Blow Moulding Machine For The Moulding Of Containers

Blow Moulding Machine For The Moulding Of Containers
A blow moulding machine for the manufacture of containers based on preforms, includes at least one rotating turntable furnished with a console supporting two half-moulds that are designed to form the body of the container and a mould base that is designed to form the bottom of the container, of the type in which the mould base is driven so as to slide vertically by a cam system, characterized in that the console includes at least one return member that forces the mould base towards its top position, and in that the cam system includes a cam follower element that is slidingly connected to the mould base and that interacts with a control surface oriented downwards.
The present invention relates to a blow molding machine for the manufacture of containers.
The present invention relates more particularly to blow moulding machines for the manufacture of containers based on preforms made of thermoplastic by bottle blow moulding machine, comprising at least one plate that is mounted so as to rotate about a substantially vertical axis and that supports at least one console, of the type in which the console supports two half- moulds that are designed to form the body of the container and a mould base that is designed to form the bottom of the container, of the type in which the two half- moulds are mounted so as to be movable relative to one another between a closed position suitable for moulding and an open position suitable for stripping and loading a preform, of the type in which the mould base is driven so as to slide relative to the console, in a sliding direction substantially parallel to the axis of rotation, by a cam system between a top position suitable for moulding and a bottom position suitable for stripping, and of the type in which the mould base is designed to be nested in the half- moulds when it occupies its top position and when the half- moulds occupy their closed position.
For blow moulding or stretch- blow moulding machine such as bottles based on heated preforms made of thermoplastic such as polyethylene terephthalate (PET), it is a known practice to use moulds consisting of two half- moulds that can be moved relative to one another.
The half- moulds can be moved between an open position that corresponds to an operation of loading the mould with a preform or to an operation of stripping the mould by removing the bottle obtained by the moulding operation, and a closed position that corresponds to a moulding operation.