Polishing Granite Using Air Polishers

Though the title says polishing granite using air polishers, the method is applicable to all stones. Air polishers are those machines which run on a stream of air, which is used to rotate the polishing head. In a conventional electrical polishing machine, the motor spins the head at a specified/variable RPM. Air polishers offer many advantages over conventional machines.. They are lightweight as they do not have a motor and related circuitory, and boards inside the body. This is a very notable advantage, as during the polishing of any stone, the operator might have to use the machine over a long period of time. An air polisher reduces operator fatigue due to its weight advantage. Some operators also prefer the fact that an air polisher produces lesser vibrations than a conventional polishing machine. These vibrations are crucial as they might affect the quality of polish. No matter how steady one operates the machine, the vibrations produced by a conventional polishing machine might create fine surface undulations. This can be avoided by air polishers. On the flipside, to operate an air polisher, one needs an air compressor. If you are in a factory and have space for a compressor, this wouldn’t be much of a problem. However, if you are a contractor who has to use the polishing machine on site, then you will have to carry the air compressor with you. Portable compressors sometimes do not provide a constant pressure which is required by the machine. For Optimum performance it is recommended to use the machine at a minimum of 95PSI. Here is a video of an air polisher...

Onslaught of The Automatic Stone Polishing Machine

The recent trend in the Indian stone industry is marked by the arrival of automatic stone polishing machine for granite, slate, limestone etc. These machines are available in different configurations starting from 6-head, 9-head, 12-head, and upto 16 or 24 heads. The multi-head automatic stone polishing machine, offers high rate of production per hour, and reduce the turn around time for turning rough slabs into polished finished material. The basic principle of the machine is the same. The rotating polishing heads are attached to a bridge, which controls the oscillating movement. Each head is equipped with a motor, and a revolving head, on which the abrasives are mounted. Sensors sense the edges and contours of the slab. The stone is passed below these heads on a conveyor belt. The heads then are act on the stone, and rise above once the edge passes below them. The pressure with which the heads act are also controlled individually. The series of abrasives are mounted onto the head with the nearest head to the input trolley having the roughest grit, and the head nearest to the exit trolley having the finest grit, or buffing wheel. Generally an 8inch disc is ideal to be mounted onto the polishing head. The following video shows you the process of one such machine. Disclaimer: Mark Corporation is not involved with any machinery manufacturer. Our abrasives work with all types of automatic stone polishing machines from any manufacturer. The above video is for information alone. A combination of metal, and resin bonded abrasives are acted on the surface of the stone, and the raw slab passes on...

Polishing Granite Countertops with Flexible Diamond Pads

A granite kitchen counter top is durable and will stand the test of time. Granite countertops also add to the elegance of the kitchen. The heat resistance and stain resistance properties of granite, make it an excellent choice for a kitchen.  Here we have share a few tips and videos which show you the process of polishing granite countertops with flexible diamond polishing pads. For polishing of any stone, the process is more or less the same, here are the steps: The Process The best polish is achieved by using a wet polishing mechanism. Water is used as a lubricant which keeps the surface of the stone cool, and also aids in the disposal of used diamond particles. Our detailed account of how abrasives work will throw much light on the same. Rougher grits are used for the grinding of the uneven stone surface. This removes any surface undulations and gives a uniform level surface The ultimate quality of polish depends entirely on the initial steps. A well ground and level surface is critical to achieve good gloss The stone is then polished using a series of grits, sequentially Each grit removes the marks made on the surface by the previous grit As the sequence nears the finest grit, the stone surface is ready for mirror polishing Final buffing brings out the gloss in the stone For bull-nose, or round edges, work the abrasive away from the primary working surface It is important that you maintain the patterns of movement throughout the process of polishing Dos and Don’ts Do use a good quality polishing machine Do have a constant...
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