Patent ID: 8858862
Filing Date: 2014-10-14
Classification: B29C

Abstract:
1. Stretch blow moulding machine for forming parisons of plastic into containers, comprising: a blow moulding unit which has at least a first mould carrier and a second mould carrier for accommodating in each case at least one blowing mould part, the first and second mould carriers being movable relative to one another, connectable to one another to form a first working space for receiving the containers, and detachable from one another to release the containers, a second working space being formed between at least one blowing mould part and at least the first mould carrier; and a fluid communication system for leading a working fluid which is feedable to the first working space and the second working space, wherein, on at least one of the first mould carrier and an expanding device, which is provided for feeding the working fluid into the inside of the containers, wherein at least two valve devices are provided to separate the fluid communication system from the first and the second working space, wherein at least one valve device for intermittent complete disconnection of the fluid communication between at least one of the working spaces and the fluid communication system is arranged in a manner such that the pressure of the working fluid within the fluid communication system is independent of the changes in the state of the second working space when the fluid communication is disconnected.