Since 2016, We started to customize the 40/50/60 screw barrels for LEISTRITZ company, and so far they have purchased thousands of products.Their headquarter is in Germany, and the new factory is in Taicang, China. The business is increasing, and we hope to have more orders in the future,the future is yours!

NANJING ZHITIAN have two factory.ZHITIAN JIDIAN and ZHITIAN XINYE.

We have a professional team equipped with high grade precision machinery such as digital boring mill, numerically controlled fraise machine, numerically controlled flat-stone mill as well as a processing center.

1. Quick and highly precise.

2. Digital machines with multi-function to enhance device availability.

3. Process at front platform while programming at back platform.

4. Securing higher work hardness and smaller surface roughness by introducing technology of self-adapted control; Meanwhile, the life of cutters and producing efficiency are highly improved.

5. Breakdown self-testing and self-repairing function is used.

6. Modularization, standardization and uniform for hardware structure are adapted.

We have perfect testing system with full precision testing equipments,and a professional team of quality engineering with sole-duty persons well trained inspection.

1.Precision Test

Marl height indicator,the precision can be up to 0.1μm,which is 200 times of precision by usual manual test.

2.Hardness Test

Testing system is applicable for hardness test of products manufactured from various materials,which the error of indication is less than positive and negative 6HLD,which repeatability error is less than 6HLD.

3.Pressure Resistance Test

Guarantee tightness of barrel’s water cycle system.

4.Flaw Detection

Comprehensive product testing,ensure products zero defect,zero damage.

5.Gearbox Debug Platform

Test products run under simulated case.

We have a professional technical team,independent R&D of gearbox and barrel.

Focus on twin screw extruder parts

​I. Team Scale & Organizational Structure​

• ​Total Workforce: 130+ employees (as of 2024)
• ​Core Departments:
  • R&D Center
  • Production Center
  • Sales & Marketing Department
  • Quality Control Department
• ​Reporting Structure: R&D and Production teams report directly to the General Manager, ensuring efficient implementation of technical decisions.

​II. Core Teams: Functions & Competitive Advantages​

​1. R&D Team​

​Team Composition:

• Material Scientists (specializing in metal alloys)
• Mechanical Design Engineers (barrels, gearboxes, screw elements, and shafts)
• Process Engineers (laser cladding, hot-press sintering)

​Technical Highlights:

• Developed ​51 patented technologies, including ​high-torque gearboxes​ (specific torque: 18 Nm/cm³) and ​cobalt-based alloy Cold Isostatic Pressing (CIP)​​ processes.
• Collaborated with research institutes such as ​Nanjing University of Science and Technology​ to advance industry standards.

​2. Production Team​

​Precision Machining Workshop:

• CNC machining centers
• CNC boring machines
• CNC deep-hole drilling machines
• Gear grinding machines
• Welding robots

​Alloy Forming Workshop:

• Hot-press sintering furnaces
• CIP machines
• Laser cladding systems

​3. Sales & Marketing Team​

Key Service: Technical sales support with ​engineer participation in solution design.

​4. Quality Control Team​

​Testing Capabilities:

• Coordinate measuring machines (CMMs)
• Metallurgical microscopes (material phase analysis)
• 48-hour full-load testing​ for all gearboxes (simulating real-world operating conditions).

​Certifications:

• ISO 9001:2015 Quality Management System certification.

​Key Features​

• ​R&D-Driven Innovation: 25% of the workforce dedicated to R&D, ensuring cutting-edge solutions.
• ​Precision Manufacturing: Advanced CNC and laser cladding technologies guarantee micron-level accuracy.
• ​Global Compliance: ISO-certified processes meet international quality standards.

All ZT keep pay attention to every step of the details, we are looking forward to the forge ahead together with you!

Twin-screw extruder parts performance optimization

1. Founding & Early Stage (2006)​​

Nanjing Zhitian Mechanical and Electrical Co., Ltd. was established in 2006, headquartered in Jiangning District, Nanjing City, Jiangsu Province. The company initially focused on the ​R&D and production of twin screw extruder components, laying the foundation for its technical expertise in alloy materials and precision machining.

​2. Technological Accumulation & Capacity Expansion (2006–2018)​​

• ​2008: Became the ​first manufacturer​ in China to adopt horizontal machining centers for specialized production of ​twin screw barrels​ (cylinder components), enhancing production efficiency and precision.
• ​2011: Successfully developed and produced ​self-designed twin screw extruder gearboxes, marking a breakthrough in core component localization.
• ​2013: Achieved a milestone by launching ​high-torque gearboxes​ with a specific torque of ​13 Nm/cm³, catering to demanding industrial applications.
• ​2018: Expanded the Nanjing production base to increase output capacity, preparing for large-scale international orders.

​3. Brand Elevation & Technological Breakthroughs (2019–2025)​​

• ​2020: Pioneered ​hot-pressed sintered nickel-based alloy liner​ for barrels, significantly improving wear resistance in high-temperature environments.
• ​2021: Introduced ​ultra-high-torque gearboxes​ with a specific torque of ​18 Nm/cm³​ (e.g., ZT75E series), setting new benchmarks for energy efficiency in battery and plastic industries.
• ​2022: Established ​Zhitian New Materials Base in Anhui Province, forming dual production hubs (Nanjing and Anhui) with a total area exceeding ​13,000 m²​ and a workforce of over 100 employees.
• ​2023: Recognized as a ​​"Jiangsu Provincial Specialized, Sophisticated, and Innovative SME"​, highlighting its innovation capabilities in high-end manufacturing.
• ​2024: Launched ​nickel-based laser-clad barrels​ (e.g., ZT715/ZT735 alloys), attracting global clients with their corrosion resistance and extended lifespan.
• ​2025: Developed ​cold isostatic pressed cobalt-based alloy sleeves​ (e.g., ZT818), combining 18% cobalt and 82% tungsten carbide for unparalleled hardness (HRC 68–69) and impact toughness, widely adopted in lithium battery extrusion systems.

​Key Competitive Advantages​

• ​Technical Leadership: 45+ patents in alloy materials and gearbox design.
• ​Global Reach: Products exported to Europe, Southeast Asia, and South America, supported by localized repair centers.
• ​Sustainability: Component regeneration services (e.g., laser cladding) and ESG-aligned practices.

For detailed product specifications or collaboration inquiries, visit www.njzhitian.com or contact zt@njzhitian.com

Continuous Technological Advancement & Customer Recognition​

​Equipment Upgrades​

​Customer Validation​
"Over 80% of our clients from plastics, battery, and feed industries have placed ​repeat orders for 5+ years, a testament to the reliability and performance of our twin screw components."

​Key Highlights​

• Precision-Centric: 0.02mm tolerance control enabled by 3D detectors and CNC automation.
• Material Innovation: Laser-clad cobalt/nickel alloys extend barrel lifespan by 3–5x vs. conventional materials.
• ​Global Trust: 200+ enterprises worldwide rely on our gearboxes, screw barrels, screw elements, and refurbishment services.