Pedrini GALAXY B220GB Polishing Machine For Granite Slabs

The perfect polishing of granite slabs on industrial scale requires a modern line equipped with state-of-the-art technologies. Pedrini is able to provide the most complete solutions ensuring high production performances, high degree of the polishing quality with low costs of operation and maintenance. Pedrini polishing lines for granite slabs are designed, manufactured and installed to meet every requirement of each customer. Each polishing line is set according to the available spaces and is customized thanks to the use of a wide range of options, machines and auxiliary equipment designed to meet any kind of production need and automation level Galaxy B220GB basement is composed of a heavy normalized steel work single base designed to withstand stress during the processing operation. The basement structure includes several footholds according to the machine length, each of which is equipped with the machine levelling device for the installation. All surfaces matching the upper structures have been machined through one sole positioning on the tool machine to achieve perfect units coupling. Galaxy B220GB is equipped with a belt washing system placed in the lower part. Special drain channels, formed in the lateral parts of the base structure, ensure a perfect drain and discharge of dirty water and possible debris. A multi-clothe conveyor belt with anti-slip profile drives the slabs during the complete operation stage. The belt movement is performed by two large diameter rolls: a traction roll powered through an epicyclical gear motor, an idle roll equipped with belt tension devices. The spindle-holding beam has been built as a solid piece of heavy normalized steel work characterized by a very sturdy structure. The pneumatic plants enabling the spindles up and down movement are located on the beam rear side in an easy inspectable position. All components have undergone structural inspection through the FEM (Finite Element Method). The structural components surfaces are protected with three coats applied after sandblasting, while the small parts have undergone a cataphoresis corrosion proofing treatment. The spindle-holding beam transversal movement is controlled by two gear motors synchronized through a connecting shaft, which drive two helical tooth pinions tempered and ground with two racks fixed on the bridges. The two gear motors are equipped with pneumatic locking system to stop the beam in case of power failure. Two special devices constantly lubricate with oil the contact between pinions and racks. In the models with 18, 20 and 22 heads, the spindle-holding beam is supported by three bridges: this system assures to work onto a perfect plane, ensures the total beam load to be spread on all sliders and reduces consumptions and frictions.