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The changing production needs in foodstuff baking and
pasteurising insistently call for continuous cycle machines
that are capable of baking and pasteurising food at very
high hourly output rates. The Pugnale tunnel described
is capable of performing continuous pasteurisation and
baking of any food product (to be conveyed either on trays,
or loose on a belt).
These tunnels can also be integrated with existing refrigerating
tunnels on the same line, so after the pasteurising and
baking process the product is automatically transferred
to the next processing cycle, into another tunnel where
it is cooled or frozen.
Because of the know-how we have acquired in sterilization
for the pharmaceutical industry, we are able to obtain
the best possible temperature uniformity throughout the
tunnel’s inner hot chamber, thus we can meet any
pasteurising or baking requirements, from the simplest
to the most complex.
The air heating process takes place inside an insulated
compartment above the tunnel’s hot chamber and is
carried out by means of a heater that is equipped with
a burner. This burner can be supplied with conventional
fuel.
Recycled air will not come into direct contact with the
flame, but is heated by the high temperature that forms
inside the high performance section of the furnace pipes.
Temperature uniformity is obtained thanks to two plenums
– a delivery plenum and a return plenum –
that fully cover both vertical, opposing walls in the
hot chamber. Air distribution in the tunnel chamber is
obtained by means of a horizontal laminar air flow system
and is uniform throughout, on all chamber surfaces.
The system is built in such a way as to ensure that when
the doors are open, all the tunnel inner areas are accessible
and easy to clean at the end of each working cycle.
Highly efficient insulating materials, i.e. high-density
rock wool, have been used to insulate the walls.
The machine is manufactured in accordance with applicable
regulations and is supplied with a certificate of conformity
with European Directive EEC 89/392.
Functional description of the machine
This spiral tunnel is suitable for the continuous baking
or pasteurising of your foodstuffs.
The machine is designed to have a very long conveyor belt
installed inside a heated box.
The belt will wind itself around a rotary drum, forming
a spiral shaped circuit.
The product can be loaded onto and unloaded from the belt
manually or, again, automatically – if the system
is integrated into an in-line processing system. |