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US 4,268,557 AGranted
Process and mold for producing padded seat backs, and the product obtained
OwnerRoberto Bracescoinventor
Life of this patent
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OwnerRoberto Bracescoinventor
Estimating the term…
A process and mold for producing padded motor vehicle seat backs containing a metal framework surrounded by polyurethane foam in a plastic coating. The framework is inserted through a slit in the coating which is then sealed. Then the polyurethane foam is injected through a flexible filler neck into the coating and allowed to polymerize. After polymerization the filler neck is cut off. The framework may be contained in a plastic bag together with a relatively resilient foamed plastic body. The coating may be pressurized inwardly and pressure in the mold may be reduced during injection of the polyurethane foam. The mold comprises a pair of lateral mold parts and a central mold part together defining the mold cavity. The lateral mold parts are movable toward and away from the central mold part by hydraulic or pneumatic rams.
A process for producing the padded back portion of a motor vehicle seat having a framework with positioning means incorporated therein, comprising the steps of forming a covering of fluid-tight material having a slit extending over a length at least as great as the smallest width of the framework and a hole provided with a filler nozzle, inserting the framework through said slit into the covering, sealing the slit, placing the covering into a mold having the desired shape of the padded part to be produced, closing the mold, injecting polyurethane foam through the filler nozzle into the covering until the latter is completely filled, permitting the polyurethane foam to polymerize so that said framework is completely embedded in said polyurethane foam, and extracting the padded back part from the mold.
A mold for producing the padded back portion of a motor vehicle seat, comprising a central mold having recesses corresponding to positioning means on the framework and a pair of lateral mold parts with the central mold part rigidly mounted on a base and the lateral mold parts slidably mounted on guide bars supported by said base, said lateral mold parts being arranged to be opened and closed by ram means firmly connected to said base.
Dependencies are inferred from the claim text.