Invention Grant
- Patent Title: Methods of pressure forming metal containers and the like from preforms having wall thickness gradient
- Patent Title (中): 从具有壁厚梯度的预制件形成金属容器等的方法
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Application No.: US12930557Application Date: 2011-01-10
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Publication No.: US08683837B2Publication Date: 2014-04-01
- Inventor: Robert Mallory , Yihai Shi
- Applicant: Robert Mallory , Yihai Shi
- Applicant Address: US GA Atlanta CA Ontario
- Assignee: Novelis Inc.,Montebello Packaging, a division of Great Pacific Enterprises, L.P.
- Current Assignee: Novelis Inc.,Montebello Packaging, a division of Great Pacific Enterprises, L.P.
- Current Assignee Address: US GA Atlanta CA Ontario
- Agency: Kilpartick Townsend & Stockton LLP
- Main IPC: B21D39/08
- IPC: B21D39/08 ; B21D51/12
Abstract:
A method of forming a bottle-shaped or other contoured metal container by providing a hollow metal preform having a closed end and a wall thickness that decreases progressively in a direction away from the closed end, and subjecting the preform to internal fluid pressure to cause the preform to expand against the wall of a die cavity defining the desired container shape. The method may be employed in pressure-ram-forming procedures wherein a punch is advanced by means of a backing ram into the die cavity to displace and deform the closed end of the preform.
Public/Granted literature
- US20110167886A1 Methods of pressure forming metal containers and the like from preforms having wall thickness gradient Public/Granted day:2011-07-14
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