Tuesday, November 11, 2014

Web handling rolls #1 of 4

We have delvelped several types of metal rolls in the area of web handling  through discussions with customers.
They are classified in to 4 product categories. 
1. Air roll
2. Low-inertia roll
3. Fine patterned roll
4. Sleeves to hold magnetic parts insdie the forming roll

Today we talk about the first product category, Air roll.

Air roll is composed of a shaft, air, and the outer thin-wall metal sleeve.
Air is supplied from the outside and stays between a shaft and the outer meta sleeve.  This air supports the outer metal sleeve.  When this air roll is pushed by the other roll to form plastic, the metal sleeve surface yields and goes back to a flat state when it is not pushed.  This can happen because the outer metal sleeve is very thin and its tensile strength stands againt this pressure.  So this metalsleeve is flexible and provides nipping like rubber roll.  WHen this air roll is introduced, cooling and heating conditions are changed, which improves the entire forming conditions including rolling and strretching.
Air roll
THe outer surface metal sleeve, thickness 0.1mm, is flexible like rubber.

The producible range of the outer metal sleeve is form 19.8 to 260mm in diameter.

Contact by email: overseas@dymco.co.jp