Definition of Pattern Part-3

7. Sweep Pattern:

 Sweep Pattern

In sweep pattern we use of wooden board. The wooden board of proper size is to be rotated about one edge to shape the cavity as circular symmetry. Sweep pattern is usually used once we need to create casting in very short interval of your time. Molds of in depth symmetrical casting are often made easily with the assistance of sweep pattern. There are three parts in sweep pattern spindle, base and sweep which is wooden board. The spindle is directed in vertical direction and the base is attached with sand.

8. Loose Piece Pattern:

 Loose Piece Pattern

It is very difficult to get rid of one piece of solid pattern which is above or below the parting plane having projections from the mold. With the assistance of loose piece sorts of patterns projections are often made by loose pieces. It requires skilled labor work also because it is extremely expensive. There is one disadvantage of this loose piece pattern is that their shifting are often done thanks to ramming process.


9. Cope and Drag Pattern:

Cope and drag pattern is a split pattern. This pattern has cope and drag on separate plate. Cope and drag pattern has 2 parts which are separately molded on molding box. After molding parts, these two separate parts are combined to make the whole cavity. Cope and drag pattern is nearly like two-piece pattern. This pattern types are utilized in the assembly of huge castings where the molds are very heavy and unhandy for a user.