EP0133211B1 - Verfahren zum Herstellen einer Giessform - Google Patents

Verfahren zum Herstellen einer Giessform Download PDF

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Publication number
EP0133211B1
EP0133211B1 EP84107313A EP84107313A EP0133211B1 EP 0133211 B1 EP0133211 B1 EP 0133211B1 EP 84107313 A EP84107313 A EP 84107313A EP 84107313 A EP84107313 A EP 84107313A EP 0133211 B1 EP0133211 B1 EP 0133211B1
Authority
EP
European Patent Office
Prior art keywords
moulding material
casting
process according
sand
molding
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
Application number
EP84107313A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0133211A1 (de
Inventor
Gerhard Müller-Späth
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.)
Individual
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
Priority to AT84107313T priority Critical patent/ATE23283T1/de
Publication of EP0133211A1 publication Critical patent/EP0133211A1/de
Application granted granted Critical
Publication of EP0133211B1 publication Critical patent/EP0133211B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • B22C9/068—Semi-permanent moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • 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 producing a casting mold with chemically bound molding material using a model.
  • the closest prior art forming the preamble of claim 1 is generally known.
  • a cavity is created in the molding material as part of a molding space for the casting and this molding space is filled with liquid metal, a fine zone being formed in the molding material being influenced by the casting temperature.
  • a number of methods for producing castings from liquid metal in a casting mold are known to the person skilled in the art, the molding space being formed with the aid of a free-flowing molding sand which has been admixed with binder and a model which has been temporarily introduced therein.
  • sand casting hand molding process molding is carried out in the molding sand with continuous mixers and manual interventions, with a hand tamper, pneumatic tamper or sling, a mold that can be used once is created.
  • casting molds and core are produced by means of molding or core shooting machines. Casting sand as a molding medium is introduced and compacted in molds by shaking, pressing under vacuum or by explosions. Core forms are mostly imposed. The mold and core can only be used once.
  • Mask mold casting requires heated metal models and core boxes for the production of mask molds and mask cores from synthetic resin-bonded sands. Again, each mask and each core can only be used once.
  • the full mold casting process uses single-use models cut out of synthetic foam, which are molded in according to the hand molding process, but remain in the mold. Foundry sands with cold-curing binders, for example, are used as molding materials. This process is suitable for the individual production of medium and large castings as well as for series production if foamed models are prefabricated in special molds as standard.
  • Chemically bound sand molds are used with great success in manual molding, for one-off production and for core production.
  • chemically bound sand molds are found as masks, which are supported by mask shells or gas-permeable backfill materials, for example by loose sand or steel gravel.
  • the inventor has now set itself the goal of creating a method for producing a casting mold of the type mentioned at the outset - and thus of castings - which makes it possible, in particular for the series production of castings, to use clay-based sands Avoidance of the disadvantages mentioned and offer a gas permeability which is simple to manufacture and inexpensive, with a low consumption of molding material, and sufficient gas permeability, which also guarantees high casting quality with low environmental impact.
  • the solution to this problem is specified in the characterizing part of claim 1.
  • at least the portion of the molding material which has become free-flowing in the zone influenced by the casting temperature is removed from a first molding mold after casting a first casting.
  • the remaining part of the molding material is left and the cavity created when the model is inserted is filled with molding material before the next casting process to restore the molding space.
  • the portion of the molding material which has been thermally influenced in an adjacent zone can advantageously also be removed in its strength.
  • the chemically bound molding material is molding sand.
  • the model is molded during the first cycle, and the molding material or molding sand can be introduced in the usual manner, for example by firing and suction. Then the casting mold is finished in a known manner - if necessary -, supplemented with cores and put together.
  • the casting mold - as is known - is passed through a cooling section, then divided and the solidified casting is removed.
  • the proportion of molding material which has become free-flowing due to the casting temperature in the immediate vicinity of the castings, and the molding material of a subsequent outer zone, which also has reduced strength, and which disintegrates without major influence, are now swept out, blown out or poured out;
  • the part of the molding material that is hardly thermally loaded is left in the mold and forms a backfilling compound with all the advantages of a conventional sand mold (gas permeability, etc.) from the second mold cycle.
  • the casting mold is produced with a uniform molding material and, on the other hand, the portion of the molding material lying in the thermally influenced zone is removed, preferably without the use of mechanical tools, and this thermally influenced zone is filled up with the same molding material becomes.
  • the portion of the molding material removed from the thermally influenced zone is regenerated and returned to this zone.
  • the described method can be used with a standard mold box size, since the necessary cavity between the model and the remaining shell is formed by the thermal stress on the liquid metal.
  • the use of displacement bodies resulting in filling quantities - for example inflatable tubes, old sand tubers, coarse sand, styrofoam with the associated handling effort - can be omitted.
  • the mold only has to be freed from the molding material when changing to a larger model; the box halves can e.g. B. blasted clean in the blasting house, a rash is also conceivable.
  • This process reduces the amount of molding material required to such an extent that a sand / casting ratio below 2: 1 is achieved; In the green sand process, sand / casting ratios of 12: 1 are not uncommon. The reduction in molding material by the process according to the invention is remarkable.
  • a mold box 1 indicated in the drawing for casting a casting comprises a lower box 2 and an upper box 3, the free edges 4,5 of which are placed one on top of the other and which are connected by means of guide pins 8 which are seated in cantilever plates 6 and are penetrated by a wedge 7.
  • the molding box 1 surrounds a molding material bed 10 made of cold resin-bonded quartz sand, in the center of which a molding space 11 with a core 12 for the later casting G can be seen.
  • a gate for liquid metal is designated 13; Feeders, pouring pools and the like are neglected in the drawing for reasons of clarity.
  • the molding material changes in the area adjacent to the metal: the molding material immediately adjacent to the casting G disintegrates in an inner zone J under the influence of the heat of casting into a sand-like pile, encrusted in a second - in the Drawing highlighted in black - zone A, outside of which the molding material of the molding bed 10 is exposed to such a low thermal load that it - and with it the strength of the molded bed part formed by it in a zone B - remains essentially unchanged.
  • the upper box 3 is lifted from the lower box 2 and turned away (Fig. 3).
  • Molded material of the former mold bed 10 can be removed without further ado, for example, by blowing it out. Also the somewhat more solid, but in comparison to its original strength loosened part of the molding material in the thermally influenced zones J, A can be easily removed over its entire width e, so that the width i of the molding space 11 both in the area of the lower molding part 11 ; and also the upper mold space divider 11 h is then expanded by that width e on both sides of the mold box center line M.
  • the recesses formed in this way are designated in FIGS. 4, 5 with 20 t and 20 h .
  • a model 31 hanging on a model plate 30 is then inserted into the recesses 20 t , 20 h ; between the remaining zone B of the molding bed 10 and the model 31 or an insertion plug 32 in the area of the sprue 13 there remains a filling spout 33 of that width e, which - as indicated at 15 - is now filled with molding material; after the molding material portion 15 has been filled in (see FIG. 6), the shape of the original molding space 11 is restored for a new casting process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Glass Compositions (AREA)
  • Casting Devices For Molds (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Toys (AREA)
  • Lock And Its Accessories (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
EP84107313A 1983-07-01 1984-06-26 Verfahren zum Herstellen einer Giessform Expired EP0133211B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84107313T ATE23283T1 (de) 1983-07-01 1984-06-26 Verfahren zum herstellen einer giessform.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3323697 1983-07-01
DE3323697A DE3323697C1 (de) 1983-07-01 1983-07-01 Verfahren zum Herstellen eines Giessstueckes in einer Giessform

Publications (2)

Publication Number Publication Date
EP0133211A1 EP0133211A1 (de) 1985-02-20
EP0133211B1 true EP0133211B1 (de) 1986-11-05

Family

ID=6202858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107313A Expired EP0133211B1 (de) 1983-07-01 1984-06-26 Verfahren zum Herstellen einer Giessform

Country Status (18)

Country Link
US (1) US4620582A (enrdf_load_stackoverflow)
EP (1) EP0133211B1 (enrdf_load_stackoverflow)
JP (1) JPS6087949A (enrdf_load_stackoverflow)
KR (1) KR920001706B1 (enrdf_load_stackoverflow)
AT (1) ATE23283T1 (enrdf_load_stackoverflow)
AU (1) AU564197B2 (enrdf_load_stackoverflow)
BR (1) BR8403249A (enrdf_load_stackoverflow)
CA (1) CA1219728A (enrdf_load_stackoverflow)
CS (1) CS264106B2 (enrdf_load_stackoverflow)
DD (1) DD219690A5 (enrdf_load_stackoverflow)
DE (2) DE3323697C1 (enrdf_load_stackoverflow)
ES (1) ES533845A0 (enrdf_load_stackoverflow)
HU (1) HU189416B (enrdf_load_stackoverflow)
IN (1) IN161531B (enrdf_load_stackoverflow)
PL (1) PL143301B1 (enrdf_load_stackoverflow)
TR (1) TR22403A (enrdf_load_stackoverflow)
YU (1) YU45631B (enrdf_load_stackoverflow)
ZA (1) ZA844612B (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6463991B1 (en) * 1999-07-02 2002-10-15 International Engine Intellectual Property Company, L.L.C. Iron alloy casting method and apparatus
CN1362901A (zh) * 2000-01-28 2002-08-07 新东工业株式会社 破碎湿砂铸型以及分离造型材料和湿砂的方法和装置
US6712119B2 (en) * 2000-03-02 2004-03-30 Sintokogio, Ltd. Collected sand processing method
DE10221074B4 (de) 2002-05-10 2004-08-05 Dihag Deutsche Giesserei- Und Industrie-Holding Ag Gießform zur Herstellung eines Gußteils unter Verwendung von Formgrundstoff und Verwendung einer solchen Gießform
DE10352180B4 (de) * 2003-11-05 2006-03-02 Dihag Deutsche Giesserei- Und Industrie-Holding Ag Gießverfahren zur Herstellung eines Gußteils
GB0607228D0 (en) * 2006-04-11 2006-05-17 Rolls Royce Plc A method of manufacturing a hollow article
DE102008017657A1 (de) * 2008-04-05 2009-10-29 Evosteel Gmbh Gießform zur Herstellung eines Gußbauteils und Verfahren zur Herstellung einer Gießform
CN103302254B (zh) * 2013-06-26 2015-10-14 安徽祝成动力机械有限公司 一种钢模覆砂浇铸法
DE102014110826A1 (de) * 2014-07-30 2016-02-04 Fritz Winter Eisengiesserei Gmbh & Co. Kg Verfahren zum Gießen von Gussteilen
CN105081222A (zh) * 2015-08-28 2015-11-25 太仓市顺昌锻造有限公司 铸造模具
DE202017107670U1 (de) * 2017-12-18 2019-03-20 Lothar Thoni Drehgestellrahmen für Schienenfahrzeuge aus einem Aluminiumgussteil
CN112371959A (zh) * 2020-10-26 2021-02-19 芜湖久弘重工股份有限公司 一种预清理缸体水套内腔残砂装置及方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE804702C (de) * 1948-12-11 1951-04-26 Josef Gaebel Sand-Sparform
DE870598C (de) * 1949-01-01 1953-03-16 Josef Gaebel Verfahren zum Herstellen von Giessformen
DE969774C (de) * 1951-03-13 1958-07-17 Croning & Co Verfahren zur Herstellung von Giessformen
US3302919A (en) * 1965-11-12 1967-02-07 Abex Corp Apparatus for casting metal wheels
US3498366A (en) * 1966-08-05 1970-03-03 Amsted Ind Inc Graphite mold having resin-bonded sand portions
JPS49118619A (enrdf_load_stackoverflow) * 1973-03-15 1974-11-13
JPS5059224A (enrdf_load_stackoverflow) * 1973-09-27 1975-05-22
JPS5062124A (enrdf_load_stackoverflow) * 1973-10-06 1975-05-28
DE2405113C3 (de) * 1974-02-02 1980-02-14 Alb. Klein Kg, 5241 Niederfischbach Verfahren zur Rückgewinnung von mit Bindemittel versetztem Formstoff sowie Anlage zur Durchführung des Verfahrens
DE2518155C2 (de) * 1975-04-24 1984-05-24 Klöckner-Humboldt-Deutz AG, 5000 Köln Gießform in geteilter, wiederverwendbarer Ausführung
JPS564343A (en) * 1979-06-22 1981-01-17 Hitachi Ltd Method of manufacturing mold
JPS604262B2 (ja) * 1981-02-21 1985-02-02 マツダ株式会社 アルミニウム合金製鋳物の製造法

Also Published As

Publication number Publication date
ATE23283T1 (de) 1986-11-15
YU114384A (en) 1988-08-31
AU564197B2 (en) 1987-08-06
PL248514A1 (en) 1985-04-09
CS505284A2 (en) 1988-09-16
US4620582A (en) 1986-11-04
KR850001043A (ko) 1985-03-14
CS264106B2 (en) 1989-06-13
IN161531B (enrdf_load_stackoverflow) 1987-12-19
HUT35562A (en) 1985-07-29
DD219690A5 (de) 1985-03-13
ES8503536A1 (es) 1985-03-01
TR22403A (tr) 1987-04-13
JPH0442106B2 (enrdf_load_stackoverflow) 1992-07-10
YU45631B (sh) 1992-07-20
BR8403249A (pt) 1985-06-11
CA1219728A (en) 1987-03-31
JPS6087949A (ja) 1985-05-17
KR920001706B1 (ko) 1992-02-24
EP0133211A1 (de) 1985-02-20
HU189416B (en) 1986-07-28
DE3461147D1 (en) 1986-12-11
PL143301B1 (en) 1988-02-29
AU3002584A (en) 1985-01-03
ES533845A0 (es) 1985-03-01
DE3323697C1 (de) 1985-02-28
ZA844612B (en) 1985-04-24

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