Staking is a process that is specially suited to connecting parts made from dissimilar materials (e.g., plastic to metal). The plastic part is provided with a protrusion that ?ts through a hole in the other part. The protrusion is then deformed through cold ?ow or melting of the plastic to form a head that mechanically locks the two components together. Staking is a quick and economical technique and has the advantage that no consumables, such as rivets or screws, are required. Staking can only be used to join thermoplastics; PS, ABS, SAN, acrylic, PC, PA, acetal, PPO, PP, PE and PSO are commonly used for staking

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