Coneyorised washer treats 90 pressings per hour

A continuous flow of newly punched and press-formed steel components, measuring up to 1160mm long and up to 600mm wide, are now being automatically degreased, washed, rinsed and dried.

A continuous flow of newly punched and press-formed steel components, measuring up to 1160mm long and up to 600mm wide, are now being automatically degreased, washed, rinsed and dried ready for seam welding and assembly, at rates of up to 90 components per hour, using a newly designed 3-stage version of a Guyson Marr-Line 600/200 conveyorised aqueous washer.

Special facilities have been built into the system to ensure that both sides of each pressing can be cleaned and dried simultaneously within the target time of 40 seconds.

The installation has been extended to 7.5 metres overall and includes two extra 1metre long process chambers positioned between the wash and rinse and the rinse and dry operations to allow more time for draining off and to minimise the carryover of solution from one process to the other.

A series of ambient and heated air knives is positioned at the end of each chamber where a break in the conveyor allows the lower positioned air knives access to the underside of the component.

The number and capacity of the process storage tanks in use has been increased.

Both wash and rinse solutions are heated in larger 300 litre tanks and delivered under pressure through adjustable wash jets fitted to galvanised spray bars positioned around and below a galvanised steel honeycombed mesh conveyor.

Measures have been taken to satisfy environmental concerns associated with the removal and subsequent disposal of process by products such as oil and shop dirt.

These contaminants are removed from both solutions by an in-line 200 micron washable filter element fitted between the pump and spray jets.

An additional superfine 40-micron filter with disposable element is fitted to the rinse section.

A weir-type oil separator processes all used wash tank solution and weirs off tramp oil into a separate 150 litre Oil collection tank.

Oil globules remaining in solution are removed by a coalescing filter media bed before it is pumped through a removable filter basket into the wash tank to be reheated and recirculated.

A sump pump is piped to both tanks which can be emptied independently into either one of two extra 360-litre waste water tanks which can be dedicated to either wash or rinse solutions.

Both waste tanks can be conveniently coupled up to vacuum recovery equipment for safe removal of the contents and subsequent disposal off-site.

This new Marr-Line machine is from a range of washers based on a pre-engineered modular concept which permits standardised parts and assemblies to be configured to meet individual customers application requirements at relatively low capital cost when compared with completely, unique special machines or large general purpose wash systems.

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