Dental furnace for producing compacted ceramics

Abstract

The aim of the invention is to provide a reliable and efficient operation of a dental furnace ( 1 ) for producing compacted ceramics, comprising a hood-shaped firing chamber ( 3 ), into which a muffle ( 5 ) can be inserted and which is closed during operation by a bottom plate ( 4 ), and a pneumatic cylinder ( 10 ) whose working pressure can be adjusted by a pressure reducer is mounted on the firing chamber ( 3 ). To this end, the invention provides that at least two pressure reducers ( 9 a , 9 b ) are each provided with a different working pressure or the pressure reducer is provided in the form of a proportional pressure regulator with electronically controllable different working pressures. The pressure reducers ( 9 a , 9 b , . . . ) or the proportional pressure regulator are/is coupled to a program unit, particularly to a memory card, inside of which different heating and/or compacting processes are stored.

1 . A dental furnace for producing compacted ceramics, comprising: 
 a hood-shaped firing chamber into which a muffle can be inserted and which is closed in operation by a bottom plate, with a pneumatic cylinder being mounted on the firing chamber whose working pressure can be set by means of a pressure reducer, wherein at least two pressure reducers are each provided with different working pressure or the pressure reducer is provided in the form of a proportional pressure regulator with electronically controllable different working pressures.    
   
   
       2 . A dental furnace according to  claim 1 , wherein the pressure reducers are arranged on a plate-like support basis.  
   
   
       3 . A dental furnace according to  claim 2 , wherein a pneumatic and/or electronic control unit is provided on the support basis whose lines and/or cabling is introduced from below into the at least one duct in a guide column.  
   
   
       4 . A dental furnace according to  claim 1  wherein three pressure reducers are provided which each provide a working pressure of 4, 5 and 6 bar in particular.  
   
   
       5 . A dental furnace according to  claim 4 , wherein the input or system pressure in the pneumatic line is approximately 10 bar.  
   
   
       6 . A dental furnace according to  claim 1  wherein the guide column comprises at least two ducts with lines to the pneumatic cylinder and electric cables being guided separated from another.  
   
   
       7 . A dental furnace according to  claim 1  wherein the firing chamber is suspended at the upper end of the guide column.  
   
   
       8 . A dental furnace according to  claim 1  wherein the pneumatic lines are monitored by pressure sensors which are connected with an electronic control unit.  
   
   
       9 . A dental furnace according to  claim 1  wherein the pressure reducers or the proportional pressure regulator are coupled with a program unit, especially a memory card, in which different heating and/or compacting processes are stored.  
   
   
       10 . A dental furnace according to  claim 1  wherein outlet slots for lines or cables are provided in the upper/lower region of a duct.