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US 4,786,456 AGranted
Shaping mold
AssigneeMaschinen Witte KG
InventorKarl H. Witte
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AssigneeMaschinen Witte KG
InventorKarl H. Witte
Estimating the term…
A mold for synthetic resin products which are to be shaped while soft, includes a pair of elongated mold parts each having opposed complementary faces with contours at least partially conforming to at least parts of the product to be shaped. A support means on which the mold parts are mounted provide for moving at least one of the mold parts relative to the other mold part to effect removal therefrom of a finished product. The mold parts are constructed and arranged so as to be bendable along their longitudinal axes to effect a change in arcuate configuration, the mold parts being made of a material which facilitates sliding of the synthetic resin product through the mold, the support means supporting the mold parts in fixed spaced apart disposition as the product is moved longitudinally between the mold parts to thereby impart to the product an arcuate configuration corresponding to the arcuate configuration of the mold parts.
A method for changing the elongate shape of an elongated softened plastic product of a complex cross-sectioned shape and having an elongate length with an initial elongate shape, comprising the steps of bending two elongated complementary and bendable mold parts into a desired elongate arcuate configuration corresponding to the desired elongate arcuate configuration of said product, said desired elongate arcuate configuration being different from said initial elongate shape, fixedly mounting said bent mold parts on a mold plate means, moving said softened plastic product longitudinally through said fixedly mounted mold parts as the latter slidingly engages said softened plastic product, slight stretching said softened plastic product during said moving step, and changing the elongate shape of said product from said initial elongate shape to said desired elongate arcuate configuration corresponding to the arcuate configuration of said mold parts as said softened plastic product slidably engages said mold parts upon being moved longitudinally through said fixedly mounted mold parts.
A method for changing the elongate shape of an elongated softened product having a complex cross-sectional configuration and having an elongated length with an initial elongate shape comprising the steps of disposing two elongated complementary mold parts along an elongate arcuate path corresponding to the desired elongate curvilinear shape of said product, said desired elongate curvilinear shape being different from said initial elongate shape, fixedly mounting said bent mold parts on a mounting plate means, pulling said softened plastic product longitudinally through said fixedly mounted mold parts as the latter slidingly engages said softened plastic product, slightly stretching said softened plastic product during said pulling step, and changing the elongate shape of said product from said initial elongate shape to said desired elongate curvilinear shape corresponding to the arcuate configuration of said mold parts by said pulling step as said softened plastic product slidably engages said mold parts upon being pulled longitudinally through said fixedly mounted mold parts.
Dependencies are inferred from the claim text.