EP0881013A1 - Procédé de connection des noyaux aux sable - Google Patents

Procédé de connection des noyaux aux sable Download PDF

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Publication number
EP0881013A1
EP0881013A1 EP98109522A EP98109522A EP0881013A1 EP 0881013 A1 EP0881013 A1 EP 0881013A1 EP 98109522 A EP98109522 A EP 98109522A EP 98109522 A EP98109522 A EP 98109522A EP 0881013 A1 EP0881013 A1 EP 0881013A1
Authority
EP
European Patent Office
Prior art keywords
cores
channels
mixture
core
injection
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.)
Granted
Application number
EP98109522A
Other languages
German (de)
English (en)
Other versions
EP0881013B1 (fr
Inventor
Erfindernennung liegt noch nicht vor Die
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
Fitz 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 Fitz Hansberg SpA filed Critical Fitz Hansberg SpA
Publication of EP0881013A1 publication Critical patent/EP0881013A1/fr
Application granted granted Critical
Publication of EP0881013B1 publication Critical patent/EP0881013B1/fr
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, produced. 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, gold 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 a process by which a core package with the help of blowing one or more axial connection cores through axial grooves or axial holes with each other be connected in each of the connected Cores are provided. Such a process is based on the effect of a positive connection, the Wedging from the one or more axial connecting cores is formed.
  • connection via anchors or gluing have disadvantages, which are related to technologies for which specific experiences are often missing in a foundry.
  • 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 Procédé de connection des noyaux aux sable Expired - Lifetime EP0881013B1 (fr)

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 true EP0881013A1 (fr) 1998-12-02
EP0881013B1 EP0881013B1 (fr) 2001-05-30

Family

ID=11377225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109522A Expired - Lifetime EP0881013B1 (fr) 1997-05-27 1998-05-26 Procédé de connection des noyaux aux sable

Country Status (4)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000013819A1 (fr) * 1998-09-03 2000-03-16 Foundry Automation S.A.S. Noyaux composites pour produits moules de fonderie
WO2002051567A2 (fr) * 2000-12-22 2002-07-04 International Engine Intellectual Property Company, Llc. Procede d'assemblage de noyaux pour moulage de culasse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932459A (en) * 1987-10-22 1990-06-12 Erana Augustin A Formation of foundry core blocks
EP0796682A1 (fr) * 1996-02-23 1997-09-24 Sintokogio, Ltd. Procédé de connection des noyaux aux sable et noyau

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932459A (en) * 1987-10-22 1990-06-12 Erana Augustin A Formation of foundry core blocks
US4932459B1 (en) * 1987-10-22 1996-05-14 Augustin A Erana Formation of foundry core blocks
EP0796682A1 (fr) * 1996-02-23 1997-09-24 Sintokogio, Ltd. Procédé de connection des noyaux aux sable et noyau

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000013819A1 (fr) * 1998-09-03 2000-03-16 Foundry Automation S.A.S. Noyaux composites pour produits moules de fonderie
WO2002051567A2 (fr) * 2000-12-22 2002-07-04 International Engine Intellectual Property Company, Llc. Procede d'assemblage de noyaux pour moulage de culasse
WO2002051567A3 (fr) * 2000-12-22 2003-08-21 Int Engine Intellectual Prop Procede d'assemblage de noyaux pour moulage de culasse

Also Published As

Publication number Publication date
ITMI971238A1 (it) 1998-11-27
EP0881013B1 (fr) 2001-05-30
DE59800778D1 (de) 2001-07-05
ES2159414T3 (es) 2001-10-01
ITMI971238A0 (fr) 1997-05-27
IT1292008B1 (it) 1999-01-25

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