DE2601760C2 - Method of making an electric heater - Google Patents

Method of making an electric heater

Info

Publication number
DE2601760C2
DE2601760C2 DE19762601760 DE2601760A DE2601760C2 DE 2601760 C2 DE2601760 C2 DE 2601760C2 DE 19762601760 DE19762601760 DE 19762601760 DE 2601760 A DE2601760 A DE 2601760A DE 2601760 C2 DE2601760 C2 DE 2601760C2
Authority
DE
Germany
Prior art keywords
cladding tube
metal powder
making
hammering
sintered
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
DE19762601760
Other languages
German (de)
Other versions
DE2601760B1 (en
Inventor
Nikolaus Dipl.-Phys 6483 Salmünster; Krupka Manfred Ing. Neimanns (grad.), 6480 Wächtersbach
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.)
Conti Elektra Heizelemente 6483 Bad Soden-Sa GmbH
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DE19762601760 priority Critical patent/DE2601760C2/en
Publication of DE2601760B1 publication Critical patent/DE2601760B1/en
Application granted granted Critical
Publication of DE2601760C2 publication Critical patent/DE2601760C2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/52—Apparatus or processes for filling or compressing insulating material in tubes

Landscapes

  • Powder Metallurgy (AREA)
  • Resistance Heating (AREA)

Description

26 Ol 76026 Ol 760

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zum Herstellen einer elektrischen Heizvorrichtung, bei dem ein elektrisches Heizelement, bestehend aus einem elektrischen Widerstand, einer Isoliermasse und einem Mantel, in ein Hüllrohr eingelegt und die verbleibenden Hohlräume im Hüllrohr mit einem Metallpulver hoher thermischer Leitfähigkeit ausgefüllt werden, das nach dem Einbringen in das Hüllrohr verdichtet und anschließend gesintert wird, dadurch gekennzeichnet, daß das Metallpulver (6) vor dem Einfüllen in das Hüllrohr (5) aus Korngrößen zusammengemischt wird, die eine hohe Fülldichte im Hüllrohr (5) ergeben und daß das Metallpulver vor dem Sintern durch Hämmern, Walzen od. dgl. des Hüllrohres (5) verdichtet wird, das zum Ausgleichen eines beim Metallpulver (6) durch das Sintern eingetretenen Schwundes eine weitere Durchmesserverringerung durch Hämmern oder Walzen erfährt.1. A method of manufacturing an electrical heating device, in which an electrical heating element, consisting of an electrical resistor, an insulating compound and a jacket, in a cladding tube inserted and the remaining cavities in the cladding tube with a metal powder high thermal Conductivity are filled, which is compressed after being introduced into the cladding tube and then is sintered, characterized in that the metal powder (6) prior to filling in the cladding tube (5) is mixed together from grain sizes that have a high filling density in the cladding tube (5) and that the metal powder prior to sintering by hammering, rolling or the like of the cladding tube (5) is compressed, which has occurred to compensate for a metal powder (6) caused by the sintering Shrinkage is further reduced in diameter by hammering or rolling. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Metallpulver (6) durch Aufheizen des Heizelementes (1) und/oder durch externe Beheizung des Hüllrohres (5) gesintert wird.2. The method according to claim 1, characterized in that the metal powder (6) by heating of the heating element (1) and / or by external heating of the cladding tube (5) is sintered.
DE19762601760 1976-01-19 1976-01-19 Method of making an electric heater Expired DE2601760C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762601760 DE2601760C2 (en) 1976-01-19 1976-01-19 Method of making an electric heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762601760 DE2601760C2 (en) 1976-01-19 1976-01-19 Method of making an electric heater

Publications (2)

Publication Number Publication Date
DE2601760B1 DE2601760B1 (en) 1977-05-18
DE2601760C2 true DE2601760C2 (en) 1977-12-29

Family

ID=5967714

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762601760 Expired DE2601760C2 (en) 1976-01-19 1976-01-19 Method of making an electric heater

Country Status (1)

Country Link
DE (1) DE2601760C2 (en)

Also Published As

Publication number Publication date
DE2601760B1 (en) 1977-05-18

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8327 Change in the person/name/address of the patent owner

Owner name: CONTI ELEKTRA HEIZELEMENTE GMBH, 6483 BAD SODEN-SA

8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee