DE653431C - Process for the production of heat-resistant carriers from asbestos sheets for electrical heating resistors - Google Patents
Process for the production of heat-resistant carriers from asbestos sheets for electrical heating resistorsInfo
- Publication number
- DE653431C DE653431C DESCH107082D DESC107082D DE653431C DE 653431 C DE653431 C DE 653431C DE SCH107082 D DESCH107082 D DE SCH107082D DE SC107082 D DESC107082 D DE SC107082D DE 653431 C DE653431 C DE 653431C
- Authority
- DE
- Germany
- Prior art keywords
- heat
- heating resistors
- electrical heating
- asbestos sheets
- resistant
- 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 16
- 239000010425 asbestos Substances 0.000 title claims description 8
- 229910052895 riebeckite Inorganic materials 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 6
- 239000000969 carrier Substances 0.000 title claims 2
- 238000004519 manufacturing process Methods 0.000 title description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 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
- Resistance Heating (AREA)
Description
Verfahren zum Herstellen von hitzebeständigen Trägern aus Asbestplatten für elektrische Heizwiderstände Die Erfindung bezieht sich auf ein Verfahren zum Herstellen von hitzebeständigen Trägern aus Asbestplatten für elektrische Heizwiderstände.Process for the production of heat-resistant supports from asbestos panels for electrical heating resistors The invention relates to a method for Manufacture of heat-resistant supports from asbestos sheets for electrical heating resistors.
Elektrische Heizkörper, wie sie sowohl für kleine als auch für größere elektrisch beheizte Geräte, öfen u. dgl. in vielfacher Form verwendet werden, bestehen in der Regel aus einem Tragkörper, an dem die elektrischen Heizdrähte meistens in Form einer Schraubenlinie angeordnet sind. Es fehlt bisher an einem wirtschaftlich herstellbaren Träger, der auch den größten in der Praxis auftretenden Beanspruchungen genügt und z. B. für elektrische Glüh- und Schmelzöfen, in denen sehr hohe Temperaturen herrschen, verwendbar ist. Bisher für diesen Zweck verwendete Träger verformen sich oder brechen unter der Einwirkung der Hitze.Electric radiators, as they are for both small and large ones Electrically heated devices, ovens and the like are used in many ways usually from a support body on which the electrical heating wires are usually in Are arranged in the form of a helix. So far there is no one economically manufacturable carrier, which also the greatest stresses occurring in practice is enough and z. B. for electric annealing and melting furnaces in which very high temperatures prevail, is usable. Supports previously used for this purpose deform or break under the action of heat.
Ein allen Beanspruchungen hinsichtlich der Isolation, der Form- und der Hitzebeständigkeit genügender Heizdrahtträger wird .erfindungsgemäß erhalten, wenn man ein Gemisch von fein gemahlenem, hitzebeständigem, insbesondere aus Kieselsäure und Tonerde bestehendem keramischem Werkstoff, von ungebrannter Magnesia und von Borsäure mit Wasser zu einem Brei anrührt, der bis zurr Eintritt der Reaktion stehenbleibt und in den dann Asbestplatten so lange eingetaucht werden, bis die Platten mit einer Schicht umgeben sind, worauf die Platten gebrannt werden. Die Zeit, in welcher sich der Brei selbst überlassen bleibt, beträgt beispielsweise aoo Stunden. Die dann eintretende Reaktion erscheint äußerlich betrachtet wie eine Gärung; aus dem Brei steigen Luft- oder Gasblasen auf. Ist dieser Zustand erreicht, dann sind die einzelnen Bestandteile eine innige Verbindung miteinander eingegangen, auch hat dann die Masse eine erhebliche Dichtigkeit bekommen.All demands in terms of insulation, shape and the heat resistance sufficient heating wire carrier is obtained according to the invention, if you have a mixture of finely ground, heat-resistant, especially silica and alumina consisting of ceramic material, unfired magnesia and Mix boric acid with water to a paste which remains until the reaction occurs and then immersed in the asbestos panels until the panels with a Layer are surrounded, whereupon the plates are burned. The time in which the pulp is left to itself is, for example, aoo hours. Which then the reaction that occurs appears externally like fermentation; out of the pulp air or gas bubbles rise. If this state is reached, then the individual are Components have entered into an intimate connection with each other, also then has the mass get a considerable tightness.
In diesen mit Wasser verdünnten Brei werden alsdann die Platten aus Asbest eingetaucht. Soll der spätere Heizdrahtträger eine von der Platte abweichende Form aufweisen, dann werden aus den Asbestplatten vorher durch Schneiden und zusätzliche Formung die jeweils gewünschten Heizdrahtträger hergestellt, beispielsweise in Röhrenform.The plates are then made out of this paste diluted with water Asbestos immersed. Should the later heating wire support be different from the plate Shape then are made from the asbestos sheets beforehand by cutting and additional Forming the respective desired heating wire carrier produced, for example in tubular form.
Werden hinsichtlich der Isolation, der Form- und der Hitzebeständigkeit größere Anforderungen an den Heizdrahtträger gestellt, so wird gemäß der weiteren Erfindung der getrocknete Heizdrahtträger in einem auf etwa goo° C erhitzten Glühofen gebrannt. An Stelle der Behandlung in einem Glühofen können die getrockneten Heizdrahtträgerauch mittels einer offenen Flamme auf mindestens 6oo bis 700°C erhitzt werden. Man bedient sich hierzu zweckmäßig eines Stichflammenb renners, dem Gas und Sauerstoff zugeführt werden. Mit der Stichflamme werden die Heizdrahtträger überstrichen. Unter Einwirkung der Hitze tritt gewissermaßen ein Schmelzen oder Sintern der Masse ein. Die so behandelten H.eizdrahtträger entsprechen den größten in der Praxis auftretenden Anforderungen, auch sind sie vollständig gegen Aufnahme von Feuchtigkeit geschützt.Are in terms of insulation, dimensional stability and heat resistance greater demands are placed on the heating wire carrier, according to the further Invention of the dried heating wire carrier in an annealing furnace heated to around goo ° C burned. Instead of being treated in an annealing furnace, the dried heating wire supports can also be used be heated to at least 600 to 700 ° C using an open flame. One serves For this purpose, it is advisable to use a flame burner, which is supplied with gas and oxygen will. The heating wire supports are swept over with the jet flame. Under action The heat causes the mass to melt or sinter, so to speak. Those treated like that H. heating wire supports meet the greatest requirements that occur in practice, even they are completely protected against the absorption of moisture.
Wenn es sich darum handelt, die Heizdrähte selbst mit einer isolierenden
Schicht
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DESCH107082D DE653431C (en) | 1935-05-14 | 1935-05-14 | Process for the production of heat-resistant carriers from asbestos sheets for electrical heating resistors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DESCH107082D DE653431C (en) | 1935-05-14 | 1935-05-14 | Process for the production of heat-resistant carriers from asbestos sheets for electrical heating resistors |
Publications (1)
Publication Number | Publication Date |
---|---|
DE653431C true DE653431C (en) | 1937-11-24 |
Family
ID=7448315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DESCH107082D Expired DE653431C (en) | 1935-05-14 | 1935-05-14 | Process for the production of heat-resistant carriers from asbestos sheets for electrical heating resistors |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE653431C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1129245B (en) * | 1959-09-04 | 1962-05-10 | Wilhelm Uhlig | Process for the production of flat heating elements made of mica paper as a carrier for the heating coil for iron u. like |
-
1935
- 1935-05-14 DE DESCH107082D patent/DE653431C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1129245B (en) * | 1959-09-04 | 1962-05-10 | Wilhelm Uhlig | Process for the production of flat heating elements made of mica paper as a carrier for the heating coil for iron u. like |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3041327A1 (en) | AT LEAST PARTIAL VEGETABLE GLASS FRIT AND PORCELAIN MIXTURE MADE THEREOF, AND METHOD FOR PRODUCING IT | |
DE904036C (en) | Dielectric ceramic composition and process for their manufacture | |
DE653431C (en) | Process for the production of heat-resistant carriers from asbestos sheets for electrical heating resistors | |
DE1243078B (en) | Sintered bodies, preferably for use as a heating element | |
DE2941709A1 (en) | METHOD FOR THE CONTINUOUS PRODUCTION OF COAL ELECTRODES FOR ELECTRIC OVENS DURING OPERATION | |
DE1596949B2 (en) | FAST AND AT RELATIVELY LOW TEMPERATURE DE-GLASS COMPOSITIONS | |
DE1806457C3 (en) | Electric plate heater | |
DE1180466B (en) | Electric contact | |
DE2756402C2 (en) | Heat treatment furnace | |
DE19541299C1 (en) | Method of dissolving set glass solder e.g. for recovery of component materials from fuel cells | |
DE2445140A1 (en) | DIELECTRIC LAYERS WITH LOW DIELECTRICITY CONSTANT IN MULTI-LAYER STRUCTURES | |
DE507880C (en) | Process for heating ceramic ovens by directly acting flue gases and by electric heating elements and tunnel ovens | |
DE2516514C3 (en) | Process for the production of silicon monocrystals doped by neutron activation | |
EP0045518B1 (en) | Dense silicon-nitride shaped body containing yttrium oxide, and process for its production | |
DE1646914C (en) | Process for the production of burnt and optionally graphitized carbon molded bodies | |
DE716472C (en) | Process for the production of mass cores from magnetizable powder | |
DE210326C (en) | ||
DE683156C (en) | Fireproof, electrically insulating cover for electrical conductors | |
DE2548622A1 (en) | Capacitor ceramic prodn. esp. thick film capacitors - using precalcined mixt. of dielectric ceramic and vitreous binder gives constant properties | |
DE672961C (en) | Process for the production of resistors with a negative temperature coefficient from sintered metal oxide | |
DE828126C (en) | Electrical, in particular flexible, flat heating elements and processes for their production | |
DE497351C (en) | Process for the production of a metal jacket for conducting electricity on unannealed carbon electrodes | |
AT121087B (en) | Heat retentive material for electrical resistance heating elements. | |
DE1696666C (en) | Process for the manufacture of refractory bodies | |
DE492336C (en) | Process for manufacturing cathodes for discharge tubes |