|Title||Cold pressing process in the production process of cutting sheets|
Most of the grinding wheel production is ceramic grinding wheel. The ceramic bond grinding wheel has the advantages of natural porosity and chemical stability, so it is suitable for dry grinding and wet grinding, especially under the conditions of water-based and oil-based grinding fluid. However, ceramic grinding wheels are less elastic and require a high sintering temperature. In contrast, the phenolic resin bond grinding wheel has the advantages of good elasticity and low sensitivity to shock, impact, and side pressure. Its high stability makes it suitable for higher speeds and Produce high performance cutting disc. Its good elasticity makes it suitable for ultra-precise grinding and surface polishing, making it particularly suitable for grinding wheels.Also one of the hot sale cutting wheel
The production process of the phenolic resin bond grinding wheel is mainly a cold pressing process, and the bonding agent used in the cold pressing process is a wetting agent and a powdery resin, and a liquid phenolic resin, furfural, decyl alcohol, cresol, etc., which are generally used as a wetting agent, Mostly used are liquid phenolic resins. The factors determining the ratio of liquid resin to powdered resin (usually called liquid to powder ratio) are: abrasive particle size distribution, filler type, filler amount, viscosity of liquid resin, and properties of powdered resin. If the viscosity of the liquid resin is large, more liquid resin is required to completely cover the surface of the abrasive; the smaller the particle size of the abrasive and the filler, the larger the specific surface area and the more the liquid is used; the higher the molecular weight of the powdered resin The lower the free phenol, the worse the adhesion to the liquid resin and the greater the amount of liquid required. In all of the above cases, it is necessary to increase the liquid to powder ratio. Generally, a liquid resin is used as a wetting agent, and the ratio of liquid to powder is 1:2 - 1:4, and a mixture of furfural or decyl alcohol and eucalyptus oil is used as a wetting agent, and the ratio of liquid to liquid is 1:6 - 1:8. It is better to achieve the desired mixing effect without damaging the abrasive. The mixing time after adding the fine powder is generally 2-4 minutes. If the mixing is too short, the mixing is not uniform, the resin film is too long to fall off, and the temperature of the material is increased.
Please register or log in.