Rieter

Other dimensions in spinning geometry

Index

Balloon height lB (Fig. 82):
Every spinner is interested in producing large packages to increase their running time on subsequent machines, at least as long as the large package does not influence productivity. As cop size is a function of ring diameter and tube length (lK), choosing large dimensions in both might be considered. However, this is not possible because the larger the ring diameter the lower the production rate, and tube length depends on ring diameter. If the tube is too long, the balloon becomes too high for its diameter and this implies considerable tension differences between winding on the cop base and winding at the top. Even when using balloon checking rings, as is mostly the case, a balloon of this shape is unstable. It might – and in fact often does – collapse, leading to ends down.The ratio of ring diameter to tube length should be about 0.2 to 0.225.

Lift lH:
About 20 mm shorter than tube length lK.

Distance from top of tube to thread guide (lappet) (lF):
At least 2 x dH + 5 mm.

Basic setting lR (distance from ring to balloon checking ring):
Slightly less than half length lB.

Ratio of tube outside diameter at top to ring diameter:
About 0.45 to 0.5.

Fig. 82 – Spinning geometry angles and dimensions