Hello Folks,
This is the design idea of a hydrogel coater that I am working on.
Unwind>>Coat hydrogel>>Rewind
Spces:
300mm wide web.
6000mm machine length - can be upto 7000mm.
400mm dia max roll
40 kilos max roll weight
Hydrogel is very sticky and must be laminated both sides with siliconised liners (as shown)
There is plenty of good advise available on the forum and I wanted to share my plans so that your experience adds value to my project and help me in clearing my doubts
1. Unwind VFD in speed mode as line speed (max 10m/min min 1m/min) is process critical.
2. Rewind VFD in Speed mode(? or Torque mode?) with torque limits and taper tension option.
3. Ultrasonic diameter sensor to monitor UW and RW roll diameters and thereby control line speeds.
Queries:
aa)How to drive the Chill roll? the nip of the chill roll and the LDPE is important as that would push-out air and give a neat apperance with no bubbles. This will affect the tension zone as well?
bb) Should I incorporate a load cell? I was hoping that the idler at 6'O clock position of chill roll is a good location as it gives max wrap.
cc) Encoder position at exit of chill bed will serve well?
dd) Should the mesh roll and LDPE roll work on just pneumatic dancers and EM brakes? Will this suffice?
I am more into ladder logic of pneumatic and pick-and-place applications why was confused with so many varied options out there.
Omron claim to have ready made package for this application but the sales engineer who visited me was unsure of the mods that I needed - attached is their datasheet showing the application on page 13.
Thanks so much to all for taking your time out - I appreciate it.
This is the design idea of a hydrogel coater that I am working on.
Unwind>>Coat hydrogel>>Rewind
Spces:
300mm wide web.
6000mm machine length - can be upto 7000mm.
400mm dia max roll
40 kilos max roll weight
Hydrogel is very sticky and must be laminated both sides with siliconised liners (as shown)
There is plenty of good advise available on the forum and I wanted to share my plans so that your experience adds value to my project and help me in clearing my doubts
1. Unwind VFD in speed mode as line speed (max 10m/min min 1m/min) is process critical.
2. Rewind VFD in Speed mode(? or Torque mode?) with torque limits and taper tension option.
3. Ultrasonic diameter sensor to monitor UW and RW roll diameters and thereby control line speeds.
Queries:
aa)How to drive the Chill roll? the nip of the chill roll and the LDPE is important as that would push-out air and give a neat apperance with no bubbles. This will affect the tension zone as well?
bb) Should I incorporate a load cell? I was hoping that the idler at 6'O clock position of chill roll is a good location as it gives max wrap.
cc) Encoder position at exit of chill bed will serve well?
dd) Should the mesh roll and LDPE roll work on just pneumatic dancers and EM brakes? Will this suffice?
I am more into ladder logic of pneumatic and pick-and-place applications why was confused with so many varied options out there.
Omron claim to have ready made package for this application but the sales engineer who visited me was unsure of the mods that I needed - attached is their datasheet showing the application on page 13.
Thanks so much to all for taking your time out - I appreciate it.