Hello Zeal,

This method of accelearting the cure time of cold cure cements and of applying pressure has been supported by the companies that supply the cold cure materials (Rema, Pang, etc.).

The method works well and definately provideds a better cold cure splice than the traditional hand pressure and ambient temperature cure method. The downside is that you are introducing the negative aspect hot vulcanizing (i.e. equipment requirement and handling) to the cold cure equation without getting a splice that is as dependably strong as the hot splice.

Personally, I prefer the method you use over the standard cold cure splice technique as it reduces the potential for a splice failure and lets the operator get his conveyor back in production quicker.

Regards, ■

Hello Zeal,

Yes, a properly constructed hot splice would last.

A cold cure splice is likely to fail under these conditions.

Regards, ■

Hi Zeal

I’ve heard of this “Warm Splicing” practice but have not seen or used it.

Considering you would use the same equipment as hot splicing and only save on the cool down time, could you tell me why you use this method over hot splicing? ■

Hello Wahid Hamza,

I'm very surprised that you can get six months of use from a cold cure splice where you have immediately loaded it and only allowed a one-hour cure time. This suggests that your belt tension is extremely low and that you have little belt flex in your system. It also suggests that you are getting good pressure on the joint during your lay-up process.

If you wish to increase the belt splice life, do not load the splice until the cement set time is over and allow more set-time (12 hours to 24 hours) before the belt is put back into service. You will not need a press under these conditions. If you wish to accelerate the time requirement, you can add heat and pressure (i.e. use a low temperature / low pressure press), or do a hot spice instead of a cold cure one.

Regards, ■

I agree with my collegues that the best join will be done hot with a conventional vulcanizing press like the recommendation of the belt manufacturers.

On the other hand the vulcanizing equipment is very expensive and need good skilled people. In many countries it is difficult to make a hot splice because of the bad conditions (weather, dust) or because of the distance (sending a press is expensive, unvulcanized rubber must be available etc.). That's why cold splicing was developed as a cheap alternative method.

This method is also not perfect. In order to eliminate some risks and to shorten the needed waiting time some manufacturers like Tip Top have developed a hot gleing method with a very light presses (half weight, half cost). The temperature and the pressure is lower. But this method is also a compromise and don't meet all needed requirements:

- Quick installation

- Installation without need of physical strength

- Indepedant of the conditions of installation (wet, dusty)

- No need/use of expensive and heavy equipment

- No need of highly skilled operators

- High tensile strength (static and dynamic)

- No deteroration of physical property (i.e. Elasticity)

- Compatible with usual conveyor scrapers

- Life time as long as the belt

- Warning of mechanical deterioration

- Economical

- etc

Personally I will suggest to have a look on the Super-Screw fasteners from our company which is the newest and most promising development in this area:

- High elastic multiply textile carcass

- Rubber as cover material

- Metal inserts under the rubber

- Self tapping screws for fixing the fastener on the belt

Edgar Jakob

MLT GmbH

www.mlt-deutschland.com ■

hi I am glad coming here.

we are a company that reclaim used conveyor belts .so i wonder anyone has some.if you do please contact us.we will appreciate you .if you have large quantity and for long term we may set up a relationship of a bussiness partner.

pls contact to :

Ming Yu

Phone: 86-571-86983555

Fax: 86-571-86725215

e-mail:Thmec@conveyorbelt.com.cn

website: www.conveyorbelt.com.cn

Add: NO. 661, Hanghai Road , Hangzhou , China ■