DE683069C - Process for the production of ceramic moldings - Google Patents
Process for the production of ceramic moldingsInfo
- Publication number
- DE683069C DE683069C DER97527D DER0097527D DE683069C DE 683069 C DE683069 C DE 683069C DE R97527 D DER97527 D DE R97527D DE R0097527 D DER0097527 D DE R0097527D DE 683069 C DE683069 C DE 683069C
- Authority
- DE
- Germany
- Prior art keywords
- slate
- asbestos
- production
- dry
- mica
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Description
Verfahren zur Herstellung von keramischen Formstücken Keramische Formstücke, z. B. Isolierteile für Niederspannung, werden sehr häufig nach dem Trockenpreßverfahren hergestellt. Für die Verarbeitung eignen sich bestimmte Specl*stein- oder Talksorten je nach ihrer Struktur mehr oder weniger. Wenn nun, z. B. Talkchloritschiefer, Tonschiefer oder Glimmerschiefer, als besonders billige Rohstoffe durch Trockenpressung geformt werden sollen, so zeigt sich, daß bei den hohen Drücken, wie sie die Trockenpressung erfordert, senkrecht zur Druckrichtung eine Rißbildung,sogenannteSchieferung auftritt. Diese Erscheinung wird nach der Erfindung vermieden, wenn der keramischen Trockenpreßmasse etwa r bis zo0% bestimmte Stoffe von faserigem Charakter zugemischt werden und das Gemisch anschließend gemahlen wird. Es ist bekannt, glimmerhaltige Massen mit Asbestmehl zu mischen und diese mit einem leichtschmelzenden Bindemittel unter Druck zusammenzupressen, wobei Glimmer und Asbest in ihrer mineralischen Eigenart erhalten bleiben. Sie treten untereinander sowie auch mit dem Schmelzmittel in keinerlei nennenswerte chemische Reaktion. Es ist auch bekannt, feuerfeste Gegenstände, wie z. B. Ofensteine, mit faserigen Naturstoffen, wie Asbest, zu verpressen. Gemäß der vorliegenden Erfindung soll aber das Aufspalten gepreßter Formstücke aus stark geschieferten Rohstoffen durch den Zusatz von Faserstoffen verhindert werden. Solche Fasern liegen regellos in der Masse verteilt und geben- einem Preßkörper eine genügende Trockenfestigkeit, der ohne diesen Zusatz durch die stark bevorzugte Parallelrichtung der einzelnen Blättchen aus Tonschiefer oder Glimmerschiefer aufspalten und auseinander fallen würde. Trockenpreßkörper, die sehr viel Glimmerschiefer enthalten, lassen sich ohne Zusatz von Asbest, Brucit oder organischen Faserstoffen, wie Zellstoff, gar nicht verarbeiten. Um unnötige Porenbildung durch Herausbrennen von Zellstoff zu vermeiden, sind aber anorganische Fasern vorzuziehen. Diese Stoffe sind der Grundmasse nicht wesensfremd und beteiligen sich an der Reaktion beim keramischen Brand des Scherbens.Process for the production of ceramic fittings Ceramic fittings, z. B. insulating parts for low voltage, are very often after the dry pressing process manufactured. Certain types of stone or talc are suitable for processing more or less depending on their structure. If now, e.g. B. talc chlorite slate, clay slate or mica slate, formed by dry pressing as particularly cheap raw materials are to be, it turns out that at the high pressures, such as the dry pressing requires cracking, so-called shearing, to occur perpendicular to the printing direction. This phenomenon is avoided according to the invention when the ceramic dry molding compound about r to zo0% certain substances of a fibrous character are added and that Mixture is then ground. It is known to use micaceous masses with asbestos flour to mix and to compress them with a low-melting binder under pressure, whereby mica and asbestos are retained in their mineral character. they kick with each other as well as with the flux in no noteworthy chemical Reaction. It is also known to use refractory articles, such as e.g. B. furnace stones, with to compress fibrous natural substances such as asbestos. According to the present invention but should be the splitting of pressed fittings made of heavily slagged raw materials can be prevented by the addition of fibers. Such fibers lie randomly distributed in the mass and give a pressed body a sufficient dry strength, the one without this addition by the strongly preferred parallel direction of the individual Split slate or mica slate leaves and fall apart would. Dry compacts that contain a lot of mica slate can be dispensed with No addition of asbestos, brucite or organic fibers such as cellulose at all to process. To avoid unnecessary pore formation due to pulp burning out, however, inorganic fibers are preferable. These substances are not the basic mass alien and participate in the reaction during the ceramic fire of the body.
Beispielsweise seien folgende Versätze angegeben: r. 6;5 °% Ton- oder Glimmerschiefer, 30% Talkchloritschiefer, 5 % Asbest oder Brucit. z. 75 % Tonschiefer, 2i % Talkchloritschiefer, 4 0/, Zellstoffaser.For example, the following offsets are given: r. 6; 5% clay or Mica slate, 30% talc chlorite slate, 5% asbestos or brucite. z. 75% slate, 2% talc chlorite slate, 40%, cellulose fiber.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER97527D DE683069C (en) | 1936-10-08 | 1936-10-08 | Process for the production of ceramic moldings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER97527D DE683069C (en) | 1936-10-08 | 1936-10-08 | Process for the production of ceramic moldings |
Publications (1)
Publication Number | Publication Date |
---|---|
DE683069C true DE683069C (en) | 1939-10-28 |
Family
ID=7419793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER97527D Expired DE683069C (en) | 1936-10-08 | 1936-10-08 | Process for the production of ceramic moldings |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE683069C (en) |
-
1936
- 1936-10-08 DE DER97527D patent/DE683069C/en not_active Expired
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