EP0133211A1 - Procédé pour la production de moules - Google Patents

Procédé pour la production de moules Download PDF

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Publication number
EP0133211A1
EP0133211A1 EP84107313A EP84107313A EP0133211A1 EP 0133211 A1 EP0133211 A1 EP 0133211A1 EP 84107313 A EP84107313 A EP 84107313A EP 84107313 A EP84107313 A EP 84107313A EP 0133211 A1 EP0133211 A1 EP 0133211A1
Authority
EP
European Patent Office
Prior art keywords
molding material
casting
molding
moulding material
mold
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.)
Granted
Application number
EP84107313A
Other languages
German (de)
English (en)
Other versions
EP0133211B1 (fr
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.)
MUELLER SPAETH GERHARD
Original Assignee
MUELLER SPAETH GERHARD
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 MUELLER SPAETH GERHARD filed Critical MUELLER SPAETH GERHARD
Priority to AT84107313T priority Critical patent/ATE23283T1/de
Publication of EP0133211A1 publication Critical patent/EP0133211A1/fr
Application granted granted Critical
Publication of EP0133211B1 publication Critical patent/EP0133211B1/fr
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 and a method for producing castings.
  • 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 zone being formed around the casting 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 manual molding process molding is carried out in the molding sand with continuous mixers and manual interventions, with a hand rammer, pneumatic rammer or sling - a one-time-use mold 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.
  • the 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.
  • Chemically bound sand molds are used with great success in manual molding, for one-off production and for core production.
  • chemically bonded sand molds can be 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 himself 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-bound To avoid sanding while avoiding the disadvantages mentioned and to offer a gas mold that is easy to manufacture and inexpensive, with a low consumption of molding material, and sufficient gas permeability, which also ensures high casting quality with low environmental impact.
  • At least that part of the molding material which has become free-flowing in the zone influenced by the casting temperature is removed from a first casting mold made from a chemically bound molding material after the casting of a first casting, the remaining part of the molding material being left and the cavity created when the model is created is filled with molding material to restore the molding space before the next casting process.
  • the portion of the molding material which - in an adjacent zone - has been reduced in strength can advantageously also be removed in addition to the free-flowing portion.
  • 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 After casting, the casting mold is passed through a cooling section, as is known, 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. be 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 directly adjacent to the casting G disintegrates in an inner zone J under the influence of the heat of casting to form a sand-like heap, encrusted in a second zone A, highlighted in black in the drawing, outside of which the molding material of the molding bed 10 is exposed to such a low thermal load is that it - and with it the strength of the molded bed part it forms in zone B - remains essentially unchanged.
  • the upper box 3 is lifted from the lower box 2 and turned away (Fig. 3).
  • Moldable material of the former mold bed 10 that has become free-flowing in the inner zone J can be removed without further ado, for example, blown out. Also, the somewhat more solid, but looser compared 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 t and of 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 resulting recesses are designated 20 t and 20 h in FIGS.
  • 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 gap 33 of that width e, which is now - as indicated at 15 - filled with molding material; after this Filling the molding material portion 15 (see FIG. 6), the shape of the original mold 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)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Toys (AREA)
  • Lock And Its Accessories (AREA)
EP84107313A 1983-07-01 1984-06-26 Procédé pour la production de moules Expired EP0133211B1 (fr)

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
DE3323697A DE3323697C1 (de) 1983-07-01 1983-07-01 Verfahren zum Herstellen eines Giessstueckes in einer Giessform
DE3323697 1983-07-01

Publications (2)

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

Family

ID=6202858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107313A Expired EP0133211B1 (fr) 1983-07-01 1984-06-26 Procédé pour la production de moules

Country Status (18)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1531021A1 (fr) * 2003-11-05 2005-05-18 Deutsche Giesserei- und Industrie-Holding AG Procédé de coulée pour la fabrication d'une pièce coulée
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

Families Citing this family (9)

* 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
KR20010113871A (ko) * 2000-01-28 2001-12-28 니시 마코토 생사 주형으로부터 주형 재료와 주형 생사를 붕괴하고분리시키는 방법 및 장치
CN1419481A (zh) * 2000-03-02 2003-05-21 新东工业株式会社 用于处理回收砂的方法
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
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2518155A1 (de) * 1975-04-24 1976-11-04 Kloeckner Humboldt Deutz Ag Giessform in geteilter, wiederverwendbarer ausfuehrung
DE3206048A1 (de) * 1981-02-21 1982-09-09 Toyo Kogyo Co. Ltd., Hiroshima Verfahren zum herstellen eines gussstueckes aus aluminiumlegierung

Family Cites Families (10)

* 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 (fr) * 1973-03-15 1974-11-13
JPS5059224A (fr) * 1973-09-27 1975-05-22
JPS5062124A (fr) * 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
JPS564343A (en) * 1979-06-22 1981-01-17 Hitachi Ltd Method of manufacturing mold

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2518155A1 (de) * 1975-04-24 1976-11-04 Kloeckner Humboldt Deutz Ag Giessform in geteilter, wiederverwendbarer ausfuehrung
DE3206048A1 (de) * 1981-02-21 1982-09-09 Toyo Kogyo Co. Ltd., Hiroshima Verfahren zum herstellen eines gussstueckes aus aluminiumlegierung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1531021A1 (fr) * 2003-11-05 2005-05-18 Deutsche Giesserei- und Industrie-Holding AG Procédé de coulée pour la fabrication d'une pièce coulée
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

Also Published As

Publication number Publication date
PL248514A1 (en) 1985-04-09
YU114384A (en) 1988-08-31
CS264106B2 (en) 1989-06-13
CA1219728A (fr) 1987-03-31
AU3002584A (en) 1985-01-03
ES8503536A1 (es) 1985-03-01
TR22403A (tr) 1987-04-13
DE3323697C1 (de) 1985-02-28
IN161531B (fr) 1987-12-19
ES533845A0 (es) 1985-03-01
JPS6087949A (ja) 1985-05-17
ZA844612B (en) 1985-04-24
KR850001043A (ko) 1985-03-14
HU189416B (en) 1986-07-28
PL143301B1 (en) 1988-02-29
JPH0442106B2 (fr) 1992-07-10
DD219690A5 (de) 1985-03-13
US4620582A (en) 1986-11-04
EP0133211B1 (fr) 1986-11-05
DE3461147D1 (en) 1986-12-11
KR920001706B1 (ko) 1992-02-24
CS505284A2 (en) 1988-09-16
HUT35562A (en) 1985-07-29
YU45631B (sh) 1992-07-20
BR8403249A (pt) 1985-06-11
AU564197B2 (en) 1987-08-06
ATE23283T1 (de) 1986-11-15

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