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Crealet introduces new BLDC controls at ITMA

Sep '19
Pic: Crealet
Pic: Crealet
Crealet AG, the world's no1 manufacturer of electronically controlled warp feed systems for weaving machines and reliable mechanical engineering, had a successful run at ITMA 2019 – themed 'Innovating the World of Textiles'. At the show, Crealet introduced new BLDC controls with software that has been specifically designed for the textile industry needs.

The BLDC controls are used for warp feeding on narrow weaving machines and to control the selvedge threads to wide weaving machines in order to prevent waviness at the selvedge area, according to a press release by Crealet.

The new BLDC control regulates the warp tension, which was designed for applications in narrow weaving, a particular eye-catcher that attracted special attention at the ITMA show.

The BLDC control for warp tension is a pure Swiss innovation. The control meets the highest demands for precision and dynamics and can be quickly adapted to product- or customer-specific requirements.

At the ITMA, Crealet presented for the first time a selvedge yarn feed system with the BLDC control suitable for wide looms.

When weaving dense fabrics, the selvedge areas of the fabric may be looser than the rest of the fabric. The result is a selvedge waviness, also known as floppy selvedge. The wider the fabrics are produced, the more pronounced the waviness becomes. Due to the wavy selvedges of the fabric it is difficult to process them because the edges cannot be held with the same tension as the rest of the fabric. The fabrics are often coated in a second phase. The wavy selvedges also have a negative effect during coating process. Due to the loose edges a uniform coating of the fabric is almost impossible.

The new BLDC control for yarn feed systems on wide looms increases the precision of the yarn tension and opens up new perspectives in regard to controllability and error avoidance.

Crealet presented at ITMA for the first time the 'Linked Motion Control', a warp yarn feed system with PC-based control technology in which several warp beams can be linked with each other. This possibility opens up a major leap in automation in the production of narrow textiles. Investments in warp feed systems help to reduce resources and cost and simultaneously increase productivity and efficiency.

Due to the increasing demands on quality, punctuality and costs, textile companies are called upon to permanently optimise their machinery and production processes. Warp thread tension is an important process in weaving. From the full to the empty warp beam this parameter must be kept constant. The same conditions must be created for weaving from creel, because, in both cases, warp thread tensions that are too high or too low lead to warp thread breaks, which counteracts good weaving behaviour.

With electronic warp let-off devices from Crealet, weavers can benefit in three ways: the balanced tension reduces the machine load, increases the efficiency and improves the fabric quality.

With the BLDC control, presented at ITMA Barcelona, and the corresponding load cells, existing let-off devices can be retrofitted. Crealet uses safety chucks for larger warp beams. These offer safety during unwinding and winding. The closing mechanism can only be opened when the machine is at a standstill and when the opening mechanism is at the top. It is also very easy to insert the warp beams using the inclined handwheel. (PC)

Fibre2Fashion News Desk – India

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September 2019

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