EP0280675A2 - Moule pour une boîte de moteur - Google Patents

Moule pour une boîte de moteur Download PDF

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Publication number
EP0280675A2
EP0280675A2 EP88890029A EP88890029A EP0280675A2 EP 0280675 A2 EP0280675 A2 EP 0280675A2 EP 88890029 A EP88890029 A EP 88890029A EP 88890029 A EP88890029 A EP 88890029A EP 0280675 A2 EP0280675 A2 EP 0280675A2
Authority
EP
European Patent Office
Prior art keywords
core
cores
base
casting mold
water
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
Application number
EP88890029A
Other languages
German (de)
English (en)
Other versions
EP0280675A3 (en
EP0280675B1 (fr
Inventor
Peter Dipl.-Ing. Wünsche
Andreas Bilek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AVL List GmbH
Original Assignee
AVL List GmbH
AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AVL List GmbH, AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH filed Critical AVL List GmbH
Publication of EP0280675A2 publication Critical patent/EP0280675A2/fr
Publication of EP0280675A3 publication Critical patent/EP0280675A3/de
Application granted granted Critical
Publication of EP0280675B1 publication Critical patent/EP0280675B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • 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
    • 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 
    • F02F1/24—Cylinder heads

Definitions

  • the invention relates to a casting mold for a crankcase of an internal combustion engine with an outer shape resting on a base of a base core, the base core having a base portion, a crankcase portion and a main bearing portion, and with water jacket cores and cylinder bore cores.
  • Casting molds for crankcases are usually produced either with vertical or horizontal separation of the outer mold halves, with a crankcase core per cylinder, as well as other cores for oil pressure run, crankcase ventilation, water jacket, water pump etc.
  • the large number of cores increases the effort involved in assembling the core, which makes assembly more difficult, in particular by anchoring the individual cores by means of core supports, core nails or adhesive.
  • the casting tolerances are increased by the summation of the individual games between the casting cores and the effort for machining the crankcase after casting is increased.
  • a casting mold of the type mentioned is known for example from DE-PS 34 19 979.
  • This casting mold has a horizontal division of the outer shape consisting of lower box shape and upper box shape.
  • the lower box shape has the function of a basic core, which also takes on the function of the otherwise existing crankcase core.
  • a dividing line between the two mold halves runs horizontally in the outer region, namely in the plane of the base plate surface of the cylinder block. Then the dividing line follows the shape of the crank area.
  • the known casting mold also has a cylinder bore core with a top plate and a water jacket core with corresponding core anchoring.
  • the outer contour of the cylinder block has no undercuts, so that the two mold halves can be demolded in the axial direction of the cylinder block. Undercuts are also missing in the crankcase area of the cylinder block would be an obstacle to the bottom box shape to be demolded.
  • the object of the invention is to propose a mold for crankcases, which is simple in construction, allows more freedom in design, helps to reduce the effort for core assembly and machining of the crankcase, while on the other hand the casting accuracy should be increased so that thin housing wall thicknesses low casting tolerances can be achieved.
  • the base core has integrally formed cylinder bore cores, the base section, the crank chamber section and the main bearing section being combined into a single base core part to which the cylinder bore cores are connected, and in that the water jacket cores, the oil chamber cores and, if appropriate, a cover core the base core thus formed are stored.
  • the division level of the base core, on which all other cores can be built, runs through the cylinder axes. Instead of external molded parts or shell parts, you can also kick horizontally shaped bales.
  • core parts of the base core are present, which form the front and the rear face of the crankcase.
  • An advantageous embodiment of the invention provides that all water jacket cores are combined in one piece to form a water space core.
  • the water jacket cores thus form a single water space core, the division plane of which runs horizontally.
  • the assembly is also considerably simplified in comparison to individually used water jacket cores.
  • part of the water space core which consists of the individual water jacket cores, forms the water pump spiral.
  • the water space core is mounted on the cylinder bore cores of the base core by means of bridges integrally formed on the water jacket cores, the water space core being supported against the buoyancy during the casting with the water penetrations on the outer shape, possibly on the cover core.
  • the core of the water chamber therefore does not require any lateral core holes, as it is supported upwards by the water passages when it is poured upright, degassed and can also be cleaned.
  • a further development of the invention provides that there is a number of oil chamber cores which exceeds the number of cylinders by one, the division plane of which lies normal to the axis of the crankshaft.
  • four oil chamber cores are thus provided for the oil return from the cylinder or for the crankcase ventilation.
  • the casting mold can be formed with a total of only nine cores. If the upper part of the outer mold is made in two pieces, for example by two side cores each half of the lid core, only eight cores are necessary for the construction of the casting mold.
  • each oil space core penetrates the main bearing wall of the main bearing in two areas, so that two bulkheads are formed, which connect the main bearing to the side walls of the crankcase.
  • the oil chamber cores which are pushed over the base core, expose the cylinders below the water jacket.
  • the two bulkhead walls form a torsion and bending-resistant structure, which is lighter than a conventional ribbed main bearing wall due to the low accumulation of castings.
  • Oil chamber cores and water chamber cores can be designed in such a way that the crankcase is cast with a uniformly thin wall, thus largely avoiding the accumulation of castings. Lateral core bearings that have to be machined or locked later are not required.
  • the oil space cores may have extensions which laterally encompass the water jacket cores and form openings for the oil return.
  • the core arrangement according to the invention in a casting mold makes it possible to reduce the wall thickness tolerances from + 1 / -0.5 mm to + 0.7 / -0.3 mm and to provide nominal wall thicknesses of only 3.5 mm.
  • the special design of the oil chamber cores largely avoids material accumulation, especially in the area above the skin plague.
  • Cast springs only occur in small numbers and can mostly be cut in connection with the necessary machining of the crankcase. The cleaning effort is very low due to the good accessibility.
  • US Pat. No. 4,273,182 relates to a method for producing metal castings and, in particular, to a method for producing iron castings, in particular crankcases, in which the base core used for the molding process consists of a plurality of separate individual parts, such as base section, crankcase section and main bearing section, and thus from the subject matter of the invention deviates significantly.
  • the multi-part core arrangement is designed to cope with the casting pressures in such a way that it receives a destructible band via an annular outer path of the overall arrangement.
  • the tape is stretched over the core assembly by a tape sealing machine to form a positive form mechanical security.
  • the tape is preferably located in the same plane as the outer surface of core prints when mounted.
  • the core assembly braced by a tape is attached in any direction in a glued sand mold and molten metal is introduced into this mold.
  • the molten metal heats the mold and core surfaces as well as the surrounding sand body to such an extent that the band evaporates after the molten metal is poured in.
  • the demolding process disclosed in this patent also results from this.
  • AT-PS 320 181 describes a fairly complex mold for casting the housing of water-cooled in-line engines without a cooling water space between molded cylinder liners with a complicated mold core which gives the rest of the cooling water space.
  • the object of this AT-PS is based on the task of improving the casting mold in such a way that the casting of the motor housing in question is made possible and laborious reworking is avoided.
  • the above object is achieved in that the motor housing is molded with vertical cylinder axes, but the standing mandrel for the cooling water chamber has lateral approaches, which are held in the outer molded parts, preferably glued.
  • This known arrangement thus also deviates considerably from the subject of the invention because the mandrel has to be designed in several parts in a complex manner because of the mounting of the side lugs.
  • FIG. 1 shows a section through the casting mold according to the invention along the line II in FIG. 2, FIG. 2 and FIG. 3 each show a section along the line II-II or III-III in FIG. 1, wherein the side cores and the lid core have been removed
  • FIG. 4 shows a top view of the casting mold
  • FIGS. 5 and 6 sections through a crankcase formed with the casting mold according to FIGS. 1 to 4 in a representation corresponding to FIGS. 1 and 2 7 shows a top view
  • FIG. 8 shows a bottom view of the crankcase.
  • the casting mold for a three-cylinder internal combustion engine shown in FIGS. 1 to 4 has a base core 1 which is connected to the crankcase core 2 and the three cylinder bore cores 3 is made in one piece, the division plane E of the base core 1 coinciding with the cylinder axes.
  • the base core 1 has core parts 4 and 5, which form the front 6 and the rear end face 7 of the crankcase 8.
  • the main warehouse 9 and the warehouse lane 10 are also formed by the base core 1.
  • the two outer molded and jacket parts are not shown.
  • the lid core 11 can only be seen in FIG. 1. It is of course also possible within the scope of the invention to pull the outer molded parts up to the central plane E, so that the lid core is formed half by the two outer molded parts.
  • the water jacket cores 12 are combined in one piece to form a water chamber core 13 which, as can be seen in particular from FIGS. 2 to 4, is supported on the base core 1 by means of bridges 14 integrally formed on the water jacket cores 12 in the region of the cylinder bore cores 3.
  • a part 15 of the water space core 13 forms the water point spiral 16, which is shown in FIG. 4.
  • the water space core 13 does not require any further core anchoring, since it is supported against the ferrostatic buoyancy during casting via the water passages 17 on the cover core 11, or possibly on the outer molded parts.
  • the base core 1 Also directly on the base core 1 are four oil chamber cores 18 (or five in four-cylinder internal combustion engines), the structure of which can be seen in detail, in particular from FIG. 3.
  • the oil chamber cores 18 expose the cylinders 19 below the water jackets formed by the water chamber core 13 and penetrate the main bearing wall 20 in the areas 21, so that on both sides of the main bearing 9 two bulkheads 22 are formed, which form the main bearing 9 with the side walls 23 and 24 of the crankcase 8 connect.
  • Each oil chamber core 18, the division plane 25 of which is normal to the axis 26 of the crankshaft, has two extensions 27 which laterally surround the water jacket core 12 in the region between the cylinder bore cores 3 and form openings 28 for the oil return from the cylinder head.
  • the starter flange 29 is integrated in the rear face 7, the Oil pan flange 30 is approximately at the level of the axis 26 of the crankshaft.
  • the water pump spiral 16 is cast directly onto the crankcase 8.
  • a sheet metal tube 31 can be pressed in for the suction-side cooling water hose, which tube also partially covers the water pump impeller (not shown).
  • the top view shows the eight openings 28 for the oil return from the cylinder head, as well as the six water passages 17 of the water jackets on the top of the crankcase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP88890029A 1987-02-25 1988-02-09 Moule pour une boîte de moteur Expired - Lifetime EP0280675B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT418/87 1987-02-25
AT0041887A AT387164B (de) 1987-02-25 1987-02-25 Giessform fuer ein kurbelgehaeuse

Publications (3)

Publication Number Publication Date
EP0280675A2 true EP0280675A2 (fr) 1988-08-31
EP0280675A3 EP0280675A3 (en) 1989-02-22
EP0280675B1 EP0280675B1 (fr) 1990-11-22

Family

ID=3490103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88890029A Expired - Lifetime EP0280675B1 (fr) 1987-02-25 1988-02-09 Moule pour une boîte de moteur

Country Status (4)

Country Link
EP (1) EP0280675B1 (fr)
KR (1) KR910006549B1 (fr)
AT (1) AT387164B (fr)
DE (1) DE3861100D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0486463A3 (en) * 1990-11-16 1993-03-24 Avl Gesellschaft Fuer Verbrennungskraftmaschinen Und Messtechnik Mbh.Prof.Dr.Dr.H.C. Hans List Casting mold for cylinder block of a v-type internal combustion engine
EP1147836A3 (fr) * 2000-04-19 2001-12-19 VAW mandl & berger GmbH Moule comprenant pièces de forme extérieure ansi que noyaux en sable disposés dans celles-ci
WO2004033128A3 (fr) * 2002-10-02 2005-09-09 Bruehl Eisenwerk Systeme de noyau pour produire un carter de vilebrequin de cylindre a zone de refroidissement par eau separee
CN112566739A (zh) * 2018-11-09 2021-03-26 宝马股份公司 用于制造曲轴箱的锭模和方法
CN114850446A (zh) * 2022-04-11 2022-08-05 中国第一汽车股份有限公司 一种提高v型铝合金铸套缸体缸套位置度与贴合度工艺
DE102023125649B3 (de) 2023-09-21 2025-02-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kernpaket und Zylinderkopf

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118403C2 (de) * 1991-06-05 1999-09-23 Deutz Ag Gehäuse
DE4324609C2 (de) * 1993-07-22 1997-10-16 Avl Verbrennungskraft Messtech Kurbelgehäuse für Brennkraftmaschinen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT320181B (de) * 1972-11-09 1975-01-27 Steyr Daimler Puch Ag Form zum Gießen des Gehäuses wassergekühlter Reihenmotoren
US4273182A (en) * 1979-12-07 1981-06-16 Ford Motor Company Core assembly and the method of making and using such assembly
DE3200193A1 (de) * 1982-01-07 1983-07-14 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur herstellung eines hohlen giessereikerns
JPS58184040A (ja) * 1982-04-22 1983-10-27 Nissan Motor Co Ltd 内燃機関のシリンダブロツク用中子及びその造型方法
DE3419979C2 (de) * 1984-05-29 1986-04-17 Fritz Winter, Eisengießerei oHG, 3570 Stadtallendorf Gießform für Zylinderblöcke von Verbrennungsmotoren

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0486463A3 (en) * 1990-11-16 1993-03-24 Avl Gesellschaft Fuer Verbrennungskraftmaschinen Und Messtechnik Mbh.Prof.Dr.Dr.H.C. Hans List Casting mold for cylinder block of a v-type internal combustion engine
EP1147836A3 (fr) * 2000-04-19 2001-12-19 VAW mandl & berger GmbH Moule comprenant pièces de forme extérieure ansi que noyaux en sable disposés dans celles-ci
US6662857B2 (en) 2000-04-19 2003-12-16 Vaw Mandl & Berger Gmbh Mold comprising outer mold parts and molding material cores inserted into same
CZ303141B6 (cs) * 2000-04-19 2012-05-02 Vaw Mandl & Berger Gmbh Odlévací forma, obsahující vnejší cásti formy, a zpusob odlévání taveniny
WO2004033128A3 (fr) * 2002-10-02 2005-09-09 Bruehl Eisenwerk Systeme de noyau pour produire un carter de vilebrequin de cylindre a zone de refroidissement par eau separee
CN112566739A (zh) * 2018-11-09 2021-03-26 宝马股份公司 用于制造曲轴箱的锭模和方法
CN114850446A (zh) * 2022-04-11 2022-08-05 中国第一汽车股份有限公司 一种提高v型铝合金铸套缸体缸套位置度与贴合度工艺
DE102023125649B3 (de) 2023-09-21 2025-02-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kernpaket und Zylinderkopf

Also Published As

Publication number Publication date
EP0280675A3 (en) 1989-02-22
EP0280675B1 (fr) 1990-11-22
ATA41887A (de) 1988-05-15
KR910006549B1 (ko) 1991-08-28
AT387164B (de) 1988-12-12
DE3861100D1 (de) 1991-01-03
KR880009714A (ko) 1988-10-04

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