Forming method and apparatus and an associated preform...

Details Forming method and apparatus and an associated preform... Forming method and apparatus and an associated preform...

2011-03-15

2011-03-15

Jones, David B (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

Using fixed die

C072S054000, C072S056000, C029S421100, C219S634000

Reexamination Certificate

active

07905128

ABSTRACT:
A method and apparatus for forming a workpiece having a desired configuration as well as an associated preform assembly are provided. The forming method and apparatus as well as the preform assembly include a hydrostatic pressing medium, such as a layer of glass, disposed within the die cavity proximate to at least one side of the workpiece. The hydrostatic pressing medium is configured to have a relatively low viscosity at the temperatures at which the workpiece is processed, thereby facilitating the relatively even application of pressure to the workpiece. As such, a workpiece having a complex configuration may be formed utilizing a single acting die.

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PCT/US2009/051562 International Search Report, mailed Sep. 29, 2009.
PCT/US2009/051562 Written Opinion, mailed Sep. 29, 2009.

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