Cartridge having constant wall thickness and used for dispensing viscous materials

摘要

This cartridge is for storage and ejection of viscous materials. A novel feature is its wall thickness (5), which is the same over the entire length. Also claimed is the corresponding injection mould. The mould core (1) is cylindrical from the front, up to a transition section (9). From then on, to the rear, the form widens conically, either immediately, or through a transition radius. The transition section is located at about two thirds of the length from the front. The mould matrix and core are concentric, their spacing corresponding with the cartridge wall thickness. A novel feature is that the inner and outer diameters of mould and core are locally-parallel over the entire length of the cartridge.