罐头是如何制作的

Here is an inside look at how this modern marvel is made:

• 杯料冲裁及拉深 - Press punches out hundreds of cups per minute from huge coils of aluminum or steel
• 熨烫和熨烫 - Cup is forced through a series of rings to iron out cans to full length and form bottom dome.
• 修剪 - Cans are spun as cutting tool trims to length.
• 清洁 - Washer cycles hundreds of cans per minute through multiple cleaning stations.
• 印刷和清漆 - At printing station, cans are rolled against cylinder to print up to four colors simultaneously.
• 底涂漆 - Cans are conveyed past applicator that varnishes bottom.
• 烘焙 - Cans wind through conveying system in oven to dry and set lithography.
• 在喷涂 - A protective specially compounded coating is applied to inside of cans.
• 烘焙 - Trip through funnel oven bakes and cures inside coating.
• 柱头在 - Can necks are reduced at top to fit the designated end size.
• 翻边和测试 - Can rims are flanged for future double seaming of ends. Then, each can is mechanically tested for leakage. Finally, cans are automatically stacked in cartons or on pallets for shipment.

来源: http://www.cancentral.com/can-stats/how-cans-are-made

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