Machinery’s Handbook, 31st Edition
2944
Index
P lastics
( continued )
P lastics
( continued )
polyurethanes (PUR) 586 press fits 581 processing thermosets 586 proportional limit 565 prototypes 601, 611 radii 594 reinforced 587 relaxation 571–572 resins 556 sawing, speeds and numbers of teeth 604 secant modulus 565 semi-crystalline 556–557 shear modulus G 568 shear stress 566–567 sheet thermoforming 584 shrinkage 559 snap-fit 595–596 specific gravity 387, 559 sprue 587 stiffness 582 strain 563–569 normal 564 shear 566–568 true 569 stress 563–569 normal 564 shear 566–568 thermal 582 true 569 stresses and deflections 592–594 stress relaxation 571–572 stress-strain curve 564–565, 569, 575 structural analysis 578–582
gearing 606–609
accuracy 609 backlash 609 service factors 608 tooth form factors 608
hardness 387, 560 haze 559 heat dissipation factor 577
heterogeneous 560 homogeneous 560 homopolymers 557
Hooke’s law 559, 564 impact resistance 594 inhomogeneous 560 injection molding 587–588, 594–595 mold design 588–592 isotropy 560–561 Izod impact 387, 421–422 Izod test 560 liquid-crystalline polymers (LCP) 557 load-bearing 592–594 machining 601–606 cutting off 602 drilling 602–603, 604
milling 605 molded 604 sawing 604 tapping 604 thermoset cast 604 threading 604 turning 602, 605, 606
manufacturing 583–611 additive 611–615 material 555, 556 elastomers 556 rubbers 556
failure criteria 580 pressure vessels 580 safety factors 580
structures 556–557 temperature index 574 tensile impact 572 tensile modulus 387 thermal properties 572–575 thermal stresses 582 thermoplastics 556–557 thermosets 556 toughness 560 transparency 559 ultimate strength 565 undercuts 594 Vicat softening point 574 viscoelastic 561–562 wall thickness 589–592 water absorption 559 welding 598–600 dielectric 599 electromagnetic 599 hot gas 599
thermoplastics 556–557 thermosets 556
maximum temperature 387 mechanical fasteners 595 mechanical properties 578
effect of temperature on 575–576 time-related 570–572
milling 605 mixtures 556 modulus of elasticity 559, 564 mold flow 594–595 non-Newtonian 595 normal strain 564 notch sensitivity 560 open cell 558 parison 584–585 physical properties 558–563 pipe threads 581
plasticity 559–560 polishing 609–610
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