Core

The core of a mould tool, as described by the toolmaker, is the part that forms the contour of a cavity in the plastic part through material displacement. In a simple open-and-shut mould, the core is normally located on the ejector side. However, there are various special designs of mould cores in injection moulds:

1. Sliding cores: These enable the demoulding of lateral or internal contours. They can be moved laterally to allow complex shapes.
2. Folding cores: These are used for demoulding internal, all-round undercuts. They can fold together to facilitate removal of the workpiece.
3. Lost fusible cores: These are used to form media-carrying internal contours in finished parts. They are melted or removed during the process and leave the desired contour in the workpiece.

Each of these special designs has its own applications and makes it possible to produce complex shapes and structures in plastic parts.