About Us

Shanghai Zhengyi Machinery Engineering Technology Manufacturing Co., Ltd.

Company Introduce

Founded in Shanghai Songjiang Industrial Park in 1997.

Professional research and development and manufacture of pellet machine ring die, roller and pellet machine related accessories.

Industry advanced processing equipment, industry leading equipment scale.

First - class ring die design technology and advanced processing technology.

Our Production

Pellet Mill Ring Die

Roller Shell Assembly

Crumber Roller

Other Spare Parts

Single Shaft Mixer

Pulverizer

Wide Type Hammer Mill

Series Contioner

Ring die Row material

Automatic Packaging Machine

Parts of Production Line

Rough Processing

Parts of Production Line

Pellet mill

Finished Ring Die

Ultrasonic Cleaning

Vacuum Heat Treatment

Precision Machining

Tempering

Main Processing Equipment

CNC gundrill machine

Quantity: 20 sets

Shorter lead time

More stable processing

Drilling Tool

High Precision

High Efficiency

Less Blind Holes

High surface finishes

Vacuum Heat Treatment

Quantity: 3 Sets

Hardness: Hrc52~55

Hardness D-value: ≤hrc1.5

Defromation: ≤0.8mm

Temper Furnance: 2 Sets

CNC Machining Center

Vacuum Heat Treatment Furnace

CNC Vertical Turning

We have more than 2000 pieces of blank ring die in stock, covering all the ring die models in the group. Through high safety stock, we can reduce the blank ring die purchasing cycle, so as to ensure the supply capacity and delivery time of all group customers.

Quality Advantage

We Insist On Quality First

Metal Spectrum Analyzer

Leeb Hardness Tester

Metal Crystal Microscope

Ultrasonic Flaw Detector

Using ultrasonic flaw detector to check the flaw inside the row material.

Grinding Wheel

Fine Grinding

Confirm the Roughness

Liquid of Eroding

Mic taking Sample

The Result Analyzed by Software

Using SJ210 Roughness tester to check the roughness of holes inside surface

ZHENG YI HOLES ROUGHNESS STANDARD
Hole Diameter	Ra (Max)	Hole Diameter	Ra (Max)
＜3	1.2	6.1~8	2.4
3.1~4.5	1.6	8.1~10	2.8
4.6~6	2.0	≥10	3.2