This Part specifies the dimensional specifications and tolerances for retaining rings for plastic injection moulds. This section applies to positioning rings used in plastic injection moulds. This part also gives material guidelines and hardness requirements, and specifies the marking of retaining rings.
GB/T 4169.18-2006 Referenced Document
GB/T 4170-2006 Specification of components of injection moulds for plastics
GB/T 4169.18-2006 history
2006GB/T 4169.18-2006 Components of injection moulds for plastics.Part 18:Locating ring