Focus on the 18th China Wood Plastics Summit Forum: Zhoushan Nanhaiya appeared at the conference as one of China's largest suppliers of conical twin-screw barrels for WPC.

On September 2, 2025, the 18th China Wood Plastic Summit Forum, themed "20 Years Witnessing the Great Practice of the 'Two Mountains' Initiative, Environmentally Friendly Wood Plastics Pioneering New Paths for Ecological Economy," concluded with great success in Huzhou, Zhejiang. Bringing together industry experts, business leaders, and representatives from research institutions, this grand event engaged in in-depth discussions on technological breakthroughs, market trends, and sustainable development paths. Zhoushan Nanhaiya Plastic Machinery Co., Ltd., a veteran manufacturer of wood plastic equipment, was invited to participate, and its core product, the conical twin-screw barrel for wood plastics, garnered widespread attention.

Against the backdrop of the growing popularity of green and low-carbon concepts and the continued strengthening of policies supporting the wood plastics industry, this forum has become a core platform for technical exchange within the industry. Nanhaiya's participation perfectly aligned with the forum's core theme of "Technological Innovation Driving Ecological Economy." Nanhaiya's conical twin-screw barrels are manufactured from 38CrMoAl alloy steel and undergo precision processes such as tempering, characterization, and surface nitriding. The vulnerable section of the barrel discharge port is fully coated with carbide, achieving an internal hardness of 62HRC and a 2.5-3mm alloy layer depth. Tungsten alloy is also added to enhance wear resistance, significantly extending the service life compared to conventional products.

During the exhibition, the Nanhaiya team engaged in in-depth discussions with participating companies on key industry issues such as improving WPC production efficiency and optimizing energy consumption. A high-quality conical twin-screw barrel can comprehensively improve WPC production, from raw material processing and product quality to production stability, and is a key component for ensuring the quality and efficiency of WPC products. The precise clearance between Nanhaiya's barrels and the conical screw ensures smooth screw rotation while preventing unplasticized raw materials from escaping through the gap, ensuring full melt mixing and improving raw material utilization. Nanhaiya's barrels utilize a multi-stage heating and cooling system with strategically divided heating zones (e.g., feeding, compression, and homogenization). This allows precise temperature control of each section based on the plasticization requirements of the WPC raw material, preventing localized overheating or overheating. Some barrels also feature exhaust channels that, in conjunction with the screw's exhaust section, effectively remove moisture from the wood powder and gases generated by raw material heating. This reduces pressure fluctuations within the barrel, prevents equipment failures caused by excessive pressure, and extends the life of the entire production line. With its core advantages of high precision and high wear resistance, these equipment provides key support for the expansion of wood-plastic composite materials from outdoor flooring to diverse applications such as architectural decoration and furniture manufacturing, aligning closely with the forum's discussion of the "broadening of wood-plastic application scenarios." As a key player in East China's wood-plastic equipment industry chain, Nanhaiya's presence not only showcased its technological strength but also provided professional solutions to support the industry's high-quality development.

During the award ceremony of the forum, Zhoushan Nanhaiya was awarded the title of outstanding member unit.

Nanhaiya's conical twin-screw barrels for wood-plastic composites utilize high-precision processing and wear-resistant and corrosion-resistant materials. These barrels are effectively adapted to varying wood-plastic raw material ratios, improving extrusion efficiency while reducing energy consumption. This helps downstream companies optimize production processes and control costs. Currently, they are being steadily adopted by numerous wood-plastic product manufacturers.

At the forum, representatives from numerous wood-plastic production companies engaged in in-depth discussions with staff regarding equipment specifications and customization requirements, with some expressing interest in further collaboration. A representative from Nanhaiya stated that this conference not only showcased the company's technological strength but also provided valuable insights for future product iterations and technological innovations through exchanges with industry peers. The company will continue to deepen its presence in the wood-plastic machinery sector, contributing to the industry's greener and more efficient development with superior equipment.