US 11,999,092 B2
Method and system for blowing a parison
Stefano Tonti, Parma (IT); and Michele Varaschin, Vittorio Veneto (IT)
Assigned to SIAPI S.R.L., San Vendemiano (IT)
Filed by SIAPI S.R.L., San Vendemiano (IT)
Filed on Feb. 8, 2023, as Appl. No. 18/166,168.
Claims priority of application No. 102022000002438 (IT), filed on Feb. 10, 2022.
Prior Publication US 2023/0249392 A1, Aug. 10, 2023
Int. Cl. B29C 49/62 (2006.01); B29C 49/42 (2006.01); B29L 31/00 (2006.01)
CPC B29C 49/42832 (2022.05) [B29C 49/62 (2013.01); B29C 2049/627 (2013.01); B29L 2031/7158 (2013.01)] 3 Claims
OG exemplary drawing
 
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).