Interpretation of metal infiltration process

Core Tip: Colored and ferrous metal castings are prone to defects such as porosity, shrinkage and porosity during the casting process. These tiny holes, if the arm thickness line is connected, the casting will leak when subjected to air pressure or hydraulic pressure, causing the product to be scrapped.

Colored and ferrous castings are prone to defects such as porosity, shrinkage and porosity during the casting process. These tiny holes, if the arm thickness line is connected, the casting will leak when subjected to air pressure or hydraulic pressure, causing the product to be scrapped. The infiltration process is an effective method to solve the above problems.

Applicable to: impregnation of leakage, water leakage and oil leakage of aluminum alloy, zinc alloy, copper alloy, cast iron and steel castings. Typical impregnated castings such as engine blocks, cylinder heads, intake manifolds, oil pumps, nozzles, pumps, bonnets, cast sump, carburetor housing, gearbox housing, cast iron slab, crankcase, compression Machine, ABS controller, power steering, automobile hub, fuel pump, natural gas control valve, hydraulic valve, filter, cylinder, cylinder, hydraulic pump, cooling pump, closed aircraft instrument and electronic instrument cover, air brake parts And various gas meters and so on.

Impregnation related:

(1) Place the parts in the infiltration tank.

(2) Vacuum treatment: The vacuum pump is started, the vacuum pressure is above -0.09 MPa, and the air (or water, oil, etc.) in the micropores or cracks of the parts is extracted by vacuum, and the vacuum time is 15 minutes.

(3) Vacuum the glue into the impregnation tank. The amount of glue should be based on the parts in the immersion basket. Remove the vacuum to normal pressure.

(4) If necessary, turn on the compressor and use compressed air to hydraulically press the glue into the micropores or cracks in the part. The compressed air pressure depends on the specific conditions. If there is no special requirement, the compressed air pressure can be 0.8-1.0MPa. Time is 15 minutes. After the impregnation, open the vent valve to relieve pressure.

Always clean the impregnation solution on the surface of the product. After a long time, it will agglomerate on the surface. Infiltration is very effective for the pores in aluminum die castings. We bought a set of equipment in Ningbo, which basically avoids the air leakage in our aluminum die-casting products. Because our products are used in high pressure applications. You can't leak at all. If the quality of the product is high, it is still necessary. It is generally not used in high-pressure situations, and it is not necessary. As long as you use your brain on the die-casting machine, you can do a good job.

Concerned about surprises

Label: Interpretation of hardware infiltration process

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