EP1888272A1 - Verkürzung der taktzeit bei der serienherstellung von kolben für brennkraftmaschinen - Google Patents
Verkürzung der taktzeit bei der serienherstellung von kolben für brennkraftmaschinenInfo
- Publication number
- EP1888272A1 EP1888272A1 EP06762039A EP06762039A EP1888272A1 EP 1888272 A1 EP1888272 A1 EP 1888272A1 EP 06762039 A EP06762039 A EP 06762039A EP 06762039 A EP06762039 A EP 06762039A EP 1888272 A1 EP1888272 A1 EP 1888272A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- feeder
- piston
- mold
- melt
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/02—Top casting
-
- 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
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
Definitions
- the invention relates to a method for series production of a piston for internal combustion engines according to the features of the preamble of claim 1.
- pistons casting tools which represent a negative mold for the piston blank to be produced and which are filled via a feed system with casting melt.
- These are generally multi-part tools, consisting of two outer mold halves, a one- or multi-part core, which defines the small conrod-facing inner contour of the piston and a casting tray with central feeder, which defines the combustion chamber facing surface of the piston blank , While the core and outer mold halves remain close to one another even after the casting tool has been opened, the pouring tray is moved up to two meters away from the casting tool to improve access to the mold removal.
- the inner surface of the feeder is usually lined with thermally highly insulating material.
- the feeder which is also filled with melt, should be kept liquid until complete solidification of the casting in order to provide sufficient melt for the make-up to compensate for the volume contraction during solidification.
- the volume decreases by several percent. Since metal-free spaces (cavities) in the product must be avoided in any case, the feeder is arranged so that e.g. due to gravity melt from it can flow into the product.
- the invention is therefore an object of the invention to provide a method for mass production of a piston for internal combustion engines, with reduced by shortening the solidification time, the cycle time and productivity can be significantly increased. According to the invention this object is solved by the features of claim 1.
- the mold is opened before the molten casting has formed a dimensionally stable edge shell in the region of the feeder or the feeder contents has become altogether sufficiently strong in order to maintain its shape and thus also its function. That is, the time to open the mold is chosen so early that if one suddenly removed all parts of the mold from the piston blank, the part of the piston blank that would be the feeder would spread in the form of a "puddle" over the piston Opening the casting mold here and below means that after filling the casting mold with melt, parts of the casting mold change their position so far that the piston can be removed.
- the solution can also be such that only a part of the casting floor, preferably the insulating feeder sleeve, remains on the dismantled piston and is not returned to the tool until the casting of the second but one piston.
- the shape of the piston blank can be reshaped to form tightly around the feeder a circumferentially closed ramp of sufficient height in the piston axial direction (FIG. 3) which holds the riser contents in position after removal from the casting tool and the function of the feeder guaranteed.
- a thin-walled design of the wall ensures that it solidifies early.
- the piston blank is cooled. After the piston blank has been removed from the casting mold, the casting melt is not yet solidified in the feeder area and possibly also in the adjoining area of the piston crown. To bescheunigen the cooling of the piston blank with the still molten feeder outside the actual mold, the piston blank is therefore cooled, which can be done, for example, that the piston blank with the molded feeder up to a predetermined height (or possibly complete) in a bath with cooling liquid is placed, with a cooling gas or a cooling counter body is surrounded. Overall, the invention thus provides the advantage of a shorter cycle time, is not waited during solidification until the molten casting is completely solidified in the mold including the feeder, but the piston blank is already removed from the mold, and the complete emptying outside the Mold is done.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06762039T PL1888272T3 (pl) | 2005-06-15 | 2006-06-14 | Skrócenie czasu wykonania cyklicznej, seryjnej produkcji tłoków do silników spalinowych |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005027540A DE102005027540A1 (de) | 2005-06-15 | 2005-06-15 | Verkürzung der Taktzeit bei der Serienherstellung von Kolben für Brennkraftmaschinen |
PCT/EP2006/005701 WO2006133914A1 (de) | 2005-06-15 | 2006-06-14 | Verkürzung der taktzeit bei der serienherstellung von kolben für brennkraftmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1888272A1 true EP1888272A1 (de) | 2008-02-20 |
EP1888272B1 EP1888272B1 (de) | 2009-10-28 |
Family
ID=36999898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06762039A Revoked EP1888272B1 (de) | 2005-06-15 | 2006-06-14 | Verkürzung der taktzeit bei der serienherstellung von kolben für brennkraftmaschinen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1888272B1 (de) |
AT (1) | ATE446812T1 (de) |
DE (2) | DE102005027540A1 (de) |
PL (1) | PL1888272T3 (de) |
WO (1) | WO2006133914A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010003346A1 (de) | 2010-03-26 | 2011-09-29 | Federal-Mogul Nürnberg GmbH | Verfahren und Vorrichtung zum Gießen eines Kolbens für einen Verbrennungsmotor |
DE102010003345B4 (de) | 2010-03-26 | 2012-02-23 | Federal-Mogul Nürnberg GmbH | Verfahren und Vorrichtung zum Gießen eines Kolbens für einen Verbrennungsmotor |
EP2527060A1 (de) * | 2011-05-24 | 2012-11-28 | Georg Fischer Automobilguss GmbH | Giessverfahren für Dauerformen |
DE102014216517A1 (de) * | 2014-08-20 | 2016-02-25 | Mahle International Gmbh | Gießwerkzeug und Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2137836A1 (de) * | 1971-07-28 | 1973-02-08 | Karl Dipl Ing Dr Ableidinger | Isolierauskleidung fuer speiser und kokillenkoepfe |
JPS5886968A (ja) * | 1981-11-20 | 1983-05-24 | Izumi Jidosha Kogyo Kk | 繊維強化アルミニウム合金製ピストンの製造方法 |
JP3068185B2 (ja) * | 1990-11-05 | 2000-07-24 | コマルコ アルミニウム リミティド | 金属の鋳造 |
JPH07124695A (ja) * | 1993-11-08 | 1995-05-16 | Toyota Motor Corp | 鋳造装置 |
DE102004052231A1 (de) * | 2004-10-27 | 2006-05-11 | Ks Kolbenschmidt Gmbh | Verfahren zur Serienherstellung von Kolben für Brennkraftmaschinen unter Gasdruckeinwirkung |
-
2005
- 2005-06-15 DE DE102005027540A patent/DE102005027540A1/de not_active Withdrawn
-
2006
- 2006-06-14 PL PL06762039T patent/PL1888272T3/pl unknown
- 2006-06-14 WO PCT/EP2006/005701 patent/WO2006133914A1/de active Application Filing
- 2006-06-14 AT AT06762039T patent/ATE446812T1/de active
- 2006-06-14 EP EP06762039A patent/EP1888272B1/de not_active Revoked
- 2006-06-14 DE DE502006005251T patent/DE502006005251D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006133914A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006133914A1 (de) | 2006-12-21 |
PL1888272T3 (pl) | 2010-02-26 |
ATE446812T1 (de) | 2009-11-15 |
EP1888272B1 (de) | 2009-10-28 |
DE102005027540A1 (de) | 2006-12-28 |
DE502006005251D1 (de) | 2009-12-10 |
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