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Difference between Injection Molding and Extrusion

Injection molding and extrusion are both manufacturing processes used to create objects from thermoplastic materials. Though they share some similarities, the two processes are actually quite different. In this post, we’ll take a look at the key differences between injection molding and extrusion. By understanding the differences, you can better decide which process is best suited for your needs.

What is Injection Molding?

Injection Molding is a manufacturing process for creating parts by injecting molten material into a mold. Injection molding can be performed with a variety of materials, including metals, glasses, elastomers, confections, and most commonly thermoplastic and thermosetting polymers. Material for the part is fed into a heated barrel, mixed, and forced into a mold cavity where it cools and hardens to the configuration of the cavity. Injection molding is used to produce thin-walled plastic parts with high dimensional accuracy and excellent structural integrity.

Injection molding is the most commonly used manufacturing process for the fabrication of plastic parts. A wide variety of products are manufactured using injection molding, which varies greatly in their size, complexity, and application. Injection Molding is capable of producing very precise parts with tight tolerances. It is also well suited for high-volume production. Injection Molded parts can be complex in shape with intricate details and are ideal for applications where durability and strength are required.

What is Extrusion Molding?

Extrusion is a manufacturing process where the material is forced through a die or nozzle to create the desired shape. Extrusion can be performed with a variety of materials, including metals, plastics, and concrete. The process is often used to create long, continuous shapes such as pipes and tubes. Extrusion can also be used to create complex shapes with cavities or holes. The speed and pressure of the extrusion process can be varied to control the final shape of the product. Extrusion is a versatile manufacturing technique that can be used to create a wide range of products.

Difference between Injection Molding and Extrusion

Injection Molding is a manufacturing process for creating parts by injecting molten material into a mold. Injection molding can be performed with a variety of materials, including metals, glasses, elastomers, confections, and most commonly thermoplastic and thermosetting polymers. Material for the part is fed into a heated barrel, mixed, and forced into a mold cavity where it cools and hardens to the configuration of the cavity. Injection molding is used to produce thin-walled plastic parts with high dimensional accuracy and excellent structural integrity.

Injection molding is the most commonly used manufacturing process for the fabrication of plastic parts. A wide variety of products are manufactured using injection molding, which varies greatly in their size, complexity, and application. Injection Molding is capable of producing very precise parts with tight tolerances. It is also well suited for high-volume production. Injection Molded parts can be complex in shape with intricate details and are ideal for applications where durability and strength are required.

Conclusion

Injection molding and extrusion are two common manufacturing processes used to produce plastic parts. Both processes have their own advantages and disadvantages, which we’ve outlined in this post.

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