FAQ
Q1. What's bimetallic screw barrel?
A: Bimetallic is also called dual-metal, It's by spraying a higher quality alloy on the surface of base material. The hardness and abrasive-resistant performance will be better, and can achieve longer lifespan. While the price wont be that high as full-hardened screw barrel.
Q2. What kind of bimetallic alloy you are using for production?
A: According to different usage, the choose for alloy is different, some require for abrasion-resistant while some require for corrsion-resistant. For standard, we have Fe-based, Ni-based, WC alloy etc for choice.
Q3. How long guarantee for bimetallic grade screw barrel?
A: The lifespan also depends on the using frequency and plastic running. If for virgin plastic without recycling, according to different alloy, can use at least 2 year. Higher bimetallic grade can achieve 4-5 years. If for recycling plastic, may be less.
Q4. What's the appliance for this grade of screw barrel?
A: Usually, bimetallic grade is more suitable for processing with bad plastic, such as recycling one, too much filler, such as CoCa3 and Glass Fiber. It's more abrasive-resistant than standard nitrided grade.
Q5. What's the thickness of bimetallic alloy and Hardness?
A: Thickness of bimetallic alloy will be range from 2-2.5mm according to different size of screw barrel. Hardness can reach up to HRC72. But usually will recommend hardness below 68HRC. or it may be a little fragile for the base material.
Tecnical Index
| Screw Processing Method | Full automatic alloy spraying (PTA) |
| Barrel Processing Method | Centrifugal Casting |
| Bimetallic alloy thickness | 2-2.5mm |
| Straightness | 0.005mm/m |
| Hardness | Available for different appliance |
Other Material Available
| JINYI | Chinese | Japan | America | German | Treatment | Hardness | Appliance |
| GB | JIS | AISI/SAE | DIN | ||||
| JYN1 | 38CrMoAl | SACM645 | 6470E | 41CrAlMo7 | Gas Nitrition | HV 950-1000 | Common Use |
| JYN2 | 40Cr | SCr440 | 5140 | 1.7035 | Chrome-plate | HRC 42-55 | |
| JYN3 | 42CrMo | SCM440 | 4140 | 1.7223 | Chrome-plate | HRC 48-58 | |
| JYN4 | 45# | S45C | 1045 | 1.1191 | Hardening | HRC 42-46 | |
| JYH5 | Cr12Mo1V | SKD11 | D2 | 1.2379 | Hardening | HRC 62-65 | |
| JYH6 | 4Cr5MoSiV1 | SKD61 | H13 | 1.2344 | Hardening | HRC 60-65 | |
| JYH7 | 9Cr18MoV | SUS440B | 440B | 1.4112 | Hardening | HRC 56-58 | |
| JYG1 | (Confidential) | <35% GF | |||||
| JYG2 | <40% GF | ||||||
| JYG3 | <40% GF | ||||||
| JYG4 | <45% GF | ||||||
| JYG5 | <50% GF | ||||||
| JYG6 | >50% GF | ||||||
| JYG7 | Optical Glass | ||||||
| JYG8 | >300℃ Temp. | ||||||
