DE19804714A1 - Product manufacturing method producing patterns for immediate use or for positive or negative patterns for production of further heating plastic coated particles - Google Patents

Product manufacturing method producing patterns for immediate use or for positive or negative patterns for production of further heating plastic coated particles

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Publication number
DE19804714A1
DE19804714A1 DE19804714A DE19804714A DE19804714A1 DE 19804714 A1 DE19804714 A1 DE 19804714A1 DE 19804714 A DE19804714 A DE 19804714A DE 19804714 A DE19804714 A DE 19804714A DE 19804714 A1 DE19804714 A1 DE 19804714A1
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DE
Germany
Prior art keywords
particles
patterns
coated particles
plastic
production
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.)
Withdrawn
Application number
DE19804714A
Other languages
German (de)
Inventor
Johannes Prof Dr Rer N Gartzen
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Individual
Original Assignee
Individual
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.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to DE19804714A priority Critical patent/DE19804714A1/en
Publication of DE19804714A1 publication Critical patent/DE19804714A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

The product comprising bonded particles is subsequently pressed under hot isostatic conditions to evaporate the plastic and compress the product, the shrinkage being calculated beforehand, to ensure that the final product is the correct size after releasing the pressure. Preferred Features: Coated particles may be heated in layers by a laser beam. The final compressed product can be used as a mold or former for producing other items. Particles may have cores of different materials.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Körpers, bei dem eine Menge mit Kunststoff umhüllter Partikel an definierten Stellen erwärmt wird, damit die Partikel zu einem Körper verkleben.The invention relates to a method for producing a body, in which a Quantity of plastic-coated particles is heated at defined points, so that the particles stick to a body.

Derartige Verfahren sind unter Verwendung von mit Kunststoff umhüllten Metallpartikel bekannt. Hierbei werden mittels eines Lasersinterverfahrens Kunststoff umhüllte Metallpartikel zu einer bestimmten Form verbacken. Anschließend wird mit Wärme der Kunststoff verdampft und die entstehenden Hohlräume werden mit einer flüssigen Metallschmelze ausgefüllt, die aufgrund von Kapillarkräften in die während der Verdampfung entstehenden Hohlräume eindringt und erstarrt.Such methods are using plastic-encased Known metal particles. Here, using a laser sintering process Bake plastic-coated metal particles into a specific shape. Then the plastic is evaporated with heat and the resulting Cavities are filled with a molten metal that is due to of capillary forces in the cavities created during evaporation penetrates and freezes.

Die dabei entstehenden Körper sind aus verschiedenen Metallen und die Festigkeit der Körper ist relativ gering.The resulting bodies are made of different metals and the Body strength is relatively low.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, das gattungsgemäße Verfahren derart weiterzuentwickeln, daß feste in der Praxis einsetzbare Körper entstehen.The present invention is therefore based on the object to further develop generic methods such that solid in practice usable bodies arise.

Diese Aufgabe wird dadurch gelöst, daß der beim gattungsgemäßen Verfahren hergestellte Körper anschließend heiß isostatisch gepreßt wird. This object is achieved in that in the generic method manufactured body is then hot isostatically pressed.  

Das heißisostatische Pressen ist ein Preßvorgang in einer Druckkammer unter Wärmezufuhr. Die Wärme führt dazu, daß der die Partikel umhüllende Kunststoff verdampft und der hohe Druck bewirkt eine Komprimierung des Körpers, die zu einer Verbindung der Partikel führt. Nach Abkühlung und Entspannung des Druckes kann der Körper aus der Druckkammer entnommen werden. Der dabei entstandene Körper besteht ausschließlich aus dem Material der eingesetzten Partikel und ist daher direkt für unterschiedlichste praktische Einsätze verwendbar.Hot isostatic pressing is a pressing process in a pressure chamber Heat supply. The heat leads to the plastic enveloping the particles evaporates and the high pressure causes the body to compress, which too a connection of the particles. After cooling and relaxing the Pressure, the body can be removed from the pressure chamber. The one there The resulting body consists exclusively of the material used Particles and is therefore direct for a wide variety of practical uses usable.

Das heißisostatische Pressen führt zu einer Komprimierung des Körpers und somit zu einer Verkleinerung dessen Abmessungen. Es wird daher vorgeschlagen, daß die beim heißisostatischen Pressen entstehende Schrumpfung vorher berechnet wird und der Körper mit entsprechend größeren Abmessungen hergestellt wird.The hot isostatic pressing leads to compression of the body and thus reducing its dimensions. It is therefore suggested that the shrinkage occurring during hot isostatic pressing is calculated beforehand and the body is made with correspondingly larger dimensions.

Je nach gewünschter Form gibt es verschiedene Arten, die Menge mit Kunststoff umhüllter Partikel an definierten Stellen zu erwärmen. Vorzugsweise werden die mit Kunststoff umhüllten Partikel jedoch schichtweise erwärmt, da dieses Verfahren die Herstellung unterschiedlichster Formen erlaubt.Depending on the desired shape, there are different types, the amount with plastic to heat coated particles at defined points. Preferably the Particles coated with plastic, however, are heated in layers as this Process allows the production of different shapes.

Vorteilhaft ist es, wenn die Partikel mittels Laserstrahl erwärmt werden, da der ortsgenau einsetzbare Laserstrahl eine Erwärmung auf kleinstem Raum ermöglicht und somit die Voraussetzung für die Herstellung fein strukturierter Körper bildet.It is advantageous if the particles are heated by means of a laser beam, since the Laser beam that can be used in a precise manner enables heating in a very small space and thus forms the basis for the production of finely structured bodies.

Der heißisostatisch gepreßte Körper kann direkt als Modell verwendet werden oder als Positiv- oder Negativform der Herstellung weiterer Körper dienen. The hot isostatically pressed body can be used directly as a model or serve as a positive or negative form of the production of further bodies.  

Die Grundvariante des Verfahrens sieht vor, daß die Partikel einen Metallkern aufweisen, der mit einem leicht verdampfbaren Kunststoff umhüllt ist. Anstelle eines Metallkerns kann jedoch auch ein Keramikkern eingesetzt werden. Darüber hinaus ist es auch möglich, Kerne aus verschiedenen Materialien zu verwenden, sofern diese Materialien sich im heißisostatischen Preßvorgang miteinander verbinden. Gerade die Verwendung verschiedener Materialien ermöglicht die Herstellung von Modellen aus neuartigen Werkstoffen und die Verwendung unterschiedlicher Materialien kann das Verbinden der Kernmaterialien während des heißisostatischen Pressens begünstigen.The basic variant of the method provides that the particles have a metal core have, which is covered with an easily evaporable plastic. Instead of of a metal core, however, a ceramic core can also be used. About that it is also possible to use cores made of different materials, if these materials are in the hot isostatic pressing process with each other connect. The use of different materials makes it possible Manufacture of models from novel materials and use different materials can be used while joining the core materials of hot isostatic pressing.

Bei einem Ausführungsbeispiel des erfindungsgemäßen Verfahrens wird der Körper in einem Lasersinterverfahren aus mit Kunststoff umhüllten Metallpartikeln hergestellt. Dieser Körper wird anschließend in einer Druckkammer isostatisch gepreßt. Das Programm zur Laserführung des Lasersinterverfahrens wird dabei um einen Programmbaustein erweitert, der in Abhängigkeit der verwendeten Materialien die Schrumpfung des Körpers beim isostatischen Pressen berechnet und die vorgegebene Form des herzustellenden Körpers um den Schrumpfungsanteil vergrößert.In one embodiment of the method according to the invention Body in a laser sintering process made of plastic Made of metal particles. This body is then in one Pressure chamber pressed isostatically. The laser guidance program of the Laser sintering is expanded by a program module, which is in Depending on the materials used, the shrinkage of the body when isostatic presses calculated and the predetermined shape of the to be manufactured Body enlarged by the amount of shrinkage.

Claims (8)

1. Verfahren zur Herstellung eines Körpers, bei dem eine Menge mit Kunststoff umhüllter Partikel an definierten Stellen erwärmt wird, damit die Partikel zu einem Körper verkleben, dadurch gekennzeichnet, daß anschließend der Körper heißisostatisch gepreßt wird.1. A method for producing a body in which a quantity of plastic-coated particles is heated at defined points so that the particles stick to a body, characterized in that the body is then hot isostatically pressed. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die beim heißisostatischen Pressen entstehende Schrumpfung vorher berechnet wird und der Körper mit entsprechend größeren Abmessungen hergestellt wird.2. The method according to claim 1, characterized in that the at hot isostatic presses resulting shrinkage is calculated beforehand and the body is made with correspondingly larger dimensions. 3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die mit Kunststoff umhüllten Partikel schichtweise erwärmt werden.3. The method according to any one of the preceding claims, characterized characterized in that the plastic-coated particles in layers be heated. 4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die mit Kunststoff umhüllten Partikel mittels Laserstrahl erwärmt werden.4. The method according to any one of the preceding claims, characterized characterized in that the plastic-coated particles by means of Laser beam can be heated. 5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der heißisostatisch gepreßte Körper als Form verwendet wird.5. The method according to any one of the preceding claims, characterized characterized in that the hot isostatically pressed body as a shape is used. 6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Partikel einen Metallkern aufweisen. 6. The method according to any one of the preceding claims, characterized characterized in that the particles have a metal core.   7. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Partikel einen Keramikkern aufweisen.7. The method according to any one of claims 1 to 5, characterized in that that the particles have a ceramic core. 8. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Partikel Kerne aus verschiedenen Materialien aufweisen.8. The method according to any one of claims 1 to 5, characterized in that the particles have cores made of different materials.
DE19804714A 1998-02-06 1998-02-06 Product manufacturing method producing patterns for immediate use or for positive or negative patterns for production of further heating plastic coated particles Withdrawn DE19804714A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19804714A DE19804714A1 (en) 1998-02-06 1998-02-06 Product manufacturing method producing patterns for immediate use or for positive or negative patterns for production of further heating plastic coated particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19804714A DE19804714A1 (en) 1998-02-06 1998-02-06 Product manufacturing method producing patterns for immediate use or for positive or negative patterns for production of further heating plastic coated particles

Publications (1)

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DE19804714A1 true DE19804714A1 (en) 1999-08-12

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DE19804714A Withdrawn DE19804714A1 (en) 1998-02-06 1998-02-06 Product manufacturing method producing patterns for immediate use or for positive or negative patterns for production of further heating plastic coated particles

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2006066A1 (en) * 1969-03-03 1971-02-04 Allmanna Svenska Elektnska Aktie bolaget, Vasteras (Schweden) Process for sintering powder bodies and furnace for carrying out the process
DE2616704B2 (en) * 1975-04-16 1978-04-20 Produits Chimiques Ugine Kuhlmann, Paris Process for the production of molded articles from polytetrafluoroethylene
US4579703A (en) * 1981-03-10 1986-04-01 Asea Aktiebolag Method of manufacturing articles of ceramic material
DE3807853C1 (en) * 1988-03-10 1989-08-10 Nukem Gmbh, 6450 Hanau, De
CH681516A5 (en) * 1989-09-13 1993-04-15 Asea Brown Boveri
EP0601397A1 (en) * 1992-12-11 1994-06-15 Hoechst Aktiengesellschaft Method for producing shaped bodies from ultrahigh molecular weight polyethylene
DE4225623C2 (en) * 1992-08-03 1994-06-30 Karl Hehl Process for the production of a powdery injection molding compound for the production of porcelain and its use
DE4311873A1 (en) * 1993-04-10 1994-10-13 Karl Hehl Process for producing ceramic articles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2006066A1 (en) * 1969-03-03 1971-02-04 Allmanna Svenska Elektnska Aktie bolaget, Vasteras (Schweden) Process for sintering powder bodies and furnace for carrying out the process
DE2616704B2 (en) * 1975-04-16 1978-04-20 Produits Chimiques Ugine Kuhlmann, Paris Process for the production of molded articles from polytetrafluoroethylene
US4579703A (en) * 1981-03-10 1986-04-01 Asea Aktiebolag Method of manufacturing articles of ceramic material
DE3807853C1 (en) * 1988-03-10 1989-08-10 Nukem Gmbh, 6450 Hanau, De
CH681516A5 (en) * 1989-09-13 1993-04-15 Asea Brown Boveri
DE4225623C2 (en) * 1992-08-03 1994-06-30 Karl Hehl Process for the production of a powdery injection molding compound for the production of porcelain and its use
EP0601397A1 (en) * 1992-12-11 1994-06-15 Hoechst Aktiengesellschaft Method for producing shaped bodies from ultrahigh molecular weight polyethylene
DE4311873A1 (en) * 1993-04-10 1994-10-13 Karl Hehl Process for producing ceramic articles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SEILSTORFER,Helmut, MOSER,Gerhard: Die heißisostatische Preßtechnik (HIP) - Teil I. In: METALL, 34.Jg., H.10, Okt. 1980, S.925-929 *

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