The moulding box play a vital role in the foundry industry, a molding box divided into two halves (known as casting flask, the top and bottom halves of which are known respectively as the cope and drag) is prepared to receive the pattern. Which itself is divided along this parting line. Molding boxes are made in segments that may be latched to each other and to end closures. Ribs are provided on molding box. These ribs are specially provided for larger boxes for avoiding the mould breaking by sand load. Both the Top and the Bottom of the mould boxes are machined completely to get the parallel by this positive closing can be achieved.