Planetary-roller-screws
New Favorite in the Injection Molding Industry
Planetary Roller Screws Empowering the Upgrade of the Injection Molding Industry
# 2025
Endi Transmission
NEW
#01 Planetary Roller Screws
– A New Engine Towards Precision and Efficiency –
As the manufacturing industry increasingly demands precision injection molded products, the accuracy and efficiency of traditional injection molding equipment can no longer meet the high requirements of modern production.
Planetary roller screws, as precision transmission components that convert rotary motion into linear motion, are becoming the “heart” of high-end injection molding machines, empowering the transformation and upgrading of the rubber and plastic industry.
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Bringing
Significant
Performance Improvements
Data shows that by 2024, the market size of injection molding machines in China will reach 32 billion yuan, with high-end models accounting for 45%, while the penetration rate of planetary roller screws is growing at a rate of 12% per year.
#Why Have Planetary Roller Screws Become the New Favorite in the Injection Molding Industry?
Planetary roller screws have significant advantages over traditional roller screws: improved load capacity, extended product lifespan, and the ability to maintain extremely high precision under high load conditions.
These characteristics make planetary roller screws particularly suitable for high-pressure injection molding applications.
Currently, injection units of all-electric injection molding machines below 300 tons generally adopt a “single servo motor + synchronous belt + ball screw” drive method.
For large all-electric injection molding machines above 300 tons, the fatigue life of traditional ball screws cannot meet the design requirements (50,000 hours). In contrast, planetary roller screws, with their excellent mechanical properties, can easily handle high injection pressure conditions.
#02 Planetary Roller Screws
– Technology Driving the Transformation of Injection Molding Processes –
The application technology of planetary roller screws in the injection molding field has been continuously innovating over the past five years.
In 2022, the structure of the injection unit of all-electric injection molding machines based on planetary roller screws was designed and analyzed, providing a new solution for injection production under high injection pressure conditions.
By 2025, a plastics company in Changzhou successfully developed a precision injection molding solution using PEEK reverse planetary roller screws, effectively solving the challenges of complex structure forming and precision control.
Through innovative mold design, precise temperature control injection molding processes, and comprehensive quality control, it has successfully achieved a precision requirement of ±0.01mm after part forming, with mechanical properties fully meeting the transmission standards for robots.
#03 Planetary Roller Screws
– Significant Cost Reduction and Efficiency Improvement –
The economic benefits of planetary roller screws in injection applications are outstanding. Compared to the single-piece machining of metal planetary roller screws, the PEEK precision injection molding solution can increase material utilization by over 30%, significantly reducing the unit cost of parts through batch injection molding.
Currently, many injection molding equipment manufacturers are actively laying out related technologies. Among them, Yizhiming Company obtained the invention patent authorization for “Ball Screws and Injection Molding Machines” in May 2025, enhancing the load capacity of the screw shaft in a single direction.
According to predictions from the Huajing Industry Research Institute, by 2025, the market size of planetary roller screws in China will reach 1.83 billion yuan, with the rubber and plastic industry accounting for 28%, becoming the second largest application scenario after humanoid robots.
#04 Planetary Roller Screws
– The “Three Transformations” Trend in Injection Molding –
Part 01
Intelligent Integration: Planetary roller screws integrated with pressure sensors and AI algorithms can adjust the injection pressure curve in real-time. Some experimental data shows that the defect rate of product flash edges has been reduced by 67%;
Part 02
Miniaturization Breakthrough: The Zhejiang Wuzhou New Spring Group has developed a micro planetary roller screw (diameter 2.8mm) for dexterous hands, which has been applied in the micro-hole injection molding of medical-grade silicone nipples;
Part 03
Green Transformation: Planetary roller screws made from recycled alloy steel and dry grinding processes have reduced carbon emissions by 35% compared to traditional products, complying with EU carbon tariff policy requirements.
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From humanoid robot joints to precision optical components, planetary roller screws are reshaping the manufacturing genes of the rubber and plastic industry as the “core of precision transmission”.
Planetary roller screw technology is reshaping the future of rubber and plastic injection molding and driving the entire rubber and plastic industry towards a more precise, efficient, and environmentally friendly direction.
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Endi (Shenyang) Transmission Equipment Co., Ltd.