Screw barrel process flow

Screw and Barrel Machining Process at HUACHEN Screw Barrel

At HUACHEN Screw Barrel, we pride ourselves on our meticulous machining processes and the superior quality of our screw and barrel components. Our dedication to precision, material selection, and advanced manufacturing techniques sets us apart from our competitors, ensuring that our customers receive the best products on the market.

What Sets HUACHEN Screw Barrel Apart

1. Strict Material Selection

• -We exclusively use high-quality nitrided steel, specifically 38CrMoAlA, SKD11 (equivalent to D2), and SKD61 (equivalent to H13). This choice of material ensures exceptional wear resistance, high surface hardness, and superior mechanical properties.
• -Unlike some competitors who may use inferior materials like 40Cr, our commitment to premium materials guarantees the longevity and reliability of our screw barrels.

2. Comprehensive Aging Treatment

• –Artificial Aging Treatment: Our nitrided steel undergoes heating to a higher temperature, followed by a short aging period to stabilize its properties.
• –Natural Aging Treatment: For longer stability, our nitrided steel is also aged at room temperature over an extended period.
• –Purpose: These aging treatments eliminate internal stress, stabilize the steel’s structure and size, and enhance its mechanical properties. This process ensures that our screw barrels maintain their shape and performance over long-term use.

3. Precise Machining Process

• –Our standard processing time is 30 to 45 days, allowing us to perform all necessary steps with precision.
• –Key Steps in Our Machining Process:
• –Rough Machining: Initial shaping of the screw and barrel.
• –Tempering Heat Treatment: Includes reheating nitrided steel to 100-150°C between low-temperature tempering (150-250°C) and finishing, held for 5-20 hours to stabilize quality.
• –Finishing and Stress Relief: Ensures the smoothness and dimensional accuracy of the components.
• –Nitriding: Enhances surface hardness to HV≥1000 and improves wear resistance.
• –Fine Grinding and Assembly: Final steps to ensure perfect fit and performance.

4. Advanced Technology Integration

• –Bimetallic Alloy Surfacing: Plasma surfacing of vulnerable areas with nickel-based, cobalt-based, molybdenum-based, WC-Co hard alloys, and ceramic alloys to enhance durability.
• –SKD Sleeve or Bush Inserts: Conical twin screw barrels with SKD11 sleeves are fitted to resist corrosion and wear, particularly effective for producing high-filled PVC products.

5. Quality Assurance and Innovation

• -At HUACHEN Screw Barrel, we ensure that every product meets our rigorous quality standards. Our comprehensive quality control processes prevent any shortcuts that might compromise the integrity of the screw barrels.
• -We continually invest in research and development to innovate and improve our machining processes, keeping us ahead of the competition.

Why Choose HUACHEN Screw Barrel?

• –Durability: Our screw barrels are built to withstand the most demanding applications, offering extended service life and consistent performance.
• –Precision: Advanced machining techniques and strict quality controls ensure that each screw and barrel fits perfectly and operates smoothly.
• –Customization: We tailor our products to meet specific customer requirements, ensuring optimal performance for various applications, including PVC, PE, and PP extrusion.
• –Reliability: Our rigorous aging treatments and material selection processes ensure that our products are reliable and maintain their properties over time.

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