Paper making and fiber liberation – Processes and products – Article forming processes
Patent
1998-01-15
1999-10-26
Chin, Peter
Paper making and fiber liberation
Processes and products
Article forming processes
162219, 162228, 162382, 162389, 162390, 162399, 425 84, 264 86, D21F 1300, D21J 100, D21J 300
Patent
active
059721693
ABSTRACT:
An efficient, low cost method and apparatus for controlling fiber deposition in a fiber reinforced preform is provided. In the method, a main screen is placed in a tank filled with liquid. The main screen has a major surface, upright side walls and a plurality of openings formed therein. Reinforcing fibers are added to the liquid to create a slurry. The main screen is raised through the slurry to a level beneath the top of the slurry, thereby causing the reinforcing fibers to be deposited on the main screen. A retainer screen is inserted into the slurry so that the reinforcing fibers are sandwiched between the main screen and the retainer screen. Both the main screen and retainer screen are raised out of the tank effectively forming a preform with minimal deformation. An alternative embodiment includes a bubbler zone control device for mixing the slurry. The tank is divided into separate areas or zones whereby the supply of fluid to each bubbler zone is controlled. The bubbler zone controller may be used to initiate or diminish a vortex in the slurry as the screen is being raised out of the tank. Another embodiment includes a fiber dispenser controller for sequentially adding different fibers to the slurry.
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Keown, J. A., and Curtis, R. W., Article of The Cincinnati Milling Maching Co. entitled "Wet Slurry Process brings precision to Reinforced Plastics", p. 22, undated.
Bodary Joseph A.
Greve Bruce N.
Wells Terry G.
Chin Peter
Cronin Kevin
The Budd Company
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