Printed Carton Boxes - Operational Performance Testing

You could spend huge amounts of money on machines that don't perform as well as the human eye.
I'd suggest samples of 'good' 'poor but acceptable' and 'reject' for comparison checks. You may need multiple samples to cover alignment, colour and surface finish.
Establish a batch sampling regime using an inspector with proven good colour vision (Google '100 hue test' ).
Talk to the printer of the boxes about his quality control methods as they have doubtless met these issues before.
Del

Thank you for your suggestion. Actually, it is my fault that i have not explained the operational performance. I mean, operational performance of the boxes is related with their processability during cartoning. For example some boxes do not open properly during cartoning thus tubes cannot be placed in them. The reasons for this are different. I want to detect such defects without applying an industrial testing because it is useless. That is why i have asked some test metohods or criteria about this issue like one may say that although it can change by machine, opening of cartons can be measured in terms of bla bla bla.

On the other hand, i agree with you about the visual inspection subject and doing almost the same.

Rgds,

Hasan HULKIENDER

You need to apply the same type of thinking to the handling problem, try to find out what the exact problem is which is causing the misshandling.
I always say that solving problems is easy...
The hard part is identifying the problem.
Maybe highspeed video would help you identfy what's happening?
good luck, let us know what you find.
Del

Del the Cat,

Indeed, the problem has been identified (the cuases of problems, actually). As i said, there are different reasons for this problem. Every reason results a problem in a different stage of box openings.

What i want to do is to constitute some standards, by this way i can reject non-conforming parties without testing them in the operation.

Thank you for your contributions.

I'm not aware of any standards for this, though TAPPI might be able to help. I'm assuming you already own the machine you want this information for. If you are having problems with an existing carton vendor you will most likely have better results working with them to resolve these issues. The two biggest factors are machine setup and carton variability. A property value such as gauge or laminate thickness won't do much good if the vendor isn't controlling their glue process well enough and that is what is causing your problems.

On the other hand, if you are evaluating new carton vendors, run some trials with their samples. Or arrange a visit to their testing facilities. Even though it looks like you are looking for a property value that will tell you at a glace that such and such a number means you can run at such and such a rate without any problems, any number you find will likely not have been tested on your particular machine.

Dear Andrew,

Yes, you are right that we have the machine. We know that it is not general related with machine set up. But it is not also related with just the carton variability. Sometimes, surface finish properties are in act and sometimes the foldings of the cartons as well. I am searching from TAPPI also but i think that a person who solved this issue in the past will be more helpful for us.

Carton vendor's quality control procedures are problematic also but we need to provide some standards them before having them to improve their quality control acts.

Thank you for attention.

Rgds,

Hasan HULKIENDER