SYSTEM AND METHOD FOR IN-SITU IMPREGNATION OF CONTINUOUS FIBER TOWS WITH THERMOPLASTIC RESIN

A method and system for impregnating a source of fiber tow is provided. A stream of fiber tow is drawn through a tow guide to align the fiber tow with a predetermined path. The stream is drawn in tension across a series of tow spreader pins, that include convex spreading surface aligned with the pre...

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Hauptverfasser: GAROFALO, James John, WALCZYK, Daniel F
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WALCZYK, Daniel F
description A method and system for impregnating a source of fiber tow is provided. A stream of fiber tow is drawn through a tow guide to align the fiber tow with a predetermined path. The stream is drawn in tension across a series of tow spreader pins, that include convex spreading surface aligned with the predetermined tow path. As the fiber tow is drawn over spreading surfaces, the fibers tend to spread and/or fan out along that surface. The stream of fiber tow now being spread to a greater width and reduced thickness, the spread fiber tow is drawn through an impregnation die that includes a plurality of resin supply conduits. Resin melt is applied to the spread fiber tow from one or more directions to fully impregnate the fiber tow. The prepreg fiber tow is then drawn to a converging die which removes excess resin and converge to a fiber tow product. An angled drive roller is utilized to pull the fiber tow with sufficient force to overcome dry and viscous friction in the system components.
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A stream of fiber tow is drawn through a tow guide to align the fiber tow with a predetermined path. The stream is drawn in tension across a series of tow spreader pins, that include convex spreading surface aligned with the predetermined tow path. As the fiber tow is drawn over spreading surfaces, the fibers tend to spread and/or fan out along that surface. The stream of fiber tow now being spread to a greater width and reduced thickness, the spread fiber tow is drawn through an impregnation die that includes a plurality of resin supply conduits. Resin melt is applied to the spread fiber tow from one or more directions to fully impregnate the fiber tow. The prepreg fiber tow is then drawn to a converging die which removes excess resin and converge to a fiber tow product. An angled drive roller is utilized to pull the fiber tow with sufficient force to overcome dry and viscous friction in the system components.</abstract><oa>free_for_read</oa></addata></record>
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subjects ADDITIVE MANUFACTURING TECHNOLOGY
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS,ROPES OR THE LIKE
FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
LAUNDERING
MECHANICAL FINISHING OF YARNS OR ROPES
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TEXTILES
TRANSPORTING
TREATMENT OF TEXTILES OR THE LIKE
WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL
WARPING OR BEAMING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
YARNS
title SYSTEM AND METHOD FOR IN-SITU IMPREGNATION OF CONTINUOUS FIBER TOWS WITH THERMOPLASTIC RESIN
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