In the design and manufacture of screw barrel for extrusion of blow molding, adjustments and optimizations are essential to match the characteristics of different plastic raw materials. These improvements ensure that the equipment runs efficiently, stably, and delivers high-quality products.
One key area of optimization is screw geometry. Parameters such as diameter, pitch, helix angle, and the length of functional sections influence melting, mixing, and conveying performance. By analyzing the melting temperature and viscosity of raw materials, engineers calculate and verify the best parameter combinations. This ensures complete melting and uniform mixing of plastics inside the screw barrel.
Material selection is another critical factor. For highly corrosive raw materials like PVC, barrels must be made of alloy steels with excellent corrosion resistance. Surface treatments such as nitriding or bimetallic coatings strengthen the inner wall against wear and chemical attack. At the same time, design adjustments can minimize contact between raw materials and the barrel surface, further reducing corrosion risks.
Process requirements also drive equipment optimization. For applications demanding precise extrusion control, high-precision metering devices and advanced control systems are integrated. When high-temperature extrusion is needed, heating systems and insulation structures are upgraded to improve efficiency and maintain stable temperature uniformity.
Through systematic design adjustments, material innovation, and process optimization, Intai Screw ensures that screw barrels for blow molding extrusion achieve excellent durability, stable performance, and superior product quality.
