Precision casting cleaning scope and method

The whole process of removing the precision casting from the mold, removing unnecessary parts other than itself, and polishing the inner and outer surfaces of the cast-rolling casting.
De-coring and surface removal:
Divided into two categories, dry and wet. Dry cleaning is the use of industrial equipment to remove castings. Commonly used machinery and equipment are simple, high in productivity, have great adaptability to different types of castings, and have the advantages of being able to remove the core and clean the surface reasonably. The defect is that the smoke and dust, the noise is very loud, and the environment is polluted during the operation of machinery and equipment. Wet cleaning has no smoke and dust, but because tap water is used as the substance, the surface of the casting is very easy to rust. In the whole process of work, a lot of waste water and sand with cement were caused, which caused problems such as sand and water recycling and industrial waste water treatment.
Common dry and wet cleaning in manufacturing are:
①Remove by drum. Put the castings and the star iron into the annular drum together. When the drum rotates, the sand inside and outside the casting is removed by the collision and friction between the casting, the star iron and the waste sand, and the surface of the casting is polished. In addition, part of the burrs can also be removed. Raw edges. This kind of machinery and equipment can be used to remove large, medium and small castings with simpler appearance and thicker walls.
② Shot blasting removal. The impact energy of steel balls, iron shots, and abrasive flow of high-speed fitness exercises is used to remove cores, sticky sand, and polish the surface of castings. In addition, common shot blasting machines and equipment also include shot blasting table and shot blasting room. The shot blasting cleaning machinery used for continuous manufacturing includes chain-plate shot blasting drum, rotary shot blasting cleaning table, suspension type continuous production shot blasting cleaning room, etc. The operation and maintenance cost of this kind of equipment is relatively high.
③Sand cleaning by hydroelectric power generation. The high pressure water is irradiated according to the pipeline from the spray nozzle to the casting to be solved, and the core and the casting sticky sand are removed with the help of the mechanical energy and erosion effect of the flowing water. Hydroelectric power generation sand cleaning generally always has an open cleaning room composed of channel steel and thick steel plate. The bottom end is set with a rotating workbench. The spray gun is installed on the outer wall. It can be moved and rotated left and right, so that the high pressure water can irradiate the bottom of the casting. Everything beyond the edge. Sometimes in order to improve the high efficiency of removing sticky sand on the surface of precision castings, wear-resistant materials such as quartz sand are introduced into the appropriate part of the spray gun to obtain a high-speed water sand flow. This type of method is generally called water sand cleaning.
④ Water explosion to clear the sand. After the casting mold is poured, when the casting is cooled to the required temperature, it is boxed and immediately infiltrated into the reservoir. The water penetrates into the mold through all the gaps and quickly vaporizes when it touches the high-temperature metal material and explodes. The shock wave can cause the inside and outside of the casting. The adhering sand foundation is removed. The water explosion sand cleaning method has the advantages of fast working speed and high efficiency, and has been widely used in steel casting production workshops in China. Generally used to solve simple stainless steel castings with a carbon content of 0.35% or less.