RADICALLY REPEATABLE SCREW TIP

摘要

A shaft and retaining bushing assembly designed to restrict the forward motion of the ring to determine stroke during plasticating is a key feature of a new patent-pending, slid-ing-ring nonreturn valve. The ring is forced against the assembly through viscous drag. Then the plastic's hydraulic pressure transforms the sliding frictional force that usually occurs between the shaft and bushing into a radial force, resulting in very low pressure drop and consistent part weight, shot after shot.