Ruian yumin machine screw co., ltd is a factory specialized in making screw barrel, gearbox ZLYJ series, t die, filter and extruder machine. Founded in 1988, it has become the biggest supplier of main parts in Ruian city which is basement for plastic machine.

Main technical parameter
Material: 38CrMoAIA 40CrMo 42CrMo high quality alloy steel
Technology: Nitriding treatment, alloy coating spraying heating treating, screw fully hardening.
Depth of nitrition layer: 0.5-0.8mm
Nitriding treatment surface hardness: HV>=900-1000
Fragility of nitrition: Less and grade 1
Surface roughness: Ra 0.4um
Streightness of screw: 0.015mm
Surface of hardness of nitrated Cr Coating layer: >=950HV
Hardness of Cr coating layer: HRC55-62
Thickness of alloy plating: 0.03-0.08mm


Technological Process:

Blanking, Rough Machining, Quenching & Tempering, Semi Finishing Machining, Finished Product, Detecting Nitring/Alloy Processed, Finish Machining


Packing for Stainless steel screw and barrel

1) Wooden case package
2) Plastic film package
3) Suitable to transportation
4) As buyer request
5) One piece into one package



After-Sales Service
1. If the after-sale problems we will reply you in time of after-sales request.
2. We have a large number of professional and technical personnel, engaged in equipment design and development work, has a wealth of practical experience. Can provide you with the best after-sales service.



FAQ
What are we? -We are factory, with license of import and export goods by ourself.
How to get to us? The nearest airport is Wenzhou airport, and the nearest train station is Ruian station.
How do we control the quality of screw barrel? We have professional engineer and staffs to check every detail and dimensions from the raw materail, nitrding treatment and super grinding. We do the crucial nitriding treatment by ourself,

Dear customer, if you already have suppliers or are looking forsuppliers, have a try to believe us, we are sincerely welcome you and want to cooperate with you.