Collapsible cores

The mechanical collapsible cores are made of an inner core and some segments connected by a properly designed guiding system. During the ejection phase the segments slide along the inner core performing a radial movement which allows to release an internal undercut. Internal undercuts on round, square or oval parts can be easily released during the ejection process. Multi start threads or a combination of right- and left-handed threads can also be released. The dimensional stability of parts injected using mechanical collapsible cores meets the highest requirements. An accuracy of ±0,02 mm can be achieved for both flatness and roundness.

Undercuts - Collapsible cores