EP3606691A1 - Kernpaket - Google Patents
KernpaketInfo
- Publication number
- EP3606691A1 EP3606691A1 EP18714736.8A EP18714736A EP3606691A1 EP 3606691 A1 EP3606691 A1 EP 3606691A1 EP 18714736 A EP18714736 A EP 18714736A EP 3606691 A1 EP3606691 A1 EP 3606691A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- cores
- core package
- package according
- holding
- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
-
- 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
- B22C9/108—Installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
Definitions
- the present invention relates to a core package, a casting mold and a method for producing a casting.
- the castings in question are, for example, cylinder heads of internal combustion engines.
- Such components are produced for example by gravity casting and require elaborately designed core packages to the later cooling chambers or cooling lines in the casting, be it for water or oil, etc., to image.
- this fixing can be done for example via the Kokillenschieber to appropriately trained core camps of the cores.
- Such openings are closed, for example, in the finished casting with screws or lids.
- this is preceded by a complex processing, including, for example, milling, tapping, etc.
- a core packet comprises at least two cores, wherein the cores have mutually oriented holding sections, which form an arranging section, and wherein at least one holding element is arranged or arrangeable on and / or on the arranging section, whereby the cores can be fixed to one another.
- Mutually oriented means that the holding sections abut one another or are in contact, at least in regions, whereby at least two holding sections preferably always form an arranging section
- the advantage resides in the fact that a coherent core package can be formed / formed, whereby the total weight resulting from this can prevent the core package from floating in the casting mold, and additionally or alternatively, this also creates the possibility that, for example, only one of the cores of the Conveniently, therefore, fewer hold-downs are sufficient in order to counteract the buoyancy, for example, and may even be entirely based on the use of separate hold-downs or a separate core layer be waived.
- a holding force of the holding element acts on the arrangement portion, in particular as a compressive force.
- the pressure force acts in particular radially, depending on the configuration of the holding element, in particular if the holding element comprises the arrangement section fully, fully radially.
- the cores are sand cores produced, for example, in a hot-box or cold-box process.
- the holding element is designed for positive and / or non-positive arrangement.
- an inner contour of the holding element corresponds completely or substantially to an outer contour of the Arrangement section, resulting in a positive connection.
- a frictional connection may be provided, whereby an active compression or fixing of the cores to each other via the holding element can take place.
- the cores are biased to each other quasi.
- the retaining element is elastic.
- the elasticity can be provided by the shape or design of the retaining element but also by an appropriate choice of material.
- An elastically formed holding element can be used with advantage on different sized arrangement sections. Due to the elasticity but also, as previously described, the holding force can be built.
- a dimension of the holding element is adjustable. This is made possible, for example, as already indicated, via the elasticity or a deformability or via a corresponding geometric design.
- the holding element is annular.
- the holding element is annular. This can be a closed or open ring.
- the holding element is a spring ring.
- the spring ring is in particular a ring, which is not closed, whereby a deformability or elasticity or mobility is achieved. This allows for an adaptation to differently sized arrangement areas.
- a holding element ment which can apply a bias voltage to the respective arrangement portion.
- a material / material of the holding element corresponds to a cast material or at least substantially to the cast material.
- the casting material / casting material is, for example, an aluminum material, in particular an aluminum alloy or a magnesium alloy.
- the holding element can be part of the later casting.
- the holding element may be provided according to an embodiment with a corresponding coating, wherein the composition depends on the casting material used.
- the material of the holding element is selected to specifically influence the component properties of the subsequent casting.
- An influence may be selected such that a rigidity increase is provided by the holding element, in particular by a suitable selection of material, or a targeted and regional weight reduction, etc.
- a melt or evaporation temperature of the material of the holding element is applied below a melting temperature of the casting material.
- the retaining element can thus z. B. melt or vaporize, in other words during the actual casting process "disappear" or dissolve.This process is expediently designed so that already areas or sections of the melt are at least so far frozen that holding the core or by the holding element or by the holding elements is no longer needed.
- the holding portions are formed in cross-section circular segment.
- Two such mutually orientated Supported holding sections advantageously form an oval or approximately oval or round, in particular circular, arrangement section.
- the arrangement section can also be rectangular in cross-section, for example quadrangular, such as square, rectangular or even polygonal. The avoidance of edges is particularly advantageous because it can be done by the holding elements a very gentle fixing or even compression.
- the arrangement portion is formed as an extension.
- it is an extension which extends perpendicularly or substantially perpendicularly away from the actual outer contour of the respective core.
- the core package comprises a plurality of arrangement sections, for example 2, 3, 4, 5 or more.
- the number and position depends on the geometry and the dimensions of the respective component.
- a length-diameter ratio of the extension is less than 1, in particular less than 0.6.
- a length of the extension is, for example, 3-10 mm, preferably about 5-8 mm, while a diameter is about 10-40 mm, in particular about 15-30 mm. The dimensions mentioned allow a secure fixation of the cores to each other by the holding element, in particular by virtue of the resulting circumferential surface of the arrangement section.
- the core package is a core package, a cylinder head of an internal combustion engine.
- a core package comprises, for example, a water jacket core and an oil chamber core.
- the core package can also comprise more than two cores, for example three, four, five or more cores, wherein these can be mutually fixed to one another via correspondingly arranged holding sections.
- the invention also relates to a casting mold comprising at least one core package according to the invention.
- the casting mold may be a lost shape, such as a sand mold, or a permanent mold, such as a mold.
- a lost shape such as a sand mold
- a permanent mold such as a mold.
- it is a casting mold for low-pressure or gravity casting or for pure sand casting or die casting.
- a hold-down is arranged or provided only on one of the cores.
- At least one of the cores is a lower core with respect to the direction of gravity, and wherein at least one of the cores is an upper core with respect to the direction of gravity, and at least one hold-down is provided only at the lower core.
- the core package allows only one of the cores, in particular for example the lower core, to be fixed relative to the casting mold as such.
- the core package as such is expediently fixed in itself or to one another such that no further holding of, for example, the top is necessary.
- the invention is also directed to a method for producing a cast part, in particular a cylinder head of an internal combustion engine, comprising the steps:
- the casting mold With the core package, the casting mold, as well as with the process, the production costs can be significantly reduced overall, while at the same time increasing the production speed.
- the Rohteil- or finished part processing of the core storage openings can be largely eliminated, the same applies to the assembly of any closure elements, such as covers, screws, expander, etc.
- the above-mentioned tightness problems in the subsequent closing of the core bearing openings account for advantage in principle completely.
- Fig. 1 a schematic view of a core package; 2 shows two detailed views of arrangement sections;
- 3 shows two embodiments of holding elements.
- Fig. 1 shows, in perspective, a schematic view of a core package, comprising a core 1 and a core 2, wherein both cores 1 and 2 respectively two holding portions 1 1 and 12 form. These are oriented and positioned relative to one another such that arrangement sections 20 are formed. These serve to arrange a holding element not shown in FIG. 1.
- Fig. 2 shows in the left half of a front view of an arrangement portion 20, which is formed from two holding portions 1 1, 12.
- An annular, in particular annular, retaining element 40 is arranged around the arrangement section 20.
- the holding member 40 surrounds the arrangement portion 20 and thus the two cores 1 and 2 fixed against each other or compressed.
- a prestressing can already be applied to the two retaining sections 11 and 12 or the adjoining cores 1 and 2 in this state.
- the holding member 40 may also be formed such that it is merely pushed flush on the arrangement portion 40, wherein in this case no force on the two holding portions 1 1 and 12 acts.
- Fig. 3 shows two possible embodiments of retaining elements 40, which are in particular designed as spring elements or as spring rings.
- These holding elements 40 are for example made of metal and, depending on the application, for example, with respect to the material adapted to the melt of the casting material of the later component.
- the casting material is, for example, an aluminum material, in particular an aluminum alloy.
- the material of the holding element 40 can be a Be different material or even the same material as that of the cast component itself. Both holding elements 40 allow about their shape and geometry in particular radial elasticity or deformability, which allows both the arrangement of differently sized arrangement areas as well as the application of a fixation / holding the cores suitable preload force.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017205853.6A DE102017205853A1 (de) | 2017-04-06 | 2017-04-06 | Kernpaket |
| PCT/EP2018/056940 WO2018184827A1 (de) | 2017-04-06 | 2018-03-20 | Kernpaket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3606691A1 true EP3606691A1 (de) | 2020-02-12 |
Family
ID=61837741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18714736.8A Pending EP3606691A1 (de) | 2017-04-06 | 2018-03-20 | Kernpaket |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11077489B2 (de) |
| EP (1) | EP3606691A1 (de) |
| CN (1) | CN110337336B (de) |
| DE (1) | DE102017205853A1 (de) |
| WO (1) | WO2018184827A1 (de) |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE394018C (de) * | 1922-09-27 | 1924-04-12 | Rudolf Rautenbach Fa | Mehrteiliger Metallkern zum Giessen von Kolben aus Aluminium |
| US4487246A (en) * | 1982-04-12 | 1984-12-11 | Howmet Turbine Components Corporation | System for locating cores in casting molds |
| JPS62263846A (ja) * | 1986-05-08 | 1987-11-16 | Toyota Motor Corp | 中子接合方法 |
| DE9315991U1 (de) * | 1993-10-20 | 1994-02-10 | GST Giesserei-Systemtechnik GmbH, 41747 Viersen | Bei der Herstellung von Gußteilen mit Hohlräumen verwendbares Kernpaket |
| DE19742276A1 (de) * | 1997-09-25 | 1999-04-01 | Hottinger Maschb Gmbh | Verbindung von Kernen |
| DE10000149A1 (de) * | 2000-01-06 | 2001-07-12 | Deutz Ag | Kernpaket |
| JP4329774B2 (ja) * | 2006-03-15 | 2009-09-09 | トヨタ自動車株式会社 | シリンダヘッドの製造方法およびシリンダヘッド |
| US8118079B2 (en) | 2007-08-17 | 2012-02-21 | GM Global Technology Operations LLC | Casting noise-damped, vented brake rotors with embedded inserts |
| CN101745603B (zh) * | 2009-12-28 | 2011-11-02 | 山东蒙凌工程机械股份有限公司 | 呋喃树脂砂铸造铸钢汽车桥壳制芯工艺 |
| DE102010026597A1 (de) | 2010-07-08 | 2012-01-12 | Mahle International Gmbh | Verfahren zur Herstellung eines Zylinders für einen Zweitaktmotor sowie Gusskern hierfür |
| DE102013216294A1 (de) * | 2013-08-16 | 2015-02-19 | Volkswagen Aktiengesellschaft | Zylinderkopf einer Brennkraftmaschine und Verfahren zur Herstellung eines Zylinderkopfes einer Brennkraftmaschine |
| DE102014203699A1 (de) | 2014-02-28 | 2015-09-03 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren für die herstellung eines gusskerns für die fertigung von zylinderköpfen |
| CN104439089B (zh) * | 2014-11-13 | 2017-03-15 | 四川南车共享铸造有限公司 | 一种砂芯紧固结构、制备方法及其应用 |
| CN104759594B (zh) * | 2015-04-17 | 2017-02-01 | 浙江机电职业技术学院 | 一种高锰钢破碎壁铸件快速顺序凝固装置 |
| CN105382201B (zh) * | 2015-10-30 | 2017-08-29 | 襄阳云威机械有限公司 | 一种制动盘铸造工艺及其制动盘铸件模具 |
| CN105642838B (zh) * | 2016-04-06 | 2018-04-03 | 台州市椒江永固船舶螺旋桨厂 | 毂帽鳍加工工艺 |
| CN205816726U (zh) * | 2016-06-29 | 2016-12-21 | 长兴金诺机械有限公司 | 一种组合式型芯 |
| US10766065B2 (en) * | 2016-08-18 | 2020-09-08 | General Electric Company | Method and assembly for a multiple component core assembly |
| DE102017106775A1 (de) * | 2017-03-29 | 2018-10-04 | Nemak, S.A.B. De C.V. | Gießkern und Verfahren zu seiner Herstellung |
-
2017
- 2017-04-06 DE DE102017205853.6A patent/DE102017205853A1/de active Pending
-
2018
- 2018-03-20 CN CN201880014128.XA patent/CN110337336B/zh active Active
- 2018-03-20 EP EP18714736.8A patent/EP3606691A1/de active Pending
- 2018-03-20 WO PCT/EP2018/056940 patent/WO2018184827A1/de not_active Ceased
-
2019
- 2019-08-09 US US16/536,393 patent/US11077489B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US11077489B2 (en) | 2021-08-03 |
| WO2018184827A1 (de) | 2018-10-11 |
| DE102017205853A1 (de) | 2018-10-11 |
| CN110337336A (zh) | 2019-10-15 |
| CN110337336B (zh) | 2022-02-11 |
| US20190358698A1 (en) | 2019-11-28 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20191011 |
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| AK | Designated contracting states |
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| DAV | Request for validation of the european patent (deleted) | ||
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| 17Q | First examination report despatched |
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| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230502 |