US3459253A - Method of casting pistons - Google Patents
Method of casting pistons Download PDFInfo
- Publication number
- US3459253A US3459253A US441180A US3459253DA US3459253A US 3459253 A US3459253 A US 3459253A US 441180 A US441180 A US 441180A US 3459253D A US3459253D A US 3459253DA US 3459253 A US3459253 A US 3459253A
- Authority
- US
- United States
- Prior art keywords
- piston
- core
- casting
- soluble
- cavity
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- 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
- B22C9/105—Salt cores
-
- 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
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/002—Removing cores by leaching, washing or dissolving
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/001—One-piece pistons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Aug. 5, 1969 A. J. WOOLCOTT 3,459,253
ma'raob 0F CASTING PISTONS Filed March 19. 1965 2 Sheets-Sheet 1 Inventor I By 8- 1969 A. J. WOOLCO'I'T 3,459,253
METHOD OF CASTING PISTONS Filed March 19, 1965 2 Sheets-Sheet 2 I nvenlor y I a United States Patent 3,459,253 METHOD OF CASTING PISTONS Arthur John Woolcott, Lymington, England, assignor to Wellworthy Limited, Lymington, England, a British company Filed Mar. 19, 1965, Ser. No. 441,18 Claims priority, application Great Britain, Mar. 25, 1964, 12,737/ 64 Int. Cl. B22c 9/02, 7/02 U.S. Cl. 16436 8 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to the casting of pistons particularly from aluminum and its alloys, and to soluble cores for use in casting such pistons.
In the manufacture of pistons, it is already known to cast one or more cooling tubes into the piston, the tube or tubes being made for example of steel, copper or aluminum, but in such a process cavities can exist between the outside of a tube and the body of the piston. Cavities may particularly exist on the upper side of a tube where oxides tend to drag around the tube forming a pocket or envelope preventing the material of the piston from closely adhering to the tube. Since the purpose of the tubes is to form ducts through which are conveyed liquid or gas in order to cool the piston, the presence of such cavities reduces the heat transfer between the material of the piston and the tubes and accordingly detracts from the cooling eificiency of the tubes.
It has also been proposed to cast aluminum pistons around a copper tube which is subsequently dissolved away to leave a cooling passage or passages in the piston. However when the copper is dissolved out, an intermetallie of copper and aluminum is left on the surface of the passage which produces an undesirable surface finish giving stress raisers which can lead to fatigue failures.
According to one aspect of the invention, at least one cavity is formed in a piston during the casting of the piston by firstly forming a core of a water soluble salt to the shape or configuration of the cavity or cavities to be formed in the piston, casting the piston around this core, and then dissolving the core. Preferably the soluble core is formed by casting the molten salt.
The invention also provides a cast metal piston having at least one cavity therein, wherein the metal of the piston apart from any inserts of a different metal on the external surface of the piston, is of substantially constant composition from its external surface to the wall of the cavity or of each cavity.
The soluble core may be so shaped and positioned relative to the piston mould that when the piston is cast one or more cooling passages are formed behind the ring grooves in the piston. Alternatively or additionally a soluble core may be employed to form a combustion chamber in the crown of the piston. After the piston has been cast it is removed from the mould and the soluble core is dissolved.
Patented Aug. 5, 1969 It has been found that the soluble core may advantageously be made by casting it from molten sulphate or carbonate based salts and which can be dissolved in water, preferably hot or warm, after the piston has been cast around the core. Such salts when sulphate based have a relatively high solubility at a temperature of 30 to 35 C. Whilst at lower temperatures this solubility s very much reduced. This permits good recovery of the salts which can be extracted from the cooled solution in the crystalline form after the core has dissolved.
Examples of such salts are:
Sodium sulphate by itself Sodium sulphate with up to 20% potassium sulphate Sodium sulphate with up to 15% sodium chloride Sodium carbonate with up to 10% potassium carbonate (All percentages are molar) The soluble core may be reinforced, where and if required with metal wire or glass fibre members around which the molten salt is cast and whose ends may be arranged to protrude from the cavity formed by the core so that they can readily be removed when the core is dissolved. The core may also be strengthened by the addition of a proportion of refractory or insoluble filler material such as alumina or calcium sulphate.
Examples of such compositions are:
Sodium sulphate with up to 10% aluminum oxide (alumina) Sodium sulphate with up to 10% calcium sulphate Sodium carbonate with up to 10% barium carbonate It is important that the soluble core retains its strength during a casting operation, but its thermal expansion must be as low as is practicable since a high expansion imposes a strain on any reinforcing or support members for the core. Moreover sudden changes in thermal expansion must be avoided. The surface finish of the soluble core must be reasonably smooth in order to impart a good finish to the cavity formed by the core in the piston. The material forming the soluble core must also be sufficiently soluble in water for the core to be dissolved in a time which is reasonable for commercial manufacture.
Further compositions of salts, which fulfil the aforementioned requirements are sodium sulphate with from 2 to 10% of lithium sulphate and/or 0 to 5% of barium sulphate (all percentages are molar).
The invention will now be further described by way of example, with reference to the accompanying drawings in which:
FIGURE 1 shows one embodiment of a soluble core which may be used in the method of casting a piston according to this invention.
FIGURE 2 is a cross section through one half of a piston formed around the core of FIGURE 1, and
FIGURE 3 shows an embodiment of piston incorporating a combustion chamber.
Referring to FIGURE 1, there is shown a soluble core 1 for forming an annular cooling passage in a piston and which is cast in a mould, such as a metal mould, from a sulphate based salt having one of the compositions hereinbefore set forth. The core comprises a ring shaped portion 2 and four depending limbs 3. -It is cast around wire reinforcing members 4 whose ends 4a project from the limbs 3. The limbs serve to support the soluble core on a sand core or metal die plug -5 shown in broken lines and which forms the portion of the piston mould or core around which the piston is cast. After the piston has been cast, for example from an aluminum alloy, the piston sand mould is broken away or the die plug removed and the soluble core 1 is dissolved from the cavity formed in the piston by means of warm or hot water. As shown 3 in FIGURE 2 the piston 6 thus formed is provided with an annular cooling passage 7 behind the ring belt through which a coolant liquid or gas may be passed via the inlet 7a formed by the support limbs. The reinforcing wires 4 provided in the soluble core may easily be withdrawn from the cavity formed in the piston, since their ends 4a project from the ducts 7 which are formed by the limbs 3.
FIGURE 3 is a cross-section of an embodiment of piston 8 which instead of being formed with an annular cooling passage as in the embodiment of FIGURE 2, is formed with a cavity 9 in its crown, this cavity serving as a combustion chamber to assist in the combustion of fuel. The cavity 9 which, as can be seen, as an undercut form may readily be fashioned by employing a soluble core of suitable configuration, which is dissolved way after the piston has been cast.
Whilst particular embodiments have been described it will be understood that various modifications may be made without departing from the scope of this invention. Thus the soluble cores can be shaped so as to provide cooling passages of other than plain annular form. For example the passages may include a plurality of radial portions.
It will also be appreciated that other cavities of complex form which it would be diflicult or expensive to machine may be formed in a piston my means of the method according to the present invention, besides the cooling passages and combustion chambers specifically described.
I claim:
1. A method of casting a metal piston having at least one cavity therein, which includes the steps of firstly casting a core from a molten water soluble salt to the shape or configuration of at least one cavity to be formed in the piston, whereby the salt core is free from water of crystallization, casting the piston around this core and then dissolving the soluble core.
2. A method of casting a metal piston having at least one cavity therein, which includes the steps of firstly forming at least one core by casting a molten water soluble salt to the shape or configuration of the cavity or cavities to be formed in the piston, whereby the salt core is free from water of crystallisation, supporting said at least one core in the piston mould, casting the piston around said at least one core in the mould, removing the piston from the mould and then dissolving the at least one soluble core by means of water.
3. The method as claimed in claim 2, wherein at least one cavity is in the form of a cooling passage.
4. The method as claimed in claim 2, wherein at least one cavity is in the form of a combustion chamber in the crown of the piston.
5. The method as claimed in claim 2, in which the soluble core is made from a sulphate based salt.
6. The method as claimed in claim 5, in which the soluble core comprises sodium sulphate with an additive constituted by a member selected from the group consistingof up to 20% M potassium sulphate, 15% M sodium chloride, 10% M lithium sulphate, 5% M barium sulphate, 10% M aluminum oxide, 10% M calcium sulphate, and 0 to 5% M barium sulphate with 2 to 10% M lithium sulphate.
7. The method as claimed in claim 2, in which the soluble core is made from a carbonate based salt.
8. The method as claimed in claim 7, in which the soluble core comprises sodium carbonate with an additive constituted by a member selected from the group consisting of up to 10% M potassium carbonate and 10% M barium carbonate.
References Cited UNITED STATES PATENTS 3,311,956 4/1967 Townsend et al. 24961 3,372,829 3/1968 Townsend et a1. 24961 3,356,129 12/1967 Anderko et al. 164-138 3,149,383 9/1964 Seytfer et al. 24961 X 3,138,856 6/1964 Kuchek 164-110 X 392,573 11/1888 Thompson 164-79 X 1,769,455 7/1930 Pickering 164-369 2,076,971 4/1937 Soulis et al. 164369 2,420,851 5/1947 Zahn et al. 2,474,186 6/ 1949 Marks. 2,688,781 9/1954 Fahlberg et al. 164-411 X 2,752,653 7/1956 Emblem et al. 3,126,595 3/1964 Dewey et al.
FOREIGN PATENTS 632,972 12/1949 Great Britain.
872,642 7/1961 Great Britain.
872,641 7/1961 Great Britain.
OTHER REFERENCES Soluble Cores, by W. A. .Dubovick, pp. 38-40, Precision Metal Molding, vol. 14, No. 7.
J. SPENCER OVERHOLSER, Primary Examiner V. RISING, Assistant Examiner U.S. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12737/64A GB1055737A (en) | 1964-03-25 | 1964-03-25 | Improvements in casting processes |
Publications (1)
Publication Number | Publication Date |
---|---|
US3459253A true US3459253A (en) | 1969-08-05 |
Family
ID=10010174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US441180A Expired - Lifetime US3459253A (en) | 1964-03-25 | 1965-03-19 | Method of casting pistons |
Country Status (5)
Country | Link |
---|---|
US (1) | US3459253A (en) |
CH (1) | CH436587A (en) |
ES (1) | ES310930A1 (en) |
GB (1) | GB1055737A (en) |
NL (1) | NL6503649A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3645491A (en) * | 1969-07-22 | 1972-02-29 | Aeroplane Motor Aluminum Casti | Soluble metal casting cores comprising a water-soluble salt and a synthetic resin |
US3991811A (en) * | 1974-01-18 | 1976-11-16 | Karl Schmidt Gmbh | Process for manufacturing a light alloy piston having an annular cooling passage in its head portion |
FR2405770A1 (en) * | 1977-10-13 | 1979-05-11 | Alcan Aluminiumwerke | MATERIAL FOR FOUNDRY CORES |
WO1985004605A1 (en) * | 1984-04-07 | 1985-10-24 | Gkn Technology Limited | Method of squeeze forming metal articles |
US4632169A (en) * | 1985-05-01 | 1986-12-30 | Outboard Marine Corporation | Two cycle cylinder block foam pattern |
EP0211280A2 (en) * | 1985-07-26 | 1987-02-25 | Ae Plc | Improvements in or relating to the production of engineering components |
US4776075A (en) * | 1986-06-27 | 1988-10-11 | Aisin Seiki Kabushiki Kaisha | Method for manufacturing piston of internal combustion engine |
US4802447A (en) * | 1985-12-17 | 1989-02-07 | Brunswick Corporation | Foam pattern for engine cylinder block |
US4875517A (en) * | 1989-05-01 | 1989-10-24 | Brunswick Corporation | Method of producing salt cores for use in die casting |
US5614232A (en) * | 1992-05-07 | 1997-03-25 | Minnesota Mining And Manufacturing | Method of making an interengaging fastener member |
US20040064943A1 (en) * | 2001-11-28 | 2004-04-08 | Gens Thomas D. | Axial piston pump barrel with a cast high pressure collection cavity |
US20060118076A1 (en) * | 2003-06-07 | 2006-06-08 | Gottfried Schnaitmann | Piston for a combustion engine and casting method for the production thereof |
EP1674173A1 (en) * | 2003-09-17 | 2006-06-28 | Jun Dwell-S 205 Yaokawa | Core for use in casting |
US20060243421A1 (en) * | 2005-04-29 | 2006-11-02 | United States Of America, Represented By Secretary Of The U.S. Army | Soluble casting core for metal matrix composite components and method of producing thereof |
US20090025550A1 (en) * | 2005-12-21 | 2009-01-29 | Arnold Benz | Piston for an Internal Combustion Engine and Method for its Production |
WO2012055964A1 (en) * | 2010-10-29 | 2012-05-03 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine |
DE102011076455A1 (en) * | 2011-05-25 | 2012-11-29 | Mahle International Gmbh | Casting core for forming a cooling channel in a piston |
US20130068176A1 (en) * | 2011-09-19 | 2013-03-21 | Julian Medvedec | Casting mould of a piston |
DE102011086411A1 (en) * | 2011-11-15 | 2013-05-16 | Mahle International Gmbh | Mold for a piston |
EP1930578B1 (en) | 2006-11-28 | 2019-09-25 | KS Kolbenschmidt GmbH | Cooling duct variant for pistons |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2123727B (en) * | 1982-06-25 | 1985-11-20 | Ae Plc | Pressure-casting pistons |
IN160562B (en) * | 1983-04-26 | 1987-07-18 | Gkn Technology Ltd | |
DE3932562A1 (en) * | 1989-09-29 | 1991-04-11 | Kolbenschmidt Ag | DEVICE FOR PRODUCING LIGHT METAL PISTON FOR INTERNAL COMBUSTION ENGINES |
DE10003821C5 (en) * | 2000-01-28 | 2008-06-26 | Ks Kolbenschmidt Gmbh | Piston, in particular a light metal piston for an internal combustion engine |
CN104353790B (en) * | 2014-11-12 | 2016-06-29 | 中船重工西安东仪科工集团有限公司 | The preparation method of closed type space curved surface structural casting core |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US392573A (en) * | 1888-11-06 | thompson | ||
US1769455A (en) * | 1929-08-28 | 1930-07-01 | Doehler Die Casting Co | Core for undercut cup-shaped articles |
US2076971A (en) * | 1930-05-26 | 1937-04-13 | Harold A Soulis | Piston mold |
US2420851A (en) * | 1943-07-08 | 1947-05-20 | Austenal Lab Inc | Method of making patterns and use thereof |
US2474186A (en) * | 1947-02-07 | 1949-06-21 | Crane Co | Reinforced core |
GB632972A (en) * | 1947-06-25 | 1949-12-05 | Dunlop Rubber Co | Improvements in or relating to cores suitable for making moulded articles and to the production of such articles |
US2688781A (en) * | 1949-11-12 | 1954-09-14 | Schwoegler | Self-eliminating core wire and core |
US2752653A (en) * | 1954-03-09 | 1956-07-03 | Rolls Royce | Method of and dies for forming hollow expendable patterns for casting |
GB872642A (en) * | 1957-08-15 | 1961-07-12 | Sulzer Ag | Producing moulds for foundry purposes |
GB872641A (en) * | 1957-08-15 | 1961-07-12 | Sulzer Ag | Producing moulds for foundry purposes |
US3126595A (en) * | 1964-03-31 | Method of reinforcing green sand cores | ||
US3138856A (en) * | 1961-10-09 | 1964-06-30 | Dow Chemical Co | Method of producing clad porous metal articles |
US3149383A (en) * | 1960-02-26 | 1964-09-22 | Rockwell Gmbh | Method of protecting cylinder liner transfer openings from casting material during injection die-casting of cylinders |
US3311956A (en) * | 1965-05-24 | 1967-04-04 | Kaiser Aluminium Chem Corp | Casting process employing soluble cores |
US3356129A (en) * | 1964-06-30 | 1967-12-05 | Schmidt Gmbh Karl | Process of casting metals by use of water-soluble salt cores |
US3372829A (en) * | 1964-05-18 | 1968-03-12 | Union Steel Prod Co | Portable and collapsible stacking bins or crates |
-
1964
- 1964-03-25 GB GB12737/64A patent/GB1055737A/en not_active Expired
-
1965
- 1965-03-19 US US441180A patent/US3459253A/en not_active Expired - Lifetime
- 1965-03-23 CH CH402265A patent/CH436587A/en unknown
- 1965-03-23 NL NL6503649A patent/NL6503649A/xx unknown
- 1965-03-24 ES ES0310930A patent/ES310930A1/en not_active Expired
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3126595A (en) * | 1964-03-31 | Method of reinforcing green sand cores | ||
US392573A (en) * | 1888-11-06 | thompson | ||
US1769455A (en) * | 1929-08-28 | 1930-07-01 | Doehler Die Casting Co | Core for undercut cup-shaped articles |
US2076971A (en) * | 1930-05-26 | 1937-04-13 | Harold A Soulis | Piston mold |
US2420851A (en) * | 1943-07-08 | 1947-05-20 | Austenal Lab Inc | Method of making patterns and use thereof |
US2474186A (en) * | 1947-02-07 | 1949-06-21 | Crane Co | Reinforced core |
GB632972A (en) * | 1947-06-25 | 1949-12-05 | Dunlop Rubber Co | Improvements in or relating to cores suitable for making moulded articles and to the production of such articles |
US2688781A (en) * | 1949-11-12 | 1954-09-14 | Schwoegler | Self-eliminating core wire and core |
US2752653A (en) * | 1954-03-09 | 1956-07-03 | Rolls Royce | Method of and dies for forming hollow expendable patterns for casting |
GB872642A (en) * | 1957-08-15 | 1961-07-12 | Sulzer Ag | Producing moulds for foundry purposes |
GB872641A (en) * | 1957-08-15 | 1961-07-12 | Sulzer Ag | Producing moulds for foundry purposes |
US3149383A (en) * | 1960-02-26 | 1964-09-22 | Rockwell Gmbh | Method of protecting cylinder liner transfer openings from casting material during injection die-casting of cylinders |
US3138856A (en) * | 1961-10-09 | 1964-06-30 | Dow Chemical Co | Method of producing clad porous metal articles |
US3372829A (en) * | 1964-05-18 | 1968-03-12 | Union Steel Prod Co | Portable and collapsible stacking bins or crates |
US3356129A (en) * | 1964-06-30 | 1967-12-05 | Schmidt Gmbh Karl | Process of casting metals by use of water-soluble salt cores |
US3311956A (en) * | 1965-05-24 | 1967-04-04 | Kaiser Aluminium Chem Corp | Casting process employing soluble cores |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3645491A (en) * | 1969-07-22 | 1972-02-29 | Aeroplane Motor Aluminum Casti | Soluble metal casting cores comprising a water-soluble salt and a synthetic resin |
US3991811A (en) * | 1974-01-18 | 1976-11-16 | Karl Schmidt Gmbh | Process for manufacturing a light alloy piston having an annular cooling passage in its head portion |
FR2405770A1 (en) * | 1977-10-13 | 1979-05-11 | Alcan Aluminiumwerke | MATERIAL FOR FOUNDRY CORES |
US4667727A (en) * | 1984-04-07 | 1987-05-26 | Gkn Technology Limited | Method of squeeze forming metal articles |
WO1985004605A1 (en) * | 1984-04-07 | 1985-10-24 | Gkn Technology Limited | Method of squeeze forming metal articles |
US4632169A (en) * | 1985-05-01 | 1986-12-30 | Outboard Marine Corporation | Two cycle cylinder block foam pattern |
EP0211280A3 (en) * | 1985-07-26 | 1988-10-12 | Ae Plc | Improvements in or relating to the production of engineering components |
EP0211280A2 (en) * | 1985-07-26 | 1987-02-25 | Ae Plc | Improvements in or relating to the production of engineering components |
US4802447A (en) * | 1985-12-17 | 1989-02-07 | Brunswick Corporation | Foam pattern for engine cylinder block |
US4776075A (en) * | 1986-06-27 | 1988-10-11 | Aisin Seiki Kabushiki Kaisha | Method for manufacturing piston of internal combustion engine |
US4875517A (en) * | 1989-05-01 | 1989-10-24 | Brunswick Corporation | Method of producing salt cores for use in die casting |
US5614232A (en) * | 1992-05-07 | 1997-03-25 | Minnesota Mining And Manufacturing | Method of making an interengaging fastener member |
US20040064943A1 (en) * | 2001-11-28 | 2004-04-08 | Gens Thomas D. | Axial piston pump barrel with a cast high pressure collection cavity |
US7093341B2 (en) * | 2001-11-28 | 2006-08-22 | Caterpillar Inc. | Method of making an axial piston pump barrel with a cast high pressure collection cavity |
US7213562B2 (en) * | 2003-06-07 | 2007-05-08 | Mahle Gmbh | Piston for a combustion engine and casting method for the production thereof |
US20060118076A1 (en) * | 2003-06-07 | 2006-06-08 | Gottfried Schnaitmann | Piston for a combustion engine and casting method for the production thereof |
EP1674173A1 (en) * | 2003-09-17 | 2006-06-28 | Jun Dwell-S 205 Yaokawa | Core for use in casting |
EP1674173A4 (en) * | 2003-09-17 | 2006-12-20 | Yaokawa Jun Dwell S 205 | Core for use in casting |
US20060185815A1 (en) * | 2003-09-17 | 2006-08-24 | Jun Yaokawa | Expandable core for use in casting |
US20070131374A1 (en) * | 2005-04-29 | 2007-06-14 | U.S. Government, Represented By Secretary Of The Army | Soluble Casting Core For Metal Matrix Composite Components and Method of Producing Thereof |
US20060243421A1 (en) * | 2005-04-29 | 2006-11-02 | United States Of America, Represented By Secretary Of The U.S. Army | Soluble casting core for metal matrix composite components and method of producing thereof |
US20090025550A1 (en) * | 2005-12-21 | 2009-01-29 | Arnold Benz | Piston for an Internal Combustion Engine and Method for its Production |
US7921555B2 (en) * | 2005-12-21 | 2011-04-12 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
EP1930578B1 (en) | 2006-11-28 | 2019-09-25 | KS Kolbenschmidt GmbH | Cooling duct variant for pistons |
WO2012055964A1 (en) * | 2010-10-29 | 2012-05-03 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine |
DE102011076455A8 (en) * | 2011-05-25 | 2013-01-31 | Mahle International Gmbh | Casting core for forming a cooling channel in a piston |
US8733315B2 (en) | 2011-05-25 | 2014-05-27 | Mahle International Gmbh | Casting core for forming a cooling channel in a piston |
DE102011076455A1 (en) * | 2011-05-25 | 2012-11-29 | Mahle International Gmbh | Casting core for forming a cooling channel in a piston |
US20130068176A1 (en) * | 2011-09-19 | 2013-03-21 | Julian Medvedec | Casting mould of a piston |
DE102011086411A1 (en) * | 2011-11-15 | 2013-05-16 | Mahle International Gmbh | Mold for a piston |
Also Published As
Publication number | Publication date |
---|---|
ES310930A1 (en) | 1966-01-01 |
CH436587A (en) | 1967-05-31 |
NL6503649A (en) | 1965-09-27 |
GB1055737A (en) | 1967-01-18 |
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