Forming machine comprising a communication pipe between a compensation chamber and a nozzle
AssigneeSidel Participations
InventorsNicolas Chomel, Frederic Lecomte
Life of this patent
Estimating the term…
Abstract
A machine (10) for forming containers made of a thermoplastic material, includes: a mold consisting of two half-molds (12A, 12B) defining a molding cavity (14); a forming pipe (24) which couples the molding cavity (14) to a pressurized-fluid source (26), and which is capable of being closed off by a valve (32); a compensation chamber (34) which is combined with a half-mold (12A); a compensation pipe (40) which couples the compensation chamber (34) to a pressurized-fluid source (26) parallel to the forming pipe (24); and a pipe (44) for bypassing the compensation pipe (40), characterized in that the bypass pipe (44) is coupled to the forming pipe (44) between the valve (32) and the molding cavity (14).
Claims14
A machine (10) for forming containers made of thermoplastic material, comprising:
- a mold made of at least two half-molds (12A, 12B) delimiting a molding cavity (14) when their two joint faces are clamped transversely together, the molding cavity (14) being intended to receive a container with a neck;
- two supports (22A, 22B), each of which carries an associated half-mold (12A, 12B);
- a forming pipe (24) able to connect via a nozzle (28) the neck of the container held in the molding cavity (14) to at least one fluid source (26) at a forming pressure (Pf);
- first controlled sealing means interposed in the forming pipe (24);
- at least one escape pipe (30) connected as a bypass to the forming pipe (24) between the first controlled sealing means and the nozzle (28);
- second controlled sealing means interposed in each escape pipe (30);
- at least one compensation chamber (34) at fluid pressure which is interposed transversely between at least one support (22A) and the associated half-mold (12A);
- a compensation pipe (40) which connects the compensation chamber (34) to a source (26) of fluid at a working pressure, the compensation pipe (40) being arranged parallel to the forming pipe (24);
- third controlled sealing means interposed in the compensation pipe (40);
- a bypass pipe (44) connected as a bypass to the compensation pipe (40) between the third sealing means and the compensation chamber (34);
- fourth controlled sealing means interposed in the bypass pipe (44);
- characterized in that the bypass pipe (44) is connected to the forming pipe (24) between the first sealing means and the nozzle (28).
Dependencies are inferred from the claim text.