EP0881013B1 - Verfahren zum Verbinden von mehreren Giesskernen - Google Patents

Verfahren zum Verbinden von mehreren Giesskernen Download PDF

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Publication number
EP0881013B1
EP0881013B1 EP98109522A EP98109522A EP0881013B1 EP 0881013 B1 EP0881013 B1 EP 0881013B1 EP 98109522 A EP98109522 A EP 98109522A EP 98109522 A EP98109522 A EP 98109522A EP 0881013 B1 EP0881013 B1 EP 0881013B1
Authority
EP
European Patent Office
Prior art keywords
cores
channels
mixture
welding
core
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 - Lifetime
Application number
EP98109522A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0881013A1 (de
Inventor
Julius Hansberg
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.)
FRITZ HANSBERG S.P.A.
Original Assignee
Fritz Hansberg SpA
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 Fritz Hansberg SpA filed Critical Fritz Hansberg SpA
Publication of EP0881013A1 publication Critical patent/EP0881013A1/de
Application granted granted Critical
Publication of EP0881013B1 publication Critical patent/EP0881013B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22C9/103—Multipart cores

Definitions

  • the invention relates to a method for connecting several casting cores according to the preamble of the claim 1.
  • the casting cores are made by compressing the molding material, consisting of a mixture of sand and binder in a core formwork or a core box, manufactured. Thereupon, depending on which binder used to polymerize the binder by means of heating (method with a warm core box) or by applying a suitable one gaseous catalyst (process with cold Core box, cold box process).
  • connection by means of metallic Thread tie rods by means of gluing with cold or Hot gluing and the connection by forming axial connector cores most common.
  • U.S. Patent 4,932,459 relates to a method of interconnecting a core package by blowing one or more axial connector cores through axial grooves or holes provided in each of the cores to be connected. Such a method is based on the effect of a positive connection, the wedging being formed from the one or more axial connection cores.
  • the positive connection with the help of axial connecting cores has significant restrictions on defining dimensions, subdivisions and the arrangement of the or the positive cores.
  • the present invention is therefore based on the object the disadvantages of the aforementioned methods overcome and a process for connecting casting cores to create that compared to the known Procedure represents a simplification and a larger one Design freedom with regard to the core design consists.
  • the invention sees in an advantageous Show the individual cores together to weld, using a mixture as welding material of sand and binders as in the "process with cold core box "is used.
  • the invention therefore enables the perfect connection of two or more casting cores previously formed and assembled by injection the mixture into suitable channels that were previously on one or both contact surfaces between one and the other core have been provided (This means channels, their course or axis in the Connection level between the cores). The curing the mixture caused by the gas supply then welding the cores together.
  • the core shooter blows with the help of the firing plate the sweat mixture into the channels, the sweat mixture binds intimately to the surrounding core material, namely in the sense of welding and not in Meaning of a bond.
  • the firing plate causes the injection at the injection points of the respective Channels takes place, namely on the outside Outlet openings of the channels.
  • Fig. 1 shows how the individual cores 11 within one not shown are composed, which guarantees mutual correct positioning. Such positioning can be done with the help of Centering and reference devices are achieved, on the contact surfaces 12 between the cores are provided. Alternatively, especially around ultimately the precision of the dimension of the package 14 in the event that the packets are formed from several cores are, the individual cores 11 assembled in facilities that are even without contact among the Core the axis distance between one and the other Determine core 11. This way, smaller ones Tolerances in the dimension of the individual cores balanced be even adding gaps between the cores can be approved.
  • the dimensions and position of the wedge or the wedges are significantly limited by requirements due to the constructive and functional Properties of the cores to be connected (e.g. existence of adhesive channels), ultimately allows the described Process the connection surfaces between to choose the cores with great freedom of design. In this way it is possible to weld the surface by means of a suitable design of the channels to maximize their shape and dimension in simpler Way depending on the specific form of the to be connected Cores can be optimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Induction Machinery (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP98109522A 1997-05-27 1998-05-26 Verfahren zum Verbinden von mehreren Giesskernen Expired - Lifetime EP0881013B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI001238A IT1292008B1 (it) 1997-05-27 1997-05-27 Metodo di unione di anime di fonderia
ITMI971238 1997-05-27

Publications (2)

Publication Number Publication Date
EP0881013A1 EP0881013A1 (de) 1998-12-02
EP0881013B1 true EP0881013B1 (de) 2001-05-30

Family

ID=11377225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109522A Expired - Lifetime EP0881013B1 (de) 1997-05-27 1998-05-26 Verfahren zum Verbinden von mehreren Giesskernen

Country Status (4)

Country Link
EP (1) EP0881013B1 (enrdf_load_stackoverflow)
DE (1) DE59800778D1 (enrdf_load_stackoverflow)
ES (1) ES2159414T3 (enrdf_load_stackoverflow)
IT (1) IT1292008B1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI980160A1 (it) * 1998-09-03 2000-03-03 Foundry Automation Sas Metodo per la realizzazione di anime composite per getti di fonderia ed anime composite ottenute con tale metodo.
US6435259B1 (en) * 2000-12-22 2002-08-20 International Engine Intellectual Property Company, L.L.C. Core assembly method for cylinder head castings

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2005911A6 (es) * 1987-10-22 1989-04-01 Erana Agustin Arana Mejoras introducidas en la conformacion de paquetes de machos para fundicion.
TW380062B (en) * 1996-02-23 2000-01-21 Sintokogio Ltd Cores to be connected in an assembly and method for connecting a plurality of cores in an assembly

Also Published As

Publication number Publication date
ITMI971238A1 (it) 1998-11-27
DE59800778D1 (de) 2001-07-05
ES2159414T3 (es) 2001-10-01
EP0881013A1 (de) 1998-12-02
ITMI971238A0 (enrdf_load_stackoverflow) 1997-05-27
IT1292008B1 (it) 1999-01-25

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