Collapsible core for use as part of e.g. plastic coating tool, has segments whose contact surfaces form dovetail-shaped guide that is not disrupted from control core, where retaining collars are formed on segments

摘要

The core has wedge-shaped intermediate and main segments (1, 3) whose contact surfaces form a dovetail-shaped chord that is not disrupted from a control core (2). A V-shaped segment guide is disrupted from the control core. Retaining collars are formed on the segments. The intermediate segments are arranged between the main segments. The intermediate and main segments are arranged around a central core, where outer contour of the core exhibits rectangular or square-shaped cross-section. The central core is axial displaceably arranged against a plastic coating tool.