Bottle machine with 24 cavities
SIPA of Italy, a maker of PET stretch blow moulding machines, has released the third generation SFR EVO machine that is available in versions with 6, 8, 12 and 16 cavities with plans to release 10, 20 and 24 cavity models.
Features of the EVO3 include new designs in the clamp unit and a maximum output rate of 2250 bottles an hour per cavity.
A new compact blowing valve block has 35 per cent less dead air volume and “green” ovens reduce electrical consumption by up to 40 per cent while keeping process conditions stable, due to the use of new lamps and special materials and coatings for the reflectors.
With electric drives, there is no need for a stretch rod decelerator and the stretching cam, which further reduce product change-over times. The electric stretching system on the SFR EVO3 also has a ‘smart’ self-learning procedure to identify preform/bottle dimensions.
The machines take advantage of mechanical compensation in the blowing process. In traditional pneumatic compensation, the total stroke is made with high pressure blowing air, but in SIPA’s mechanical system, high pressure blowing air is used only on the final fraction of a millimetre of the stroke. This leads to a significant reduction in air consumption, particularly with smaller bottles. Only a cavity change is needed to switch from production of one type of container to another.