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Hardware knowledge: analysis of hardware impregnation process
Non-ferrous and ferrous metal castings are prone to defects such as porosity, shrinkage and porosity during the casting process. These tiny holes, if the arm thick defense line is connected, the casting will form a leak when it is under the action of air pressure or hydraulic pressure, resulting in the scrap of the product. The impregnation process is an effective method to solve the above-mentioned problems.
Hardware impregnation process related:
⑴Put the parts into the impregnation tank.
⑵Vacuum treatment: start the vacuum pump, the vacuum pressure is above -0.09MPa, and use the vacuum to extract the air (or water, oil, etc.) in the micropores or cracks of the parts, and the vacuum time is 15 minutes.
(3) Use vacuum to suck the glue into the impregnation tank. The quantity of glue should be based on the parts in the immersion basket. Remove the vacuum to normal pressure.
⑷If necessary, turn on the compressor and use compressed air to press the glue into the micro-holes or cracks in the parts. The compressed air pressure depends on the specific situation. If there is no special requirement, the compressed air pressure is 0.8-1.0MPa That's it, 15 minutes. After impregnation, open the vent valve to relieve the pressure.
Be sure to clean the impregnation liquid on the surface of the product in time. It will agglomerate on the surface after a long time. Infiltration is very effective for pores in aluminum die castings.
The hardware impregnation process is suitable for the impregnation of aluminum alloy, zinc alloy, copper alloy, iron castings, steel castings, etc. for steam, water and oil leakage. Typical impregnation castings such as engine block, cylinder head, intake manifold, oil pump, nozzle, water pump, valve cover, cast oil pan, carburetor housing, gearbox housing, cast iron plate, crankcase, compression Machines, ABS controllers, power steering gears, automobile wheels, fuel pumps, natural gas control valves, hydraulic valves, filters, oil cylinders, cylinders, hydraulic pumps, cooling pumps, airtight aircraft instruments and electronic instrument shields, air brake parts And various gas meters.