EP2734322A1 - GIEßKERN EINER GUSSFORM ZUR HERSTELLUNG EINES ZYLINDERS - Google Patents
GIEßKERN EINER GUSSFORM ZUR HERSTELLUNG EINES ZYLINDERSInfo
- Publication number
- EP2734322A1 EP2734322A1 EP12731009.2A EP12731009A EP2734322A1 EP 2734322 A1 EP2734322 A1 EP 2734322A1 EP 12731009 A EP12731009 A EP 12731009A EP 2734322 A1 EP2734322 A1 EP 2734322A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- casting
- cylinder
- sand
- steel
- 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
Links
- 238000005266 casting Methods 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 12
- 230000015572 biosynthetic process Effects 0.000 abstract description 9
- 239000011800 void material Substances 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- -1 for example Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
-
- 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 present invention relates to a casting core for a casting mold for
- the invention also relates to a method for producing a cast cylinder.
- a core is provided from a provided with holes compact metal cooling box, which is provided on all sides with a sand panel.
- Internal combustion engine in particular for producing an aluminum cylinder of a two-stroke engine, not in the form of one piece of sand as before, but according to the invention of two parts, namely a sand core and an associated steel core.
- a sand core preferably only the upper part of the casting core, that is to say that region which is later assigned to a combustion chamber of the cylinder, is made of sand, whereas a lower region, that is to say the region which is assigned to a later cylinder running surface, is formed from steel.
- the steel core takes in comparison to the sand core significantly more heat and performs this comparatively, making it especially in the cylinder surface to a significantly increased temperature difference between the cylinder surface (surface) and further inside and thereby voids can be avoided or at least reduced , Since such voids are extremely critical, especially in the area of the later cylinder running surfaces, the steel core is used in this area in particular in order to achieve as rapid / uniform cooling of the cast cylinder as possible, together with the outermost mold, also made of metal. Due to the steel core formed in the area of the cylinder surface now as rapid cooling inward as outward to Steel mold, whereby the possibly forming voids are forced into the interior of the cylinder wall and indeed so deep that they are no longer open at a later processing.
- the casting core is furthermore formed by a sand core, as a result of which, in particular, difficult casting geometries, in particular also undercuts, can be produced.
- the main advantage of the casting core according to the invention is that the voids formation is at least greatly reduced or preferably completely avoided and even when voids occur they are arranged so deep in the cylinder wall that they are at a later
- Machining step eg. When turning or honing, not be opened and thereby not adversely affect the cylinder running properties.
- the steel core engages via a mandrel in a corresponding recess on the sand core, or vice versa.
- the steel core can have a corresponding mandrel and the sand core can have a corresponding recess, so that the steel core can simply be inserted into the recess of the sand core via the mandrel and then connected to the sand core can.
- Steel core outgoing mandrel also has the great advantage that it can act in the manner of a heat conduction rib and thereby further improve the temperature management in the casting core.
- the sand core is preferably positively connected to the steel core, whereby the handling of the casting core formed from the sand core and the steel core is significantly simplified.
- the sand core and / or the steel core are each solid. Due to the massive formation of the sand core and / or the steel core, these are relatively robust and thus ideally suited for use in modern foundries. At the same time allows a massive training, especially the steel core, and a significantly improved heat absorption and thus a significantly improved heat dissipation, whereby a uniform solidification or cooling of the cylinder can be achieved.
- Fig. 1 shows a casting core according to the invention in a view
- Fig. 2 is a sectional view through the casting core according to the invention along the cutting plane A-A.
- a casting core 1 also has a casting mold, which is otherwise not shown, for the production of a likewise shown cylinder of an internal combustion engine, in particular for producing a cylinder of a two-stroke engine, a sand core 2 and a steel core 3 connected thereto. Consequently, the casting core 1 is in two parts
- the sand core 2 at least partially covers a portion of a subsequent combustion chamber of the cylinder, whereas the steel core 3 at least partially covers an area of a later cylinder surface.
- Inventive sand core 1 remedy by being formed in the area of a later cylinder surface of the steel core 3, thereby enabling a relatively high heat dissipation.
- the high heat dissipation in particular in the region of the later cylinder running surface causes a small temperature difference of the cooling cylinder between the inner steel core 3 and the outer, not shown mold.
- the mold forms an outer shape of the mold, whereas the casting core 1, the inner shape of the
- the sand core 2 has a mandrel 4, which engages in a corresponding recess 5 on the steel core 3. Understandably, the formation of such a mandrel 4 on the steel core 3 and the corresponding formation of the recess 5 on the sand core 2 is conceivable. About the mandrel 4 and the associated recess 5, a positive connection between the sand core 2 and the steel core 3 can be achieved. As can be seen further in FIG. 2, the sand core 2 and / or the steel core 3 are / is massively formed, whereby in particular in the region of the region of the
- Steel core 3 high and rapid heat dissipation can be done. Steel has a significantly improved thermal conductivity compared to sand.
- 3 openings 6 may be provided in the steel core, via which, for example, a vent or cooling can take place.
- the casting core 1 according to the invention is used for the production of cast cylinders and in this process is surrounded by a mold, not shown.
- the casting core constitutes the casting mold together with the mold.
- the material used for casting the cylinder may, for example, be cast steel but also light metal, such as, for example, aluminum.
- the casting core 1 With the casting core 1 according to the invention, a uniform cooling of the cast cylinder from the inside and outside and, associated therewith, a significantly reduced voids formation in the region of the critical regions can be achieved, as a result of which the quality of the cylinders produced in this way can be significantly increased. If, contrary to expectation, voids or inclusions still form, they are usually arranged so deeply in the cylinder that they can be used laterstagesschntt, eg. When grinding, turning or honing, not disclosed and thus are harmless.
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 |
|---|---|---|---|
| DE102011079356A DE102011079356A1 (de) | 2011-07-18 | 2011-07-18 | Gießkern einer Gussform zur Herstellung eines Zylinders |
| PCT/EP2012/063048 WO2013010798A1 (de) | 2011-07-18 | 2012-07-04 | GIEßKERN EINER GUSSFORM ZUR HERSTELLUNG EINES ZYLINDERS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2734322A1 true EP2734322A1 (de) | 2014-05-28 |
| EP2734322B1 EP2734322B1 (de) | 2017-09-06 |
Family
ID=46420236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12731009.2A Not-in-force EP2734322B1 (de) | 2011-07-18 | 2012-07-04 | GIEßKERN EINER GUSSFORM ZUR HERSTELLUNG EINES ZYLINDERS |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2734322B1 (de) |
| CN (1) | CN103648681B (de) |
| BR (1) | BR112014001061A2 (de) |
| DE (1) | DE102011079356A1 (de) |
| WO (1) | WO2013010798A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015225588A1 (de) | 2015-12-17 | 2017-06-22 | Volkswagen Aktiengesellschaft | Gießverfahren und Kühleinsatz zur Herstellung eines Gussteiles |
| US11654476B2 (en) | 2020-09-28 | 2023-05-23 | GM Global Technology Operations LLC | Hybrid core for manufacturing of castings |
| CN114406201B (zh) * | 2022-01-26 | 2023-11-14 | 阜新力达钢铁铸造有限公司 | 导轨无孔立柱的铸造方法及系统 |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE719454C (de) * | 1940-06-30 | 1942-04-09 | Metallgussgesellschaft M B H | Verfahren und Vorrichtung zum Festhalten der Kuehleisen in Kern- oder Formkaesten |
| CH300083A (de) * | 1942-11-20 | 1954-07-15 | Daimler Benz Ag | Giessform mit Kernen zur Herstellung von Kurbelgehäusen von Brennkraftmaschinen. |
| GB1465486A (en) * | 1973-04-18 | 1977-02-23 | Aeroplane Motor Alu Cast | Method and apparatus for forming a curved passage in a casting and a casting so formed |
| US4003422A (en) * | 1975-04-21 | 1977-01-18 | Schramm Buford J | Process for making a composite cylinder head assembly |
| US4252175A (en) * | 1979-05-25 | 1981-02-24 | Outboard Marine Corporation | Cylinder block having a cast-in core unit and process for manufacturing same |
| CH640160A5 (de) * | 1979-07-05 | 1983-12-30 | Fischer Ag Georg | Kokille mit kernzug. |
| JPS6040663A (ja) * | 1983-08-11 | 1985-03-04 | Kawasaki Heavy Ind Ltd | シリンダブロツクの製造方法 |
| YU43348B (en) | 1984-03-13 | 1989-06-30 | Tam | Combined kernel for casting cylinders of grey cast iron for air cooled internal combustion motors |
| JPH03283Y2 (de) * | 1986-07-24 | 1991-01-08 | ||
| US4986942A (en) * | 1988-03-22 | 1991-01-22 | Outboard Marine Corporation | Method for forming ported cylinder sleeve liner foam pattern |
| JP2797187B2 (ja) * | 1988-06-06 | 1998-09-17 | 本田技研工業株式会社 | 2サイクルエンジン用シリンダブロックの鋳造方法 |
| DE59707494D1 (de) * | 1997-04-15 | 2002-07-18 | Waertsilae Schweiz Ag Winterth | Giessform und Verfahren zum Herstellen von metallischen Hohlgiesslingen sowie Hohlgiesslinge |
| JP2000126847A (ja) * | 1998-10-22 | 2000-05-09 | Daido Steel Co Ltd | 中空鋼塊の鋳造方法及びこの方法に使用する中子 |
| US6478073B1 (en) * | 2001-04-12 | 2002-11-12 | Brunswick Corporation | Composite core for casting metallic objects |
| US6527040B2 (en) * | 2001-06-11 | 2003-03-04 | General Motors Corporation | Casting of engine blocks |
| FR2841163B1 (fr) * | 2002-06-21 | 2005-01-28 | Montupet Sa | Procede de moulage de pieces de fonderie, notamment de blocs-moteurs, en alliage leger |
| JP3910955B2 (ja) * | 2003-12-22 | 2007-04-25 | 株式会社共立 | インサート中子及びそれを用いた内燃エンジン用シリンダの製造方法 |
| DE102005051561B3 (de) * | 2005-10-26 | 2007-01-11 | Honsel Gmbh & Co Kg | Verfahren und Anlage zum Gießen von Leichtmetall-Zylinderkurbelgehäusen in Sandformen |
| US7438117B2 (en) * | 2006-01-19 | 2008-10-21 | Gm Global Technology Operations, Inc. | Cylinder block casting bulkhead window formation |
| DE102006006132A1 (de) * | 2006-02-10 | 2007-08-16 | Hydro Aluminium Alucast Gmbh | Verfahren und Vorrichtung zum Montieren einer Gießform zum Gießen eines Gussteils aus einer Metallschmelze |
| DE102006053404A1 (de) * | 2006-11-10 | 2008-05-15 | Hydro Aluminium Alucast Gmbh | Gießform zum Gießen eines Gussteils und Verwendung einer solchen Gießform |
| DE102006058123A1 (de) * | 2006-12-09 | 2008-06-19 | Mahle International Gmbh | Formkörper zur Herstellung eines Hohlraumes |
| JP2008183581A (ja) * | 2007-01-29 | 2008-08-14 | Toyota Motor Corp | シリンダブロックの製造方法 |
| DE102010026597A1 (de) * | 2010-07-08 | 2012-01-12 | Mahle International Gmbh | Verfahren zur Herstellung eines Zylinders für einen Zweitaktmotor sowie Gusskern hierfür |
| CN102059321A (zh) * | 2010-12-10 | 2011-05-18 | 西安航空动力控制科技有限公司 | 一种型芯及其制备方法以及利用型芯制备铸件内腔的方法 |
-
2011
- 2011-07-18 DE DE102011079356A patent/DE102011079356A1/de not_active Withdrawn
-
2012
- 2012-07-04 WO PCT/EP2012/063048 patent/WO2013010798A1/de not_active Ceased
- 2012-07-04 BR BR112014001061A patent/BR112014001061A2/pt not_active Application Discontinuation
- 2012-07-04 EP EP12731009.2A patent/EP2734322B1/de not_active Not-in-force
- 2012-07-04 CN CN201280032924.9A patent/CN103648681B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013010798A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103648681B (zh) | 2016-07-13 |
| DE102011079356A1 (de) | 2013-01-24 |
| CN103648681A (zh) | 2014-03-19 |
| WO2013010798A1 (de) | 2013-01-24 |
| EP2734322B1 (de) | 2017-09-06 |
| BR112014001061A2 (pt) | 2017-02-21 |
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