Rieter

Winding by rolling and lap forming

Index

In this type of winding operation, a product of substantial width, such as a lap or a web, is wound up over its full width on a mandrel or a tube (Fig. 79). A traverse mechanism is unnecessary since the width of the product is the same as that of the receiving tube. In this case, winding is a very simple procedure. However, unwinding is not always so easy. It can happen that the individual layers of the lap do not separate cleanly.

They cling to each other, tear apart, or scale apart and thus produce disturbances. This will occur all the more readily if the lap does not form a closed, self-isolating separating layer. A random arrangement of fibers on the lap surface separates the individual layers from each other substantially better than an arrangement with a high degree of parallelization.

This can often be seen clearly in the raising of hairs on the ribbon lap machine in combing.

Fig. 79 – Winding of lap layers on a mandrel