Process for the shaping of the surface of a metal container
A process for the shaping of the side surface of a metal body or container ( 10 ) such as an aerosol or a beverage bottle for food or technical use, obtained by progressive deformation operating steps of its side surface carried out in sequence on a machine having an intermittent rotating table, an opposite alternate translatory motion plate, a loading drum, gripping pliers of the bodies, deformation and possibly embossing and/or debossing tools and an unloading drum of the same bodies, the process including the steps: feeding the bodies ( 10 ) on the machine provided with an intermittent rotating table and of an opposite translatory motion plate; gripping the bodies along a limited area ( 12 ) between 10.0 and 35.0 mm, of their side surface from the bottom with a fixed or an axially rotating gripping plier; carrying out a broad deformation ( 18 ) on the side surface of the bodies ( 10 ) with tools working from the inner and/or outer part of the same bodies.
1. A process for the shaping of a side surface of a metal body or container ( 10 ), obtained by progressive deformation operating steps of its side surface carried out in sequence on a machine comprising at least an intermittent moving rotating table, at least an opposite alternate translatory motion plate, a loading drum, gripping pliers of the metal body, deformation and optionally embossing and/or debossing tools and an unloading drum for said metal body, said process comprising the steps consisting of:
feeding said body ( 10 ) on the machine provided with at least one intermittent rotating table and with at least one opposite translatory motion plate;
gripping said body ( 10 ) along an area of the side surface from the bottom with a fixed or an axially rotating gripping means or plier;
carrying out a deformation on the side surface of the body ( 10 ) with tools working from the inner and/or the outer directions of the body ( 10 ),
wherein the improvement comprises: molding or partial drawing the bottom of the body ( 10 ) to form a concave area ( 14 ) having geometrical features correlated to the geometry of the gripping plier prior to said gripping step;
gripping the body ( 10 ) along a limited area ( 12 ) of the side surface comprised between 10.0 and 35.0 mm from the bottom; and
deforming the side surface of the body ( 10 ) along an extensive area ( 18 ) developing from an area adjacent or close to the gripped part ( 12 ).
2. The process according to claim 1 , wherein the plier gripping area of the side surface of the body ( 10 ) from the bottom is comprised between 15.0 and 30.00 mm.
3. The process according to claim 1 , wherein the plier gripping area of the side surface of the body ( 10 ) from the bottom is comprised between 16.0 and 25.0 mm.
4. The process according to claim 1 , wherein the extensive deformation area ( 18 ) of the side surface of the body ( 10 ) develops from the area adjacent to the area ( 12 ) held by the gripping means or plier and reaches or approaches to the an upper area ( 16 ) of the body to be tapered.
5. The process according to claim 1 , wherein the molding or partial drawing ( 14 ) of the bottom of the body ( 10 ) is carried out at or near machine edge.
6. The process according claim 1 , wherein the molding or partial drawing of the bottom of the body ( 10 ) is carried out on the loading drum of the machine.
7. The process according to claim 1 , wherein the concave area of the bottom of the body is stabilized to achieve an accurate adhesion of the profiles among the body and the relevant gripping pliers by a stabilization means.
8. The process according to claim 7 , wherein the concave area of the bottom of the body is stabilized by an air vacuum.
9. The process according to claim 7 , wherein the concave area of the bottom of the body is stabilized by suction cups.
10. The process according to claim 7 , wherein the concave area of the bottom of the body is stabilized by adhesive pads.
11. The process according to claim 7 , wherein the concave area of the bottom of the body is stabilized by magnetic pads.