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How to roll pyro-tubes


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#141 dagabu

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Posted 08 December 2018 - 08:45 AM

I suppose so but it's an instinctual path to hunt and problem solve until the quarry is bagged.

I have an entire winter to gnash my teeth and knead my hands over tube rolling, to search for the best possible solution for me with the materials at my disposal.

My wood shop is stuffed to the ceiling with supplies and I can hardly open the door so no making machines or other hobbies can be worked on until we move.

Looks like it's all tubes all the time this winter!

You guys do make it hard for yourselves! good luck! :D


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#142 Col

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Posted 08 December 2018 - 10:07 AM

The stuff i`m using for the test is pretty basic, a 40" x 24" piece of mdf, 1m x 60mm od tube, paint brush, glue and 12" of 19.15mm od solid ptfe rod.

Attached File  materials.jpg   30.1KB   1 downloads


Edited by Col, 08 December 2018 - 10:23 AM.


#143 dagabu

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Posted 08 December 2018 - 10:43 AM

What is the 60 mm tube for?
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#144 Col

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Posted 08 December 2018 - 02:18 PM

The 60mm tube is a former which converts the big notched sheet (in the paper pic) into a 3-ply 3ft x 190mm single sheet with feathered ends, 60mm* Pi is 190mm ish per turn ;). The first turn is not glued, the 2nd and 3rd turns are glued. After rolling, its cut lengthwise at the paper`s start/end point (exactly 3 turns) and opened out. Note, the grain direction is shifted automatically. It goes onto the former in this direction: IIIIII and comes off in this direction: ===


Edited by Col, 08 December 2018 - 02:21 PM.


#145 dagabu

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Posted 08 December 2018 - 03:10 PM

I am missing something here, you calendar it up on the 60 mm tube then roll the calendared paper on the 19.15 mm rod?


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#146 Col

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Posted 08 December 2018 - 06:03 PM

Yep, exactly that, roll a 3ft long 3-turn 60mm id tube using a 3ft x 570mm sheet of kraft. Cut it lengthwise along the line where the first turn starts and the last turn ends. Use the 3-ply sheet to roll the 3/4" tube. A metre of 2.5" od tube would`ve been a better fit (200mm per turn) for the 3ft x 2ft sheet but 60mm is all i had on hand.

 

Marking a line on the former makes aligning the sheet easy, attach it to the former with 2 small tabs of thin tape on the corners of the kraft sheet. Those points will become the ends of the final tube. Attaching the sheet to the former makes applying the glue easier, cos the paper is pinned down by the former and it has half of the 1st turn on it. You can roll the tube without worrying about aligning anything so there`s no delay or panic. The 3 x 2 sheet will take 15 seconds or less to roll onto the former.


Edited by Col, 08 December 2018 - 06:40 PM.





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