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Grinding And Polishing Of Stone Slabs
2022-05-18

The grinding and polishing of the flat slabs must be done in a certain order and according to certain principles to ensure the quality of the grinding and polishing of the surface, otherwise it will only be useless.

The Main Points Of Grinding And Polishing With Multi-head Continuous Grinding Machines:

Pay attention to the arrangement of abrasives and the order of grinding, the arrangement of abrasives should be in the order of numbers from coarse to fine and from small to large; grinding heads of different numbers are not allowed on the same grinding disc; Grinding and fine grinding must be in order; Use abrasives from the same manufacturer to polish the same batch of slabs.

Choice Of Abrasives:

The grinding blocks for grinding and polishing stone are divided into marble and granite. Do not confuse when using. According to the physical and chemical properties of different stones, the types of grinding blocks to be used are determined according to the specific situation. Abrasives suitable for grinding and polishing of this kind of stone may not be suitable for grinding and polishing of another kind of stone.

The common types of marble abrasives are 16#, 24#, 36#, 46#, 60#, 120#, 180#, 240#, 320#, 400#, 800#, 1200#.

Grinding Head Pressure Adjustment:

The grinding head pressure directly affects the consumption of the grinding block. If the pressure is large, the grinding block will consume more. On the contrary, the grinding block will consume less. Therefore, in the process of grinding and polishing, the pressure of the grinding head is often adjusted according to the actual situation at any time. The adjustment of grinding head pressure is of great significance to reduce the consumption of grinding blocks, increase production output, and improve the quality of grinding and polishing slabs.

Water Control:

Good water quality and sufficient water quantity are an important guarantee for the polishing quality of the slabs. Especially white and black stones have higher requirements on water quality when grinding and polishing;

The requirement for water quantity is that the front grinding head should be sufficient, the rear grinding head should be clean, and the control of water quantity is mainly concentrated on the last polishing block. The quality of its control directly affects the gloss and mirror effect of the polishing slabs. Wetting is appropriate. If the amount of water is not well controlled during the grinding and polishing process, the burnt slabs may occur when the amount of water is small during polishing;

The water used for grinding and polishing should be water free of chemical substances as much as possible, otherwise the luminosity of the slabs will be reduced. The pH of the water is best to neutral water. The water used for grinding and polishing should preferably not contain suspended substances, because the particles in it will scratch the polished stone, and special attention should be paid to the grinding and polishing of soft stone and dark stone. The water used for grinding and polishing requires the content of impurities to be less than 0.5kg/l and the particle size of impurities to be less than 0.01mm;

Grinding Speed Adjustment:

The principle of adjusting the grinding speed is mainly based on the hardness of the stone, the width of the stone slab, and the condition of the stone slab.

Conveyor belt speed adjustment:

The speed of the conveyor belt is determined by the hardness of the stone and the condition of the board surface. The speed of the conveyor belt of the slabs that is easy to polish can be high, and the slabs that is difficult to polish is just the opposite;

Process parameters of multi-head automatic continuous grinding:

Grinding speed: 050m/min.

Conveyor belt speed: 0.31.99m/min.

Grinding pressure: 04kg/c.

The Grinding And Polishing Steps Of The Multi-head Automatic Continuous Grinding Machine:

Adjust the pressure parameters of each grinding head, at the same time turn on the switch of each grinding head, and set the switch of cleaning brush to the automatic state;

Turn on the control power, press the start ready button, and set the manual/automatic transfer switch to the automatic state;

When starting the conveyor belt, check whether the speed of the conveyor belt is normal;

Start the 1#16# grinding head motor and the cleaning brush motor in turn. After all the running is stable, start the grinding bridge and the conveyor belt. When entering the production state, adjust the speed of the conveyor belt (usually the speed of the conveyor belt is 0.8m/min);

Upper plate: hoist the plate on the ground to the table of the turning machine;

Slab feeding: the slab on the slab turning machine is driven by the conveyor belt into the grinding and polishing area of the continuous mill;

In the production process, the speed of the grinding bridge should be adjusted according to the condition of the slab.

When the first slab is ground out, various indicators should be checked according to the slab inspection standard. If it does not meet the requirements of product quality, the reasons should be analyzed and the relevant grinding and polishing parameters of the continuous mill should be adjusted.

The Main Points When Grinding and Polishing With A Hand Grinder:

Check whether the power supply and water supply system are in normal state;

Check whether the grinding head moves back and forth, left and right, flexibly and accurately;

Check whether all parts of other mechanical systems are normal;

Place the polished slabs on the workbench, select the corresponding grinding head and install it on the rotating shaft of the hand-held grinding;

Turn on the water supply switch first, and then start the grinding head;

When grinding, the force should be uniform, and the grinding and polishing should be carried out in the order of rough grinding, fine grinding and polishing;

When grinding and polishing, the abrasive should be correctly selected according to the situation of the stone;

When grinding, you should concentrate on the grinding and polishing of the surface of the slabs at any time, find out the problem in time, and take corresponding measures to solve the problem.

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