Blowing device comprising a nozzle and a supply duct forming an obtuse angle

摘要

Disclosed is a blowing device (10) for forming containers (24) from thermoplastic material preforms. The device (10) includes a blowing nozzle (12) including a bottom outlet opening (28) for a pressurized blowing fluid to leave along a vertical outlet axis (28) and a single duct (14) for supplying the nozzle (12) with blowing fluid that leads into the nozzle (12), via a top supply opening (31), along an axis that is completely radial relative to the outlet axis (A2) of the nozzle (12). The blowing device is characterized in that the upstream end section of the supply duct (14) leads into the nozzle (12) along a branching axis (B) that forms an obtuse angle (a) with the outlet axis (A1) of the nozzle (12) such that the blowing fluid leaving the supply duct (14) is directed downward.

主权项

1. A blowing device (10) for forming containers (24) from preforms of thermoplastic material, the device (10) comprising:
a blowing nozzle (12) which comprises at the lower end thereof an outlet opening (28) for a blowing fluid under pressure along a vertical outlet axis (A2); and a single supply duct (14) which is for supplying the nozzle (12) with blowing fluid and which opens in an upper inlet portion (12A) of the nozzle (12) via an upper supply opening (31), the downstream end portion of the duct (14) being generally orientated along the inlet axis (A1) of the inlet portion (12A) of the nozzle (12), the inlet axis (A1) forming a non-zero angle (β) with the vertical outlet axis (A2), wherein the downstream end portion of the supply duct (14) opens in the nozzle (12) along a branching axis (B) which forms an obtuse angle (α) with the inlet axis (A1) of the nozzle (12) so that the blowing fluid which is discharged from the supply duct (14) is directed downward.