As engineering plastics don’t corrode,
can operate without lubricants and are lightweight, they are
making inroads in mining applications that once were exclusively
made from metals.
Ertalon & Nylatron
The nylon family of engineering thermoplastics
have been extensively used in mining applications because
of the following properties:
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Strength, stiffness, hardness & toughness.
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Fatigue resistance.
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Mechanical & noise dampening.
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Good sliding properties & wear resistance.
Nylatron®703 XL, for example, features
"Zero Slip-Stick" performance for precise and efficient
motion control of machinery components including wear pads,
bearing blocks, wear guides and linear bearings, as well as
providing even lower coefficients of friction.
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Pivot
Bushes |
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and Nylatron families have been successfully employed
as:
- Wear pads on side guides, rollers, conveyors,
presses and telescopic booms.
- Gears on winders, lifts and escalators, and in
drives for processing equipment.
- Bearings or bushes, where the materials have
found extensive uses in earthmoving equipment and
processing machinery.
- Pulleys and sheaves for conveyor components,
boring and bolting equipment, and heavy duty sections
on draglines.
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| Ertalon
Wear Block |
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Draglines themselves are host to a myriad of uses for Ertalon
and Nylatron. Uses on draglines have expanded to encompass:
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Polystone for optimum sliding qualities
Key features and benefits of the material
include:
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Impact strength combined with light weight.
It is easy to handle without special equipment (having a
specific gravity of 0.93).
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Weatherproof – it doesn’t absorb
water.
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Chemically resistant – it resists
corrosive material (such as sulphuric acid and caustic soda).
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Abrasion resistant – rated better
than carbon steel for sliding abrasion applications.
Common uses of Polystone include chain guides
and support profiles, in order to reduce wear & friction,
lower noise and eliminate the requirement for lubricants.
Another important area in which Polystone
is increasingly important is in dump trucks, trailers, hoppers
and bins for flow promotion where common problems include
product sticking, rat-holing and generally clogging processes
that require a smooth flow of material.
Today's dump truck liners have evolved considerably
with the availability of new sheet sizes, special grades and
improved fastening systems, all resulting in a high return
on investment.
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Mass
Flow Efficiency |
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