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Webinar: Liquid handling Event by Festo UK & Ireland

On-line webinar

01/12/2020(10:00-11:00)

How pressure-over-liquid provides precise, accurate and cost-effective throughput Precise and accurate (more)

Southern Manufacturing

Farnborough, Hants(GU14 6TQ)

20/04/2021 - 22/04/2021

Southern Manufacturing and Electronics is the most comprehensive annual industrial exhibition in the (more)

PPMA Show 2021

NEC, Birmingham(B40 1NT)

28/09/2021 - 30/09/2021

PPMA Show 2021 will be the UK’s largest ever event dedicated to state-of-the-art processing and (more)

Advanced Engineering 2021

NEC Birmingham(B40 1NT)

03/11/2021 - 04/11/2021

Join us in our 12th and most important edition to date, as we invite engineers and management from all (more)

Compact actuator delivers reliability for film winding

When bpi.films needed to replace worn out and obsolete actuators at the end of a process line they were faced with a few problems. Their replacements needed to match the fixing centres and diameter of the failed mechanisms and be sufficiently compact so as not to impinge on the nearby drive system. The Framo Mini 3 actuator from RA Rodriguez proved to be the ideal solution.

Part of British Polythene Industries, bpi.films is the UK's leading manufacturer of shrink films, converter film and pallet stretch film. Its continuous investment in the most advanced film manufacturing technologies has allowed the company to produce an innovative and diverse range of films which package, protect and secure a wide variety of products in a host of industry sectors.

The Framo Mini 3 actuators are responsible for transferring a fully wound roll of film, weighing approximately 1,000 kg, from the process line onto a trolley for further handling. For the winding process the roll is held on an expanding mandrel which releases its grip when the roll is full. This allows the finished product to roll down guideways into moon shaped locators at the end of two radius arms. The two Framo actuators work in parallel at either side of the machine.

With the roll safely cradled in the locators, the operator initiates the actuators that expand, lowering the roll by 45° onto the waiting trolley for despatch. The actuators then return to the waiting position. They both have a 300mm stroke length, operate at a speed of 47mm/sec and with a stroke force of up to 8,000N. For this application, it is critical that both actuators travel at exactly the same speed - this is achieved by integrating an inverter between the actuator and power supply.

For bpi.films the compact nature of the Mini 3 was vital as it allowed the actuator to be retrofitted with minimal modification. Whilst many actuators have bulky external motors, the Mini employs a powerful coaxial motor to achieve the required stroke in minimum space. A number of features ensure the Mini's reliable operation. These include a thermally protected motor, life time lubrication and integral safety switches. This reliability is complemented by economical operation, low maintenance and a long service life.

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Compact actuator delivers reliability for film winding

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