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Shell removal methods
Jun 14, 2018

The followings are some kinds of peeling methods, their working principe, characteristics, and applications.


  1.  Mechanical shell: 

     

    By using the mechanical vibration, the casting group can remove the shell under high speed  vibration impact.

     

    The production efficiency is high, but the labor bar is poor, the noise and dust are large.

     

    It is difficult to clean casting with holes, deep holes, deep grooves and complex inner cavities.

 

    It is widely used in China.



2. Electro-hydraulic sand cleaning


   The shell is removed by shock wave and impact pressure caused by high voltage discharge between the electrode in water and the casting. 


   High efficiency, no dust, good working conditions. 


   But the equipment costs a lot. 

 

   Complex, thin - walled precision casting pieces are easy to deform in sand cleaning. 

 

  It is mainly used for cleaning of ordinary sand cast steel parts. Less use in investment casting.



3. High pressure water sand cleaning


   The high pressure water of 20~ 136MPa was injected into the surface shell and core of the casting with the nozzle for sand cleaning. 


   High production efficiency, no dust, good working conditions.


   Foreign precision casting parts are widely used.




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