COMPOSANT PNEUMATIQUE FORMANT ELECTROVANNE ET INCORPORANT UN REGLAGE DE DEBIT, ET INSTALLATION DE SOUFFLAGE DE RECIPIENTS THERMOPLASTIQUES EQUIPEE D'UN TEL COMPOSANT

摘要

The invention relates to equipment for producing vessels made of a thermoplastic material by blowing or stretch-blowing heated blanks, in which at least one pre-blowing electrovalve is provided in the form of a pneumatic component (1), which comprises a body (2) through which a duct (3) extends between inlet (4) and outlet (5) openings for a pneumatic fluid at a pre-blowing pressure; a chamber (9) in the body comprises a mobile piston (10) connected to a stopper (8) capable of interaction with a seat (7) in said duct (3); a stop (21) in the chamber prevents any movement of the piston (10) in order to define an opening position of the stopper (8); the stop (21) is capable of movement in the chamber (9); the opening position of the stopper relative to the seat can thus be adjusted, and the flow rate of the fluid at the pre-blowing pressure in the duct (3) can be adjusted.