| 摘要 |
A method and an apparatus for the economical production of containers from thermoplastic material with a blow moulding machine (3) are disclosed. For shaping the containers at least one first pressure channel (21) is provided, supplying a first pressure. Likewise at least one second pressure channel (22) is provided, supplying a second pressure, wherein the first pressure is lower than the second pressure. The air in the first pressure compartment (21) is used for the pre-blowing or for other blowing steps of the containers. The air in the second pressure compartment (22) is used for the final blowing of the containers. The final blown containers are vented into the first pressure compartment (21). A control unit is provided which maintains an essentially constant pressure in the first pressure compartment during the pre-blowing and the venting into the first pressure compartment. A pressure level of the external pressure reservoir (20) can be adjusted accordingly.
|
