MASTER plastering machine
4
1 Description
1.1
General description of the equipment
The MASTER is an improved version of its former one, improvements which have been
carried out according to the most modern knowledge and in accordance with the latest safety
regulations. It has been designed to work smoothly with premixed dry materials of mechanical
application.
Of a simple and robust construction, its components layout allows an easy use and service, and
its legendary trustworthiness is essential features of our MASTER.
The serial mixing and transport flow of approx. 30 l/min. can be adapted between 5 and 60
l/min., depending on the need of wet material, in only a few minutes by changing the pump elements
(see page).
The Master has got a gate on the material deposit with a soft operation lock, between the dry
material container and the mixing chamber. Thanks to this gate, it is possible to open the mixing tube
without dry material coming out of the container when it is closed.
Loading MASTER can be done manually, using bags, or through a pneumatic transport system
with material coming from a silo. The blowing hood for the pneumatic load is hermetically fixed to the
machine by eccentric locks, which are adapted to the receiver hopper.
With the gate open, the dry material is transported without loss through a feed auger from the
dry material container up to the mixing chamber, where it is mixed until we get a homogeneous
material mixture. The amount of water needed to this aim can be exactly regulated using the water
dose taps, in a way that we always have the same consistency.
The feed auger pump, installed under the mixing chamber, transports the wet material through
the hose up to the spraying gun, which sprays the material over the wall to be sprayed using
compressed air. The compressed air needed is produced by a membrane compressor, located on the
MASTER frame, and it is directed to the spraying gun through a hose which has been spread out
parallel to the product hose.
The MASTER remote control is activated by closing the main air key on the spraying gun. The
compressed air resistance acts over the air pressure switch, disconnecting the head and the feeding
engine.
In case of breakdown in the water dose or of sudden net pressure drop, an additional water
pressure switch gets activated, stopping the machine immediately. For special work conditions, for
instance the use of special porous, liquid or self-levelling mortars, an electric remote control system
can be supplied.
The MASTER electric control device is equipped with a re-connection blocker, that is to say
that, if the machine stops because of lack of current or water supply, it is necessary to start the machine
again by pressing the green button.
All electric connections are installed within a hermetic distribution box to protect them against
dust and water splashing, as under the Low Tension regulations of the EEC 73/23 Directive (19.02.73),
as well as its amendments. This box is placed on such a height that it makes its operation easier.
