How a two-piece drawn and wall-ironed food can is made
二片金屬沖拔罐的制造
1. Aluminium or steel strip arrives at the can manufacturing plant in large coils.鋁或鋼板以大卷的形式運到制罐廠(chǎng)
2. The strip is lubricated with a thin film of liquid and then fed continuously through a cupping press, which blanks and draws thousands of shallow cups every minute. 金屬片經(jīng)過(guò)一層薄薄的液體膜潤滑然后進(jìn)入連續沖拔機，每分鐘沖拔出數千只金屬淺杯
3. Each cup is rammed through a series of tungsten carbide rings. This is the drawing and ironing process which redraws the cup to a smaller diameter and thins the walls, whilst increasing the height. 每只杯再經(jīng)過(guò)一系列碳化鎢環(huán)的沖壓。這是拉伸和碾平杯壁的過(guò)程，以形成更細的直徑、更薄的壁和增加罐子的高度
4. Trimmers remove the surplus irregular edge and cut each can to a precise specified height. The surplus material is recycled.整理機去除多余的飛邊，并把杯子精確地切成要求的高度，多余的材料被回收
5. The trimmed can bodies are passed through highly efficient washers and then dried. This removes all traces of lubricant in preparation for coating internally and externally.
整理過(guò)的罐身經(jīng)過(guò)高速清洗機并干燥。這一步驟是為了去掉潤滑液殘留為內外涂層做準備
6. The cans are coated externally by passing them under a waterfall of clear lacquer which protects the surface against corrosion.罐子通過(guò)一個(gè)瀑布似的清漆噴霧進(jìn)行外涂層，以達到防銹的目的
7. Lacquered external surfaces are dried in an oven罐外的漆膜通過(guò)烘箱干燥
8. The cans are passed through a flanger, where the tops of the cans are flanged outwards to accept the ends after the cans have been filled.罐子通過(guò)一個(gè)刮板形成頂部折邊，以便罐裝后與罐底封合
9. The cans are passed through a beader, where the walls of the cans have circumferential beads formed in them to give added strength.
罐子通過(guò)卷邊器在罐壁上加筋以加強罐體的強度
10. Every can is tested at each stage of manufacture. At the final stage they pass through a light tester which automatically rejects any cans with pinholes or fractures. 每個(gè)罐子都經(jīng)過(guò)制造高的檢測。最后罐子通過(guò)一個(gè)光學(xué)檢測器可以自動(dòng)剔除有針孔或爆裂的罐子
11. The inside of each can is sprayed with lacquer.
This special lacquer is to protect the can itself from corrosion and from any possibility of interaction between the contents and the metal.
每個(gè)罐子的內部都噴一種清漆。這種特殊的涂層是為了防銹以及防止內容物對金屬材料的腐蝕
12. Lacquered internal surfaces are dried in an oven. 內層漆膜通過(guò)一個(gè)烘道干燥
13. The finished can bodies are then transferred to the warehouse to be automatically palletised before despatch to the filling plant.完成的罐身運到倉庫并自動(dòng)碼垛等待送入灌裝
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