This booth has been developed in compliance with the need of the most demanding powder coating markets in terms of industrial performances, healthy working environment, ergonomic use, cost effectiveness and quality of the final product.
The entire powder coating application system has been re-design with the aim to get a colour change time in less than 5 minutes.
The booth foresees the recovery circuit for the over-spray and is provided with electrostatic powder coating deposition equipment.
The booth is suitable also for refitting of existing vertical powder coating plants replacing the old equipment.
a) the cleaning process of the booth foresees a series of operations scheduled, according to a logic sequence automatically managed
b) the whole cleaning process of the booth (including the guns) does not require any intervention of the operator
c) Thus the booth cleaning time takes less than 5 minutes.
Solutions studied to reach that result:
1) Four sliding belts (vertical walls and booth bottom floor) automatically cleaned in continuous.
2) As far as regards the powder hoses, inner part and external surface of the guns a cleaning process automatically managed through an optimized sequence of operations has been studied.
a) With reference to previous generation of booth models, thanks to an accurate study of the air extraction system and of the profiles path in the booth the powder deposition efficiency has been improved that is an increase of the share of powder that applies directly on the profiles. With the same number of guns it is possible to increase the conveyor speed even with profiles difficult to be painted.
b) Quality of the coating improvement both in terms of uniformity of the layer thickness and in terms of powder penetration: thanks to the cloud of powder which surrounds the profiles all around in the booth before being extracted through the vertical slots.
a) The high efficiency of the deposition allows also a relevant reduction of the powder consumption in case of very small lots that are painted in powder-waste modality and in general, with all lots, during the waste-powder phase that occurs at the beginning of a new lot after a colour change (before switching to the powder-recovery modality). Thanks to the four sliding belts automatically cleaned, the powder, during the powder-recovery modality, is recovered in continuous so comparing with the situation of the previous generation booth model (where the powder lays on the walls until the colour change operations are carried out and finally is wasted), the fast cleaning booth will allow to have an additional share of saved powder.
a) The booth is equipped with a "dynamic" air extraction system that allows to adjust the extracted air flow-rate along the height of the reciprocator stroke trucking the position of the guns; in this way the powder does not escape the spraying zone.
Thanks to the automatic cleaning of booth walls, guns powder hoses, the operator of the booth remains outside to control the process, to clean the powder centre and to feed the booth with required powder.
The area of the booth can be surrounded by protective fences and the personnel will not be forced to have contact with the booth and the guns anymore.
b) The whole system has been studied in compliance with ATEX directive.