DE428770C - Ceramic melting and casting furnace for dental purposes - Google Patents

Ceramic melting and casting furnace for dental purposes

Info

Publication number
DE428770C
DE428770C DEE31942D DEE0031942D DE428770C DE 428770 C DE428770 C DE 428770C DE E31942 D DEE31942 D DE E31942D DE E0031942 D DEE0031942 D DE E0031942D DE 428770 C DE428770 C DE 428770C
Authority
DE
Germany
Prior art keywords
casting furnace
dental purposes
crucible
ceramic melting
ceramic
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
DEE31942D
Other languages
German (de)
Inventor
Karl Engelmann
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DEE27588D external-priority patent/DE394952C/en
Application filed by Individual filed Critical Individual
Priority to DEE31942D priority Critical patent/DE428770C/en
Application granted granted Critical
Publication of DE428770C publication Critical patent/DE428770C/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/20—Methods or devices for soldering, casting, moulding or melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/06—Air injection machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D45/00—Equipment for casting, not otherwise provided for
    • B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Description

Keramischer Schmelz- und Gießofen für zahntechnische Zwecke. Durch das Patent 394952 ist ein keramischer Schmelz- und Gießofen für zahntechnische Zwecke unter Schutz gestellt, der einen gasdichten Schmelztiegel oder eine gasdichte Muffel besitzt und bei dem Muffel und Tiegel gasdicht verbunden sind. Es hat sich herausgestellt, daß die Herstellung :eines völlig luftleeren Raumes beim Absaugen der .geschmolzenen keramischen Masse und die Bedienung des benutzten elektrischen Flammbogens erhebliche Schwierigkeiten bereitet. Diese werden durch die Verbesserung, welche den Gegenstand der Erfindung bildet, beseitigt.Ceramic melting and casting furnace for dental technology purposes. By Patent 394952 is a ceramic melting and casting furnace for dental technology purposes placed under protection of a gas-tight crucible or a gas-tight muffle and in which the muffle and crucible are connected in a gas-tight manner. It turned out that the production: a completely evacuated space when sucking off the .melted ceramic mass and the operation of the electric flame arc used Causes difficulties. These will be achieved by improving, Which forms the subject of the invention, eliminated.

Es findet auch hier ein gasdichter, z. B. aus Quarz hergestellter Tiegel Verwendung, der zur Aufnahme der Einbettungsmasse und des Gußmodells dient. Am Boden :des Quarztiegels ist ein Saugrohr aus gleichem Baustoff angeschmolzen. Die Beheizung erfolgt durch elektrische Widerstände, wie sie schon früher für keramische Öfen für zahnärztliche Zwecke vorgeschlagen worden sind. Beispielsweise werden Silitstäbe paarweise an den beiden Seiten des Tiegels parallel zueinander angeordnet.There is also a gas-tight, z. B. made of quartz Crucible use that is used to hold the investment material and the casting model. On the bottom: the quartz crucible has a suction tube made of the same building material melted on it. The heating is done by electrical resistors, as they were earlier for ceramic Ovens for dental purposes have been suggested. For example, silicon bars are used arranged in pairs on both sides of the crucible parallel to one another.

Die Anwendung eines gasdichten Tiegels ist sowohl hier, als auch bei dem Ofen des Hauptpatents aus dem Grunde von großer Bedeutung, weil das Gußstück beim Gießen an seinen Seiten gegen die Einwirkung von Luftströmen gesichert werden muß. Werden Luftströme beim Absaugen seitlich herangeführt, wie es bei einem nicht gasdichten Tiegel stets der .Fall ist, so leidet hierunter die Festigkeit des Gußstückes; außerdem wird es an seinen Umrissen unscharf.The use of a gas-tight crucible is here as well as at the furnace of the main patent for the reason of great importance because the casting be secured against the effects of air currents on its sides when pouring got to. Are air currents brought in from the side during suction, as it is not with one gas-tight crucible is always the case, the strength of the casting suffers as a result; in addition, its outlines become blurred.

Der Ofen ist in der Zeichnung im Aufriß beispielsweise dargestellt.For example, the furnace is shown in elevation in the drawing.

In dem, aus Schamotte bestehenden Körper i ist die zur Aufnahme :des aus Quarzglas bestehenden Schmelztiegels z bestimmte Aushöhlung 3 angebracht. An dem Boden des Schmelztiegels z ist das Rohr 4 aus Quarzglas angeschmolzen, das durch eine entsprechende Durchbohrung des Körpers i hindurchragt. In den Schamöttekörper i sind ferner die Schamotteröhren 5 eingelassen, welche zur Aufnahme der Silitwiderstandsstäbe 6 dienen. Die Aushöhlung 3 kann durch den Schamottedeckel 7 bedeckt werden, welche mit dem ebenfalls aus Schamotte bestehenden Verschlußstopfen 8 versehen ist.In the body i, which consists of chamotte, is the one for receiving: des Made of quartz glass crucible z specific cavity 3 attached. At the bottom of the crucible z is the tube 4 made of quartz glass melted through a corresponding through hole in the body i protrudes. In the pubic body i also let in the fireclay tubes 5, which are used to hold the silicon resistance rods 6 serve. The cavity 3 can be covered by the pubic lid 7, which is provided with the plug 8 also made of chamotte.

Beim Anheizen des Ofens und Ausglühen der Einbettungsmasse pind die sich entwickelnden Gase für die keramische Masse nicht schädlich, weil sie nach oben abziehen. Bei der Ausführung des Gusses, die durch Saugen durch das Saugrohr 4 erfolgt, entwickeln sich keine Gase mehr.When the furnace is heated up and the investment material is annealed, the Developing gases are not harmful to the ceramic mass because they are after pull off the top. When executing the casting, it is done by suction through the suction tube 4 occurs, no more gases develop.

Claims (1)

PATENT-ANSPRUcii Keramischer Schmelz- und Gießofen für zahntechnische Zwecke nach Patent 394952 dadurch gekennzeichnet, daß ein Saugrohr (4) aus Quarz o. dgl. an den aus gleichem Baustoff hergestellten, gasdichten Tiegel (a) angeschmolzen ist, zu dessen Beheizung elektrische Widerstände, z. B. Silitstäbe, dienen. PATENT ANSPRUcii Ceramic melting and casting furnace for dental purposes according to patent 394952, characterized in that a suction tube (4) made of quartz or the like is fused to the gas-tight crucible (a) made of the same building material; z. B. Silitststabs, serve.
DEE31942D 1922-01-18 1925-01-26 Ceramic melting and casting furnace for dental purposes Expired DE428770C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE31942D DE428770C (en) 1922-01-18 1925-01-26 Ceramic melting and casting furnace for dental purposes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEE27588D DE394952C (en) 1922-01-18 1922-01-18 Ceramic melting and casting furnace for dental purposes
DEE31942D DE428770C (en) 1922-01-18 1925-01-26 Ceramic melting and casting furnace for dental purposes

Publications (1)

Publication Number Publication Date
DE428770C true DE428770C (en) 1926-05-17

Family

ID=41096377

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE31942D Expired DE428770C (en) 1922-01-18 1925-01-26 Ceramic melting and casting furnace for dental purposes

Country Status (1)

Country Link
DE (1) DE428770C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332279A1 (en) * 1983-09-07 1985-04-04 bfb dental GmbH, 6451 Ronneburg CASTING DEVICE FOR DENTAL WORK

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332279A1 (en) * 1983-09-07 1985-04-04 bfb dental GmbH, 6451 Ronneburg CASTING DEVICE FOR DENTAL WORK

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