Method and apparatus for solid prototyping

Details Method and apparatus for solid prototyping Method and apparatus for solid prototyping

1995-11-13

1998-06-09

Voeltz, Emanuel T.

Boots, shoes, and leggings

36446826, 36446825, 36447424, 36447301, 36447502, 36447508, 156312, 156350, 15624421, 264 407, 26417111, 26417118, 26421121, 26421123, 26432813, 425145, 425149, 425375, G06F 1900, B29C 4738

Patent

active

057645213

ABSTRACT:
An improved extrusion-based manufacturing system includes one or more extruders, with each extruder containing at least two stages of increasing pressurization. In a preferred embodiment, a first stage of pressurization is created by the motion of a solid wafer of thermoplastic through an orifice into a heater chamber. In another preferred embodiment, the wafers are stored in removable, electronically tagged, cassettes and are removed therefrom by a stapler mechanism which feeds the wafers from the cassette to a tractor feed mechanism on demand. In each embodiment, a second stage of pressurization is provided by a pump, with the first stage pressurization maintaining a flow of thermoplastic to the pump under all expected pump rates.

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