Patent ID: 7311868

Claim:
A tool for injection moulding of an opening arrangement of plastic in a hole in a sheet- or web-shaped packaging material, the hole defining a hole edge and the tool comprising at least one first tool part adapted to be brought into contact with a first side of the packaging material, and at least one second tool part adapted to be brought into contact with a second side of the packaging material, in such a manner that there is formed a mould cavity which surrounds said hole edge, together with a part of the first side of the packaging material, as well as a part of the second side of the packaging material in connection with the hole edge, the mould cavity displaying an inlet for molten plastic and, opposing the inlet, an end gap for the extension of the packaging material out of the tool, the end gap being located between the first and the second tool parts, the inlet forming a deflection from a first flow direction in a flow gap to a second flow direction into said mould cavity that is different from the first flow direction, wherein the first tool part, at said inlet, displays a continuous throttle lip which projects in a direction which substantially coincides with said first flow direction.