What is causing my Profile Extrusion splice to come apart?

• The heat paddle may have product build-up on it, which causes splice contamination & failure.

• When closing the joiner, too much pressure can cause the molten material to squeeze out thus reducing bond strength.

• Applying too little pressure to the joiner results in decreased flash around the splice and splice failure.

• Decreased voltage due to long extension cords or other electrical problems can result in a lower heat paddle temperature and not reaching the required melt temperature.

Why is the Profile Extrusion splice “necking down”?

• Excessive tension due to high loads can cause the splice area to stretch out.

• Running the belt before the splice has cooled down can cause the splice area to stretch out.

Why does my un-reinforced Polyflex belt continue to stretch?

• Polyflex belting must be pre-tensioned at a minimum of 1 % tension during installation (see pretension guidelines in the Thermoplastic Catalog).

• Your application may require a different Polyflex compound or a reinforced version (consult the factory).

Why is the rubber cover on my SG nylon core belt cracking?

• Excessive heat can cause the rubber cover to crack (see temperature ratings in the Nycor Catalog).

Why is my nylon core cone pulley belt cracking on the edge?

• These cracks are characteristic of edge fatigue and caused by excessive stress from using too wide of a belt. Always use the narrowest belt possible that will deliver the proper HP.

• Also, edge wear can be caused by poor shifters or the belt riding too hard on the shifter.

Why is my conveyor belt mistracking?

• The splice may not be square or aligned.

• The conveyor frame may be out of alignment

• The end pulleys or idlers may not be square.

• Material may be loaded on one side.

Why are my splices breaking?

• The pulleys may be too small. Check the minimum pulley diameters in the appropriate catalog.

• The belt may be overloaded by product, torque or excessive tension.

• Be sure that the splicing instructions are being followed properly and that all the adhesives have not passed their shelf life.