Specialised washer for larger plastic bins

With the Guyson Marr-Line 1000/3 conveyorised wash and dry system, larger, reusable tote bins and trays can be cleaned and dried, getting rid of production stains, oils, contaminants, and odours.

This leads to improvements in quality assurance; protection of components and all importantly minimises cross contamination from one usage of the tote bin to the next.

The largest machine in the range is now the Marr-Line 1000/3, a three-stage washing and drying system specially built to process a range of plastic tote bins, up to a maximum of 100cm wide by 50cm high.

The latest installed machine has an overall length of 1021cm, which along one side is complemented by a 900cm long, power operated, return feed roller conveyor.

The high-pressure spray-washing chamber now has an extended length of 170cm, though this represents less than 30% of the total process conveyor length of 600cm, the remaining 70% being devoted exclusively to drying operations.

Positioned immediately after the wash chamber is an air wash compartment designed to minimise carryover of wash solution.

This houses a series of three overhead-positioned and two side-positioned air knives which blow high velocity ambient air over the component to disperse as much carryover wash solution as possible from the bins surface before entering the first of two hot air dryers.

Together these provide a long, hot air, double drying facility; a direct driven centrifugal fan in each drier delivers convected hot air produced by a 9 kW blower through a series of louvres positioned above and below the conveyor.

A major percentage of the air is re-heated and recirculated back to each fan, the remainder being exhausted to atmosphere.

The operating temperature is monitored and controlled from a digital indicator backed up by a separate excess temperature cut out.

All the tote bins are manually loaded on the in-feed section of the conveyor and after processing arrive at the out-feed section; at this point they slide down the gravity roller conveyor, coming to rest against a mechanical stop.

A sensor detects arrival and activates the transfer mechanism, which carries the bin sideways on to the powered roller return conveyor that takes the bin back to the loading and offloading area.

Thus facilitating one operator to be able to load and unload the machine.

During transfer, should a newly processed bin arrive at the end of the outfeed conveyor the machine conveyor stops and only restarts when the transfer system has returned to it's park position.

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