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Ultrasonics halve automotive parts rejects
Unhappy with the cleanliness of components sent by a subcontractor using a trichloroethylene degreaser, manufacturer of electro-mechanical devices turned to ultrasonics and halved rejects.
Kostal UK, manufacturer of electro-mechanical devices for the automotive industry, has resolved a consistency issue at its Goldthorpe site in South Yorkshire by enlisting the help of Kerry Ultrasonics.
Unhappy with the cleanliness levels of components supplied by a subcontractor using a trichloroethylene (trike) degreaser, Kostal invited Kerry to trial a similar unit on-site, to prove that dependable results could be achieved with the correct process.
The introduction of Kerry's Microsolve 250 mono-solvent ultrasonic cleaning system has improved cleaning quality and reduced reject rates by 46% - from a weekly average of 342 to 184.
It also meets current OEL regulations for the safe use of trike and can operate on environmentally-safe hydrofluoroether at a later date.
The Kerry machine removes forming oils and general ionic airborne contamination from 3-way and 8-way rotors and stators used in steering wheel stalks from Toyota.
Made from plastic and copper, and measuring 30mm in length, the parts must be effectively cleaned for an electronic strip to be satisfactorily welded to them.
Poor cleaning would lead to failure in service.
The PLC-controlled cleaning process has three stages.
After an ultrasonic clean in trike, components undergo a vapour rinse before dwelling in the freeboard to dry.
The system is automated with an Autotrans Single Axis lift, handling over 10,000 parts per week.
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