The magnetic field produces a stirring effect throughout the melting mass which is visible during the melting process and which guarantees the temperature uniformity of the molten metal. Moreover unlike the electric casting machines using the heating elements, temperatures over 2000 °C are reached without jeopardizing any part of the machine. For example 50 seconds are sufficient to melt 40 grams chrome-cobalt- molybdenum.
The power output is finely adjustable and works on stepless power positions which is a requirement when melting precious alloys. The high centrifugal acceleration and the vacuum/pressure casting methods are considered the best systems to obtain thin and compact casting pieces, mechanically suitable to the most demanding casting needs.
With the infrared optical temperature controller it is possible to read and hold the casting temperature, to obtain the complete fluidity of the metal which will be cast into the flask and reach the thinnest parts of the model. Each of over 150 dental alloys emits a different light, named “emissivity” that is detected by the photodiode and converted into temperature degrees with a precision ranging from 2% to 5% ±
An accurate and long research has been carried out into the quality and shape of the crucibles. The quality to ensure the original purity of the alloys and the shape to guarantee a smooth metal flow into the flask.
A special device supplied on request, prints the “CASTING PROTOCOL” on which all casting parameters such as alloy type and quantity, casting temperature, labora- tory name and date are recorded.
Electronic Induction Vacuum/Pressure Casting Machine
It is well known that electronic induction melting is the best system for melting metals and the possi- bility of melting and casting under vacuum allows a higher purity and homogeneity thus exploiting all metallurgical properties of the alloys. Castings of high quality are formed under vacuum since the molten alloys reach the thinnest parts of the model and solidify under pressure.
All dental alloys, non-precious and precious, improve their properties with vacuum which is essen- tial for alloys containing titanium.
– higher purity of casting
– greater homogeneity
– better resistance to corrosion
– prosthetic frames with minimum thickness
– reduced reaction of molten alloy with investment
– reduced casting oxide inclusions due to the absence of nitrogen and oxygen
– 1948 produces casting machines for precious dental alloys
– 1957 manufactures the world’s first induction centrifugal casting machines for dental applications
– 2004 creates a new induction vacuum/pressure casting machine by a tilting system
Easy installation and extremely simple to use thanks to a graphic control panel, which supplies the nec- essary information and leads the operator through the complete casting process.
The induction heating has no temperature limits
and, unlike machines using electric heating ele- ments, it requires only a little maintenance. Auto-diagnostic device to show irregular functions. Blue filter to protect the eyes from the light resulting from high temperatures.
SPACE SAVING DESIGN, RAPID AND HIGH PRODUCTIVITY
After having loaded the crucible with metal and placed the mould into the casting chamber, a fully automated electronic control system ensures a successful melting and casting cycle under vacuum. By means of a push- button the molten metal is poured into the mould under vacuum and then pressurized precisely on completion of the pour. After 60 seconds the pressure is released, the casting chamber opened and the machine is ready to begin a new casting cycle.
PRESSOVAC offers a high degree of work safety and ease of use to cast any prosthetic pattern in all dental casting alloys (pure titanium and nickel alloys excluded) without requiring any special sprueing technique.
A metal support table fitted with wheels supplied on request, accepts the PRESSOVAC
unit, the optional ancillary tank of the compressed air, the closed circuit water cooling system and the vacuum pump.
Ceramic silicon nitride crucible with high resistance for c.c.m., titanium alloys – capacity from 5 to 80g and palladium alloys
Ceramic crucible for precious alloys with palladium contents – capacity from 15 to 80g; for no precious alloys – capacity from 15 to 80g
Ceramic crucible, larger type – capacity 100g of: c.c.m. – titanium alloys – precious alloys containing palladium and for ceramic non precious
Ceramic container for graphite liner
Suitable for normal precious alloys (without palladium)
capacity from 5 to 60g
Interchangeable graphite liner
Special cover for graphite crucible