|
A
perfect surface needs defined and reproducible process parameter
Each blasting process is based on the theory "mass x
velocity = energy". This is equal to the crash effect of the blasting
medium which is applied to influence the surface of an object
Negative
pressure
Most
of the conventional
blasting processes take place in a closed cabin under a slight negative
pressure. The negative pressure is necessary 1) in order to achieve the
optimum media separation between closed and returning medium, and 2) in order
to reduce the dust to obtain a good sight into the cabin. The negative
pressure influences the crash energy of the blasting medium just like the
preset blasting pressure. The negative pressure must be added to the
acceleration energy and must be kept constant as one of the process
parameters. As we can't avoid a change of the filter condition in course of a
blasting process, this parameter must be adjusted continuously. The
ventilation power must be controlled in relation to the relative negative
pressure and kept constant.
Humidity
The
humidity in the blasting medium influences the particle weight, and thus the
crash energy of the granulates on the surface. An uncontrolled heating of
blasting medium can't guarantee the reproducible values. Most blasting media
tend to build electrostatic effect at a too high temperature.
Pre-Accelerator
When a pre-acceleration of the medium is necessary in a
blasting process, this parameter must be also took into consideration for the
process control. A rudimentary, thus in most cases arbitrary preset
pre-acceleration pressure can't result in reproducible, guaranteed value from
the viewpoint of physical law. The pre-acceleration pressure must be kept
constantly as an integrated process parameter during the whole blasting
process as well as the process pressure (working pressure).
Our
experiences over many years and studies in the field of surface technology have
been put into the development of the XINTECH
DigiFinish blasting machines. The DigiFinish blasting machines guarantee
reproducible blasting process because all available parameters can be stored and
read back from the memory of the cabin with one touch of a button.
|
back to "MasterFinish Series" | main
menu |
|
Surface technology
© XINTECH Systems AG & XINTECH Hotrunner AG All rights reserved.