US20040250977A1 - Method and mould shooter for producing mould parts, such as casting cores, for casting moulds used to cast metal melt - Google Patents

Method and mould shooter for producing mould parts, such as casting cores, for casting moulds used to cast metal melt Download PDF

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Publication number
US20040250977A1
US20040250977A1 US10/489,047 US48904704A US2004250977A1 US 20040250977 A1 US20040250977 A1 US 20040250977A1 US 48904704 A US48904704 A US 48904704A US 2004250977 A1 US2004250977 A1 US 2004250977A1
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US
United States
Prior art keywords
mould
shooting
mould tool
filling elements
casting
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.)
Abandoned
Application number
US10/489,047
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English (en)
Inventor
Bernhard Stauder
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.)
Hydro Aluminium Mandl and Berger GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to HYDRO ALUMINIUM MANDI & BERGER GMBH reassignment HYDRO ALUMINIUM MANDI & BERGER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STAUDER, BERNHARD
Publication of US20040250977A1 publication Critical patent/US20040250977A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C19/00—Components or accessories for moulding machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B22C15/245—Blowing tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B22C9/123—Gas-hardening

Definitions

  • the invention relates to a method and shoot-moulding machine for the manufacture of mould parts, such as casting cores, for casting moulds for the casting of molten metal.
  • the nozzles are usually supplied via what is referred to as a “shooting hood”, which covers the shooting head plate on its side turned away from the mould tool, and is filled with mould material.
  • ashooting hood which covers the shooting head plate on its side turned away from the mould tool, and is filled with mould material.
  • the mould material contained in the shooting hood is abruptly subjected to uniform pressure by means of a gas, generally air, by means of a pressure cylinder, so that it is driven through the shooting nozzles into the mould tool.
  • the hardening can be initiated with the use of suitable binding agents by the application of heat.
  • suitable binding agents by the application of heat.
  • known shoot-moulding machines for the manufacture of mould cores are equipped with heating units in order to heat the mould tool.
  • the hardening of the mould material is in this case brought about by the application of heat in the mould tool.
  • a mould material is first manufactured by the mixing of an inorganic refractory mould sand with an inorganic binding agent on a water glass base.
  • This mould material is then filled into a temperature-controlled mould tool, which is subjected to underpressure during the filling.
  • the temperature/dwell time of the mould material after the closure of the mould tool is adjusted in this situation in such a way that a skin shell which is stable in shape and . . . of bearing is formed on the core formed body.
  • the mould tool is opened and the core form removed.
  • the core formed body is subjected to complete drying under the effect of microwaves.
  • the premature hardening of the mould material leads, for example, to crust formation in the shooting hood on the surface of the mould material, so that the mould material can no longer be introduced in the proper manner into the mould tool, resulting in the incomplete filling of the mould tool and the clogging of the shooting nozzles.
  • Mould material which hardens by itself in the shooting nozzles also leads to the clogging of the nozzles, with the result likewise that a uniform and proper filling is no longer guaranteed.
  • the object of the invention is to provide a method and device with which moulded parts for casting moulds can be manufactured, reliably and with reduced susceptibility to faults, from a mould material containing an inorganic binding agent.
  • a mould material containing an inorganic binding agent is filled into a cavity of a mould tool which determines the shape of the mould part which is to be manufactured
  • the mould tool is additionally capable of being moved backwards and forwards between a filling station and a removal station.
  • the parts which are particularly affected by the heating are in this case typically the shooting nozzles or the shooting hood required for supplying the shooting nozzles, with the shooting plate or other supply channels conducting mould materials connected to it.
  • mould parts are deliberately kept moist during the dwell time required for the hardening of the mould parts in the mould tool, this prevents, for example, both the formation of crust in the shooting hood as well as the clogging of the shooting nozzles due to the solidifying mould material.
  • mould materials containing inorganic water-based binding agents can be reliably used for mould parts for casting operations.
  • the mould parts obtained are characterised by high strength and after use can be conducted back into the circle of the materials used for the manufacture of the mould.
  • the moistening of the parts heated by the heat emitted by the mould tool and consequently at risk with regard to the solidification of the mould material can be effected according to a first variant of the invention by at least one of the filling elements being subjected at least temporarily to a moist atmosphere during the hardening period.
  • This embodiment of the invention is particularly well-suited for avoiding the hardening of mould material in the shooting hood, if a moist atmosphere is specifically maintained in the hood.
  • the moisture content of the atmosphere, formed for preference by air as the carrier gas, can in this situation be adjusted with no problem to the particular circumstances.
  • a further embodiment of the invention which is particularly easy to implement but nevertheless effective is characterised in that at least one of the filling elements which is heated concomitantly is brought at least temporarily in contact with a moisture carrier during the hardening period.
  • This moisture carrier can be an absorbent material which is soaked with liquid, in particular water, such as a sponge or cloth. Practical tests have revealed that if such a moisture carrier is docked against shooting nozzles which are in the stand-by position, the solidification of mould material contained in the nozzles is reliably avoided.
  • a hot gas for preference heated air
  • the progress of the hardening of the mould part contained in the mould tool can be specifically improved.
  • a hot, dry gas flow is conducted through the mould.
  • the gases incurred in the course of the hardening will be conducted out of the mould tool.
  • additional heat will be introduced into the mould part. In this situation, this heat does not penetrate slowly via the shell of the mould part into its interior, but is actively conveyed by the gas flow into the interior of the core of the mould part.
  • FIG. 1 A hoot-moulding machine for the manufacture of casting cores in a first operational position
  • FIG. 2 The shoot-moulding machine represented in FIG. 1 in a second operational position.
  • the shoot-moulding machine 1 for the manufacture of casting cores K according to the “Hot Box method” exhibits a mixer 3 .
  • Mixed in the mixer 3 is a mould material F consisting of an inorganic refractory mould sand and a binding agent based on water glass.
  • This mould material F is introduced into a filling hopper 4 arranged beneath the mixer 3 , from which it is conducted to a shooting cylinder 5 positioned beneath the filling hopper 4 .
  • the shooting cylinder 5 shoots the filling material F into a shooting hood 6 , connected to it and widening downwards in its width and depth from the shooting cylinder 5 , the shooting hood being closed on its underside by a shooting head plate 7 .
  • Formed into the shooting head plate 7 are a large number of mounts, not represented, in each of which a shooting nozzle 8 is located.
  • the shooting nozzles 8 extending in the direction of the cope 9 of a mould tool 10 are arranged in accordance with the shooting holes 11 formed in the cope 9 .
  • the shooting holes 11 open into a cavity 12 , which is formed by corresponding recesses formed in the cope 9 and the drag box 13 of the mould tool 10 . Further elements not represented here can be constituent parts of the moulding machine 1 .
  • the shape of the casting core K which is to be manufactured is determined by the cavity 12 .
  • Venting openings 14 are formed in the drag box 13 , by means of which the air displaced by the mould material F when it is filled into the cavity 12 escapes. If required, corresponding venting openings, not represented here, are located in the cope.
  • the cope 9 and the drag box 13 of the mould tool can be heated in a controlled manner by means of a heating device 15 .
  • the shooting head plate 7 secured firmly to them, the shooting hood 6 , the shooting cylinder 5 , and the hopper 4 are all brought together (FIG. 1).
  • the moulding machine 1 is moved into the stand-by position, in which the tips of the shooting nozzles 9 are arranged at a distance interval above the mould tool 10 (FIG. 2).
  • This stand-by position is maintained by the shooting nozzles 8 until the mould material F contained in the cavity 12 of the mould tool 10 has hardened to form the casting core K as a result of the dehydration which results as a consequence of the heating of the mould material F in the mould tool.
  • a moistening device 16 is connected to the shooting hood 6 , by means of which moist air can be conducted into the interior of the shooting hood 6 .
  • a sponge 17 is secured on a plate 18 , which with the shooting nozzles 8 located in the stand-by position can be moved beneath the shooting nozzles 8 and raised in such a way that the sponge 17 presses against the shooting nozzles 8 and fully surrounds at least their lower section, which exhibits the nozzle opening.
  • a nozzle 19 is allocated in each case to the shootting nozzle 8 , by means of which, with the shooting nozzles 8 in the stand-by position, the moist air delivered from the moistening device 16 is blown onto the shooting nozzles 8 .
  • the moisture content of the moist air introduced into the shooting hood 6 in the stand-by position and blown against the shooting nozzles 8 is determined in such a way that the mould material cannot be dehydrated. In this way the risk can be reliably prevented of the mould sand F still contained in the shooting hood 6 and the shooting nozzles 8 in the stand-by position solidifying as a result of the heating and the extraction of the water, to which the parts in question are subjected due to the radiant heat W emitted from the hot mould tool 10 both during the filling process (FIG. 1) as well as in the stand-by position (FIG. 2) which they occupy for longer.
  • the sponge 17 pressed against the shooting nozzles 8 in the stand-by position also specifically ensures that no clogging of the nozzle apertures of the shooting nozzles 8 occurs as a result of clogging mould material F.
  • the formation of condensation in the area of the shooting nozzles 8 can be further supported by the shooting nozzles 8 being cooled in the stand-by position with the aid of a cooling device, not shown here.
  • This cooling process also reliably prevents the temperature in the interior of the shooting nozzles 8 rising to a level which is critical for the solidification of the mould material F.
  • the moistening of the outside of the shooting nozzles 8 guarantees that no solidified mould sand F becomes baked onto the shooting nozzles 8 .
  • a device 20 which exhibits an air delivery connection 21 and suction extraction connection 22 .
  • the air delivery connection 21 of the device 20 is coupled to the shooting holes 1 and the suction extraction connection 22 of the device 20 is coupled to venting openings 14 of the mould tool 10 (FIG. 2).
  • a hot, dry air flow L is constantly conducted into the mould tool 10 via the air delivery connection 21 .
  • This air flow L flows through the casting core K contained in the mould tool 10 being in the process of hardening, and is drawn off via the venting openings 14 of the mould tool 10 . In this way also the interior of the core is uniformly heated, so that the moisture contained in the casting core K as a whole escapes more rapidly.
  • the air flow L extracted via the suction extraction connection 22 conveys the gases incurred in the course of the heating of the casting core K in a targeted and rapid manner out of the mould tool 10 .
  • the more homogenous heat distribution attained in the casting core K by the air flow L accordingly has the effect of incurring a shortened hardening time, with improved strength of the casting core K obtained being achieved at the same time.
US10/489,047 2001-09-08 2002-09-09 Method and mould shooter for producing mould parts, such as casting cores, for casting moulds used to cast metal melt Abandoned US20040250977A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10144193.2 2001-09-08
DE10144193A DE10144193C1 (de) 2001-09-08 2001-09-08 Verfahren und Formschießmaschine zum Herstellen von Formteilen, wie Gießkernen, für Gießformen zum Vergießen von Metallschmelze
PCT/EP2002/010079 WO2003022487A1 (de) 2001-09-08 2002-09-09 Verfahren und formschiessmaschine zum herstellen von formteilen, wie giesskernen, für giessformen zum vergiessen von metallschmelze

Publications (1)

Publication Number Publication Date
US20040250977A1 true US20040250977A1 (en) 2004-12-16

Family

ID=7698262

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/489,047 Abandoned US20040250977A1 (en) 2001-09-08 2002-09-09 Method and mould shooter for producing mould parts, such as casting cores, for casting moulds used to cast metal melt

Country Status (15)

Country Link
US (1) US20040250977A1 (de)
EP (1) EP1444063B1 (de)
KR (1) KR20040063117A (de)
CN (1) CN1292857C (de)
AT (1) ATE393676T1 (de)
BR (1) BR0212370A (de)
CA (1) CA2459430A1 (de)
DE (2) DE10144193C1 (de)
ES (1) ES2305307T3 (de)
HU (1) HUP0402386A2 (de)
MX (1) MXPA04002068A (de)
PL (1) PL204048B1 (de)
RU (1) RU2277453C2 (de)
WO (1) WO2003022487A1 (de)
ZA (1) ZA200401807B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007062706A1 (de) * 2005-12-01 2007-06-07 Laempe & Mössner GmbH Verfahren und vorrichtung zur herstellung von formen oder kernen insbesondere für giessereizwecke
US20080023171A1 (en) * 2006-07-27 2008-01-31 William Gary Hunter Method and apparatus for transferring sand into flask of molding machine
US20130042989A1 (en) * 2010-04-29 2013-02-21 Laempe & Mossner Gmbh Method and device by which moulding compound to be processed is kept moist during the production of moulds or cores
CN111659857A (zh) * 2019-03-08 2020-09-15 现代自动车株式会社 用于使用无机粘结剂制造型芯的设备

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10340491B3 (de) * 2003-09-03 2005-03-10 Laempe & Gies Gmbh Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen
CN102601319A (zh) * 2012-03-26 2012-07-25 苏州明志科技有限公司 一种射筒
DE102013204619B3 (de) * 2013-03-15 2014-05-15 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Herstellen von Formen oder Kernen für Gießereizwecke
KR101961295B1 (ko) * 2017-06-22 2019-03-25 안종민 사형 주조용 코어 성형장치
DE102021002770A1 (de) * 2021-05-28 2022-12-01 Voxeljet Ag 3d-druckverfahren und damit hergestelltes formteil unter verwendung von wasserglasbinder und ester

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5524703A (en) * 1992-03-18 1996-06-11 Adolf Hottinger Maschinenbau Gmbh Apparatus for shooting foundry cores or molds with molding materials
US5597029A (en) * 1993-08-04 1997-01-28 Adolf Hottinger Maschinenbau Gmbh Shooting head for a core shooter
US6467525B2 (en) * 2000-07-24 2002-10-22 Hormel Foods, Llc Gelatin coated sand core and method of making same

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
JPH0780037B2 (ja) * 1990-02-23 1995-08-30 株式会社浪速製作所 下金型固定式水平割鋳型造型機
FR2687942B1 (fr) * 1992-02-27 1997-08-14 Peugeot Procede et dispositif de moulage de noyaux en sable de fonderie contenant une resine durcissable, permettant d'eviter le colmatage de buses d'injection du sable.
EP0774311A1 (de) * 1995-11-17 1997-05-21 Sintokogio, Ltd. Vorrichtung und Verfahren zur Herstellung eines Kernes
DE19632293C2 (de) * 1996-08-09 1999-06-10 Thomas Prof Dr In Steinhaeuser Verfahren zur Herstellung von Kernformlingen für die Gießereitechnik

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5524703A (en) * 1992-03-18 1996-06-11 Adolf Hottinger Maschinenbau Gmbh Apparatus for shooting foundry cores or molds with molding materials
US5597029A (en) * 1993-08-04 1997-01-28 Adolf Hottinger Maschinenbau Gmbh Shooting head for a core shooter
US6467525B2 (en) * 2000-07-24 2002-10-22 Hormel Foods, Llc Gelatin coated sand core and method of making same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007062706A1 (de) * 2005-12-01 2007-06-07 Laempe & Mössner GmbH Verfahren und vorrichtung zur herstellung von formen oder kernen insbesondere für giessereizwecke
US20080277089A1 (en) * 2005-12-01 2008-11-13 Laempe & Mossner Gmbh Method and Device for Producing Moulds or Cores, in Particular for Foundry Purposes
JP2009517220A (ja) * 2005-12-01 2009-04-30 レムペ ウント メスナー ゲゼルシャフト ミット ベシュレンクテル ハフツング 特にキャスティング目的のための型または中子を製造するための方法並びに装置
US7934534B2 (en) 2005-12-01 2011-05-03 Laempe & Mossner Gmbh Method and device for producing moulds or cores, in particular for foundry purposes
JP4878372B2 (ja) * 2005-12-01 2012-02-15 レムペ ウント メスナー ゲゼルシャフト ミット ベシュレンクテル ハフツング 特にキャスティング目的のための型または中子を製造するための方法並びに装置
US20080023171A1 (en) * 2006-07-27 2008-01-31 William Gary Hunter Method and apparatus for transferring sand into flask of molding machine
US7819168B2 (en) * 2006-07-27 2010-10-26 Hunter Automated Machinery Corporation Method and apparatus for transferring sand into flask of molding machine
US20130042989A1 (en) * 2010-04-29 2013-02-21 Laempe & Mossner Gmbh Method and device by which moulding compound to be processed is kept moist during the production of moulds or cores
CN111659857A (zh) * 2019-03-08 2020-09-15 现代自动车株式会社 用于使用无机粘结剂制造型芯的设备

Also Published As

Publication number Publication date
MXPA04002068A (es) 2005-04-29
RU2277453C2 (ru) 2006-06-10
KR20040063117A (ko) 2004-07-12
ATE393676T1 (de) 2008-05-15
BR0212370A (pt) 2004-08-17
RU2004110620A (ru) 2005-06-10
EP1444063A1 (de) 2004-08-11
PL367721A1 (en) 2005-03-07
CN1292857C (zh) 2007-01-03
CN1568236A (zh) 2005-01-19
ES2305307T3 (es) 2008-11-01
WO2003022487A1 (de) 2003-03-20
DE50212194D1 (de) 2008-06-12
ZA200401807B (en) 2005-05-30
DE10144193C1 (de) 2002-10-31
HUP0402386A2 (en) 2007-05-02
PL204048B1 (pl) 2009-12-31
CA2459430A1 (en) 2003-03-20
EP1444063B1 (de) 2008-04-30

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Legal Events

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AS Assignment

Owner name: HYDRO ALUMINIUM MANDI & BERGER GMBH, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STAUDER, BERNHARD;REEL/FRAME:015737/0734

Effective date: 20040604

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION