What are the factors that influence the selection of diamond grinding discs?

What are the factors that influence the selection of diamond grinding discs?

The selection and use of diamond polishing pads are regular:

1.      Use diamond polishing pads or concrete thick polishing discs for ground leveling and rough grinding;

2.      Fine sanding diamond polishing pads can be handled well without coarse sanding polishing discs;

3.     Increasing the counterweight of the grinder or increasing the rotational speed can improve efficiency;

4.  Try not to skip the number of grinding polishing discs;

5.   Dry grinding saves more consumables than water grinding, but water grinding treatment will make the ground more uniform and delicate;

6.  After cleaning and drying the floor, use high-speed dry polishing pads with thin abrasive discs for better polishing effect;

7.  Using sponge polishing pads can improve the brightness of the floor.

Today, We briefly summarizes and shares with you the factors that affect the selection of grinding discs.

1, The flatness of the ground

Manual smoothing of the screed ground or loose, badly damaged old ground, need to screed or cut loose surface layer, need to use a high-power grinder, choose concrete diamond grinding pieces such as strong grinding force, suitable for screed.

Cement self-leveling ground or polishing machine mechanical leveling ground flatness is better, only diamond resin polishing pads can make a beautiful polished ground, and it is also more saving.

2, the hardness of the ground

The concrete used in the design and construction of concrete ground is expressed by the label, that is, we usually talk about C20, C25, C30, etc., under normal circumstances, the higher the label, the better the strength and hardness of concrete, but due to the influence of various factors, the label of concrete and the hardness of the ground are often not corresponding.

The hardness of concrete floors is usually expressed as Mohs hardness. The hardness of the concrete floor is usually between 3-5, on the site, we can use some substitutes to replace the Mohs hardness tester to understand the hardness of the ground: the hardness of the indentation damage scratch with iron nails and keys is less than 5, otherwise the hardness is greater than 5.

3, the weight and speed of the grinder

Floor grinding machines are usually divided into small, medium and large. Generally speaking, the bigger the machine, the more power, the higher the efficiency.

In actual use, it is not the bigger the machine, the better, too large, too heavy grinding machine although the grinding efficiency is very high, but the use often leads to excessive grinding, increasing the construction cost.

Experienced workers will adjust the machine speed, moving speed, number of grinding pieces and machine counterweight according to the characteristics of the machine, reduce construction costs and improve construction efficiency.

4. Type and particle size of grinding discs

The most commonly used abrasives for floor treatment are PCD abrasive discs, metal-based abrasive discs and resin-based abrasive discs. PCD abrasive discs are used to remove thick coatings on the floor surface, while metal-based abrasive discs are used for floor surface pretreatment and rough grinding. , resin-based grinding discs are used for surface rough grinding, fine grinding, fine grinding and polishing.

Particle size refers to the size of the diamond particles contained in the abrasive tool. The lower the number, the larger the particles.

Metal grinding discs are usually divided into several sizes such as 30#, 60#, 100#, 120#, etc. Which size number to use depends on the ground conditions. For example, if the ground is not smooth or the surface is loose, 30# may be needed. Metal grinding discs are used to remove loose surface layers and level the ground. Grounds that need to be frosted or grindstone usually require 50# or 100# metal grinding discs;

Resin grinding discs are widely used. The particle size is 30#-3000#. Different particle sizes are distinguished by sticky cloths of different colors. They are used for rough grinding, fine grinding, fine grinding and polishing of the ground. Resin grinding discs include hard grinding discs and soft grinding discs. The difference between the discs is that hard abrasive discs have better leveling effect and are more suitable for medium and large floor grinding machines, while soft abrasive discs have better polishing effects and are suitable for various types of floor grinding.