Method for ejecting a vessel carried by a mandrel by abutment of an ejection face against a bearing face of the neck arranged under the mouth of the vessel

A transport device (10) for ejecting a vessel (12), in particular a preform (12) made of thermoplastic material, carried by the transport device (10), in which the vessel (12) is provided with a cylindrical neck (16) with a vertical axis (A) that comprises a free upper end edge called a mouth (18), the transport device (10) comprising:

• at least one movable support (28) along a path;
• at least one mandrel (30) provided with a radial expansion for gripping the vessel (12) by vertical engagement of said radial expansion that is forced into the neck (16);
• a lower ejection face (64) that is mounted on the movable support (28), with the gripping mandrel (30) being mounted to slide vertically relative to the ejection face (64) for making it possible to extract the gripping mandrel (30) from the neck (16) during relative sliding of it by bringing the ejection face (64) into contact with an upper bearing face (24) vertically opposite the neck (16), with the gripping mandrel (30) sliding relative to the ejection face (64) between a lower transport position in which the engagement of the gripping mandrel (30) with the neck (16) is made possible, and an upper ejection position of the vessel (12) in which the ejection face (64) prevents the gripping mandrel (30) from engaging with the neck (16) by abutment against the bearing face (24) of the neck (16),
• wherein the bearing face (24) of the neck (16) is formed by a shoulder face that projects radially outward relative to the mouth (18) and that is arranged below the mouth (18) in the vertical direction,
• a movable support (28) along a path;
• a mandrel (30) for gripping the vessel (12) that is intended to be vertically engaged with the neck (16), with the gripping mandrel (30) being mounted to rotate on the movable support (28) around its axis (A), the gripping mandrel (30) comprising a lower face (50) for vertical positioning of the vessel (12) relative to the mandrel (30) against which the mouth (18) of the neck (16) is intended to be supported vertically during its engagement;
• and
• a lower ejection face (64) that is mounted on the movable support (28), with the gripping mandrel (30) being mounted to slide vertically relative to the ejection face (64) to make it possible to extract the mandrel (30) totally from the neck (16) during relative sliding of it by contact of the ejection face (64) with an upper bearing face (24) vertically opposite the neck (16), with the gripping mandrel (30) sliding relative to the ejection face (64) between a lower transport position in which the engagement of the gripping mandrel (30) with the neck (16) is made possible, and an upper position for ejection of the vessel (12) in which the ejection face (64) prevents the gripping mandrel (30) from engaging with the neck (16) by abutment against the bearing face (24) of the neck (16);
• wherein in the transport position of the mandrel (30), the ejection face (64) is arranged vertically below the positioning face (50) of the mandrel (30).

A transport device for ejecting a vessel (12) carried by a transport device (10), in which the vessel (12) is provided with a cylindrical neck (16) with a vertical axis (A) that comprises a free upper end edge called a mouth (18), the transport device (10) comprising:

• at least one movable support (28) along a path;
• at least one mandrel (30) for gripping the vessel (12) by vertical engagement with the neck (16);
• a lower ejection face (64) that is mounted on the movable support (28), with the gripping mandrel (30) being mounted to slide vertically relative to the ejection face (64) for making it possible to extract the gripping mandrel (30) from the neck (16) during relative sliding of it by bringing the ejection face (64) into contact with an upper bearing face (24) vertically opposite the neck (16), with the gripping mandrel (30) sliding relative to the ejection face (64) between a lower transport position in which the engagement of the gripping mandrel (30) with the neck (16) is made possible, and an upper ejection position of the vessel (12) in which the ejection face (64) prevents the gripping mandrel (30) from engaging with the neck (16) by abutment against the bearing face (24) of the neck (16),
• wherein the bearing face (24) of the neck (16) is formed by a shoulder face that projects radially outward relative to the mouth (18) and that is arranged below the mouth (18) in the vertical direction;
• a movable support (28) along a path;
• a mandrel (30) for gripping the vessel (12) that is intended to be vertically engaged with the neck (16), with the gripping mandrel (30) being mounted to rotate on the movable support (28) around its axis (A), the gripping mandrel (30) comprising a lower face (50) for vertical positioning of the vessel (12) relative to the mandrel (30) against which the mouth (18) of the neck (16) is intended to be supported vertically during its engagement;
• and
• a lower ejection face (64) that is mounted on the movable support (28), with the gripping mandrel (30) being mounted to slide vertically relative to the ejection face (64) to make it possible to extract the mandrel (30) totally from the neck (16) during relative sliding of it by contact of the ejection face (64) with an upper bearing face (24) vertically opposite the neck (16), with the gripping mandrel (30) sliding relative to the ejection face (64) between a lower transport position in which the engagement of the gripping mandrel (30) with the neck (16) is made possible, and an upper position for ejection of the vessel (12) in which the ejection face (64) prevents the gripping mandrel (30) from engaging with the neck (16) by abutment against the bearing face (24) of the neck (16),
• wherein in the transport position of the mandrel (30), the ejection face (64) is arranged vertically below the positioning face (50) of the mandrel (30),
• wherein the ejection face (64) is carried by a lower end annular edge of an ejection bell (52) that is intended to cover the neck (16) of the vessel (12) when the mandrel (30) occupies its lower transport position, and
• wherein the ejection bell (52) comprises lateral aeration louvers (66).