Cylinder Size

[Doni]

Anyone can share the pros and cons of double vs triple size transfer cylinder for handling print stock ranging from 0,25mm - 0,8mm. And why only CD/CX102 used triple sized cylinder, while their CX 75 (which should meant for thick substrate) and other press manufacturer sticks to double sized cylinders.

 

[CHOCK]

Hi Sir
https://books.google.com.ni/books?id=GpouDwAAQBAJ&pg=PA240&lpg=PA240&dq=advantage+and+disadvantage+from+double+vs+triple+size+cylinder+Heidelberg&source=bl&ots=u3RdO9Hlfq&sig=epZfP0BmgOWc1VtFn2LCO8EkugM&hl=es&sa=X&ved=0ahUKEwimg8a9xfvbAhUwq1kKHS_4DrQQ6AEILzAB#v=onepage&q=advantage and disadvantage from double vs triple size cylinder Heidelberg&f=false

Please Read the difference, hope you very useful, from Heidelberg.

 

[turbotom1052]

the bigger the transfer cylinder and the bigger the impression cylinder the less wrap around you have of the printing substrate. Less wraparound equals less potential for slapping and smearing of the wet ink. I would think the smaller cx 75 has only a double sized was in an attempt to keep the presses footprint smaller and keep its height lower.

 

[Doni]

Noted, Thank you. So is it correct to say that triple size cylinder not a problem to run thinner stock too, such as 0,1mm?

 

[turbotom1052]

its my feeling that a press engineered to run thicker stock can run thinner stuff, but not optimally. whenever possible its always best to match the tool to the job. A Heidelberg CD in my opinion really shines when you really put the big lumber to it. When I say big lumber im talking bout sheets in excess of .012" Its air capacity and engineering may be a little tough when it comes to optimum sheet control on light text weight papers. Im sure some here may take issue with this statement, and claim that their CD runs anything, anyday but I question just how much fiddling you need to do to get it to feed, print and deliver. For me it all comes down to air control. When I say air control im talking about control from the feeder to the delivery and everything in between.

 

[alibryan]

Anyone can share the pros and cons of double vs triple size transfer cylinder for handling print stock ranging from 0,25mm - 0,8mm. And why only CD/CX102 used triple sized cylinder, while their CX 75 (which should meant for thick substrate) and other press manufacturer sticks to double sized cylinders.

I'm guessing the double transfers are more common because they cost less to produce, and have a smaller footprint. The newer ones are also equipped with skeleton transfer drums, and are fine for printing almost any thickness of substrate. From my experience though, a triple transfer press will also print any thickness just as well, so either double or triple is going to work just fine. I think the main difference from a user's standpoint, is floor space.