EP0073441B1 - Dauerform, insbesondere eine metallische Kokille - Google Patents

Dauerform, insbesondere eine metallische Kokille Download PDF

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Publication number
EP0073441B1
EP0073441B1 EP82107688A EP82107688A EP0073441B1 EP 0073441 B1 EP0073441 B1 EP 0073441B1 EP 82107688 A EP82107688 A EP 82107688A EP 82107688 A EP82107688 A EP 82107688A EP 0073441 B1 EP0073441 B1 EP 0073441B1
Authority
EP
European Patent Office
Prior art keywords
mould
permanent
feeder
chill
casting
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
EP82107688A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0073441A1 (de
Inventor
Ivo Dipl.-Ing. Henych
Erwin Fischer
Eduard Rogg
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.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
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 Georg Fischer AG filed Critical Georg Fischer AG
Priority to AT82107688T priority Critical patent/ATE13393T1/de
Publication of EP0073441A1 publication Critical patent/EP0073441A1/de
Application granted granted Critical
Publication of EP0073441B1 publication Critical patent/EP0073441B1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/088—Feeder heads

Definitions

  • the present invention relates to a permanent mold known per se, in particular a metallic mold, which has at least one opening for receiving a feeder insert.
  • the seal feed of the castings made of metals and alloys, which have a volume deficit during solidification, must be ensured by the feeder.
  • the feeders must be the last, i.e. solidify only after the casting has solidified in order to ensure the sealing feed. For this reason, so-called lost heads are used in steel mill chillers, Feeder used.
  • Cover plates which contain feeder inserts, are used, as described in DE-PS No. 2622891. These cover plates form the upper part of the mold during casting. After the casting process has been completed, before the casting has completely solidified, these cover plates with the casting are removed from the mold. This frees the mold for the next casting process before the casting solidifies.
  • the figure shows a cross section through a permanent mold, in particular a metallic mold.
  • a feeder insert 2 is inserted into an opening provided in the upper part of the mold.
  • a crushing core 4 is arranged between the feeder insert 2 and the mold interior 5.
  • a cavity 3 between the feeder insert 2 and the surrounding mold wall 1 a is provided by a recess in the mold wall 1. This recess is open towards the mold interior 5 and serves to receive the liquid metal penetrating from the mold interior 5.
  • Cavities in the upper part of the mold or groove-like passages between the crusher core and the feeder insert or in the crusher core serve to fill the cavity 3 with the liquid metal.
  • the condition for unpacking the casting before the feeders solidify is that they have a firm connection to the casting.
  • This results from controlled spring formation i.e. a thin sleeve made of cast material is formed around the feeder insert 2.
  • the required gap size is determined by the fluidity of the cast material and can be between 0.5 and 10, preferably between 0.5 and 5 mm.
  • Another criterion is the easy removal of the bushing without the risk of breaking into the casting by tapping it simultaneously with the feeder. Due to the sleeve made of cast metal surrounding the feeder insert or part of the feeder insert, it is firmly connected to the casting and the outflow is thereby prevented.
  • the adaptation of the casting speed to the heat transfer between the mold and the casting takes place in such a way that the solidification zone follows the casting zone approximately in the saturation length of the feeder. This allows the volume of the feeder to be kept to a minimum.
  • the required feeder module can be determined using the following formula:
  • the dwell time of the casting in the mold can be significantly reduced by precisely coordinating the setting times. It makes it easier to unpack the castings by ejecting them instead of lifting them out of the mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Pens And Brushes (AREA)
  • Pinball Game Machines (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cable Accessories (AREA)
  • Processing Of Terminals (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP82107688A 1981-08-25 1982-08-23 Dauerform, insbesondere eine metallische Kokille Expired EP0073441B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107688T ATE13393T1 (de) 1981-08-25 1982-08-23 Dauerform, insbesondere eine metallische kokille.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5466/81 1981-08-25
CH546681 1981-08-25

Publications (2)

Publication Number Publication Date
EP0073441A1 EP0073441A1 (de) 1983-03-09
EP0073441B1 true EP0073441B1 (de) 1985-05-22

Family

ID=4294080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107688A Expired EP0073441B1 (de) 1981-08-25 1982-08-23 Dauerform, insbesondere eine metallische Kokille

Country Status (8)

Country Link
EP (1) EP0073441B1 (ko)
JP (1) JPS5841647A (ko)
KR (1) KR840000918A (ko)
AT (1) ATE13393T1 (ko)
AU (1) AU553844B2 (ko)
BR (1) BR8204949A (ko)
CA (1) CA1196468A (ko)
DE (1) DE3263758D1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA831208B (en) * 1982-03-09 1983-11-30 Fischer Ag Georg Permanent metal mold with vertically arranged cavities
JPS61168532A (ja) * 1984-08-23 1986-07-30 Sakai Chem Ind Co Ltd 磁気記録用バリウムフェライト微結晶の製造方法
GB8512514D0 (en) * 1985-05-17 1985-06-19 Foseco Int Molten metal casting & feeder sleeves

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1369947A (en) * 1920-08-02 1921-03-01 Union Steel Casting Company Method of making sand molds
FR869518A (fr) * 1939-07-14 1942-02-04 Rudolf Rautenbach Procédé pour la coulée de pièces métalliques moulees
DE2309016A1 (de) * 1973-02-23 1974-08-29 Eduard Dr Ing Baur Verfahren und vorrichtung zur waermeisolation eines trichters an gusstuecken

Also Published As

Publication number Publication date
ATE13393T1 (de) 1985-06-15
JPS5841647A (ja) 1983-03-10
DE3263758D1 (en) 1985-06-27
KR840000918A (ko) 1984-03-26
AU8758482A (en) 1983-03-03
CA1196468A (en) 1985-11-12
AU553844B2 (en) 1986-07-31
BR8204949A (pt) 1983-08-02
EP0073441A1 (de) 1983-03-09

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