WO2014033012A1 - GIEßFORM EINES KOLBENS - Google Patents
GIEßFORM EINES KOLBENS Download PDFInfo
- Publication number
- WO2014033012A1 WO2014033012A1 PCT/EP2013/067308 EP2013067308W WO2014033012A1 WO 2014033012 A1 WO2014033012 A1 WO 2014033012A1 EP 2013067308 W EP2013067308 W EP 2013067308W WO 2014033012 A1 WO2014033012 A1 WO 2014033012A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casting
- core
- piston
- sleeve
- casting core
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
- B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F2003/0007—Monolithic pistons; One piece constructions; Casting of pistons
Definitions
- the present invention relates to a mold of a piston of a
- the invention also relates to a cast piston for an internal combustion engine and to a method for producing such a cast piston.
- Each of the pillars has a centerline that leads to the
- Outer circumference of the piston may be inclined, and an end which contacts the soluble casting core and is arranged on the side of the outer circumference of the piston.
- a disadvantage of the known casting molds is in particular the support of a casting channel forming the cooling channel, provided that an inlet and a drain of the
- Cooling channels are arranged closely adjacent to each other.
- the present invention deals with the problem for a
- the present invention is based on the general idea of providing a per se known casting mold of a piston of an internal combustion engine with a soluble and substantially annular casting core to form a cooling channel and with two of these casting core during the casting supporting columns, wherein at a junction between at least one of the two supports or an additional third support and the casting core, a diaphragm or closure element is arranged, which is at least partially fixedly connected to the piston after the casting and remains in this and which closes the joint after removal of the casting core or forms an at least throttled intermediate sequence.
- the diaphragm or closure element are conceivable.
- at least one of the supports can, for example, mainly fulfill a support function and thus create no intermediate flow, in which case the diaphragm or closure element is designed as a closure element and the
- Cooling channel seals. It is also conceivable, of course, that the shutter or closure element at its end facing the cooling channel creates a permanent, throttled connection to the cooling channel and thereby creates an intermediate sequence.
- the actual inflow and outflow of the cooling channel can be created by one or two supports or by a later hole, through which the cooling channel is drilled. Generates the respective
- Embodiment of the shutter or closure element no fluid-conducting connection to the cooling channel, so it is in such a diaphragm or closure element around a pure closure element and in the
- a third support for supporting the casting core wherein the first-mentioned two supports are arranged adjacent to each other and form a later inlet and a drain of the cooling channel.
- the third support for supporting the same is arranged, which forms an intermediate sequence of the cooling channel and for this reason should have a significantly reduced cross-section.
- the third support has an aperture or closure element with a penetrating into the casting core pin on which a sleeve is mounted.
- Outer diameter of the pin is significantly reduced in comparison to the outer diameter of the sleeve, whereby at a successful after casting removal of the pin, the diameter of the intermediate sequence only the
- Diameter of the pin and not that of the sleeve corresponds.
- the sleeve remains in the piston even after casting, whereas the pin is removed.
- the soluble casting core which may be formed, for example, as a sand or as a salt core.
- the diameter and thus also the cross section of the intermediate sequence can be significantly reduced, whereby at least an undesirable flow of coolant can be reduced and a significantly improved cooling of the piston produced with the casting mold according to the invention can be achieved.
- the inlet and the outlet are close to each other in one embodiment of the piston according to the invention, so that the inflowing into the cooling channel via the inlet coolant, for example. Cooling oil, must flow through the entire cooling channel, before it can leave the cooling channel again via the drain.
- the cooling effect thereby improved involves the difficulty of supporting the casting core, since the inlet and the outlet are arranged on one side of the casting core.
- the third support is provided, whereby the casting core itself is clearly stabilized.
- the third support were designed in the manner of the first two supports, then the coolant would already run off after half of the cooling channel and thereby impair the desired cooling effect.
- the third support can fully unfold the actual supporting effect by the diaphragm or closure element according to the invention with the pin on which the sleeve is mounted, without creating the danger of excessive coolant outflow.
- the sleeve is in this case a diaphragm.
- the diaphragm or closure element or the sleeve has an outer circumferential groove.
- Such an external circumferential groove is on the one hand manufacture technically simplest and on the other hand causes the casting of the piston an inflow of casting material and thereby a reliable fixation of the diaphragm or closure element or the sleeve in the finished cast piston.
- the outer circumferential groove and a differently shaped contour for example. Pre- or jumping back, be provided which a gearing with the
- the sleeve has an outer diameter of about 4 to 5 mm, preferably of about 4.5 mm, and an inner diameter of about 1 to 2 mm, preferably of about 1, 8 mm ,
- the outer diameter of the pin essentially corresponds to the inner diameter of the sleeve, in this example, for example, 1, 8 mm.
- Inner diameter of the drain created thereby can be reduced by the sleeve according to the invention, the diameter of the intermediate sequence of, for example, 4.5 to 1, 8 mm, and thereby the effluent via the intermediate effluent coolant flow can be greatly reduced.
- the sleeve is expediently arranged between the casting core and a negative mold, in particular a further casting core, wherein the pin penetrates both into the casting core and into the negative mold, and this thereby
- the pin or the sleeve can be formed of metal, in particular of steel or of a steel alloy, wherein the pin not only causes the support function of the casting core deposited thereon, but also a fixation of the same against a lateral displacement or lifting of the supports.
- the diaphragm or closure element penetrates into the casting core pin wherein the diaphragm or closure element has a sleeve-like recess on its side facing away from the pin.
- the diaphragm or closure element can be fixed, for example, to a negative mold, whereas a fixation on the casting core via the penetrating into this pin.
- a fixation on the casting core via the penetrating into this pin.
- Pin and sleeve may be formed in one piece or in one piece or be connected in several parts and then with each other.
- FIG. 3 shows a representation of the casting mold according to the invention in the region of a third support, including a detailed representation
- Fig. 4-7 the mold according to the invention in the region of the third support in different embodiments.
- a casting mold 1 according to the invention of a piston 2 (see Fig. 2) of an internal combustion engine, not shown otherwise, has a soluble and substantially annular casting core 3 (see Fig. 1) for forming a cooling channel 4 (cf. Fig. 1 and 3), with two this core 3 during a casting bearing supports 5,6, which at a
- the cooling channel 4 is annular and interrupted only in the region of the inlet 7 and the outlet 8 with respect to the ring shape.
- the two supports 5, 6 are now arranged adjacent to one another, wherein a third support 9 for supporting the casting core 3 is provided on a side of the casting core 3 opposite the inlet 7 and the outlet 8.
- a diaphragm or closure element 15 is arranged at a connection point between at least one of the two supports 5, 6 or an additional third support 9 and the casting core 3, which is at least partially firmly connected to the piston 2 after the casting process and which the connection point Removal of the casting core 3 closes or forms an at least throttled intermediate drain 14.
- the diaphragm or closure element 15 has a pin 10 (see Fig. 3 to 7) penetrating into the casting core 3, on which a sleeve 11 is mounted.
- the inlet 7, the outlet 8 and / or the intermediate outlet 14, d. H. the support 9, may be formed substantially orthogonal to the ring plane of the casting core 3, as for example, the Fig. 1 can be seen.
- the diaphragm or closure element 15 or the sleeve 1 1 can moreover have a circumferential groove 12 (cf., FIGS. 3 and 4), which surrounds the sleeve 11 by penetration of casting material during casting of the piston 2 after removal of the pin 10 fixed in the piston 2.
- a circumferential groove 12 cf., FIGS. 3 and 4
- the circumferential groove 12 and other protruding or receding contours on an outer circumferential surface of the sleeve 1 1 may be arranged, which has an undercut-like connection with the circumferential groove 12 and other protruding or receding contours on an outer circumferential surface of the sleeve 1 1 may be arranged, which has an undercut-like connection with the
- Locking element 15 and the sleeve 1 1 reliably fix in the finished cast piston 2.
- the sleeve 1 as shown in Fig. 4,
- the sleeve 1 1 may, for example, an outer diameter of about 4 to 5 mm, preferably of about 4.5 mm, and an inner diameter of about 1 to 2 mm, preferably of about 1, 8 mm, have, wherein the Inner diameter of the sleeve 1 1 the
- the piston 2 may, for example, be cast as a light metal piston, in particular of an aluminum alloy, wherein for the material of the sleeve 1 1 and / or the pin 10 in particular an aluminum alloy, or a training in steel question comes.
- the pin 10 not only causes a vertical support of the casting core 3, but also a fixation thereof with respect to a lateral displacement and lifting, whereby an overall stiffer mold 1 can be created.
- Fig. 3 it can be seen that the sleeve 1 1 between the casting core 3 and a negative mold 13, for example.
- a metal mold or a sand / salt form is arranged, wherein the pin 10 in the casting core 3 and the Penetrating negative mold 13 and thereby fixes them together.
- the casting core 3 may be formed, for example, as a sand or salt core.
- an aperture or closure element 15 is shown with a sleeve 1 1, which is held over the pin 10 both in the casting core 3 and in the female mold 13.
- a reduced intermediate sequence 14 is created after the casting process with respect to its cross-section.
- the pin 10 may even be formed so long that the negative mold 13 penetrates.
- FIG. 5 is a diaphragm or
- Closing element 15 is shown, which is composed of a pin 10 and a sleeve 1 1, wherein the aperture or closure element 15 remains in the piston 2 after the casting process. This means that by the also remaining in the piston 2 pin 10 of the cooling channel 4 at the junction with the support 9 tight and thus leakage is freely closed.
- a similar embodiment is shown in Fig. 6, wherein pin 10 and sleeve 1 1 are made in one piece and thereby a one-piece aperture or
- Form closure element 15. 7 an embodiment of the diaphragm or closure element 15 is shown, which has a penetrating into the casting core 3 pin 10 which is an integral part of the diaphragm or closure element 15, wherein the diaphragm or closure element 15 on its the pin 10th opposite side has a sleeve-like recess 16.
- the diaphragm or closure element 15 can be held and fixed by a pin 10 'or a negative mold 13.
- Closure element 15, the sleeve 1 1 and the pin 10 can be used on all supports 5,6,9 and that in any configuration, since the inlet 7, the outlet 8 or the intermediate flow 14 are generally made in a later process step by means of a bore can.
- the casting core 3 which determines the later shape of the cooling channel 4 in the finished cast piston 2, is supported by the casting mold 1 at at least two opposite points. A support is included
- inlet and outlet 7,8 are located in the described cooling channel 4 adjacent on the same side of the piston 2, to a good cooling to get because the cooling fluid must flow through the entire cooling channel 4.
- Closure element 15 closes the cooling channel 4 completely or allows a reduced outflow of cooling fluid.
- the diaphragm or closure element 15 preferably has an outer contour, which allows a
- the soluble and substantially annular casting core 3 to support the cooling channel 4 is supported on three pillars 5, 6, 9 supporting this casting core 3 during the casting process, the first two pillars 5, 6 being arranged adjacent to one another and in the region of connection with the casting core 3 form the later inlet 7 and outlet 8 of the cooling channel 4.
- a shutter or closure element 15 is arranged, which is at least partially fixedly connected to the piston 2 after the casting process and which closes the connection point after removal of the casting core 3 or an at least throttled intermediate flow 14 forms.
- the diaphragm or closure element 15 has a casting core in the third
- the sleeve 1 1 is arranged between the casting core 3 and the negative mold 13, for example.
- the diaphragm or closure element 15 is designed as a diaphragm element or as a closure element, no or a reduced outflow of cooling fluid is possible.
- a particularly stable casting mold 1 can be created, whereby an undesirably high outflow of coolant from the cooling channel 4 at the location of the intermediate run 14 can be prevented via the aperture or closure element 15.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112015004342A BR112015004342A2 (pt) | 2012-08-31 | 2013-08-20 | molde de fundição de um pistão |
CN201380046736.6A CN104619438B (zh) | 2012-08-31 | 2013-08-20 | 用于活塞的铸模 |
JP2015528958A JP2015528538A (ja) | 2012-08-31 | 2013-08-20 | ピストン用鋳型 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012215543.0 | 2012-08-31 | ||
DE102012215543.0A DE102012215543A1 (de) | 2012-08-31 | 2012-08-31 | Gießform eines Kolbens |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014033012A1 true WO2014033012A1 (de) | 2014-03-06 |
Family
ID=49035572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2013/067308 WO2014033012A1 (de) | 2012-08-31 | 2013-08-20 | GIEßFORM EINES KOLBENS |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2015528538A (de) |
CN (1) | CN104619438B (de) |
BR (1) | BR112015004342A2 (de) |
DE (1) | DE102012215543A1 (de) |
WO (1) | WO2014033012A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105772630A (zh) * | 2016-04-19 | 2016-07-20 | 江苏远方动力科技有限公司 | 一种低合金高强度铸铁活塞的生产工艺 |
CN106715002A (zh) * | 2014-08-29 | 2017-05-24 | Fev欧洲有限责任公司 | 铸造缸盖中的水冷却系统及其制造方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015220256A1 (de) | 2015-10-19 | 2017-04-20 | Mahle International Gmbh | Verfahren zur Herstellung eines Kolbens |
US20180326477A1 (en) * | 2015-11-19 | 2018-11-15 | Ks Kolbenschmidt Gmbh | Cast Inflow And Outflow Openings For Cast-Steel And Cast Iron Pistons |
CN111535936A (zh) * | 2020-06-29 | 2020-08-14 | 安徽江淮汽车集团股份有限公司 | 一种发动机活塞 |
DE102022112177A1 (de) | 2022-05-16 | 2023-11-16 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Herstellen eines Gussbauteils sowie Gussform |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61113947U (de) * | 1984-12-26 | 1986-07-18 | ||
JPH02123260A (ja) * | 1988-10-31 | 1990-05-10 | Izumi Ind Ltd | 内燃機関用ピストンの製造方法 |
JPH0578954U (ja) * | 1992-04-06 | 1993-10-26 | いすゞ自動車株式会社 | 内燃機関のピストン |
DE19804168A1 (de) | 1997-02-17 | 1998-08-20 | Unisia Jecs Corp | Stützen für einen lösbaren Kern |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006053179A1 (de) * | 2005-11-10 | 2007-05-16 | Ks Kolbenschmidt Gmbh | Einteiliger Stahlkolben als Feinguss-Variante mit Kern für die feingusstechnische Herstellung eines Kühlkanales |
DE102006030699B4 (de) * | 2006-06-30 | 2014-10-02 | Daimler Ag | Gegossener Stahlkolben für Verbrennungsmotoren |
DE102008020231A1 (de) * | 2008-04-22 | 2009-10-29 | Mahle International Gmbh | Gießkern zur Bildung eines Kühlkanals |
CN102076936A (zh) * | 2008-07-03 | 2011-05-25 | 沃尔沃拉斯特瓦格纳公司 | 内燃机活塞 |
DE102011086411A1 (de) * | 2011-11-15 | 2013-05-16 | Mahle International Gmbh | Gießform für einen Kolben |
-
2012
- 2012-08-31 DE DE102012215543.0A patent/DE102012215543A1/de not_active Withdrawn
-
2013
- 2013-08-20 JP JP2015528958A patent/JP2015528538A/ja active Pending
- 2013-08-20 WO PCT/EP2013/067308 patent/WO2014033012A1/de active Application Filing
- 2013-08-20 CN CN201380046736.6A patent/CN104619438B/zh not_active Expired - Fee Related
- 2013-08-20 BR BR112015004342A patent/BR112015004342A2/pt not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61113947U (de) * | 1984-12-26 | 1986-07-18 | ||
JPH02123260A (ja) * | 1988-10-31 | 1990-05-10 | Izumi Ind Ltd | 内燃機関用ピストンの製造方法 |
JPH0578954U (ja) * | 1992-04-06 | 1993-10-26 | いすゞ自動車株式会社 | 内燃機関のピストン |
DE19804168A1 (de) | 1997-02-17 | 1998-08-20 | Unisia Jecs Corp | Stützen für einen lösbaren Kern |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106715002A (zh) * | 2014-08-29 | 2017-05-24 | Fev欧洲有限责任公司 | 铸造缸盖中的水冷却系统及其制造方法 |
CN106715002B (zh) * | 2014-08-29 | 2019-02-05 | Fev欧洲有限责任公司 | 铸造缸盖中的水冷却系统及其制造方法 |
US10711731B2 (en) | 2014-08-29 | 2020-07-14 | FEV Europe GmbH | Method for manufacturing a water cooling system in a casted cylinder head and water cooling system in a casted cylinder head |
CN105772630A (zh) * | 2016-04-19 | 2016-07-20 | 江苏远方动力科技有限公司 | 一种低合金高强度铸铁活塞的生产工艺 |
Also Published As
Publication number | Publication date |
---|---|
CN104619438A (zh) | 2015-05-13 |
BR112015004342A2 (pt) | 2017-07-04 |
CN104619438B (zh) | 2017-06-09 |
DE102012215543A1 (de) | 2014-03-06 |
JP2015528538A (ja) | 2015-09-28 |
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