What if semi synthetic cutting fluid always has foam?
November 15, 2022
The general foam problem has been puzzling the stakeholders in all aspects of metal processing, and solving the foam problem is also a job that occupies a large part of the time of the technical R&D and technical service personnel. Semi Synthetic Cutting Fluid is usually prone to foam problems, and Fully Synthetic Cutting Fluid adopts oil-free formula system, almost without emulsifier, so air release and foam performance are good, and foam problems are relatively rare. At present, semi synthetic products are widely used in the market, with the largest number of design and processing fields. Foam problems are also common.
Generally, the defoaming of semi synthetic cutting fluid depends on the hardness of defoamer and water (calcium and magnesium ions in water). Traditional defoamers are time sensitive, so the hardness of water plays a decisive role in the performance of foam. For customers with hard water quality, the requirements for hard water resistance of cutting fluid are very high, but they seldom worry about foam; For customers using soft water, the requirements for hard water resistance of cutting fluid are low, and they may worry about foam.
Therefore, how to select products or design products according to customers' working conditions and water quality is a very important step. Therefore, selecting appropriate products according to process conditions can solve customers' foam problems. Foaming caused by processing site: 1. There is no rule or regulation for fluid infusion (after adding water, add concentrated solution) 2. The concentration of processing fluid is too high 3. The processing fluid is contaminated (residual cleaning agent of other processes, or cleaning agent of the cleaning machine, cutting fluid of other brands, etc.) 4. The tank design or volume problem (the return tank is designed too small, and the foam can't be eliminated by standing still) 5. The temperature of the processing fluid is too high (usually controlled at 20-30 ℃) In general, the cutting fluid blisters. The above points should be checked to find out the cause of blistering, so as to suit the case. If it is the reason that cannot be improved in a short time, such as the small volume of the liquid tank, you can choose defoamer to solve the foaming problem. At present, the use of defoamer is very convenient and effective.
