Something You Don't Know About Metal Cutting Fluid Defoamer 

Our machines are constantly rubbing and cutting during processing. They need to use cutting fluid for cooling, lubrication, rust prevention, degreasing cleaning and corrosion protection. Let our production be faster and more convenient. However, it will generate a lot of foam when it is used. These foams will seriously affect the progress of our project, and the metal cutting fluid defoamer will be on the scene.

First of all, we need to know what are the main metal cutting fluid defoamers?

 1. Emulsified oil cutting fluid defoamer

The emulsified oil cutting fluid defoaming agent defoams rapidly, which can enhance the brightness of the workpiece and increase the tool life. It has good diffusibility and permeability, and can be dissolved in oil and cutting liquid.

 2. Semi-synthetic cutting fluid defoamer

This product has high temperature resistance, acid and alkali resistance, no floating, no bleaching oil; it can be widely used in a wide range of temperature systems for foam elimination and containment in a variety of harsh systems.

 3. fully synthetic cutting fluid defoamer

The fully synthetic cutting fluid defoamer is compounded by a special modified polyether and fluorine-containing raw material through a special process, and is easily soluble in water, which is very suitable for the presence of high temperature, strong acid and alkali, high shear force and high pressure. Underneath, always keep defoaming and foam suppression.

Metal cutting fluid defoaming principle

The bubbles in the cutting fluid should be redistributed through the bubbles, and the thickness of the adsorbed film can be thinned to naturally defoam. The redistribution of bubbles is mainly caused by the difference in additional pressure. When bubbles of different sizes are produced in the cutting fluid, the small bubble "rate radius is a large bubble for It, additional pressure 2, r> 2 (r, when two When the bubbles are in contact, the gas passes through the boundary and diffuses from the small bubbles to the large bubbles, so that the small bubbles become smaller, and the large bubbles become larger and rupture. The thickness of the thinned adsorption film is discharged and evaporated, and when bubbles are formed in the cutting fluid, In the case of liquid, it is a concave liquid, and the additional pressure is directed to the center of curvature. This force causes the liquid to move to cause the film wall to become thin and the bubble to rupture. The natural defoaming time is too long to meet the requirements, but according to the above principle, we can purposefully Add the corresponding substance to make it defoam quickly. When the foam is produced, a substance with a lower surface tension can be added to rapidly penetrate into the liquid film between the foams, and the liquid with low tension automatically flows to the surface tension due to the surface. The high liquid causes the bubble stress to be unbalanced and achieves the purpose of defoaming.