Hongda detection and control technology intelligently enhances printing and dyeing levels
October 07 11:05:16, 2025
China's printing and dyeing machinery has gone through a series of technological advancements, evolving from Type 54, Type 65, and Type 74 to the more advanced Type 96. With widespread application of PLC technology, the industry has largely caught up with international standards in terms of machinery performance. However, when it comes to control technology—especially the critical challenge of "online detection of process parameters"—it still lags behind global leaders. Domestic monitoring of key factors like tension, concentration, and moisture content, which significantly affect product quality, environmental protection, and energy efficiency, is either in its early stages or not yet implemented. Gu Ren, Chairman of the company, highlighted that this is one of the main bottlenecks in the industry.
For example, in current printing and dyeing machinery, the synchronous transmission system primarily focuses on ensuring smooth fabric movement, often using weight or cylinder pressure devices on elastic frames. This qualitative approach meets some large-scale production needs but falls short when it comes to quantifying tension for small-batch and multi-variety fabric production—a growing trend under WTO conditions. To address this, Changzhou Hongda identified market demands and began developing independent intellectual property solutions.
One of the R&D directions led by Gu Ren involves replacing the traditional "constant linear speed" system with a "constant tension" synchronous transmission system. After extensive research, the company chose constant tension as a breakthrough point, investing 20 million yuan in the Changzhou Economic Development Zone to build a 13,800-square-meter engineering center. Collaborating with top domestic enterprises and universities, they established a high-level development platform. A key outcome was the development of a tension-monitoring-based synchronization control system, which effectively solves issues related to fluctuating tension and speed. The Sangma Awards jury praised the system for overcoming challenges like limited adjustable tension range and poor adaptability, meeting the growing demand for small-batch, multi-variety, and fast delivery in the industry.
Hongda’s core tension control technology has expanded its development potential. The company successfully launched a high-performance AC variable frequency vector control giant jigger, responding to market needs. They also completed quantitative research on critical process parameters such as cloth surface temperature, residual water content, and online monitoring of alkalinity and pH levels. These achievements, combined with the constant tension system, form the foundation of their online process parameter monitoring, becoming one of the most significant scientific innovations since 2005.
According to Gu Ren, Hongda’s online monitoring systems have greatly improved the automation level of China’s printing and dyeing equipment, providing essential support for the industry’s sustainable development. During the system’s development, the company also focused on addressing another major issue: pollution. Many strategic dyes, such as metal complex dyes, can release harmful heavy metals like chromium, cobalt, and copper, causing serious environmental damage. To tackle this, Hongda developed an online alkali concentration monitoring system using advanced photoelectric technology. It enables accurate detection, automatic parameter compensation, and computer-assisted functions like automatic dosing and feeding. This ensures precise alkali usage, saving at least 25% of alkali consumption, improving efficiency, and reducing environmental impact.
For an industry to achieve long-term sustainability, it must embrace information technology, automation, digitization, and environmental protection. Under Gu Ren’s leadership, Changzhou Hongda uses advanced detection technology to enhance the intelligence of the printing and dyeing industry while addressing environmental and energy-saving requirements. Through science and technology, the company is driving the sustainable growth of the entire sector.
Swing Bearing
Introduction to ZW Swing Bearing
Established in 2020 and officially put into the market in 2022, it is one of the leading products of Xingtai Zhongwei Zhuote Hydraulic Technology Co., Ltd. Widely used in construction machinery, engineering machinery, port machinery, metallurgy machinery, light industry machinery, wind power generation, medical CT, military industry and other fields, and exported to Europe, America and Southeast Asia in batches.
Product introduction and category
1. Product introduction:
As the "joint of the machine", the Swing Bearing is an important transmission component necessary for the machine that needs relative slewing motion between two objects and bears axial force, radial force and tilting moment at the same time; It is a mechanical component integrating supporting, rotating and fixing functions, which can greatly simplify the manufacturing, installation and maintenance of the host.
2. Classification of Swing Bearing:
In order to adapt to different use requirements, there are many structural types of Swing Bearings.
(1) The rolling elements can be divided into point contact type and line contact type according to their types;
(2) It can be divided into single-row, double-row and three-row roller types according to the structure type;
(3) It can be divided into internal toothless type and external toothless type according to the gear form.
1. Introduction to single-row four-point contact ball Swing Bearing
It is mainly composed of outer ring, inner ring, ball, spacer block and sealing belt. The four-point contact between ball and arc raceway can bear radial load, axial load and tilting load at the same time. Small and medium-sized engineering machines, such as small and medium-sized cranes and excavators, hydraulic excavators, rotating machinery, large and medium-sized excavators and other engineering machinery can be selected.
2.Features of point-contact ball Swing Bearing:
(1) The nominal contact between rolling elements and raceways is point contact (in fact, it becomes surface contact after being loaded, but the contact surface is still small), and the slewing resistance is small;
(2) The manufacturing error of raceway, installation clearance, elastic deformation of rolling ring and seat frame have little influence on the contact condition, so the above points are less sensitive to the bearing capacity;
(3) The contact stress is higher than the line contact, and the shear stress formed under the surface of the raceway during movement is larger, so the dynamic bearing capacity is lower than the line contact;
(4) The raceway section is curved, so it is slightly difficult to process and grind.
3. Production strength
ZHTE HYDRAULIC has an existing rolling production line for Swing Bearings, which can produce single-row row Swing Bearings. Carefully select medium carbon alloy steel as the raw material, and produce the raw blank through the rolling production line. This process can accurately control the accuracy of the blank, change the material performance, reduce the material stress, improve the material density, greatly improve the wear resistance of the material, and extend the service life of the parts.
4. Production process
The following operations will be carried out after the inspection of the original blank is qualified:
