| 摘要 |
The method comprises using a first pressing process including loading an Al alloy sheet on the cylindrical mould, and using the punch for pressing and drawing the sheet to form a cylindrical body with bottom. A second pressing process includes covering the cylindrical body obtained from the first pressing process on the mould which has a dia. smaller than the mould. The punch with appropriate specification presses and draws the cylindrical body to obtain a slender cylindrical body. A drawing process shapes the cylindrical body into the container with correct specified dia.. A necking process comprises heating the opening of the container to an appropriate processing temp. and tightly contacting the outer circumference of the container to driving rollers to reduce the dia. of the opening of container a process of forming a thread section on the neck section of the container for thread-connection with the valve.
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