The purpose of this research is to design disc
cutter for cutting poly propylene random co-polymer
(PPR) and high density polypropylene (HDP) extrudates.
Analytical methods and software including like Catia
and ANSYS are used to design the tool and analyze the
effect of load on the cutter. In designing the disc Cutter,
using the digital logic method of material selection, the
optimum material, carbon steel 19573 with the least cost,
locally obtainable, manufacturable and with hardness
63.42HRC is selected. The desired optimum combination
of hardness and toughness of the cutter is obtained using
hardening temperature 10200C, tempering temperature
2000C, and tempering time 120min which finally gives a
hardness value of 63.42HRC. The strength and quality of
cut edge are tested by cutting hard plastic PPR pipe with
maximum thickness of 12.9mm. By the same setup of the
cutter used in the factory the prototype disc cutter serves
and its failure rate improves from cutting 150 to 250
PPR pipe pieces which was recognized by the industry.
The research results can be used to design the cutter disk
and fabricate a cutter with enough strength to cut
different thickness of PPR pipes without breakage,
reducing unwanted additional cost.
Keywords : Disc Cutter, Bevel Angle, Tool Stress, Hardness, and Tool Contact Area.