What is an automatic doffing draw texturing machine? Simply put, it is a conventional draw-texturing machine, where the machine itself- rather than an operator - performs the doffing by means of an integrated exchanging device. It sounds quite straightforward, but the complexity lies in the detail of the exchange, where the process steps take place consecutively or in parallel: 1. Stopping and lifting the full bobbin 2. Separating the continuously fed yarn from the full bobbin without disrupting the process by feeding it into a waste container 3. Moving and releasing the full bobbin to a storage location 4. Providing an unused paper tube to the take-up cradle, clamping it in the right position at the right time 5. Moving the cradle back into the operating position 6. Placing the meanwhile fed waste yarn in a position that allows the end caps to catch the yarn 7. Continue with a new package formation The accuracy and the speed of these steps, along with the reliability of the performance, have to be at least the same as, but should generally be superior to, humans performing the same process steps.
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