US3844334A - Method of casting cylinders - Google Patents
Method of casting cylinders Download PDFInfo
- Publication number
- US3844334A US3844334A US00314468A US31446872A US3844334A US 3844334 A US3844334 A US 3844334A US 00314468 A US00314468 A US 00314468A US 31446872 A US31446872 A US 31446872A US 3844334 A US3844334 A US 3844334A
- Authority
- US
- United States
- Prior art keywords
- article
- core
- mold
- core member
- forming
- 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
- 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
- B22D29/005—Removing cores by vibrating or hammering
-
- 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
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49988—Metal casting
- Y10T29/49989—Followed by cutting or removing material
Definitions
- ABSTRACT A method for manufacturing aluminum cylinders wherein an aluminum or magnesium core including a plurality of protuberances is employed.
- the cylinder is die cast in a mold in which the core member is located. After removal from the mold, the entire main body portion of the cylindrical core is machined out leaving the protuberances remaining within the wall of the cast articlefThe article is mechanically impacted to loosen and knock out the protuberances from within the article.
- This invention relates to the casting of hollow pieces by the use of what are usually characterized as permanent molds and which are hereinafter referred to merely as molds.” More specifically, the invention is directed to an improved method and apparatus for die casting articles of manufacture having irregular hollow cavities and holes formed therein.
- Pump bodies and internal combustion engine blocks are presently being manufactured by various die casting processes.
- a common method for casting lightweight internal combustion engine cylinders is to cast an aluminum body around an iron liner having various ports and blisters formed therein.
- the aluminum cylinder having the iron liner cast therein is machined to provide inlet and exhaust ports which extend entirely through the walls of the cylinder. This machining may be extensive and must be precise so as to constitute a time-consuming and expensive step in the cylinder forming process.
- the iron liner about which the cylinder body is cast often has different heat expansion and heat transfer characteristics than the surrounding aluminum. As the result of these property differences, the iron liner and the surrounding body do not expand evenly when operationally incorporated in an internal combustion engine application. This uneven expansion causes distortion of the cylinder at elevated temperatures which distortion, in turn, causes a loss of engine power. Since distortion upsets the critical tolerances of an engine, the seal between piston rings and the inner bore surface of the cylinder becomes less effective and blow-by may result which has the effect of corroding various elements of the engine such as the wrist pins.
- the different heat transfer coefficient of the iron liner with respect to the surrounding aluminum cylinder body presents cooling problems in conducting heat from within the cylinder, through the iron liner, through the aluminum body and, thence, to the cooling fins formed on the cylinder.
- the existing need for lightweight engines, for example in chain saws militates against the use of a heavy iron liner so that it would be an overall improvement in the art if many lightweight cylinder configurations could be easily formed without including such a liner.
- the present invention is therefore directed to the die casting of articles such as aluminum internal combustion engine cylinders which heretofore have been traditionally constructed as composite articles.
- the objects of the present invention are carried out by providing a method and an apparatus for casting hollow articles in which molten die casting material is introduced into a die having a core positioned therein.
- the die casting material is cooled until it solidifies and is then removed from the mold.
- a major portion of the core is machined from within the case article which is then mechanically impacted to knock-out the remaining portions of the core.
- FIG. 1 is a sectional view taken along the axis of an internal combustion engine cylinder constructed in accordance with the method of the present invention
- FIG. 2 is a sectional view of the internal combustion engine cylinder of FIG. 1 taken along line 2-2 of FIG.
- FIG. 3 is a pictorial view of a core member used to form the bore and various ports within the cast internal combustion engine cylinder shown in FIG. 1;
- FIG. 4 is a pictorial view of the core member shown in FIG. 3 properly located within a mold for casting an internal combustion engine cylinder;
- FIG. 5 is a schematic view showing blister forming protuberances on a core member which protuberances are formed with bosses extending radially through a cast cylinder wall into a wall of the die;
- FIG. 6 shows the blister forming protuberances of FIG. 5 after the bosses have been mechanically impacted so as to knock the protuberances from within the cylindrical wall of the cast article;
- FIG. 7 is a partial sectional view of a protuberance having a boss which is tapered to narrow toward the outer end thereof;
- FIG. 8 is a partial sectional view of a protuberance being knocked out by a punch inserted within a hole formed in the cylinder wall;
- FIG. 9 is a partial sectional view of the portion of a cylinder shown in FIG. 8 after the protuberance has been knocked out and the hole properly sealed.
- FIG. I shows a sectional view of an internal combustion engine cylinder 10 having an internal bore 12.
- the cylinder 10 may be employed in the engine for a chain saw.
- Acharge inlet port 14 is formed within the wall of the cylinder 10 near the lower portion thereof.
- An exhaust port 16 is formed within the wall of the cylinder 10 above the inlet port 14 so as to facilitate scavenging when the cylinder is used in connection with a two stroke internal combustion engine.
- By-pass or transfer ports 18 are formed as blisters within the wall of the cylinder 10. The ports 18 are positioned vertically between the inlet port 14 and exhaust port 16 and are spaced angularly therefrom. Each blister 18 may vary in configuration in accordance with the by-pass requirements of the specific engine design. Referring briefly to FIG. 2, it can be seen that the general extension of the blisters 18 along line e does not coincide with a radial r drawn to the approximate center of the blister. This offsetting angle, which may be approximately 30, is significant in that such angles are difficult to machine using current methods of manufacture.
- a generally cylindrical recess 20 is formed in the head of the cylinder which recess may be used to retain a spark plug (not shown).
- the generally spherical portion 22 defining the upper portion of the bore 12 may be used as the combustion chamber of the cylinder and may be of an irregular configuration.
- Cooling fins 24 are formed on the outer cylindrical surface of the cylinder 10 for effecting heat transfer from the combustion area 22 to the atmosphere surrounding the cylinder 10.
- a core member 30 which may be used to form the bore 12, the blisters 18, and the ports 14 and 16 of the internal combustion engine cylinder 10 shown in FIG. I.
- the core member 30 may consist of the same material as the engine cylinder 10 and may be formed with an inner cylindrical surface 32 which defines a recess for receiving a core arbor or positioner 50 of a die described hereinafter in reference to FIG. 4.
- the surface 32 may desirably be tapered.
- a radially projecting protuberance 38 is provided on the cylindrical surface of the core member 30 to form the exhaust port 16 shown in FIG. 1 and a second protuberance 40 forms the inlet port 14 shown in the same view.
- An irregular protuberance 42 is formed on the core member 30 vertically between the radial projections 38 and 40 but is angularly spaced therefrom to form the irregular blisters 18 shown in FIGS. 1 and 2. It will be noted that surface 44 of the projection 42 subtends an angle of approximately 30 with respect to a plane extending tangent to the cylindrical surface of the core 30 at a line common to the outer surface of the cylindrical core 30 and the surface 44 of the projection 42. The significance of this irregular configuration has been previously discussed with respect to FIGS. 1 and 2.
- the core member 30 shown in FIG. 3 may be die cast of a lightweight metal such as aluminum or magnesium by any conventional means. If it is desired to die cast a hollow article such as pump body of a non-metallic substance or of any die castable material, it ispreferable, although not necessary, that the core member 30 comprise the same material as the die casting material to practice the present invention. In this connection, it may be noted that the provision of a core member 30 of magnesium may be advantageously employed in making a die cast hollow article of aluminum, without utilizing any anti-adhering substance of the type which is described more fully hereinafter.
- a heat and pressure resistant anti-adhering substance is coated at least on the protuberance surfaces of the core member 30 by a clipping, plating, brushing, or spraying operation.
- the coating may comprise a substance such as a liquidized polyimide composition or a silicone oil.
- a coating of high temperature tetrafluoroethylene or hard chrome was found to be effective for the purposes of the present invention when applied to a core member 30 consisting of an aluminum alloy. The purpose of the coating is to facilitate the removal of the remaining portions of the core from the cylinder casting after machining the bore.
- Aluminum cores are currently being anodized with refractory materials in order to restrict the rate of heat transfer through the core, the cast article and the outer mold surfaces. It has been discovered, unexpectedly, that such refractory film is not satisfactorily effective to preclude fusion, welding or brazing of a cast aluminum article to an aluminum core member.
- a core member 30 consisting of aluminum or magnesium is cast and, if an anti-adhering substance is to be employed, the port forming blisters, ports and combustion chambers are sprayed, brushed or dipped with a liquidized polyimide composition which may be diluted with an appropriate solvent to comprise a solution comprising 50 percent to percent, by volume, of polyimide N-methylpyrrolidone has been found to be a suitable solvent for this purpose.
- the liquid film of the polyimide solution is then baked on the core 30 at 600 F. for 20 to 30 minutes.
- the core member 30 should be cleaned with the solvent and then dry heated before applying the polyimide composition.
- the cured coating should have a brown color and should not show any bare spots. The uniformity of the coating thickness is not critical.
- the coating step may be avoided.
- the core member 30 is positioned (after coating, if the coating step is employed) within a mold as shown in FIG. 4 and properly held in place by means of the cylindrical locator portion 50 which projects upward from the bottom of the mold cavity 52 and, itself, provides the spherical surface 53 for forming the combustion chamber 22.
- the locator portion 50 may be tapered if the surface 32 of the core is tapered.
- the combustion chamber could alternatively be formed by a surface portion of the core member 30.
- the surrounding mold 54 may comprise any conventional mold member because the tolerances on the outside surfaces of a hollow article such as an engine cylinder are not generally critical. Therefore, if the material comprising the mold member 54 should expand at a different rate than the cast material, any resulting minor distortion would be acceptable.
- molten aluminum is introduced through an inlet duct 56 into the article forming surfaces of the mold member 54.
- the aluminum is first heated to a tempera ture within a range of 1,200 to 1,225 F. and enters the cavity 52 under a pressure within a range of 13,000 to 14,000 psi.
- the overall apparatus may then be cooled for 10 to 15 seconds until the aluminum has solidified at a temperature within a range of 600 to 700 F.
- the mold 54 which may be of the segmental type, is removed by any conventional means from around the article and the core 30 retained therein.
- the major portion of the core member 30 is then machined out from the cast article.
- the projections 38, 40 and 42 remain within the walls of the hollow cast article.
- the article is then mechanically impacted by means of a soft hammer, or the like, which impaction causes the remaining portions of the core member to be loosened from within the cast article and to fall out.
- An access hole may be drilled adjacent a blister forming projection to permit the knocking out of the projection by the insertion of a tool through the hole which tool may directly contact the projection and effect the removal thereof by transmitting mechanical impactions directly thereto.
- FIG. 5 shows a core member 30 positioned within a die member 52 which core member 30 is formed with blister forming projections 42.
- the projections are formed with radially extending tapered bosses 60 which extend through the cylinder and into holes 62 formed within the casting mold 52 for retaining the bosses 60.
- FIG. 6 shows the cast cylinder after the mold 54 has been removed and after a major portion of the core member 30 has been machined out from therein.
- the step of machining a major portion of the core from the cast article may involve boring out the generally cylindrical portion of the core member and leaving only the protuberances remaining distinctly encapsulated within the wall of the cast hollow article.
- the blister forming protuberances 42 have been displaced from the blisters within the cylinders by mechanically impacting the radial ends of the bosses 60 formed thereon. Each blister forming protuberance 42 is then broken off from the associated boss 60 at a neck portion 63 of the boss 60.
- the protuberance 42 may be formed with a boss 64 having a reverse tapered to that of boss 60 shown in FIG. 6.
- the protuberance 42 may be formed without a boss as shown in F lG. 8 and a hole 65 machined in the cylinder for the insertion of a punch tool 67 for removing the protuberance 42.
- a steel ball 69 and a sealing material'71 may then be used to fill the hole 65 as shown in FIG. 9.
- an aluminum core member 30 is utilized and it is permitted to form an oxide layer, before casting an aluminum article, it has been found that this layer may function as an anti-adhering layer to prevent fusion between the core and cast article.
- the formation of an aluminum oxide layer may be encouraged by placing a heated core in an atmosphere with an excess of oxygen.
- a method of molding hollow articles comprising the stepsof:
- a core member having an outer surface for forming the inner surface of the article, the outer surface of said core member including a main body portion and at least one protuberance projecting outwardly therefrom;
- the step of providing a core member having an outer surface for forming the inner surface of the article comprises the step of casting a hollow generally cylindrical metal member forming said main body portion and having a plurality of said protuberances projecting therefrom for forming port holes and blisters within the hollow article;
- the step of machining comprises forming a hollow article with each of said protuberances being distinctly encapsulated by said hollow article; and wherein the step of mechanically impacting is performed so as to loosen each of said distinctly encapsulated protuberances.
- said core member is a magnesium core member.
- said die casting material is aluminum.
- step of mechanically impacting comprises impacting the ends of bosses projecting from said protuberances, which bosses are left within the wall of said article to plug holes formed by said bosses.
- step of providing a core member comprises providing a core member with the main body portion of its outer article forming surface being generally cylindrical and having a plurality of said protuberances projecting outwardly therefrom for forming port holes and blisters within the hollow article.
- a method of molding hollow articles comprising the steps of:
- a core member having an outer surface for forming the inner surface of the article, the outer surface of the core member being a generally cylindrical surface having protuberances projecting therefrom 'for forming port holes and blisters within the hollow article;
- a method of molding hollow articles comprising the steps of:
- a metal core member having an outer surface for forming the inner surface of the article, the outer surface of the core member being a generally cylindrical surface having protuberances projecting therefrom for forming port holes and blisters within the hollow article;
- a method for manufacturing hollow articles comprising the steps:
- step of mechanically impacting comprises impacting the end of a boss projecting from said at least one protuberance, which boss is left within the wall of said article.
- a method for manufacturing hollow articles comprising the steps of:
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00314468A US3844334A (en) | 1970-03-17 | 1972-12-12 | Method of casting cylinders |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00020202A US3847204A (en) | 1970-03-17 | 1970-03-17 | Method of casting aluminum cylinder |
US00314468A US3844334A (en) | 1970-03-17 | 1972-12-12 | Method of casting cylinders |
Publications (1)
Publication Number | Publication Date |
---|---|
US3844334A true US3844334A (en) | 1974-10-29 |
Family
ID=26693161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00314468A Expired - Lifetime US3844334A (en) | 1970-03-17 | 1972-12-12 | Method of casting cylinders |
Country Status (1)
Country | Link |
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US (1) | US3844334A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6040663A (en) * | 1983-08-11 | 1985-03-04 | Kawasaki Heavy Ind Ltd | Production of cylinder block |
EP0184771A2 (en) * | 1984-12-05 | 1986-06-18 | Industrias Mediterráneo, S.A. | Improvements in the manufacturing process for aluminium alloy die-cast cylinders |
DE3723260A1 (en) * | 1986-07-24 | 1988-01-28 | Kioritz Corp | INTERNAL MOLD FOR PRODUCING A CYLINDER |
US5372105A (en) * | 1992-10-08 | 1994-12-13 | Kioritz Corporation | Combustion chamber for two-cycle internal combustion engine |
US5471960A (en) * | 1992-10-08 | 1995-12-05 | Kioritz Corporation | Cylinder for two-cycle internal combustion engine |
DE19803866A1 (en) * | 1998-01-31 | 1999-08-05 | Volkswagen Ag | Casting mold and process for making castings |
US6345439B2 (en) * | 1998-11-10 | 2002-02-12 | Kioritz Corp. | Method for manufacturing a cylinder for internal combustion engine |
WO2002014691A1 (en) * | 2000-08-10 | 2002-02-21 | Thomas Industries Inc. | Compressor cooling system |
EP1284355A2 (en) * | 2001-08-17 | 2003-02-19 | Electrolux Home Products, Inc. | Cylinder head and crankcase manufacturing and assembly techniques |
US20030075298A1 (en) * | 2001-05-22 | 2003-04-24 | Howmet Research Corporation | Fugitive patterns for investment casting |
US20040089436A1 (en) * | 2002-09-04 | 2004-05-13 | Kioritz Corporation | Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core |
US20040250420A1 (en) * | 2003-06-11 | 2004-12-16 | Klaus-Martin Uhl | Method for making a cylinder for a two-stroke engine |
US20040261971A1 (en) * | 2003-06-25 | 2004-12-30 | Kioritz Corporation | Method for manufacturing a cylinder for internal combustion engine |
US20050133189A1 (en) * | 2003-12-22 | 2005-06-23 | Kioritz Corporation | Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core |
WO2015197051A1 (en) * | 2014-06-26 | 2015-12-30 | Ksm Castings Group Gmbh | Method for producing a core to be used for forming a cavity in a cast housing of a high-pressure pump |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1491816A (en) * | 1922-11-15 | 1924-04-29 | Doehler Die Casting Co | Method of die casting |
-
1972
- 1972-12-12 US US00314468A patent/US3844334A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1491816A (en) * | 1922-11-15 | 1924-04-29 | Doehler Die Casting Co | Method of die casting |
Non-Patent Citations (1)
Title |
---|
Die Casting for Engineers, Copyright 1953, New Jersey Zinc Co., 160 Front St., New York 38, N.Y., Scientific Library TS253N4 1953C.2 page 12. * |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6040663A (en) * | 1983-08-11 | 1985-03-04 | Kawasaki Heavy Ind Ltd | Production of cylinder block |
JPS6345897B2 (en) * | 1983-08-11 | 1988-09-12 | Kawasaki Heavy Ind Ltd | |
EP0184771A2 (en) * | 1984-12-05 | 1986-06-18 | Industrias Mediterráneo, S.A. | Improvements in the manufacturing process for aluminium alloy die-cast cylinders |
EP0184771A3 (en) * | 1984-12-05 | 1987-04-29 | Industrias Mediterráneo, S.A. | Improvements in the manufacturing process for aluminium alloy die-cast cylinders |
DE3723260A1 (en) * | 1986-07-24 | 1988-01-28 | Kioritz Corp | INTERNAL MOLD FOR PRODUCING A CYLINDER |
US5372105A (en) * | 1992-10-08 | 1994-12-13 | Kioritz Corporation | Combustion chamber for two-cycle internal combustion engine |
US5471960A (en) * | 1992-10-08 | 1995-12-05 | Kioritz Corporation | Cylinder for two-cycle internal combustion engine |
DE19803866A1 (en) * | 1998-01-31 | 1999-08-05 | Volkswagen Ag | Casting mold and process for making castings |
US6345439B2 (en) * | 1998-11-10 | 2002-02-12 | Kioritz Corp. | Method for manufacturing a cylinder for internal combustion engine |
WO2002014691A1 (en) * | 2000-08-10 | 2002-02-21 | Thomas Industries Inc. | Compressor cooling system |
US6474954B1 (en) | 2000-08-10 | 2002-11-05 | Thomas Industries Inc. | Compressor cooling system |
CN1293304C (en) * | 2000-08-10 | 2007-01-03 | 托马斯工业股份有限公司 | Compressor cooling system |
GB2427845B (en) * | 2001-05-22 | 2007-02-14 | Howmet Res Corp | Cast metallic article |
US20030075298A1 (en) * | 2001-05-22 | 2003-04-24 | Howmet Research Corporation | Fugitive patterns for investment casting |
GB2427845A (en) * | 2001-05-22 | 2007-01-10 | Howmet Res Corp | A cast metallic article |
US6986949B2 (en) * | 2001-05-22 | 2006-01-17 | Howmet Corporation | Fugitive patterns for investment casting |
US6789604B2 (en) | 2001-05-22 | 2004-09-14 | Howmet Research Corporation | Fugitive patterns for investment casting |
US6928729B2 (en) | 2001-08-17 | 2005-08-16 | Electrolux Home Products, Inc. | Cylinder head and crankcase manufacturing and assembly techniques |
US20040098860A1 (en) * | 2001-08-17 | 2004-05-27 | Alan Britt | Cylinder head and crankcase manufacturing and assembly techniques |
EP1284355A3 (en) * | 2001-08-17 | 2003-08-20 | Electrolux Home Products, Inc. | Cylinder head and crankcase manufacturing and assembly techniques |
EP1284355A2 (en) * | 2001-08-17 | 2003-02-19 | Electrolux Home Products, Inc. | Cylinder head and crankcase manufacturing and assembly techniques |
US6899158B2 (en) * | 2002-09-04 | 2005-05-31 | Kioritz Corporation | Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core |
US20040089436A1 (en) * | 2002-09-04 | 2004-05-13 | Kioritz Corporation | Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core |
US20040250420A1 (en) * | 2003-06-11 | 2004-12-16 | Klaus-Martin Uhl | Method for making a cylinder for a two-stroke engine |
US7458153B2 (en) * | 2003-06-11 | 2008-12-02 | Andreas Stihl Ag & Co. Kg | Method for making a cylinder for a two-stroke engine |
US20040261971A1 (en) * | 2003-06-25 | 2004-12-30 | Kioritz Corporation | Method for manufacturing a cylinder for internal combustion engine |
US20050133189A1 (en) * | 2003-12-22 | 2005-06-23 | Kioritz Corporation | Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core |
US7165597B2 (en) * | 2003-12-22 | 2007-01-23 | Kioritz Corporation | Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core |
WO2015197051A1 (en) * | 2014-06-26 | 2015-12-30 | Ksm Castings Group Gmbh | Method for producing a core to be used for forming a cavity in a cast housing of a high-pressure pump |
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Legal Events
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AS | Assignment |
Owner name: MCCULLOCH CORPORATION A MD CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BLACK & DECKER INC., A DE CORP.;REEL/FRAME:004134/0336 Effective date: 19830505 |
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AS | Assignment |
Owner name: CITICORP INDUSTRIAL CREDIT, INC., 450 MAMARONECK A Free format text: MORTGAGE;ASSIGNORS:MC CULLOCH CORPORATION;MC CULLOCH OVERSEAS N.V.;REEL/FRAME:004158/0190 Effective date: 19830331 Owner name: CITICORP INDUSTRIAL CREDIT, INC., NEW YORK Free format text: MORTGAGE;ASSIGNORS:MC CULLOCH CORPORATION;MC CULLOCH OVERSEAS N.V.;REEL/FRAME:004158/0190 Effective date: 19830331 |
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Owner name: FIRST UNION NATIONAL BANK OF NORTH CAROLINA ONE F Free format text: SECURITY INTEREST;ASSIGNOR:MCCULLOCH CORPORATION;REEL/FRAME:005337/0736 Effective date: 19900530 Owner name: MCCULLOCH CORPORATION, A CORP. OF MD. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP NORTH AMERICA, INC., FORMERLY KNOWN AS CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:005365/0004 Effective date: 19900530 |