Aerosol can fabrication process
An aerosol can fabrication process comprises the following steps: formation of slugs from an aluminium-based alloy having the following composition, in weight percentage: Si 0.35-0.45 Mg 0.25-0.40 Mn 0.05-0.15 Fe 0.12-0.20 Total of minor elements ≦0.15% Al Balance. thermal treatment of the slugs, forced cooling of the slugs, cold impact extrusion of a slug so as to form a can, applying a lacquer inside the can.
1. An aerosol can fabrication process comprising at least the following steps:
formation of slugs from an aluminium-based alloy having the following composition, in weight percentage:
Si
0.35-0.45
Mg
0.25-0.40
Mn
0.05-0.15
Fe
0.12-0.20
Total of minor elements
≦0.15%
Al
98.65-99.23,
thermal treatment of the slugs,
forced cooling of the slugs,
cold impact extrusion of a slug so as to form a can,
applying a lacquer inside the can.
2. The process according to claim 1 , wherein the aluminium-based alloy comprises, in weight percentage:
Si
0.40-0.45
Mg
0.30-0.35
Mn
0.08-0.12
Fe
0.12-0.20
Total of minor elements
≦0.15%
Al
98.73-99.10.
3. The process according to claim 1 , wherein forced cooling of the slugs is performed by forced air.
4. The process according to claim 1 , wherein forced cooling of the slugs is performed by immersion in water.
5. The process according to claim 1 , wherein the formation step of the slugs comprises formation of a strip of aluminium-based alloy by continuous casting, the strip then being hot then cold rolled before being cut into the form of slugs having a predetermined diameter.
6. The process according to claim 1 , wherein the application step of the lacquer is achieved by spraying followed by polymerization performed at a temperature comprised between 200° C. and 250° C. for a period of time of less than 10 minutes.
7. An aerosol can fabrication process comprising at least the following steps:
formation of slugs from an aluminium-based alloy having the following composition, in weight percentage:
Si
0.35-0.45
Mg
0.25-0.40
Mn
0.05-0.15
Fe
0.12-0.20
Total of minor elements
≦0.15%
Al
98.65-99.23,
thermal treatment of the slugs,
forced cooling of the slugs,
cold impact extrusion of a slug so as to form a can,
applying a lacquer inside the can
wherein, during the forced cooling step, the temperature of the slugs is reduced exponentially by about 400° C. in two and a half hours.
8. An aerosol can fabrication process comprising at least the following steps:
formation of slugs from an aluminium-based alloy having the following composition, in weight percentage:
Si
0.35-0.45
Mg
0.25-0.40
Mn
0.05-0.15
Fe
0.12-0.20
Total of minor elements
≦0.15%
Al
98.65-99.23,
thermal treatment of the slugs,
forced cooling of the slugs,
cold impact extrusion of a slug so as to form a can,
applying a lacquer inside the can
wherein thermal treatment of the slugs is performed at a temperature comprised between 465° C. and 490° C. for a time comprised between 4 hours and 5 hours.