We design, produce and repair feed screws for extrusion process and injection process.
Our technical department provides on site measurement service home and abroad. If you want to replace your existing screw or improve its performances, we will send engineers to your factory to check and do the measurement and provide troubleshooting.
Based on the processed material and products, we provide different types of screws to ensure the melting quality and its service time
● Metering screws
● Barrier screw
● Mixing screw
● Vented screws
Besides the design, the steel and surface treatment is another factor to get a quality screw.
The base steel for our screws is normally 38CrMoAla (DIN 1.8509), 34CrAlNi7(DIN 1.8550), 42CrMo (ANSI 4140), SKD61 etc.
Nitrided screws are widely requested for general purpose. After Nitriding treatment, the screws reach a hardness of ≧ 900HV. For getting a screw which is more wear resistant, especially for processing materials with fillers CaCO3, glass fiber, Mg(OH)2 or wooden powder, bimetallic screws (hardfaced screws) are a better option.
Several types of alloy are available for bimetallic screws to meet customers’ different needs. The most common types are as following
● Ni60
● Colmonoy 56
● Tungsten-Carbide
When making bimetallic screws, in addition to the Nitrided treatment, we do hard facing on screw flights through plasma transferred arc (PTA). We started to produce bimetallic screws decades ago. The way for producing bimetallic screws changes from by manual to by PTA machine. With years of improving and developing, we have our own way to control the temperature and cool down the bimetallic screws slowly and smoothly. Thus, small cracks can be more avoided when other suppliers failed to do so.
Most Frequently Produced Screws Include:
Conical Twin Screws: ￠35/80 ~￠110/220
Parallel Twin Screws: ￠45/2 ~￠200/2
Extrusion SingleScrews: ￠16 ~￠300
Injection Single Screws: ￠16 ~￠220
Pinned Rubber Screws: ￠75 ~￠200
Cold/Hot Rubber Feedscrews: ￠65 ~￠650
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