To ensure perfect blast cleaning results on all work pieces large continuous flow shot blast machines normally work with a surplus of blast media. This results in higher energy consumption.
To eliminate this waste of energy, Walther Trowal developed the “Smart Abrasives” option for its THM 700 and 900 shot blast machines, which are equipped with up to four turbines. It adjusts the media flow rate in the entire media recycling system to the blast cleaning requirements as well as the shape and size of the work pieces. If a particular blast cleaning process requires a lower blast performance, the system reduces the media flow through the turbines and the RPM of the augers.
This innovative control system saves not only energy. Since less media is passing through the shot blast machine, it also reduces the media consumption. In addition, the overall uptime of the shot blast machine is increased, and the amount of required work for maintenance is decreased.
With suitable processing trials the optimal shot blasting parameters, such as turbine RPM, media flow rate, etc., are defined for each individual work piece type. Based on these data processing programs are created, which are then stored in the PLC of the machine controls.
Typical applications for the THM machines are automotive components, for example, chassis parts made from aluminum like transverse links, swivel bearings or steering knuckles. For the surface refinement of these light-weight work pieces the manufacturers are increasingly using aluminum blast media. It allows to make the entire blast cleaning process particularly gentle.
2 Continuous flow shot blast machines with adjustable power input minimize the consumption of energy.
3 The Smart Abrasive System significantly lowers the energy consumption.
4 The Trowal test and training center is equipped with several THM shot blast machines.
5 THM 500 troughed belt continuous flow shot blast machine in the Trowal test and training center in Haan/Germany.
6 Typical applications for the THM shot blast machines are chassis components like transverse links or swivel bearings.
7 A THM 400 shot blast machine in the TTC test and training center in Grand Rapids/USA.
