Bimetallic Conical Twin Screw

Zhoushan Nanhaiya is a leading manufacturer of screw barrel in China for more than 20 years. We provide one-stop solutions in the plastic-related fields for global enterprises. OEM ODM is supported.

Why choose Nanhaiya?

1. High-quality Raw Material

We use high quality raw materials which are directly purchased from steel mills,select the high-level steel, which, through forging and extrusion, achieves better density and toughness.

2. Advanced Bimetallic Craft

We use imported nickel-based alloy + tungsten alloy. The length of the alloy is over 400mm, and the depth is 2 - 3mm. Alloy hardness can reach HRC58-65. The alloy can be customized according to customers' requirements to achieve better wear and corrosion resistance, thus extending the service life of the screw and barrel.

3. Fast Delivery

For standard-type screws, we have established a standardized inventory system to achieve fast delivery within 24-48 hours; for customized products, we commit to a delivery cycle of 30-40 days. Customers can keep track of the real-time order progress through timely production status updates.

4. 24-hour After-sales Service

We provide full-life-cycle after-sales services, including installation guidance, troubleshooting, and regular maintenance recommendations. Our after-sales team offers 24-hour response to ensure prompt resolution of customer issues and minimize downtime losses to the greatest extent.

5. Excellent Cost-performance

For products of the same quality, we compete on price; for products at the same price, we excel in quality. Nanhaiya Screws boast ultimate cost-effectiveness, making them your ideal choice.

Bimetallic conical twin screw

The core advantages of bimetallic conical twin screws lie in their excellent wear and corrosion resistance, as well as their superior mixing and plasticizing capabilities for high-difficulty materials. Meanwhile, they are compatible with small and medium-sized extrusion equipment, making them the preferred components for processing high-fill and highly corrosive materials.

Their applications are concentrated in high-difficulty material processing scenarios, especially in fields with high requirements for screw wear resistance and mixing capacity:

Modified Plastic Processing

Such as glass fiber-reinforced PP/PA (materials for automotive parts) and mineral-filled PE/PVC (materials for pipes and profiles). It can solve the wear problem of screws caused by high-filled materials, while ensuring the uniform dispersion of reinforcing agents.

PVC and Corrosive Material Processing

Including PVC-U profiles, PVC-C water supply pipes, and fluoropolymer (e.g., PVDF) products. The bimetallic material can resist corrosion from hydrogen chloride generated by PVC decomposition, preventing screw rust from affecting product quality.

Masterbatch and Functional Masterbatch Manufacturing

Used for the extrusion granulation of high-concentration color masterbatches (pigment content > 30%), flame-retardant masterbatches, and antibacterial masterbatches. Its strong mixing capability ensures the uniform dispersion of functional additives, avoiding color spots or uneven performance in finished products.

Recycled Plastic Regeneration Processing

It handles waste plastics with high impurity content (such as crushed materials from home appliance casings and automotive recycled materials). The wear resistance of the bimetallic material can cope with wear caused by impurities, while improving the melt quality of recycled materials through efficient plasticization.

Technical parameter 

Specifications Of Conical Twin Screw And Barrel