EP1981667B1 - VERFAHREN ZUM MONTIEREN EINER GIEßFORM ZUM GIEßEN EINES GUSSTEILS AUS EINER METALLSCHMELZE - Google Patents

VERFAHREN ZUM MONTIEREN EINER GIEßFORM ZUM GIEßEN EINES GUSSTEILS AUS EINER METALLSCHMELZE Download PDF

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Publication number
EP1981667B1
EP1981667B1 EP07704507A EP07704507A EP1981667B1 EP 1981667 B1 EP1981667 B1 EP 1981667B1 EP 07704507 A EP07704507 A EP 07704507A EP 07704507 A EP07704507 A EP 07704507A EP 1981667 B1 EP1981667 B1 EP 1981667B1
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EP
European Patent Office
Prior art keywords
mold
casting
magnet
cooling
chill
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.)
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Application number
EP07704507A
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German (de)
English (en)
French (fr)
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EP1981667A1 (de
Inventor
Klaus Lellig
Gerhard Sehy
Dieter Mees
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.)
Nemak Dillingen GmbH
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Nemak Dillingen GmbH
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Priority to PL07704507T priority Critical patent/PL1981667T3/pl
Publication of EP1981667A1 publication Critical patent/EP1981667A1/de
Application granted granted Critical
Publication of EP1981667B1 publication Critical patent/EP1981667B1/de
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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
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings

Definitions

  • the invention relates to a method for assembling a mold assembly composed of mold parts for casting a cylinder block of an internal combustion engine from a molten metal, wherein at least one cooling mold, which forms at least a portion of the inner surfaces of a cylinder chamber of the cylinder block is positioned and held on a wall of one of the mold parts ,
  • cooling molds are used in particular when pouring light metal melts into the mold from a high consist of thermally conductive material and as such constitute a heat sink over which the melt coming into contact with the metal inserts are removed in a short time comparably large amounts of heat. Accordingly, cooling molds are, for example, arranged during the casting of cylinder blocks of cast aluminum material in such a way that they depict the cylinder liners on the block to be cast.
  • the casting material which contacts the cooling molds arranged in this way then cools much faster than the melt which is present further away from the molds in the casting mold, so that the desired directional solidification is established in the region of the raceways with the development of a fine-grained microstructure.
  • German patent 719 454 a method and an apparatus for producing cores or moldings for casting molds from a core or molding compound known, which allow to keep a cooling iron in the respective mold or core box so that it is safe at its intended position of each core to be produced or molding sits.
  • the respective cooling iron is first positioned in the empty mold or core box, wherein it rests in this position in each case on an outer wall of the mold or core box.
  • the invention had the object of specifying a method of the type mentioned, with which can be mounted in a simple yet reliable way casting molds for the casting of cylinder blocks with provided in the mold cavity metal inserts.
  • the inventive method is particularly suitable for casting of light metal melts, especially aluminum-based melts.
  • the respective cooling mold which may also be referred to below as "metal insert" is held in the mold in the mold intended for installation in a simple manner by magnetic forces exerted by at least one suitably arranged magnet.
  • the cooling molds themselves are magnetically sensitive. Accordingly, in particular ferromagnetic materials, such as iron and its alloys, are suitable as the material for the chill molds.
  • cooling molds used in accordance with the invention can be produced from cost-effective and wear-resistant materials, such as cast iron.
  • the magnetic body exerting the holding forces on the respective cooling mold during the assembly process is arranged such that it does not disturb the pouring of the molten metal or other assembly operations.
  • the cooling molds When working according to the invention, it is no longer necessary to incorporate the cooling molds in a mold part in order to hold them. Rather, the cooling molds can be handled separately from the mold parts, so that they can be handled as a mold part during assembly of the mold. This leads to a significant simplification of the entire manufacturing process.
  • cooling molds no longer have to be firmly bound in a casting mold part or in the respective casting in the procedure according to the invention, there is no longer the problem of damage to the cooling molds or the casting during demoulding when removing a mold according to the invention.
  • the coating of the cooling molds can be omitted and the preparation effort can be reduced.
  • cooling molds can be easily removed after casting from the casting and the moldings of the mold. This advantage is particularly evident in the casting of cylinder blocks of internal combustion engines, in technical language also referred to as "engine blocks" in which the cooling molds depict the running surfaces of the cylinders.
  • Another advantage of the invention is that it can be easily integrated into existing systems.
  • the inventive method thus enables a simpler and more cost-effective production of castings compared to the prior art.
  • the invention is particularly suitable for casting castings from light metal melts, in particular aluminum melts.
  • the mold parts from which a casting mold according to the invention is composed are preferably made from a molding material which is mixed from a molding base material and a binder.
  • a molding material which is mixed from a molding base material and a binder.
  • quartz-containing or quartz-free sands may be used as mold bases, while both inorganic and organic binders may be used as binders.
  • the invention proves to be particularly advantageous when the casting mold is designed in a manner known per se as a core package.
  • the positioning and holding a chill mold in the mold can be carried out in the inventive procedure, regardless of a specific preparation of the respective place where the metal part is to be arranged. Accordingly, the positioning of the metal part can be made at a time that is determined solely by the each optimal workflow during assembly of the respective mold.
  • the decisive factor is merely that the magnet required for holding can be arranged in the region of the cooling mold to be held such that the forces exerted by it reliably grasp the cooling mold.
  • an opening may be formed in the mold part, on the wall of which the cooling mold is positioned, into which the magnet is inserted.
  • the magnet used to hold the mold may be moved into close proximity to the mold to facilitate the mounting operation.
  • the mold part is formed like a mandrel with a blind hole opening into which the magnet is inserted.
  • a plurality of cooling molds can be arranged side by side on the outer surface of the mold part, so that together they image the inner shape of the respective cylinder and are held together by a magnet arranged in the central blind hole opening.
  • cooling mold is held in its position by means of the magnet until a further casting mold part is arranged, which then holds the cooling mold in its position in a positive and / or non-positive manner.
  • the chill is by mounted after positioning mold parts in held their position without this magnetic forces are required. Another advantage of this approach when holding the chill is that the position of the chill mold in the mold by the other, with him positive and / or non-positively coming in contact mold parts can be accurately defined.
  • all magnets that can generate a sufficiently strong magnetic field are suitable for applying the magnetic forces used to hold the cooling mold according to the invention.
  • permanent magnets are provided to apply the holding forces in the inventive manner to the respective cooling mold.
  • Electromagnets not only allow an exact adjustment of the strength of the respective magnetic field generated by them, but it is also possible with them in a simple manner to set by turning on and off the electrical power exactly the period within which the magnetic forces in accordance with the invention to the respective chill be applied. In question come for this purpose, for example, based on coils produced electromagnets. The magnetic field of such electromagnets can be proportionally controlled by the current conducted through the coils.
  • the invention is particularly suitable for producing a cylinder block of an internal combustion engine from a light metal melt, such as an aluminum or a magnesium melt, wherein at least one partial section of the inner surfaces of the respective cylinder chamber of the cylinder block can be imaged with one or more cooling molds.
  • a light metal melt such as an aluminum or a magnesium melt
  • the invention is particularly suitable for use in a fully automatic device for assembling a casting mold, in which devices, such as robots, are provided for handling the mold parts. These devices can also easily position the chill when using the invention, since the hold of this metal insert is secured in its respective position by the magnet and no cohesive connection of the chill mold to one of the mold parts is required.
  • the integrally formed mold part 1 is part of a mold, not further illustrated here, for casting a cylinder block for an internal combustion engine from a melt, which is formed from a cast aluminum alloy. It is produced in a manner known per se from a molding material which is mixed from a molding sand as molding material and a binder, and has a base portion 2, which carries an upwardly projecting, substantially cylindrically shaped mandrel portion 3.
  • the mandrel portion 3 has a lateral surface 4, which is divided by four radially projecting ribs 5 into four sections.
  • a circumferential groove 6 is formed in the substantially perpendicular to the peripheral surface 4 of the mandrel portion 3 aligned around the mandrel portion 3 encircling upper end surface 7 of the base portion.
  • the mandrel section may also have a lateral surface which is divided by radially projecting ribs into two, three or more sections.
  • the ribs may be conically tapered or widening.
  • the mandrel portion and a lateral surface not by additional ribs is divided. In this case, the lateral surface is completely enclosed by the respectively accommodating cooling molds.
  • a blind hole 9 is formed, extending from the end face 8 of the base portion 2 to the end face of the mandrel portion 3 forming end wall 10th of the mandrel portion 3 extends.
  • the diameter of the blind hole 9 is adapted to the outer diameter of the mandrel portion 3, that between the inner surfaces of the blind hole 9 and the lateral surface 4, only a wall 11 is provided with a small wall thickness, which is sufficient to ensure the required dimensional stability of the mandrel portion 3.
  • an electromagnet 12 is inserted, which is attached to the free end of a rod 13.
  • the rod 13 with the electromagnet 12 is part of a further not shown device for holding metal parts 14,15,16,17, which have been recognized as cooling molds from a device, not shown here for positioning on the lateral surface 4 of the mandrel portion 3.
  • the rod 13 with the electromagnet 12 can by means of a likewise not shown adjusting device from a rest position in which the electromagnet 12 is located outside the blind hole 9 in the in Fig. 1 shown operating position to be moved, in which the solenoid 12 is completely inserted into the blind hole 9.
  • the supply of the electromagnet 12 with electrical Energy is supplied via a control device, also not shown, which energizes the electromagnet 12 when the cooling molds 14 - 17 are positioned to hold them in position.
  • the height of the cooling molds 14-17 is adapted to the height of the mandrel portion 3.
  • the cooling molds on their upper and lower narrow side in each case an upwardly or downwardly projecting web 18,19, of which the lower web 18 engages in the groove 6, so that the cooling molds 14 - 17 are held there form-fitting.
  • the cooling molds 14 - 17 are curved in such a way that they lie flush against the respectively assigned section of the lateral surface 4 of the mandrel section 3.
  • the width of the cooling molds 14 - 17 is matched to the width of the sections of the lateral surface 4 such that the sections of the lateral surface 4 are completely filled by the cooling molds 14 - 17 lying flush against them.
  • the cooling molds 14-17 are cast as cast iron from a cast iron alloy, which is known under the name GG20 (according to DIN 1691).
  • the electromagnet 12 is subjected to electrical energy.
  • the magnetic field subsequently generated by the electromagnet 12 detects the cooling molds 14-17 and holds them in their position on the lateral surface 4 of the mandrel portion 3.
  • the other, not shown here parts of the mold are mounted.
  • One of the mold parts, not shown, in this case has a groove-shaped receptacle, in the after the positioning of the respective mold part at the upper end of the cooling molds 14 - 17 formed rib 19 engages, so that the cooling molds 14 - 17 are then held positively at its upper end.
  • the power supply of the electromagnet 12 can be switched off and the rod 13 with the electromagnet 12 can be pulled out of the blind opening 9.
  • the cooling molds 14 - 17 form the raceways of one of the cylinders of the cylinder block.
  • the cooling molds 14 - 17 form a heat sink, by which it is ensured that the aluminum melt coming into contact with the cooling molds 14 - 17 rapidly solidifies and forms a fine-grained microstructure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP07704507A 2006-02-10 2007-02-09 VERFAHREN ZUM MONTIEREN EINER GIEßFORM ZUM GIEßEN EINES GUSSTEILS AUS EINER METALLSCHMELZE Active EP1981667B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07704507T PL1981667T3 (pl) 2006-02-10 2007-02-09 Sposób montażu formy odlewniczej do odlewania odlewu z roztopionego metalu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006006132A DE102006006132A1 (de) 2006-02-10 2006-02-10 Verfahren und Vorrichtung zum Montieren einer Gießform zum Gießen eines Gussteils aus einer Metallschmelze
PCT/EP2007/051294 WO2007090895A1 (de) 2006-02-10 2007-02-09 VERFAHREN ZUM MONTIEREN EINER GIEßFORM ZUM GIEßEN EINES GUSSTEILS AUS EINER METALLSCHMELZE

Publications (2)

Publication Number Publication Date
EP1981667A1 EP1981667A1 (de) 2008-10-22
EP1981667B1 true EP1981667B1 (de) 2009-11-18

Family

ID=38080807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07704507A Active EP1981667B1 (de) 2006-02-10 2007-02-09 VERFAHREN ZUM MONTIEREN EINER GIEßFORM ZUM GIEßEN EINES GUSSTEILS AUS EINER METALLSCHMELZE

Country Status (8)

Country Link
US (1) US20090165983A1 (pl)
EP (1) EP1981667B1 (pl)
JP (1) JP2009525875A (pl)
BR (1) BRPI0707647A2 (pl)
CA (1) CA2640308A1 (pl)
DE (2) DE102006006132A1 (pl)
PL (1) PL1981667T3 (pl)
WO (1) WO2007090895A1 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019110580A1 (de) * 2019-04-24 2020-10-29 Nemak, S.A.B. De C.V. Vorrichtung und Verfahren zur Entnahme mindestens eines Kühlelementes aus einem wenigstens teilweise entformten Gussteil, Verfahren zur Einbringung mindestens eines Kühlelementes in einen Formkern einer Gussteilform, Kühlelement sowie Gussteil

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079356A1 (de) * 2011-07-18 2013-01-24 Mahle International Gmbh Gießkern einer Gussform zur Herstellung eines Zylinders
DE102016009658A1 (de) 2016-08-09 2017-02-16 Daimler Ag Verfahren zum Gießen eines Gussbauteils aus einer Metallschmelze
CN110014123B (zh) * 2019-04-19 2021-07-06 山东国创精密机械有限公司 一种百吨级乏燃料贮运一体化金属容器的铸造方法
RU2720331C1 (ru) * 2019-11-15 2020-04-28 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский государственный университет" (НИ ТГУ) Способ литья в кокиль для получения плоских отливок из алюминиевых и магниевых сплавов
CN113547081B (zh) * 2021-07-24 2023-03-03 共享装备股份有限公司 一种3d打印砂芯冷铁固定方法

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CH314713A (de) * 1953-03-20 1956-06-30 Bohn Aluminium & Brass Corp Giessmaschine zur Herstellung hohler Gussstücke
US2775803A (en) * 1955-05-18 1957-01-01 Victor E Zang Chill plates
DD97568A1 (pl) * 1972-06-14 1973-05-14
JPS54173013U (pl) * 1978-05-26 1979-12-06
JPS5674349A (en) * 1979-11-24 1981-06-19 Sanwa Chuzosho:Kk Fixing method of chill for molding
GB8409044D0 (en) * 1984-04-07 1984-05-16 Gkn Technology Ltd Casting metal articles
JPS6149746A (ja) * 1984-08-20 1986-03-11 Mazda Motor Corp シエル鋳型造型用エジエクト装置
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JPH03138066A (ja) * 1989-10-25 1991-06-12 Mazda Motor Corp 鋳鉄製シリンダブロックの製造方法
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US7409982B2 (en) * 2005-08-19 2008-08-12 Gm Global Technology Operations, Inc. Foundry mold assembly device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019110580A1 (de) * 2019-04-24 2020-10-29 Nemak, S.A.B. De C.V. Vorrichtung und Verfahren zur Entnahme mindestens eines Kühlelementes aus einem wenigstens teilweise entformten Gussteil, Verfahren zur Einbringung mindestens eines Kühlelementes in einen Formkern einer Gussteilform, Kühlelement sowie Gussteil

Also Published As

Publication number Publication date
CA2640308A1 (en) 2007-08-16
US20090165983A1 (en) 2009-07-02
JP2009525875A (ja) 2009-07-16
DE102006006132A1 (de) 2007-08-16
PL1981667T3 (pl) 2010-04-30
EP1981667A1 (de) 2008-10-22
DE502007002040D1 (de) 2009-12-31
WO2007090895A1 (de) 2007-08-16
BRPI0707647A2 (pt) 2011-05-10

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