1.0 Introduction
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The equipment mostly used or applied in the industries and manufacturing setups requiring the production of definite patterns, shapes and different designs, embossments and others, are usually moulds.
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The moulds used for the numerous types of plastic and the several types of moulding methods in commercial use constitute a controlling factor in the molding industry. The most advantageous utilization of both plastic and molding equipment requiring a properly designed and constructed mould.
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The application of moulds depends on its ability to withstand pressure, corrosion and distortion.
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Mould can be defined as a pattern constructed for the manufacture of the same prototype. The material of construction of moulds varies from one operation to another. The need for the designing and development of moulds of different materials, composition, texture, shape, resistance arises as a result of the diverse application of moulds in manufacturing industries.
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Early moulds were used by blacksmiths in construction and designing materials of different shapes and sizes. Moulds basically consists of a cavity and a plunger, or force. Most moulds also include an ejection mechanism for removing the moulded article.
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