EP0881013B1 - Verfahren zum Verbinden von mehreren Giesskernen - Google Patents
Verfahren zum Verbinden von mehreren Giesskernen Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 24
- 239000011162 core material Substances 0.000 claims description 59
- 239000000203 mixture Substances 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 210000004243 sweat Anatomy 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000012778 molding 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
- 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)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Induction Machinery (AREA)
Description
- Vorsehen von geeigneten Kanälen auf mindestens einer oder beiden der sich gegenüberliegenden Oberflächen der Kerne während der Kernbildung,
- Zusammenfügen der einzelnen Kerne in Einrichtungen, die die korrekte gegenseitige Ausrichtung gewährleisten,
- Blockade des auf diese Weise erhaltenen Paketes mittels einer Einrichtung, die geeignet ist, eine adäquate Gegenkraft zu den während der Schußphasen und während der Gaszufuhr zu der Schweißmischung erzeugten Kräfte zu sichern, und
- Injektion der Schweißmischung in das Innere der vorgeformten Kanäle mittels Verwendung einer Kernschießmaschine, die geeigneterweise mit einer Schußplatte und einer Haube zur Gaszufuhr ausgestattet ist, um das Erreichen der Injektionspunkte zu garantieren.
- Fig. 1
- eine perspektivische Ansicht eines durch das erfindungsgemäße Verfahren erhaltenen Kernpaketes, und
- Fig. 2
- zwei Kerne des Kernpaketes aus Fig. 1 in einer Explosionsdarstellung, um die anliegenden Oberflächen darzustellen.
Claims (1)
- Verfahren zum Verbinden von Gießkernen (11) in einem Paket (14) von zwei oder mehreren zuvor geformten Kernen (11)durch Zusammenstellen der einzelnen Kerne (11) in Einrichtungen, die die korrekte gegenseitige Positionierung gewährleisten,durch Blockieren des auf diese Weise erhaltenen Paketes (14), um eine adäquate Gegenkraft zu den während des Verbindens der Kerne (11) erzeugten Kräfte zu sichern, unddurch Injizieren einer Mischung aus Sand und Bindemittel in die Kanäle (13) der Kerne (11)das Vorsehen von Kanälen (13) auf mindestens einer der sich gegenüberliegenden Kontaktoberflächen (12) der Kerne (11) während der Kernbildung,das Einblasen einer als Schweißmischung dienenden Mischung aus Sand und einem mit einem gasförmigen Katalysator aushärtenden Bindemittels mit Hilfe einer Schußplatte einer Kernschießmaschine, wobei die Schußplatte die Injektion an Injektionspunkten der jeweiligen Kanäle (13) bewirkt, und wobei die Schweißmischung sich innig mit dem umliegenden Kernmaterial in den Kanälen (13) verbindet, unddas Zuführen eines gasförmigen Katalysators mit Hilfe einer.Haube für die Gaszufuhr zum Aushärten der Schweißmischung in den Kanälen (13) und zum Verschweißen der Kerne (11) untereinander.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI971238 | 1997-05-27 | ||
IT97MI001238A IT1292008B1 (it) | 1997-05-27 | 1997-05-27 | Metodo di unione di anime di fonderia |
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 (de) |
DE (1) | DE59800778D1 (de) |
ES (1) | ES2159414T3 (de) |
IT (1) | IT1292008B1 (de) |
Families Citing this family (2)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5839498A (en) * | 1996-02-23 | 1998-11-24 | Sintokogio, Ltd. | Method for connecting cores by charging connecting sand into them |
ES2005911A6 (es) * | 1987-10-22 | 1989-04-01 | Erana Agustin Arana | Mejoras introducidas en la conformacion de paquetes de machos para fundicion. |
-
1997
- 1997-05-27 IT IT97MI001238A patent/IT1292008B1/it active IP Right Grant
-
1998
- 1998-05-26 DE DE59800778T patent/DE59800778D1/de not_active Expired - Fee Related
- 1998-05-26 EP EP98109522A patent/EP0881013B1/de not_active Expired - Lifetime
- 1998-05-26 ES ES98109522T patent/ES2159414T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ITMI971238A1 (it) | 1998-11-27 |
ITMI971238A0 (de) | 1997-05-27 |
DE59800778D1 (de) | 2001-07-05 |
IT1292008B1 (it) | 1999-01-25 |
ES2159414T3 (es) | 2001-10-01 |
EP0881013A1 (de) | 1998-12-02 |
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