DE896247C - Arrangement for heating insulating bodies in an alternating electrical field, in particular for vulcanizing rubber - Google Patents
Arrangement for heating insulating bodies in an alternating electrical field, in particular for vulcanizing rubberInfo
- Publication number
- DE896247C DE896247C DES6541D DES0006541D DE896247C DE 896247 C DE896247 C DE 896247C DE S6541 D DES6541 D DE S6541D DE S0006541 D DES0006541 D DE S0006541D DE 896247 C DE896247 C DE 896247C
- Authority
- DE
- Germany
- Prior art keywords
- arrangement
- alternating electrical
- insulating bodies
- vulcanizing rubber
- electrical field
- 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
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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/12—Dielectric heating
-
- 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
- B29K2021/00—Use of unspecified rubbers as moulding material
-
- 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
- B29K2909/00—Use of inorganic materials not provided for in groups B29K2803/00 - B29K2807/00, as mould material
- B29K2909/02—Ceramics
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Es ist bekannt, Isolierkörper im elektrischen Hochfrequenzfelde zu erhitzen. Wenn es sich dabei um plastische Körper handelt oder um solche, die bei der Erhitzung erweichen, ist es erforderlich, die Behandlung in einer geeigneten Form durchzufüirenX Man verwendet zu diesem Zweck Formen aus Isoliermaterialien, welche geringe dielektrische Verluste aufweisen. So kommen beispielsweise Hartporzellan oder andere keramische Werkstoffe geringer Verluste in Betracht. Die Form kann gleichzeitig dazu dienen, einen Druck auf das zu behandelnde Gut, beispielsweise zu vulkanisierenden Gummi, auszuüben, sei es, um diesem Gut eine gewünschte Form zu erteilen, sei es, um seine Dichte zu erhöhen. Wenn man, wie es bekannt ist, die zur Erzeugung des elektrischen Feldes dienenden Elektroden auf die Form auflegt, dann entstehen bei der Anwendung hoher Feldstärken durch Sprüherscheinungen Verluste; auch kommen leicht Überschläge zustande. Um diese Mängel zu vermeiden, wird gemäß der Erfindung die Elektrode unmittelbar auf die Preßform aufgetragen, und zwar in der Weise, daß ein leitender Körper, beispielsweise ein Metall, in feinverteilter Form auf die mit der Elektrode zu bedeckenden Stellen der Form niedergeschlagen wird. Das Elektrodenmaterial kann beispielsweise durch Aufspritzen, Aufdampfen oder auf chemischem Wege niedergeschlagen werden. Gegebenenfalls kann man auch elektrolytisch erzeugte Niederschläge anwenden oder chemisch erzeugte Niederschläge elektrolytisch verstärken. Es empfiehlt sich, in an sich bekannter Weise dafür zu sorgen, daß an den Rändern des Elektrodenbelages keine hohen FeLdstärken auftreten. Um das zu vermeiden, kann man die Ränder mit verhältnismäßig großen Krümmungsradien versehen. In besonders einfacher Weise erhält man derartige als Elektroden brauchbare Niederschläge, wenn man die Form, beispielsweise eine Hartporzellanform, mit nutenartigen Vertiefungen versieht, deren Ränder nicht zu kleine Krümmungsradien besitzen. Durch überziehen der Innenseite dieser Nut mit Metall kann man dann eine Elektrode erhalten, welche keinen Anlaß zu nennenswerten Verlusten gibt. It is known to use insulating bodies in high-frequency electrical fields heat. If these are plastic bodies or those with To soften the heating, it is necessary to treat in a suitable X Molds made of insulating materials are used for this purpose, which have low dielectric losses. This is how hard-paste porcelain comes, for example or other ceramic materials with low losses. The shape can be simultaneous serve to put a pressure on the item to be treated, for example to be vulcanized Rubber, to exercise, be it to give this good a desired shape, be it to to increase its density. If, as is well known, one is involved in generating the Electric field serving electrodes is placed on the mold, then arise at the use of high field strengths due to spray phenomena losses; also come easily Rollover occurs. In order to avoid these shortcomings, according to the invention Electrode applied directly to the mold, in such a way that a conductive body, for example a metal, in finely divided form on the with the electrode to be covered areas of the mold is deposited. The electrode material can be deposited, for example, by spraying, vapor deposition or chemical means will. If necessary, it is also possible to use electrolytically generated precipitates or electrolytically reinforce chemically generated precipitates. It is advisable, to ensure in a known manner that at the edges of the electrode coating no high field strengths occur. To avoid this, you can use the edges provided relatively large radii of curvature. Receives in a particularly simple way one such usable as electrodes deposits, if one has the shape, for example a hard-paste porcelain mold, provided with groove-like depressions, the edges of which are not have too small radii of curvature. By covering the inside of this groove with Metal one can then obtain an electrode which has no cause to mention Losses there.
Ein Ausführungsbeispiel der Erfindung ist in der Figur dargestellt. Mit I und 2 sind die beiden Teile einer Preßform bezeichnet, die einen Hohlraum 3 einschließen, der mit dem zu erhitzenden Material. beispielsweise zu vulkanisierenden Gummi, gefüllt ist. Zur Aufnahme der Elektroden ist die obere Fläche des Teiles I und die untere Fläche des Teiles 2 mit nutenartigen Vertiefungen 4 und 5 versehen, deren Innenseite beispielsweise durch Spritzen mit Metallbelägen 6 und 7 versehen ist. An embodiment of the invention is shown in the figure. With I and 2, the two parts of a mold are referred to, which has a cavity 3 Include the one with the material to be heated. for example to be vulcanized Rubber that is filled. The upper surface of the part is used to hold the electrodes I and the lower surface of part 2 are provided with groove-like depressions 4 and 5, the inside of which is provided with metal coatings 6 and 7, for example by spraying is.
Zwischen diese Metallbeläge wird die zur Erzeugung des elektrischen Feldes nötige Hochfrequenzspannung angelegt. Bei der Verwendung keramischer Isoliermaterialien kann man den leitenden Belag einbrennen, wie dies bei der Herstellung von Kondensatoren mit keramischem Dielektrikum bekannt ist. Der Belag kann gegebenenfalls auf elektrolytischem Wege verstärkt werden.Between these metal coverings is used to generate the electrical The required high-frequency voltage is applied to the field. When using ceramic insulating materials the conductive coating can be burned in, as is the case with the manufacture of capacitors with ceramic dielectric is known. The coating can optionally be electrolytic Ways are reinforced.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES6541D DE896247C (en) | 1945-03-30 | 1945-03-30 | Arrangement for heating insulating bodies in an alternating electrical field, in particular for vulcanizing rubber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES6541D DE896247C (en) | 1945-03-30 | 1945-03-30 | Arrangement for heating insulating bodies in an alternating electrical field, in particular for vulcanizing rubber |
Publications (1)
Publication Number | Publication Date |
---|---|
DE896247C true DE896247C (en) | 1953-11-09 |
Family
ID=7472063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES6541D Expired DE896247C (en) | 1945-03-30 | 1945-03-30 | Arrangement for heating insulating bodies in an alternating electrical field, in particular for vulcanizing rubber |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE896247C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1295113B (en) * | 1956-10-04 | 1969-05-14 | Gen Motors Corp | Apparatus for embossing a pattern on a dielectric sheet material |
EP0404380A1 (en) * | 1989-06-05 | 1990-12-27 | Kinugawa Rubber Industrial Co., Ltd. | Method for molding and vulcanizing of rubber |
-
1945
- 1945-03-30 DE DES6541D patent/DE896247C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1295113B (en) * | 1956-10-04 | 1969-05-14 | Gen Motors Corp | Apparatus for embossing a pattern on a dielectric sheet material |
EP0404380A1 (en) * | 1989-06-05 | 1990-12-27 | Kinugawa Rubber Industrial Co., Ltd. | Method for molding and vulcanizing of rubber |
US6083444A (en) * | 1989-06-05 | 2000-07-04 | Kinugawa Rubber Industrial Co., Ltd. | Method for molding and vulcanizing of rubber |
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