How to ensure that the Screw Barrel for Extrusion of Blow Molding is suitable for various plastic materials?

When designing and manufacturing the Screw Barrel for Extrusion of Blow Molding, we must take into account a variety of factors to ensure that it can handle a variety of plastic materials and provide efficient melting and mixing performance. As a manufacturer, we have taken a series of measures to optimize the design of the screw and barrel so that it can perform well in different application scenarios.

According to the characteristics of different plastic materials, we have designed a variety of screw structures, including different spiral groove depths, angles and shapes. These designs help to uniformly mix and stably extrude the plastic melt. For high-viscosity plastic materials, we may use a larger spiral groove depth to reduce the resistance to melt flow and enhance the mixing effect. For low-viscosity plastics, the spiral groove of the screw may be shallower to avoid excessive shearing and unnecessary friction.

In the selection of materials for screws and barrels, we prefer high-wear-resistant, high-strength alloy steel or other high-performance materials that can withstand high-temperature and high-pressure working environments and maintain stable performance in long-term use. To enhance corrosion resistance and extend service life, we may also use chrome plating or nitriding, which can effectively resist corrosion and wear of plastic melts and ensure the long-term reliability of screws and barrels.

To optimize melting and mixing performance, we precisely control the spiral groove size and distribution of the screw during the manufacturing process. The design of the screw must not only consider the fluidity of the plastic melt, but also ensure its mixing effect. We verify the effectiveness of the design through computational fluid dynamics (CFD) simulation and actual testing to ensure that the screw can provide uniform melting and mixing effects under different working conditions. Based on this data, we can further optimize the design of the screw to adapt to different types of plastic materials.

In the heat treatment and surface treatment process of the screw and barrel, we also focus on improving its thermal conductivity and surface finish. Good thermal conductivity can ensure uniform heating and cooling of the plastic melt, thereby improving production efficiency and product quality. And smooth surface treatment helps to reduce friction and accumulation of the melt during flow, further improving melting and mixing performance.