US 11,813,786 B2 · Preform and container adapted for accommodating an insert piece, with methods and apparatus for their production

Abstract

The invention provides a mould core and injection moulding apparatus for the production of a preform using a mould core which in the zone for defining the neck part of the preform comprises a combination of a raised portion and a shallow groove with a depth of 0.01 to 1 mm provided in the raised portion, for defining an internal attachment means in the neck of the preform. The invention also provides a preform and a container made from the preform, with internal attachment means in the neck. The internal attachment means is carried out rotation symmetrically with respect to the longitudinal axis of the preform. The combinations with an insert piece, preferably a pouring spout, flexible hose or dosing cap, have also been described. Furthermore, the invention provides an injection moulding method for the preform production and a stretch blow moulding method for the container production.

Claims20

Dependent claims

A method for injection moulding of a preform adapted for stretch blow moulding of a container, the preform comprising a bottom, a tubular wall extending upwards from the bottom in an elongated manner thereby forming a body part and a neck part following the body part, the neck part located opposite the bottom forming a pouring opening, and the neck part being provided with an internal attachment means for accommodating an insert piece, the method comprising the following steps:

inserting a mould core into an injection mould thereby forming a mould for defining the preform, wherein the mould core, in a zone for defining said neck part, comprises a combination of a raised portion and a shallow groove with a depth of 0.01 to 1 mm provided in the raised portion and rotationally symmetrical with respect to a longitudinal axis of the mould core, for defining the internal attachment means;
injecting into the mould a thermoplastic plastic composition with stretch blow mouldable material, thereby forming the preform provided with the internal attachment means;
removing the mould core and the injection mould, with release of the aforementioned preform with internal attachment means.

A preform arranged to be subjected to stretch blow moulding of a container, the preform comprising a bottom, a tubular wall extending upwardly from the bottom in an elongated manner thereby forming a body part and a neck part following the body part,

wherein the neck part located opposite the bottom forms a pouring opening, and the neck part is provided with an internal attachment means for accommodating an insert piece,
wherein the preform comprises a stretch blow mouldable thermoplastic composition,
wherein said internal attachment means comprises a combination of a slight protrusion with height 0.01 to 1 mm on an internal wall of the neck part followed by a stepwise narrowing of the neck part towards the body part, the combination being adapted for form-fitting accommodation of an insert piece and the attachment means is rotationally symmetrical with respect to a longitudinal axis of the preform.

A thermoplastic plastic container obtained by injection stretch blow moulding, comprising a bottom part, a body part which extends upwardly from the bottom part and a neck part following the body part, the neck part situated opposite the bottom part forming a pouring opening,

wherein the neck part is provided with an internal attachment means for accommodating an insert piece comprising a combination of a slight protrusion with height 0.01 to 1 mm on an internal wall of the neck part followed by a stepwise narrowing of the neck part towards the body part;
wherein the combination is adapted for snugly accommodating an insert piece and the attachment means is rotation symmetrically carried out with respect to a longitudinal axis of the plastic container.

Dependencies are inferred from the claim text.

Preform and container adapted for accommodating an insert piece, with methods and apparatus for their production

Life of this patent

Preform and container adapted for accommodating an insert piece, with methods and apparatus for their production

Life of this patent

Abstract

Claims20