KR101723656B1 - malfunction prevention method of open and close valve in degassing device for die casting - Google Patents

malfunction prevention method of open and close valve in degassing device for die casting Download PDF

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Publication number
KR101723656B1
KR101723656B1 KR1020150092371A KR20150092371A KR101723656B1 KR 101723656 B1 KR101723656 B1 KR 101723656B1 KR 1020150092371 A KR1020150092371 A KR 1020150092371A KR 20150092371 A KR20150092371 A KR 20150092371A KR 101723656 B1 KR101723656 B1 KR 101723656B1
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South Korea
Prior art keywords
path
closing valve
valve
molten metal
closing
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KR1020150092371A
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Korean (ko)
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KR20160037735A (en
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성옥순
채원재
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가부시키가이샤 제팬몰드트레이드
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/14—Machines with evacuated die cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/14—Machines with evacuated die cavity
    • B22D17/145—Venting means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Details Of Valves (AREA)

Abstract

The present invention relates to a die-casting gas removing device that prevents fine dust or the like from adhering to a sliding portion of a closing valve, enables smooth operation of the gas removing device over a long period of time, And a method for preventing malfunction of the opening / closing valve.
At least a bypass path 32 is provided on the side of the closing valve 5 in the degassing path 3 of the degassing apparatus for degassing by the vacuum suction apparatus and the molten metal passing through the bypass path 32 Closing valve 5 later than the molten metal passing through the main path 31 to prevent malfunction of the on-off valve. It is preferable that the main path 31 is provided with a bending portion and the bypass path 32 is provided across the movable block 2 and the fixed block.

Description

[0001] The present invention relates to a method for preventing malfunction of an open / close valve in a die-casting gas removing apparatus,

The present invention relates to a die-casting gas removing device for sucking a gas generated when a molten metal enters a cavity together with air by a vacuum suction device and discharging the gas to the outside through the gas removing path, ≪ / RTI >

1, a gas removal path 3 communicating with a cavity is provided between a fixed block 1 and a movable block 2, and a gas removal path 3 is formed in the fixed block 1, A hydraulic valve 4 disposed at the inlet side of the path 3, a closing valve 5 disposed at the outlet side, an opening and closing lever 6 for transmitting the operation of the hydraulic valve 4 to the closing valve 5, (7) for pressing the open / close lever (6) in the closing direction of the closing valve (5) in the initial operation in which the mold is cooled, And an extruding pin (not shown) for extruding a surplus material such as aluminum solidified in the gas removing path 3 when the die is opened.

7, the conventional gas removing path 3 includes a main path 31 connected to the closing valve 5 from the water pressure valve 4 and a connecting path 34 communicating with the cavity have. Therefore, when casting is started, the molten metal enters a cavity (not shown) and gas is generated. The gas and the air in the cavity are sucked by the vacuum suction device and are removed to the outside through the gas removing path 3, and the cavity is filled with the molten metal. Thereafter, when the molten metal enters the degassing path (3) from the inlet side of the degassing device in communication with the cavity, the molten metal pressure is applied to the upper surface of the hydraulic valve (4). Then, the hydraulic pressure valve 4 is depressed downward, and the closing valve 5 is closed through the opening / closing lever 6. Before the gas is closed, the gas is exhausted. Aluminum or the like other than the gas is not exhausted but has a mechanism which is stopped in front of the closing valve 5.

At this time, the hydraulic valve 4 receiving the pressure of the molten metal coming from the inlet side of the gas removing device communicating with the cavity and the closing valve 5 closing the opening and closing lever 6 are connected to both valves 4, When the fine dust enters the clearance between the both sliding portions, the movement of both the valves 4 and 5 is deteriorated, and at the same time, the movement of the hydraulic valve 4 The movement is delayed and the closing function of the closing valve 5 is lowered. In addition, if the molten metal enters the closing valve 5 due to the advancing phenomenon of the molten metal before the closing valve 5 is closed, a failure occurs and the casting operation is stopped. In addition, since the molten metal becomes low in temperature while the molten metal reaches the gas removing device communicating with the cavity through the cavity, and the molten metal having a low temperature tends to adhere to the metal, both sliding portions of the hydraulic valve 4 and the closing valve 5 It is easy for the sticking phenomenon to occur, and when the sticking part enters into the gap of the both sliding parts, a malfunction occurs, so the casting operation is interrupted every time and the aluminum that has entered has to be removed. When fine dust or the like enters from the sliding portion of the closing valve 5 into a vacuum suction device (not shown), the vacuum suction device itself fails and the filter is clogged, so that the casting operation must be temporarily stopped .

Therefore, it is necessary to clean the outer circumferential surface of both the valves 4 and 5 and the hole portion of the fixed block 1 side after disassembling the gas removing device every time the casting is started, which is troublesome. The life of both the valves 4 and 5 is shortened so that it is necessary to periodically exchange both the valves 4 and 5 and the fixed block 1 side and the like and the productivity of the die- Costs are rising due to administrative expenses.

Particularly, when minute dust or the like is adhered to the sliding portion of the closing valve 5, the closing valve 5 is not completely closed even if the hydraulic valve 4 is operated, and the clogging of the filter of the vacuum suction apparatus or the vacuum suction There is a problem that a failure of the device itself tends to occur.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Unexamined Patent Publication No. 2002-96151

[Patent Document 2] Japanese Patent Application Laid-Open No. 2002-144008

The present invention relates to a die-casting gas removing device capable of preventing fine dust or the like from adhering to a sliding portion of a closing valve so that operation of the gas removing device can be smoothly performed over a long period of time, productivity is improved, And a method for preventing malfunction of the opening / closing valve.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems, and it is an object of the present invention to provide a vacuum degassing apparatus for a vacuum degassing apparatus, Is low and the temperature of the molten metal containing fine dust passes through the main path is high and reaches the closing valve later than the good quality molten metal to prevent the malfunction of the opening / closing valve. It is also preferable that the main path be provided with a bending portion, and the bypass path is provided across the movable block and the fixed block. Alternatively, the bypass path may be a closed path. In the present invention, the term "closed path" refers to a path where the molten metal solidifies and becomes a pouring basin.

The gas removing path 3 is at least composed of the main path 31 connecting the hydraulic valve 4 to the closing valve 5 and the bypass path 32 provided on the closing valve 5 side , The molten metal having a low temperature passing through the bypass path 32 and containing fine dust has a low temperature passing through the main path 31 and a longer time to reach the closing valve 5 than a good quality molten metal, Fine dust such as aluminum is prevented from entering the respective sliding portions of the hydraulic valve 4 and the closing valve 5 and in particular it is possible to prevent fine dust from entering the sliding portion of the closing valve 5 The closing valve 5 can be completely closed and closed, and the malfunction of the hydraulic valve 4 and the closing valve 5 hardly occurs, and at the same time, ≪ / RTI > It is unnecessary to disassemble and clean the gas removing device that has been lagging, to regularly inspect each part and replace the parts, to remove aluminum or fine dust that has entered the gap of the sliding part, and to avoid the trouble of the expensive vacuum suction device and the clogging of the filter Almost eliminated.

Since the bent portion 33 is provided in the main path 31 and the pressure (kinetic energy) of the molten metal passing through the main path 31 is reduced, the time required for the molten metal to reach the closing valve 5 becomes longer The closing of the closing valve 5 is almost perfect, so that the operation of the gas casting device for removing the casting can be smoothly performed for a long time, and the productivity of the casting die can be improved and the cost can be reduced. And the life of the hydraulic valve 4 and the closing valve 5 becomes longer.

Since the bypass path 32 is provided across the fixed block 1 and the movable block 2 to increase the length of the bypass path 32 as shown in claim 3, The time required for the molten metal containing fine dust to reach the closing valve 5 is longer than the temperature of the molten metal having a high temperature passing through the main path 31 and the minute dust such as aluminum is supplied to the closing valve 5 ). Therefore, it is possible to prevent malfunction of the hydraulic valve 4 and the closing valve 5.

By making the bypass path 32 a closed path as shown in claim 4, it is possible to prevent the molten metal having a low temperature passing through the bypass path 32 and containing fine dust from reaching the closing valve 5, Fine dust such as aluminum does not enter the clearance of the closing valve 5 at the time of casting and the prevention of malfunction of the opening and closing valves of the hydraulic valve 4 and the closing valve 5 is almost complete will be.

According to the present invention, it is possible to prevent the adhesion of fine dust or the like to the sliding portion of the closing valve, so that the operation of the gas removing device can be smoothly performed over a long period of time, It is possible to prevent the malfunction of the opening / closing valve in the apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an explanatory view showing a main part of an embodiment of a gas removing apparatus used in the method of the present invention. Fig.
Fig. 2 is an explanatory view showing the gas removing path of the present embodiment. Fig.
3 is an explanatory view showing a gas removing path according to another embodiment.
4 is an explanatory view showing a gas removing path according to still another embodiment.
Fig. 5 is an explanatory view showing a state in which the molten metal flows and coagulates in the gas removing path shown in Fig. 3;
Fig. 6 is an explanatory diagram showing the action of the gas removing path of the present embodiment. Fig.
7 is an explanatory view showing a conventional gas removing path

Fig. 1 is an explanatory view showing an example of a gas removing apparatus used in the method of the present invention, and the numbers in this drawing will be described. (1) is a fixed block for die casting, and (2) is a movable block.

The gas removing path 3 is formed between the fixed block 1 and the movable block 2 and communicates with the cavity. The gas removing path 3 is formed by a water pressure valve A bypass path 32 provided on the side of the closing valve 5 and a connecting path 32 communicating with the cavity are formed on the upper surface side of the closing valve 5 34). The bypass path 32 is arranged to allow the molten metal to pass through the main path 31 and reach the closing valve 5, and the length and width of the bypass path 32 are appropriately adjusted. The length of the bypass path 32 is longer than that of the main path 31 and the distance (length) is increased by bending the path in the vertical direction as shown in Fig. At this time, a portion of the bypass path 32 left as white paper is formed on the movable block 2 side, and a black dot portion is formed on the fixed block 1 side.

(4) is a water pressure valve disposed on the inlet side of the gas removal path (3), and this water pressure valve (4) is disposed in the fixed block (1) and is movable up and down. (5) is a closing valve disposed on the outlet side of the gas removing passage (3). The closing valve (5) is disposed in the fixed block (1) and is movable up and down. And a discharge path communicating with the outlet side of the fixed block 1 from the upper center of the closing valve 5 may be provided. The structure for closing and opening the gas removing path 3 by the closing valve 5 is not limited to the above, and other structures may be employed. Further, an air pocket may be formed by cutting a part of each of the outer circumferential surfaces of the hydraulic valve 4 and the closing valve 5 as shown in Fig.

(6) is a swingable opening / closing lever provided for transmitting the operation of the hydraulic valve (4) to the closing valve (5). (7) is an opening means for lifting the opening and closing lever (6). A coil spring may be used as the opening means (7). The opening means 7 is for pressing the opening / closing lever 6 in the opening direction of the closing valve 5 to open the closing valve 5. The opening means 7 is not limited to the coil spring, but an air cylinder or the like may be used. (8) is a closing means for forcing the opening / closing lever (6) in the closing direction of the closing valve (5) in the initial operation.

3 is a view showing a gas removing path of another embodiment, which differs from the above embodiment in the main path 31 of the gas removing path 3. That is, the bent portion 33 is provided at the middle portion of the main path 31. The bent portion 33 is provided in a crank shape as shown in the figure, but may have a different shape. The bending portion 33 has a longer path than the conventional one to reduce the pressure of the molten metal, that is, the kinetic energy, thereby delaying the time until reaching the closing valve 5.

Fig. 4 is a view showing a degassing path of another embodiment, which differs from the bypass path 32 of the degassing path 3 in comparison with Fig. That is, the intermediate portion of the bypass path 32 is not connected to the closing valve 5, and the bypass path 32 is composed of a closed path. The molten metal in the bypass path 32 becomes an injection hole.

Next, a method for preventing malfunction of the open / close valve of the present invention will be described. Initially, when the casting is started, the molten metal enters a cavity (not shown) to generate gas, and is discharged to the exhaust side together with the air in the cavity, and the cavity is filled with the molten metal. Thereafter, the molten metal enters from the inlet side of the movable block 2 as shown in the arrows in the drawing of Fig. The molten metal first enters the gas removal path 3 and at the same time the molten metal pressure is applied to the upper surface of the hydraulic valve 4. [ Then, the hydraulic pressure valve 4 is depressed downward, and the hydraulic pressure valve 4 is lowered, so that the closing valve 5 is pushed through the opening / closing lever 6. At this time, the molten metal introduced from the inlet side of the movable block 2 is closed by the closing valve 5 before the molten metal reaches the outlet side, and the molten metal flows out from the outlet side of the fixed block 1 Things will be gone. This is the same as the conventional method.

Here, the flow of the molten metal in the gas removing path 3 will be described in detail. First, the molten metal first flows into the connecting path 34, passes through the main path 31 in two directions on the upper surface of the hydraulic valve 4, reaches the upper surface of the closing valve 5 from both sides, When the timing of closing of the closing valve 5 is delayed, there is a possibility that fine dust enters the inside of the closing valve 5 together with the exhaust gas when the temperature of the molten metal entering the line is low and the minute entering dust containing fine dust is late. It occurred in the product. However, in the method of the present invention, a high-temperature, high-quality molten metal reaches the upper surface of the closing valve 5 before the minute dust enters the inside of the closing valve 5, and completely closes the upper valve completely to prevent infiltration of fine dust It is to be done. In other words, as shown by the arrows in Fig. 6, the line entry molten metal having a low temperature at the head toward the closing valve 5 and having fine dust flows straight without passing through the main path 31 as shown by the dotted arrow, 5 and 6 (b), alternately passes between the side of the movable block 2 and the side of the fixed block 1, and then reaches the closing valve 5. Therefore, as shown by the dotted arrows, the main path 31 is heated to a temperature lower than the high-temperature and high-quality molten metal by the bypass path 32 through the bypass valve 5, Since it is late to arrive at the valve 5, the leading end of the molten metal comes after the close valve 5 is reliably closed, so that fine dust is prevented from adhering to the sliding portion of the close valve 5, (5) does not occur. In addition, since the temperature of the by-pass path 32 is low and the fine inclusions of the molten metal are passed through, the molten metal itself is reduced. Even if the casting was continued for one week, the closure of the closing valve 5 hardly occurred. 6 (a) is a view showing a state in which the molten metal flows through the bypass path 32 in the present invention, and Fig. 6 (b) is a view showing the side surface of Fig.

By providing the bent portion 33 as shown in Fig. 3 in the main path 31, the pressure (kinetic energy) of the molten metal is reduced and the speed is slowed each time the molten metal is turned on the bent portion 33, The time required for the molten metal to pass through the main path 31 is longer than that of the conventional one, because the molten metal is zigzag bent with respect to the conventional linear flow. This increases the area of the molten metal to increase the amount of the molten metal and increases the temperature on the side of the movable block 2 to maintain the molten metal at a high temperature and the phenomenon that the molten metal sticks to the open / close valves 4 and 5 decreases . It has been confirmed by the present inventors that the temperature of the molten metal at this time can be maintained at about 100 캜 higher than the conventional one.

1 fixed block
2 movable block
3 degassing path
31 Main path
32 bypass path
33 Bending section
4 Hydraulic Valve
5 closing valve
6 Opening Levers
7 opening means
8 closure means

Claims (4)

A hydraulic valve 4 disposed on the inlet side, a closing valve 5 disposed on the outlet side, and a gas removing passage 3 communicating with the cavity between the fixed block 1 and the movable block 2, An opening and closing lever 6 for transmitting the operation of the hydraulic valve 4 to the closing valve 5, an opening means 7 for pressing the closing valve 5 in the opening direction, And a closing means (8) for closing the closing valve (5) in the closing direction of the valve (5), wherein in the method for preventing malfunction of the hydraulic valve (4) or the closing valve (5)
The gas removing path 3 is at least composed of a main path 31 connecting the hydraulic valve 4 to the closing valve 5 and a bypass path 32 provided on the closing valve 5 side ,
And the molten metal passing through the bypass path (32) is delayed from reaching the closing valve (5) more than the molten metal passing through the main path (31). In the diecasting gas removing apparatus, How to prevent malfunction. 2. The die-casting gas removing apparatus according to claim 1, wherein the main path (31) is provided with a bent portion (33) and the pressure of the molten metal passing through the main path (31) How to prevent. The method according to claim 1, wherein the bypass path (32) is provided across the fixed block (1) and the movable block (2). The method according to claim 1 or 3, wherein the bypass path (32) is a closed path without being connected to the closing valve (5).
KR1020150092371A 2014-09-29 2015-06-29 malfunction prevention method of open and close valve in degassing device for die casting KR101723656B1 (en)

Applications Claiming Priority (2)

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JPJP-P-2014-198134 2014-09-29
JP2014198134A JP6408845B2 (en) 2014-09-29 2014-09-29 Method for preventing malfunction of open / close valve in degassing device for die casting

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KR101723656B1 true KR101723656B1 (en) 2017-04-05

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107321956B (en) * 2016-04-29 2019-06-11 长城汽车股份有限公司 Die casting vacuum valve
CN108253181A (en) * 2018-01-12 2018-07-06 江苏远洋阀门智控股份有限公司 A kind of vaccum stop valve
KR20190130233A (en) * 2018-05-14 2019-11-22 가부시키가이샤 제팬몰드트레이드 Malfunction prevention device of open and close valve for die casting
CN108480596B (en) * 2018-05-22 2020-03-31 宁波北仑益鸣企业管理服务有限公司 Vacuum valve air exhaust device for die casting die

Citations (2)

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Publication number Priority date Publication date Assignee Title
JP4519304B2 (en) * 2000-11-06 2010-08-04 株式会社ダイエンジニアリング Degassing method and die-casting device in mold
JP2011183406A (en) 2010-03-05 2011-09-22 Japan Mold Trade:Kk Cooler-installed degassing apparatus for die casting

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JPS6117350A (en) * 1984-06-30 1986-01-25 Fuso Light Alloys Co Ltd Die of die casting machine
JP3508014B2 (en) * 1998-07-21 2004-03-22 巖 森川 Degassing device for mold casting
JP2001047187A (en) * 1999-08-04 2001-02-20 Uogishi Seiki Kogyo Kk Degassing device for die casting
CN102794430B (en) * 2011-08-29 2015-11-18 日本模具贸易株式会社 A kind of compression mod exhaust apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4519304B2 (en) * 2000-11-06 2010-08-04 株式会社ダイエンジニアリング Degassing method and die-casting device in mold
JP2011183406A (en) 2010-03-05 2011-09-22 Japan Mold Trade:Kk Cooler-installed degassing apparatus for die casting

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JP2016068101A (en) 2016-05-09
KR20160037735A (en) 2016-04-06

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