FR2652526A1 - Device for manufacturing light metal pistons for internal combustion engines. - Google Patents

Device for manufacturing light metal pistons for internal combustion engines. Download PDF

Info

Publication number
FR2652526A1
FR2652526A1 FR9011790A FR9011790A FR2652526A1 FR 2652526 A1 FR2652526 A1 FR 2652526A1 FR 9011790 A FR9011790 A FR 9011790A FR 9011790 A FR9011790 A FR 9011790A FR 2652526 A1 FR2652526 A1 FR 2652526A1
Authority
FR
France
Prior art keywords
piston
molding tool
casting
region
cast
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.)
Pending
Application number
FR9011790A
Other languages
French (fr)
Inventor
Mielke Siegfried
Bordt Manfred
Schnaberich Franz
Coelingh Willem
Ottliczky Emmerich
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.)
Kolbenschmidt AG
Original Assignee
Kolbenschmidt AG
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
Priority to DE19893932562 priority Critical patent/DE3932562A1/en
Application filed by Kolbenschmidt AG filed Critical Kolbenschmidt AG
Publication of FR2652526A1 publication Critical patent/FR2652526A1/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20Accessories: Details
    • B22D17/22Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/24Accessories for locating and holding cores or inserts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/06Permanent moulds for shaped castings
    • B22C9/064Locating means for cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/0009Cylinders, pistons
    • B22D19/0027Cylinders, pistons pistons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/14Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00Other material characteristics; Treatment of material
    • F05C2253/16Fibres

Abstract

<P> a) Light metal piston manufacturing device for internal combustion engines. <BR/> b) Bearing elements (14, 15) are provided in the cavity (17) of the molding tool (5, 9, 10) for axially and axially self-supporting or radially fixed parts (12). <BR/> c) Automotive industry. </ P>

Description

1 2652526

  The invention relates to a device for manufacturing lightweight metal pistons for internal combustion engines, in particular for diesel engines, comprising in the region of the bottom of the piston of the piston skirt and / or the bosses of the piston, patches to be sealed by pressure casting, in which the melt introduced into the molding tool is brought to the

solidification under high pressure.

  In the construction of diesel engines, the current advances, such as increased ignition pressures and thermal insulation of the combustion chamber, have more than significant implications for piston technology. The load-bearing ability of the constituent materials of the pistons is increased in addition to fabrication measurements and new materials having a lower thermal conductivity are used. The die-casting process, in which the casting mold is filled with a melt under an adjustable pressure and then brought to solidification under a high pressure of more than 1000 bar, offers the possibility of necessary level the resistance of aluminum alloys, silicon and magnesium which are used, in general, for the manufacture of pistons. Die casting is a great match

2 2652526

  the manufacture of fibrous composite materials because, because of the large casting pressure, the melt can

  penetrate relatively easily into the fibrous molded body.

  The final pressure of more than 1000 bar places the melt and the fibers at an atomic distance, which can give rise to a controlled reaction which is necessary for a good bond between fibers and melt. But it has been found that inserts, to be selectively sealed in the piston, for example fibrous moldings, sand cores capable of being removed, salt or graphite foam or the like to be removed, are difficult to seal. by casting because the inserts, introduced into the impression of the molding tool, can not be put in position in a safe manner and without being damaged, so that when filling the molding tool of the melt, the patches may float or sink into the melt and / or damage

  may occur during pressurization.

  DE-C-12 50 605 and DE-C-38 07 986 disclose, of course, devices for fixing cores compressed in sand or salt to parts of cores which are intended to cast pistons of internal combustion engines, or regulating elements to be sealed by casting into the pistons. But these devices can not be used when implementing the die casting process. The present invention therefore aims at constituting a device for manufacturing lightweight metal pistons for internal combustion engines, in particular for diesel engines, with patches which must be selectively sealed there by pressure casting so that the inserts can be held in position in the molding tool, in a safe and damage-free manner and so as to eliminate any change in the radial position

and / or axial in the melt.

3 2652526

  The device according to the invention is characterized by bearing elements which are arranged in the impression of the molding tool for the setting in self-supporting position

  axially and / or radially fixed inserts.

  These bearing elements are, according to one embodiment of the invention, wire spring elements or ribbon spring elements which, according to another characteristic of the invention, are attached to the molding tool , the ends of the spring elements being advantageously introduced into corresponding recesses of the molding tool. The spring elements can also be fixed to casting elements connected to

the molding tool.

  For pistons having in regions of segments, preferably in the region of the first segment groove, an annular support of a special austenitic cast iron or of a fibrous molded body, cast-sealing and connected to the molding tool, it is advantageous to fix the inserts attached to the annular support by spring elements, for the setting self-supporting position, the ends of the spring elements being advantageously introduced into corresponding recesses of the annular support. The invention can be used in particular in light metal pistons in which a ring core made of sand, salt or foam graphite, which can be eliminated and which serves to form a casting ring, must be pour-sealed at the first groove of segments. a cavity forming

cooling channel.

  It is also possible to provide, as a bearing element, on the movable half of the molding tool, axial position holding appendices of the insert, preferably of the core used to form a cooling channel cavity, which are provided on the side of the piston head and which are in the form of pins, which prevent the

4 2652526

  insert to float in the melt or which, when using an elastic member, push back the insert in the elbows of this elastic member. In the cavities formed in the piston cast by the appendages in the form of pins, it is advantageous to provide the bores for the supply and discharge of the cooling fluid to

  the cavity forming the cooling channel.

  This measurement is particularly suitable for the manufacture of a light metal piston to be cast, preferably while the bottom of the piston is downwards and having a fibrous molded body introduced into the molding tool and forming the piston head or the piston. edge of the bowl forming the combustion chamber in the piston head, an annular support connected to the molding tool and sealing by casting in the region of the zone of the segments, preferably in the region of the first groove segments and a casting core at the first groove of segments, placed on the ring-shaped fibrous molded body, sand, salt or foam graphite to form a cavity forming a cooling channel and which can be removed from the cast piston, this core being pushed into an annular molding of

fibrous molded body.

  The invention is represented by way of example in the drawing and is explained in a more precise manner in this

following.

  Figure 1 is a side elevational view of a wire spring member (1) having two elbows (2, 3) into which a water-soluble salt core (4) is inserted as an insert; and intended to obtain the annular cavity forming a cooling channel in the piston in the region posterior to the first groove of segments. In the section of Figure 2 of a molding tool (5, 6) full of melt, the spring element or spring wire (1) is mounted with the salt core (4).

2652526

  to which it is connected so that the free ends of the elastic wire element (1) are hooked into holes in the annular support (7) special austenitic cast iron. Thanks to this, the salt core (4) is maintained without damage and in a safe manner when pouring and when the melt is pressurized

  in the impression (8) of the molding tool (5, 6).

  Figure 3 is a sectional view of a molding tool (9, 10) filled with the melt. On the bottom of the fixed mold half (9) is the fibrous molded body (11) on which the salt core (12), which can be removed and which is to be sealed by casting into the light metal piston, in the region behind the first groove of segments which is to be introduced into the annular support (16) is placed in a annular molding (13) suitably shaped and preventing any change in the radial position of the salt core (12). The nipple-shaped appendages (14, 15) formed on the upper and movable half (10) of the mold, push the salt core back onto the fibrous molded body (11) and prevent it from floating out. The recesses formed by the appendages Pins (14, 15) on the inner side of the cast piston (17) serve to provide the bores for the supply and discharge of the cooling medium to the channel-forming cavity

cooling.

6. 2652526

Claims (10)

  1. Apparatus for manufacturing lightweight metal pistons for internal combustion engines, in particular for diesel engines, comprising in the region of the bottom of the piston, the skirt of the piston and / or the bosses of the piston, inserts to seal by die-casting, wherein the melt introduced into the mold tool is brought to solidification under high pressure, characterized by bearing elements (1, 14, 15) which are arranged in the cavity (8, 17) of the molding tool (5, 6, 9, 10) for axially freestanding
  and / or radially fixed inserts (4, 12).
  2. Device according to claim 1, characterized in that the bearing elements consist of elastic elements or spring elements made of wire or ribbon, provided with bent portions (2, 3) of
  receiving the patches (4).
  3. Device according to claim 2, characterized in that the elastic elements (1) are fixed
to the molding tool (5, 6).
  4. Device according to claim 2, characterized in that the elastic elements (1) are fixed
  cast parts (7) connected to the molding tool.
  5. Device according to claim 3 or 4, characterized in that the ends of the elastic elements
T 2652526
  (1) are inserted in recesses of conjugate shapes of the molding tool (5, 6) or connected castings (7)
to the molding tool.
  6. Device according to claim 4 or 5, characterized in that, in order to manufacture a lightweight metal piston having, in the region of the zone of the segments, preferably in the region of the first segment groove, an annular support (7 ) of austenitic special cast iron or of a fibrous molded body, to be sealed by casting and molded, the inserts (4) are fixed to the annular support by self-supporting elastic members (1).
7. Device according to claim 6, characterized in that the insert (4, 12) consists of a core of sand, salt or graphite foam that can be removed from the light cast metal piston and used to constitute a cavity forming a cooling channel.
  8. Device according to one of claims 1 to
  7, characterized in that there is provided, as a support element, on the movable half (10) of the molding tool axially positioning appendages (14, 15) in the axial direction of the insert (4). 12), preferably of the core for forming a cooling channel cavity, which are provided on the side of the piston head
and which are in the form of nipples.
  9. Use of the device according to claim 8 for producing a lightweight metal piston to be cast, preferably while the bottom of the piston is downward and having a fibrous body (11) introduced into the molding tool (9, 10). ) and forming the piston head or the edge of the bowl forming the combustion chamber in the piston head, an annular support (16) connected to the casting tool and sealing by casting in the region of the segment area , preferably in the region of the first throat
8 ^ 2652526
  of segments, and a casting core (12) at the first ring groove on the ring-shaped fibrous body, of sand, salt or foam graphite, which serves to form a channel forming cavity. cooling and can be removed from the cast piston.
10. Use of the device according to claim 8, characterized in that the core (12) is pushed into an annular molding (13) of the molded body
fibrous (11).
FR9011790A 1989-09-29 1990-09-25 Device for manufacturing light metal pistons for internal combustion engines. Pending FR2652526A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893932562 DE3932562A1 (en) 1989-09-29 1989-09-29 DEVICE FOR PRODUCING LIGHT METAL PISTON FOR INTERNAL COMBUSTION ENGINES

Publications (1)

Publication Number Publication Date
FR2652526A1 true FR2652526A1 (en) 1991-04-05

Family

ID=6390491

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9011790A Pending FR2652526A1 (en) 1989-09-29 1990-09-25 Device for manufacturing light metal pistons for internal combustion engines.

Country Status (3)

Country Link
DE (1) DE3932562A1 (en)
FR (1) FR2652526A1 (en)
GB (1) GB2236497A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3212245B2 (en) * 1995-08-30 2001-09-25 マツダ株式会社 Casting method, casting apparatus and casting
JPH09151786A (en) * 1995-11-30 1997-06-10 Aisin Seiki Co Ltd Manufacture of piston for internal combustion engine
US5660156A (en) * 1996-05-16 1997-08-26 Zollner Corporation Cast piston having reinforced combustion bowl edge
DE19650930C2 (en) * 1996-12-07 2001-03-29 Kolbenschmidt Ag Pistons for internal combustion engines
DE19701085A1 (en) * 1997-01-15 1998-07-16 Kolbenschmidt Ag Casting engine piston using support ring
AT405622B (en) * 1997-03-05 1999-10-25 Tcg Unitech Ag Method for producing hybrid parts
DE19727566A1 (en) * 1997-06-28 1999-01-07 Bayerische Motoren Werke Ag Process for die casting a machine housing, in particular for internal combustion engines
DE29823552U1 (en) * 1998-03-07 1999-12-02 Federal Mogul Burscheid Gmbh Pistons for internal combustion engines
DE10011438C1 (en) * 2000-03-09 2001-07-12 Ks Kolbenschmidt Gmbh Casting mold used in production of a piston for an IC engine comprises mold halves and holders for receiving an annular support for a blank
DE10145876A1 (en) * 2001-09-18 2003-04-10 Daimler Chrysler Ag Device for producing a die-cast component with a core and an insert
JP4237576B2 (en) 2003-08-11 2009-03-11 富士重工業株式会社 Piston of internal combustion engine
DE102006045729A1 (en) * 2006-09-27 2008-04-03 Mahle International Gmbh Internal combustion engine's piston for racing motor, has piston head partially consists of fiber-reinforced connection body provided with two partial bodies, which together form circulating coolant duct and/or annular groove
DE102007020384A1 (en) * 2007-04-30 2008-11-06 Mahle International Gmbh Piston for an internal combustion engine, process for its preparation and ring carrier therefor
DE102009033402A1 (en) * 2009-07-15 2011-01-27 Lahnwerk Gmbh Mold insert for a casting core and / or a casting mold and casting core and / or casting mold with a mold insert
FR2971440B1 (en) * 2011-02-14 2014-01-24 Peugeot Citroen Automobiles Sa Tooling for molding a foundry part and a molding process
CN103492147A (en) * 2011-02-21 2014-01-01 圣杯发明(私人)有限公司 A mould assembly.
CN102489671B (en) * 2011-12-14 2014-02-19 湖南江滨机器(集团)有限责任公司 Salt core pressing mould, method for manufacturing salt core by using salt core pressing mould and manufactured salt core
CN103658545B (en) * 2013-12-25 2015-11-18 山东滨州渤海活塞股份有限公司 A kind of method of cross beam type salt core compacting tool set and manufacture salt core thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529120A1 (en) * 1982-06-25 1983-12-30 Ae Plc Pressure casting method and piston formed therefor
JPS6013955A (en) * 1983-07-04 1985-01-24 Izumi Jidosha Kogyo Kk Piston for internal-combustion engine and manufacture thereof
JPS60166158A (en) * 1984-02-07 1985-08-29 Izumi Jidosha Kogyo Kk Production of piston for internal-combustion engine
JPS60244455A (en) * 1984-05-16 1985-12-04 Mazda Motor Corp Production of piston
DE3721021A1 (en) * 1986-06-27 1988-01-21 Aisin Seiki METHOD FOR PRODUCING AN INTERNAL COMBUSTION ENGINE PISTON
DE3807986A1 (en) * 1987-03-12 1988-09-29 Aisin Seiki METHOD FOR PRODUCING AN INTERNAL COMBUSTION ENGINE PISTON

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1055737A (en) * 1964-03-25 1967-01-18 Wellworthy Ltd Improvements in casting processes
DE1250605B (en) * 1964-10-14 1967-09-21 Schmidt Gmbh Karl Means pressed for cantilever mounting of sand or salt core parts
GB1261904A (en) * 1968-06-20 1972-01-26 Aeroplane Motor Alu Cast Improvements in cast metal pistons
DE3370512D1 (en) * 1982-12-31 1987-04-30 Ae Plc Squeeze casting of pistons
GB8409044D0 (en) * 1984-04-07 1984-05-16 Gkn Technology Ltd Casting metal articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529120A1 (en) * 1982-06-25 1983-12-30 Ae Plc Pressure casting method and piston formed therefor
JPS6013955A (en) * 1983-07-04 1985-01-24 Izumi Jidosha Kogyo Kk Piston for internal-combustion engine and manufacture thereof
JPS60166158A (en) * 1984-02-07 1985-08-29 Izumi Jidosha Kogyo Kk Production of piston for internal-combustion engine
JPS60244455A (en) * 1984-05-16 1985-12-04 Mazda Motor Corp Production of piston
DE3721021A1 (en) * 1986-06-27 1988-01-21 Aisin Seiki METHOD FOR PRODUCING AN INTERNAL COMBUSTION ENGINE PISTON
DE3807986A1 (en) * 1987-03-12 1988-09-29 Aisin Seiki METHOD FOR PRODUCING AN INTERNAL COMBUSTION ENGINE PISTON

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 114 (M-473)[2171], 26 avril 1986; & JP-A-60 244 455 (MAZDA K.K.) 04-12-1985 *
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 2 (M-444)[2059], 8 janvier 1986; & JP-A-60 166 158 (IZUMI JIDOUSHIYA KOGYO K.K.) 29-08-1985 *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 132 (M-385)[1855], 7 juin 1985; & JP-A-60 013 955 (IZUMI JIDOUSHIYA KOGYO K.K.) 24-01-1985 *

Also Published As

Publication number Publication date
GB9021124D0 (en) 1990-11-14
GB2236497A (en) 1991-04-10
DE3932562A1 (en) 1991-04-11

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