DE628149C - Process for the manufacture of electrical heating elements - Google Patents
Process for the manufacture of electrical heating elementsInfo
- Publication number
- DE628149C DE628149C DES109990D DES0109990D DE628149C DE 628149 C DE628149 C DE 628149C DE S109990 D DES109990 D DE S109990D DE S0109990 D DES0109990 D DE S0109990D DE 628149 C DE628149 C DE 628149C
- Authority
- DE
- Germany
- Prior art keywords
- manufacture
- electrical heating
- heating elements
- heating resistor
- heating
- 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
- 238000010438 heat treatment Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000005245 sintering Methods 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/18—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being embedded in an insulating material
Landscapes
- Surface Heating Bodies (AREA)
Description
Das Hauptpatent betrifft ein Verfahren zum Herstellen elektrischer Heizkörper, bei dem die Heizwiderstände in eine feuerfeste Schutzhülle eingebettet sind. Die Herstellung der elektrischen Heizkörper erfolgt nachdem Hauptpatent in der Weise, daß der Heizwiderstand nach keramischen Methoden mit der Schutzhülle, die mit dem Heizwiderstand keine Reaktionen eingeht, insbesondere durch Umgießen mit einem mit verdünnter Säure aktivierten Schlicker in saugfähigen Formen umgeben wird. Dabei wird zwischen Heizwiderstand und Schutzhülle eine nicht bleibende Schicht gebracht, deren Stärke der Schwindung der Schutzhülle beim Sintern entsprichjt. Durch Behandeln der Gesamtanordnung bei Temperaturen über 16000 wird dann die Schutzhülle nach Verdampfen der nicht bleibenden Schicht so weit gesintert, daß sie in sich vollkommen dicht wird und den Heizdraht gasdicht 'einschließt.The main patent relates to a method for producing electrical heating elements in which the heating resistors are embedded in a fire-proof protective cover. According to the main patent, the electrical heating element is manufactured in such a way that the heating resistor is surrounded by ceramic methods with the protective cover that does not react with the heating resistor, in particular by pouring a dilute acid-activated slip in absorbent molds. A non-permanent layer is placed between the heating resistor and the protective cover, the thickness of which corresponds to the shrinkage of the protective cover during sintering. By treating the entire arrangement at temperatures above 1600 0 , the protective sheath is sintered to such an extent after the evaporation of the non-permanent layer that it becomes completely tight and encloses the heating wire in a gas-tight manner.
Es hat sich1 nun gezeigt, daß bei diesem Verfahren bei dünnen Beizwidersitäniden,, deren Stärke unter 2 mm liegt, die nicht bleibende Schicht fortgelassen werden kann. Die Heizwiderstände können als. glatte oder gewickelte Drähte, Bänder o. dgl. verwendet werden. Man kann sie auch in die Wand eines Tiegels, einer Muffel oder eines anderen elektrisch zu beheizenden Gerätes einbetten und braucht dabei ebenfalls keine Zwischenschicht zwischen Heizwiderstand und Umhüllung anzuordnen.It has now been shown 1 in that in this process in thin Beizwidersitäniden ,, whose thickness is less than 2 mm, the fugitive layer can be omitted. The heating resistors can be used as. Smooth or coiled wires, tapes or the like can be used. They can also be embedded in the wall of a crucible, a muffle or another device that is to be electrically heated and there is also no need to arrange an intermediate layer between the heating resistor and the casing.
Auf der Zeichnung ist beispielsweise eine Muffel dargestellt. Der Heizwiderstand 1 ist in Schraubenform gewickelt und zickzackförmig in die Wand 2 der Muffel vollständig gasdicht eingebettet. Das Material der Muffel berührt den Heizwiderstand unmittelbar; die Stromzüführungen 3 sind an der Rückseite angebracht. Die Muffel wird in der üblichen Weise mit einer Wärmeisolierung· umgeben, und vorn durch eine Tür abgeschlossen. Die gasdicht eingebetteten Heizwiderstände sind gegen Beschädigungen und Angriffe von Heizgasen vollkommen geschützt. Man erhält nach dem Sintern einwandfreie Muffeln, die sich auch im Betrieb günstig verhalten, ohne daß infolge ungleichmäßiger Ausdehnung von Heizwiderstand und Schutz- 5" hülle Risse entstehen. Besonders vorteilhafte Ergebnisse erzielt man, wenn man ebenso, wie nach dem Verfahren des Hauptpatents, für den Heizwiderstand Wolfram oder Molybdän oder eine Wolfram-Molybdän-Legierung verwendet.For example, a muffle is shown in the drawing. The heating resistor is 1 wound in a helical shape and zigzag completely into the wall 2 of the muffle embedded gas-tight. The material of the muffle touches the heating resistor directly; the current leads 3 are attached to the rear. The muffle is in the usual Surrounded by thermal insulation and closed at the front by a door. The gas-tight embedded heating resistors are against damage and attacks completely protected from hot gases. Flawless ones are obtained after sintering Muffles that also behave favorably during operation without being uneven as a result Expansion of the heating resistor and protective 5 "shell cracks occur. Particularly advantageous Results are achieved if, as in the case of the main patent, for the heating resistor tungsten or molybdenum or a tungsten-molybdenum alloy used.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES109990D DE628149C (en) | Process for the manufacture of electrical heating elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES109990D DE628149C (en) | Process for the manufacture of electrical heating elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE628149C true DE628149C (en) | 1936-03-30 |
Family
ID=7529907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES109990D Expired DE628149C (en) | Process for the manufacture of electrical heating elements |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE628149C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1239415B (en) * | 1961-09-23 | 1967-04-27 | Georg Horstmann | Electric heating plate |
-
0
- DE DES109990D patent/DE628149C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1239415B (en) * | 1961-09-23 | 1967-04-27 | Georg Horstmann | Electric heating plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1465028B1 (en) | Electric resistance heating element | |
| DE628149C (en) | Process for the manufacture of electrical heating elements | |
| US1157916A (en) | Insulated wire and terminal therefor. | |
| DE627342C (en) | Process for the manufacture of electrical heating elements | |
| US2406966A (en) | Spark plug electrode | |
| US2091107A (en) | Electric heating element and method of making the same | |
| DE684656C (en) | Electric heater for high temperatures with a metallic heating conductor and a ceramic protective cover surrounding it | |
| DE748808C (en) | Process for the production of electrical heating conductor cables | |
| AT141158B (en) | Method of manufacturing electrical radiators with heating resistors. | |
| DE591426C (en) | Process for the insulation of electrical windings by filling the spaces with an inert inorganic filler and a silica-containing impregnation compound | |
| DE715926C (en) | Process for the production of electrically insulating and gas-tight bodies from aluminum oxide | |
| CH170221A (en) | Method of making electric radiators. | |
| DE570033C (en) | Electrical resistance | |
| DE758092C (en) | Rod-shaped electric heater for high temperatures above about 1300 ° C | |
| DE464830C (en) | Process for the operation of electric bright glow furnaces with uninterrupted operation in which the glow material and heating coil are surrounded by a protective gas | |
| DE634544C (en) | Process for the production of an insulating compound for the cladding of the embedded heating conductors of electrical heating devices | |
| DE704913C (en) | Process for degassing a rod-shaped resistance electrical conductor made of carbon, graphite or silicon carbide | |
| DE840422C (en) | Electrically heated devices | |
| DE969943C (en) | Process for increasing the service life of electrical resistance heating chambers, especially resistance ovens | |
| DE670183C (en) | Process for the production of electrical resistors with a conductor embedded in a ceramic material | |
| DE606308C (en) | Electric heating element, in particular hotplate | |
| DE693936C (en) | Electrical conduction material | |
| DE434303C (en) | Head with steadily distributed, increased inductance and process for its manufacture | |
| DE763511C (en) | Process for the vacuum-tight connection of metal caps with the ends of ceramic protective tubes for electrical high-temperature heating conductors by soldering | |
| SU368652A1 (en) | METHOD OF OBTAINING OXIDE COATING OF NICHROMOVA WIRE |