Method for producing a toothbrush, and toothbrush
AssigneeTrisa Holding AG
InventorsRoger Kirchhofer, Michael Schar, Martin Zwimpfer, Peter Zurfluh
Life of this patent
Estimating the term…
Abstract
A grip body of a body care article, such as toothbrush, includes a grip part, a neck part and a head part. The grip body includes a first and a second material component of a thermoplastic plastic. The first and the second material component have a common injection point that is arranged outside a mould partition line formed by the mould partition.
Claims18
A grip body of a body care article, such as toothbrush, comprising a grip part, a neck part and a head part, wherein the grip body comprises a first and a second material component of a thermoplastic plastic,
- wherein the first and the second material component have a common injection point that is arranged outside a mould partition line formed by the mould partition.
A method for manufacturing an elongate grip body of a body care article, such as toothbrush, of at least two material components of a thermoplastic plastic, comprising the injection moulding of the material components in an injection moulding tool by way of a hot-runner method,
- wherein at least two plastic components are injected via a common injection point into a common tool cavity of the injection moulding tool by way of the following steps:
- injection moulding a first material component into the tool cavity and a partial filling of the tool cavity with the first material component through a hot-runner nozzle;
- cooling the injected first material component in the tool cavity, wherein at least one flowable soul is retained in the first material component;
- injection moulding a second material component into the tool cavity of the injection moulding tool through the same hot-runner nozzle and further, preferably complete filling of the tool cavity with the second material component;
- wherein the flowable soul of the first material component previously injected into the tool cavity is displaced in the material flow direction during the injection moulding of the second material component, and the first material component that preferably bears on the cavity wall and is at least partly solidified at least partly surrounds the flowing-in second material component.
Dependencies are inferred from the claim text.