A mould, and tools for such mould
AssigneeTetra Laval Holdings & Finance S.A.
InventorPeter VIGHAGEN
Life of this patent
Estimating the term…
Abstract
An inner mould tool forming part of a mould to be used during injection moulding of plastic articles, such as plastic tops for liquid food packages, is provided. The inner mould tool comprises an outer surface defining the interior surface of the plastic article to be produced, wherein the longitudinal end of the inner mould tool is provided with a bushing having a planar surface defining the longitudinal end of the inner mould tool and being configured to be in contact with mating outer mould tools during injection moulding. The bushing is provided with side walls extending from the planar surface, said side walls forming part of the outer surface of the inner mould tool.
Claims12
An inner mould tool forming part of a mould to be used during injection moulding of a plastic article, such as plastic tops for liquid food packages, wherein the inner mould tool comprises an outer surface defining the interior surface of the plastic article to be produced, wherein the longitudinal end of the inner mould tool is provided with a bushing having a planar surface defining the longitudinal end of the inner mould tool and being configured to be in contact with mating outer mould tools during injection moulding, the bushing being provided with side walls extending from the planar surface, said side walls forming part of the outer surface of the inner mould tools, wherein the inner mould tool comprises a neck part and a spout part, wherein the side walls of the bushing form the longitudinal end of the spout part.
A mould to be used during injection moulding of plastic articles, such as plastic tops for liquid food packages, comprising an inner mould tool and at least two outer mould tools, said mould tools together defining a cavity to receive molten plastic material during injection moulding, wherein the longitudinal end of the inner mould tool is provided with a bushing having a planar surface defining the longitudinal end of the inner mould tool and being configured to be in contact with mating outer mould tools during injection moulding, wherein the bushing is provided with side walls extending from the planar surface, said side walls being arranged at a distance from the outer mould tools during injection moulding.
A method for injection moulding a plastic article onto a sleeve of a packaging material, comprising:
- arranging the sleeve of packaging material onto a mandrel,
- moving two outer mould tools towards an inner mould tool being arranged on said mandrel until the two outer mould tools contact each other, injecting molten plastic material into a cavity formed between the inner mould tool and the outer mould tools, p1 pressing said outer mould tools against the inner mould tool thereby pressing the injected molten plastic material inside the cavity formed between the inner mould tool and the outer mould tools, whereby the outer mould tools are guided in a first direction by a planar surface of a bushing provided on the inner mould tool, and in a second direction only by the outer surface of the sleeve, wherein the bushing is provided with side walls extending from the planar surface, said side walls forming part of the outer surface of the inner mould tool.
Dependencies are inferred from the claim text.