EP1448325A1 - Tool made from plastic - Google Patents

Tool made from plastic

Info

Publication number
EP1448325A1
EP1448325A1 EP02783074A EP02783074A EP1448325A1 EP 1448325 A1 EP1448325 A1 EP 1448325A1 EP 02783074 A EP02783074 A EP 02783074A EP 02783074 A EP02783074 A EP 02783074A EP 1448325 A1 EP1448325 A1 EP 1448325A1
Authority
EP
European Patent Office
Prior art keywords
tool
plastic
aluminum
tool according
deep
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
EP02783074A
Other languages
German (de)
French (fr)
Other versions
EP1448325B1 (en
Inventor
Mohamed Mekkaoui Alaoui
Jürgen VOSSBERG
Peter Hochwald
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.)
Huntsman Advanced Materials Switzerland GmbH
Original Assignee
Huntsman Advanced Materials Switzerland GmbH
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 Huntsman Advanced Materials Switzerland GmbH filed Critical Huntsman Advanced Materials Switzerland GmbH
Publication of EP1448325A1 publication Critical patent/EP1448325A1/en
Application granted granted Critical
Publication of EP1448325B1 publication Critical patent/EP1448325B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/01—Selection of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/20—Making tools by operations not covered by a single other subclass

Definitions

  • the present invention relates to a tool consisting of plastic and a material embedded in the plastic with sliding properties.
  • Tools in the sense of the present invention are, in particular, forming tools, for example deep-drawing tools for forming components made of metal, for example automotive components.
  • plastics have also been used as tooling materials, e.g. B. plastics containing metallic fillers. These plastics have the advantage that they are cheaper materials. However, it could be determined that such plastic-based tools cannot be used or can only be used to a limited extent in certain applications for forming tools. This applies in particular to applications in the deep-drawing area, in which workpieces have to be formed in large numbers, so that the tool is subject to high wear. Tools made of plastics also have insufficient compressive strength in these applications.
  • the object of the invention is to provide a plastic tool which on the one hand has good sliding properties and on the other hand also has improved wear properties and a high compressive strength.
  • the plastic tool contains a proportion of embedded aluminum in order to achieve increased pressure resistance and wear resistance, as well as an incorporated material with sliding properties, so that the tool has a quasi self-lubricating effect.
  • graphite or molybdenum sulfide can be considered as a material with sliding properties.
  • the use of graphite powder is particularly preferred.
  • the aluminum can be contained in the plastic tool as a filler, for example in the form of aluminum powder or aluminum particles with a larger grain size. Tools of this type can preferably be produced from an appropriately composed casting resin or from a block material.
  • the tool contains a weight fraction of more than about 50% of aluminum filler.
  • the proportion by weight of aluminum filler in the plastic mass for producing the tool can be a multiple of the proportion of plastic.
  • This weight fraction is preferably at least about 60%, preferably about 70%, of aluminum filler, preferably of aluminum powder, based on the total weight of the plastic composition.
  • the proportion by weight of the material embedded in the plastic with sliding properties is generally less than the proportion of plastic and / or the proportion of aluminum in the mass of plastic.
  • the tool contains a weight fraction of at least about 20% to about 50% graphite powder based on the weight fraction of the plastic contained in the tool, i. that is, not based on the total weight of the plastic mass, but based on the pure plastic content.
  • the proportion by weight of graphite based on the total weight of the material from which the tool is made is preferably at least about 3% to about 15% of graphite.
  • the weight ratio between the graphite portion and the aluminum portion is preferably between about 1:15 and about 1: 6.
  • tools for forming operations in particular deep-drawing tools made of the plastic composition of the type mentioned.
  • these can be punches or sheet metal holders for deep-drawing metal parts.
  • z. B. a metal sheet which is claimed perpendicular to the direction of movement of the deep-drawing tool in a pulling direction, particles, in particular filler particles, are torn out of the plastic matrix and cracks thereby arise in the tool.
  • graphite in the form of graphite powder can be embedded in the plastic as a material with sliding properties.
  • the use of graphite powder with a grain size of between approximately 50 ⁇ m and approximately 250 ⁇ m has proven to be particularly advantageous.
  • the tools according to the invention can essentially consist entirely of a plastic with the above-mentioned inclusions, that is to say that they consist entirely of a homogeneous plastic material and thus differ from the tools according to the aforementioned DE 93 18 272.4 U1, where only a front layer referred to as a guide part the tool consists of a plastic with certain sliding properties.
  • FIG. 1 shows a highly schematically simplified perspective illustration to explain a deep-drawing process by means of a tool according to the invention
  • FIG. 2 shows a second schematically simplified view in section to explain the deep-drawing process
  • FIG. 3 shows a diagram which shows the change in the modulus of elasticity when using plastics with different fillers
  • FIG. 5 shows the associated die for the deep drawing of valve covers with a stamp according to FIG. 4;
  • FIG. 1 shows a highly schematically simplified perspective illustration of an arrangement of tools for deep drawing a sheet metal part 10.
  • An upper tool part 11 is provided for forming the sheet metal part 10 in the deep drawing process, and a lower tool part 12 in the form of a die receiving the upper tool part 11.
  • the upper tool part 11 consists of a Plastic of the type according to the invention, which contains embedded aluminum particles 13, and embedded graphite powder 14 to achieve a self-lubricating effect when the sheet metal part 10 is formed.
  • the upper tool part 11 was produced from a casting resin consisting of plastic, aluminum powder as a filler and graphite powder. 1 kg of plastic, 3 kg of aluminum powder and 200 g of graphite powder were used for a total mass of 4.2 kg of this material. The grain size of the graphite powder varied between 50 and 250 ⁇ m.
  • the plastic tool had very good lubricating properties and a 40% higher compressive strength. The cracking that occurs in the front layer of the tool in the case of tools made of other plastics with conventional fillers such as sand and iron, which occurs because filling particles are torn out of the basic matrix of the plastic material during the deep-drawing process, did not occur when using tools made of the plastic according to the invention.
  • the deep-drawing tools produced from the plastic material mentioned are suitable for forming workpieces in large numbers, for example up to 100,000.00 or more.
  • FIG. 2 illustrates the forces acting on the above-mentioned crack formation during deep drawing with materials without a sufficient lubricating effect on the tool. It is shown in a highly schematically simplified sectional view of an upper tool part 11, which was produced according to the invention from solid casting material consisting of a plastic according to the invention with aluminum and graphite powder as fillers.
  • the lower tool part 15 was also cast from the plastic material according to the invention.
  • the sheet metal part 10 to be formed is located in the gap 16 between the upper tool part 11 and the lower tool part 15 before the deep-drawing process begins. During deep drawing, the sheet metal part 10 to be formed is deformed, with forces occurring in the direction of arrow 17 perpendicular to the direction of movement.
  • the front surfaces 18, 19 of the two tools 11, 15 are subjected to shear stress.
  • the graphite powder embedded in the plastic of the tools 11, 15 ensures a lubricating effect and good sliding properties in the border area between the front surfaces 18, 19, the tools 11, 15 and the drawn sheet metal part 10.
  • FIG. 3 illustrates the percentage change in the modulus of elasticity of tools made of different plastics, which was determined on the basis of pressure tests within the scope of the invention. This was shown in the diagram in column 20 on the far left The modulus of elasticity of a plastic that is only filled with aluminum is shown and assumed as the relative reference value for the other plastics with the value 100. In the second column labeled 22 from the right, the relative value of the elastic modulus for an aluminum-filled PTFE is shown, which, as can be seen, only a good 60% of that in FIG.
  • FIG. 3 reached plastic shown in column 20.
  • the elasticity modules for two plastics produced according to the invention are shown in FIG.
  • the column 23 on the far right in the illustration shows the value for a plastic filled with aluminum and MoS 2 as a sliding material. It can be seen that the modulus of elasticity is over 20% higher than that of the plastic filled with aluminum according to column 20.
  • column 21 (second from the left in the illustration) is the relative value of the modulus of elasticity for one with graphite and Rendered aluminum filled plastic. As can be seen from the illustration, this value is 40% higher than the modulus of elasticity for a plastic that is only filled with aluminum according to column 20 on the far left in the illustration.
  • the value shown in column 21 in FIG. 3 was achieved by adding 20% graphite powder to an aluminum-filled plastic for which the value in column 20 is shown.
  • FIG. 4 shows the deep-drawing stamp for valve cover 30 made of a plastic according to the invention from the underside. Deep drawing tests were carried out with this tool 30. Based on these tests, it was found that both the dimensional accuracy, the service life and the self-lubricating effect improved significantly compared to tools made of other plastics. Tools made from conventional plastics were worn out after a short time. By embedding only about 20% of graphite powder in a plastic filled with aluminum powder, considerably better friction and wear conditions were achieved with the tool 30 shown in FIG. As can be seen in FIG. 4, the deep-drawing stamp has two characteristic shaping elements 31, 32 for producing the depressions or raised areas typical of the shape of the valve cover.
  • FIG. 6 shows exemplary valve covers with different materials, which are produced by means of the in FIG.
  • valve covers 40, 41, 42 shown in FIG. 6 were produced by reshaping titanium sheet, aluminum sheet and galvanized steel sheet each in a material thickness of 1 mm.
  • the characteristic shaping regions namely the flat cylindrical recess 43 (or elevation if one looks from the underside at the deep-drawn valve cover 41 according to FIG. 6) can be seen in the representation according to FIG.
  • This Forming area 43 can be assigned to the forming element 32 of the deep-drawing tool 30 according to FIG. 4.
  • the forming area 44 can accordingly be assigned to the forming element 31 of the deep-drawing tool 30 according to FIG. 4.
  • FIG. 5 shows the die 50 associated with the deep-drawing die 30 according to FIG. 4 for the production of valve covers 40, 41, 42, as shown in FIG. 6.
  • the punch 30 is lowered into the deep-drawing die 50 shown in FIG. 5 shows the approximately rectangular shape of the die 50 corresponding to the punch 30 and rounded at the corner areas.
  • the deformed area 51 assigned to the approximately cylindrical forming element 32 can be seen as a depression in the deep-drawing tool serving as the die 50.
  • the die 50 according to FIG. 5 was also produced from the plastic according to the invention containing aluminum and graphite powder.
  • plastic tools made from the materials according to the invention compared to conventional steel tools lie in the material costs, for example, which are up to about 70% lower.
  • the plastics used for the production of the tools are easier to process and as a result the mechanical use in the production of the tools is lower.
  • the energy and power requirements in machine work for the manufacture of the tools can be z. B. reduce by 65%.
  • the training period is also up to 60% shorter, for example, than with steel tools.
  • the use of plastics according to the invention for the manufacture of the tools leads to a considerable weight reduction of, for example, up to 60% and thus to a lower load on the crane systems.
  • the tools can be changed more flexibly and cost-effectively, which in turn saves a lot of money, time and energy.
  • the tools are also suitable for recycling since they can be completely reused as fillers for the production of new plastic tools, which means that there are no disposal costs.
  • the elastic behavior of the plastics leads to an increase in the quality of the formed workpieces.
  • Embedding graphite in the plastic of the tools creates a self-lubricating effect on the contact layers of the tool. If it is still necessary to use liquid lubricants during the forming process, then the amount of lubricants required can be reduced significantly, for example by approx. 3 g / m 2 .
  • the friction conditions at Deep drawing is improved by introducing graphite powder into the plastic. The elimination or reduction of liquid lubricants during deep drawing significantly reduces pollution in the work area and thus relieves the environment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Lubricants (AREA)

Abstract

The invention relates to tools (11, 12), made from plastic and a material with slide bearing properties inlaid in the plastic, whereby the plastic tools further comprise a component of inlaid aluminium. Said plastic tools are suitable for the moulding, in particular the deep-drawing of metallic workpieces (10), such as for example components of automobiles. The tools have a high pressure-resistance and wear resistance and permit deep-drawing with essentially small amounts of, or no, lubricants as a result of said slide bearing properties.

Description

Werkzeug aus Kunststoff Plastic tool
Die vorliegende Erfindung betrifft ein Werkzeug bestehend aus Kunststoff und einem in dem Kunststoff eingelagerten Material mit Gleiteigenschaften. Werkzeuge im Sinne der vorliegenden Erfindung sind insbesondere Umformwerkzeuge, beispielsweise Tiefziehwerkzeuge für das Umformen von Bauteilen aus Metall, beispielsweise Automobilbauteilen.The present invention relates to a tool consisting of plastic and a material embedded in the plastic with sliding properties. Tools in the sense of the present invention are, in particular, forming tools, for example deep-drawing tools for forming components made of metal, for example automotive components.
Herkömmlicherweise werden beim Tiefziehen Werkzeuge aus Stahl oder Grauguss verwendet. Seit einiger Zeit verwendet man zum Umformen auch bereits Kunststoffe als Werkzeugwerkstoffe, z. B. Kunststoffe, die metallische Füllstoffe enthalten. Diese Kunststoffe haben den Vorteil, dass sie kostengünstigere Werkstoffe darstellen. Allerdings konnte festgestellt werden, dass solche Werkzeuge auf Kunststoffbasis in bestimmten Anwendungsfällen für Umformwerkzeuge nicht oder nur bedingt einsetzbar sind. Dies gilt insbesondere bei Anwendungen im Tiefziehbereich, bei denen Werkstücke in hohen Stückzahlen umgeformt werden müssen, so dass das Werkzeug einem hohen Verschleiß unterliegt. Werkzeuge aus Kunststoffen weisen zudem in diesen Anwendungsfällen eine zu geringe Druckfestigkeit auf.Traditionally, tools made of steel or cast iron are used for deep drawing. For some time now, plastics have also been used as tooling materials, e.g. B. plastics containing metallic fillers. These plastics have the advantage that they are cheaper materials. However, it could be determined that such plastic-based tools cannot be used or can only be used to a limited extent in certain applications for forming tools. This applies in particular to applications in the deep-drawing area, in which workpieces have to be formed in large numbers, so that the tool is subject to high wear. Tools made of plastics also have insufficient compressive strength in these applications.
Die DE 93 18 272.4 U1 beschreibt ein Werkzeug für die spanlose Verformung von Werkstücken, wobei das Werkzeug an sich aus einem metallischen Werkstoff, insbesondere Grauguss besteht, aber ein Führungsteil des Werkzeugs, welches eine Gleitfläche aufweist, aus einem Duroplast mit Faser- oder Gewebeeinlage und mit Einlagerungen aus Lamellengraphit hergestellt ist. Dadurch sollen die Gleiteigenschaften verbessert und der Verschleiß gemindert werden.DE 93 18 272.4 U1 describes a tool for the non-cutting deformation of workpieces, the tool itself consisting of a metallic material, in particular gray cast iron, but a guide part of the tool, which has a sliding surface, made of a thermoset with fiber or fabric insert and is made with lamellar graphite. This should improve the sliding properties and reduce wear.
Die Aufgabe der Erfindung besteht darin, ein aus Kunststoff bestehendes Werkzeug zu schaffen, welches einerseits gute Gleiteigenschaften und andererseits auch verbesserte Verschleißeigenschaften und eine hohe Druckfestigkeit aufweist.The object of the invention is to provide a plastic tool which on the one hand has good sliding properties and on the other hand also has improved wear properties and a high compressive strength.
Die Lösung dieser Aufgabe liefert ein erfindungsgemäßes Werkzeug mit den Merkmalen des Hauptanspruchs. Erfindungsgemäß enthält das Kunststoffwerkzeug einen Anteil an eingelagertem Aluminium zur Erzielung einer erhöhten Druckfestigkeit und Verschleißbeständigkeit sowie weiterhin ein eingelagertes Material mit Gleiteigenschaften, so dass das Werkzeug quasi einen Selbstschmiereffekt besitzt. Dadurch erübrigt sich in der Regel die Verwendung eines zusätzlichen Schmiermittels im Bereich zwischen dem Umformwerkzeug und dem zu verformenden Werkstück. Anhand von Versuchen konnte gezeigt werden, dass sich die Standzeit des Werkzeugs durch die erfindungsgemäßen Einlagerungen wesentlich verbessern lässt. Als Material mit Gleiteigenschaften kommen beispielsweise Graphit oder Molybdänsulfid in Betracht. Besonders bevorzugt ist die Verwendung von Graphitpulver. Das Aluminium kann als Füllstoff beispielsweise in Form von Aluminiumpulver oder Aluminiumpartikeln mit größerer Körnung in dem Kunststoffwerkzeug enthalten sein. Werkzeuge dieser Art lassen sich vorzugsweise aus einem entsprechend zusammengesetzten Gießharz oder aus einem Blockmaterial herstellen.A tool according to the invention with the features of the main claim provides the solution to this problem. According to the invention, the plastic tool contains a proportion of embedded aluminum in order to achieve increased pressure resistance and wear resistance, as well as an incorporated material with sliding properties, so that the tool has a quasi self-lubricating effect. This generally eliminates the need to use an additional lubricant in the area between the forming tool and the workpiece to be deformed. Based on experiments are shown that the service life of the tool can be significantly improved by the inclusions according to the invention. For example, graphite or molybdenum sulfide can be considered as a material with sliding properties. The use of graphite powder is particularly preferred. The aluminum can be contained in the plastic tool as a filler, for example in the form of aluminum powder or aluminum particles with a larger grain size. Tools of this type can preferably be produced from an appropriately composed casting resin or from a block material.
Gemäß einer bevorzugten Weiterbildung der Erfindung enthält das Werkzeug einen Gewichtsanteil von mehr als etwa 50 % an Aluminiumfüllstoff. Der Gewichtsanteil an Aluminiumfüllstoff der Kunststoffmasse zur Herstellung des Werkzeugs kann ein Mehrfaches des Kunststoffanteils betragen. Vorzugsweise liegt dieser Gewichtsanteil bei wenigstens etwa 60 % vorzugsweise etwa 70 % an Aluminiumfüllstoff, vorzugsweise an Aluminiumpulver, bezogen auf das Gesamtgewicht der Kunststoffmasse.According to a preferred development of the invention, the tool contains a weight fraction of more than about 50% of aluminum filler. The proportion by weight of aluminum filler in the plastic mass for producing the tool can be a multiple of the proportion of plastic. This weight fraction is preferably at least about 60%, preferably about 70%, of aluminum filler, preferably of aluminum powder, based on the total weight of the plastic composition.
Der Gewichtsanteil des in den Kunststoff eingelagerten Materials mit Gleiteigenschaften ist in der Regel geringer als der Kunststoffanteil und/oder der Aluminiumanteil der Kunststoffmasse. Vorzugsweise enthält das Werkzeug einen Gewichtsanteil von wenigstens etwa 20 % bis etwa 50 % an Graphitpulver bezogen auf den Gewichtsanteil des in dem Werkzeug enthaltenen Kunststoffs, d. h., nicht bezogen auf das Gesamtgewicht der Kunststoffmasse, sondern bezogen auf den reinen Kunststoffanteil. Der Gewichtsanteil des Graphits bezogen auf das Gesamtgewicht des Werkstoffs, aus dem das Werkzeug besteht, beträgt vorzugsweise wenigstens etwa 3 % bis etwa 15 % an Graphit. Das Gewichtsverhältnis zwischen dem Graphitanteil und dem Aluminiumanteil liegt vorzugsweise bei zwischen etwa 1 : 15 und etwa 1 : 6.The proportion by weight of the material embedded in the plastic with sliding properties is generally less than the proportion of plastic and / or the proportion of aluminum in the mass of plastic. Preferably, the tool contains a weight fraction of at least about 20% to about 50% graphite powder based on the weight fraction of the plastic contained in the tool, i. that is, not based on the total weight of the plastic mass, but based on the pure plastic content. The proportion by weight of graphite based on the total weight of the material from which the tool is made is preferably at least about 3% to about 15% of graphite. The weight ratio between the graphite portion and the aluminum portion is preferably between about 1:15 and about 1: 6.
Bevorzugt ist im Rahmen der vorliegenden Erfindung die Herstellung von Werkzeugen für Umformvorgänge, insbesondere von Tiefziehwerkzeugen aus der Kunststoffmasse der genannten Art. Beispielsweise können dies Stempel oder Blechhalter für das Tiefziehen von Metallteilen sein. Durch die Einlagerung des Materials mit Gleiteigenschaften wird verhindert, dass beim Tiefziehvorgang z. B. eines Metallblechs, welches dabei in einer Zugrichtung senkrecht zur Bewegungsrichtung des Tiefziehwerkzeugs beansprucht wird, Partikel, insbesondere Füllstoffpartikel aus der Kunststoffmatrix herausgerissen werden und dadurch Risse im Werkzeug entstehen. Es wurde bereits erwähnt, dass Graphit in Form von Graphitpulver als Material mit Gleiteigenschaften in den Kunststoff eingelagert werden kann. Es hat sich die Verwendung von Graphitpulver in einer Korngröße von zwischen etwa 50 μm und etwa 250 μm als besonders vorteilhaft erwiesen. Die erfindungsgemäßen Werkzeuge können im wesentlichen vollständig aus einem Kunststoff mit den genannten Einlagerungen bestehen, d. h., dass sie durchgehend aus einem homogenen Kunststoffwerkstoff bestehen und sich damit von den Werkzeugen gemäß der eingangs erwähnten DE 93 18 272.4 U1 unterscheiden, wo lediglich eine als Führungsteil bezeichnete Frontschicht des Werkzeugs aus einem Kunststoff mit gewissen Gleiteigenschaften besteht.In the context of the present invention, it is preferred to produce tools for forming operations, in particular deep-drawing tools made of the plastic composition of the type mentioned. For example, these can be punches or sheet metal holders for deep-drawing metal parts. By storing the material with sliding properties, it is prevented that z. B. a metal sheet, which is claimed perpendicular to the direction of movement of the deep-drawing tool in a pulling direction, particles, in particular filler particles, are torn out of the plastic matrix and cracks thereby arise in the tool. It has already been mentioned that graphite in the form of graphite powder can be embedded in the plastic as a material with sliding properties. The use of graphite powder with a grain size of between approximately 50 μm and approximately 250 μm has proven to be particularly advantageous. The tools according to the invention can essentially consist entirely of a plastic with the above-mentioned inclusions, that is to say that they consist entirely of a homogeneous plastic material and thus differ from the tools according to the aforementioned DE 93 18 272.4 U1, where only a front layer referred to as a guide part the tool consists of a plastic with certain sliding properties.
Die in den Unteransprüchen genannten Merkmale betreffen bevorzugte Weiterbildungen der erfindungsgemäßen Aufgabenlösung. Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Detailbeschreibung.The features mentioned in the subclaims relate to preferred developments of the task solution according to the invention. Further advantages of the invention result from the following detailed description.
Nachfolgend wird die vorliegende Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Zeichnungen näher beschrieben. Dabei zeigenThe present invention is described in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings. Show
Fig. 1 eine stark schematisch vereinfachte perspektivische Darstellung zur Erläuterung eines Tiefziehvorgangs mittels eines erfϊndungsgemäßen Werkzeugs;1 shows a highly schematically simplified perspective illustration to explain a deep-drawing process by means of a tool according to the invention;
Fig. 2 eine zweite schematisch vereinfachte Ansicht im Schnitt zur Erläuterung des Tiefziehvorgangs;2 shows a second schematically simplified view in section to explain the deep-drawing process;
Fig. 3 ein Diagramm, welches die Veränderung des E-Moduls bei Verwendung von Kunststoffen mit unterschiedlichen Füllstoffen zeigt;3 shows a diagram which shows the change in the modulus of elasticity when using plastics with different fillers;
Fig. 4 einen Stempel für das Tiefziehen von Ventildeckeln für Motoren in perspektivischer Darstellung;4 shows a stamp for deep drawing valve covers for engines in a perspective view;
Fig. 5 die zugehörige Matrize für das Tiefziehen von Ventildeckeln mit einem Stempel gemäß Figur 4;5 shows the associated die for the deep drawing of valve covers with a stamp according to FIG. 4;
Fig. 6 mittels Stempel und Matrize gemäß den Figuren 4 und 5 tiefgezogene Ventildeckel.Fig. 6 by means of stamp and die according to Figures 4 and 5 deep-drawn valve cover.
Zunächst wird auf Figur 1 Bezug genommen. Die Zeichnung zeigt in stark schematisch vereinfachter perspektivischer Darstellung eine Anordnung von Werkzeugen für das Tiefziehen eines Blechteils 10. Es ist ein Werkzeugoberteil 11 zur Umformung des Blechteils 10 im Tiefziehverfahren vorgesehen sowie ein Werkzeugunterteil 12 in Form einer das Werkzeugoberteil 11 aufnehmenden Matrize. Das Werkzeugoberteil 11 besteht aus einem Kunststoff der erfindungsgemäßen Art, welcher eingelagerte Aluminiumpartikel 13 enthält, sowie eingelagertes Graphit-Pulver 14 zur Erzielung eines Selbstschmiereffekts bei der Umformung des BlechteilslO.Reference is first made to FIG. 1. The drawing shows a highly schematically simplified perspective illustration of an arrangement of tools for deep drawing a sheet metal part 10. An upper tool part 11 is provided for forming the sheet metal part 10 in the deep drawing process, and a lower tool part 12 in the form of a die receiving the upper tool part 11. The upper tool part 11 consists of a Plastic of the type according to the invention, which contains embedded aluminum particles 13, and embedded graphite powder 14 to achieve a self-lubricating effect when the sheet metal part 10 is formed.
Das Werkzeugoberteil 11 wurde hergestellt aus einem Gießharz bestehend aus Kunststoff, Aluminiumpulver als Füllstoff und Graphit-Pulver. Dabei wurden für eine Masse von insgesamt 4,2 kg dieses Werkstoffs 1 kg Kunststoff, 3 kg Aluminiumpulver und 200 g Graphitpulver verwendet. Die Korngröße des Graphitpulvers variierte zwischen 50 und 250 μm. Das Kunststoffwerkzeug hatte sehr gute Schmiereigenschaften und eine um 40 % höhere Druckfestigkeit. Die bei Werkzeugen aus anderen Kunststoffen mit konventionellen Füllstoffen wie beispielsweise Sand und Eisen in der Frontschicht des Werkzeugs auftretende Rissbildung, die dadurch entsteht, dass beim Tiefziehvorgang Füllpartikel aus der Grundmatrix des Kunststoffmaterials herausgerissen werden, trat bei Verwendung von Werkzeugen aus dem erfindungsgemäßen Kunststoff nicht auf.The upper tool part 11 was produced from a casting resin consisting of plastic, aluminum powder as a filler and graphite powder. 1 kg of plastic, 3 kg of aluminum powder and 200 g of graphite powder were used for a total mass of 4.2 kg of this material. The grain size of the graphite powder varied between 50 and 250 μm. The plastic tool had very good lubricating properties and a 40% higher compressive strength. The cracking that occurs in the front layer of the tool in the case of tools made of other plastics with conventional fillers such as sand and iron, which occurs because filling particles are torn out of the basic matrix of the plastic material during the deep-drawing process, did not occur when using tools made of the plastic according to the invention.
Es wurde festgestellt, dass sich die aus der genannten Kunststoffmasse hergestellten Tiefziehwerkzeuge für eine Umformung von Werkstücken in hohen Stückzahlen, von beispielsweise bis zu 100.000,00 oder darüber hinaus eignen.It was found that the deep-drawing tools produced from the plastic material mentioned are suitable for forming workpieces in large numbers, for example up to 100,000.00 or more.
Figur 2 verdeutlicht die zu der genannten Rissbildung beim Tiefziehen mit Materialien ohne ausreichenden Schmiereffekt auf das Werkzeug einwirkenden Kräfte. Es ist in stark schematisch vereinfachter Schnittdarstellung ein Werkzeugoberteil 11 dargestellt, welches erfindungsgemäß aus Vollgussmaterial bestehend aus einem erfindungsgemäßen Kunststoff mit Aluminium- und Graphitpulver als Füllstoffen hergestellt wurde. Auch das Werkzeugunterteil 15 wurde aus dem erfindungsgemäßen Kunststoffmaterial gegossen. Das umzuformende Blechteil 10 befindet sich vor dem Einsetzen des Tiefziehvorgangs in dem Spalt 16 zwischen Werkzeugoberteil 11 und Werkzeugunterteil 15. Beim Tiefziehen wird das umzuformende Blechteil 10 verformt, wobei Kräfte in Richtung des Pfeils 17 senkrecht zur Bewegungsrichtung auftreten. Dadurch werden die Frontflächen 18, 19 der beiden Werkzeuge 11 , 15 auf Scherung beansprucht. Das in dem Kunststoff der Werkzeuge 11 , 15 eingelagerte Graphitpulver sorgt für einen Schmiereffekt und gute Gleiteigenschaften im Grenzbereich zwischen den Frontflächen 18, 19, der Werkzeuge 11 , 15 und dem gezogenen Blechteil 10.FIG. 2 illustrates the forces acting on the above-mentioned crack formation during deep drawing with materials without a sufficient lubricating effect on the tool. It is shown in a highly schematically simplified sectional view of an upper tool part 11, which was produced according to the invention from solid casting material consisting of a plastic according to the invention with aluminum and graphite powder as fillers. The lower tool part 15 was also cast from the plastic material according to the invention. The sheet metal part 10 to be formed is located in the gap 16 between the upper tool part 11 and the lower tool part 15 before the deep-drawing process begins. During deep drawing, the sheet metal part 10 to be formed is deformed, with forces occurring in the direction of arrow 17 perpendicular to the direction of movement. As a result, the front surfaces 18, 19 of the two tools 11, 15 are subjected to shear stress. The graphite powder embedded in the plastic of the tools 11, 15 ensures a lubricating effect and good sliding properties in the border area between the front surfaces 18, 19, the tools 11, 15 and the drawn sheet metal part 10.
Figur 3 verdeutlicht die prozentuale Veränderung des Elastizitätsmoduls von Werkzeugen aus verschiedenen Kunststoffen, die anhand von Druckversuchen im Rahmen der Erfindung ermittelt wurde. Dabei wurde in dem Diagramm in der Säule 20 ganz links das Elastizitätsmodul eines lediglich mit Aluminium gefüllten Kunststoffs dargestellt und als relative Bezugsgröße für die anderen Kunststoffe mit dem Wert 100 angenommen. In der mit 22 bezeichneten zweiten Säule von rechts ist der relative Wert des Elastizitätsmoduls für ein mit Aluminium gefülltes PTFE wiedergegeben, das, wie man sieht, nur gut 60 % des in FigurFIG. 3 illustrates the percentage change in the modulus of elasticity of tools made of different plastics, which was determined on the basis of pressure tests within the scope of the invention. This was shown in the diagram in column 20 on the far left The modulus of elasticity of a plastic that is only filled with aluminum is shown and assumed as the relative reference value for the other plastics with the value 100. In the second column labeled 22 from the right, the relative value of the elastic modulus for an aluminum-filled PTFE is shown, which, as can be seen, only a good 60% of that in FIG
3 in Säule 20 dargestellten Kunststoffs erreicht. Zum Vergleich sind dagegen in Figur 3 die Elastizitätsmodule für zwei erfindungsgemäß hergestellte Kunststoffe wiedergegeben. Die Säule 23 ganz rechts in der Darstellung gibt den Wert für einen mit Aluminium und MoS2 als Gleitmaterial gefüllten Kunststoff wieder. Man erkennt, dass das E-Modul über 20 % höher liegt als bei dem nur mit Aluminium gefüllten Kunststoff gemäß Säule 20. In der Säule 21 (zweite von links in der Darstellung) ist der relative Wert des E-Moduls für einen mit Graphit und Aluminium gefüllten Kunststoff wiedergegeben. Wie man aus der Darstellung erkennt, liegt dieser Wert um 40 % höher als das E-Modul für einen nur mit Aluminium gefüllten Kunststoff gemäß der Säule 20 ganz links in der Darstellung. Der in Säule 21 in Figur 3 wiedergegebene Wert wurde erreicht durch einen Zusatz von 20 % Graphitpulver zu einem aluminiumgefüllten Kunststoff für den der Wert in Säule 20 wiedergegeben ist.3 reached plastic shown in column 20. For comparison, however, the elasticity modules for two plastics produced according to the invention are shown in FIG. The column 23 on the far right in the illustration shows the value for a plastic filled with aluminum and MoS 2 as a sliding material. It can be seen that the modulus of elasticity is over 20% higher than that of the plastic filled with aluminum according to column 20. In column 21 (second from the left in the illustration) is the relative value of the modulus of elasticity for one with graphite and Rendered aluminum filled plastic. As can be seen from the illustration, this value is 40% higher than the modulus of elasticity for a plastic that is only filled with aluminum according to column 20 on the far left in the illustration. The value shown in column 21 in FIG. 3 was achieved by adding 20% graphite powder to an aluminum-filled plastic for which the value in column 20 is shown.
Es wurde für Tiefziehversuche ein in Figur 4 perspektivisch dargestelltes Tiefziehwerkzeug 30 zur Herstellung von Ventildeckeln für einen Dreizylindermotor konzipiert, ausgelegt und gefertigt. Figur 4 zeigt den Tiefziehstempel für Ventildeckel 30 aus einem erfindungsgemäßen Kunststoff von der Unterseite. Mit diesem Werkzeug 30 wurden Tiefziehversuche durchgeführt. Anhand dieser Versuche konnte festgestellt werden, dass sich sowohl die Maßgenauigkeit, die Standzeit als auch der Selbstschmiereffekt gegenüber Werkzeugen aus anderen Kunststoffen stark verbesserten. Aus herkömmlichen Kunststoffen hergestellte Werkzeuge waren nach kurzer Zeit verschlissen. Durch das Einbetten von lediglich etwa 20 % an Graphitpulver in einen mit Aluminiumpulver gefüllten Kunststoff wurden mit dem in Figur 4 dargestellten Werkzeug 30 erheblich bessere Reib- und Verschleißverhältnisse erreicht. Wie man in Figur 4 erkennt, weist der Tiefziehstempel zwei charakteristische Umformelemente 31 , 32 zur Herstellung der für die Form des Ventildeckels typischen Vertiefungen bzw. erhabenen Bereiche auf.A deep-drawing tool 30, shown in perspective in FIG. 4, for producing valve covers for a three-cylinder engine was designed, designed and manufactured for deep-drawing tests. FIG. 4 shows the deep-drawing stamp for valve cover 30 made of a plastic according to the invention from the underside. Deep drawing tests were carried out with this tool 30. Based on these tests, it was found that both the dimensional accuracy, the service life and the self-lubricating effect improved significantly compared to tools made of other plastics. Tools made from conventional plastics were worn out after a short time. By embedding only about 20% of graphite powder in a plastic filled with aluminum powder, considerably better friction and wear conditions were achieved with the tool 30 shown in FIG. As can be seen in FIG. 4, the deep-drawing stamp has two characteristic shaping elements 31, 32 for producing the depressions or raised areas typical of the shape of the valve cover.
Figur 6 zeigt beispielhafte Ventildeckel mit verschiedenen Materialien, die mittels des in FigurFIG. 6 shows exemplary valve covers with different materials, which are produced by means of the in FIG
4 dargestellten Tiefziehwerkzeugs 30 hergestellt wurden. Die in Figur 6 gezeigten Ventildeckel 40, 41 , 42 wurden hergestellt durch Umformung von Titanblech, Aluminiumblech und verzinktem Stahlblech jeweils in einer Materialstärke von 1 mm. Man erkennt in der Darstellung gemäß Figur 6 ohne weiteres die charakteristischen Umformbereiche, nämlich die flache zylindrische Vertiefung 43 (bzw. Erhöhung, wenn man von der Unterseite auf den tiefgezogenen Ventildeckel 41 gemäß Figur 6 schaut). Dieser Umformbereich 43 lässt sich dem Umformelement 32 des Tiefziehwerkzeugs 30 gemäß Figur 4 zuordnen. Entsprechend lässt sich der Umformbereich 44 dem Umformelement 31 des Tiefziehwerkzeugs 30 gemäß Figur 4 zuordnen. Beim Tiefziehen der in Figur 6 dargestellten Ventildeckel mit dem erfindungsgemäßen Werkzeug 30 ließen sich bei allen drei Materialien Titanblech, Aluminiumblech, verzinktes Stahlblech, sehr gute Ergebnisse erzielen.4 deep drawing tool 30 shown were produced. The valve covers 40, 41, 42 shown in FIG. 6 were produced by reshaping titanium sheet, aluminum sheet and galvanized steel sheet each in a material thickness of 1 mm. The characteristic shaping regions, namely the flat cylindrical recess 43 (or elevation if one looks from the underside at the deep-drawn valve cover 41 according to FIG. 6) can be seen in the representation according to FIG. This Forming area 43 can be assigned to the forming element 32 of the deep-drawing tool 30 according to FIG. 4. The forming area 44 can accordingly be assigned to the forming element 31 of the deep-drawing tool 30 according to FIG. 4. When the valve cover shown in FIG. 6 is deep-drawn with the tool 30 according to the invention, very good results could be achieved with all three materials, titanium sheet, aluminum sheet, galvanized steel sheet.
Figur 5 zeigt die für den Tiefziehstempel 30 gemäß Figur 4 zugehörige Matrize 50 zur Herstellung von Ventildeckeln 40, 41 , 42, wie sie in Figur 6 dargestellt sind. In die in Figur 5 dargestellte Tiefziehmatrize 50 wird der Stempel 30 abgesenkt. Man erkennt in Figur 5 die dem Stempel 30 entsprechende etwa rechteckige an den Eckbereichen abgerundete Form der Matrize 50. Außerdem ist der dem etwa zylindrischen Umformelement 32 zugeordnete Umformbereich 51 als Senke in dem als Matrize 50 dienenden Tiefziehwerkzeug erkennbar. Auch die Matrize 50 gemäß Figur 5 wurde aus dem erfindungsgemäßen Kunststoff enthaltend Aluminium und Graphitpulver hergestellt.FIG. 5 shows the die 50 associated with the deep-drawing die 30 according to FIG. 4 for the production of valve covers 40, 41, 42, as shown in FIG. 6. The punch 30 is lowered into the deep-drawing die 50 shown in FIG. 5 shows the approximately rectangular shape of the die 50 corresponding to the punch 30 and rounded at the corner areas. In addition, the deformed area 51 assigned to the approximately cylindrical forming element 32 can be seen as a depression in the deep-drawing tool serving as the die 50. The die 50 according to FIG. 5 was also produced from the plastic according to the invention containing aluminum and graphite powder.
Die Vorteile der Kunststoffwerkzeuge aus den erfindungsgemäßen Materialien gegenüber herkömmlichen Stahlwerkzeugen liegen in den beispielsweise bis zu etwa 70 % niedrigeren Materialkosten. Die für die Herstellung der Werkzeuge verwendeten Kunststoffe lassen sich besser verarbeiten und dadurch ist bei der Herstellung der Werkzeuge der maschinelle Einsatz geringer. Der Energie- und Leistungsbedarf bei der Maschinenarbeit zur Herstellung der Werkzeuge lässt sich z. B. um 65 % reduzieren. Die Einarbeitungszeit ist ebenfalls bis zu beispielsweise 60 % kürzer als bei Stahlwerkzeugen. Die Verwendung von erfindungsgemäßen Kunststoffen zur Herstellung der Werkzeuge führt zu einer erheblichen Gewichtsreduzierung von beispielsweise bis zu 60 % und dadurch zu einer geringeren Belastung der Krananlagen. Die Werkzeuge lassen sich flexibler und kostengünstiger ändern, wobei wiederum eine hohe Kosten-, Zeit-, und Energieersparnis erzielt wird. Die Werkzeuge sind außerdem recyclinggeeignet, da sie sich als Füllstoffe zur Herstellung neuer Kunststoffwerkzeuge vollständig wiederverwenden lassen, wodurch die Entsorgungskosten entfallen.The advantages of plastic tools made from the materials according to the invention compared to conventional steel tools lie in the material costs, for example, which are up to about 70% lower. The plastics used for the production of the tools are easier to process and as a result the mechanical use in the production of the tools is lower. The energy and power requirements in machine work for the manufacture of the tools can be z. B. reduce by 65%. The training period is also up to 60% shorter, for example, than with steel tools. The use of plastics according to the invention for the manufacture of the tools leads to a considerable weight reduction of, for example, up to 60% and thus to a lower load on the crane systems. The tools can be changed more flexibly and cost-effectively, which in turn saves a lot of money, time and energy. The tools are also suitable for recycling since they can be completely reused as fillers for the production of new plastic tools, which means that there are no disposal costs.
Das elastische Verhalten der Kunststoffe führt zu einer Qualitätserhöhung bei den umgeformten Werkstücken. Durch das Einbetten von Graphit in den Kunststoff der Werkzeuge wird ein Selbstschmiereffekt an den Kontaktschichten des Werkzeugs erzeugt. Wenn es bei der Umformung überhaupt noch notwendig ist, zusätzlich flüssige Schmiermittel einzusetzen, dann lässt sich in jedem Fall die Menge der notwendigen Schmiermittel wesentlich verringern, beispielsweise um ca. 3 g/m2. Die Reibungsverhältnisse beim Tiefziehen werden durch das Einbringen von Graphitpulver in den Kunststoff verbessert. Durch das Entfallen bzw. die Verringerung von flüssigen Schmiermitteln beim Tiefziehen wird die Verschmutzung im Arbeitsbereich wesentlich verringert und damit die Umwelt entlastet. The elastic behavior of the plastics leads to an increase in the quality of the formed workpieces. Embedding graphite in the plastic of the tools creates a self-lubricating effect on the contact layers of the tool. If it is still necessary to use liquid lubricants during the forming process, then the amount of lubricants required can be reduced significantly, for example by approx. 3 g / m 2 . The friction conditions at Deep drawing is improved by introducing graphite powder into the plastic. The elimination or reduction of liquid lubricants during deep drawing significantly reduces pollution in the work area and thus relieves the environment.
B e z u g s z e i c h e n l i s t eB e z u g s z e i c h e n l i s t e
Blechteil Werkzeugoberteil Werkzeugunterteil Aluminiumpartikel Graphit-Pulver Werkzeugunterteil Spalt Pfeil Frontfläche Frontfläche Säule Säule Säule Säule Tiefziehwerkzeug Umformelement Umformelement Ventildeckel Ventildeckel Ventildeckel Vertiefung Umformbereich Tiefziehmatrize Umformbereich Sheet metal part Tool upper part Tool lower part Aluminum particles Graphite powder Tool lower part Gap arrow Front surface Front surface Column Column Column Column Deep-drawing tool Forming element Forming element Valve cover Valve cover Valve cover Deepening Forming area Deep-drawing die Forming area

Claims

PATE NTAN S P RÜ C H E PATE NTAN SP RÜ CHE
1. Werkzeug bestehend aus Kunststoff und einem in dem Kunststoff eingelagerten Material mit Gleiteigenschaften, dadurch gekennzeichnet, dass das Kunststoffwerkzeug weiterhin einen Anteil an eingelagertem Aluminium enthält.1. Tool consisting of plastic and a material embedded in the plastic with sliding properties, characterized in that the plastic tool also contains a proportion of aluminum embedded.
2. Werkzeug nach Anspruch 1 , dadurch gekennzeichnet, dass das Werkzeug Aluminiumpulver oder Aluminiumpartikel als Füllstoff enthält.2. Tool according to claim 1, characterized in that the tool contains aluminum powder or aluminum particles as a filler.
3. Werkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Werkzeug als3. Tool according to claim 1 or 2, characterized in that the tool as
Material mit Gleiteigenschaften Graphit oder Molybdänsulfid enthält.Material with sliding properties contains graphite or molybdenum sulfide.
4. Werkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass dieses4. Tool according to one of claims 1 to 3, characterized in that this
Graphitpulver enthält.Contains graphite powder.
5. Werkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das5. Tool according to one of claims 1 to 4, characterized in that the
Werkzeug aus einem Blockmaterial oder einem Gießharz hergestellt ist.Tool is made of a block material or a casting resin.
6. Werkzeug nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass dieses einen Gewichtsanteil von mehr als etwa 50 % an Aluminiumfüllstoff enthält.6. Tool according to one of claims 1 to 5, characterized in that it contains a weight fraction of more than about 50% of aluminum filler.
7. Werkzeug nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass dieses einen Gewichtsanteil von wenigstens etwa 60 %, vorzugsweise etwa 70 % an Aluminiumfüllstoff, vorzugsweise Aluminiumpulver bezogen auf das Gesamtgewicht enthält.7. Tool according to one of claims 1 to 6, characterized in that it contains a weight fraction of at least about 60%, preferably about 70% of aluminum filler, preferably aluminum powder, based on the total weight.
8. Werkzeug nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass dieses einen Gewichtsanteil von wenigstens etwa 20 % bis etwa 50 % an Graphitpulver bezogen auf den Gewichtsanteil des in dem Werkzeug enthaltenen Kunststoffs enthält.8. Tool according to one of claims 1 to 7, characterized in that it contains a proportion by weight of at least about 20% to about 50% of graphite powder based on the proportion by weight of the plastic contained in the tool.
9. Werkzeug nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass dieses einen Gewichtsanteil von wenigstens etwa 3 % bis etwa 15 % an Graphit, vorzugsweise Graphitpulver, bezogen auf das Gesamtgewicht des Werkstoffs, aus dem das Werkzeug besteht, enthält. 9. Tool according to one of claims 1 to 8, characterized in that it contains a weight fraction of at least about 3% to about 15% of graphite, preferably graphite powder, based on the total weight of the material from which the tool is made.
10. Werkzeug nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass dieses10. Tool according to one of claims 1 to 9, characterized in that this
Graphit, vorzugsweise Graphitpulver und Aluminium, vorzugsweise Aluminiumpulver, in einem Gewichtsverhältnis von zwischen etwa 1 : 15 und etwa 1 : 6 enthält.Contains graphite, preferably graphite powder and aluminum, preferably aluminum powder, in a weight ratio of between about 1:15 and about 1: 6.
11. Werkzeug nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass dieses ein Umformwerkzeug, insbesondere ein Tiefziehwerkzeug ist.11. Tool according to one of claims 1 to 10, characterized in that it is a forming tool, in particular a deep-drawing tool.
12. Werkzeug nach einem der Ansprüche 1 bis 11 , dadurch gekennzeichnet, dass dieses ein Stempel, Blechhalter oder eine Matrize für das Tiefziehen von Metallteilen ist.12. Tool according to one of claims 1 to 11, characterized in that this is a stamp, sheet holder or a die for the deep drawing of metal parts.
13. Werkzeug nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass dieses13. Tool according to one of claims 1 to 12, characterized in that this
Graphitpulver in einer Korngröße von zwischen etwa 50 und etwa 250 μm enthält.Contains graphite powder in a grain size of between about 50 and about 250 microns.
14. Werkzeug nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass dieses im wesentlichen vollständig aus einem Kunststoff nach Maßgabe eines der vorhergehenden Ansprüche besteht. 14. Tool according to one of claims 1 to 13, characterized in that it consists essentially entirely of a plastic according to one of the preceding claims.
EP02783074A 2001-11-09 2002-11-06 Forming tool made of plastic Expired - Fee Related EP1448325B1 (en)

Applications Claiming Priority (3)

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DE10155233 2001-11-09
DE10155233A DE10155233A1 (en) 2001-11-09 2001-11-09 Plastic tool
PCT/EP2002/012388 WO2003039779A1 (en) 2001-11-09 2002-11-06 Tool made from plastic

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EP1448325A1 true EP1448325A1 (en) 2004-08-25
EP1448325B1 EP1448325B1 (en) 2006-03-08

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JP (1) JP2005507781A (en)
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WO2003039779A1 (en) 2003-05-15
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EP1448325B1 (en) 2006-03-08
DE10155233A1 (en) 2003-05-22

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