Tunnel washer degreases and protects

A versatile four-stage conveyorised Marr-Line tunnel washer is degreasing and protecting a range of metallic - brass, aluminium and iron - automotive starter motor parts.

Guyson International has recently installed an incredibly versatile four-stage conveyorised Marr-Line tunnel washer into an automotive component-manufacturing factory in Hungary.

This flexible washer allows a range of metallic - brass, aluminium and iron starter motor parts, to be completely degreased of oil, grease and shop dirt and provide a protective rust preventative coating at the same time.

The varied individual small components are placed into wire baskets, ready for marshalling to assembly, prior to entering the double wash, rinse blow off and dry tunnel washer.

This simple production method allows a very wide range of components to be cleaned and gives the flexibility of the future component mix to change as further projects are added to the production timetable.

Washing is achieved in two high-pressure spray-washing chambers with the 100 litre/min stainless steel vertical pumps flushing wash solution through directed wash jets, creating a deluge of cleaning force.

The baskets sit on a cross rod conveyor of 155mm pitch that allows maximum access for the underneath wash jets to penetrate the parts, providing excellent 360 degree component washing.

This type of conveyor also provides maximum strength and stability with a fully loaded machine.

An auto-dosing unit is fitted on the first wash tank to maintain accurate wash strength solution and there are three extension sections throughout the machine to promote drainage between tanks, lessening cross contamination.

Additionally this first wash unit is equipped with an external Guyson tramp oil separator, to remove the worst excesses of oil contamination from the cleaning solution thus extending the cleaning solution life and maintaining its effectiveness.

The components continue on their path through to the third chamber, which can be used as a straightforward rinse section to remove any final traces of wash solution.

Or on the iron components can be used with rust preventative solutions or can be switched off.

Each of the tanks can be independently and quickly, drained, filled with differing solutions, i.e specialist detergents for ferrous and non ferrous detergents, used or not used, giving a unique flexibility of component cleaning.

The final section is fitted with a full width heated air knife, angled to shear off as much residue moisture as possible before entering the in-line heater box, operating at 110 deg C; parts then exiting onto a 500mm out-feed extension fitted with photo electric cell to stop the conveyor when the basket reaches the end.

Prospective users of its manual or automated wash systems are encouraged to submit sample components for free feasibility testing to the companies extensive development workshop at Skipton, England.

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