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Pressovac Jewellery

The system used by our Pressovac series casting machines was specially developped for dental labs where casting perfection is absolute: casting pieces have a very smooth surface, a very dense molecular structure and without defects like unproper filling,porosity and shrinkage. Metal is inserted into the crucible and the flask positioned on the cradle inside the casting chamber.

CASTING CYCLE is fully automatic..

The casting chamber is fully evacuated by vacuum before melting, followed by helium gas supply to create an inert atmosphere.Helium gas has an excellent gas fluidity which provides a cleaning effect of the molten metal and mould and guarantees a smooth filling of metal even of the most intricate patterns.The casting temperature is attained and low frequency pulses are given to vibrate and mix the molten metal by keeping it homogeneous. Temperature is controlled by an optical pyrometer up to 2100°C for platinum and steel and by an immersion type “S” thermocouple inside the graphite crucible up to 1450°C for gold,silver and bronze.

At this stage, just by pushing a button, the whole crucible/flask system will automatically rotate 90° and the metal, once poured in an homogeneous and controlled way into the flask, it is automatically pressurized to 4 bars by argon gas.This high and quick pressurization is indispensable to obtain a proper and homogeneous filling, even at low metal/flask temperatures, for gold, silver and bronze alloys and, above all, for platinum and special steels which have a very narrow melting interval, thus a very quick solidification. This results in a very smooth surface due to the effect of the vacuum and a dense, well compacted casting due to the “over pressure” of 4 bars, which benefits both thick and thin sections.

FEATURES OF THE PRESSOVAC SERIES

– Extremely robust water-cooled casting chamber

– Automatic tilt

– Rapid pressurization up to 3 bar, permitting lower metal and flask temperatures

COMPETITORS

Most of our competitors machines have relatively weak casting chambers which cannot, thus, be pressurized up to 4 bar; gas pressure has to be applied slowly to the molten metal after pouring.This necessitates significant raising of both flask and metal temperatures in order to achieve adequate filling, leading to porosity and rough surface problems due to these high temperatures. Also – the manual tilt which is also a feature of other machines can lead to inadequate filling due to slow pouring or, alternatively, metal spillage due this this being too rapid.

CRUCIBLES KITS

image.TE0QTX A100.561 Ceramic container for graphite liner for Au
A100.562 Interchangeable graphite liner (10 cc) for Au
A100.559 Ceramic crucible (10 cc) for Pt
A100.564 Silicon carbide crucible (20 cc) for Steel/Pd
Melting coil and crucible plate, supplied with the machine, are the same for all crucibles.PRESSOVAC machine will be supplied complete with all crucibles

Alimentazione / Electrical

Monofase / Singlephase 230 V – 50/60 Hz – 3,5 kW

Volume Crogioli / Crucible Volume

10 cc

Capacità Di Fusione / Melting Capacity

Au 24 kt min. 5 g – max. 180 g
Au 18 kt min. 5 g – max. 110 g
Ag min. 30 g – max. 100 g
Steel min. 10 g – max. 110 g
Pt min. 15 g – max. 110 g

Cilindri / Flasks

Ø min. 30 mm – Ø max. 90 mm
h min. 55 – max. 90 mm

Frequenza Di Lavoro / Working Frequency

70 kHz

Max Temperature

2.150 °C

Controllo Ottico / Optical Control

Pirometro ottico infrarosso (± 2% – 5%) / Optical pyrometer infrared (± 2% – 5%)

Vuoto / External Vacuum Pump

con pompa esterna 8m³/h – 0,005 mbar / with external vacuum pump 8m³/h – 0,005 mbar

Raffreddamento / Cooling Water Supply

ad acqua demineralizzata con resistività maggiore di 20K ohm/cm – 3 l/m – 3 bar con impianto di raffreddamento a circuito chiuso / demineralized water with resistivity over 20K ohm/cm – 2 liters/minute – 3 bar with system of cooling closed circuit

Aria Compressa / Compressed Air Supply

6 – 8 bar

Gas / Inert Gas Supply

Elio, Argon, Azoto / Helium, Argon, Nitrogen

Dimensioni / Dimensions

base 600 x 500 mm – h mm 580 mm

Peso / Weight

90 kg

Garanzia / Guarantee

12 mesi / 12 months

Video

Pressovac_IT@2Pressovac_IT@2
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Brochure PRESSOVAC 2013 ING FRONTEBrochure PRESSOVAC 2013 ING FRONTE
Brochure PRESSOVAC 2013 ING RETROBrochure PRESSOVAC 2013 ING RETRO

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