In the description of the moulding of the last example, a reference was made to loose pieces on the pattern that do not draw out of the sand with the main body. Loose pieced are used where it is desired to avoid the placing of a core or where core prints are to be made. Thus in Fig. 78, if the pattern were imbedded in the sand of the drag with a parting line at A B, it could not be withdrawn unless the pieces a a remained in the sand. These pieces are therefore made loose and then drawn out on the angle at which they are set after the main pattern has been removed from the sand.

Fig. 78.