Method for producing a toothbrush, and toothbrush
AssigneeTrisa Holding AG
InventorsRoger KIRCHHOFER, Michael SCHÄR, Martin ZWIMPFER, Peter ZURFLUH
Life of this patent
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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. Manufacturing of the grip body is performed via an injection moulding tool with at least one tool cavity, and the grip body including a first, second, and third material component of a first, second, and third thermoplastic material, respectively.
Claims36
A method for manufacturing at least one grip body of a body care article, each of the at least one grip body having a grip part, a neck part, and a head part, said manufacturing take place via an injection moulding tool with at least one tool cavity, and each of the at least one grip body including a first, second, and third material component of a first, second, and third thermoplastic material, respectively, the method comprising steps of:
- manufacturing at least one intermediate grip body, each of the at least one intermediate grip body including a jacket body of the first material component and a core body of the second material component partially enveloped by the jacket body, whereby a hot-runner system injection moulds the first and second thermoplastic materials into at least one first tool cavity to form each of the at least one intermediate grip body by:
- injection moulding the first thermoplastic material into each of the at least one first tool cavity to partially fill each of the at least one first tool cavity with the first thermoplastic material;
- followed by a cooling phase of the injected first thermoplastic material, injection moulding the second thermoplastic material into each of the at least one first tool cavity partially filled with the first thermoplastic material to completely fill up each of the at least one first tool cavity with the second thermoplastic material injected into and through the injected first thermoplastic material, thereby forming the intermediate grip body of the first and second material component completely filling the at least one first tool cavity, wherein a flowable soul of the injected first thermoplastic material is displaced during the second thermoplastic material injecting and wherein the injected second thermoplastic material forms a break out from the first thermoplastic material;
- transferring each of the at least one intermediate grip body into a respective one of at least one second tool cavity;
- and
- injection moulding the third thermoplastic material into each of the at least one second tool cavity to form the third material component comprising at least one of a holding element, a thumb rest, a decorative element, or a covering element of the third material component on each of the at least one intermediate grip body to form the at least one grip body from the first, second, and third material component, wherein each of the third material components, in a region of a surface of a respective one of the at least one grip body, covers a section of the respective at least one grip body in the region of break-out of the second material component from the first material component, each of the third material components thereby contacting both of the corresponding first and second material components at the break-out region.
A method for manufacturing at least one grip body of a body care article, each of the at least one grip body having a grip part, a neck part, and a head part, said manufacturing take place via an injection moulding tool with at least one tool cavity, and each of the at least one grip body including a first, second and third material component of a first, second, and third thermoplastic material, respectively, the method comprising steps of:
- manufacturing the at least one intermediate grip body, each of the at least one intermediate grip body including a jacket body of the first material component and a core body of the second material component partially enveloped by the jacket body, whereby a hot-runner system injection moulds the first and the second thermoplastic materials into the at least one tool cavity to form each of the at least one intermediate grip body by:
- injection moulding the first thermoplastic material into each of the at least one tool cavity to partially fill each of the at least one tool cavity with the first thermoplastic material,
- followed by a cooling phase of the injected first thermoplastic material, injection moulding the second thermoplastic material into each of the at least one tool cavity partially filled with the first thermoplastic material to completely fill up each of the at least one tool cavity with the second thermoplastic material injected into and through the injected first thermoplastic material, thereby forming the intermediate grip body of the first and second material components completely filling the at least one tool cavity, wherein a flowable soul of the injected first thermoplastic material is displaced during the second thermoplastic material injecting,
- wherein an injection point of the second thermoplastic material is arranged on a rear side of the grip body, and
- the core body of the second thermoplastic material is completely surrounded by the jacket body of the first thermoplastic material, except for the injection point of the second thermoplastic material;
- transferring each of the at least one intermediate grip body into a respective one of at least one second tool cavity;
- and
- injection moulding the third thermoplastic material into each of the at least one second tool cavity to form the third material component comprising at least one of a holding element, a thumb rest, a decorative element, or a covering element of the third material component on each of the at least one intermediate grip body to form the at least one grip body from the first, second, and third material component.
A method for manufacturing at least one grip body of a body care article, each of the at least one grip body having a grip part, a neck part and a head part, said manufacturing take place via an injection moulding tool with at least one tool cavity, and each of the at least one grip body including a first, second and third material component of a first, second and third thermoplastic material, respectively, the method comprising steps of:
- manufacturing the at least one intermediate grip body in the at least one tool cavity, each of the at least one intermediate grip body including a jacket body of the first material component and a core body of the second material component partially enveloped by the jacket body, whereby a hot-runner system injection moulds the first and second thermoplastic materials into the at least one tool cavity to form each of the at least one intermediate grip body by:
- injection moulding the first thermoplastic material into the at least one tool cavity to partially fill each of the at least one tool cavity with the first thermoplastic material, and
- followed by a cooling phase of the injected first thermoplastic material, injection moulding the second thermoplastic material into each of the at least one tool cavity partially filled with the first thermoplastic material to completely fill up each of the at least one tool cavity with the second thermoplastic material injected into and through the injected first thermoplastic material, thereby forming the intermediate grip body of the first and second material component completely filling the at least one tool cavity, wherein a flowable soul of the injected first thermoplastic material is displaced during the second thermoplastic material injecting, wherein
- an injection point is arranged such that the second thermoplastic material is injected into the at least one tool cavity transversely to a longitudinal axis of the tool cavity,
- transferring each of the at least one intermediate grip body into a respective one of at least one second tool cavity;
- and
- injection moulding the third thermoplastic material into each of the at least one second tool cavity to form the third material component comprising at least one of a holding element, a thumb rest, a decorative element, or a covering element of the third material component on each of the at least one intermediate grip body to form the at least one grip body from the first, second, and third material component.
Dependencies are inferred from the claim text.