EP0073441B1 - Dauerform, insbesondere eine metallische Kokille - Google Patents
Dauerform, insbesondere eine metallische Kokille Download PDFInfo
- 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
Links
- 239000000155 melt Substances 0.000 claims abstract 2
- 238000005266 casting Methods 0.000 description 29
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000021056 liquid food Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
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)
- Moulds For Moulding Plastics Or The Like (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Cable Accessories (AREA)
- Processing Of Terminals (AREA)
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 |
---|---|---|---|
CH546681 | 1981-08-25 | ||
CH5466/81 | 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)
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)
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 |
-
1982
- 1982-08-23 EP EP82107688A patent/EP0073441B1/de not_active Expired
- 1982-08-23 DE DE8282107688T patent/DE3263758D1/de not_active Expired
- 1982-08-23 AT AT82107688T patent/ATE13393T1/de not_active IP Right Cessation
- 1982-08-24 CA CA000410047A patent/CA1196468A/en not_active Expired
- 1982-08-24 BR BR8204949A patent/BR8204949A/pt unknown
- 1982-08-24 KR KR1019820003809A patent/KR840000918A/ko unknown
- 1982-08-25 JP JP57146295A patent/JPS5841647A/ja active Pending
- 1982-08-25 AU AU87584/82A patent/AU553844B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
ATE13393T1 (de) | 1985-06-15 |
EP0073441A1 (de) | 1983-03-09 |
JPS5841647A (ja) | 1983-03-10 |
CA1196468A (en) | 1985-11-12 |
AU8758482A (en) | 1983-03-03 |
KR840000918A (ko) | 1984-03-26 |
DE3263758D1 (en) | 1985-06-27 |
AU553844B2 (en) | 1986-07-31 |
BR8204949A (pt) | 1983-08-02 |
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