EP2977127A1 - Gussvorrichtung - Google Patents

Gussvorrichtung Download PDF

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Publication number
EP2977127A1
EP2977127A1 EP13878814.6A EP13878814A EP2977127A1 EP 2977127 A1 EP2977127 A1 EP 2977127A1 EP 13878814 A EP13878814 A EP 13878814A EP 2977127 A1 EP2977127 A1 EP 2977127A1
Authority
EP
European Patent Office
Prior art keywords
cavity
molten metal
pressurizing
pressurizing chamber
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13878814.6A
Other languages
English (en)
French (fr)
Other versions
EP2977127A4 (de
Inventor
Hiroto Sasaki
Hiroaki Miyoshi
Haruo Akemoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Machinery Corp Ltd
Original Assignee
Ube Machinery Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51175757&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2977127(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ube Machinery Corp Ltd filed Critical Ube Machinery Corp Ltd
Publication of EP2977127A1 publication Critical patent/EP2977127A1/de
Publication of EP2977127A4 publication Critical patent/EP2977127A4/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/067—Venting means for moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/08—Controlling, supervising, e.g. for safety reasons
    • 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

Definitions

  • the present invention relates to a casting device.
  • Patent Literature 1 a gate piston pin is opened after making a molten metal side to positive pressure and a cavity side to negative pressure. Therefore, the molten metal may be splashed at the moment of opening the gate piston pin due to the pressure difference, thereby causing a flow mark and cold shut in a molded object. In other words, there may be a problem in which quality of the molded object is deteriorated.
  • Patent Literature 1 JP 5-146864 A
  • the present invention is made considering the above-described situation, and directed to providing a casting device capable of improving quality of a casting product by preventing molten metal from being splashed.
  • the casting device includes a die, a pressurizing chamber, a stalk, a pressurizing means, a depressurizing means, and a control device.
  • the die is formed with a cavity including an opening at a lower portion thereof.
  • the pressurizing chamber is disposed below the die, and contains molten metal, and further is formed with a sealed space above the molten metal.
  • the stalk formed in a cylindrical shape has an upper end opening communicating with the opening of the cavity, and a lower end opening immersed into the molten metal contained inside the pressurizing chamber.
  • the pressurizing means pressurizes the inside of the pressurizing chamber by supplying a gas to the sealed space of the pressurizing chamber.
  • the depressurizing means depressurizes the inside of the cavity by discharging the gas from the cavity.
  • the control device when the molten metal is provided to the cavity from the pressurizing chamber, pressurizes the inside of the pressurizing chamber by the pressurizing means until the molten metal reaches the opening of the cavity and depressurizes the inside of the cavity by the depressurizing means while continuing pressurizing the inside of the pressurizing chamber after the molten metal reaches the opening of the cavity.
  • the inside of the pressurizing chamber is pressurized by the pressurizing means until the molten metal reaches the opening of the cavity, and after the molten metal reaches the opening of the cavity, the inside of the cavity is depressurized by the depressurizing means while continuing pressurizing the inside of the pressurizing chamber.
  • Fig. 1 is a schematic view illustrating the casting device according to an embodiment.
  • the casting device includes a pressurizing chamber (crucible) 10 to pressurize molten metal A as illustrated in Fig. 1 .
  • a container 11 to keep the molten metal A is provided inside the pressurizing chamber 10.
  • An upper end opening of the pressurizing chamber 10 is closed with a stationary platen 12, and a sealed space is formed inside the pressurizing chamber 10.
  • the sealed space (pressurizing chamber 10) is in communication with a gas supply passage 13 and a gas discharge passage 14.
  • the gas supply passage 13 is connected to the pressurizing source 16 via a valve 15, and supplies an inert gas into the pressurizing chamber 10.
  • the gas discharge passage 14 opens the pressurizing chamber 10 to atmosphere via a valve 17.
  • An upper end of a cylindrical stalk 18 is fixed at a center of the stationary platen 12, and both ends of the stalk 18 are opened. A lower end of the stalk 18 is immersed into the molten metal A contained inside the pressurizing chamber 10.
  • a fixed die 19 is mounted on an upper surface of the stationary platen 12.
  • a movable die 21 is mounted on a lower surface of a moving platen 20 configured movable upward relative to the fixed die 19.
  • a cavity 22 is formed.
  • an opening 23a is formed at a gate portion communicating with the cavity 22, and the opening 23a is in communication with an upper end portion of the stalk 18.
  • a degassing passage 23b to degas a gas from the cavity 22 is connected to the fixed die 19, and chill vents 23c to avoid penetration of the molten metal A into the degassing passage 23b are disposed between the cavity 22 and the degassing passage 23b.
  • a gate seal pin 24, a center pressurizing pin 25, and a plurality of partial pressurizing pins 26 are mounted on the movable die 21.
  • the gate seal pin 24 is formed movable back and forth relative to the opening 23a to open and close the opening 23a.
  • the gate seal pin 24 is formed in a substantially bar-like shape.
  • the center pressurizing pin 25 is formed movable back and forth relative to a molten metal basin 27 communicating with the cavity 22 and pressurizes the inside of the cavity 22.
  • the center pressurizing pin 25 is formed in a cylindrical shape surrounding the gate seal pin 24.
  • the partial pressurizing pin 26 is formed movable back and forth relative to a molten metal basin 28 communicating with the cavity 22, and pressurizes the inside of the cavity 22.
  • the partial pressurizing pin 26 is formed in a substantially bar-like shape.
  • the gate seal pin 24 and the center pressurizing pin 25 respectively have upper end portions connected to a piston mechanism 29 as a driving means, and each one is movable in a vertical direction.
  • the partial pressurizing pin 26 has an upper end portion connected to a piston mechanism 30 as a driving means, and is movable in a vertical direction.
  • the casting device includes a vacuum device 32 connected to the degassing passage 23b via a degassing valve 31, and a controller 33.
  • the vacuum device 32 discharges the gas from the cavity 22 via the degassing valve 31 and the degassing passage 23b, and depressurizes the inside of the cavity 22.
  • the vacuum device 32 includes a vacuum tank 321, a vacuum pump 322 to perform vacuum drawing in the vacuum tank 321, and a motor 323 to drive the vacuum pump 322.
  • the controller 33 controls the valve 15 and the pressurizing source 16 to pressurize the inside of the pressurizing chamber 10.
  • the controller 33 controls the valve 17 to open the pressurizing chamber 10 to the atmosphere.
  • the controller 33 controls the valve 31 and the vacuum device 32 to discharge the gas contained inside the cavity 22, and depressurizes the inside of the cavity 22.
  • the controller 33 controls the piston mechanism 29 to open and close the opening 23a by the gate seal pin 24.
  • the controller 33 controls the piston mechanisms 29, 30 to pressurize the inside of the cavity 22 by the center pressurizing pin 25 and the partial pressurizing pin 26.
  • FIG. 2 is a plan view illustrating the cavity 22. As illustrated in Fig. 2 , the cavity 22 extends symmetrically in an X direction and a Y direction centering the gate seal pin 24 and the center pressurizing pin 25. In an example illustrated in Fig. 2 , six partial pressurizing pins 26 are provided in the vicinity of end portions of the cavity 22.
  • Figs. 3A to 3D are schematic views illustrating the filling operation.
  • Fig. 4 is a diagram illustrating changes of pressure P1 applied to the cavity 22 from the pressurizing source 16, pressure P2 to vacuum the cavity 22 from the vacuum device 32, and differential pressure P3 between the pressure P1 and P2 (hereinafter referred to as filling differential pressure) with passage of time.
  • the filling operation is executed based on the passage of time in the present embodiment. For example, the time when a molten metal level of the molten metal A reaches the opening 23a is preliminarily measured, and filling operation is executed based on this measured time.
  • the controller 33 first opens the valve 15 at time t11 as illustrated in Fig. 3A . Then, the controller 33 supplies an inert gas to the sealed space of the pressurizing chamber 10 from the pressurizing source 16 via the gas supply passage 13. By this, the pressure P1 applied to the pressurizing chamber 10 from the pressurizing source 16 is increased from time t11 and forth as illustrated in Fig. 4 . Therefore, the filling differential pressure P3 is increased as illustrated in Fig. 4 , thereby raising the molten metal level of the molten metal A.
  • the controller 33 continuously supplies the inert gas to the sealed space of the pressurizing chamber 10 from the pressurizing source 16 via the gas supply passage 13 even after the molten metal A reaches the opening 23a of the cavity 22 at time t12. Further, as illustrated in Fig. 3B , the controller 33 makes the cavity 22 communicate with the vacuum tank 321 by opening the valve 31. By this, the gas contained inside the cavity 22 is discharged to the vacuum tank 321 via the degassing passage 23b.
  • a sensor may be used to detect the molten metal A reaching the opening 23a of the cavity 22, or the time when the molten metal level reaches the opening 23a under a predetermined pressure is preliminarily measured and control may be executed based on this measured time.
  • the pressure P1 applied to the cavity 22 from the pressurizing source 16 is continuously increased by the control illustrated in Fig. 3B even after time 112.
  • an increasing speed of the pressure P1 is not constant depending on the shape of the cavity 22.
  • a depressurizing (vacuum) degree inside the die is increased by discharge from the cavity 22 executed by the vacuum device 32.
  • the pressure P2 applied to the cavity 22 is decreased in a minus direction as illustrated in Fig. 4 .
  • the filling differential pressure P3 is increased by the pressure P1, P2 as illustrated in Fig. 4 .
  • the controller 33 opens the valve 17 to open the pressurizing chamber 10 to the atmosphere, thereby lowing the molten metal level of the molten metal A inside the stalk 18.
  • the controller 33 may push down the center pressurizing pin 25 as illustrated in Fig. 3D and pressurize the inside of the cavity 22 so as to further increase the pressure.
  • pressurization by the partial pressurizing pin 26 may be combined as well.
  • the gate seal pin 24 and the center pressurizing pin 25 may be integrally formed, and in this case, gate closing and pressurizing are continuously operated by lowing a single cylinder. After solidification of the molten metal A inside the cavity 22, a product is taken out by moving up the movable die 21.
  • the molten metal A may rush into the cavity 22 like a jet flow, thereby causing a flow mark and cold shut in a molded object.
  • the inside of the pressurizing chamber 10 is pressurized until the molten metal A reaches the opening 23a of the cavity 22 in a state that the gate seal pin 24 is opened as described above, and pressurizing the inside of the pressurizing chamber 10 is continued after the molten metal A reaches the opening 23a of the cavity 22, while the inside of the cavity 22 is gradually depressurized as illustrated in Fig. 4 .
  • This can gradually increase the filling differential pressure P3 when the molten metal flows into the die. Therefore, according to the present embodiment, the molten metal A is prevented from being splashed and the molded object can be prevented from causing the flow mark and cold shut.
  • the pressure inside the cavity 22 is controlled by the vacuum device 32 and the pressurizing chamber 10. Therefore, the present embodiment can provide a simple structure, compared to the case of controlling the pressure inside the cavity 22 by providing a plurality of pressurizing chambers. Further, compared to the case of controlling the pressure inside the cavity 22 only by the pressurizing chamber 10, a load applied to the pressurizing chamber 10 can be reduced and airtightness of the pressurizing chamber 10 can be secured in the present embodiment.
  • Fig. 5 illustrates changes of the pressure P1 applied to the cavity 22 from the pressurizing source 16, pressure P2 of the cavity 22, and the differential pressure P3 between the pressure P1 and P2 with passage of time in a comparative example in which the vacuum device 32 is not combined.
  • a flow property of the molten metal A inside the cavity 22 can be improved because the back pressure inside the cavity 22 can be reduced by the vacuum device 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP13878814.6A 2013-03-21 2013-11-29 Gussvorrichtung Withdrawn EP2977127A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013057572A JP5527451B1 (ja) 2013-03-21 2013-03-21 鋳造装置
PCT/JP2013/082182 WO2014147892A1 (ja) 2013-03-21 2013-11-29 鋳造装置

Publications (2)

Publication Number Publication Date
EP2977127A1 true EP2977127A1 (de) 2016-01-27
EP2977127A4 EP2977127A4 (de) 2016-04-06

Family

ID=51175757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13878814.6A Withdrawn EP2977127A4 (de) 2013-03-21 2013-11-29 Gussvorrichtung

Country Status (6)

Country Link
US (1) US20160045955A1 (de)
EP (1) EP2977127A4 (de)
JP (1) JP5527451B1 (de)
KR (1) KR20150131384A (de)
CN (1) CN105073302B (de)
WO (1) WO2014147892A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900018053A1 (it) * 2019-10-07 2021-04-07 Euromac Srl Apparecchiatura e procedimento per la fusione e stampaggio allo stato semi-solido di oggetti in ottone, bronzo, leghe di alluminio, magnesio e leghe leggere e simili.
EP3127633B1 (de) * 2014-03-31 2022-05-11 Nissan Motor Co., Ltd. Giessverfahren und giessvorrichtung
WO2022112611A1 (de) * 2020-11-30 2022-06-02 Kurtz Gmbh & Co. Kg KOKILLE, VORRICHTUNG UND VERFAHREN ZUM NIEDERDRUCKGIEßEN

Families Citing this family (17)

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CN107107181B (zh) 2014-12-24 2020-05-22 日产自动车株式会社 低压铸造装置和低压铸造方法
JP6406509B2 (ja) * 2014-12-26 2018-10-17 日産自動車株式会社 鋳造装置及び鋳造方法
JP6406510B2 (ja) * 2014-12-26 2018-10-17 日産自動車株式会社 鋳造方法及び鋳造装置
US10286449B2 (en) * 2015-02-24 2019-05-14 Nissan Motor Co., Ltd. Casting device and casting method
JP6460326B2 (ja) * 2015-02-25 2019-01-30 日産自動車株式会社 鋳造装置及び鋳造方法
JP6489500B2 (ja) * 2015-02-26 2019-03-27 日産自動車株式会社 鋳造装置及び鋳造方法
CN105499513A (zh) * 2015-12-23 2016-04-20 哈尔滨工业大学 液态充填局部加压补缩铝合金汽车轮毂制造装置及其方法
CN107639221A (zh) * 2017-08-22 2018-01-30 北京北方恒利科技发展有限公司 一种双金属缸体的铸造方法
CN107321959B (zh) * 2017-09-05 2019-04-16 哈尔滨工业大学 大型船舶用铜合金螺旋桨差压铸造升液截止机构
CN108580843A (zh) * 2018-03-13 2018-09-28 中信戴卡股份有限公司 一种铝车轮连铸连锻成形工艺
CN108311668A (zh) * 2018-03-13 2018-07-24 中信戴卡股份有限公司 一种铝合金低压铸造装置及工艺
CN109047721B (zh) * 2018-10-18 2020-06-05 四川省犍为恒益铝业有限公司 一种车用箱体低压铸造模具
DE102020100701A1 (de) * 2020-01-14 2021-07-15 Audi Aktiengesellschaft Verfahren zum Herstellen einer Kraftwagenfelge aus Aluminium oder einer Aluminiumlegierung für ein Rad eines Kraftfahrzeugs sowie entsprechende Kraftwagenfelge
KR102409575B1 (ko) * 2021-12-20 2022-06-22 (주)서영 주조 품질 향상을 위한 진공 모듈 장치
IT202200026292A1 (it) * 2022-12-21 2024-06-21 Euromac Srl Apparecchiatura e procedimento per la fusione e lo stampaggio allo stato semi-solido di oggetti in metallo
KR102872415B1 (ko) * 2023-01-31 2025-10-23 디엔케이모빌리티 주식회사 고진공 다단가압 저압주조장치 및 그 방법
WO2025262651A1 (en) * 2024-06-21 2025-12-26 Colosio S.R.L. Apparatus and method for forging

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3127633B1 (de) * 2014-03-31 2022-05-11 Nissan Motor Co., Ltd. Giessverfahren und giessvorrichtung
IT201900018053A1 (it) * 2019-10-07 2021-04-07 Euromac Srl Apparecchiatura e procedimento per la fusione e stampaggio allo stato semi-solido di oggetti in ottone, bronzo, leghe di alluminio, magnesio e leghe leggere e simili.
WO2021070044A1 (en) * 2019-10-07 2021-04-15 Euromac Srl Apparatus and method for the die casting in the semisolid state of objects made of brass, bronze, alloys of aluminum, magnesium and light alloys and the like
CN114502300A (zh) * 2019-10-07 2022-05-13 优洛麦克责任有限公司 用于在由黄铜、青铜、铝合金、镁合金和轻合金等制成的物体的半固体状态下进行压铸的设备和方法
US11752546B2 (en) 2019-10-07 2023-09-12 Euromac Srl Apparatus and method for the die casting in the semisolid state of objects made of brass, bronze, alloys of aluminum, magnesium and light alloys and the like
WO2022112611A1 (de) * 2020-11-30 2022-06-02 Kurtz Gmbh & Co. Kg KOKILLE, VORRICHTUNG UND VERFAHREN ZUM NIEDERDRUCKGIEßEN

Also Published As

Publication number Publication date
JP5527451B1 (ja) 2014-06-18
WO2014147892A1 (ja) 2014-09-25
EP2977127A4 (de) 2016-04-06
CN105073302B (zh) 2017-08-08
KR20150131384A (ko) 2015-11-24
CN105073302A (zh) 2015-11-18
JP2014180696A (ja) 2014-09-29
US20160045955A1 (en) 2016-02-18

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