EP1481749A1 - Gravity casting apparatus with tilting die and method for gravity casting with tilting die - Google Patents

Gravity casting apparatus with tilting die and method for gravity casting with tilting die Download PDF

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Publication number
EP1481749A1
EP1481749A1 EP04012069A EP04012069A EP1481749A1 EP 1481749 A1 EP1481749 A1 EP 1481749A1 EP 04012069 A EP04012069 A EP 04012069A EP 04012069 A EP04012069 A EP 04012069A EP 1481749 A1 EP1481749 A1 EP 1481749A1
Authority
EP
European Patent Office
Prior art keywords
die
casting
tilting
tilting axis
inlet region
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Withdrawn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
EP04012069A
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German (de)
English (en)
French (fr)
Inventor
Fabio Giolo
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.)
IMR SpA
Original Assignee
IMR SpA
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
Application filed by IMR SpA filed Critical IMR SpA
Publication of EP1481749A1 publication Critical patent/EP1481749A1/en
Withdrawn legal-status Critical Current

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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
    • B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
    • B22D23/006—Casting by filling the mould through rotation of the mould together with a molten metal holding recipient, about a common axis
    • 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
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners

Definitions

  • the present invention relates to a gravity casting apparatus with tilting die.
  • the present invention is useful particularly but not exclusively in the production by casting of components for faucets and hydraulic connections and the like and in any case in all foundry processes that use permanent metallic dies.
  • the present invention also relates to a method for gravity casting with tilting die.
  • the process is performed by an apparatus that comprises a die-casting machine, which comprises a device for opening/closing two die parts and allows the die thus formed to tilt during casting (by gravity, while the molten mass rises in level inside the impression) about two mutually perpendicular horizontal axes.
  • a die-casting machine which comprises a device for opening/closing two die parts and allows the die thus formed to tilt during casting (by gravity, while the molten mass rises in level inside the impression) about two mutually perpendicular horizontal axes.
  • a first tilting axis is substantially parallel to the parting plane of the die; tilting about this axis allows so-called side casting, which is typically performed when the die comprises more than one impression or when filling must be performed laterally.
  • the second tilting axis is perpendicular to the parting plane of the die; tilting about this axis allows so-called front casting, which is performed typically when the die comprises a single impression.
  • the reason for tilting the die during casting is to ensure optimum casting quality.
  • the rise of the molten mass inside the impression or impressions of the die is of the laminar type, thus avoiding turbulences that may allow the absorption of air bubbles in the molten mass; laminar motion also allows a controlled rise of the molten mass, avoiding sudden thermal variations on the die and a constant cooling interval.
  • the molten mass touches the surface of the die without removing the layer of graphite (such as for example graphite applied before closing the die) that acts as a release agent and insulating agent, thus avoiding the formation of pitting and defects on the surface of the part.
  • the layer of graphite such as for example graphite applied before closing the die
  • the rise of the molten mass allows good gas evacuation.
  • an operator draws from an open-top furnace, by means of ladle, a certain quantity of molten mass and pours it into an opening (feed area) provided in the die.
  • the operator To pour the molten mass, the operator must follow the tilting of the die with the ladle, tracing a circular arc with the spout of said ladle; at the same time, the operator must rotate the ladle to empty it.
  • slag is present on the surface of the molten mass that is present in the open-top melting furnace, and the operator must not pick it up (which is not always possible) in order to avoid including it in the casting.
  • a robot in fact can be used conveniently when it is used for long production cycles, which entail mass-production of castings, something which the production market does not always require.
  • the method for casting with a low-pressure oven uses particular dies that are functionally connected to a pressurized furnace by means of a feed tube.
  • the die is arranged above the furnace, while the tube connects the center of the tank of the oven (below the level of the molten mass) to the bottom of the die, which in this process is stationary (i.e., it does not oscillate).
  • the mass rises along the tube and fills the die.
  • the aim of the present invention is to provide a gravity casting apparatus with tilting die that solves the problems noted in known types.
  • an object of the present invention is to provide a gravity casting apparatus with tilting die that allows to obtain high-quality castings.
  • Another object of the present invention is to provide a gravity casting apparatus with tilting die that allows to reduce the personnel assigned to the casting process.
  • Another object of the present invention is to provide a gravity casting apparatus with tilting die that can be produced with known technologies and systems.
  • a gravity casting apparatus with tilting die comprising at least one die-casting machine with which a corresponding die is associated, means for feeding the molten mass in the casting inlet region of said die, and means for cooling the die before the casting step, which are associated with means for distributing release agent inside at least one impression provided inside said die, said die-casting machine comprising in turn a device for opening/closing said die and means for tilting said die about at least one substantially horizontal tilting axis, said apparatus being characterized in that said at least one tilting axis substantially passes through the center of said inlet region of said die, said means for feeding the molten mass being constituted by at least one pressurized dosing furnace, which can be connected functionally to said inlet region of said die by means of a corresponding feed channel that draws from below the level of the molten mass that is present inside said pressurized furnace, the end part of said channel directly connected to said inlet region being oriented downward along the
  • the present invention comprises a method for gravity casting with tilting die that comprises the steps of:
  • the invention further comprises a die-casting machine for tilting dies, which comprises a device for opening/closing a die and means for tilting said die about at least one substantially horizontal tilting axis, said machine being characterized in that said at least one tilting axis passes substantially through the center of the casting inlet region of said die in order to feed the molten mass.
  • a gravity casting apparatus with tilting die according to the invention is generally designated by the reference numeral 10.
  • the apparatus 10 comprises a die-casting machine 11 (shown in Figures 3, 4, 5 and partially shown in Figures 6 and 7 but not in Figures 1 and 2), which will be described hereinafter and with which a corresponding die 12 is to be associated.
  • a die-casting machine 11 shown in Figures 3, 4, 5 and partially shown in Figures 6 and 7 but not in Figures 1 and 2
  • the die is of the type for front casting and is designated by the reference numeral 12a, while in Figures 2a-2e and 5 the die is of the type for side casting and is designated by the reference numeral 12b.
  • the apparatus 10 further comprises means 13 for feeding the molten mass into the casting inlet region 14 of the die 12.
  • the inlet region 14 is provided at the parting plane 12 along which the die 12 divides into two die parts 112.
  • the feeder means 13 are constituted, in this embodiment, by a pressurized dosing furnace 15, for example of the type for low-pressure casting.
  • the pressurized dosing furnace 15, during casting, is functionally connected to the inlet region 14 of the die 12 by means of a corresponding feed channel 16.
  • the feed channel 16 is constituted by a heated feed tube 17 that draws below the level of the molten mass 18 that is present inside the pressurized furnace 15.
  • the end part 19 of the feed tube 17 that is connected directly to the inlet region 14 is oriented downward, along the direction in which the molten mass is fed from the furnace 15 to the die 12, so as to achieve gravity casting into the die during the tilting of the die.
  • the apparatus 10 further comprises means 20 for cooling the die 12 before casting, which are associated with means for distributing a release agent inside the impression (or impressions, if the die is of the type with multiple impressions) formed inside the die.
  • the cooling means 20 comprise, for example, a tank 22 filled with cooling liquid (for example water), in which the die parts 112 are immersed by way of movements of the die-casting machine 11.
  • cooling liquid for example water
  • the tank 22 coincides with the release agent distribution means, since for example graphite (used indeed as a release agent) can be dispersed in the cooling liquid.
  • a die-casting machine 11 shown schematically in Figures 3, 4, 5 and partially shown in Figures 6 and 7, comprises a device 30 for opening/closing the molding die 12 and means 35 (described hereinafter) for tilting the die 12 about, in this embodiment, a pair of mutually perpendicular substantially horizontal tilting axes, respectively a first tilting axis 31 a, which is substantially parallel to the parting plane of the die 12, and a second tilting axis 31 b, which is substantially perpendicular to the parting plane of the die 12.
  • Rotation about one tilting axis 31 or the other is necessary depending on whether the casting to be performed is of the front or side type.
  • the tilting axes 31 are co-planar and pass substantially through the center of the inlet region 14 of the die 12.
  • the opening/closing device 30 comprises two mutually opposite closure units 32, of which a first one is fixed and a second one can move with respect to the first one on guiding columns 32a.
  • a respective articulation unit 33 is coupled to each closure unit 32.
  • the articulation units 33 have, on respective mutually opposite facing ends, flanges 34 for fixing to the die portions 112.
  • the articulation unit 33 which is known in principle, allows movements about two mutually perpendicular axes, which are designed to manage accessibility to the die parts 112 and their correct orientation when they are inserted in the tank 22 in order to cool them and wet them with the release agent.
  • the device 30 is pivoted about the second tilting axis 31b to an intermediate frame 36.
  • the intermediate frame 36 is pivoted to a supporting framework 37 about the first tilting axis 31b.
  • the supporting framework 37 is associated with movement means 38, which are constituted by a carriage 39 that can slide in a controlled manner on a horizontal guide 42 that is formed on the beam of a portal 43 that is fixed to the ground.
  • the movement means 38 allow the device 30 to move in a linear manner from the region of the tank 22, where the die parts 112 are cooled and the release agent is applied, to the casting region in front of the furnace 15.
  • a variation of the movement means 38 can also be constituted by a carousel that rotates the supporting framework 37 about a vertical axis.
  • the tilting means 35 comprise a first motor drive, designated schematically by the reference numeral 40, which is arranged on the intermediate frame 36 and allows the rotation of the press 30 about the axis 31b with respect to the intermediate frame 36.
  • the first motor drive 40 can be constituted for example by a gearmotor (not designated by a reference numeral in the figures), which is kinematically associated, for example by means of a chain, with a sprocket (both not designated by reference numerals in the figures), which is rigidly coupled to the press 30 and coaxial to the axis 31b, or in any case can be constituted by other movement means of a known electrical or hydraulic type.
  • a gearmotor not designated by a reference numeral in the figures
  • a sprocket both not designated by reference numerals in the figures
  • the tilting means 35 comprise a second motor drive, designated schematically by the reference numeral 41, which is arranged on the supporting framework 37 and acts on the intermediate frame 36 in order to rotate it about the first tilting axis 31a.
  • the process for gravity casting in a tilting die consists in distributing release agent onto the walls of the impression (or impressions) formed inside the open die 12.
  • the core of the casting (for example a faucet) is inserted in the impression and the die 12 is closed.
  • the molten mass is poured into the die 12 through the inlet region 14.
  • the tilting motion of the die 14 begins along a preset direction of rotation about a preset tilting axis 31, depending on whether front or side casting is being performed.
  • the casting inlet region 14 of the die 12 and the end of the feed tube 17 are moved mutually apart ( Figures 1e and 2e), and a preset solidification time, calculated according to the casting, is allowed to elapse.
  • the mold is opened, the casting is extracted and the die parts 112 are moved into the cooling tank 22 (see the die parts 112 shown in broken lines inside the tank 22 in Figures 3 and 4); since graphite is also present inside the tank, the release agent is applied simultaneously with the cooling operation, thus restarting the work cycle.
  • the apparatus described above combines the advantages of gravity casting with tilting dies (low costs of the dies and short machine setup times) and the advantages provided by molding apparatuses with low-pressure furnaces (higher quality of the produced casting).
  • the materials employed may be any according to requirements and to the state of the art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP04012069A 2003-05-27 2004-05-21 Gravity casting apparatus with tilting die and method for gravity casting with tilting die Withdrawn EP1481749A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD20030115 2003-05-27
ITPD20030115 ITPD20030115A1 (it) 2003-05-27 2003-05-27 Impianto di colata in gravita' con conchiglia di formatura

Publications (1)

Publication Number Publication Date
EP1481749A1 true EP1481749A1 (en) 2004-12-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04012069A Withdrawn EP1481749A1 (en) 2003-05-27 2004-05-21 Gravity casting apparatus with tilting die and method for gravity casting with tilting die

Country Status (2)

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EP (1) EP1481749A1 (it)
IT (1) ITPD20030115A1 (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1797980A3 (en) * 2005-12-13 2009-04-15 IMR S.p.A. Low-pressure die-casting apparatus
JP2010214423A (ja) * 2009-03-17 2010-09-30 Sukegawa Electric Co Ltd 電磁ポンプ注湯式鋳型傾斜鋳造装置と方法
CN1806962B (zh) * 2005-01-18 2012-02-29 光生铝工业株式会社 三维铸造机及三维铸造方法
CN104588625A (zh) * 2014-12-18 2015-05-06 济南圣元机械工程有限公司 具有倾转动作的重力铸造机及其倾转动作液压控制系统
CN108463298A (zh) * 2016-01-13 2018-08-28 库尔特股份有限公司 用于铸造的装置
CN110576171A (zh) * 2019-09-23 2019-12-17 溧阳市新明机械配件制造有限公司 一种砂芯生产用砂模铸造装置
CN110788309A (zh) * 2019-11-28 2020-02-14 德林智能科技有限公司 一种侧浇式重力浇铸机及其使用方法
CN112091201A (zh) * 2020-09-09 2020-12-18 许清珍 一种铸造浇注装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116765365A (zh) * 2021-12-23 2023-09-19 赵洋 一种铝水自动浇铸设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195960A (en) * 1934-08-15 1940-04-02 Morris Engineering Corp Apparatus for casting metal
DE2833569A1 (de) * 1978-07-31 1980-02-28 Engstfeld Wilh Gmbh & Co Maschine zum giessen von metallwerkstuecken, insbesondere aus aluminiumlegierungen
WO2002055237A1 (en) * 2001-01-16 2002-07-18 Sintokogio, Ltd. Gravity type tiltable metal mold casting machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195960A (en) * 1934-08-15 1940-04-02 Morris Engineering Corp Apparatus for casting metal
DE2833569A1 (de) * 1978-07-31 1980-02-28 Engstfeld Wilh Gmbh & Co Maschine zum giessen von metallwerkstuecken, insbesondere aus aluminiumlegierungen
WO2002055237A1 (en) * 2001-01-16 2002-07-18 Sintokogio, Ltd. Gravity type tiltable metal mold casting machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0186, no. 63 (M - 1723) 14 December 1994 (1994-12-14) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1806962B (zh) * 2005-01-18 2012-02-29 光生铝工业株式会社 三维铸造机及三维铸造方法
EP1797980A3 (en) * 2005-12-13 2009-04-15 IMR S.p.A. Low-pressure die-casting apparatus
JP2010214423A (ja) * 2009-03-17 2010-09-30 Sukegawa Electric Co Ltd 電磁ポンプ注湯式鋳型傾斜鋳造装置と方法
CN104588625A (zh) * 2014-12-18 2015-05-06 济南圣元机械工程有限公司 具有倾转动作的重力铸造机及其倾转动作液压控制系统
CN108463298A (zh) * 2016-01-13 2018-08-28 库尔特股份有限公司 用于铸造的装置
CN108463298B (zh) * 2016-01-13 2021-07-06 库尔特股份有限公司 用于铸造的装置
US11602786B2 (en) 2016-01-13 2023-03-14 Kurtz Gmbh Apparatus for casting
CN110576171A (zh) * 2019-09-23 2019-12-17 溧阳市新明机械配件制造有限公司 一种砂芯生产用砂模铸造装置
CN110788309A (zh) * 2019-11-28 2020-02-14 德林智能科技有限公司 一种侧浇式重力浇铸机及其使用方法
CN112091201A (zh) * 2020-09-09 2020-12-18 许清珍 一种铸造浇注装置

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