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Vacuum processes for the Canning industry
The manufacturing process of aluminium cans for the beverage industry is strongly dependent on vacuum. Aluminium cans are non-magnetic, so vacuum becomes the most practical way to hold them. All through the process, when the can is formed, transported and painted, vacuum is at work.
Blanking and Deep-drawing
Wall-ironing and end forming
Trimming : In the trimming machine, the can is held by a vacuum plate, set in rotation and then moved axially until it reaches the required trimming height. Then the movable cutter unit is guided to the can. Whilst the can rotates precisely once, the can rim between the upper and lower cutter is cut off burr-free at the required height. The rings cut off are removed by vacuum, pressed into bales and returned to the tin plate production facility ➡ vacuum holding and conveying
Washing and drying
Outside coating: The cans are coated on the outside as protection against corrosion and in order to apply a decorative design. The cans are spaced by an intake wheel and drawn on to the coating mandrel of the mandrel wheel by means of a vacuum. They are then set in rotation around their own axis by the rotation belt. The coating film on the coater cylinder is then transferred to the cans positioned on the rotating coating mandrels ➡ vacuumpick & place
Printing: The can is positioned on the mandrel rolls synchronously over the blanket and absorbs the complete decorative design with all the ink colors from it. ➡ vacuum pick & place
Internal coating: Inside the internal coating machine, the can is conveyed to a coating turret and positioned on a vacuum plate. It is set into rotation and passes two spray guns, the first one which coats the lower section of the body and the second the body and the base. ➡ vacuum pick & place
Necking: The diameter of the can which is still cylindrical needs to be reduced in the upper section to accommodate the smaller end.
End coating: The metallic bright can end is coated from the outside in the end coating machine ➡ vacuumpick & place
Testing for holes, flange cracks and for internal defects.
That means canning line have high throughputs and require high-capacity vacuum pumps, while major problems present on site are high maintenance costs, up time of the plant as well as high metal sheet rejection rates
Operating vacuum level for the application: 200-400mbar(a)
Pumping speed : from 1200 to 3000 m3/h
Control the maintenance costs
And Atlas Copco VSD⁺ pumps are up for the task.
A range of solutions and technologies relaying on best in class design for high reliability and easy maintenance coupled with intelligent control.
The next big step in Liquid Ring technology the LRP 700-1000 VSD⁺ series perfectly suited to wet, humid and dirty applications with high temperatures, extreme vapor loads and even liquid and solid carryover from the process.
Essentra uses our new GHS 900 VSD+ vacuum pump. This machine is based on proven technology. Essentra has no less than 40 production lines. Atlas Copco's centralized vacuum solution allowed them to realize substantial savings.
Vitra Saves A Whooping 89% Energy by using Atlas Copco's Vacuum Pump Solution!
Vitra shares its experience with Atlas Copco and reveals the energy saving secret. Vitra has a brand new GHS 1600 VSD⁺. This is an oil-injected screw vacuum pump with a variable speed drive.
Eczacibasi is a prominent Turkish industrial group, whose core sectors are building products, healthcare and consumer products. Their Vitra brand is among the world’s top providers of bathroom and tiling solutions. Vitra’s Istanbul factory has the capacity to produce 350,000 bathtubs every year.