A specification is intended to satisfy functional, aesthetic and economic requirements by controlling variations in the final product.The part must meet the complete set of requirements as prescribed in the specifications.
Design specifications :
• Material brand name and grade, and generic name (e.g., Zytel® 101, 66 nylon)
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• Surface finish.
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• Parting line location desired
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• Flash limitations
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• Permissible gating and weld line areas (away from critical stress points)
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• Locations where voids are intolerable
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• Allowable warpage
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• Tolerances
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• Color
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• Performance considerations
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Walsh's Plastic consulting. 