Vacuum generators - both of simple one and with multiple ejectors - operate using the Venturi principle. When feeding the generator with compressed air in port P, a depression is produced at connection U and at port R the feeding air is released. By interrupting to feed P, the vacuum effect in U stops. They work using compressed air at 4÷6 bar.
The simple vacuum generators are generally used for moving by means of cups non-porous objects or on equipment where the capacity and the vacuum degree requirements are very low.
The vacuum generators with multiple ejectors are instruments able to produce a maximum depression of 90% equal to a final vacuum of 100 mbar , with different suction capacities.
Cups are vacuum accessories which allow in an easy way to lift or to manipulate things, plates of other bodies, “difficult to grip” with traditional holding systems, because they have no grips or they are breakable or because they can easily be deformed.
VUOTOTECNICA cups are manufactured by compression under vacuum and they can be supplied in different compounds, the most common being:
This excellent compound has a hardness of 60 Shore, resists oil, fats, hydrocarbons, and gas. In addition to these chemicophysical characteristics, this compound has optimum mechanical characteristics making it suitable for heavy work involving jerking, squashing, impact, etc. It can resist temperatures up to 60-70º C.
- NATURAL PARA RUBBER
A compound with hardness 45 Shore. Compared to the oil-resistant rubber, it is extremely flexible, making it suitable for solving problems of difficult grip, like irregular shapes or surfaces. The chemicophysical characteristics are inferior to those of oil-resistant rubber and it cannot, for example, be used in contact with oil or grease. In compensation it has better mechanical characteristics.
It can tolerate temperatures of 50 to 60º C without alteration.
This compound has a hardness of 45 Shore. Because of its chemicophysical characteristics, it can be used in contact with oils, hydrocarbons, and gas, as with the oil-resistant rubber. Thanks to its excellent flexibility it can be used to grip loads with irregular shapes of surfaces, as with natural Para rubber. Its excellent heat resistance means it can be used in contact with surfaces at up to 250°C. Compared with the other rubber compounds described above, silicon rubber has poor mechanical resistance.
Other compounds can be supplied in order to find the best solution for the customer.