DE1921713A1 - Process for making rods or tubes from powder - Google Patents

Process for making rods or tubes from powder

Info

Publication number
DE1921713A1
DE1921713A1 DE19691921713 DE1921713A DE1921713A1 DE 1921713 A1 DE1921713 A1 DE 1921713A1 DE 19691921713 DE19691921713 DE 19691921713 DE 1921713 A DE1921713 A DE 1921713A DE 1921713 A1 DE1921713 A1 DE 1921713A1
Authority
DE
Germany
Prior art keywords
capsule
cup
lid
opening
powder
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Withdrawn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
DE19691921713
Other languages
German (de)
Other versions
DE1921713B2 (en
Inventor
Sven-Erik Isaksson
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of DE1921713A1 publication Critical patent/DE1921713A1/en
Publication of DE1921713B2 publication Critical patent/DE1921713B2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding 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
    • B22F3/12—Both compacting and sintering
    • B22F3/1208—Containers or coating used therefor
    • B22F3/1258—Container manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/06—Rods, e.g. connecting rods, rails, stakes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/50—Use of fluid pressure in molding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/019—Flexible fluid pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

Verfahren zum Herstellen von Stangen oder Rohren aus PulverProcess for making rods or tubes from powder

Die Erfindung betrifft ein Verfahren zum Herstellen von Formstücken aus Pulver, z.B. von Stangen oder Rohren, bei dem das Pulver mit einer Kapsel umschlossen, diese in eine Hochdruckkammer eingesetzt und einem allseitigen Flüssigkeitsdruck ausgesetzt wird, der das eingeschlossene Pulver zu einem Körper großer Dichte verdichtet. Das so hergestellte Formstück kann z.B. durch Sintern weiterbehandelt werden. Die Kapsel kann aus einer Form aus einem nachgiebigen Material, z.B. Gummi oder Plast, mit mindestens einer Öffnung bestehen, die mit einem dicht schließenden Deckel verschließbar ist. Die Kapsel kann mehrere Male benutzt werden und ist somit nur ein Werkzeug. Bei der Herstellung von rohrförmigen Produkten wird in ein Kapselrohr ein stangenförmiger Kern eingelegt, der vom Deckel an den Rohrenden.zentriert wird.The invention relates to a method for producing shaped pieces from powder, e.g. from rods or tubes, in which the powder is enclosed in a capsule, which is placed in a high-pressure chamber used and exposed to a liquid pressure on all sides, which the enclosed powder into a body large Density compressed. The shaped piece produced in this way can, for example, be further treated by sintering. The capsule can be of a shape consist of a flexible material, e.g. rubber or plastic, with at least one opening that is closed with a tightly fitting Lid is lockable. The capsule can be used several times and is therefore just a tool. In the manufacture of tubular products, a rod-shaped core is inserted into a capsule tube, which is centered by the cover on the tube ends will.

Bei bisher verwendeten Kapseln erhält der fertiggepreßte Körper an den Enden einen etwas größeren Durchmesser, Diese Vergrößerung beruht darauf, daß die an den Kapselenden sitzenden Deckel sehr steif sind und so beim Pressen eine Verlagerung des Pulvers anWith previously used capsules, the finished pressed body is preserved a slightly larger diameter at the ends. This enlargement is due to the fact that the lids at the ends of the capsules are very are stiff and so a displacement of the powder during pressing

—2——2—

0098227170S0098227170S

den Kapselenden eintritt. Gemäß der Erfindung -vermeidet man eine solche Verlagerung des Pulvers dadurch, daß an einem eine Öffnung aufweisenden Ende der Kapsel napfartig so gestaltet wird, daß der Boden des napfartigen Teiles im wesentlichen in der Ebene der Öffnung der Kapsel liegt»und daß zum Verschließen der Öffnung im Boden des napfförmig erweiterten Teiles der Kapsel ein konischer und vorzugsweise napfförmiger Deckel eingelegt wird, dessen Mantel einen größeren Winkel mit dem Deckelboden bildet als der Mantel der napfförmigen Erweiterung der Kapsel mit der Ebene ihrer Öffnung. Zwischen dem Mantel des Deckels, dem ringförmigen Boden und dem Mantel der Erweiterung der Kapsel entsteht so ein ringförmiger Raum mit vorzugsweise dreieckigem
Querschnitt. Bei dieser Gestaltung der Kapsel und des Deckels
kann der ringförmige Boden der Erweiterung ziemlich unbehindert am Boden des Deckels gleiten, wenn das Pulver unter der Einwirkung des Flüssigkeitsdruckes verdichtet und somit der Durchmesser des Formstückes kleiner wird.enters the capsule ends. According to the invention, such a displacement of the powder is avoided by designing a cup-like end of the capsule having an opening so that the bottom of the cup-like part lies essentially in the plane of the opening of the capsule »and for closing the opening In the bottom of the cup-shaped widened part of the capsule, a conical and preferably cup-shaped cover is inserted, the jacket of which forms a larger angle with the cover base than the jacket of the cup-shaped extension of the capsule with the plane of its opening. An annular space, preferably triangular, is thus created between the jacket of the lid, the annular base and the jacket of the extension of the capsule
Cross-section. In this design the capsule and the lid
the annular base of the enlargement can slide fairly unhindered on the base of the lid when the powder compacts under the action of the liquid pressure and thus the diameter of the shaped piece becomes smaller.

* Die Erfindung ist im folgenden anhand der Zeichnung näher beschrieben, in dieser zeigen :* The invention is described in more detail below with reference to the drawing, in this show:

Fig. 1 und 2 eine Kapsel üblicher Art vor bzw. nach derFig. 1 and 2 a capsule of the usual type before and after

Verdichtung undCompression and

Fig. 3 und 4 'eine erfindungsgemäße, für die Herstellung
von Stangen bestimmte Kapsel vor bzw. nach der
Verdichtung.Fig. 3 and 4 'an inventive, for the production
from rods certain capsule before or after the
Compression.

009822/170S009822 / 170S

In Fig. 1 und 2 bezeichnet 1 ein Rohr aus nachgiebigem Material und 2 einen Deckel, der das Rohr 1 so verschließt, daß eine dichte Kapsel erhalten wird. Die Kapsel wird mit einem Pulver gefüllt, das bei der Verdichtung einen festen Körper 4 mit beträchtlich reduziertem Durchmesser bildet. An den Enden der Kapsel bekommt die fertige Stange einen größeren Durchmesser als im übrigen und muß deswegen durch Nachbearbeitung auf das • richtige Maß gebracht werden.In Fig. 1 and 2, 1 denotes a tube made of resilient material and 2 a cover which closes the tube 1 so that a tight capsule is obtained. The capsule is filled with a powder, which when compressed a solid body 4 with considerably reduced diameter forms. The finished rod has a larger diameter at the ends of the capsule than for the rest and must therefore be brought to the right level by post-processing.

In Fig. 3 und 4 bezeichnet 5 ein Rohr aus nachgiebigem Material, das an seinen Enden einen im Durchmesser größeren Teil 6 hat. Zwischen beiden Teilen 5 und 6 bildet das Rohr eine ringförmige Schulter 7, die im wesentlichen winkelrecht zur Längsachse des Rohres ist, also in der Ebene der Öffnung de.s. Rohres liegt. Der Deckel 8 ist kegelartig ausgebildet, der Kegelmantel 9 bildet einen Winkel CA mit einer zur Längsachse des Rohres winkelrechten Ebene. Der Winkel cK soll größer als 45°, vorzugsweise größer als 60 sein. Die Kapsel ist mit Pulver 10 gefüllt, das durch Verdichtung zu einem Pulverkörper 11 gepreßt wird»In Fig. 3 and 4, 5 denotes a tube made of resilient material, which has a larger diameter portion 6 at its ends. Between the two parts 5 and 6, the tube forms an annular shoulder 7 which is essentially at right angles to the longitudinal axis of the tube, i.e. in the plane of the opening de.s. Rohres lies. The cover 8 is conical, the conical shell 9 forms an angle CA with a plane at right angles to the longitudinal axis of the pipe. The angle cK should be greater than 45 °, preferably greater than 60. The capsule is filled with powder 10, which is compressed into a powder body 11 »

Da der ringförmige Teil 7 des Rohres am Boden des Deckels 8 gleiten kann, wird das Rohr 5 an seinen Enden beinahe ebenso leicht wie in der Mitte deformiert, wodurch die bei der bisher benutzten Kapsel unvermeidliche Vergrößerung an den Enden des fertigen Pulverkörpers und die Nachbearbeitung der Stange vermieden werden.Since the annular part 7 of the tube can slide on the bottom of the lid 8, the tube 5 becomes almost the same at its ends slightly deformed in the middle, as a result of which the inevitable enlargement of the capsule at the ends of the finished powder body and the post-processing of the rod avoided will.

009822/1705009822/1705

Das Beispiel "bezieht sich auf die Herstellung einer kreisförmigen Stange, aber das Verfahren ist ebenso gut anwendbar bei der Herstellung von Stangen mit einem anderen Querschnitt, bei Herstellung von Rohren oder von unregelmäßigen Formeinzelnteilen. Viele Variationen des Verfahrens sind somit im Rahmen der Erfindung denkbar.The example "refers to making a circular Rod, but the method is equally applicable to the manufacture of rods with a different cross-section, during manufacture of pipes or irregular shaped parts. Many variations of the method are thus within the scope of the invention conceivable.

-5--5-

009822/1705009822/1705

Claims (3)

Patentansprüche ;Claims; M. J Verfahren zum Herstellen von Formstücken aus Pulver, "bei denen das Pulver in einer Kapsel aus nachgiebigem Material mit mindestens einer mit einem Deckel verschlossenen Öffnung eingeschlossen und hydrostatisch verdichtet wird, dadurch gekennzeichnet, daß die Kapsel an einem eine Öffnung aufweisenden Ende der Kapsel napfartig so gestaltet wird, daß der Boden des napfartigen Teiles im wesentlichen in der Ebene der Öffnung der Kapsel liegt, und daß zum Verschließen der Öffnung im Boden des napfförmig erweiterten Teiles der Kapsel ein konischer und vorzugsweise napfförmiger Deckel eingelegt wird, dessen Mantel einen größeren Winkel mit dem Deckel"boden bildet als der Mantel der napfförmigen Erweiterung der Kapsel mit der Ebene ihrer Öffnung, so daß nach dem Einsetzen des Deckels in die napffö'rmige Erweiterung der Kapsel zwischen beiden ein Ringraum mit vorzugsweise dreieckigem Querschnitt verbleibt.M. J Process for the production of shaped pieces from powder, "bei where the powder is enclosed in a capsule made of flexible material with at least one opening closed with a lid and is hydrostatically compressed, characterized in that the capsule at one having an opening The end of the capsule is designed cup-like so that the bottom of the cup-like part is substantially in the plane of the opening of the Capsule is, and that to close the opening in the bottom of the cup-shaped widened part of the capsule is a conical and preferably Cup-shaped lid is inserted, the jacket of which forms a larger angle with the cover "bottom" than the jacket the cup-shaped extension of the capsule with the plane of its Opening so that after the lid has been inserted into the cup-shaped Extension of the capsule between the two remains an annular space with a preferably triangular cross-section. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Durchmesser des Bodens des napfförmig erweiterten Teiles der Kapsel so viel größer als der Durchmesser des Deckelbodens gewählt wird, wie der Durchmesserabnahme des Formstückes beim Verdichten entspricht.2. The method according to claim 1, characterized in that the diameter of the bottom of the cup-shaped widened part of the Capsule is chosen to be so much larger than the diameter of the lid base, as the diameter decrease of the molded piece Compress corresponds. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Mantel des Deckels mit dem Boden des Deckels einen Winkel zwischen 120 bis 135° einschließt, vorzugsweise etwas kleiner als 120°.3. The method according to claim 1, characterized in that the jacket of the lid with the bottom of the lid at an angle between Includes 120 to 135 °, preferably slightly less than 120 °. 009822/170S009822 / 170S LeerseiteBlank page
DE19691921713 1968-05-02 1969-04-29 DEVICE FOR THE PRODUCTION OF MOLDED PIECES FROM POWDER Withdrawn DE1921713B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE5908/68A SE309293B (en) 1968-05-02 1968-05-02

Publications (2)

Publication Number Publication Date
DE1921713A1 true DE1921713A1 (en) 1970-05-27
DE1921713B2 DE1921713B2 (en) 1971-04-08

Family

ID=20267502

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691921713 Withdrawn DE1921713B2 (en) 1968-05-02 1969-04-29 DEVICE FOR THE PRODUCTION OF MOLDED PIECES FROM POWDER

Country Status (5)

Country Link
US (1) US3608026A (en)
JP (1) JPS4911964B1 (en)
DE (1) DE1921713B2 (en)
GB (1) GB1255835A (en)
SE (1) SE309293B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862286A (en) * 1972-10-10 1975-01-21 Aluminum Co Of America Method of fabricating compacted powdered metal extrusion billets
US3868225A (en) * 1973-05-25 1975-02-25 Safety Lab Inc Sodium chlorate oxygen producing apparatus
US4370294A (en) * 1981-01-05 1983-01-25 Western Electric Co., Inc. Compacting particulate material into a body
US4395219A (en) * 1981-01-05 1983-07-26 Western Electric Co., Inc. Apparatus for forming compactible material into a body
SE435353B (en) * 1982-11-09 1984-09-24 Cold Isostatic Press Syst Kb DEVICE FOR COMPENSATING AXIAL TENSION OF AN ISOSTATIC PRESSURE
US6280662B1 (en) * 1994-07-22 2001-08-28 Raytheon Company Methods of fabrication of ceramic wafers
CN105478756A (en) * 2014-09-17 2016-04-13 宁波江丰电子材料股份有限公司 Ti-A1 alloy forming method

Also Published As

Publication number Publication date
SE309293B (en) 1969-03-17
GB1255835A (en) 1971-12-01
US3608026A (en) 1971-09-21
DE1921713B2 (en) 1971-04-08
JPS4911964B1 (en) 1974-03-20

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Legal Events

Date Code Title Description
SH Request for examination between 03.10.1968 and 22.04.1971
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee