The precision cast
ing foundry manual, tight sand and steep die is: with the hand.
It has flexible operation, strong adaptability, low cost, short production preparation time, etc.
For workers but handmade molding technology level the demand is higher, and low productivity, labor intensity is big, the casting dimension accuracy and surface quality is poor, it is mainly used for single piece and small batch production.
Very large castings can only use manual model.
Foundry applications: 1, the whole molding: adopt the method of overall appearance modelling is called whole molding, its characteristic is all mold cavity in a sand box, modelling is simple, I won't produce the wrong box is suitable for the largest cross section at one end, and the plane of the castings.
2, die shape: shape in the truncation maximum punishment for two and a half, respectively, up and down in the sand mold modelling method called parting modelling.
Parting modelling is easy to operate, save to save time, apply to the largest cross section in the middle of the casting.
See here, I believe you an introduction to the process of foundry have a certain understanding.
Casting factory, seek xin er.
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