Visited the Tecnargilla 2018 show in Rimini some weeks ago and saw there a new application method called “Steam Spraying”.
Continue reading “Steam spraying improves application”
Porcelain enamel may be applied via a variety of wet application methods, such as dipping, flow-coating, slushing and spraying.
Originally application of porcelain enamel was done manually, as shown at the pictures below.
With increasing labor cost and production volumes, manual application was replaced by automatic application. In order to reduce enameling cost and/or improve the coating quality, more advanced applications systems, such as electrostatic wet spraying, robot spraying and electrophoresis, where introduced in the 50’s and 60’s.
Nowadays wet enamel is typically used for small production runs (of special colors), special enamels and/or when the product design isn’t suitable for electrostatic dry application.
Well-know liquid enamel application equipment producers include : Binks, Devilbiss, ECCO, EIC, Eisenmann, Fisher, Sames, VGT.
DTC may assist you to evaluate, which application method and/or equipment is most suitable for your products, and if required also help you with sourcing / procuring the appropriate machines.
Related topics :
- Wet enamel preparation
- Enamel slip testing
- Enamel consumption calculation
- Transfer efficiency & material utilization calculation
- Pumps for enamel slip
- Powder enamel application
Prior to the actual application, porcelain enamel slip need to be prepared in accordance with the application requirements, such as fineness, set and specific gravity.
The traditional wet enamel preparation process (“milling”) consists of the following seven sequential steps :
- weighting of various frits & additions in accordance with the milling formulation
- loading ball mills
- adding water
- wet milling
- discharging ball mills
- sieving & magnetic screening of slip
Continue reading “Wet enamel preparation & milling”