Rieter

Package transport between the rotor spinning machine and subsequent zones

Index

With  automatic package change the cross-wound packages replaced by the robot are placed on package conveyor belts (one each for the right-hand and left-hand sides of the machine). When a preset number of finished packages has been placed on the conveyor belt, the package conveyor belt is automatically started and the packages are transported to the end of the machine. Various concepts are available for package removal itself. The previously customary manual package removal at the end of the machine has been complemented increasingly by systems with different degrees of automation.

The packages delivered to the end of the machine are placed automatically or manually in containers, on pallets or creel trolleys at the machine itself and taken away, or alternatively the packages are transported on overhead conveyors or conveyor belts (Fig. 65) to the subsequent process stages for immediate further processing or to the material store. In the material store they can be deposited in containers or boxes for packaging, palletized for onward dispatch or, depending on transport logistics, direct supply to weaving, warping or knitting operations.

Manufacturers of rotor spinning machines either offer their own systems for automatic doffing and/or provide appropriate interfaces that enable users to connect third party suppliers‘ doffing systems.

In practice the concept of resorting to specialist suppliers‘ doffing systems is becoming increasingly established. The user, i.e. the spinning mill management, is therefore able to choose the appropriate system for his operating conditions from a wider range. Connecting third party systems calls for close cooperation between the machine manufacturer and the supplier of these systems, especially for the initial installation.

Contract spinning mills and textile companies where yarn manufacturing and processing are in different locations prefer to use systems with automatic doffing on the rotor spinning machine and direct deposit on pallets (Fig. 66). These systems are now developed to such an extent that the removal of packages from the machine, their deposit on the pallet, the positioning of intermediate liners and the film-wrapping of the full pallets are performed automatically. Package size, package shape and deposit pattern can be programmed.

Fig. 65 – Automatic doffing and transport of packages to the palletizing unit

Fig. 66 – Automatic palletizing unit with protective grid on the rotor spinning machine