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February 2010
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Machinery News


Reducing blow moulding costs

While Canadian Amsler Equipment has introduced an electric reheat stretch blow moulding machine that saves 50% energy costs, German Krones has developed the MouldXpress Advanced system to reduce mould changeover times by up to 75%.

Amsler’s five-cavity all-electric unit meets the high-output needs of custom blow moulders of PET containers and is the first five-cavity PET reheat machine to be built in Canada. It is said to reduce tooling costs and eliminates the need for two blow moulding machines to serve medium-volume markets, according to President Werner Amsler. The fully automatic machine makes 1.5 l containers at a rate of 7,000/hour. It can also be used to run one-cavity and two-cavity moulds for production of 2 to 4 l containers. Neck sizes range up to 43 mm.

The 50 tonne clamping force L515 convertible features servodriven electric stretch rods rather than pneumatic types. The new model offers advantages like high output per cavity, energy savings of 50%, greater precision, smaller footprint, faster speed, reduced maintenance and quicker mould changeovers, according to Amsler. An air-recovery system and hot-fill capability is also available. The first commercial unit is expected to be built by June. It will be located at Amsler’s testing lab in Richmond Hill and will be available for demonstration and customer trials.

Meanwhile, Krones’s system, which is integrated with its Contiform stretch blow moulding machine in the blowing wheel, shortens the changeover time from about 3.5 minutes to less than 1 minute per blow moulding station. Though Krones offers rotary blow moulding machines with 8-40 blowing stations, the MouldXPress Advanced is only offered on the S16 to S28 series machines that have 16-28 mould cavities and for relax-type moulds with neck cooling.

The different mould sets on the new system, which does not require additional tooling, are stored in a changing trolley, with the trolley's compartments labelled to avoid incorrect identification of the moulds.

 

 

 
 
 
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