From a Stalled Microwave Proposal to a Breakthrough with Infrared Drum Testing

During the initial evaluation phase, a microwave drying solution was considered. However, the overall equipment investment cost proved to be too high, raising concerns about capital expenditure. Even when a technology is technically feasible, a project cannot move forward if it does not align with budget expectations. Through the support of a Japanese distributor, the client sent actual airbag fiber materials to TsungHsing's facility for testing. Several drying methods were evaluated before shifting to a compact infrared system for real-material validation.

The test results demonstrated that the infrared drum dryer was particularly effective in removing surface moisture from lightweight materials. Drying speed was fast, and production capacity met the client's expectations. From test report preparation and distributor proposal to final customer approval, the entire decision-making process took approximately two to three months, allowing the project to move forward quickly.

Core Advantages of the Infrared Drum Dryer

The infrared drum dryer is particularly suitable for applications in the rubber and chemical industries, sludge and industrial waste treatment, material recycling, and circular economy processing. In this project, the system was specifically applied to lightweight, thin, and fibrous materials. Infrared radiation directly targets the material surface, accelerating moisture evaporation while the rotating drum ensures uniform exposure and consistent heating. This enables shredded and washed airbag fabric fibers to quickly reach a condition suitable for reprocessing.

Actual test data demonstrated that a 30 kg batch of material could be reduced from 21.9% moisture content to 3.24% within approximately four minutes of infrared drying. Such efficiency not only significantly shortens processing time but also enhances stability and consistency in downstream reprocessing operations.

Lessons from the First Unit: Optimizing Specifications for the Second System

The first unit supplied was a standard model originally designed for drying plastic pellets. However, when applied to large-scale processing of airbag materials containing fibers and dust, several operational challenges became evident. The screw feeding system, when handling cotton-like fibrous materials, was prone to clogging and in some cases increased motor load. In addition, the limited exhaust capacity affected moisture removal efficiency, causing drying performance to decline as production volume increased. Furthermore, fibrous dust tended to accumulate on the infrared lamps, reducing heating efficiency and shortening lamp service life.

In the second unit, these operational issues were transformed into clearly defined engineering upgrades through close collaboration between our R&D team and the client. The feeding mechanism was redesigned from a screw conveyor to a slide-rail system, significantly reducing the risk of material clogging when handling fibrous airbag waste. An enhanced exhaust and ventilation system was also integrated to accelerate moisture discharge, ensuring stable drying efficiency even as production capacity increased. In addition, protective lamp covers were installed to minimize dust accumulation on the infrared heating elements, reducing damage risks and improving overall maintenance conditions. Through this two-stage procurement process—from initial production validation with the first unit to specification optimization in the second—the infrared drum drying system evolved from a feasibility test machine into a stable, mass-production-ready solution.

Commissioning, Installation, and Cross-Border Collaboration

Upon completion of the equipment, the client was invited to our facility for final acceptance testing, and the overall results met expectations. Installation took place during the winter season in Japan. Despite the severe cold weather, the project was completed on schedule, including equipment handover and operational training. Subsequent feedback from the client highlighted the strong technical performance and cost competitiveness of the solution, while also recognizing the professionalism and responsiveness of our team. Since commissioning, the system has operated without major issues, demonstrating the reliability and stability of the infrared drum dryer in industrial recycling applications.

Establishing a Replicable Drying Model for Vietnam's Recycling Industry

The client's first infrared drum dryer was installed at its Japan facility, integrated into an automotive material recycling and reprocessing production line. Within waste recycling manufacturing systems, the stability and efficiency of the drying stage directly influence overall product quality and the feasibility of future overseas expansion.

Following successful mass-production validation, the infrared drum dryer effectively resolved the surface moisture removal challenges associated with lightweight airbag fabric fibers. The system demonstrated stable drying efficiency, production performance aligned with expectations, and reliable operation under long-term conditions while maintaining cost control.

Encouraged by the proven results at the Japan plant, the client decided to extend the same drying technology to its Vietnam facility, planning the installation of a second infrared drum dryer. This expansion not only confirms the equipment’s readiness for industrial-scale production but also highlights the solution’s engineering value as a scalable and cross-border replicable drying model.