Introduction of infiltration agent by infiltration equipment company

Impregnation, also known as impregnation, soaking, and infiltration. It is called impregnation in Taiwan and Japan. The English word is impregnation, poroussealing. It is a (slit) osmosis sealing process. The sealing medium (usually a low-viscosity liquid) is infiltrated into the micropores (slit) by natural permeation (ie, microporous self-priming), vacuuming, and pressurization, filling the gap, and then passing through the natural (room temperature), cooling Or heating or other methods to cure the sealing medium in the gap to achieve the role of sealing the gap.

There are many materials that can act as an infiltrant, such as water, wax, certain vegetable oils, salt solutions (water glass), metals, resins. Water glass, metals and resins are widely used in contemporary industrial production.

Water glass appears as an infiltrant earlier, and is often used for gap sealing of castings. It is characterized by low cost, contains a large amount of water, and is solidified by volatile water, so the shrinkage is large and the pass rate is low. In addition, the parts processed by it are not cleaned, the production efficiency is low, and the impregnation site is dirty. It is now being replaced more and more by resin.

Metal as an infiltrant mainly refers to a low melting point metal such as copper (copper alloy), tin, and the like. Used more in the powder metallurgy industry.

The early appearance of the resin as an infiltrant is some synthetic resin and is toxic. Later, non-toxic resins appeared, and castings and powder metallurgy parts were more and more widely used. It is characterized by low viscosity (lean), strong penetrating ability, high pass rate and high production efficiency. Parts processed by it are easy to clean, and the impregnation site is cleaned

Defects such as porosity and porosity generated during the casting process are the direct cause of leakage of the casting. Leakage detection is carried out especially after machining and assembly, and the loss of waste caused by leaking parts is especially large. The application of infiltration technology on the production line has become an industry consensus. At present, many companies have included infiltration as an indispensable process into the process documentation. At present, infiltration technology has been widely used in automobiles, motorcycles, trains, air conditioning refrigeration, aviation and other industries. It can effectively fill black metal castings (cast iron, cast steel, etc.); non-ferrous metal castings (aluminum alloy, magnesium alloy, copper alloy, zinc alloy, etc.); powder metallurgy parts, ceramic parts and other defects. Metal castings (aluminum alloy, magnesium alloy, copper alloy, zinc alloy, etc.); defects in powder metallurgy parts, ceramic parts, etc.