Ruian yumin machine screw co., ltd is a factory specialized in making screw barrel, gearbox, t die, filter and recycling machine. With the history over 24 years, it's the bigges supplier of main parts of plastic machines in Ruian city, covering land of 15000 square maters, owing 2 factories, 4 worhshops. There are some computers controlled CNC milling machines in FANUK series which is the most advanced equipment professionally making screw barrel, deep drilling machine which is 100%ensure the straightness of barrel inside in long length, milling machines in 8meters and 10 meters, 10 polishing machines, 20 lathes, 10 drilling machines, and other machines. In the past years, it has exported a lot to the followings countries and zones, such as Russia, Pakistan, Serbia, Romania, Egypt, Algeria, Morocco, Brazil, Mexico, Argentina, South-east zone of Asia and Middle-east zone. The goods are welcome a lot with our clients. Welcome you to visit and cooperate.
1. Size:
Screw diameter: ø 20-ø 500mm
Maximum screw length: 10000mm
Barrel inner bore diameter: ø 500mm
2. Material
38CrMoAlA and High quality alloy steel
3. Technology: Nitriding treatment
Alloy coating sparying
Heating treatment
Screw fully hardening
4. Specification: Depth of nitrition layer 0.5-0.8mm
Nitriding treatment, surface hardness: HV≥ 900-1000
Fragility of nitrition: Less than grade 1
Surface roughtness: Ra 0.4um
Surface of hardness of nitrated Cr coating layer ≥ 950HV
Thickness of Cr coating layer: 0.03-0.08mm
5. Used for granulation, PP, PE, PA, PC, ABS, AS etc
We can manufacture various kinds of screw barrels according to the customer's requirement.
| Product |
The best single screw barrel for extruder in ruian |
| Material |
38 CrMoAlA(JIS SACM645); 42 CrMo(JIS SCM440) |
| Hardness of nitrogen treatment |
HV900°~1100° |
| Tempering hardeness |
HB240 ° ~280° |
| Depth of nitrogen layer: |
0.6~0.8mm |
| Nitrided Brittleness |
above 1 stage |
| Surface Roughness |
Ra0.4 um |
| Screw straightness |
0.015mm |
| Hardess of surface chromium-plating after Nitriding |
HV≥950HV |
| Chromium plating Depth |
0.025-0.085mm |
| Alloy Depth |
2.5mm-4mm |
| Alloy hardness |
HRC62°~72° |
| Heating-treatment |
nitrogen ,electroplated hard -chrome finish,high frequency quenching |
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