The Sand Casting Types of Pattern

Patterns are of different types, all of which satisfy the requirements of certain solutions.

Pattern can for some be many different ways, are classified into the following main types:

Solid pattern – A pattern solid model of the part as one piece. It is easy to fabricate, but can cause some difficulties for the model. The line must be separated and determined runner system separately. Solid Patterns are usually used for geometrically simple parts that are produced in low quantities.

Split pattern – the split pattern models two separate pieces that meet along the parting line of the mold. Using a unique two-piece mold allows the cavities in the deal and draw to separate and determine the parting line already. Stock split generally used for geometrically complex parts are produced in moderate quantities.

Match-plate pattern – game-plate pattern is like a split pattern, except that each half of the pattern is connected to another side of the plate only. The plate is usually made of wood or metal. Pattern design ensures proper alignment of the mold cavities in the deal and draw and the runner system can be included on the match plate. Match-plate patterns used for producing larger quantities and are often used when the automated process.

Cope and drag pattern – A deal and suck like pattern pattern plate game, except that each half of the pattern to the unique plate and the mold halves are made independently. Just as a pattern plate game, the plates to ensure proper alignment of the mold cavities in the deal and can drag and runner system to include the plates. Cope and drag patterns are often more desirable for projection, where the game-plate pattern would be too heavy and cumbersome. They are also used to produce larger quantities and are often used when the automated process.

Gated patterns – gated pattern is loose pattern that the gating system is included as part of the pattern. This eliminates the time and the inconsistencies associated with hand-cut the gates and runners. Also, since the gating system designed and constructed as part of the pattern, the consistency of flow of molten metal into the casting and feeding during solidification improved solutions. Gated patterns are appropriate for pouring small quantities of castings when quick turn around and low cost is important.

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