Powder enamel equipment
As shown in our presentation, powder enameling has many benefits compared to traditional wet
enameling.
Beneath some pictures of powder enameling systems for respectively cookers &
boilers.
The core of every powder enamel system is the application equipment. The type
of application equipment, their set-up and utilized parameters determine the
first pass transfer efficiency of the dry powder enameling processes. This
transfer efficiency is very important, because (although powder enameling may
achieve almost 100% material utilization) powder enamel tend to lose it
electrostatic properties when recycled too often or over long distances.
Studies showed that recycled powder is hydroscopic & therefore more sensitive
for humidity then virgin powder and damp powder has a poor adhesion to the metal
substrate. For this reason powder enameling systems are sometimes placed in a
clean room with closed-loop air-conditioning system to maintain constant
temperature and relative humidity.
The picture above shows the complete powder cycle at a modern powder
enameling system; from automatic enamel supply from a drum unloader,
sieving/mixing/fluidizing in a rotary sieve, automatic spraying, recovery of oversprayed powder with cartridge filters and recycling back into the rotary
sieve via a magnetic separator.
Leading manufacturers of powder enamel systems (in alphabetic order) are : Eisenman, ITW Gema, Nordson, VET & Wagner-Itep.
Ditmer Trading & Consulting B.V. provides
independent
consultancy to the international enameling industry.
Click here for our contact
details
Below two video's showing the electrostatic application of powder enamel inside
respectively a baking oven and large solar boilers
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