THE MEGADYNE GROUP

Conveyor Beltsfor Aluminum Extrusion

POWERING GLOBAL INDUSTRY

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Aluminum Extrusion LineStandard layout of an aluminum extrusion production line.

Aluminum Extrusion Process

After being extruded the profile falls into rollers that convey it further down the line. The first rollers have to hold the most amount of heat, so we use PBO; then we use Kevlar rollers as the profile cools down.

The profile goes to a cooling table where it moves back and forth to cool down. We normally use Kevlar for this table.

If there are 2 or 3 cooling tables, as the profile gets colder we can start using less costly materials like Nomex or polyester.

Normally at the end of the process there is a saw that cuts the profile. Here it is much cooler so we can use polyester.

An aluminum billet gets heated up and then pressed through a die to give it the desired shape.

InitialArea

First Cooling Table

Second Cooling Table

Sizing Table

Pickup Table

1050˚F

850˚F

580˚F

300˚F

750˚F

850˚F

Extruder

Extruder

PBOPBO stands for Polybenzobisoxazole, which is a synthetic polymer that was invented by

SRI International and is currently manufactured by Toyobo Corporation in Japan. The

trademark name for PBO is Zylon. Zylon is 1.6 times stronger than Kevlar and can also

withstand higher temperatures.

For aluminum extrusion, PBO normally can withstand temperatures up to 1200˚F / 600˚C.

KEVLARKevlar is the trademark name for an aramid fiber made by DuPont. An aramid fiber is a

synthetic (man-made) fiber that is very strong and heat resistant. Aramids are generally

prepared by the reaction between an amine group and a carboxylic acid halide group.

The most popular aramid fibers are: Kevlar, Twaron, Technora and Heracron. The one that

we and most of the market use is Kevlar. Kevlar is made by a solution of monomers 1,4

phenylene-diamine and terepththaloyl chloride in a condensation reaction.

For aluminum extrusion, Kevlar normally can withstand temperatures up to 950˚F / 500˚C.

NOMEXNomex is the trademark for a flame-resistant meta-aramid developed by DuPont. Nomex,

like Kevlar is an aramid but Nomex is a “meta” aramid, and Kevlar is a “para” aramid. The

variant “meta” just has a di�erent location for the di�erent compounds than the variant

“para”. This makes Nomex have an good thermal, chemical and radiation resistance for a

polymer material. For example the firefighters suits are made of Nomex because of its

resistance to fire and chemicals… But this also makes Nomex to have a poorer strength and

a lower resistance to heat than Kevlar. Nomex is made in USA and also Spain by Dupont.

For the aluminum extrusion process it can withstand 450˚F / 230˚C.

POLYESTERPolyester is a synthetic polymer made of purified terephthalic acid (PTA) or its dimethyl

esterdimethyl terephthalate (DMT) and monoethylene glycol. It doesn’t have high resistant to

heat, that is why is normally used at the very end of the process where the profile is cooler.

For the aluminum extrusion process it can withstand 300˚F / 150˚C.

Belting Materials UsedDi�erent synthetic fibers used for aluminum extrusion.

Material PBO + Kevlar Kevlar Polyester

Inner Diameter 40mm to 140mm 40mm to 140mm 40mm to 140mm

Length <1200mm <1200mm <1200mm

Thickness 5mm to 14mm 5mm to 14mm 5mm to 14mm

Working 1200˚F | 600˚C 950˚F | 500˚C 300˚F | 150˚C

Temperature

Additional Hard Type Available Hard Type Available Hard Type Available

PBO KEVLAR POLYESTER

Needled Rollers

Needled Pads

Material PBO + Kevlar Kevlar Nomex Polyester

Width 50mm to 3,000mm 50mm to 3,000mm 50mm to 3,000mm 50mm to 3,000mm

Length Per Customer Request Per Customer Request Per Customer Request Per Customer Request

Thickness 5mm to 14mm 5mm to 14mm 5mm to 14mm 5mm to 14mm

Working 1200˚F | 600˚C 950˚F | 500˚C 450˚F | 230˚C 300˚F | 150˚C

Temperature

Additional Adhesive Backing & Adhesive Backing & Adhesive Backing & Adhesive Backing & Hard Type Available Hard Type Available Hard Type Available Hard Type Available

PBO KEVLAR NOMEX POLYESTER

Material NOVA NOVA NOVA

Thickness 2mm 4mm 5.5mm

Max. Width 2,000mm 2,000mm 2,000mm

Working 248˚F | 120˚C 248˚F | 120˚C 248˚F | 120˚C

Temperature

Color Green, Black, White Green, Black, White Green, Black, White

NOVA 25 NOVA 40 NOVA 60

NOVA - Needled Polyester + Rubber Impregnated

Material PBO + Kevlar Kevlar Nomex Polyester

Width <3,000mm <3,000mm <3,000mm <3,000mm

Length <30,000mm <30,000mm <30,000mm <30,000mm

Thickness 5mm to 14mm 5mm to 14mm 5mm to 14mm 5mm to 14mm

Working 1200˚F | 600˚C 950˚F | 500˚C 450˚F | 230˚C 300˚F | 150˚C

Temperature

Additional Truly Endless & Laced. Truly Endless & Laced. Truly Endless & Laced. Truly Endless & Laced. Hard Type Available Hard Type Available Hard Type Available Hard Type Available

PBO KEVLAR NOMEX POLYESTER

Needled Belts

Woven Products

Material Nomex Nomex Nomex

Size Per Customer Request Per Customer Request Per Customer Request

Thickness 2mm 2mm to 10mm

Density 450 g/m2 N/A

Working 450˚F | 230˚C 450˚F | 230˚C 450˚F | 230˚C

Temperature

SPACER BARS & AGING FURNACE CRATES

NOMEX CRADLE LINER STRIPS

PROTECTIVE COVERING

Spacer Bars and Aging Furnace Crates

K-7 K-24K-7 K-24 K-26K-26

MATERIAL DESCRIPTION THICKNESS TEMPERATURE

K-7 4-Ply woven Kevlar w/wire construction to 5mm 950˚F | 500˚C help dissipate heat & lower the elongation.

K-24 4-Ply woven Kevlar. 5mm 950˚F | 500˚C

K-26 4-Ply woven Kevlar with pan fibers 5mm 950˚F | 500˚C to help dissipate heat.

Special FabricationWe love challenges. Test us!

Truly Endless Kevlar Cover on a Timing Belt

Kevlar on a Reinforced Base

V-Guides: PVC and Kevlar Ropeand NOVA with PVC Guide

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Across the pond:

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Call our customer service now with your problem application.

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