DE695707C - end with the help of high-frequency alternating fields - Google Patents

end with the help of high-frequency alternating fields

Info

Publication number
DE695707C
DE695707C DE1938S0130274 DES0130274D DE695707C DE 695707 C DE695707 C DE 695707C DE 1938S0130274 DE1938S0130274 DE 1938S0130274 DE S0130274 D DES0130274 D DE S0130274D DE 695707 C DE695707 C DE 695707C
Authority
DE
Germany
Prior art keywords
electrodes
alternating fields
frequency alternating
high frequency
help
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
DE1938S0130274
Other languages
German (de)
Inventor
Dr Phil Joachim Boehme
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
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 Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Priority to DE1938S0130274 priority Critical patent/DE695707C/en
Application granted granted Critical
Publication of DE695707C publication Critical patent/DE695707C/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
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/12Dielectric heating
    • 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
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/02Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B29C33/048Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam using steam
    • 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
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/049Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2021/00Use of unspecified rubbers as moulding material

Description

Vorrichtung zum Vulkanisieren von Kautschukgegenständen mit Hilfe hochfrequenter Wechselfelder Es ist vorgeschlagen worden, Kautschukgegenstände dadurch zu vulkanisieren,:daß sie der Einwirkung hochfrequenter Wechselfelder ausgesetzt werden. Diese Felder werden mit Wechselspannungen erregt, deren Frequenz größer ist als 3 X .i o6 Hertz entsprechend 'einer Wellenlänge von weniger als ioo rn. Besonders gute Ergebnisse werden mit Wellenlängen in der Größenordnung von io m erzielt. Der Vorteil dieses Vulkanisationsverfahrens liegt darin, daß in den Kautschukgegenständen kein Wärmegefälle auftritt. Das Verfahren eignet sich daher besonders für Stücke- 'großen Querschnitts.Device for vulcanizing rubber objects with the aid high frequency alternating fields It has been proposed to make rubber articles thereby to vulcanize: that they are exposed to the action of high-frequency alternating fields will. These fields are excited with alternating voltages, the frequency of which is greater is than 3 X .i o6 Hertz corresponding to a wavelength of less than 100 m. Particularly good results are obtained with wavelengths in the order of magnitude of 10 m achieved. The advantage of this vulcanization process is that in the rubber articles no heat gradient occurs. The method is therefore particularly suitable for pieces '' large cross-section.

Gemäß der Erfindung werden Vorrichtungen zum Vulkanisieren von Kautschukgegenständen dadurch vervollkommnet, daß die Elektroden, zwischen denen das Hochfr equenzfeld erzeugt wird, künstlich beheizbar sind. Vorteilhaft wird während oder anschließend an die Hochfrequenzeinwirkung ein Heizmittel, beispielsweise Wasserdampf, in die als Hohlkörper ausgebildeten Elektroden geleitet.According to the invention there are devices for vulcanizing rubber articles perfected by the fact that the electrodes, between which the high frequency field is generated, are artificially heated. It is advantageous during or afterwards to the high frequency effect a heating means, for example water vapor, in the conducted as a hollow body electrodes.

Der Erfindung liegt die Erkenntnis zugrunde, daß an der äußeren Oberfläche der durch Hochfrequenz beheizten Kautschukgegenstände Wärmeabstrahlungen # auftreten, die dazu führen,. daß die Temperatur der äußeren Querschnittsteile kleiner ist als im Innern. Der Erfolg der Vulkanisation kann dadurch beeinträchtigt werden, weil die äußeren Querschnittsteile anderen Temperaturen ausgesetzt sind als die Teile im Innern der Gegenstände. Dieser Nachteil wird durch die Beheizung der Elektroden beseitigt, zwischen denen das Hochfrequenzfeld erzeugt wird. Die Elektroden halten an der Außenfläche des zu vulkanisierenden Kautschukgegenstandes zwangläufig eine bestimmte Temperatur aufrecht-und vermeiden dadurch Abstrahlungen des erhitzten Kautschukkörpers. Die erfindungsgemäße Ausbildung der Elektroden als Hohlkörper ist besonders vorteilhaft, da die für die Ausbildung des Hochfrequenzfeldes notwendige Elektrodenanordnung durch die Zusatzheizung in keiner Weise ungünstig beeinflußt wird.The invention is based on the knowledge that on the outer surface heat radiation of the rubber objects heated by high frequency occurs, that lead to,. that the temperature of the outer cross-sectional parts is less than at the inside. The success of vulcanization can be affected because the outer cross-sectional parts are exposed to different temperatures than the parts inside the objects. This disadvantage is caused by the heating of the electrodes eliminated, between which the high frequency field is generated. the Electrodes stick to the outer surface of the rubber article to be vulcanized inevitably maintain a certain temperature and thereby avoid radiation of the heated rubber body. The inventive design of the electrodes as Hollow body is particularly advantageous because it is responsible for the formation of the high-frequency field necessary electrode arrangement by the additional heating in no way unfavorable being affected.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es ist angenommen, daß ein ringförmiger Kautschukkörper G durch ein Hochfrequenzfeld erhitzt werden soll. Zu beiden Seiten des Kautschukkörpers werden daher ringförmige Elektroden R1, R2 angeordnet, von denen der äußere Ring R2 als Hohlkörper ausgebildet ist. In diesen Hohlkörper wird ein an sich bekanntes beliebiges Heizmittel, beispielsweise Wasserdampf, geleitet, das dafür sorgt, daß aus dem erhitzten Kautschukkörper G nach außen keine Wärme abstrahlen kann. Die beiden Ringelektroden Ri, R2 werden an die beiden Pole eines Hochfrequenzgenerators angeschlossen, dessen Anordnung und Schaltung an sich beliebig sein kann. 'Mit Vorteil wird eine Generatorröhre mit metallischen Außenanoden verwendet. In der Zeichnung ist eine solche Generatorröhre als zylindrischer Körper H dargestellt, der an seinen beiden Enden metallene Belegungen Ml, M2 hat. Die obere Belegung Ml ist durch metallische Brücken .V mit dem infieren Elektrodenring R1 verbunden. Die untere Belegung M2 ist an Ringelektroden R3 angeschlossen, welche die äußeren, als HohlkörperausgebildetenRingelektroden R2 gleichmittig umgeben. Die Hochfrequenzströsn.e fließen von den Ringelektroden R3 durch den Luftzwischenraum zu den Hohlelektroden R2 und von diesen durch den Kautschukkörper 0 zu der inneren Ringelektrode R1.An exemplary embodiment of the invention is shown in the drawing. It is assumed that a ring-shaped rubber body G by a high frequency field should be heated. Both sides of the rubber body therefore become ring-shaped Arranged electrodes R1, R2, of which the outer ring R2 is designed as a hollow body is. Any desired heating means known per se, for example Steam, conducted, which ensures that from the heated rubber body G cannot radiate heat to the outside. The two ring electrodes Ri, R2 are connected to the two poles of a high frequency generator, its arrangement and circuit itself can be arbitrary. 'A generator tube is advantageous used with metallic outer anodes. Such a generator tube is shown in the drawing Shown as a cylindrical body H, the metal coverings at both ends Ml, M2 has. The upper occupancy Ml is through metallic bridges .V with the infect Electrode ring R1 connected. The lower assignment M2 is connected to ring electrodes R3, which surround the outer ring electrodes R2, which are designed as hollow bodies, in the same center. The high frequency currents flow from the ring electrodes R3 through the air gap to the hollow electrodes R2 and from these through the rubber body 0 to the inner one Ring electrode R1.

Es sei noch erwähnt, daß es unter Umständen vorteilhaft ist, zu beiden Seiten des er-.lU'tszten Kautschukkörpers Hohlelektroden an--,ibrdnen, die von einem besonderen Heizmittel durchflossen werden. Bei dem in der Zeichnung dargestellten Ausführungsbeispiel ist dies nicht nötig, weil die Belegungen 1Y11 der. Generatorröhre H selbst durch die von der Anode der Röhre ausgestrahlte Wärme erhitzt werden. Diese Hitze teilt sich den inneren Ringelektroden R1 mit und sorgt dafür, daß nach innen der Kautschukring G keine Wärme abstrahlen kann. Das in die Hohlelektroden eingebrachte Heizmittel kann gleichzeitig mit der Hochfrequenzheizung oder anschließend an dieselbe, z. B. nach Erreichung der für die Vulkanisierung erforderlichen Temperatur durch Hochfrequenzbeheizung, wirksam sein. In letzterem Falle, bei dem also nur das Aufheizen der zu vulkanisierenden Körper durch Hochfrequenzenergie erfolgt, wird der Vorteil erzielt, daß die an sich teure Hochfrequenzenergie nur für denjenigen Teil des Vulkanisierungsverfahrens verwendet wird, in welchem mit den bekannten Mitteln keine gleichmäßige Heizung des vulkanisierenden Körpers möglich ist.It should also be mentioned that it may be advantageous to use both Hollow electrodes on the sides of the rubber body special heating means are flowed through. With the one shown in the drawing Embodiment, this is not necessary because the assignments 1Y11 of the. Generator tube H itself be heated by the heat radiated from the anode of the tube. These Heat is shared with the inner ring electrodes R1 and ensures that inward the rubber ring G cannot radiate heat. The one introduced into the hollow electrodes Heating means can be used at the same time as the high-frequency heating or after the same, z. B. after reaching the temperature required for vulcanization High frequency heating, be effective. In the latter case, only heating up the body to be vulcanized is done by high frequency energy, the advantage will be achieved that the per se expensive high frequency energy only for that part of the vulcanization process is used, in which with the known means no uniform heating of the vulcanizing body is possible.

Claims (1)

PATENTANSPRÜCHE: i. Vorrichtung zum Vulkanisieren von Kautschukgegenständen mit Hilfe hochfrequenter Wechselfelder, dadurch gekennzeichnet, daß die Elektroden (R1, R2), zwischen welchen das Hochfrequenzfeld erzeugt wird, künstlich beheizbar sind. a. Vorrichtung nach Anspruch i, dadurch gekennzeichnet, daß die Elektroden als Hohlkörper ausgebildet sind, in die während oder anschließend an die Hochfrequenzbehandlung ein Heizmittel, beispielsweise Wasserdampf, eingeleitet wird.PATENT CLAIMS: i. Device for vulcanizing rubber articles with the aid of high-frequency alternating fields, characterized in that the electrodes (R1, R2), between which the high-frequency field is generated, artificially heatable are. a. Device according to claim i, characterized in that the electrodes are designed as hollow bodies, in the during or after the high-frequency treatment a heating medium, for example water vapor, is introduced.
DE1938S0130274 1938-01-05 1938-01-06 end with the help of high-frequency alternating fields Expired DE695707C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1938S0130274 DE695707C (en) 1938-01-05 1938-01-06 end with the help of high-frequency alternating fields

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE848468X 1938-01-05
DE1938S0130274 DE695707C (en) 1938-01-05 1938-01-06 end with the help of high-frequency alternating fields

Publications (1)

Publication Number Publication Date
DE695707C true DE695707C (en) 1940-08-31

Family

ID=25950184

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1938S0130274 Expired DE695707C (en) 1938-01-05 1938-01-06 end with the help of high-frequency alternating fields

Country Status (1)

Country Link
DE (1) DE695707C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE840743C (en) * 1948-10-02 1952-06-09 Telefunken Gmbh Electrode arrangement for high frequency treatment
DE912748C (en) * 1950-06-11 1954-06-03 Telefunken Gmbh Process for the production of elastic-porous objects made of rubber, plastic or the like.
DE1174971B (en) * 1954-04-12 1964-07-30 Continental Gummi Werke Ag Process for vulcanization or hardening of molded bodies made of rubber or similar materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE840743C (en) * 1948-10-02 1952-06-09 Telefunken Gmbh Electrode arrangement for high frequency treatment
DE912748C (en) * 1950-06-11 1954-06-03 Telefunken Gmbh Process for the production of elastic-porous objects made of rubber, plastic or the like.
DE1174971B (en) * 1954-04-12 1964-07-30 Continental Gummi Werke Ag Process for vulcanization or hardening of molded bodies made of rubber or similar materials

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