Package closures and methods and devices for producing package closures

A method of producing a package closure of plastic material by means of a mold comprising movable jaws, a counterpart, an outer first tool core part, an inner second tool core part and an ejector, wherein the package closure has an axis, and wherein the outer first tool core part, the inner second tool core part and the ejector are axially displaceable relative each other, comprising the steps of

• a) by means of the movable jaws and the counterpart forming an exterior of a cap of the package closure, and by means of the outer first tool core part and the inner second tool core part forming an interior of the cap, wherein an interior of an axially extending wall of the cap, at least an interior of a foldable portion of the cap and a radially outward facing side of a sealing ring of the cap is formed by the outer first tool core part, wherein the interior of a top portion of the cap and a radially inward facing side of the sealing ring is formed by the inner second tool core part, and wherein a hinge is formed in the cap by the movable jaws and the outer tool core part for opening of the cap,
• b) removing the jaws from the formed package closure,
• c) axially displacing at least one of the outer first tool core part and the second tool core part in relation to the other in a first direction, thereby disengaging the cap from the outer first tool core part while keeping the inner second tool core part engaged with the cap,
• d) axially displacing the inner second tool core part, the outer first tool core part and/or the ejector in relation to at least one of the others in the first direction or in an opposite second direction while folding the foldable portion inward to its folded position through an inherent flexibility of the package closure,
• e) displacing the package closure in relation to the second tool core part by the ejector to disengage the package closure from the second tool core part.