Patent ID: 9636862
Date: 2017-05-02
CPC Classifications: B29C

Claim:
1. A plant for making containers of thermoplastic material in continuous cycle comprising: a parison moulding machine configured to make parisons of thermoplastic material having a body with a closed bottom and a neck which defines an opening; a heating oven configured to receive the parisons feeding out of the parison moulding machine and equipped with heating means operating on the bodies of the parisons, wherein the oven has a conveyor configured to transport the parisons along a predetermined path within the oven; a rotary blow-moulding machine configured to receive the parisons heated in the oven and to blow-mould them in moulds to make the containers, characterized in that it comprises a plant management unit configured to switch off, or to reduce the heating power of, the oven heating means and to keep the conveyor operating, during a period when the blow-moulding machine is shut down, wherein the management unit is configured to keep the parison moulding machine operating, during said period when the blow-moulding machine is shut down, whereby the parisons located in the oven can cool down during their transit through the oven.