DE1863679U - ELECTRIC HEATING DEVICE FOR RECIPIENTS. - Google Patents

ELECTRIC HEATING DEVICE FOR RECIPIENTS.

Info

Publication number
DE1863679U
DE1863679U DEB49519U DEB0049519U DE1863679U DE 1863679 U DE1863679 U DE 1863679U DE B49519 U DEB49519 U DE B49519U DE B0049519 U DEB0049519 U DE B0049519U DE 1863679 U DE1863679 U DE 1863679U
Authority
DE
Germany
Prior art keywords
recipients
heating device
electric heating
recipient
insulation
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
DEB49519U
Other languages
German (de)
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.)
BBC Brown Boveri AG Germany
Original Assignee
BBC Brown Boveri AG Germany
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 BBC Brown Boveri AG Germany filed Critical BBC Brown Boveri AG Germany
Priority to DEB49519U priority Critical patent/DE1863679U/en
Publication of DE1863679U publication Critical patent/DE1863679U/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/78Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83Heating or cooling the cylinders
    • B29C48/832Heating

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Details (AREA)
  • Resistance Heating (AREA)

Description

BB CBB C

BROW5BOVEEi & ΟΙΕ
Aktiengesellschaft
BROW 5 BOVEEi & ΟΙΕ
Corporation

MannheimMannheim

Mp, St. 65o/62Mp, St. 65o / 62

Mannheimj den 5o6„62 Pat.R/MiMannheimj the 5o6 "62 Pat.R / Mi

Elektrische Heizvorrichtung für RezipientenElectric heating device for recipients

Bei Strang-und Kabelmantelpressen werden die zu verpressenden Bolzen während des Preßvorganges in sogenannten Rezipienten eingesetzts deren Bohrung einseitig durch die Matrize, auf der anderen Seite durch Preßscheibe und Preßstempel abgeschlossen ist ο Mit dem Preßstempel wird beim Yorwärtsbewegen auf den Bolzen ein derartiger Druck ausgeübt, daß das Material durch die Öffnung in der Matrize austritt, wobei der entstehende Strang entsprechend den Umrissen der Matrizenöffnung geformt wird ο 'In the case of strand and cable jacket presses, the bolts to be pressed are placed in so-called recipients during the pressing process used their hole on one side through the die on which the other side is closed by the press disk and press ram ο The press ram is used when moving forward on the Bolt exerted such a pressure that the material through the opening in the die emerges, the resulting strand being shaped according to the contours of the die opening will ο '

Der Preßvorgang erfordert $e nach Material und !legierung eine bestimmte Temperatur, auf die die Preßbolzen in bekannter Weise in Öfen aufgeheizt werden« Auch die Rezipienten müssen auf diese Temperatur erwärmt und auf ihr gehalten werden»■ Die Wärmeerzeugung durch die meist elektrische Heizung erfolgt induktiv und konvektiVo Da die in der Wicklung entstehende Joule'.'sehe Wärme nur konvektiv über die\ Isolation der Leiter an die Bohrungswandung abgegeben werden kann, werden die Heizstäbe wesentlich wärmer als der Reζipient. Die zulässige Stabtemperatur bestimmt deshalb in vielen Fällen die maximale Arbeitstemperatur des Rezipienten*The pressing operation requires $ e on the material and! Alloy a certain temperature to which the slugs are heated in a known manner in ovens "The recipients have to be heated to this temperature and kept up their" ■ The heat generation by the mostly electric heating is inductive can be and konvektiVo Since the resulting in the winding Joule '.' see only heat convection via the \ insulation of the wire to the bore delivered, the heating elements are significantly warmer than the Reζipient. The permissible rod temperature therefore determines the maximum working temperature of the recipient in many cases *

Ein Ausführungsbeispiel einer an sich bekannten induktiven Beheizung ist in Fig„ 1 und 2 dargestellte Figo 1 zeigt einen Rezipienten 1 in Draufsicht mit der zentralen Bohrung 2, die zur Aufnahme der Preßbolzen dient» Fig, 2 stellt den Rezipienten im Schnitt parallel zur Achse dar»An embodiment of an inductive heating known per se is shown in Fig. 1 and 2 Figo 1 shows a recipient 1 in plan view with the central bore 2, which is used to receive the press bolts »Fig, 2 shows the recipient in section parallel to the axis»

- 2 -- 65ο/62- 2 - 65ο / 62

Auf den Teilkreis 3 sind um die Mittelbohrung 2 zwölf Bohrungen 4 angeordnet. In diese Bohrungen sind Kupferstäbe 59 die -von einer elektrischen isolierenden Schicht 6 umgeben sind, eingepaßte Die Kupferstäbe 5 sind abwechselnd an den Stirnseiten durch laschen 7 in Serie geschaltet und über Anechlußfahnen 8 an das Wechselstromnetz, z.B. über einen- nicht dargestellten Reguliertransformator, angeschlossen.Twelve holes 4 are arranged around the central hole 2 on the pitch circle 3. In these bores, copper rods 5 9 which are surrounded by an electrically insulating layer 6 are fitted.The copper rods 5 are alternately connected in series at the end faces through tabs 7 and connected via connection lugs 8 to the alternating current network, e.g. via a regulating transformer (not shown) .

Bisher wurden die Stäbe allgemein mit Asbest isoliert, Asbest hat nur eine geringe spezifische Wärmeleitfähigkeit, außerdem ist es sehr schwierig, bei einer Asbestisolation Lufteinschlüsse zu vermeiden. Der dadurch bedingte hohe Wärmewiderstand der Isolation verursacht ein entsprechend hohes Temperaturgefälle zwischen Leiter und Rezipient.So far, the rods were generally insulated with asbestos, asbestos has only a low specific thermal conductivity, moreover it is very difficult to get air pockets with asbestos insulation to avoid. The resulting high thermal resistance of the insulation causes a correspondingly high temperature gradient between leader and recipient.

Bei einer elektrischen Heizvorrichtung für Rezipienten von Str-ang-und Kabelmantelpressen, bestehend aus einer, in Bohrungen bezWo Ausnehmungen des Rezipientenkörpers angeordneten Heizwicklung, werden gemäß der Neuerung diese Nachteile dadurch vermieden, daß die Isolation 6 der Heizleiter aus einer bei niedrigen Temperaturen sinternden Keramik besteht» Diese Keramik kann Z0B0 in der.Weise hergestellt sein, daß die Ausgangsstoffe derselben trocken oder aufgeschwemmt in den durch entsprechende Maßnahmen distanzierten Zwischenraum zwischen Stab und Wand der Bohrung eingebracht und anschließend gesintert sind. Dadurch werden bei nur geringem Arbeitsaufwand Lufteinschlüsse zwischen Stab, Isolation und Wandung der Bohrung vermiedene Als besonders geeignet hat sich Magnesiumoxyd als Ausgangsstoff der Keramik erwiesen.In an electrical heating device for recipients of string and cable jacket presses, consisting of a heating winding arranged in bores or recesses in the recipient body, these disadvantages are avoided according to the innovation in that the insulation 6 of the heating conductors consists of a ceramic sintering at low temperatures »This ceramic can Z 0 B 0 be manufactured in such a way that the starting materials of the same are introduced, dry or floating, into the space between the rod and the wall of the bore, which has been distanced by appropriate measures, and then sintered. As a result, air inclusions between the rod, insulation and wall of the bore are avoided with little effort. Magnesium oxide has proven to be particularly suitable as the starting material for ceramics.

Durch die gute Wärmeleitfähigkeit des Magnesiumoxyds, die etwa zehnmal so groß als die des Asbestes ist, wird der Wärmewiderstand der Isolation erheblich vermindert und der Temperatursprung zwischen Leiter und Rezipient wesentlich verkleinert.Due to the good thermal conductivity of magnesium oxide, which is about The thermal resistance becomes ten times that of asbestos the insulation is significantly reduced and the temperature jump between the conductor and the recipient is significantly reduced.

~ 3 ~ 65o/62 ~ 3 ~ 65o / 62

Eine bestimmte Temperatur des Rezipienten kann daher bei einer 'niedrigeren Temperatur der Heizleiter erreicht werden, was verschiedene Vorteile, z„B, hinsichtlich der Berücksichtigung von Wärmeausdehnungeη der Heizleiter und hinsichtlich der Vermeidung von Verzunderungen der Heizleiter, bedeutet«A certain temperature of the recipient can therefore with a 'lower temperature of the heating conductors can be achieved, which has various advantages, for example, with regard to the consideration of Wärmeausdehnungeη the heating conductor and with regard to the avoidance of scaling of the heating conductors, means «

— 4 —- 4 -

Claims (1)

P.A. 374979*-! 6.62P.A. 374979 * -! 6.62 - 4 -- 65o/62- 4 - 65o / 62 SchutzansprucJae sProtection claims s Elektrische Heizvorrichtung für Rezipienten von Strangoder Kabelmantelpressen, bestehend aus einer in Bohrungen bezWo Ausnehmungen des Bezipientenkörpers angeordneten Heizwicklung, dadurch gekennzeichnet, daß die Isolation der Heizleiter aus einer bei niedrigen Temperaturen sinternden Keramik besteht=Electric heating device for recipients from Strangoder Cable jacket presses, consisting of one in bores bezWo recesses arranged in the body of the recipient Heating coil, characterized in that the insulation of the heating conductor consists of a sintering at low temperatures Ceramic consists = Elektrische Heizvorrichtung nach Anspruch I9 dadurch gekennzeichnet, daß die. Keramik aus gesintertem Magnesiumoxyd besteh toElectrical heating device according to Claim I 9, characterized in that the. Ceramic made from sintered magnesium oxide
DEB49519U 1962-06-08 1962-06-08 ELECTRIC HEATING DEVICE FOR RECIPIENTS. Expired DE1863679U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB49519U DE1863679U (en) 1962-06-08 1962-06-08 ELECTRIC HEATING DEVICE FOR RECIPIENTS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB49519U DE1863679U (en) 1962-06-08 1962-06-08 ELECTRIC HEATING DEVICE FOR RECIPIENTS.

Publications (1)

Publication Number Publication Date
DE1863679U true DE1863679U (en) 1962-12-13

Family

ID=33137939

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB49519U Expired DE1863679U (en) 1962-06-08 1962-06-08 ELECTRIC HEATING DEVICE FOR RECIPIENTS.

Country Status (1)

Country Link
DE (1) DE1863679U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1286413B (en) * 1963-10-12 1969-01-02 Daimler Benz Ag Wheel suspension for the steerable front wheels of motor vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1286413B (en) * 1963-10-12 1969-01-02 Daimler Benz Ag Wheel suspension for the steerable front wheels of motor vehicles

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