EP0635318A1 - Extrusion method - Google Patents
Extrusion method Download PDFInfo
- Publication number
- EP0635318A1 EP0635318A1 EP94810389A EP94810389A EP0635318A1 EP 0635318 A1 EP0635318 A1 EP 0635318A1 EP 94810389 A EP94810389 A EP 94810389A EP 94810389 A EP94810389 A EP 94810389A EP 0635318 A1 EP0635318 A1 EP 0635318A1
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- EP
- European Patent Office
- Prior art keywords
- extrusion
- hollow
- hollow profiles
- profile
- profiles
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/151—Making tubes with multiple passages
Definitions
- the present invention relates to a method for producing hollow profiles and the application of the method.
- hollow profiles or tubes can have one or more hollow chambers.
- materials suitable for extrusion is limited. For example, aluminum in a purity of 99 to 99.9% by weight and alloys of the types AlMgSi 0.5, AlMg1, AlCuMg1 are e.g. especially suitable for processing in extrusion processes.
- the object of the present invention is to provide a process for the production of low-porosity hollow profiles from high-silicon aluminum alloys, which makes it possible to produce such hollow profiles in a simple, quick and inexpensive manner in one operation.
- an aluminum alloy containing more than 10% by weight of Si is extruded into hollow profiles containing at least one cylindrical running surface by extrusion at pressures of 1000 to 10,000 t.
- Such hollow profiles can be, for example, shaped pipes, such as simple shaped pipes or shaped pipes with external profiling. However, preference is given to hollow profiles having at least two chambers in the form of at least two connected molded tubes which are coaxially lined up or else three or more connected molded tubes which are lined up offset from one another. These hollow profiles can also have an outer profile.
- the hollow profile can contain, for example, at least two and expediently two to eight, preferably two to six and in particular four cylindrical treads in the form of joined, connected molded tubes.
- Typical wall thicknesses of the shaped tubes can be, for example, 5 mm to 15 mm, expediently 7 to 13 mm and preferably 8 to 12 mm.
- the material thickness can be 5 to 30 mm, expediently 7 to 26 mm and preferably 8 to 24 mm.
- the diameters of the hollow chambers can be, for example, 4 to 12 cm, expediently 6 to 10 cm and preferably 6 to 8 cm.
- the cross-sectional area of the material i.e. the aluminum alloy, at least 15 cm2 per pipe, respectively. cylindrical tread.
- the hollow profile produced according to the invention has, for example, two to six cylindrical running surfaces in the form of connected molded tubes which, as an extruded body, form a multi-chamber hollow profile, the cross-sectional area of the material, i.e. the aluminum alloy, for example, 30 cm2 to 240 cm2.
- the four chambers respectively. have four cylindrical treads.
- the cross-sectional area of the material of the hollow profile can be, for example, 75 to 120 cm2.
- the cross-section of the cylindrical running surfaces is preferably round or approximately round, i.e. slightly oval.
- An aluminum alloy containing more than 10% by weight of Si is used as the material or material for pressing into hollow profiles, aluminum alloys containing 12 to 22% by weight of silicon being expedient and aluminum alloys containing 16 to 18% by weight of silicon being preferred.
- aluminum alloys containing high silicon and in particular eutectic and hypereutectic silicon alloys are preferred.
- Aluminum alloys in which the silicon particle size is smaller than 200 ⁇ m and in particular 5 to 80 ⁇ m are likewise preferred.
- Aluminum alloys which contain only traces of copper or copper only as accompanying impurities or a copper content of 0.001 to 1.5% by weight are preferred.
- the method according to the invention is carried out in such a way that the alloy is produced and, as a rule, cast in the form of an ingot and, if appropriate, annealed.
- the cast ingot can then be split into press studs and the press studs can be twisted off if necessary.
- the direct extrusion process, the indirect extrusion process or a related extrusion process can be used as the extrusion process, the direct extrusion process using a chamber or bridge tool being preferred.
- the extrusion process can be carried out with a profile speed of e.g. 0.5 to 12 m / min, expediently from 1 to 7 m / min and preferably at 1.5 to 5 m / min.
- the temperature of the press billets during extrusion can be, for example, 300 to 500 ° C. and expediently 380 to 480 ° C.
- the pressures are 1000 to 10,000 tons and preferably 3000 to 8000 tons, with specific pressures of 30 to 350 kg / cm2 expedient and 80 to 280 kg / cm2 are advantageous.
- the hollow profiles can be quenched, solution-annealed, stretched, sawn, straightened, and cold or warm aged if necessary.
- the method according to the invention can advantageously be used for the extrusion of hollow profiles such as cylinder liners.
- the hollow profiles can e.g. as cylinder liners with at least one cylinder running surface, expediently two to eight, advantageously two to six and in particular four cylinder running surfaces are used in piston engines, such as internal combustion engines with internal or external ignition, piston compressors, steam engines, piston pumps, etc.
- piston engines such as internal combustion engines with internal or external ignition, piston compressors, steam engines, piston pumps, etc.
- the hollow profiles can be subjected to further machining processes.
- the cylinder liners of cylinder liners can be machined by mechanical and / or chemical methods.
- the cylinder liners can be turned, ground, lapped or honed, or the cylinder liners can be exposed to a chemical process in which the surface aluminum layer is removed by a few ⁇ m and the silicon crystals in the surface area are partially exposed.
- the hollow profiles can then be used, for example, as so-called wet cylinder liners in internal combustion engines.
- the hollow profiles are preferably used for the production of cylinder blocks, the hollow profile representing an integrated part of the cylinder block.
- the cylinder block is produced by gravity casting or by die casting, whereby the hollow profile is cast around and embedded in the cast metal, generally or partially, along the outer side walls.
- the result is a cylinder block as a casting, the hollow profile produced according to the invention forming the dry cylinder liners cast in the casting.
- the cast metal forming the further part of the cylinder block is, for example, of the same or similar composition as the corresponding hollow profile.
- Figure 1 shows the top view of a molded body, which as a cylinder liner part e.g. can be used in the mold for a cylinder block.
- a cylinder liner part e.g. can be used in the mold for a cylinder block.
- the walls of the multi-chamber hollow profile are shown.
- the individual chambers, resp. Cylinder liners are connected by webs that are created during extrusion.
- FIG. 2 shows the top view of a shaped body according to FIG. 1, the shaped tubes having an outer profile.
- Figure 3 shows a plan view of a molded body, the individual chambers, respectively. Cylinder liners, not lined up in a straight line, but offset against each other on two transverse axes.
- the method according to the invention has the advantage that no porosity can be recognized visually on the hollow profiles, even with the aid of optical devices.
Abstract
Description
Vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Hohlprofilen und die Anwendung des Verfahrens.The present invention relates to a method for producing hollow profiles and the application of the method.
Es ist bekannt, Hohlprofile oder Rohre durch Strangpressen herzustellen. Solche Hohlprofile können eine oder mehrere Hohlkammern aufweisen. In der Auswahl der für das Strangpressen geeigneten Werkstoffe ist man jedoch begrenzt. Beispielsweise Aluminium in einer Reinheit von 99 bis 99,9 Gew.-% und Legierungen der Typen AlMgSi 0,5, AlMg1, AlCuMg1 sind dabei z.B. besonders für die Verarbeitung in Strangpressverfahren geeignet.It is known to produce hollow profiles or tubes by extrusion. Such hollow profiles can have one or more hollow chambers. However, the choice of materials suitable for extrusion is limited. For example, aluminum in a purity of 99 to 99.9% by weight and alloys of the types AlMgSi 0.5, AlMg1, AlCuMg1 are e.g. especially suitable for processing in extrusion processes.
In der Praxis besteht das Bedürfnis, aus hochfesten und insbesondere hochsiliziumhaltigen Aluminiumlegierungen Formkörper zur Verfügung zu haben, wobei diese Formkörper auch grosse Querschnittsflächen bezüglich des Materials aufweisen. Solche Formkörper wurden bis anhin insbesondere durch Giessen hergestellt.In practice there is a need to have moldings made of high-strength and in particular high-silicon aluminum alloys available, these moldings also having large cross-sectional areas with regard to the material. Until now, such moldings have been produced in particular by casting.
Aufgabe vorliegender Erfindung ist es, ein Verfahren zur Herstellung von Hohlprofilen niedriger Porosität aus hochsiliciumhaltigen Aluminiumlegierungen zur Verfügung zu stellen, das es ermöglicht, solche Hohlprofile auf einfache, schnelle und kostengünstige Weise in einem Arbeitsgang herzustellen.The object of the present invention is to provide a process for the production of low-porosity hollow profiles from high-silicon aluminum alloys, which makes it possible to produce such hollow profiles in a simple, quick and inexpensive manner in one operation.
Erfindungsgemäss wird dies dadurch erreicht, dass eine Aluminiumlegierung, enthaltend mehr als 10 Gew.-% Si durch Strangpressen bei Drücken von 1000 bis 10'000 t zu Hohlprofilen, enthaltend wenigstens eine zylindrische Lauffläche, verarbeitet wird.According to the invention, this is achieved in that an aluminum alloy containing more than 10% by weight of Si is extruded into hollow profiles containing at least one cylindrical running surface by extrusion at pressures of 1000 to 10,000 t.
Solche Hohlprofile können beispielsweise Formrohre, wie einfache Formrohre oder Formrohre mit Aussenprofilierung sein. Bevorzugt sind jedoch Hohlprofile mit wenigstens zwei Kammern in der Form von wenigstens zwei coaxial aneinandergereihten, verbundenen Formrohren oder auch von drei oder mehr gegeneinander versetzt aneinandergereihten, verbundenen Formrohren. Diese Hohlprofile können ebenfalls eine Aussenprofilierung aufweisen.Such hollow profiles can be, for example, shaped pipes, such as simple shaped pipes or shaped pipes with external profiling. However, preference is given to hollow profiles having at least two chambers in the form of at least two connected molded tubes which are coaxially lined up or else three or more connected molded tubes which are lined up offset from one another. These hollow profiles can also have an outer profile.
Demnach kann das Hohlprofil beispielsweise wenigstens zwei und zweckmässig zwei bis acht, bevorzugt zwei bis sechs und insbesondere vier zylindrische Laufflächen in Gestalt von aneinandergereihten, verbundenen Formrohren enthalten.Accordingly, the hollow profile can contain, for example, at least two and expediently two to eight, preferably two to six and in particular four cylindrical treads in the form of joined, connected molded tubes.
Typische Wandstärken der Formrohre können beispielsweise 5 mm bis 15 mm, zweckmässig 7 bis 13 mm und bevorzugt 8 bis 12 mm sein. An den Zwischenstegen zwischen den Formrohrteilen kann die Materialstärke von 5 bis 30 mm, zweckmässig 7 bis 26 mm und bevorzugt 8 bis 24 mm betragen. Die Durchmesser der Hohlkammern können beispielsweise 4 bis 12 cm, zweckmässig 6 bis 10 cm und vorzugsweise 6 bis 8 cm betragen.Typical wall thicknesses of the shaped tubes can be, for example, 5 mm to 15 mm, expediently 7 to 13 mm and preferably 8 to 12 mm. At the intermediate webs between the molded tube parts, the material thickness can be 5 to 30 mm, expediently 7 to 26 mm and preferably 8 to 24 mm. The diameters of the hollow chambers can be, for example, 4 to 12 cm, expediently 6 to 10 cm and preferably 6 to 8 cm.
Bei typischen Hohlprofilen, die nach dem Verfahren gemäss vorliegender Erfindung hergestellt werden können, kann die Querschnittsfläche des Materials, d.h. der Aluminiumlegierung, wenigstens 15 cm² pro Formrohr, resp. zylindrische Lauffläche, betragen.For typical hollow profiles that can be produced by the method according to the present invention, the cross-sectional area of the material, i.e. the aluminum alloy, at least 15 cm² per pipe, respectively. cylindrical tread.
Weist das erfindungsgemäss hergestellte Hohlprofil beispielsweise zwei bis sechs zylindrische Laufflächen in Gestalt von verbundenen Formrohren auf, welche als Strangpresskörper ein Mehrkammerhohlprofil bilden, so kann die Querschnittsfläche des Materials, d.h. der Aluminiumlegierung, beispielsweise 30 cm² bis 240 cm² betragen.If the hollow profile produced according to the invention has, for example, two to six cylindrical running surfaces in the form of connected molded tubes which, as an extruded body, form a multi-chamber hollow profile, the cross-sectional area of the material, i.e. the aluminum alloy, for example, 30 cm² to 240 cm².
Besonders bevorzugt ist ein Verfahren zur Herstellung von Hohlprofilen und insbesondere Mehrkammerhohlprofilen, die vier Kammern, resp. vier zylindrische Laufflächen, aufweisen. Die Querschnittfläche des Materials des Hohlprofils kann beispielsweise 75 bis 120 cm² betragen.Particularly preferred is a method for producing hollow profiles and in particular multi-chamber hollow profiles, the four chambers, respectively. have four cylindrical treads. The cross-sectional area of the material of the hollow profile can be, for example, 75 to 120 cm².
Die zylindrischen Laufflächen sind in ihrem Querschnitt bevorzugt rund oder annähernd rund, d.h. leicht oval.The cross-section of the cylindrical running surfaces is preferably round or approximately round, i.e. slightly oval.
Als Material oder Werkstoff zur Verpressung zu Hohlprofilen wird eine Aluminiumlegierung enthaltend mehr als 10 Gew.-% Si angewendet, wobei Aluminiumlegierungen enthaltend 12 bis 22 Gew.-% Silicium zweckmässig und Aluminiumlegierungen enthaltend 16 bis 18 Gew.-% Silicium bevorzugt sind.An aluminum alloy containing more than 10% by weight of Si is used as the material or material for pressing into hollow profiles, aluminum alloys containing 12 to 22% by weight of silicon being expedient and aluminum alloys containing 16 to 18% by weight of silicon being preferred.
Bevorzugt sind demnach hochsiliciumhaltige Aluminiumlegierungen und insbesondere eutektische und übereutektische Siliciumlegierungen.Accordingly, aluminum alloys containing high silicon and in particular eutectic and hypereutectic silicon alloys are preferred.
Zu den bevorzugten Aluminiumlegierungen können beispielhaft folgende Typen genannt werden:The following types of the preferred aluminum alloys can be mentioned by way of example:
AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19, AlFeMgCuSi15-19.AlSi12, AlSi18, AlSi16, AlCuMgSi15-19, AlMgCuSi15-19, AlFeMgCuSi15-19.
Ebenfalls bevorzugt sind Aluminiumlegierungen in denen die Siliciumpartikelgrösse kleiner als 200 µm und insbesondere 5 bis 80 µm gross sind.Aluminum alloys in which the silicon particle size is smaller than 200 μm and in particular 5 to 80 μm are likewise preferred.
Bevorzugt werden Aluminiumlegierungen, die nur Spuren von Kupfer oder Kupfer nur als begleitende Verunreinigung oder einen Kupferanteil von 0,001 bis 1,5 Gew.-% enthalten.Aluminum alloys which contain only traces of copper or copper only as accompanying impurities or a copper content of 0.001 to 1.5% by weight are preferred.
Das erfindungsgemässe Verfahren wird derart ausgeführt, dass die Legierung hergestellt und in der Regel in die Form eines Barrens gegossen und gegegenenfalls geglüht wird.The method according to the invention is carried out in such a way that the alloy is produced and, as a rule, cast in the form of an ingot and, if appropriate, annealed.
Der Gussbarren kann dann in Pressbolzen aufgeteilt werden, und die Pressbolzen können falls erforderlich abgedreht werden.The cast ingot can then be split into press studs and the press studs can be twisted off if necessary.
Als Strangpressverfahren kann das direkte Strangpressen, das indirekte Strangpressen oder ein verwandtes Strangpressverfahren angewendet werden, wobei das direkte Strangpressen mit einem Kammer- oder Brückenwerkzeug bevorzugt ist.The direct extrusion process, the indirect extrusion process or a related extrusion process can be used as the extrusion process, the direct extrusion process using a chamber or bridge tool being preferred.
Das Strangpressverfahren kann mit einer Profilgeschwindigkeit von z.B. 0,5 bis 12 m/min, zweckmässig von 1 bis 7 m/min und vorzugsweise mit 1,5 bis 5 m/min durchgeführt werden.The extrusion process can be carried out with a profile speed of e.g. 0.5 to 12 m / min, expediently from 1 to 7 m / min and preferably at 1.5 to 5 m / min.
Die Temperatur der Pressbolzen während des Strangpressens kann beispielsweise bei 300 bis 500°C und zweckmässig bei 380 bis 480°C liegen.The temperature of the press billets during extrusion can be, for example, 300 to 500 ° C. and expediently 380 to 480 ° C.
Die Pressdrücke liegen bei 1000 bis 10'000 Tonnen und bevorzugt bei 3000 bis 8000 Tonnen, wobei spezifische Pressdrücke von 30 bis 350 kg/cm2 zweckmässig und 80 bis 280 kg/cm² vorteilhaft sind.The pressures are 1000 to 10,000 tons and preferably 3000 to 8000 tons, with specific pressures of 30 to 350 kg / cm2 expedient and 80 to 280 kg / cm² are advantageous.
Nach dem Strangpressverfahren können die Hohlprofile, falls erforderlich, abgeschreckt, lösungsglühungsbehandelt, gereckt, gesägt, gerichtet und kalt bzw. warm ausgelagert werden.After the extrusion process, the hollow profiles can be quenched, solution-annealed, stretched, sawn, straightened, and cold or warm aged if necessary.
Das erfindungsgemässe Verfahren kann vorteilhaft zum Strangpressen von Hohlprofilen wie Zylinderlaufbuchsen angewendet werden.The method according to the invention can advantageously be used for the extrusion of hollow profiles such as cylinder liners.
Die Hohlprofile können z.B. als Zylinderlaufbuchsen mit wenigstens einer Zylinderlauffläche, zweckmässig zwei bis acht, vorteilhaft zwei bis sechs und insbesondere vier Zylinderlaufflächen in Kolbenmaschinen, wie Verbrennungsmotoren mit Eigen- oder Fremdzündung, Kolbenkompressoren, Dampfmaschinen, Kolbenpumpen usw. eingesetzt werden.The hollow profiles can e.g. as cylinder liners with at least one cylinder running surface, expediently two to eight, advantageously two to six and in particular four cylinder running surfaces are used in piston engines, such as internal combustion engines with internal or external ignition, piston compressors, steam engines, piston pumps, etc.
Falls erforderlich können die Hohlprofile weiteren Bearbeitungsverfahren ausgesetzt werden. Beispielsweise können die Zylinderlaufflächen von Zylinderlaufbuchsen durch mechanische und/oder chemische Verfahren bearbeitet werden. Beispielsweise können die Zylinderlaufbuchsen ausgedreht, geschliffen, geläppt oder gehont werden oder die Zylinderlaufflächen können einem chemischen Prozess ausgesetzt werden, in dem die oberflächliche Aluminiumschicht um einige µm entfernt und die im Oberflächenbereich befindlichen Siliciumkristalle teilweise freigelegt werden.If necessary, the hollow profiles can be subjected to further machining processes. For example, the cylinder liners of cylinder liners can be machined by mechanical and / or chemical methods. For example, the cylinder liners can be turned, ground, lapped or honed, or the cylinder liners can be exposed to a chemical process in which the surface aluminum layer is removed by a few µm and the silicon crystals in the surface area are partially exposed.
Die Hohlprofile können dann beispielsweise als sogenannte nasse Zylinderbuchsen in Verbrennungsmotoren eingesetzt werden. Bevorzugt werden die Hohlprofile zur Herstellung von Zylinderblöcken eingesetzt, wobei das Hohlprofil einen integrierten Teil des Zylinderblockes darstellt. Der Zylinderblock wird durch Giessen mit Schwerkraft oder durch Druckguss hergestellt, wobei das Hohlprofil umgossen und im Gussmetall, in der Regel entlang den äusseren Seitenwänden ganz oder teilweise, eingebettet wird. Es entsteht dabei ein Zylinderblock als Gussstück, wobei das erfindungsgemäss hergestellte Hohlprofil die im Gusstück eingegossenen trockenen Zylinderlaufbuchsen bildet. Das den weiteren Teil des Zylinderblockes bildende Gussmetall ist beispielsweise von gleicher oder ähnlicher Zusammensetzung wie das entsprechende Hohlprofil.The hollow profiles can then be used, for example, as so-called wet cylinder liners in internal combustion engines. The hollow profiles are preferably used for the production of cylinder blocks, the hollow profile representing an integrated part of the cylinder block. The cylinder block is produced by gravity casting or by die casting, whereby the hollow profile is cast around and embedded in the cast metal, generally or partially, along the outer side walls. The result is a cylinder block as a casting, the hollow profile produced according to the invention forming the dry cylinder liners cast in the casting. The cast metal forming the further part of the cylinder block is, for example, of the same or similar composition as the corresponding hollow profile.
Anhand der Figuren 1 bis 3 werden verschiedene Ausführungsformen von erfindungsgemäss hergestellten Strangpressprofilen in der Draufsicht beschrieben.Various embodiments of extruded profiles produced according to the invention are described in plan view with reference to FIGS. 1 to 3.
Figur 1 zeigt die Draufsicht auf einen Formkörper, welcher als Zylinderlaufbuchsenteil z.B. in die Gussform für einen Zylinderblock eingesetzt werden kann. Dargestellt sind die Wände des Mehrkammerhohlprofils. Die einzelnen Kammern, resp. Zylinderlaufbuchsen, sind durch Stege, die während dem Strangpressen angelegt werden, verbunden.Figure 1 shows the top view of a molded body, which as a cylinder liner part e.g. can be used in the mold for a cylinder block. The walls of the multi-chamber hollow profile are shown. The individual chambers, resp. Cylinder liners are connected by webs that are created during extrusion.
Figur 2 zeigt die Draufsicht auf einen Formkörper gemäss Figur 1, wobei die Formrohre eine Aussenprofilierung aufweisen.FIG. 2 shows the top view of a shaped body according to FIG. 1, the shaped tubes having an outer profile.
Figur 3 zeigt die Draufsicht auf einen Formkörper, wobei die einzelnen Kammern, resp. Zylinderlaufbuchsen, nicht in gerader Linie aneinander gereiht, sondern gegeneinander versetzt auf zwei Querachsen liegend angeordnet sind.Figure 3 shows a plan view of a molded body, the individual chambers, respectively. Cylinder liners, not lined up in a straight line, but offset against each other on two transverse axes.
Das erfindungsgemässe Verfahren hat den Vorteil, dass an den Hohlprofilen visuell, auch bei einer Zuhilfenahme von optischen Geräten, keine Porosität erkennbar ist.The method according to the invention has the advantage that no porosity can be recognized visually on the hollow profiles, even with the aid of optical devices.
Claims (9)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2213/93 | 1993-07-22 | ||
| CH221393 | 1993-07-22 | ||
| CH2251/93 | 1993-07-26 | ||
| CH225193 | 1993-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0635318A1 true EP0635318A1 (en) | 1995-01-25 |
| EP0635318B1 EP0635318B1 (en) | 1999-04-21 |
Family
ID=25689808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19940810389 Revoked EP0635318B1 (en) | 1993-07-22 | 1994-06-30 | Extrusion method |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0635318B1 (en) |
| DE (1) | DE59408129D1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19532244A1 (en) * | 1995-09-01 | 1997-03-06 | Peak Werkstoff Gmbh | Process for the production of thin tubes (I) |
| DE19532252A1 (en) * | 1995-09-01 | 1997-03-06 | Peak Werkstoff Gmbh | Process for the production of thin tubes (III) |
| DE19532253A1 (en) * | 1995-09-01 | 1997-03-06 | Peak Werkstoff Gmbh | Process for the production of thin tubes (II) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3404967A (en) * | 1965-06-24 | 1968-10-08 | Anaconda American Brass Co | Two-hole extrusion |
| FR2344358A2 (en) * | 1976-03-19 | 1977-10-14 | Pechiney Aluminium | NEW BLANKETS FOR IMPACT SPINNING |
| US4313327A (en) * | 1979-12-31 | 1982-02-02 | Peerless Of America, Inc. | Extrusion die for forming multi-passage tubular members |
| JPS61190051A (en) * | 1985-02-20 | 1986-08-23 | Sumitomo Light Metal Ind Ltd | Manufacture of al type hollow section having low coefficient of linear expansion |
| JPS6283453A (en) * | 1985-10-07 | 1987-04-16 | Sumitomo Alum Smelt Co Ltd | Manufacture of aluminum alloy ingot for extrusion |
| JPH0323011A (en) * | 1989-06-20 | 1991-01-31 | Kobe Steel Ltd | Manufacture of hollow extruded stock of al-si type alloy |
| JPH03126802A (en) * | 1989-10-09 | 1991-05-30 | Kobe Steel Ltd | Manufacture of hollow extruded material |
-
1994
- 1994-06-30 EP EP19940810389 patent/EP0635318B1/en not_active Revoked
- 1994-06-30 DE DE59408129T patent/DE59408129D1/en not_active Revoked
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3404967A (en) * | 1965-06-24 | 1968-10-08 | Anaconda American Brass Co | Two-hole extrusion |
| FR2344358A2 (en) * | 1976-03-19 | 1977-10-14 | Pechiney Aluminium | NEW BLANKETS FOR IMPACT SPINNING |
| US4313327A (en) * | 1979-12-31 | 1982-02-02 | Peerless Of America, Inc. | Extrusion die for forming multi-passage tubular members |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19532244A1 (en) * | 1995-09-01 | 1997-03-06 | Peak Werkstoff Gmbh | Process for the production of thin tubes (I) |
| DE19532252A1 (en) * | 1995-09-01 | 1997-03-06 | Peak Werkstoff Gmbh | Process for the production of thin tubes (III) |
| DE19532253A1 (en) * | 1995-09-01 | 1997-03-06 | Peak Werkstoff Gmbh | Process for the production of thin tubes (II) |
| DE19532244C2 (en) * | 1995-09-01 | 1998-07-02 | Peak Werkstoff Gmbh | Process for the production of thin-walled tubes (I) |
| DE19532253C2 (en) * | 1995-09-01 | 1998-07-02 | Peak Werkstoff Gmbh | Process for the production of thin-walled pipes (II) |
| DE19532252C2 (en) * | 1995-09-01 | 1999-12-02 | Erbsloeh Ag | Method of manufacturing bushings |
| US6030577A (en) * | 1995-09-01 | 2000-02-29 | Erbsloh Aktiengesellschaft | Process for manufacturing thin pipes |
| US6136106A (en) * | 1995-09-01 | 2000-10-24 | Erbsloh Aktiengesellschaft | Process for manufacturing thin pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0635318B1 (en) | 1999-04-21 |
| DE59408129D1 (en) | 1999-05-27 |
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