EP1444063B1 - Verfahren und formschiessmaschine zum herstellen von formteilen, wie giesskernen, für giessformen zum vergiessen von metallschmelze - Google Patents

Verfahren und formschiessmaschine zum herstellen von formteilen, wie giesskernen, für giessformen zum vergiessen von metallschmelze Download PDF

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Publication number
EP1444063B1
EP1444063B1 EP02777041A EP02777041A EP1444063B1 EP 1444063 B1 EP1444063 B1 EP 1444063B1 EP 02777041 A EP02777041 A EP 02777041A EP 02777041 A EP02777041 A EP 02777041A EP 1444063 B1 EP1444063 B1 EP 1444063B1
Authority
EP
European Patent Office
Prior art keywords
mould
filling elements
casting
mould tool
filling
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.)
Expired - Lifetime
Application number
EP02777041A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1444063A1 (de
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 Deutschland GmbH
Original Assignee
Hydro Aluminium Deutschland GmbH
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 Hydro Aluminium Deutschland GmbH filed Critical Hydro Aluminium Deutschland GmbH
Publication of EP1444063A1 publication Critical patent/EP1444063A1/de
Application granted granted Critical
Publication of EP1444063B1 publication Critical patent/EP1444063B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 a molding shooting machine for producing molded parts, such as casting cores, for casting molds for casting molten metal.
  • a molding material which is usually bound to synthetic resin is filled into the cavity of a molding tool which determines the final shape of the casting core molding to be produced.
  • the mold has a sufficient for a uniform filling of the cavity number of weft openings, via which the filling is done with molding material.
  • a "weft nozzle” is introduced, via which then the molding material is injected.
  • the firing nozzles are usually carried together by a height-adjustable "shooting head plate", which ensures a retraction and extension of the core box in the firing position.
  • the supply of the guns takes place in the known devices usually via a so-called “shooting hood", which covers the shooting head plate on its side facing away from the mold side and with molding material is filled.
  • a gas usually air, uniformly pressurized via a shooting cylinder, so that it is driven via the firing nozzles in the mold.
  • the curing can be initiated by the use of suitable binders by supplying heat.
  • suitable binders by supplying heat.
  • suitable form-shooting machines are equipped for producing mold cores with heaters for heating the mold.
  • the curing of the molding material is effected in this case by the heat supply in the mold.
  • a molding material is prepared by mixing an inorganic refractory molding sand with a water glass based inorganic binder. This molding material is then filled in a tempered, exposed to a vacuum mold during filling. The temperature / residence time of the molding material after closing the mold is adjusted so that forms a dimensionally stable and viable edge shell on the core molding. If the core molding has reached this state, the mold is opened and the core molding is removed. Immediately thereafter, the core molding is subjected to complete drying under the action of microwaves. The molding material formed by the mixture filled in the mold is thus removed by physical means moisture. As a result, through this dehumidifying process still in the mold a solidification of the core molding is achieved, which allows at least its handling in the further processing steps.
  • a method and an apparatus for producing cores from a molding material which is mixed from a molding sand and a curable, synthetic resin.
  • This molding material is filled from a firing pot via filling nozzles into a core box which depicts the core to be produced.
  • the filling device is moved to a standstill position.
  • the nozzles are immersed in a foam provided in a special box, which is impregnated with a silicone-based emulsion. In this way, a bonding of the molding material in the nozzle itself can indeed be prevented.
  • the danger remains that it comes to the curing of molding material in the gunner.
  • the resulting mold lumps can also clog the guns.
  • the object of the invention is to provide a method and a device with which moldings for casting molds can be produced reliably and with reduced susceptibility to failure from a molding material containing an inorganic binder.
  • the mold is additionally reciprocable between a filling and a removal station.
  • the components which are heated by the heat radiated by the mold to a temperature at which the unwanted premature and, as a result, disturbing curing of the molding material could be used are deliberately kept moist.
  • the components which are particularly affected by the heating are typically the shooting nozzles or the shooting hood required for supplying the shooting nozzles with the shooting plate or other molding material-carrying supply channels connected to them.
  • the moistening of the heat released by the heat emitted by the mold and consequently endangered with respect to the solidification of molding material components according to the invention is characterized in that at least one of the filling is at least temporarily exposed to a humid atmosphere during the curing time.
  • This embodiment of the invention is particularly suitable for avoiding the hardening of molding material in the firing hood, if in the hood targeted a humid atmosphere is maintained.
  • the moisture content of preferably by air As a carrier gas atmosphere formed can be easily adapted to the particular circumstances.
  • Another embodiment of the invention which is particularly easy to implement and nevertheless effective, is characterized in that at least one of the co-heated filling elements is brought into contact with a moisture carrier at least temporarily during the curing time.
  • This moisture carrier may be an absorbent material impregnated with liquid, in particular water, such as a sponge or a cloth. Practical experiments have shown that, when such a moisture carrier is docked to the waiting in the weft nozzles, the solidification of mold material contained in the nozzles can be safely avoided.
  • a hot gas preferably heated air
  • a hot gas stream is passed through the mold during the time required for the molding to harden in addition to the heat introduced via the tool itself. That way on the one hand, the gases produced in the course of curing removed from the mold.
  • additional heat is introduced into the molded part. In this case, this heat does not penetrate slowly over the peripheral shell of the molded part in its interior, but is actively transported by the gas flow in the interior of the core of the molding.
  • Moldings obtained in compliance with this variant of the procedure according to the invention therefore have a particularly high, homogeneously distributed strength even when they are removed from the mold. At the same time can be achieved in this way, for example, in the production of casting cores cycle times that are not higher than the times required for the production of corresponding cores from organic binders, in particular synthetic resins containing molding materials.
  • the form-casting machine 1 for producing casting cores K according to the "hot-box method” has a mixer 3.
  • a molding material F is mixed from an inorganic refractory molding sand and a water glass-based binder.
  • This molding material F is placed in a hopper 4 arranged below the mixer 3, from which it is passed into a shooting cylinder 5 positioned below the filling hopper 4.
  • the shooting cylinder 5 shoots the filler F in a connected to him, starting from the shooting cylinder 5 in its width and depth widening down shooting hood 6, which is closed at its bottom by a shooting head plate 7.
  • the weft nozzles 8 extending in the direction of the upper box 9 of a forming tool 10 are arranged corresponding to the weft holes 11 formed in the upper box 9.
  • the weft holes 11 open into a cavity 12 which is formed by corresponding, molded into the upper box 9 and the lower box 13 of the mold 10 recesses.
  • Other elements not shown here may be part of the molding machine 1.
  • vent openings 14 are formed, on the escape of the filled mold material F escapes during filling of the cavity 12. If necessary corresponding, not shown vents introduced into the upper box.
  • a heater 15 By means of a heater 15, the upper box 9 and the lower box 13 of the mold 10 can be controlled heated.
  • adjusting means are provided to drive the core box with the shot holes 11 to the firing nozzles 8 in a firing position in which they sit in the shot holes 11 of the mold 10. With the firing nozzles 8, the firing head plate 7, the firing cap 6, the firing cylinder 5 and the funnel 4 firmly connected to them are brought together ( Fig. 1 ).
  • the molding machine 1 After the injection of the molding material F into the mold 10, the molding machine 1 is moved into the waiting position, in which the tips of the nozzles 9 are arranged at a distance above the mold 10 ( Fig. 2 ).
  • This waiting position keep the shot nozzles 8 until the molding material F contained in the cavity 12 of the molding tool 10 has hardened to the casting core K due to the dehumidification that occurs as a result of the heating of the molding material F in the molding tool 10. If no air flow L is passed through the forming tool 10 through overpressure or underpressure to improve the hardening process, then the gases produced in the course of hardening escape automatically via the shot holes 11 and the vent openings 14 out of the molding tool 10.
  • a humidifying device 16 is connected, can be passed through the humid air into the interior of the firing hood 6.
  • Sponge 17 is mounted on a plate 18 which can be driven with the weft nozzles 8 in the waiting under the firing nozzles 8 and raised so that the sponge 17 presses against the firing nozzles 8 and at least completely surrounds their lower, the nozzle opening portion.
  • the nozzles 8 are each associated with a nozzle 19 via which moist air supplied by the moistening device 16 when the firing nozzles 8 are in the waiting position is blown onto the firing nozzles 8.
  • the moisture content of the introduced in the waiting position in the firing hood 6 and blown against the firing nozzles 8 moist air is adjusted so that there is no dehydration of the molding material. In this way, it is reliably prevented that the molding sand F still contained in the firing hood 6 and the firing nozzles 8 solidifies as a result of the heating and the dehydration, which causes the respective components due to the radiant heat W emitted by the hot mold 10 during both Filling process ( Fig. 1 ) as well as in the longer waiting position ( Fig. 2 ) are exposed.
  • a device 20 which has an air supply connection 21 and suction connection 22.
  • the air supply connection 21 of the device 20 with the shot holes 11 and the suction connection 22 of the device 20 with ventilation openings 14 of the molding tool 10 are coupled (FIG. Fig. 2 ).
  • a hot, dry air stream L is continuously fed into the mold 10 via the air supply connection 21.
  • This air stream L flows through the casting core K contained in the mold 10, which is hardened, and is drawn off via the vent openings 14 of the molding tool 10. In this way, the core interior is heated evenly, so that the moisture contained in the core K escapes faster overall.
  • the air stream L extracted via the suction connection 22 transports the gases produced during the heating of the casting core K in a targeted and rapid manner out of the mold 10.
  • the more homogeneous heat distribution in the casting core K achieved by the air flow L thus results in a shortened curing time with simultaneously improved strength of the casting core K.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP02777041A 2001-09-08 2002-09-09 Verfahren und formschiessmaschine zum herstellen von formteilen, wie giesskernen, für giessformen zum vergiessen von metallschmelze Expired - Lifetime EP1444063B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10144193A DE10144193C1 (de) 2001-09-08 2001-09-08 Verfahren und Formschießmaschine zum Herstellen von Formteilen, wie Gießkernen, für Gießformen zum Vergießen von Metallschmelze
DE10144193 2001-09-08
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 (2)

Publication Number Publication Date
EP1444063A1 EP1444063A1 (de) 2004-08-11
EP1444063B1 true EP1444063B1 (de) 2008-04-30

Family

ID=7698262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02777041A Expired - Lifetime EP1444063B1 (de) 2001-09-08 2002-09-09 Verfahren und formschiessmaschine zum herstellen von formteilen, wie giesskernen, für giessformen zum vergiessen von metallschmelze

Country Status (15)

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

Families Citing this family (9)

* 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
DE102005057724B3 (de) * 2005-12-01 2007-02-01 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
US7819168B2 (en) * 2006-07-27 2010-10-26 Hunter Automated Machinery Corporation Method and apparatus for transferring sand into flask of molding machine
DE102010018751B4 (de) * 2010-04-29 2015-08-13 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
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
KR102598965B1 (ko) * 2019-03-08 2023-11-06 현대자동차주식회사 무기점결제를 이용한 코어 제조장치
DE102021002770A1 (de) * 2021-05-28 2022-12-01 Voxeljet Ag 3d-druckverfahren und damit hergestelltes formteil unter verwendung von wasserglasbinder und ester

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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.
DE4208647C2 (de) * 1992-03-18 1995-06-29 Hottinger Adolf Masch Vorrichtung zum Schießen von Gießereikernen oder -formen mit Formstoffen
DE4326180C2 (de) * 1993-08-04 1997-01-30 Hottinger Adolf Masch Schußkopf für eine Kernschießmaschine
EP0774311A1 (en) * 1995-11-17 1997-05-21 Sintokogio, Ltd. Apparatus and method for producing a core
DE19632293C2 (de) * 1996-08-09 1999-06-10 Thomas Prof Dr In Steinhaeuser Verfahren zur Herstellung von Kernformlingen für die Gießereitechnik
US6467525B2 (en) * 2000-07-24 2002-10-22 Hormel Foods, Llc Gelatin coated sand core and method of making same

Also Published As

Publication number Publication date
ZA200401807B (en) 2005-05-30
PL367721A1 (en) 2005-03-07
RU2277453C2 (ru) 2006-06-10
KR20040063117A (ko) 2004-07-12
CA2459430A1 (en) 2003-03-20
US20040250977A1 (en) 2004-12-16
CN1292857C (zh) 2007-01-03
ES2305307T3 (es) 2008-11-01
BR0212370A (pt) 2004-08-17
RU2004110620A (ru) 2005-06-10
DE50212194D1 (de) 2008-06-12
ATE393676T1 (de) 2008-05-15
HUP0402386A2 (en) 2007-05-02
WO2003022487A1 (de) 2003-03-20
DE10144193C1 (de) 2002-10-31
MXPA04002068A (es) 2005-04-29
EP1444063A1 (de) 2004-08-11
CN1568236A (zh) 2005-01-19
PL204048B1 (pl) 2009-12-31

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