connected by a flow path, and the booster piston provided in the booster cylinder reciprocates in a direction perpendicular to the reciprocating direction of the plunger,
The tilting stopper can expand and contract to change the stop position of the molten metal injection part, and restrict the rotation of the molten metal injection part so that the position of the molten metal sleeve formed in the molten metal injection part and the sprue position of the cavity coincide in the vertical direction Vertical injection type die casting device. The method according to claim 1,
The vertical injection-type die casting apparatus, which is mounted on the main frame, and further comprises a support block for supporting the end of the frame coupling part protruding from the mold coupling part from the bottom. delete The method according to claim 1,
A vertical injection type die casting apparatus, characterized in that a key groove is formed between the fixed mold and the mold coupling part, and a fixed key is inserted into the key groove. delete The method according to claim 1,
A guide block is mounted on the lifting cylinder part,
The vertical injection type die casting apparatus, characterized in that the guide bar moving along the guide block is mounted on the elevating base. The method according to claim 1,
A cavity is formed between the fixed mold and the moving mold that are molded to each other, and an electromagnet is located below the sprue for injecting molten metal into the cavity. Vertical injection type die-casting device.

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