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US 9,211,669 B2Granted
Injection mould component for preforms made of plastic material
AssigneeS.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A.
InventorsMatteo Zoppas, Andrea Cavalet
Life of this patent
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Abstract
An injection mould component for moulding the outer surface of a preform neck, which allows improved cooling of the preform neck inside the mould, while at the same time reducing the mould cycle time. A related production process of said injection mould component, which allows the section of the cooling channels to be optimised, determining a more effective cooling, is also described.
Claims10
An injection mould component for moulding the external surface of a preform neck made of plastic material, comprising
- a pair of half-inserts defining, when assembled in the injection mould, a moulding surface of said external surface of the neck;
- said moulding surface defining a longitudinal axis and comprising a first annular groove for making a first annular flange of the preform neck;
- a cylindrical end portion, arranged at a first side of said first annular groove, for making a corresponding cylindrical end portion of the preform neck;
- and a portion proximal to said first annular groove and arranged at a second side of said first annular groove, for making a corresponding portion proximal to the first annular flange,
- wherein each half-insert is provided with an internal circuit for the passage of a cooling liquid;
- said internal circuit being provided with
- a first curved stretch and a second curved stretch provided in proximity of said first annular groove of the moulding surface;
- a third curved stretch provided in proximity of said cylindrical end portion of the moulding surface;
- a fourth curved stretch provided in proximity of a portion of the moulding surface;
- wherein the third curved stretch and the fourth curved stretch are branches of said first curved stretch and converge in said second curved stretch,
- wherein the first curved stretch and the second curved stretch have a respective curvilinear axis, arranged on a first plane which is substantially perpendicular to a plane containing the longitudinal axis of the moulding surface, and are symmetrically arranged with respect to a centre-line plane Z of the half-insert,
- wherein the third curved stretch has a curvilinear axis arranged on a second plane and the fourth curved stretch has a curvilinear axis arranged on a third plane, said second plane and third plane being substantially parallel to said first plane,
- and wherein said first, second and third planes are three distinct planes.
10 more elements
Dependencies are inferred from the claim text.