How severe is the bow? If the belt can clear the discs which form the vertical curve try running the empty belt: it might reduce the distortion.

Cleated sidewall belts are very expensive and folk still store them outdoors in all weathers because these belts are great clumsy things which take up a mountain of room. Do you have spare belting, you should have, as part of a 2 years spares supply. Try integrating this into the system such that the bow can be spread out and balanced if possible. I've never been directly involved with splicing cleated sidewall stuff but I imagine it will be trickier and therefore more expensive than usual fare.

Be thankful it didn't freeze! Was the belt still crated when the bow was discovered?

You need the manufacturer's advice here regarding whether the belt sections referred to can actually carry well enough in their opposite direction. You might get better advice from him because he's in the money since your warranty is shot to pieces. ■

What kind of high angle conveyor are you referring to? ■

Dear Amy,

I have been involved in the manufacture of conveyor belting for a long time and unless this belt has a cut edge and was stored on its side then I cannot see this problem having anything to do with the weather unless there has been serious degradation of the belt on one side only and this should be clearly visible (it also infers this is a very old belt). It is in my opinion a manufacturing problem that the manufacturer is trying to blame on a storage issue. If it was caused by moisture ingress on one side of the belt, storing it for a period in very dry slightly heated conditions should sort the problem out to the point it is usable. Much more likely this belt was manufactured a wider width and was then slit down the middle. You need to check the edges of the belt to see if the weave of the fabric looks identical both sides and secondly check the actual thickness of the belt either side. These are two quick checks to see if it is belt related. there are however other potential causes. Other than if it was caused by moisture the only other possible fix is high tension i.e. trying to pull it straight but this is unlikely given what you have described

Cheers

Colin Benjamin

Gulf Conveyor Systems Pty Ltd

www.conveyorsystemstechnology.com ■

About this problem happened have two reason:

1.Splicing reinforcing material error

2.Reinforcing Material error;

Normally the new conveyor belt life time is 12 months, and for the storage time will longer.

*Roger Gu *(Marketing Director)

Huanyu Rubber Group

E-mail:huanyuroger@aliyun.com

http://www.fxjt.com.cn

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is there any image or diagram for it? ■

Originally Posted by rogergoo

About this problem happened have two reason:

1.Splicing reinforcing material error

2.Reinforcing Material error;

Normally the new conveyor belt life time is 12 months, and for the storage time will longer.

*Roger Gu *(Marketing Director)

Huanyu Rubber Group

E-mail:huanyuroger@aliyun.com

http://www.fxjt.com.cn

Dear experts,



I had asked this query "How the reinforcing material is selected for steep angle belts? ". But never got the answer. May be considered as technical secret by the manufacturers.

Even for storing of conventional belts is limited only maximum upto 6 months, even if all the guidances of supplier are followed. Steep angle belts storage duration could be lesser than that and also need more care than conventional belts.

Splicing procedures cannot be same as that of conventional belts.

As far as I know, there are no standardisation done for steep angle belts.

Regards,

S.Ganesh ■

Originally Posted by sganesh

Dear experts,



I had asked this query "How the reinforcing material is selected for steep angle belts? ". But never got the answer. May be considered as technical secret by the manufacturers.

Even for storing of conventional belts is limited only maximum upto 6 months, even if all the guidances of supplier are followed. Steep angle belts storage duration could be lesser than that and also need more care than conventional belts.

Splicing procedures cannot be same as that of conventional belts.

As far as I know, there are no standardisation done for steep angle belts.

Regards,

S.Ganesh

I fully concur with your observations.

Because of the procurement issues with belt conveyors it is practically impossible to satisfy the manufacturers' demands for belt storage. Leads times from suppliers are quite long and often conflict with the structural timetable. For larger projects involving long distance conveyors the belt storage time and methods can easily invalidate the warranty even before the belt can be installed. A very similar history exists for cleated sidewall installations.

There are cases of inexperienced main contractors ordering the full stock of 56km overland belt before the supportive steelwork had been designed. The belts were left in coastal, desert sunshine for the interim period.

Considering the straightforward manufacturing processes involved it behoves me to claim that the problems lie entirely with the manufacturers and buyers agents. Supermarkets have about 10,000 items on their shelves in each store and their distribution centres supply about 120 large stores. They manage to mention the sell by date for ALL those perishables because it is legally required, good stock control and good manners. Belt suppliers should please take note.

Evidence to support my outrageous claim follows. Australian subsidiaries of belt filter manufacturers all claimed a lead time of 18months and quoted the specialised grooved belt supply, from Italy, as the delaying factor. My client had been seduced into this situation before my eventual engagement and had produced his schedule accordingly. On a comprehensive examination of the bids the spares list showed that a replacement belt was available within 28 days for a modest premium. In truth, if there is such a thing throughout that business, the client could have delayed filter plant CAPEX for fifteen months. There were 21 filters on order. Although the client would not, did not or could not alter the schedule I became convinced that certain belt and filter suppliers operate on marginal credibility.

Specialised belts are usually supposed to remain in the packing case until required. I have seen the packing cases and they offer a minimum protection, none at all really, against climatic conditions. If they are stored for a long time they can't do what is says on the box. There might be specific mention on the documentation but the storekeeper and his assistant are not likely to understand the implications.

In most parts of the world where logistics are stretched (Ho, Ho, Ho) the belt manufacturer cannot lose.

"May be considered as technical secret by the manufacturers." I can still remember the time when the situation was 'If they knew they would tell you to show that they knew what they were doing.' Those were the days!

PD How many approaches from Chinese belt suppliers have members received so far this year? ■

Dear Mr.John/other experts,



I remember, I had asked for weather proof packing to protect the belt from sunlight, humidity, and to maintain preferred temperature by special container having suitable ventilation systems.

All these could be value added service and charged to end customers. This arrangement may reduce the ill effects on careless or extraordinary long storage requirements, since many such special belts are mandatory to be kept in stock.

Though such arrangements are not heard, hope it would be available in future.

Thanks and regards,

S.Ganesh

9033481676 ■

Dear Mr.Ronald / other experts,

In absence of standards for steep angle belts, selection of required supplier is very difficult. Please note that end users, ( manufacturers also ) do not know how the reinforcement materials are selected for these conveyors, which contributes major part in belt cost. In my humble opinion, there are many grey areas in this field. Who would be taking action, for standardisation?

Pulleys standardisation is another area. There are lot of scope to both suppliers and buyers in saving time and money in finalising the conveyor pulleys requirements.

Also steelcord belts. By standardisation of cords diameter and pitches for different ST values, we can expedite the purchase and also their repair/joining kits in future.

Having above done can be helpful for all, specially to site engineers.

Thanks and Regards,

S.Ganesh ■

It surprises me, during these times of political turmoil and cheap oil, that anyone is contemplating the undertaking of overland conveyors outside N America.

Such machines require enormous spares holding or, on the reverse side of the coin, tremendous downtime. They are also a fixed investment which is quite worrying. If a reputable belt manufacturer can supply a replacement belt in reasonable period then why can't he supply a new belt accordingly. The other inference is that the off the shelf belt was a remnant and the user might as well have ordered extra spares to begin with, at yesterdays cost. The difference is still probably the same apart from the delivery downtime. I reiterate, in a roundabout way, that the procurement and supply of conveyor belting is a black art operating in the land of the blind where the one eyed man himself is only partially sighted. I would also like to mention that I deeply respect the blind.

High angle conveyors are usually confined to the plant when some plant layout designer got pushed into a corner by circumstances not of his or her making. With apologies to Joe Dos Santos and Amy we seem to be discussing the fancy side of the business rather than their straightforward/straightup pressed belt system. Once again, if Joe and Amy's tackle was used there would be better spares availability etc. DSI's respect for the forum etiquette does not mean that the advantages should not be mentioned at all in this context. ■

Originally Posted by johngateley

With apologies to Joe Dos Santos and Amy we seem to be discussing the fancy side of the business rather than their straightforward/straightup pressed belt system. Once again, if Joe and Amy's tackle was used there would be better spares availability etc. DSI's respect for the forum etiquette does not mean that the advantages should not be mentioned at all in this context.

John, thank you for the plug. From the beginning (1979-1981) I developed a system that utilized existing, proven equipment and components in an advantageous way. The advantage of course is the ability to convey bulk material at high angles. We did not seek to invent any component or equipment itself as that would compromise the intent, requiring a time period of proof for any new component or equipment. Subject to the loads and duty for which these components and equipment were developed they deliver the same performance characteristics at our Sandwich Belt high angle conveyors that they previously delivered and continue to deliver at conventional conveyors. As you have pointed out nothing fancy. ■