DE19648926C1 - Moulded body used as screw and kneading element - Google Patents

Moulded body used as screw and kneading element

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Publication number
DE19648926C1
DE19648926C1 DE19648926A DE19648926A DE19648926C1 DE 19648926 C1 DE19648926 C1 DE 19648926C1 DE 19648926 A DE19648926 A DE 19648926A DE 19648926 A DE19648926 A DE 19648926A DE 19648926 C1 DE19648926 C1 DE 19648926C1
Authority
DE
Germany
Prior art keywords
shaped body
body according
particles
oxide
volume
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.)
Expired - Fee Related
Application number
DE19648926A
Other languages
German (de)
Inventor
Manfred Dipl Ing Jaeckel
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.)
JAECKEL, MANFRED, 27612 LOXSTEDT, DE
Original Assignee
Manfred Dipl Ing Jaeckel
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 Manfred Dipl Ing Jaeckel filed Critical Manfred Dipl Ing Jaeckel
Priority to DE19648926A priority Critical patent/DE19648926C1/en
Application granted granted Critical
Publication of DE19648926C1 publication Critical patent/DE19648926C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63468—Polyamides
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • 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
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional steps
    • B22F3/1021—Removal of binder or filler
    • B22F3/1025—Removal of binder or filler not by heating only
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/638—Removal thereof
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor

Abstract

A moulded body made of powdered particles is new, in which the particles are bound together by a highly polymeric polyamide. The body has an open-pored structure.

Description

Beschreibungdescription

Gegenstand der Erfindung sind offenporige Formkörper aus keramischen oder metallischen Pulvern, die als Bindemittel reine hochpolymere Polyamide enthalten, teilweise in Abmischung mit geringen Mengen Wachs und Weichmacher.The invention relates to open-pore shaped articles made of ceramic or metallic Powders containing pure high polymer polyamides as binders, partly in Mix with small amounts of wax and plasticizer.

Durch die DE 44 34 932 A1 sind hochporöse Formteile aus metallischen oder keramischen Teilchen mit anorganischen oder organischen Bindemitteln bekannt, die ohne einen Sinter­ prozeß aufgrund des anorganischen Bindemittels zu hochporösen Formkörpern führen.DE 44 34 932 A1 are highly porous molded parts made of metallic or ceramic Particles with inorganic or organic binders known without a sinter lead to highly porous moldings due to the inorganic binder.

Die Aufgabe der vorliegenden Erfindung bestand darin, poröse metallische oder keramische Formkörper unter ausschließlicher Verwendung von organischen Bindemitteln herzustellen, welche nach der Pyrolyse des Bindemittels zu dichten Formkörpern gesintert werden können.The object of the present invention was to create porous metallic or ceramic To produce molded articles using only organic binders, which can be sintered into dense moldings after the pyrolysis of the binder.

Der Erfindung liegt weiterhin die Aufgabe zugrunde, Formkörper aus sinterfähigen Pulver­ teilchen zu beschreiben, die eine weitere Bearbeitung mit üblichen Zerspanungs- oder Schleifmaschinen zulassen, ohne daß sie durch die dabei auftretenden Kräfte verformt oder zerstört werden.The invention is also based on the object of molded articles made of sinterable powder to describe particles that require further machining with conventional machining or Allow grinding machines without being deformed by the forces or be destroyed.

Polyamide bewirken aufgrund ihrer stark polaren chemischen Struktur hohe Bindungs­ kräfte zu hochpolaren Pulvern wie Metalle oder Metallcarbide und Metallnitride und verleihen den erfindungsgemäßen Formkörpern hohe Festigkeiten, so daß Folien oder Platten großer Abmessungen mit Dicken von nur wenigen Millimetern ohne zu zerbrechen gesintert werden können.Due to their strongly polar chemical structure, polyamides cause high binding forces to highly polar powders such as metals or metal carbides and metal nitrides and impart high strength to the moldings according to the invention, so that films or Panels of large dimensions with thicknesses of just a few millimeters without breaking can be sintered.

Der Erfindung liegt weiterhin die Aufgabe zugrunde, vorzugsweise dickwandige Bauteile zu schaffen, die entweder durch zerspanende Behandlung, oder durch thermoplastische Verformung in die gewünschte Gestalt gebracht werden. Für diese Art der Formgebung wird auf üblichen Kunststoff Verarbeitungsmaschinen eine granulat- oder pulverförmige Formmasse mit der erfindungsgemäßen Bindemittel/Pulverzusammensetzung thermo­ plastisch in einem geeigneten Werkzeug in die gewünschte Form gebracht.The invention is also based on the object, preferably thick-walled components to create, either by machining, or by thermoplastic Deformation can be brought into the desired shape. For this type of shape becomes a granular or powdery on common plastic processing machines Molding composition with the binder / powder composition according to the invention thermo sculpted into the desired shape in a suitable tool.

Diese Formkörper mit Wandstärken von 10 bis 80 mm werden durch Extraktion mit z. B. Aceton vom Wachs/Weichmachergemisch befreit, so daß nach dem Trocknen der erfindungsgemäße Formkörper vorliegt und dichtgesintert werden kann. These moldings with wall thicknesses of 10 to 80 mm are made by extraction with e.g. B. acetone freed from the wax / plasticizer mixture, so that after drying the shaped body according to the invention is present and can be densely sintered.  

Die erfindungsgemäßen Formkörper können beispielsweise plattenförmige Teile mit runder oder rechteckiger Geometrie oder komplexe dickwandige Bauteile wie Schnecken- oder Knetelemente für Extruder und Knetmaschinen darstellen.The moldings according to the invention can, for example, have plate-shaped parts round or rectangular geometry or complex thick-walled components such as screw or represent kneading elements for extruders and kneading machines.

Für den Aufbau der erfindungsgemäßen Formteile werden Pulverteilchen keramischer Werkstoffe insbesondere ausgewählt aus den Verbindungen der Gruppe Al-Oxid, Si-Oxid, Zr-Oxid, SiC, Si-Nitrid und Al-Nitrid.Powder particles become more ceramic for the construction of the molded parts according to the invention Materials selected in particular from the compounds of the group Al oxide, Si oxide, Zr oxide, SiC, Si nitride and Al nitride.

Metallische Pulverteilchen werden insbesondere ausgewählt aus der Gruppe Fe, Co, Ni, W, Mo und Hartmetalle.Metallic powder particles are selected in particular from the group Fe, Co, Ni, W, Mo and hard metals.

Es können auch Mischungen der Pulverkomponenten aus einer oder beiden Werkstoffgruppen eingesetzt werden. Bei den leicht reduzierbaren Elementen wie Fe, Ni, Co, W und Mo können auch die Oxide eingesetzt werden.Mixtures of the powder components from one or both material groups can also be used be used. With the easily reducible elements such as Fe, Ni, Co, W and Mo the oxides can also be used.

Beispiel 1example 1

Eine Hartmetallformmasse mit 54 Vol-% WC/Co-85 : 15,10 Vol-% Polyamid und 36 Vol-% Weichmacher/Wachsgemisch wurde thermoplastisch zu einem Formteil verformt. Nach 24stündiger Lagerung in Aceton bei 35°C waren 32 Vol-% Weichmacher/Wachs­ gemisch entfernt worden. Das Formteil war nach dem Trocknen offenporig und konnte innerhalb von 3 h thermisch vom restlichen Bindemittel befreit und anschließend druck­ los gesintert werden. Die Dichte betrug 98% der theoretischen Dichte.A hard metal molding compound with 54 vol% WC / Co-85: 15.10 vol% polyamide and 36 vol% Plasticizer / wax mixture was thermoplastic molded into a molded part. After Storage in acetone at 35 ° C. for 24 hours was 32% by volume plasticizer / wax mixture has been removed. The molded part was open-pored after drying and was able to The remaining binder is thermally removed within 3 hours and then pressure is applied be sintered. The density was 98% of the theoretical density.

Beispiel 2Example 2

Eine SiC-Formmasse mit 55,5 Vol-% SiC, 11 Vol-% Polyamid und 33,5 Vol-% Weich­ macher/Wachsgemisch wurde thermoplastisch zu einem Formteil verformt. Nach 24­ stündiger Lagerung in Aceton bei 40°C waren 30 Vol-% Weichmacher/Wachsgemisch entfernt worden. Das Formteil war nach dem Trocknen offenporig und konnte innerhalb von 2 h thermisch vom restlichen Bindemittel befreit und anschließend drucklos gesintert werden. Die Dichte betrug 97% der theoretischen Dichte.An SiC molding compound with 55.5% by volume SiC, 11% by volume polyamide and 33.5% by volume soft Macher / wax mixture was thermoplastic molded into a molded part. After 24 hourly storage in acetone at 40 ° C was 30 vol% plasticizer / wax mixture been removed. The molded part was open-pored after drying and was able to within thermally freed from the remaining binder for 2 h and then sintered without pressure will. The density was 97% of the theoretical density.

Claims (6)

1. Formkörper aus pulverförmigen Teilchen, dadurch gekennzeichnet, daß die Teilchen miteinander durch ein hochpolymeres Polyamid gebunden sind, und daß sie eine offenporige Struktur aufweisen.1. Shaped body of powdery particles, characterized in that the particles are bound together by a high polymer polyamide and that they have an open-pore structure. 2. Formkörper nach Anspruch 1, dadurch gekennzeichnet, daß als Teilchen Metalle aus der Gruppe Fe, Co, Ni, W, Mo, Metallcarbide und Hartmetalle verwendet werden.2. Shaped body according to claim 1, characterized in that metals as particles from the group Fe, Co, Ni, W, Mo, metal carbides and hard metals are used. 3. Formkörper nach Anspruch 1, dadurch gekennzeichnet, daß als Teilchen keramische Werkstoffe aus der Gruppe Al-Oxid, Si-Oxid, Zr-Oxid, SiC, Si-Nitrid und Al-Nitrid verwendet werden.3. Shaped body according to claim 1, characterized in that ceramic particles Materials from the group Al oxide, Si oxide, Zr oxide, SiC, Si nitride and Al nitride be used. 4. Formkörper nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß Pulver einer Teilchengröße von 0,0001 bis 0,1 mm verwendet werden.4. Shaped body according to at least one of claims 1 to 3, characterized in that that powders with a particle size of 0.0001 to 0.1 mm are used. 5. Formkörper nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Volumenanteil Polyamid im Formteil zwischen 8 und 20% liegt.5. Shaped body according to at least one of claims 1 to 3, characterized featured, that the volume fraction of polyamide in the molded part is between 8 and 20%. 6. Formkörper nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das offene Porenvolumen durch ein in Aceton extrahierfähiges Weichmacher/ Wachsgemisch entsteht und mindestens 30 Vol-% vom Gesamtvolumen beträgt.6. Shaped body according to at least one of claims 1 to 3, characterized in that that the open pore volume by a plasticizer / extractable in acetone / Wax mixture is formed and amounts to at least 30% by volume of the total volume.
DE19648926A 1996-11-26 1996-11-26 Moulded body used as screw and kneading element Expired - Fee Related DE19648926C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19648926A DE19648926C1 (en) 1996-11-26 1996-11-26 Moulded body used as screw and kneading element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19648926A DE19648926C1 (en) 1996-11-26 1996-11-26 Moulded body used as screw and kneading element

Publications (1)

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DE19648926C1 true DE19648926C1 (en) 1998-01-15

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004067476A1 (en) * 2003-01-30 2004-08-12 Plansee Aktiengesellschaft Method for producing porous sintered bodies
WO2004073908A1 (en) * 2003-02-20 2004-09-02 Plansee Aktiengesellschaft Method for foaming powder-molded bodies comprising a cellular structure
DE102007039246A1 (en) 2007-08-20 2009-02-26 Robert Bosch Gmbh Molding composition and process for the preparation of a molding composition
US20090160105A1 (en) * 2006-07-06 2009-06-25 Plansee Se Process for Producing an Extruded Shaped Body
WO2023021193A1 (en) 2021-08-19 2023-02-23 Headmade Materials Gmbh Binder component for a feedstock compound for use in a shaping and sintering process, particulate feedstock compound, and shaping and sintering process
WO2023021198A1 (en) 2021-08-19 2023-02-23 Headmade Materials Gmbh Binder component for a feedstock compound for use in a shaping and sintering process, particulate feedstock compound, and shaping and sintering process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4434932A1 (en) * 1993-10-02 1995-04-06 Cerasiv Gmbh Moulding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4434932A1 (en) * 1993-10-02 1995-04-06 Cerasiv Gmbh Moulding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004067476A1 (en) * 2003-01-30 2004-08-12 Plansee Aktiengesellschaft Method for producing porous sintered bodies
WO2004073908A1 (en) * 2003-02-20 2004-09-02 Plansee Aktiengesellschaft Method for foaming powder-molded bodies comprising a cellular structure
US20090160105A1 (en) * 2006-07-06 2009-06-25 Plansee Se Process for Producing an Extruded Shaped Body
DE102007039246A1 (en) 2007-08-20 2009-02-26 Robert Bosch Gmbh Molding composition and process for the preparation of a molding composition
WO2023021193A1 (en) 2021-08-19 2023-02-23 Headmade Materials Gmbh Binder component for a feedstock compound for use in a shaping and sintering process, particulate feedstock compound, and shaping and sintering process
WO2023021198A1 (en) 2021-08-19 2023-02-23 Headmade Materials Gmbh Binder component for a feedstock compound for use in a shaping and sintering process, particulate feedstock compound, and shaping and sintering process

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Legal Events

Date Code Title Description
8100 Publication of patent without earlier publication of application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PT + A GMBH POWDER TECHNOLOGIES + ADDITIVES, 0, DE

8381 Inventor (new situation)

Inventor name: JAECKEL, MANFRED, DIPL.-ING., 27612 LOXSTEDT, DE

8327 Change in the person/name/address of the patent owner

Owner name: JAECKEL, MANFRED, 27612 LOXSTEDT, DE

R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20140603