A vertical polishing machine, for straight edge.
The machine fits two conveyors made in cast iron and protected by a special paint coat to avoid oxidation. The beams of conveyor belts pulleys are made of stainless steel, with shielded ball bearings, isolated from water leaking by means of special devices. Conveyors belts are polyurethane-made and belt shifters are realized in high density polyethylene.
Caterpillar tracks which hold and move the pieces are made of linking elements. Stainless steel pivots, where tight bearings are fitted, assure articulation. Tracks motion is performed by gears without driving chains, in order to assure a long life and facilitate the feeding of pieces. Back track rubber pads are rectified, and pad thickness allows several flattening operations during its life. Front track pads are coated with a special grooved rubber able to grip firmly small-sized pieces and to compensate slightly uneven surfaces. Back track pads are made of vulcanized rubber fitted on the pad itself. Caterpillar elements and pads have been especially shaped to insulate at best the sliding guides. The track sliding guides fitted on beams are made of hardened and rectified steel, thus allowing a considerable precision and durability of the sliding surface. They are mechanically fitted and therefore can be replaced.
The machine fits an automatic centralized lubricating device, checking oil level and lubricating operation. Arrises supporting frame is made in cast iron. All wheels are installed on motorspindles. Their casing is entirely made of cast iron in order to enhance stifness and stability; they are provided with high precision ball bearings and with a special system for watertightness, which warrants a long life. Motorspindles’ cooling is provided by a large-sized fan fitted on the shaft. The slides of polishing wheels are endowed with a pneumatic equipment, to exert a constant pressure on the plate (also adjustable). Controls for back arris wearing compensation adjustment are situated on the front side of the machine, in order to simplify setting operations. Front arris slide is part of the front beam, thus keeping unvaried arris width despite thickness variation.