Reheat Stretch-Blow PET Bottles at 20% Lower Cost

A new line of rotary reheat stretch-blow molding machines is claimed to reduce costs up to 20% for blowing PET bottles of 0.25 to 3 liters.

A new line of rotary reheat stretch-blow molding machines is claimed to reduce costs up to 20% for blowing PET bottles of 0.25 to 3 liters. The new SBO Universal machines from Sidel Inc., Norcross, Ga., also boosts output by 12.5% over the company’s SBO Series 2—up to 1800 bottles/hr per mold. Even with higher output, preform heating times are unchanged, thanks to a new 40-mm-pitch oven that requires no additional heating power. Settings of all oven lamps are controlled from the PC operator station. Lamps are positioned to reduce electrical consumption by an average of 15%, says Sidel. The SBO Universal also boasts a product yield of 97%. A recycling belt keeps preforms from jamming, and if there is an overflow, they are automatically ejected onto orienting rollers and returned to the hopper. Ejection zones for poorly loaded or non-conforming preforms and bottles help limit shutdowns. For preform conditioning, Sidel has enhanced its oven technology for high repeatability and stability. Sidel also reduced the size and cost of the machine’s air compressor since there is 27% less dead space in the blowing-air circuits and reduced air-consumption needs. Mold changeovers are 20% faster due to a new patented mold-base concept and a new stretching stopper without a fastening device. With its new housing, oven side doors, catwalk for access to the feeder, and blowing-wheel frame, the SBO Universal reportedly offers better operator access and reduced maintenance costs. The new line includes six models with six to 20 molds and output rates from 10,000 to 36,000 bottles/hr. Amcor Packaging, Blythewood, S.C., recently purchased the first model, an SBO 16 (16 molds), to produce carbonated soft-drink bottles.