20+ Years Focus on EPE Screws & Barrels One-Stop Supplier
Precision Quality Service Value
Products made by our engineered EPE foaming screws achieve the lowest grammage across the industry.
The product utilizes premium brand special steel: 38CrMoAlA
Precision Quality Service Value
It undergoes multiple processes including quenching and tempering, quality inspection, precision machining, nitriding, fine grinding, and polishing.
We consistently adhere to the principle of “Quality First, Reputation Paramount.”
Precision Quality Service Value
We uphold the business philosophy that “Reputation is Gold, Integrity is the Foundation.”
Precision.
Quality Service
partnership
Expertise Trust Growth
ZHOUSHAN DONGYU PLASTICS & MECHANICAL CO., LTD. is located in Dinghai District, Zhoushan City, Zhejiang Province, the largest production base for screws and barrels in China. It is adjacent to Ningbo Beilun Port and borders the Shanghai Industrial Zone. It is a professional enterprise engaged in R&D, design and manufacturing of EPE screws and barrels. Its excellent quality and reputation come from more than 20 years of dedication and efforts. The barrels and screws it produces have long been supporting components for many well-known domestic and foreign injection molding machine manufacturers, and it has been repeatedly rated as an excellent supplier.
View MoreWe build our foundation on precision craftsmanship
and pursue growth through dedicated service.
Date of Establishment
China's largest screw and barrel production base
Excellent quality and reputation
more than 20 years of dedication and effort
PRODUCT CATEGORY
Core Overview of EPE Foaming Extrusion Screws & Barrels
Base material is high-strength alloy steel (Dongyu selects 38CrMoAlA special steel),
treated with quenching and tempering, heat treatment, nitriding, or coating to
enhance wear resistance and corrosion resistance
The substrate is made of high-strength alloy steel (Dongyu selects 38CrMoAlA special
steel), which undergoes quenching and tempering, heat treatment, nitriding,
or coating processes to enhance wear resistance and corrosion resistance.
Product List
The company's screws and barrels have long provided supporting components for numerous renowned domestic and international injection molding machine manufacturers, and have been repeatedly recognized as an outstanding supplier.
Nitriding Heat Treatment
Heat Treatment
Technical Advantages
Through rigorous scientific tempering and nitriding processes, it delivers technical advantages including high wear resistance, strong corrosion resistance, and extended service
Technical Advantages
专注于技术创新推动行业发展，助力能源革命
并使我们更接近实现零碳地球的目标
Nitriding Heat Treatment
Heat Treatment
Nitriding Heat Treatment
Heat Treatment
Technical Support
Empowering industrial components with a complete lifecycle solution: design, advanced manufacturing, bimetallic alloy innovation, and reliable repair services.
DONGYU PLASTIC
BLOG
We stay closely attuned to the newest developments and cutting-edge trends across the industry.
View More
Jan 20,2026
Smart Upgrade Revamps Screw & Barrel Industry
IoT and digital tech integrate into production, improving efficiency, reducing downtime, and enhancing flexible manufacturing capacity.
Jan 20,2026
High-End Screw & Barrel Tech Boosts Localization
Advanced materials and precision processes elevate product performance, cutting import reliance and supporting high-end industry needs.
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ZHOUSHAN DONGYU PLASTICS & MECHANICAL CO., LTD
Over the years, guided by the principle of "Quality craftsmanship, sincere service", we pursue high-end product development, offer mapping, design, custom manufacturing and renovation services, and seek mutual growth with customers through quality and efficiency.