EP0233478B1 - Giessform, Verfahren zur ihrer Herstellung und Giessverfahren - Google Patents

Giessform, Verfahren zur ihrer Herstellung und Giessverfahren Download PDF

Info

Publication number
EP0233478B1
EP0233478B1 EP19870100559 EP87100559A EP0233478B1 EP 0233478 B1 EP0233478 B1 EP 0233478B1 EP 19870100559 EP19870100559 EP 19870100559 EP 87100559 A EP87100559 A EP 87100559A EP 0233478 B1 EP0233478 B1 EP 0233478B1
Authority
EP
European Patent Office
Prior art keywords
mold
calcia
metal
casting
chill plate
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
EP19870100559
Other languages
English (en)
French (fr)
Other versions
EP0233478A1 (de
Inventor
Seiju Uchida
Akio Hashimoto
Gen Okuyama
Toru Degawa
Takashi Sato
Kozo Fujiwara
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.)
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Mitsui Engineering and Shipbuilding Co Ltd
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
Priority claimed from JP766286A external-priority patent/JPH0628775B2/ja
Priority claimed from JP766486A external-priority patent/JPH0628776B2/ja
Priority claimed from JP766186A external-priority patent/JPH0628774B2/ja
Priority claimed from JP765886A external-priority patent/JPS62168659A/ja
Priority claimed from JP765986A external-priority patent/JPS62168628A/ja
Priority claimed from JP766386A external-priority patent/JPS62168630A/ja
Priority claimed from JP766086A external-priority patent/JPS62168632A/ja
Priority claimed from JP1091686A external-priority patent/JPH0635029B2/ja
Application filed by Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Publication of EP0233478A1 publication Critical patent/EP0233478A1/de
Application granted granted Critical
Publication of EP0233478B1 publication Critical patent/EP0233478B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • 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
    • B22C9/061—Materials which make up the mould

Definitions

  • the present invention relates to a casting method using a mold containing calcia (CaO).
  • a method of making a calcia mold comprising compacting calcia particles, containing no more than 20% fused magnesia, not more than 3% fused silica, not more than 2% of oxide other than calcia, magnesia and silica, and not more than 0.5% of material other than oxide and thereafter sintering by firing the article throughout a temperature of at teast 120°C.
  • an active metal such as titanium and zirconium
  • a mold reaction occurs and in the case of a magnesium containing and/or zirconium containing mold oxygen will be set free which contaminates the surface of the casting.
  • Such a contamination of the surface of a casting requires a step of removing the contaminated layer from the surface, thereby rendering the manufacturing process complicated and costly.
  • a mold comprising portions which are open at the base of the mold.
  • the base rests on a spacer that in turn rests on a chill plate.
  • the mold is porous and has high heat retaining properties and because the mold has a metal chill plate at the bottom, the molten metal solidifies directionally, so that the yield of the product is high.
  • the active metal does not react on the mold even if it is cooled very slowly, since the mold is mainly composed of calcia.
  • Figure 1 is an explanatory side elevational view of an embodiment according to the present invention
  • Figure 2 is an explanatory side elevational view of a further embodiment according to the inventive method.
  • Figs. 1 and 2 are respectively side elevational views of preferred embodiments of the casting method.
  • a bottomless calcia mold 31 (having a cylindrical configuration and the cavity has a slightly tapered configuration toward the lower side in this embodiment) is placed on a metal chill plate 32, and a riser sleeve 33 of the same calcia is placed on the upper side of the mold 31.
  • the metal chill plate 32 in Fig. 1 is a single-sheet plate, and the central part of the upper surface is recessed in this embodiment for receiving the calcia mold 31 (the recessed portion is not essential).
  • the embodiment shown in Fig. 2 has the same structure as that of the embodiment in Fig. 1 except that an insulating member 34 is used in place of the calcia riser sleeve 33.
  • a molten metal is poured into the bottomless calcia mold 31 by top-pouring.
  • the poured molten metal is cooled by the metal chill plate 32 and gradually solidified from the lower part.
  • the cooling speed is higher than that of a calcia mold having no metal chill plate, so that the position of the shrinkage cavity becomes higher.
  • the riser of the mold is insulated by the calcia riser sleeve 33 or the insulating member 34, whereby the position of the shrinkage cavity become even higher.
  • the calcia riser sleeve 33 and the insulating member 34 may incorporate a heating medium, or the calcia riser sleeve 33 and the insulating member 34 may have a structure which is capable of heating so as to retain the heat of the riser of the mold by providing heat therefor. It will be possible to make the position of the shrinkage cavity still higher by heating in this way.
  • a calcia mold which is made by molding a calcia particulate molding material together with an appropriate non-aqueous binder, and baking the molded body is preferably used.
  • the calcia particulate molding material preferably contains not less than 60 %, more preferably not less than 80 % calcia.
  • a high-purity calcia mold containing not less than 90 % calcia is preferably used.
  • the metal chill plate 32 ordinary steel plate, cast iron plate, copper plate and the like are preferable. In the case of using a metal chill plate of a water-cooling system, a copper plate is preferable.
  • a graphite insulating member facilitates the heating and the heat retaining of the riser of the mold by electrically heating or induction heating.
  • a calcia insulating member is used, if the member is made of metal powder which is mixed, molded and baked, heat retaining is also possible by induction heating.
  • the calcia mold has a porosity of 30 to 70 vol%, more preferably about 40 to 50 vol%.
  • a chromium alloy was poured in accordance with the embodiments shown in Figs. 1 and 2.
  • the dimensions of the mold 31, the metal chill plate 32 and the insulating member 34 are described in Figs. 1 and 2.
  • the riser sleeve 33 was an insulating sleeve made of calcia which was the same material as that of the mold.
  • the metal chill plates 32 in Figs. 1 and 2 were made of copper.
  • the shrinkage cavity in Fig. 1 was produced at a position 1.4 cm deep from the top surface of the mold, and the shrinkage cavity in Fig. 6 at a position 0 cm deep from the top surface of the mold 31.
  • a chromium alloy was poured in the same way as in the method shown in Fig. 2 except that the bottom part of the mold 31 was closed by a calcia refractory material in place of the metal chill plate 32. As a result, the shrinkage cavity was produced at a position of 2.8 cm deep from the top surface of the mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (2)

  1. Gießverfahren mit den Stufen:
    Stellen einer porösen Gießform (31) ohne Boden aus Kalziumoxid mit einer Porösität von 30 bis 70 Vol.-% auf eine metallene Schreckplatte (32), Gießen einer Metallschmelze durch fallenden Guß und allmähliches Erstarren der Metallschmelze von einem unteren Teil an, während der Steiger der Gießform isoliert ist.
  2. Verfahren nach Anspruch 1, wobei die Gießform nicht weniger als 60 Gew.-% CaO enthält.
EP19870100559 1986-01-17 1987-01-16 Giessform, Verfahren zur ihrer Herstellung und Giessverfahren Expired EP0233478B1 (de)

Applications Claiming Priority (16)

Application Number Priority Date Filing Date Title
JP766486A JPH0628776B2 (ja) 1986-01-17 1986-01-17 鋳 型
JP7664/86 1986-01-17
JP766186A JPH0628774B2 (ja) 1986-01-17 1986-01-17 鋳 型
JP765886A JPS62168659A (ja) 1986-01-17 1986-01-17 カルシア鋳型を用いた鋳込方法
JP7663/86 1986-01-17
JP7662/86 1986-01-17
JP7661/86 1986-01-17
JP765986A JPS62168628A (ja) 1986-01-17 1986-01-17 鋳型、鋳型の製造方法及び鋳造方法
JP7659/86 1986-01-17
JP766386A JPS62168630A (ja) 1986-01-17 1986-01-17 鋳型
JP7658/86 1986-01-17
JP766286A JPH0628775B2 (ja) 1986-01-17 1986-01-17 鋳 型
JP766086A JPS62168632A (ja) 1986-01-17 1986-01-17 多孔質カルシア鋳型の製造方法
JP7660/86 1986-01-17
JP1091686A JPH0635029B2 (ja) 1986-01-21 1986-01-21 カルシア鋳型の製造方法
JP10916/86 1986-01-21

Publications (2)

Publication Number Publication Date
EP0233478A1 EP0233478A1 (de) 1987-08-26
EP0233478B1 true EP0233478B1 (de) 1991-04-24

Family

ID=27571615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870100559 Expired EP0233478B1 (de) 1986-01-17 1987-01-16 Giessform, Verfahren zur ihrer Herstellung und Giessverfahren

Country Status (2)

Country Link
EP (1) EP0233478B1 (de)
DE (1) DE3769489D1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2624770B1 (fr) * 1987-12-16 1990-12-28 Ebauchesfabrik Eta Ag Procede de realisation d'un moule destine a la fabrication de pieces de tres petites dimensions
JP6083521B2 (ja) * 2013-04-16 2017-02-22 国立大学法人富山大学 Ａｌ−Ｌｉ系合金の製造方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1902419A (en) * 1931-07-30 1933-03-21 Dow Chemical Co Molding composition and method of treating
US2201366A (en) * 1939-08-02 1940-05-21 Vladimir A Grodsky Mold composition and method of producing same
US2876122A (en) * 1953-08-26 1959-03-03 Norton Co Calcium oxide articles and method of making the same
GB1122307A (en) * 1965-07-19 1968-08-07 Foseco Trading Ag Production of moulds for metal casting
DE2047041A1 (en) * 1969-09-26 1971-04-01 Toyoda Chuo Kenkyusho Kk Iron melt containers with protective oxide - layers
GB1346576A (en) * 1971-04-19 1974-02-13 Secr Defence Method of making a mould or mould piece
US3981346A (en) * 1974-10-03 1976-09-21 United Technologies Corporation Method and apparatus for directional solidification
JPS592209B2 (ja) 1977-06-03 1984-01-17 日本電気株式会社 Ｐｌｌ発振回路

Also Published As

Publication number Publication date
EP0233478A1 (de) 1987-08-26
DE3769489D1 (de) 1991-05-29

Similar Documents

Publication Publication Date Title
US6640876B2 (en) Method and apparatus for manufacturing copper and/or copper alloy ingot having no shrinkage cavity and having smooth surface without wrinkles
US4867224A (en) Method of manufacturing castings of active metal or alloy thereof having unidirectional solidification structure
US3311956A (en) Casting process employing soluble cores
EP0233478B1 (de) Giessform, Verfahren zur ihrer Herstellung und Giessverfahren
CA1207124A (en) Metal founding
US3434527A (en) Method for ultra-high purity precision casting
JPS585749B2 (ja) 純チタンまたはチタンを主成分とする合金からなるチタン鋳造品の鋳造方法
AU633154B2 (en) Method of controlling the rate of heat extraction in mould casting
EP0457502B1 (de) Vorrichtung und Verfahren zum Präzisionsgiessen
US2004378A (en) Method of making refractory products and the like
JPS62168659A (ja) カルシア鋳型を用いた鋳込方法
US3372898A (en) Metal casting system with anhydrous calcium chloride core
JPS63140740A (ja) 高融点活性金属鋳造用鋳型
TW562714B (en) Method and apparatus for manufacturing copper and/or copper alloy ingot having no shrinkage cavity and having smooth surface without wrinkles
JPS5521510A (en) Manufacture of manganese or manganese-base alloy ingot
GB1325467A (en) Moulded refractory bodies and their production
Uchida et al. Mold, Method of Producing Mold and Casting Method
JPS6363547A (ja) ブロツクモ−ルド法の鋳型用組成物
SU1717591A1 (ru) Способ изготовлени плавленолитных огнеупоров
JP2778760B2 (ja) スライディングノズル用プレートれんが
Tisdale Jr Apparatus and Method for Producing Ingot Mold Caps
JPH038958Y2 (de)
JPS56122662A (en) Preventing method of casting crack of antiferromagnetic chromium invar alloy ingot
JPS60174245A (ja) 複合鋳物の製造法
CN110421694A (zh) 一种液态浇注成型的工程陶瓷生产工艺方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19880218

17Q First examination report despatched

Effective date: 19890724

ITF It: translation for a ep patent filed

Owner name: FIAMMENGHI - DOMENIGHETTI

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REF Corresponds to:

Ref document number: 3769489

Country of ref document: DE

Date of ref document: 19910529

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 87100559.1

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20001229

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010118

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010124

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010228

Year of fee payment: 15

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020801

EUG Se: european patent has lapsed

Ref document number: 87100559.1

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050116