Processing Fiber-Reinforced Polymers: Specific Wear Phenomena Caused by Filler Materials
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In: Polymer engineering and science, Vol. 60.2020, No. 1, 18.10.2019, p. 78-85.
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TY - JOUR
T1 - Processing Fiber-Reinforced Polymers: Specific Wear Phenomena Caused by Filler Materials
AU - Blutmager, Andreas
AU - Spahn, Thomas
AU - Varga, Markus
AU - Friesenbichler, Walter
AU - Riedl, Helmut
AU - Mayrhofer, Paul Heinz
PY - 2019/10/18
Y1 - 2019/10/18
N2 - Fiber-reinforced polymers allow for the implementation ofplastic materials in structural components. However,increasing incorporation of fibers up to 50 wt% causesaccelerated component wear in injection moldingmachines. In particular, the barrel and screw in the compressionzone suffer from increased wear. The abrasivefibers of the compacted polymer pellets in the solid bedprotrude from the surfaces of the resin having an abrasive,brush-like behavior. A modified pin-on-disk testing systemwith specially designed polymer pins was used to emulatethe described tribological system in laboratory scale.Through varying contact pressure, temperature, and surfacemodifications of the counterparts (blank or coatedpowder-metallurgical steel), abrasive wear as observed inindustrial-sized extruder screws could be successfully simulatedon a laboratory-scale testing system. Detailed investigationsof the pins and disks highlighted that the glass fibersplow and cut the surface leading to abrasion as observed inthe real field application. Temperature has been proven to bethe most decisive driving force. Surface modifications suchas protective physical vapor-deposited CrN coatings areeffective against abrasive wear, clearly outperforminguntreated steels. The presented pin-on-disk-test setup willimprove screening of materials for extruders, thus enhancingthe durability of injection molding machines.
AB - Fiber-reinforced polymers allow for the implementation ofplastic materials in structural components. However,increasing incorporation of fibers up to 50 wt% causesaccelerated component wear in injection moldingmachines. In particular, the barrel and screw in the compressionzone suffer from increased wear. The abrasivefibers of the compacted polymer pellets in the solid bedprotrude from the surfaces of the resin having an abrasive,brush-like behavior. A modified pin-on-disk testing systemwith specially designed polymer pins was used to emulatethe described tribological system in laboratory scale.Through varying contact pressure, temperature, and surfacemodifications of the counterparts (blank or coatedpowder-metallurgical steel), abrasive wear as observed inindustrial-sized extruder screws could be successfully simulatedon a laboratory-scale testing system. Detailed investigationsof the pins and disks highlighted that the glass fibersplow and cut the surface leading to abrasion as observed inthe real field application. Temperature has been proven to bethe most decisive driving force. Surface modifications suchas protective physical vapor-deposited CrN coatings areeffective against abrasive wear, clearly outperforminguntreated steels. The presented pin-on-disk-test setup willimprove screening of materials for extruders, thus enhancingthe durability of injection molding machines.
U2 - 10.1002/pen.25261
DO - 10.1002/pen.25261
M3 - Article
VL - 60.2020
SP - 78
EP - 85
JO - Polymer engineering and science
JF - Polymer engineering and science
SN - 1548-2634
IS - 1
ER -