How To Check And Make A Quality Control In Order To Find The …
Dear huggos,
First of all, what's the qulity grade of the rubber cover according to the DIN standard or other standard?
Secondly,In order to know the quality of the conveyor belt, I suggest that you can cut one sample to the EU supplier to let them test the quality of the rubber cover, on the other hand , is it possible for you to find one test orgnization to test the sample by yourself? you can know the exactly quality status of the rubber conveyor belt.
Thirdly, generally, the basic techinic data of the rubber cover include : tensile strength(MPA) ,abrasive wear(mm3), elongation at break(%), hardnes(shore A) , when there is cracks in the different place of the belt, one reason maybe the tensile strength of the rubber is too low. but we also need inspect if the working condiction is too rough for the belt.
At last, in the future, when you order the belts, it is better for you or you appoint one person to inspect every point of the quality before the delivery.
Kind regards
Vincent
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Originally Posted by huggos
However, during these days, the belt has shown quality problems like big cracks in different places (not at the splicing place)
We have contacted the supplier, but he is not convinced that this is a quality problem.
Please let me know what should I check and how can I make a quality control in order to find the real problem for this conveyor belt?
BR, huggos
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How To Check And Make A Quality Control In Order To Find The Re…
Your reply was very helpful.
Will try to get all the above mentioned with the Quality Certificates.
BR, huggos ■
Re: New Ep315/3 4+2, 1000 Mm
Originally Posted by huggosHowever, during these days, the belt has shown quality problems like big cracks in different places (not at the splicing place)
We have contacted the supplier, but he is not convinced that this is a quality problem.
Please let me know what should I check and how can I make a quality control in order to find the real problem for this conveyor belt?
BR, huggos
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Is the belt phyisical length 350 meters and in fact doubled to 700 meters of actual belting, or 175 meters in actual length with the return strand becoming 350 meters in length?
Is it a troughed belt or tubular-pipe belt.
My first thought was "is the ore side(thick side) carcass upside down?
Second "what is the diameter of the drive pulleys and head pulleys?"
Third "how much distance between the drive pulleys where the belt wraps?between the drive pulleys?"
Fourth is "how much pressure is on the take up?
Fifth is "which type of splice, mechanical or vulcanised?"
sixth, what are the ider and return idler spacings?
seventh, is it a head drive or mid drive unit?
eighth, is a gravity take up employed or a hydraulic take up?
As far as quality control I would cut a section of the belt out that is cracked/split etc. and send it to a laboratory for testing along with complete specifications for the belt in question.
I probably missed something but I am sure we can find the answer here
lzaharis ■
Re:
Actually attached herewith you may find some photos of the said belt.
The length is overall 350m and a troughed type.
Of course it is placed at the ore side and it is spliced by vulcanazing.
So... from the mechanical point of view, there is no visible problem to cause such damage in such short time...
BR, huggos
Attachments
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Re:
some more photos for the indication...
Attachments
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Re: New Ep315/3 4+2, 1000 Mm
The photo in post 5 - is that damage across the belt or longitudinal with the belt? Hard to tell from photo.
That is major damage for a new belt installation. ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Re:
Actually the crack is starts as at the foto below.. along the width side..
and it ends as showed in the photo nr. 2 above... cutting the belt by the width side.
Attachments
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Re: New Ep315/3 4+2, 1000 Mm
Is there a return belt V-plow to remove any spilled material from the return side of the belt before it gets to the tail pulley?
Jamming material between the belt and the tail pulley can cause damage similar to what you are seeing. Then as the T1 tension gets greater near the drive pulley it may be allowing the tear to increase to the point that it shows in your previous pic.
Just a thought.
P.S. - I moved this to the proper forum where you should get more responces from other members. ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Re: New Ep315/3 4+2, 1000 Mm
Originally Posted by huggosHowever, during these days, the belt has shown quality problems like big cracks in different places (not at the splicing place)
We have contacted the supplier, but he is not convinced that this is a quality problem.
Please let me know what should I check and how can I make a quality control in order to find the real problem for this conveyor belt?
BR, huggos
Dear Huggos
Is the crack appearing on the bottom cover side or the top cover side?
What is the dia of the pulleys (head, tail and snub) being used?
Regards
TC ■
Re: New Ep315/3 4+2, 1000 Mm
Hello huggos,
please take it on to Gray Blenkhorns reply: You need the correct scraper on return strand and maybe some more spillage protection / sealing at your loading chute!
If one enlarges pic. 1 of post 6 you can clearly see an object between belt and pulley. And if I read the 2 pics of same post correctly, there is no return strand cleaning device of any kind...
Regards
Roland ■
Re: New Ep315/3 4+2, 1000 Mm
I suggest that you can cut one sample to the EU supplier to let them test the quality of the rubber cover, on the other hand , is it possible for you to find one test orgnization to test the sample by yourself? you can know the exactly quality status of the rubber conveyor belt. ■
Re: New Ep315/3 4+2, 1000 Mm
In my experience it is very rare that a supplier would agree "first off" that your problem was a Quality problem.
Is there a difficulty on Forum in naming the supplier / manufacturer - maybe you could advise us as to the specification the belt was ordered under, the date and how it was stored and how long was the Warranty?.
It would also be interesting to view the suppliers / manufacturers responce
as to why it is claimed not to be a quality problem.
D M Ellis
DELMEC ■
New Ep315/3 4+2, 1000 Mm
I would agree with the comments regarding the material damaging the belt.
We are not there to do a full analysis but the photos do seem to indicate physical damage, likely by material getting into the pulley or perhaps from damage in the loading area.
As someone mentioned you should be able to tell which side the belt is being damaged from by looking for marks on the belt. If you can see cut, gouges, marks on the back cover I would investigate the tail pulley and if the marks are on the top spend more time investigating the loading area.
Testing may show that the belt is not what you ordered but I suspect you will spend time and effort on lab testing only to find that the belt meets minimum standards of what you ordered.
This does not mean that the selected belt is appropriate for the application - just that they supplied what you ordered.
Your application (once you solve any prolems at loading or the tail) may require a different belt specification to withstand the impact and operating conditions. ■
New EP315/3 4+2, 1000 mm
We have a Conveyor Belt EP315/3 4+2, 1000MM, which we bought recently from an EU company. The belt is 350m long.
However, during these days, the belt has shown quality problems like big cracks in different places (not at the splicing place)
We have contacted the supplier, but he is not convinced that this is a quality problem.
Please let me know what should I check and how can I make a quality control in order to find the real problem for this conveyor belt?
BR, huggos ■