EP1328361A1 - Formkörper zur herstellung von hohlräumen beim metallgiessen - Google Patents
Formkörper zur herstellung von hohlräumen beim metallgiessenInfo
- Publication number
- EP1328361A1 EP1328361A1 EP01986627A EP01986627A EP1328361A1 EP 1328361 A1 EP1328361 A1 EP 1328361A1 EP 01986627 A EP01986627 A EP 01986627A EP 01986627 A EP01986627 A EP 01986627A EP 1328361 A1 EP1328361 A1 EP 1328361A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavities
- production
- shaped body
- calcium silicate
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
-
- 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
Definitions
- the invention relates to a molded body for producing cavities according to the features of the preamble of claim 1.
- moldings which are designed as sand cores or salt cores for producing cavities in a body when casting liquid metal. After casting the body, this core is rinsed out, so that the cavity can arise.
- Such a sand or salt core is complex to manufacture and takes a certain time after its shaping for solidification. Thereafter, these cores are very rigid, so that there is a risk that they may break when inserted into a mold.
- the invention is therefore based on the object of providing a shaped body for producing cavities which avoids the disadvantages described.
- a particularly advantageous application of such a shaped body is to be specified.
- the molded body consists of calcium silicate fibers which are held together in solid form by a soluble binder.
- the shaped bodies can be brought into their solid form by mixing these fibers with the soluble binder and then pressing them, so that it is therefore quick and easy to produce.
- the use of calcium silicate fibers has the advantage that these are sufficiently heat-resistant and can withstand the temperature of the casting melt. Another and significant advantage is that the cohesion of the molded body is ensured much better than with salt or sand core due to the use of fibers, so that the molded bodies according to the invention are much more resistant to handling, ie when inserted into the casting mold.
- the binder is an inorganic binder. This has the advantage that this inorganic binder combines very well with the calcium silicate fibers and contributes to the strength of the molded body formed therefrom.
- aluminum oxide is added to the calcium silicate fibers. This also further improves the cohesion of the finished molded article and achieves an overall smoother surface.
- a new and advantageous application of the shaped body is created by its use in the production of cavities in components of internal combustion engines.
- a complex shaping of cavities is often required, which can only be achieved with great effort using the salt or sand cores known to date.
- the shaped bodies made of calcium silicate fibers according to the invention can be brought into the desired shape for producing the cavity much more easily. Even with a larger extension of a cavity (e.g. cavities in an engine block of an internal combustion engine, through which cooling water later flows), it can be flushed out much more quickly and easily, so that production is simplified.
- a particularly preferred application of the shaped body according to the invention can be seen in the production of cavities in pistons of internal combustion engines.
- cavities are required, in particular in the piston crown area, which are either designed as cooling channels in order to cool the piston crown area or which are present to reduce the weight of the piston.
- Pistons for internal combustion engines are generally manufactured using a two-part or multi-part casting mold. The lower part of the piston, which faces away from the piston crown area and in which, for example, the hub bores are located, is formed by a correspondingly shaped casting core. If the finished piston should have a cooling channel or a cavity for weight reduction, the salt or sand core is placed on the casting core via so-called quills.
- the shaped body made of calcium silicate fibers is much more suitable, since it also has the required stiffness, but does not break directly if it has not been brought into a precise position on the casting core or falls, for example, to the floor during insertion.
- the piston it is much easier to rinse out the shaped body in order to create the cavity.
- the molded body can also be designed in such a way that the cavity not only includes, for example, the cooling channel alone, but also inlets and outlets.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10050190 | 2000-10-09 | ||
DE10050190A DE10050190A1 (de) | 2000-10-09 | 2000-10-09 | Formkörper zur Herstellung von Hohlräumen |
PCT/EP2001/011508 WO2002030593A1 (de) | 2000-10-09 | 2001-10-05 | Formkörper zur herstellung von hohlräumen beim metallgiessen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1328361A1 true EP1328361A1 (de) | 2003-07-23 |
Family
ID=7659299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01986627A Withdrawn EP1328361A1 (de) | 2000-10-09 | 2001-10-05 | Formkörper zur herstellung von hohlräumen beim metallgiessen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040016531A1 (de) |
EP (1) | EP1328361A1 (de) |
BR (1) | BR0113346A (de) |
DE (1) | DE10050190A1 (de) |
WO (1) | WO2002030593A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9238283B2 (en) * | 2008-07-24 | 2016-01-19 | Ks Kolbenschmidt Gmbh | Friction welded steel piston having optimized cooling channel |
DE102008039208A1 (de) | 2008-08-20 | 2009-02-12 | Heppes, Frank, Dipl.-Ing. | Urformkerne zur Herstellung umfangreich konturierter, hinterschnittener Hohlräume in Urformteilen, damit hergestellte Urformteile sowie Verfahren zur Herstellung, Anwendung und Entfernung der Kerne |
DE102008055848A1 (de) | 2008-11-04 | 2010-05-06 | Ks Kolbenschmidt Gmbh | Kühlkanalkolben einer Brennkraftmaschine mit einem Verschlusselement, das den Kühlkanal verschließt |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1005136A (en) * | 1963-07-25 | 1965-09-22 | Doulton & Co Ltd | Ceramic compositions |
DE2427772C3 (de) * | 1974-06-08 | 1982-03-18 | Dyckerhoff Zementwerke Ag, 6200 Wiesbaden | Verwendung von durch Zusatzstoffe modifizierten Calciumsilikatfasern glasiger Struktur zur Armierung von Baumaterialien |
US4242497A (en) * | 1980-01-10 | 1980-12-30 | Blount David H | Production of amino-silicate compounds, condensation resinous products |
DE3365469D1 (en) * | 1982-11-03 | 1986-09-25 | Secr Defence Brit | Casting of metal articles |
GB8314089D0 (en) * | 1983-05-20 | 1983-06-29 | Doulton Ind Products Ltd | Moulding |
GB8409044D0 (en) * | 1984-04-07 | 1984-05-16 | Gkn Technology Ltd | Casting metal articles |
US4690867A (en) * | 1985-04-05 | 1987-09-01 | Nichias Corporation | Material for low melting point metal casting equipment |
GB2253170B (en) * | 1991-02-28 | 1994-08-10 | Ae Piston Products | Removable cores for metal castings |
GB9308363D0 (en) * | 1993-04-22 | 1993-06-09 | Foseco Int | Refractory compositions for use in the casting of metals |
-
2000
- 2000-10-09 DE DE10050190A patent/DE10050190A1/de not_active Ceased
-
2001
- 2001-10-05 WO PCT/EP2001/011508 patent/WO2002030593A1/de active Application Filing
- 2001-10-05 BR BR0113346-2A patent/BR0113346A/pt not_active Application Discontinuation
- 2001-10-05 EP EP01986627A patent/EP1328361A1/de not_active Withdrawn
-
2003
- 2003-04-09 US US10/410,654 patent/US20040016531A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0230593A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10050190A1 (de) | 2002-04-18 |
WO2002030593A1 (de) | 2002-04-18 |
US20040016531A1 (en) | 2004-01-29 |
BR0113346A (pt) | 2003-07-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20020907 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE DE IT |
|
17Q | First examination report despatched |
Effective date: 20070207 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RTI1 | Title (correction) |
Free format text: PROCESS FOR THE PRODUCTION OF CAVITIES ON CASTING METALS |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE IT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20110503 |