Hongda detection and control technology intelligently enhances printing and dyeing levels
October 07 11:18:21, 2025
China's printing and dyeing machinery has evolved from Type 54, Type 65, and Type 74 to the more advanced Type 96. Building on extensive use of PLC technology, the industry has largely aligned with international standards in terms of machine performance. However, when it comes to control technology—especially the critical issue of "online process parameter detection"—it still lags behind global leaders. For instance, real-time monitoring of key parameters such as tension, concentration, and moisture content, which significantly impact product quality, environmental protection, and energy efficiency, is either in its early stages or not yet implemented at all, according to Gu Ren, Chairman of the company.
In existing printing and dyeing machinery, the synchronous transmission system typically relies on tension control to ensure 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 for small-batch, multi-variety fabric processing—a growing trend under WTO conditions. To address this, Changzhou Hongda focused on market demands and initiated R&D with independent intellectual property rights.
One of the key directions led by Gu Ren was replacing the traditional "constant linear speed" system with a "constant tension" based synchronous transmission system. After extensive research, the company decided to prioritize constant tension as a breakthrough point for improving automation. It invested 20 million yuan in the Changzhou Economic Development Zone, building a 13,800-square-meter engineering center. Collaborating with leading domestic manufacturers and universities, the company established a high-level R&D platform. A major outcome was the development of a tension-monitoring-based synchronization control system, which effectively addresses issues like fluctuating tension and speed, limited adjustable ranges, and poor adaptability to different fabrics.
Hongda’s core tension control technology has expanded its growth potential. The company developed a high-performance AC variable frequency vector control giant jigger to meet market demands. Additionally, it conducted 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 backbone of the company’s online process parameter monitoring. They have become one of the most significant scientific breakthroughs since 2005.
Gu Ren emphasized that Hongda’s online monitoring systems have greatly improved the automation of China’s printing and dyeing equipment, providing a solid foundation for the industry’s sustainable development. Beyond automation, the company also focused on solving another pressing issue: pollution. Many new materials used in printing and dyeing processes can cause environmental harm, such as metal complex dyes that release toxic heavy metals like chromium and copper. To address this, Hongda developed an online alkali concentration monitoring system using advanced photoelectric technology. It enables precise detection, automatic parameter compensation, and computerized processing, including automatic dosing and feeding functions.
According to Gu Ren, these features allow the company to reduce alkali usage by at least 25%, significantly improving efficiency while protecting the environment and cutting costs. Under the leadership of Gu Ren, Changzhou Hongda continues to leverage advanced detection technologies to enhance the intelligence of the printing and dyeing industry. By focusing on both automation and environmental sustainability, the company is driving the industry toward long-term, eco-friendly development through the power of science and technology.
I. Introduction to ZHTE HYDRAULIC Excavator Excavator Hydraulic Pump
The "ZHTE HYDRAULIC" Excavator Hydraulic Pump is one of the company's flagship products. It was officially launched in the market in 2016 and is widely used in machine tool forging, metallurgy, engineering, mining, shipbuilding and other machinery as well as other hydraulic transmission systems. And it has exported to more than 100 countries and regions such as France, Germany, Singapore, Russia, South America and Southeast Asia in batches, with a market share of over 60% in China.
II. Product Introduction and Categories
1. Product introduction: The Excavator Hydraulic Pump is the power component of the hydraulic system, which converts the mechanical energy of the prime mover into hydraulic pressure energy. It refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system. The Excavator Hydraulic Pumps used in hydraulic transmission systems are positive displacement Excavator Hydraulic Pumps, which rely on periodically changing enclosed volumes and flow distribution devices to operate. The main forms are generally gear pumps, vane pumps, and piston pumps. The performance of the Excavator Hydraulic Pump directly affects the working performance and reliability of the hydraulic system.
2. Product classification: ZHTE HYDRAULIC mainly produces axial piston pumps, which are divided into through-shaft axial piston pumps, bent-shaft axial piston pumps, and parallel-shaft axial piston pumps.
3. Axial piston pump is a piston or plunger reciprocating direction parallel to the central axis of the cylinder. The oil is distributed by the oil distribution plate, the cylinder rotates, and the variable head variable swash plate axial piston pump is used. The pump adopts the optimal oil film thickness design of hydraulic static balance, which enables the cylinder body and oil distribution plate, sliding shoe and variable head to operate under pure liquid friction. It has the advantages of simple structure, small size, low noise, high efficiency, long life and self-priming ability.
4.Axial piston pumps have various variable forms to meet the requirements of users, and are widely used in machine tool forging, metallurgy, engineering, mining, shipbuilding and other mechanical and hydraulic transmission systems.
III. Production Process
1. Casting blank (inspection)
2. Rough turning (inspection)
3. Normalizing (inspection)
4. Fine turning (inspection)
5. Drilling and milling (inspection)
6. Deburring (inspection)
7. Carburizing treatment (inspection)
8. Chamfering and deburring of teeth (inspection)
9. Shot blasting (inspection)
10. Inspect, warehousing, and rust prevention (inspection) as per the drawing
11. Inspection before assembly
12. Cleaning before assembly
13. Assembly
14. Product form and product performance test, pre-delivery test
15. Add lubricating grease
16. Painting treatment (inspection)
17. Packaging and packing (inspection)
18. Warehousing of packaged finished products
ZHTE HYDRAULIC Excavator Hydraulic Pump undergoes full-process inspection, with strict quality control and guaranteed quality.
V. Enterprise Qualification
The company has five major system certificates (quality, safety, environment, energy, intellectual property rights) and the CE certification of the European Union. It has been rated as a national high-tech enterprise, a national specialized and innovative "little giant" enterprise, a national intellectual property advantage enterprise, and also a provincial A-level research and development institution, a provincial enterprise technology center, a provincial engineering hydraulic transmission technology innovation center, a provincial specialized and innovative demonstration enterprise, a provincial single champion enterprise, a provincial specialized and innovative backbone enterprise, and a provincial civilized unit. The credit rating of the enterprise is AAA, and the bank credit rating is A. The enterprise has participated in the formulation and revision of 6 national standards, published 5 enterprise standards, and has obtained more than 100 national authorized patents and 114 trademark ownerships.
