EP0031334B1 - Kokille mit kernzug - Google Patents

Kokille mit kernzug Download PDF

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Publication number
EP0031334B1
EP0031334B1 EP80901145A EP80901145A EP0031334B1 EP 0031334 B1 EP0031334 B1 EP 0031334B1 EP 80901145 A EP80901145 A EP 80901145A EP 80901145 A EP80901145 A EP 80901145A EP 0031334 B1 EP0031334 B1 EP 0031334B1
Authority
EP
European Patent Office
Prior art keywords
core
stud
mold
mold according
holding device
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
EP80901145A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0031334A1 (de
Inventor
Ivo Henych
Erwin Fischer
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
Publication of EP0031334A1 publication Critical patent/EP0031334A1/de
Application granted granted Critical
Publication of EP0031334B1 publication Critical patent/EP0031334B1/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
    • B22C9/10—Cores; Manufacture or installation of cores
    • 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
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/24—Accessories for locating and holding cores or inserts

Definitions

  • the invention relates to a mold with at least one core pull in its wall.
  • Core trains in molds are known and have u. a. the advantage that they are placed and fixed exactly in the mold cavity and do not slip.
  • Cantilever cavities d. H. however, those that enlarge into the mold cavity cannot be produced. However, they are particularly important as anchoring slots or the like for wear parts which consist of hard cast materials, since these cannot be machined with the usual tools.
  • cantilevered cavities had to be formed with the aid of sand cores, but this is not without problems. Solidification and saturation are disturbed by the different thermal conductivities of molding material and metal. Accurate fixation (securing against floating) and positioning using core brands and gas formation also pose difficulties.
  • a slidable core holder which can be made of metal, among other things. Since this holder described is designed for sand molds, it is immovable and non-retractable during solidification. This core holder is therefore not suitable for permanent forms. In contrast to sand molds, a permanent retraction of the core holder during solidification is necessary in order to allow the casting to shrink freely.
  • a mold has, in its side wall 1, two slidable core pulls 2 and 3, each with a core holder 7, a pin 9 projecting into the cavity 8 of the mold, both made of metal and advantageously made of a copper-chromium alloy (CuCrl), and one Have sleeve 10 made of core sand.
  • the pin 9 can be screwed into the core holder 7 by means of a screw pin 15 (core pull 2) or pin 9 and holder 7 can be formed together from one piece (core pull 3). The sleeve 10 is pushed onto the retracted pin from the mold cavity.
  • the core pull 2 or 3 is extended in accordance with the arrow 16, the sand sleeve 10 remaining in the casting.
  • the sleeve 10 cannot twist.
  • the sleeve 10 must be secured against rotation on the pin 9 and the holder 7 must be retractable and retractable.
  • the holder 7 therefore has two longitudinal grooves 17 (core pull 2).
  • the pin 9, which tapers for easier attachment and for better detachment or stripping from the sleeve 10 when extended to its free end opposite the holder 7, has a round shape, as shown in FIG. 2, lower half Cross-section and longitudinal ribs 21 thereon.
  • a non-circular cross-section, for example a square pin 9a shown in FIG. 2, upper half, can effectively counter rotation of the sleeve 10; Longitudinal ribs 21 are then not required.
  • an adhesive for example water glass or dextrin, can connect the sleeve 10 to the pin 9.
  • the core pull 3 has a separate water cooling. Water is supplied through a central tube 24 which extends into the free end region of the pin 9. An annular groove 25 is also milled out in the end face of the holder 7, where the sand sleeve 10 abuts, via the core gases a line 26 can be discharged outdoors. The core gases can also be drawn off through line 26.
  • the core pulls can also be retracted and extended at an angle with respect to the wall 1. It is also possible to produce a continuous, cantilevered cavity in the central region by moving two core pulls 3 according to the invention, from opposite walls, onto one another so that they just touch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Casting Devices For Molds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Coloring (AREA)
EP80901145A 1979-07-05 1981-01-26 Kokille mit kernzug Expired EP0031334B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH628979A CH640160A5 (de) 1979-07-05 1979-07-05 Kokille mit kernzug.
CH6289/79 1979-07-05

Publications (2)

Publication Number Publication Date
EP0031334A1 EP0031334A1 (de) 1981-07-08
EP0031334B1 true EP0031334B1 (de) 1983-06-15

Family

ID=4307207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80901145A Expired EP0031334B1 (de) 1979-07-05 1981-01-26 Kokille mit kernzug

Country Status (7)

Country Link
US (1) US4462455A (enExample)
EP (1) EP0031334B1 (enExample)
JP (1) JPS56500765A (enExample)
AT (1) ATE3758T1 (enExample)
CH (1) CH640160A5 (enExample)
DE (1) DE3063764D1 (enExample)
WO (1) WO1981000067A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105945535A (zh) * 2016-05-30 2016-09-21 方雪锋 一种传动轴突缘叉加工方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074646B2 (ja) * 1989-02-20 1995-01-25 リョービ株式会社 高圧鋳造用砂中子及びその製造方法
AU677903B2 (en) * 1994-06-01 1997-05-08 Toyota Jidosha Kabushiki Kaisha Casting method with improved resin core removing step and apparatus for performing the method
JPH0871699A (ja) * 1994-09-07 1996-03-19 Shinmori Shoji Kk 鋳造金型の中子支持体
JP3274069B2 (ja) * 1996-02-09 2002-04-15 リョービ株式会社 クローズドデッキタイプシリンダブロック鋳造装置と該装置に用いられる砂中子との組合せ
DE102011079356A1 (de) * 2011-07-18 2013-01-24 Mahle International Gmbh Gießkern einer Gussform zur Herstellung eines Zylinders
CN105921958B (zh) * 2016-05-30 2018-10-26 河南省豫煤矿机有限公司 一种传动轴花键轴头锻造工艺
DE102018215955A1 (de) * 2018-09-19 2020-03-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Gießform zur Herstellung von wendelförmigen Gusskörpern
CN113000790A (zh) * 2021-01-19 2021-06-22 安徽省恒泰动力科技有限公司 一种活塞整体抽芯模具

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE386763C (de) * 1923-12-22 Guido Allendorf Einrichtung zum Halten von Kernen
GB775496A (enExample) *
DE392909C (de) * 1924-04-02 Guido Allendorf Einrichtung zum Halten von Kernen
US818413A (en) * 1904-03-03 1906-04-24 Arthur B Underhill Combined metal core vent and support.
FR693752A (fr) * 1930-04-11 1930-11-25 Fermiere Des Fonderies Et Acie Noyau de fonderie pour cylindres de moteurs
FR928617A (fr) * 1946-06-07 1947-12-03 Perfectionnement aux noyaux magnétiques
FR1056470A (fr) * 1952-04-30 1954-02-26 Aubry Ets Perfectionnement dans la confection des moules et noyaux de fonderie
US2752652A (en) * 1954-09-28 1956-07-03 Central States Ind Supply Comp Method of reinforcing cores, utilizing glass tubes
US3098270A (en) * 1961-04-18 1963-07-23 Nat Lead Co Die casting method and article
US3528637A (en) * 1965-08-24 1970-09-15 Microdot Inc Core set for molding a partial thread
US3374827A (en) * 1965-11-17 1968-03-26 Gen Motors Corp Method of using vaporizable core assembly spacers
GB1199673A (en) * 1968-04-20 1970-07-22 Ford Motor Co Method of Casting a Light Metal
FR1597446A (enExample) * 1968-08-19 1970-06-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105945535A (zh) * 2016-05-30 2016-09-21 方雪锋 一种传动轴突缘叉加工方法

Also Published As

Publication number Publication date
US4462455A (en) 1984-07-31
DE3063764D1 (en) 1983-07-21
ATE3758T1 (de) 1983-06-15
EP0031334A1 (de) 1981-07-08
JPS56500765A (enExample) 1981-06-11
WO1981000067A1 (fr) 1981-01-22
CH640160A5 (de) 1983-12-30

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