DE883828C - Process for the production of molded articles - Google Patents

Process for the production of molded articles

Info

Publication number
DE883828C
DE883828C DEW2615D DEW0002615D DE883828C DE 883828 C DE883828 C DE 883828C DE W2615 D DEW2615 D DE W2615D DE W0002615 D DEW0002615 D DE W0002615D DE 883828 C DE883828 C DE 883828C
Authority
DE
Germany
Prior art keywords
sintered
sintering
filled
pressed
molded body
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
Application number
DEW2615D
Other languages
German (de)
Inventor
Franz Dr Skaupy
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.)
Deutsche Edelstahlwerke AG
Original Assignee
Deutsche Edelstahlwerke AG
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 Deutsche Edelstahlwerke AG filed Critical Deutsche Edelstahlwerke AG
Priority to DEW2615D priority Critical patent/DE883828C/en
Application granted granted Critical
Publication of DE883828C publication Critical patent/DE883828C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers

Description

Verfahren zur Herstellung von Formkörpern Die Erfindung betrifft ein Verfahren zur Herstellung von Formkörpern durch Ansintern von Formkörperteilen an vorher durch Sintern hergestellte Formkörperteile. Sie besteht darin, daß in einer den ganzen Formkörper einhüllenden Preßform die den anzusinternden Teilen entsprechenden Hohlräume zunächst durch Hilfskörper ausgefüllt werden. Darauf wird der dem zuerst zu sinternden Formkörperteil entsprechende Hohlraum mit Metallpulver gefüllt, die Füllung gepre:ßt und gegebenenfalls vorgesintert. Alsdann werden die den anzusinternden Teilen entsprechenden Hohlräume nacheinander durch Entfernen der Hilfskörper freigelegt, mit 'Metallpulver gefüllt, deren Füllungen gepreßt und gegebenenfalls vorgesintert, und schließlich wird der ganze Körper in oder außerhalb der Form einer gemeinsamen Sinterung oder Fertigsinterung unterworfen.Process for the production of moldings The invention relates to a Process for the production of moldings by sintering moldings on molded body parts previously produced by sintering. It consists in that in one the entire molding enveloping the mold corresponding to the parts to be sintered on Cavities are initially filled with auxiliary bodies. Then that will be the first to be sintered molded body part corresponding cavity filled with metal powder, the Filling pressed and possibly pre-sintered. Then they become those to be sintered Share corresponding cavities one after the other uncovered by removing the auxiliary body, filled with metal powder, the fillings pressed and possibly pre-sintered, and finally the whole body becomes in or out of the shape of a common Subject to sintering or final sintering.

Man hat zwar bereits Verbundkörper durch gleichzeitiges Sintern mehrerer verschiedenerMetallpulver, um z. B. Bi-Metalle zu erzeugen, oder aber durch Ansintern von Schichten an einen vorher durch Sintern hergestellten Körper erzeugt.One already has composite bodies by sintering several at the same time various metal powders, e.g. B. to produce bi-metals, or by sintering generated by layers on a body previously produced by sintering.

Gegenüber diesen Arbeitsweisen wird durch die neue Erfindung die Möglichkeit geboten, verhältnismäßig verwickelte, zusammengesetze Formkörper in bequemer Weise herzustellen und jeden einzelnen Teil des Körpers entsprechend dem dazu verwendeten Metallpulver individuell bezüglich der Pressung und Sinterung zu behandeln. Als Beispiel sei.. die Herstellung eines aus drei oder mehr Schichten bestehenden Sinterlagers beschrieben: In einen Hohlzylinder ist ein axialer herausnehmbarer Kern eingesetzt mit einem Durchmesser entsprechend,,dem inneren Durchmesser des Lagezs, konzentrisch dazu sind zwei hohlzylindrische Kerne vorgesehen, die nach außen einen ringförmigen Raum frei lassen, in den Kupferpulver eingefüllt wird,das alsdann gepreßt wird. Hierauf wird der äußere ringförrnige Kern herausgezogen und der dadurch entstandene Hohlraum mit einer Mischung von Kupferpulver mit 2o '/o Bleipulver gefüllt, die wieder gepreßt wird, dann wird der innere ringförmige Kern herausgenommen. In die so entstandene Höhlung kommt nun eine Mischung von Kupferpulver mit 4.5 % Bleipulver; die der eigentlichen Lauffläche des Lagers entspricht. Nachdem auch diese Schicht gepreßt worden ist, wird der Innenkern herausgenommen. und der dreiteilige Pre@ßkörper aus der Form entfernt und gesintert.In contrast to these modes of operation, the new invention makes it possible required, relatively intricate, composite moldings in a convenient manner and every single part of the body according to the one used for it Treat metal powder individually with regard to pressing and sintering. as Example is .. the Making one from three or more layers Existing sintered bearing described: In a hollow cylinder is an axial removable one Core inserted with a diameter corresponding to, the inner diameter of the Lagezs, two hollow cylindrical cores are provided concentrically to it, which according to Leave a ring-shaped space on the outside into which copper powder is poured, the then is pressed. Then the outer ring-shaped core is pulled out and the resulting cavity with a mixture of copper powder at 20% Lead powder filled, which is pressed again, then the inner annular core taken out. A mixture of copper powder is then put into the cavity that has been created with 4.5% lead powder; which corresponds to the actual running surface of the bearing. After this this layer has also been pressed, the inner core is removed. and the three-part compacts removed from the mold and sintered.

Ein weiteres Beispiel soll die Herstellung eines Schlagbohrers veranschaulichen.Another example is intended to illustrate the manufacture of a hammer drill.

In eine zylindrische Form werden am Umfang vier gleichmäßig verteilte Hilfskörper eingefügt und der übrigbleibende Raum mit Stahlpulver ausgefüllt, das zusammengepreßt wird. Darauf werden die Hilfskörper der Reihe nach entfernt, an ihrer Stelle eine Hartmetallmischung_ eingefüllt, gepreßt und sodann -der aus Eisen und mehreren Hartmetallteilen bestehende Verbundkörper - fertig gesintert.In a cylindrical shape, four evenly distributed around the circumference Auxiliary body inserted and the remaining space filled with steel powder, the is compressed. Then the auxiliary bodies are removed one after the other, on In their place a hard metal mixture is filled in, pressed and then made of iron and composite bodies consisting of several hard metal parts - completely sintered.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Formkörpern durch Ansintern von Formkörperteilen an vorher durch Sintern hergestellte Formkörperteile, dadurch gekennzeichnet, daß in einer den ganzen Formkörper einhüllenden Preßform die den anzusinternden Teilen entsprechenden Hohlräume zunächst durch Hilfskörper ausgefüllt werden, darauf der dem zuerst zu sinternden Formkörperteil entsprechende Hohlraum mit Metallpulver gefüllt, die Füllung gepreßt und gegebenenfalls vorgesintert wird, alsdann die den anzusinternden Teilen entsprechenden Hohlräume nacheinander durch Entfernen der Hilfskörper freibelegt, mit Metallpulver gefüllt, deren Füllungen gepreßt und gegebenenfalls vorgesintert werden und schließlich der ganze Körper in öder außerhalb ,der Form einer gemeinsamen Sinterung oder Fertigsinterung unterworfen wird. Angezogene Druckschriften: Deutsche Patentschriften Nr. 6115t2.62, 6a8oö3, 673 8'I4.PATENT CLAIM: Process for the production of moldings by sintering from molded body parts to molded body parts previously produced by sintering, thereby characterized in that in a mold enveloping the whole molding the the Corresponding cavities to be sintered on are initially filled by auxiliary bodies thereupon the cavity corresponding to the molded body part to be sintered first filled with metal powder, the filling is pressed and, if necessary, pre-sintered, then the cavities corresponding to the parts to be sintered through one after the other Remove the auxiliary body exposed, filled with metal powder, their fillings pressed and possibly pre-sintered and finally the whole body in or outside, subject to the form of a joint sintering or final sintering will. Attached publications: German patent specifications No. 6115t2.62, 6a8oö3, 673 8'I4.
DEW2615D 1938-05-31 1938-05-31 Process for the production of molded articles Expired DE883828C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW2615D DE883828C (en) 1938-05-31 1938-05-31 Process for the production of molded articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW2615D DE883828C (en) 1938-05-31 1938-05-31 Process for the production of molded articles

Publications (1)

Publication Number Publication Date
DE883828C true DE883828C (en) 1953-07-20

Family

ID=7591688

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW2615D Expired DE883828C (en) 1938-05-31 1938-05-31 Process for the production of molded articles

Country Status (1)

Country Link
DE (1) DE883828C (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE615262C (en) * 1934-01-24 1935-07-01 Fried Krupp Akt Ges Drawing die made from a hard metal alloy
DE618063C (en) * 1930-01-18 1935-09-02 I G Farbenindustrie Akt Ges Process for the production of composite metals
DE673814C (en) * 1934-09-11 1939-03-29 Heraeus Vacuumschmelze Akt Ges Process for the production of sintered hard metal bodies

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE618063C (en) * 1930-01-18 1935-09-02 I G Farbenindustrie Akt Ges Process for the production of composite metals
DE615262C (en) * 1934-01-24 1935-07-01 Fried Krupp Akt Ges Drawing die made from a hard metal alloy
DE673814C (en) * 1934-09-11 1939-03-29 Heraeus Vacuumschmelze Akt Ges Process for the production of sintered hard metal bodies

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