WO2013068312A1 - Four dentaire, et procédé pour laisser refroidir un four dentaire - Google Patents

Four dentaire, et procédé pour laisser refroidir un four dentaire Download PDF

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Publication number
WO2013068312A1
WO2013068312A1 PCT/EP2012/071821 EP2012071821W WO2013068312A1 WO 2013068312 A1 WO2013068312 A1 WO 2013068312A1 EP 2012071821 W EP2012071821 W EP 2012071821W WO 2013068312 A1 WO2013068312 A1 WO 2013068312A1
Authority
WO
WIPO (PCT)
Prior art keywords
access opening
combustion chamber
dental oven
closure element
housing
Prior art date
Application number
PCT/EP2012/071821
Other languages
German (de)
English (en)
Inventor
Wolfgang Rauh
Thomas BAHOLZER
Michael GÖDIKER
Original Assignee
Vita Zahnfabrik H. Rauter Gmbh & Co. Kg
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
Application filed by Vita Zahnfabrik H. Rauter Gmbh & Co. Kg filed Critical Vita Zahnfabrik H. Rauter Gmbh & Co. Kg
Publication of WO2013068312A1 publication Critical patent/WO2013068312A1/fr

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
    • F27B17/025—Furnaces of a kind not covered by any preceding group specially designed for laboratory use for dental workpieces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices

Definitions

  • the invention relates to a dental oven and a method for operating a dental oven in order to allow the kiln to cool.
  • ceramic or other denture materials e.g. base metals (such as zirconium) are fired or sintered at high temperatures of up to 1500 ° C. or 1600 ° C. in so-called sintering furnaces.
  • the duration for which the kiln must remain in the dental oven not least depends on the time interval during which the combustion chamber and thus the kiln is cooled until finally the combustion chamber can be opened.
  • US-A-4,498,865 discloses a dental oven for burning ceramic material on metal, wherein the housing part of the furnace, which surrounds the combustion chamber, can be lifted and lowered relative to a fixed support plate on which the firing material is located by a linear process , To control the reduction of the combustion chamber temperature during a combustion process, the combustion chamber housing part is alternately raised and lowered.
  • DE-A-10 2006 032 655 describes a dental oven in which the combustion chamber is heated and opened during a predrying phase.
  • the object of the invention is to shorten the cycle times of dental ovens and in particular their cooling phases.
  • the dental oven in a controlled manner more and more starting from the operating temperature at the end of the firing process, wherein care must be taken that the firing material is not exposed to thermal stress cracks causing temperature gradients.
  • the feature of the gradual opening of the dental oven will be realized according to the invention in a dental oven, in which the closure member and the combustion chamber having the housing part are linearly relative to each other movable to release the access opening of the combustion chamber or close. This is primarily the case with a dental oven, in which the access openings of the combustion chambers are formed on the underside of the dental oven housing, with the closure element being vertically movable against this underside or from this underside (lifting or lifting mechanism).
  • the closure element is the like on a column or the like.
  • Carrier out which also carries the housing of the dental oven.
  • the entire construction of housing and pillar or support is usually on a pedestal or foot, to which the closure element can be moved down.
  • This concept can also be reversed by the Housing is raised or lowered relative to the closure member to release the access opening or to close.
  • Other opening mechanisms such. B. slide or the like. as closure elements are conceivable.
  • the temperature prevailing in the combustion chamber or the temperature of the combustible material is sensory or computationally detected or determined and that the AnSteuerü for the closure element of this for increasing release of the access opening of the combustion chamber or increasing Exposure of the combustible in compliance with a specifiable combustion chamber or Brenngut- Abklingtemperaturkurve drives.
  • the heating unit With the beginning of the release of the access opening you will disable the heating unit as a rule. However, it may be desirable to keep the heating unit still active (with its heating power being able to be reduced with increasing release of the access opening or combustible) in order to be able to actively influence the degree of cooling of the combustible to such an extent.
  • the dental oven cools (with the heating unit normally switched off) by opening the dental oven already at the extremely high firing operating temperatures of up to 1600 ° C. and that at first minimal and then with increasing cooling of the combustion chamber or the combustible more and more.
  • the process of releasing the access opening or the exposure of the combustible material can be carried out continuously or in individual steps or quasi-continuously.
  • the speed with which the dental oven is opened for cooling depends not least on the design of the dental oven and in particular on the design of the access opening and the closure element or of the closure system of the dental oven. Particularly good and high cooling rates without the risk of deterioration of the combustible could be achieved in dental ovens, in which the closure element is moved from below against the combustion chamber access opening or is moved away from the access opening.
  • FIG. 1 shows a perspective view of a dental oven with the closure element for closing the combustion chamber, from below against its access opening movable closing element and Brenngutabilityelement and
  • FIG. 1 perspective views of the dental furnace according to FIG. 1 in different degrees of opening of the combustion chamber or different degrees of exposure of the combustible material.
  • Fig. 1 shows a dental oven 10, which can be operated at sintering operating temperatures of up to 1600 ° C.
  • the dental oven 10 has an overhead housing 12 with a combustion chamber 14 formed therein.
  • the housing 12 further includes a heating unit indicated at 16.
  • the housing 12 of the dental oven 10 is located at the upper end of a vertical support column 18, which rises from a foot or base part 20.
  • the foot or base part 20 has various operating elements 22 and a display 24.
  • a vertical guide unit 26 is formed for a closure element 28.
  • the closure element 28 is thereby guided movably in the vertical direction on the support column 18.
  • An access opening 32 which can be closed by the closure element 28 when it is raised against the underside 30, is formed in the lower side 30 of the housing 12 of the dental oven 10 facing the base or seat part 20 becomes.
  • the firing element indicated at 34 rests on the closure element 28, which in this exemplary embodiment is received by a sintered crucible 36 which rests on a so-called firing base 38.
  • the combustion chamber 14 is opened by controlled lowering of the closure element 28, initially to a minimal extent, so that the kiln 34 is not exposed to an excessive temperature gradient and thus thermal stress cracks can not arise.
  • the closure element 28 is lowered more and more (see Figures 2 to 4) until the kiln 34 is finally completely exposed or the combustion chamber 14 is fully opened.
  • the controlled opening of the dental oven 10 is effected by an indicated at 40 AnSteuerü for controlling the motor drive of the closure element 28.
  • This control can be time or temperature controlled, in the latter case expediently in the combustion chamber 14, a 42 indicated temperature sensor is arranged, the Temperature in the combustion chamber 14 and the temperature of the Brennerguts 34 detected.

Landscapes

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

Abstract

L'invention concerne un four dentaire comprenant un boîtier (12), une chambre de cuisson (14), disposée dans le boîtier (12), présentant une ouverture d'accès (32) et une unité de chauffage (16) servant au chauffage de la chambre de cuisson (14). Le four dentaire (10) présente en outre un élément de fermeture (28) pouvant être actionné automatiquement, pour libérer et fermer l'ouverture d'accès (32), l'élément de fermeture (28) et le boîtier (12) étant déplaçables, exclusivement linéairement l'un par rapport à l'autre, pour libérer progressivement l'ouverture d'accès (32) et pour fermer cette dernière. Le four dentaire est en outre pourvu d'une unité de commande (40) servant à commander l'élément de fermeture (28) et/ou le boîtier (12), pour libérer et fermer l'ouverture d'accès (32). Après arrêt d'un processus de cuisson, et en fonction de l'état de fermeture de l'ouverture d'accès (32), ainsi que d'une température régnant encore dans la chambre de cuisson, l'unité de commande (40) commande l'élément de fermeture (28) et/ou le boîtier (12), en vue d'un refroidissement accéléré de la chambre de cuisson (14), afin de libérer de manière croissante l'ouverture d'accès (32) et/ou le produit soumis à la cuisson (34).
PCT/EP2012/071821 2011-11-07 2012-11-05 Four dentaire, et procédé pour laisser refroidir un four dentaire WO2013068312A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11188046 2011-11-07
EP11188046.4 2011-11-07

Publications (1)

Publication Number Publication Date
WO2013068312A1 true WO2013068312A1 (fr) 2013-05-16

Family

ID=47116009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/071821 WO2013068312A1 (fr) 2011-11-07 2012-11-05 Four dentaire, et procédé pour laisser refroidir un four dentaire

Country Status (1)

Country Link
WO (1) WO2013068312A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015121364A1 (fr) * 2014-02-12 2015-08-20 Sirona Dental Systems Gmbh Four de frittage pour composants en matière frittée, en particulier pour composants dentaires
WO2017144488A1 (fr) * 2016-02-22 2017-08-31 Sirona Dental Systems Gmbh Four à chambre de combustion agencée verticalement pour éléments dentaires et support résistant à la chaleur
CN111189323A (zh) * 2020-01-07 2020-05-22 合肥华特义齿加工有限公司 牙科实验室烧结炉
US11628048B2 (en) * 2017-04-12 2023-04-18 Ivoclar Vivadent Ag Dental treatment device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498865A (en) 1982-08-25 1985-02-12 Dentsply Research & Development Corp. Procedure for firing dental porcelain on metal
GB2201495A (en) 1987-02-26 1988-09-01 Albert George Docx Furnace
DE19542984C1 (de) 1995-11-17 1996-12-12 Ivoclar Ag Brennofen
DE102006032655A1 (de) 2006-07-13 2008-01-17 Zubler Gerätebau GmbH Dentaltechnikofen und Verfahren zur Positionssteuerung einer Verschlussplatte an einem Dentaltechnikofen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498865A (en) 1982-08-25 1985-02-12 Dentsply Research & Development Corp. Procedure for firing dental porcelain on metal
GB2201495A (en) 1987-02-26 1988-09-01 Albert George Docx Furnace
DE19542984C1 (de) 1995-11-17 1996-12-12 Ivoclar Ag Brennofen
DE102006032655A1 (de) 2006-07-13 2008-01-17 Zubler Gerätebau GmbH Dentaltechnikofen und Verfahren zur Positionssteuerung einer Verschlussplatte an einem Dentaltechnikofen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015121364A1 (fr) * 2014-02-12 2015-08-20 Sirona Dental Systems Gmbh Four de frittage pour composants en matière frittée, en particulier pour composants dentaires
CN105980801A (zh) * 2014-02-12 2016-09-28 西诺德牙科设备有限公司 用于烧结材料构件、尤其是用于牙科构件的烧结炉
EP3132217B1 (fr) 2014-02-12 2018-04-04 Sirona Dental Systems GmbH Four de frittage pour composants en matière frittée, en particulier pour composants dentaires
DE202015009956U1 (de) 2014-02-12 2022-01-10 SIRONA Dental Systems GmbH Dentalsinterofen für Bauteile aus Sinterwerkstoff, insbesondere Dentalbauteile
US11306969B2 (en) 2014-02-12 2022-04-19 Dentsply Sirona Inc. Sintering furnace for components made of sintered material, in particular dental components
US11650014B2 (en) 2014-02-12 2023-05-16 Dentsply Sirona Inc. Sintering furnace for components made of sintered material, in particular dental components
WO2017144488A1 (fr) * 2016-02-22 2017-08-31 Sirona Dental Systems Gmbh Four à chambre de combustion agencée verticalement pour éléments dentaires et support résistant à la chaleur
US11073334B2 (en) 2016-02-22 2021-07-27 Dentsply Sirona Inc. Furnace having vertical arrangement of the combustion chamber for dental components and heat-resistant base
US11628048B2 (en) * 2017-04-12 2023-04-18 Ivoclar Vivadent Ag Dental treatment device
CN111189323A (zh) * 2020-01-07 2020-05-22 合肥华特义齿加工有限公司 牙科实验室烧结炉

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