Abstract: The disclosure relates to a tool (1a, 1b, 2)for injection moulding of an opening arrangement (20) of plastic in a hole in a packing material (9), the hole defining a hole edge (8) and the tool displaying a mould cavity (7) which surrounds the hole edge (8) together with a part of a first side (9a), as well as a part of a second side (9b) of the packing material in connection with the hole edge, the mould cavity (7) displaying an inlet (10) for molten plastic and, opposing the inlet, an end gap (11) for the extension of the packaging material (9) out of the tool, the inlet (10) displaying a deflection from a first flow direction (F1) in a flow gap (5) to a second flow direction (F2) into the mould cavity (7). According to the invention, the tool (1a, 1a) displays, at said inlet (10), a throttle lip (12) which projects in a direction which substantially coincides with said first flow direction (F1).

Abstract: The disclosure relates to a tool (1a, 1b, 2) for injection moulding of an opening arrangement (20) of plastic in a hole in a packaging material (9), the hole defining a hole edge (8) and the tool displaying a mould cavity (7) which surrounds the hole edge (8) together with a part of a first side (9a), as well as a part of a second side (9b) of the packaging material in connection with the hole edge, the mould cavity (7) displaying an inlet (10) for molten plastic and, opposing the inlet, an end gap (11) for the extension of the packaging material (9) out of the tool, the inlet (10) displaying a deflection from a first flow direction (F1) in a flow gap (5) to a second flow direction (F2) into the mould cavity (7). According to the invention, the tool (1a, 1b) displays, at said inlet (10), a throttle lip (12) which projects in a direction which substantially coincides with said first flow direction (F1).