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Honghai’s model of achieving high output maintaining best quality using Reter Card C 70

Winterthur (Switzerland) based Rieter is one of the leading yarn processing machinery manufacturing companies in the world. Honghai Hangzhou Textile Co. Ltd. a potential customer of Rieter has taken an aim to become China’s largest manufacturer on the market for air-jet-spun yarn. Despite increased energy and personnel costs, the company’s goal is to market a yarn offering a high level of quality and consistency. The company has invested in a full system of semi-automated rotor-spinning machinery from Rieter, producing an annual output of 50 000 tons of Ne 10 and Ne 30 viscose yarn.

Rieter C 70 card machine in Honghai
Figure: Rieter C 70 card machine in Honghai production line.

These yarns are high quality and have a demand in the local and international market also. As a demand, the company is selling these yarns in the Zhejiang, Fujian and Guangdong regions in China and are also exporting to international markets (Brazil, Turkey, etc.).

In 2016, Honghai faced a very high demand for viscose yarn. The C 70 card machines from Rieter, which already deliver a high level of performance, processing 80 to 115 kg of sliver per hour, were unable to meet the demand. To meet the production demand Rieter recommended enhancing the card production with new technological parts. It was extremely important to the customer that the quality level of the sliver was retained, even at higher production speeds.

Upon this recommendation, Honghai decided to test various parts with new technologies such as an aero-dynamically optimized profile, or “tongue” that influence the transition of the fibers from the card cylinder to the doffer. During the trial period, the company then ran two cards with a high level of success, achieving a production rate of 160 kg/h each while maintaining the sliver quality.

“With Rieter’s innovations and technology we could maximize our profits with high production rate although the costs for the conversions were very low. As a result, we have bought more sets of parts and upgraded all our cards,” said Xinfeng Cui, Mill Manager at Honghai Hangzhou Textile Co., Ltd.

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