Cleaning Porcelain Dishes Prior To Glazing

The Problem

A manufacturer of fine porcelain dinnerware products had a problem with dust ruining the finish on their dishes. Dust particles were adhering to the surface of the dishes and created imperfections that were greatly magnified once the glaze was applied. Prior to glazing, they made many attempts to blow the dust particles away using ordinary air nozzles, which had little effect, if any. There were abundant rejects.

The Solution

They installed (3) Model 112018 18” (457mm) Gen4 Super Ion Air Knives to surround each dish, neutralise the static charge and remove the dust particles. Any airborne particulate was immediately vacuumed away by their dust collection system. The dishes were completely smooth to the touch with no imperfections.


A similar problem used to plague automotive manufacturers. The static charge generated by the automobile body tack off operation would cause the car body to attract stray particles of priming dust. Once the paint hits a dust particle, it sticks out like a sore thumb and ruins an otherwise perfect robotic paint job. The Gen4 Super Ion Air Knife is ideal here since it neutralises the charge and blows the dust away (in the direction of their dust collection system). To minimise compressed air use for these applications, we recommend the use of an EXAIR EFC Electronic Flow Control that automatically turns off the compressed air when no part is present.

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