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US 4,065,244 AGranted
Apparatus for molding polymeric materials
AssigneeThe Alan I W Frank Corporation
InventorAlan I W Frank
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AssigneeThe Alan I W Frank Corporation
InventorAlan I W Frank
Estimating the term…
A process of molding polymeric material comprising causing heated polymeric material to flow in a predetermined direction in a mold and cooling the polymeric material forming a product exhibiting anisotropic properties including greater stiffness in the direction of flow than in any other direction. Also molding apparatus comprising two mold parts each having a mold cavity, the molding apparatus being so constructed and arranged that communication between the two mold cavities may be established and disestablished at will, means for admitting material to be molded into one of the mold cavities and by pressure differential causing flow of some of the material from said mold cavity into the other mold cavity when communication between the mold cavities is established, and means for cooling the flowing material whereby a product exhibiting anisotropic properties including greater stiffness in the direction of flow than in any other direction may be formed.
A molding apparatus comprising first and second mold cavities adapted for communication with each other to define a product to be molded, said first mold cavity formed by a pair of mold sections, at least one of said sections being movable with respect to said other section for increasing or decreasing the volume of said first mold cavity whereby decreasing said volume substantially defines that portion of the product to be molded in said first mold cavity, means for moving at least one of said sections operably connected thereto, and means for admitting material to be molded into said first mold cavity;
Dependencies are inferred from the claim text.