Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Molding pressure control means responsive to pressure at...
Patent
1989-05-26
1991-08-13
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Molding pressure control means responsive to pressure at...
264 405, 264120, 425150, 425157, 425167, 425170, 425419, 425420, 100 48, B29C 4358, B30B 1516
Patent
active
050392948
ABSTRACT:
An adjustable powder compacting device for compacting a powder such as a cosmetic powder includes a control unit which electrically monitors and controls a hydraulic ram operated punch to compress the powder into a cup. The control unit causes the punch to perform: an approach stroke with a first regulated preset punch speed until the punch contacts the powder and exerts a first pressure on it, a debubbling stroke with a regulated second preset punch speed until the pressure exerted by the punch reaches a second preset pressure, and a compacting stroke at a constant third preset pressure for a preset period of time. These preset speeds and pressures are easily adjusted so that proper evacuation of gases from the powder and optimal compacting is readily achievable when the consistency of the powder changes. In specific embodiments, the device includes a rotatable disc for causing successive volumes of non-compressed powder to be compressed by the punch. In other embodiments, the device includes a plotting board for displaying the operation of the device such as the speed and pressure of the punch.
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Patent Abstracts of Japan, vol. 10, No. 383 (C-393) [2440], Dec. 23, 1986 & JP-S-61 176 515.
Crepet Jean-Pierre
Gautier Jean
"L'Oreal"
Mackey James P.
Woo Jay H.
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