Plant for making containers of thermoplastic material

摘要

A plant for making containers of thermoplastic material in continuous cycle comprises: a rotary molding machine (1) configured to make parisons (2) of thermoplastic material having a body (3) with a closed bottom and a neck (4) which defines an opening; an oven (5) for heating the parisons (2), connected to the molding machine (1) and equipped with heating means (6) operating on the body (3) of the parisons (2); a rotary blow-molding machine (7) configured to receive the parisons (2) heated in the oven (5) and to blow-mold them in molds (8) to make the containers; and a management unit (9) for the plant (10), configured to switch off the oven (5) heating means (6) during a shutdown period of the blow-molding machine (7) but without interrupting the operation of the molding machine (1), so as to enable the parisons (2) located in the oven (5) to cool down during their transit through the oven (5).

主权项

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.