FR2652526A1 - Device for manufacturing light metal pistons for internal combustion engines. - Google Patents
Device for manufacturing light metal pistons for internal combustion engines. Download PDFInfo
- 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
Links
- 229910052751 metals Inorganic materials 0.000 title claims abstract description 11
- 239000002184 metals Substances 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000002485 combustion reactions Methods 0.000 title claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims description 15
- 239000000155 melts Substances 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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- 238000009413 insulation Methods 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound 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[Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000005259 measurements Methods 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/24—Accessories for locating and holding cores or inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/064—Locating means for cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0009—Cylinders, pistons
- B22D19/0027—Cylinders, pistons pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/16—Fibres
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).
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)
| 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)
| 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)
| 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 |
-
1989
- 1989-09-29 DE DE19893932562 patent/DE3932562A1/en not_active Withdrawn
-
1990
- 1990-09-25 FR FR9011790A patent/FR2652526A1/en active Pending
- 1990-09-28 GB GB9021124A patent/GB2236497A/en not_active Withdrawn
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| 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 |
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| 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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