US 11,938,665 B2
Apparatus and process for molding bottle preforms
Andrea Cavalet, Ponte Nelle Alpi (IT); Paolo Spinazze′, San Vendemiano (IT); Federico Vescovo, Padua (IT); and Matteo Zoppas, Conegliano (IT)
Assigned to S.I.P.A. SOCIETA' INDUSTRIALIZZAZIONE PROGETTAZIONE E AUTOMAZIONE S.P.A., Vittorio Veneto (IT)
Appl. No. 17/754,100
Filed by S.I.P.A. SOCIETA′ INDUSTRIALIZZAZIONE PROGETTAZIONE E AUTOMAZIONE S.P.A., Vittorio Veneto (IT)
PCT Filed Oct. 1, 2020, PCT No. PCT/IB2020/059206
§ 371(c)(1), (2) Date Mar. 23, 2022,
PCT Pub. No. WO2021/064630, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 102019000017675 (IT), filed on Oct. 1, 2019.
Prior Publication US 2022/0339831 A1, Oct. 27, 2022
Int. Cl. B29C 45/17 (2006.01); B29B 11/08 (2006.01); B29C 45/26 (2006.01); B29C 45/34 (2006.01); B29K 67/00 (2006.01)
CPC B29C 45/1753 (2013.01) [B29B 11/08 (2013.01); B29C 45/2602 (2013.01); B29C 45/261 (2013.01); B29C 45/34 (2013.01); B29K 2067/003 (2013.01)] 16 Claims
OG exemplary drawing
 
1. 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.