Injection moulding tool, method of injection moulding and a packaging container provided with an injection-moulded opening arrangement
US7311868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2002 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Mar 9, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/565
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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). The invention also relates to a method of injection moulding, as well as to a packing container with an injection moulded opening arrangement (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.