Screw & Barrel for Extruder
Diameter of screw: φ15-φ500
L/D ratio: 15-55
Hardness after hardening and tempering: HB280-320
Nitriding hardness: 950-1100HV
Nitrided layer depth: 0.5-0.8mm
Nitrided brittleness: Less than grade 2
Surface roughness: Ra0.4
Linearity of screw: 0.015mm/m
Bimetallic layer depth: ≥3mm
Bimetallic hardness: HRC60-72
Hard-chrome plating hardness after nitriding: ≥950HV
Chrome-plating layer depth: 0.025~0.10mm
High-quality alloy steel
38CrMoAlA (JIS SACM645)
42CrMo (AISI 4140)
Hard chrome plating
Alloy powder spray welding
To place an order, please fellow the steps below.
1. Inquiry and Quotation. Please tell us the information of screw and barrel you want, Model No. of extruder, diameter of screw, length of screw(L/D ratio of screw) etc.According to your request, we send a quotation to you, quotation include the price, price term(FOB NINGBO or SHANGHAI, or your demands), technial parameter of screw and barrel, delivery time, etc.
2. Advance payment. After quotation confirmed. We send performa invoice to you, you can find our bank account information in performa invoice.
Now, you can transfer the advance payment to us by this account.
3. Drawing. We will send drawings of screw and barrel to you for your confirmation, we have drawings for almost all famous injection molding machine.
If we do not have drawings of your screw and barre, we will to design and draw the drawings. Need you offer the connection dimension of screw and barrel.If you have drawings, and want to make screw and barrel according to your drawing, it’s also ok.
4. Production. After drawing confirmed, we start to make screw and barrel according to the drawings you confirmed. production time: 18 to 30 days.
5. Balance payment and delivery. When screw and barrel finished, we will send photos of screw and barrel to you, and sending Commercial Invoice to you at the same.After we received the balance payment, we will contact forwarding company and deliver cargos.