CPC B29C 49/42832 (2022.05) [B29C 49/62 (2013.01); B29C 2049/627 (2013.01); B29L 2031/7158 (2013.01)] | 3 Claims |
1. A system for blowing a parison for making a container comprising:
a mould (2) which delimits a space (20) for forming the container starting from the parison;
a means (4) for introducing a pressurised fluid into the parison placed in the mould (2);
a gas suction means (3) comprising:
i) at least a first opening (21) placed along a wall of the mould (2);
ii) a second opening (22) which leads into said forming space (20); and
iii) an aspirator (30) operatively connectable with both the first and with the second opening (21, 22);
a first valve means (51) which enables/prevents fluid communication between the aspirator (30) and the first opening (21); and
a second valve means (52), which can be operated separately from the first valve means (51), which enables/prevents fluid communication between the aspirator (30) and the second opening (22);
wherein the first and second valve means (51, 52) are two distinct valves placed on two distinct conduit sections; and
wherein the first opening (21) leads into the forming space (20) indirectly by means of a groove located on a part of the mould (2) and opens towards an inside of the forming space (20).
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