B065MV

CONTINUOUS BELT POLISHING MACHINE FOR MARBLE, TRAVERTINE AND STONES.

This highly efficient machine has been designed for thickness gauging and polishing of strips with trimmed ends and max width dimensions 650 mm.

The selection of the operational elements which form Supernova B065MV, their top level efficiency and reliability are the result of an experience which has matured throughout the technological evolution of more than 1,000 polishing machines manufactured in the past 25 years by Pedrini.
The new Supernova B065MV, reinforced with exclusive technology, achieves top production speeds, whilst reducing consumption, maintenance and depreciation.

All components have undergone structural inspection through the FEM (Finite Element Method).
The structural component surfaces are protected with three coats applied after sandblasting, while the small parts undergo a cataphoresis corrosionproofing treatment.

The polishing plates are driven through patented ROTOR spindles, that have been built as mono block systems with controlled vertical sliding.
ROTOR spindles direct drive system avoids radial stress on the spindle bearings, increases their life significantly whilst saving about 15% of the absorbed energy and does not need maintenance.
The mono block system has the centre of gravity on the spindle rotation axis and its considerable weight, that is controlled by counter-pressure, stabilizes polishing plate action. quality with the lowest tool consumption.
The ROTOR spindles are equipped with an easy- to-use individual device for the precision centring to the processing plane.
The polishing plates, that are utilized within optimal operative conditions, realize the best polishing

Exclusive technology to facilitate polishing process as well as on particularly fragile and delicate materials:
The polishing plates, obteined from one solid piece, are connected to the ROTOR spindles by special large size omnidirectional joints made in high technology composite structure.
These joints optimize abrasives performance and achieve top quality and top productive results even when low working pressure is required to process fragile materials.

The heavy normalized steel work base is designed to withstand all working stresses. All the surfaces have been machined by one sole positioning on the tool machine. The structure comprises the feet that are equipped with machine levelling devices.
The multi-cloth conveyor belt is driven through an epicyclical gear motor powered roll and is controlled through an idle roll equipped with the tensioning device.

The conveyor belt sliding plane is lined with easily replaceable steel plates.

The cast iron gauging unit bridge shaped carrier structures house the devices for vertical adjustment and for the automatic clamping. Available as optional:

1. motorized vertical adjustment with displacement visualized on display;
2. unit rapid lift at conveyor belt stop an return to work position at restart.

The cast iron bridges house the oil bath tracks for the large diameter, hardened and ground rolls supporting the mobile beam.
The rolls run over easily replaceable hardened steel blades.
The housings are protected by fixed labyrinth shields and are equipped with the oil level control and the oil drain systems.
The bridge structures support the racks and the contrasting system for the mobile beam movement control.

The mobile beam is built as a solid piece of heavy normalized steel work characterized by a very sturdy structure.
The beam rear side hosts the synchronizing shaft providing uniform movement at both beam ends.

Beam movement is guided through two pinions acting on two racks fixed onto the bridges and driven through two inverter controlled speed gear motors.

A double action unit is assembled onto each beam end.
The horizontal action favours the conveyor belt traction stress and makes the beam transversal stroke very smooth.
The vertical action withstands polishing plates working stresses and renders the beam very stable.
Exclusive technology for quick format changes to allow for productive flexibility:
The processing width adjustment is performed very rapidly by means of a centralized drive mechanism that operates both guides in a symmetrical and simultaneous way for the entire machine length.
Beam transversal stroke is adjusted, even when machine is moving, through an handle located in a comfortable frontal position.

Abrasives lubrication is performed through stainless steel piping that operate in stationary position inside the spindle assemblies.
The large diameter piping can be easily removed for the periodical clearing from calcareous substances to allow for the elimination of long an costly production stops, that are so frequent with traditional direct water feed systems.
Each spindle is equipped with abrasive wear level scale indicator ad with a feeler that, when abrasives are totally worn out, actuates plates automatic lifting as well as the alarm light.

The individual control panels are equipped with motor control buttons, a switch to actuate the manual up and down plates movement, a knob and manometer for working pressure adjustments.
The general control panel is located in a handy position on one of the bridges. The large dimension remote electric panel is air- conditioned by means of a heat exchanger, is dust proof and water proof in compliance with IP 54 (EN 60529) standards. The electric cables connecting the machine to the main electric panel are grouped together in a safe and dry position to an over-head metal channel strongly fixed to the base.

In case of processing extremely fragile or very hard materials, special gauging polishing machines are available. Such machines perform the thickness gauging operation by using heads equipped with diamond rolls instead of the traditional diamond plates. The heads allow for rolls inclination; through a simple and extremely fast adjustment operation by means of push button, each head will cover the entire range of machine width capacity without diamond tool changing.
Thickness adjustment is also operated through push button and the vertical displacement is visualized onto the display. Each head is equipped with a device for automatic lifting at conveyor belt stop and return to the working position at conveyor belt restart.
Also available gauging polishing units having separate gauging/prepolishing section (equipped with gauging plates or rolls) to allow for an intermediate plastering operation, or to create a higher potential line.