High Temperature Resistant Single Screw Barrel

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.

High Temperature Resistant Single Screw Barrel

A high-temperature resistant single-screw barrel is a core component of single-screw extruders, specifically designed to withstand extreme heating environments (usually above 300°C, even up to 500°C for special needs) while maintaining stable material conveying and plasticization performance. It is mainly used for processing high-temperature resistant raw materials that are difficult to plasticize.

Key Characteristics of High-Temperature Resistant Single-Screw Barrels

Superior High-Temperature Resistance: Made of high-performance alloys (such as 38CrMoAlA, H13 hot work die steel, or nickel-based superalloys). These materials can resist oxidation, deformation, and creep under long-term high-temperature conditions, avoiding barrel wear or cracking caused by high heat.

Enhanced Wear Resistance: The inner wall of the barrel is usually treated with surface hardening technologies (like nitriding, laser cladding, or chromium plating). This not only improves its resistance to abrasion from high-temperature molten materials (especially filled plastics) but also extends the component’s service life.

Precise Temperature Control Compatibility: Equipped with optimized heating and cooling channel designs (e.g., multi-zone segmented heating). This ensures uniform temperature distribution inside the barrel, preventing local overheating that could damage raw materials or the barrel itself.

Stable Material Conveying: The internal screw groove (flight) structure is precisely machined. Even at high temperatures, it can maintain stable spiral conveying performance, avoiding material slippage or uneven plasticization caused by thermal expansion of the barrel.

Key Selection Criteria

When choosing a high-temperature resistant single-screw barrel, focus on the following core factors:

Material of the Barrel: Prioritize alloys with proven high-temperature performance (e.g., H13 steel for 300-400°C use, nickel-based alloys for temperatures above 400°C) to match the melting temperature of the processed raw materials.

Surface Treatment Process: Select appropriate hardening treatments based on raw material abrasiveness. For example, laser cladding is more suitable for highly abrasive filled materials than traditional nitriding.

Dimensional Matching: Ensure the barrel’s inner diameter, length-to-diameter ratio (L/D), and screw groove depth match the extruder’s screw and the target product (e.g., thicker walls for high-temperature pipes require larger barrel diameters).

Temperature Control Configuration: Confirm that the barrel supports multi-zone heating and cooling systems. This is critical for processing heat-sensitive high-temperature materials (to avoid overheating

decomposition).

Technical parameter 

Applications of  high temperature resistant plastics

It is mainly used for processing high-temperature resistant polymers that require high melting temperatures. Common application fields include:

Processing of High-Temperature Resistant Plastics: Such as PEEK, PPS and PI. These materials need melting temperatures above 300°C, and ordinary barrels cannot withstand such high heat.

Filled/Reinforced Material Extrusion: For example, glass fiber-reinforced plastics (FRP) or mineral-filled polymers. The high-temperature barrel can resist abrasion from hard fillers while ensuring full plasticization of the material.

Special Industrial Product Manufacturing: Including high-temperature resistant pipes (for automotive engine oil pipelines), aerospace-grade plastic parts, and high-temperature electrical insulation components. These products require the barrel to maintain stability during long-term high-temperature operation.