CNC Machining
JINFENG uses in-house CNC machining for drawing-based manufacturing of pelletizing components.
Since 1993
About JINFENG
JINFENG's pelletizing component business began in 1993, when Shenyang Jinfeng Special Tools Co., Ltd. was founded jointly by the Institute of Metal Research of the Chinese Academy of Sciences and the Institute of Strength Physics and Materials Science of the Russian Academy of Sciences. Shenyang Jinfeng Special Equipment Co., Ltd., established in 2006, manufactures pelletizing die plates, complete pelletizer knives, and pelletizer cutter hubs under the JINFENG brand.
We work with drawings, samples, dimensions, equipment interfaces, polymer information, and operating conditions to assess each component requirement.
Focused on Pelletizing Components
JINFENG's product and service scope includes:
- Pelletizing die plates for underwater pelletizing systems
- Complete pelletizer knives ready for installation
- Customized pelletizer cutter hubs
- Die plate repair assessment and related repair operations
Review the Pelletizer Knives and Cutter Hub product scope for related supply and inquiry details.
Our supply experience includes applications involving PP, PE (HDPE, LDPE, LLDPE and full-density PE), EVA, POE, and EVOH, with most current die plate work for 300,000–600,000 t/a lines. Component requirements are defined around the customer's equipment and process information.
Company History
JINFENG started with cutting materials and moved into die plates as polyolefin lines grew larger.
- 1993Shenyang Jinfeng Special Tools Co., Ltd. founded by the Chinese Academy of Sciences Institute of Metal Research and the Russian Academy of Sciences Institute of Strength Physics and Materials Science.
- 1995–1997Cermet-insert composite pelletizer knife patented in China; the cermet pelletizer knife won a gold award at the 6th China New Technology and Products Expo.
- 2000–2003JINFENG's new plastic pelletizing die plate won a gold award at the China Patent Technology Industrialization conference and was named a National Key New Product.
- 2010200,000 t/a die plate started up successfully on the first domestically built 200,000 t/a extrusion pelletizing line in China.
- 2012Designed and built a 450,000 t/a PP die plate for Tianjin Sinopec SABIC, the largest die plate of its type at that time.
- 2023Φ1570 mm die plate for a 400,000 t/a full-density PE line at Lanzhou Petrochemical.
- 2024–2025Die plates delivered for export projects built to ASME BPVC Section VIII Division 1 requirements; die plate for a 500,000 t/a PE line with 7,584 die holes.
Research and Development
JINFENG has more than 1,000 m² of research and testing space and long-term technical cooperation with the Institute of Metal Research and the Shenyang Institute of Automation of the Chinese Academy of Sciences, Tsinghua University, Northeastern University, Beijing University of Chemical Technology, Shenyang University of Technology, Shenyang Ligong University, and the Institute of Strength Physics and Materials Science of the Russian Academy of Sciences.
Development work includes the company's own TiC-NiCr cermet for pelletizer knives and die plate hard faces, and thermal and melt-flow simulation with ANSYS Fluent to improve temperature uniformity across the die plate and prevent frozen holes. Die plates, knives and cutter hubs have also been developed for EVA, POE, and EVOH. In 2024–2025 JINFENG added high-precision CNC equipment and a photovoltaic power supply at its plant.
In-House Manufacturing Capabilities
JINFENG's manufacturing capabilities include:
- CNC machining, including a 2.5 m CNC gantry milling machine
- Five CNC double-head die-hole drilling machines
- 1.2 m and 1.8 m circular-table grinders, surface grinders, and CNC fine grinding
- Ten wire-cutting (EDM) machines
- 1.5 m and 1.7 m vacuum brazing furnaces and vacuum sintering furnaces
- Heat treatment
Rough machining is done on conventional machine tools for efficiency; finish machining is done on CNC equipment to hold precision. These processes support drawing-based custom manufacturing and evaluation of existing components. When a complete drawing is unavailable, photographs, dimensional information, and a physical sample can help establish the required interfaces.
Vacuum Brazing
JINFENG uses in-house vacuum brazing for applicable pelletizing component work.
Inspection Capabilities
JINFENG works to an ISO quality management system, from technical agreement and drawing confirmation through an in-process control plan, self-inspection and specialist inspection, to final product inspection. The inspection center includes a grade 00 granite surface plate, metallographic microscope, impact, tensile and bending testing machines, a handheld metal analyzer, an infrared carbon-sulfur analyzer, benchtop hardness testers, and a surface roughness tester.
Incoming forgings are checked for composition, dimensions, hardness and internal flaws. In-house inspection of finished parts includes dimensional inspection, hardness testing, die-hole inspection, surface inspection, heating-channel pressure and leak testing, and flaw detection of hard faces and brazed joints. The applicable inspection scope is selected according to the product drawing and order requirements.
Ultrasonic testing (UT) can be arranged through a qualified third-party inspection provider when required for a project.
From Existing Components to Customized Manufacturing
Many inquiries begin with an existing component that needs to be identified, replaced, or evaluated. JINFENG can assess customer drawings and dimensional information, or use a physical sample as the starting point when complete documentation is unavailable.
For die plates, the assessment considers the main dimensions, mounting interfaces, die-hole area, melt passages, heating-channel information, and cutting-side features shown on the drawing or sample. For pelletizer knives and cutter hubs, the focus includes mounting details, knife positions, shaft connection, and the relationship between the knives and die plate.
The resulting manufacturing scope is agreed around the component and the customer's order requirements.
Working with JINFENG
For a new component or replacement requirement, customers can provide:
- A drawing and revision
- Clear dimensions and mounting details
- Photos of the existing component
- Sample availability
- Equipment information for component identification
- Polymer and operating conditions
- Required quantity
- Inspection or documentation requirements
This information helps the technical team evaluate the component and prepare the quotation scope.
Company and Contact Information
Company: Shenyang Jinfeng Special Equipment Co., Ltd.
Address:
No. 29, Kaifa South 26th Road
Shenyang Economic and Technological Development Zone
Shenyang, Liaoning, China
Telephone: +86 24 8110 5220
Email: sales@dieplates.com
WhatsApp: +86 133 0983 7263
Affiliated company: Shenyang Jinfeng Special Tools Co., Ltd. — specialknife.com
Discuss Your Pelletizing Component Requirement
Send your drawing, sample details, or dimensional information to discuss a pelletizing die plate, pelletizer knife, cutter hub, or die plate repair requirement.