S.i.p.a. Societa' Industrializzazione Progettazione E Automazione S.p.a.

S.i.p.a. Societa' Dustrializzazione Progettazione E Automazione S.p.a.

Andrea Martegani

Matteo Zoppas

Andrea Cavalet

Paolo Spinazze′

Giorgio Dam

A component of an injection molding apparatus for conveying a flow of molten plastic material from a supply channel to an injection channel coaxially crossed by a shutter, said component comprising a body provided with

Component of an injection molding apparatus

An injection apparatus for injecting molten plastic into a mold of articles made of thermoplastic material including bottle preforms. The injection apparatus includes an injection nozzle and a shutter for controlling flow of the molten plastic through the injection nozzle. A cylinder-piston system moves the shutter from open and closed positions of the injection nozzle. The cylinder-piston system includes a first chamber with a first passage for introducing fluid into the first chamber to open the shutter, and a second passage, different from the first passage, for discharge of fluid and of possible particles from the first chamber. A fluid distribution device with a first channel is connected to the first passage, and a second channel different from the first channel is connected to the second passage. The cylinder-piston system includes a second chamber having a third passage for introducing fluid into the second chamber to close the shutter.

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Conegliano, Italy

Andrea Martegani