US 11,938,665 B2Granted

Apparatus and process for molding bottle preforms

AssigneeS.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A.

InventorsAndrea Cavalet, Paolo Spinazze′, Federico Vescovo, Matteo Zoppas

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Abstract

A process for molding one or more bottle preforms, wherein molten plastic is injected into at least one molding cavity; and wherein air is drawn from the at least one molding cavity, through at least one channel for the air to pass from the at least one molding cavity towards the outside of the molding device, by means of suction means; and apparatus and device for performing such a process.

Claims16

Dependent claims

An apparatus for molding one or more bottle preforms by injecting molten plastic, comprising

at least one molding device provided
with at least one molding cavity adapted to receive the molten plastic,
and with at least one channel for air to pass from the at least one molding cavity towards the outside of the at least one molding device;
wherein said at least one molding device comprises
a first component, or core, adapted to mold an inner surface of the preform;
a second component, or lock ring, arranged about the first component;
and a third component, or neck ring, adapted to mold an outer surface of the preform neck;
wherein said at least one channel is partially delimited by said first component and by said third component and partially by said first component and by said second component;
wherein the first component comprises at least one first surface in contact with at least one second surface of the second component;
wherein said first surface and/or said second surface are provided with at least one groove which partially delimits said at least one channel;
wherein said first surface and said second surface are frustoconical in shape;
wherein said at least one channel is adapted to be connected to suction means adapted to draw air from the at least one molding cavity;
wherein the apparatus comprises said suction means connected to said at least one channel, which are adapted to draw air from said at least one molding cavity;
wherein the suction means are connected to the at least one molding device by means of a conduit system;
wherein said conduit system comprises a first stretch connected to a molding device of said at least one molding device;
wherein the first stretch is connected to a second stretch and to a third stretch;
wherein the second stretch is connected to said suction means;
wherein the third stretch is connected to means adapted to introduce air into the at least one molding device;
and wherein a first valve is provided between the first stretch and said suction means, and a second valve is provided between the first stretch and said means adapted to introduce air.

16 more elements

Dependencies are inferred from the claim text.

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Abstract

An apparatus for molding one or more bottle preforms by injecting molten plastic, comprising

at least one molding device provided
with at least one molding cavity adapted to receive the molten plastic,
and with at least one channel for air to pass from the at least one molding cavity towards the outside of the at least one molding device;
wherein said at least one molding device comprises
a first component, or core, adapted to mold an inner surface of the preform;
a second component, or lock ring, arranged about the first component;
and a third component, or neck ring, adapted to mold an outer surface of the preform neck;
wherein said at least one channel is partially delimited by said first component and by said third component and partially by said first component and by said second component;
wherein the first component comprises at least one first surface in contact with at least one second surface of the second component;
wherein said first surface and/or said second surface are provided with at least one groove which partially delimits said at least one channel;
wherein said first surface and said second surface are frustoconical in shape;
wherein said at least one channel is adapted to be connected to suction means adapted to draw air from the at least one molding cavity;
wherein the apparatus comprises said suction means connected to said at least one channel, which are adapted to draw air from said at least one molding cavity;
wherein the suction means are connected to the at least one molding device by means of a conduit system;
wherein said conduit system comprises a first stretch connected to a molding device of said at least one molding device;
wherein the first stretch is connected to a second stretch and to a third stretch;
wherein the second stretch is connected to said suction means;
wherein the third stretch is connected to means adapted to introduce air into the at least one molding device;
and wherein a first valve is provided between the first stretch and said suction means, and a second valve is provided between the first stretch and said means adapted to introduce air.

16 more elements