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Twin Screw Extruder, Superior Option For Technological Know-how Plastic Type Industry

Technology is at its peak these days. You can come across a technological solution to problems in all fields and industries. The plastic type industry is one such sector that provides a wide range of valuable resources and products to sustain life. 

Hence, to ace, the plastic industry’s functioning, numerous machines and devices are coming into play. These are primarily meant to transform plastic into desirable and attractive shapes and models to be used in daily life.

Twin-screw extruder is one such classic machine ruling the globe. It is a superior option for technological know-how in the plastic-type industry. Now you might have a lot of questions in mind regarding this bizarre machine. Well, let us clear them to you with a detailed discussion on the twin-screw extruder.

How does a twin-screw extruder work?

A twin-screw extruder is mainly used for mixing or compounding two or more substances. In the plastic industry, it forms a compound of different polymer formulations and turns viscous substances, such as plastic, into uniform melts. 

The process is carried out by its two-intermeshing, and co-rotating screws enclosed in a barrel and mounted on splined shafts. The two rotating screws press the solid material, generating a sheering force and heat. These aspects melt the plastic and extrude the desired product with various dimensions.

What are the advantages of a twin-screw extruder?

A twin-screw extruder has many advantages that make it highly applicable in the plastic extrusion process.

  • Top-class mixing: a twin-screw extruder has a great compounding ability. It mixes and shears the raw materials fed precisely and accurately. It is mainly due to the rotating mechanism of its screws that come in various designs. Hence, you get a master batch by efficiently agglomerating the plastic materials with fillers, pigments, or functional additives.
  • Flexible: twin-screw extruder handles the extrusion process with utmost flexibility. It performs a series of processes with consistency and efficiency throughout. You can use a twin-screw extruder to melt, mix, cook, cool, and vent various raw materials and get the desired output. 
  • High scope: A twin-screw extruder can also compound a wide range of raw materials, which makes it highly demanded in the plastic-type industry. You can try different polymers’ formulations and additives, such as fillers, light stabilizers, pigments, and antioxidants. It leverages a constant pump machine that sets the most appropriate dimensions of the products.
  • Energy-efficient: twin-screw extruder is highly energy-efficient. It utilizes low power and has a high production capacity per hour. 

What are the applications of a twin-screw extruder?

Twin-screw extruders are mainly applicable in the plastic industry. Besides ruling the polymer industry, they also find use in the food and chemical industry. Most industries use it to produce rigid PVC and wood fiber blends. You can come across RPVC dual conduit pipes, PVC profiles, RPVC pipes, and PVC compounding manufactured by a twin-screw extruder with appropriate dimensions and high quality.

Other industries leverage a twin-screw extruder to manufacture daily-use products, such as soaps, detergents, adhesives, cellulose pulps, toners, putties, sealants, etc. The applications of a twin-screw extruder also differ with the type and shape of the screw it uses.

While a parallel twin-screw extruder processes polymers, such as nylon, polyesters, and polyolefins, a conical twin-screw extruder mainly deals with PVC. 

How is a twin-screw extruder better than a single-screw extruder?

A twin-screw extruder has numerous advantages over a single-screw extruder. It exceeds a single screw extruder in more ways than just the number of screws. A twin-screw extruder has a shorter residence time of the feed compared to a single-screw extruder. It also has a lower dispersion of shear rates and strain than the latter. 

Moreover, the twin-screw extruder has a higher connective heat transfer, greater control over temperature profile, lower energy consumption, higher mixing and exhaust ability, and more convenient material feeding than a single-screw extruder.

Conclusion

The plastic industry has a huge scope for growth. All it needs is to control the process parameters and manufacture products with the desired dimensions for daily use. A twin-screw extruder supports the plastic industry in its triumph. It provides a versatile machine to carry out a series of operations and efficiently produce highly-demanded plastic extruded products.