- #1
RDTHOMGT
- 2
- 2
So, this problem is going to require some explaining..
I'm a Production Engineer who's recently started working at an adhesive tape converter/distributor and I've been working on an industrial rewinding machine for films, tapes, foams etc. The tapes I rewind range from 0.2mm - 3mm thickness, 1000mm - 1300mm in width, and up to 500M in length (diameter of each bulk roll being up to 800mm).
I'm familiar with the principles & equations of tension control:
The rewinder I'm working on was purchased abroad for a low price.
PROBLEMS:
I want to be able to use my document to find the best settings possible instead. Not just log down what the best settings are.
So I'm basically asking:
1. Does this format I have fall in line with the principles? Is this all correct to ensure the best control of the web?
2. What can I do to properly have a benchmark of settings that I can calculate BEFORE rewinding? Instead of rewinding to find the best settings?
3. Is there any attachable equipment/gauges/devices anyone knows of which can indicate web tension at any given setting?
As you can propably tell, this has been a strenuous task... The only other idea I have is to test a strip sample of each tape on a tensile tester at the workplace, to which I can then apply the principle (25% of tensile strength is optimal rewind tension) to at least have some idea on what will be ideal..
Thank you for reading, I hope someone can understand what I'm saying/assist with my problem!
I'm a Production Engineer who's recently started working at an adhesive tape converter/distributor and I've been working on an industrial rewinding machine for films, tapes, foams etc. The tapes I rewind range from 0.2mm - 3mm thickness, 1000mm - 1300mm in width, and up to 500M in length (diameter of each bulk roll being up to 800mm).
I'm familiar with the principles & equations of tension control:
- linear rate of tension decrease from unwinding bulk roll, and linear rate of tension increase as rewinding roll builds.
- The ideal tension is around 25% of material's tensile strength
- Tension = Torque/Radius
- Pounds per Linear Inch (PLI) = Total Tension (lbs) / Web Width (in)
The rewinder I'm working on was purchased abroad for a low price.
PROBLEMS:
- Unfortunately, the TENSION CONTROLS for this machine are completely MANUAL.
- The AMMETER reading dials are not accurately calibrated to the corresponding amps of the brake (at the unwind mandrel, this ammeter stops at 2A) and the induction motor (at the rewind mandrel, the ammeter stops at 2.4A).
I want to be able to use my document to find the best settings possible instead. Not just log down what the best settings are.
So I'm basically asking:
1. Does this format I have fall in line with the principles? Is this all correct to ensure the best control of the web?
2. What can I do to properly have a benchmark of settings that I can calculate BEFORE rewinding? Instead of rewinding to find the best settings?
3. Is there any attachable equipment/gauges/devices anyone knows of which can indicate web tension at any given setting?
As you can propably tell, this has been a strenuous task... The only other idea I have is to test a strip sample of each tape on a tensile tester at the workplace, to which I can then apply the principle (25% of tensile strength is optimal rewind tension) to at least have some idea on what will be ideal..
Thank you for reading, I hope someone can understand what I'm saying/assist with my problem!