In This process , the pattern is divided into half across the parting and mounted in halves on to plates with parallel sides of the same shape as the parting. The use of the plates gives the following advantages :
1. The patterns can be handled easily and rapidly.
2. The task of making the joint between the two parts of the mold is relieved as the plate provides its own joint when the flask is rammed up.
3. The pattern can be drawn quickly, as the plate overlaps the side of the box and the pins which hold it in the position acts as guides during the drawing operation.
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