Processing Fiber-Reinforced Polymers: Specific Wear Phenomena Caused by Filler Materials

Andreas Blutmager, Thomas Spahn, Markus Varga, Walter Friesenbichler, Helmut Riedl, Paul Heinz Mayrhofer

    Publikation: Beitrag in FachzeitschriftArtikelForschung

    3 Zitate (Scopus)


    Fiber-reinforced polymers allow for the implementation of
    plastic materials in structural components. However,
    increasing incorporation of fibers up to 50 wt% causes
    accelerated component wear in injection molding
    machines. In particular, the barrel and screw in the compression
    zone suffer from increased wear. The abrasive
    fibers of the compacted polymer pellets in the solid bed
    protrude from the surfaces of the resin having an abrasive,
    brush-like behavior. A modified pin-on-disk testing system
    with specially designed polymer pins was used to emulate
    the described tribological system in laboratory scale.
    Through varying contact pressure, temperature, and surface
    modifications of the counterparts (blank or coated
    powder-metallurgical steel), abrasive wear as observed in
    industrial-sized extruder screws could be successfully simulated
    on a laboratory-scale testing system. Detailed investigations
    of the pins and disks highlighted that the glass fibers
    plow and cut the surface leading to abrasion as observed in
    the real field application. Temperature has been proven to be
    the most decisive driving force. Surface modifications such
    as protective physical vapor-deposited CrN coatings are
    effective against abrasive wear, clearly outperforming
    untreated steels. The presented pin-on-disk-test setup will
    improve screening of materials for extruders, thus enhancing
    the durability of injection molding machines.
    Seiten (von - bis)78-85
    FachzeitschriftPolymer engineering and science
    PublikationsstatusVeröffentlicht - 18 Okt. 2019

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