Plastic Injection Molding Machine Vs Extruder: Which Reigns Supreme?

Plastic Injection Molding Machine Vs Extruder Which Reigns Supreme

A plastic injection molding machine is used to produce plastic parts by injecting molten plastic into a mold, while an extruder is used to create plastic products by pushing melted plastic through a die. Both machines serve different purposes in the plastic manufacturing process.

What is an Injection Molding Machine

Plastic injection molding machines are widely used in the manufacturing industry to produce complex and precise plastic parts in high volumes. They offer high production efficiency and enable the production of intricate designs with tight tolerances.

What is Extruder

Extruders are commonly used to manufacture plastic products with continuous shapes such as pipes, tubing, and profiles. They are ideal for producing plastic products with uniform cross-sections and long lengths.


Plastic Injection Moulding Machine

A Plastic Injection Moulding Machine is a versatile and precise tool used in the manufacturing industry for producing a wide range of plastic products. This machine uses the process of injecting molten plastic into a mold to shape the desired product.

  • Precise control: The Plastic Injection Moulding Machine offers precise control over the injection speed, pressure, and temperature, making it suitable for producing intricate and complex plastic parts.
  • Wide range of materials: This machine can work with a wide range of materials, including thermoplastics, elastomers, and thermosetting polymers.
  • High production capacity: With its ability to open and close molds quickly, the Plastic Injection Molding Machine enables high-volume production.
  • Minimal material wastage: The precise control of the injection process reduces material wastage, resulting in cost savings.


An extruder is another commonly used machine in plastic manufacturing. It is primarily used for producing continuous profiles, such as pipes, tubing, and sheets. Unlike the injection molding machine, the extruder operates by squeezing plastic materials through a die to shape them.

  • Continuous production: The extruder allows for continuous production, making it suitable for producing long plastic profiles.
  • Uniformity: The extrusion process ensures uniformity in the final product, which is important for products like pipes or tubes.
  • Material versatility: It can work with various materials, including thermoplastics, rubber, and even food products.
  • Cost-effective: Due to its continuous production capability, the extruder offers cost advantages for high-volume production.

In conclusion, both the Plastic Injection Molding Machine and the Extruder have their unique functionalities and benefits. The choice between the two depends on the specific needs of a manufacturer, such as the type of plastic product, production volume, and desired level of precision. Understanding the functionality of these machines allows manufacturers to make an informed decision and optimize their plastic manufacturing processes.

Plastic Injection Molding Machine Vs Extruder: Which Reigns Supreme?

Key Differences

Understanding the key differences between a plastic injection molding machine and an extruder is crucial for manufacturers in the plastic industry. Each machine has a distinct role in the manufacturing process, leading to differences in the process itself and the variability of the final product.


The process of a plastic injection moulding machine involves melting plastic granules and injecting the molten material into a mold cavity. This process is ideal for producing high-volume and complex plastic parts.

In contrast, an extruder works by pushing heated plastic material through a cylindrical screw, which melts and softens the plastic.

Product Variability

The product variability of a plastic injection molding machine is relatively low. This is because the machine ensures consistent and precise control over key parameters such as temperature, pressure, and cooling time. As a result, manufacturers can achieve high dimensional accuracy and tight tolerances, making it suitable for applications that require intricate details and complex geometries.

On the other hand, an extruder offers greater product variability due to the flexibility in adjusting key parameters. Manufacturers can control variables such as screw speed, temperature, and die design to achieve different product characteristics. 

In summary, the key differences between a plastic injection molding machine and an extruder lie in the process and product variability. The injection molding machine excels in producing high-volume and complex parts with precision, while the extruder offers greater customization options and flexibility in product characteristics.


Plastic injection molding machines offer a range of advantages that make them a popular choice in the manufacturing industry. These machines use a high-pressure injection method to produce large volumes of identical plastic parts, making them highly efficient for mass production.

Extruders are a versatile tool used in various industries for shaping and forming materials. They offer several advantages such as continuous production, precise control over the shape and size of the output, and the ability to process a wide range of materials.

Plastic Injection Molding Machine Vs Extruder: Which Reigns Supreme?


Plastic injection moulding machines and extruders serve different purposes in applications. While injection molding machines provide high precision and complex part production, extruders are ideal for continuous production and creating uniform profiles. These machines offer distinct advantages based on specific manufacturing needs.

Plastic Injection Molding Machine

Plastic injection molding machines are versatile and widely used in various industries for molding plastic products. Their applications range from manufacturing small components to producing large-scale plastic products. Let’s explore the different applications of plastic injection molding machines:

  1. Automotive Industry: Plastic injection molding machines play a crucial role in the automotive industry by producing various components like bumpers, dashboards, and interior trim parts.
  2. Medical Industry: In the medical field, these machines are used to manufacture precision components such as syringes, medical devices, and implantable medical products.
  3. Electronics Industry: Plastic injection molding machines are heavily utilized in the electronics industry. To produce components like switches, connectors, and housings for electronic devices.
  4. Consumer Goods: From household items like kitchenware and toys to consumer electronics like mobile phone cases. Plastic injection molding machines are employed extensively for manufacturing a wide array of consumer goods.
  5. Packaging Industry: These machines play a significant role in the packaging industry. Where they are used to produce various types of containers, lids, and other packaging components.


An extruder is another essential machine used in the plastic manufacturing process. It is primarily designed to melt, mix, and shape raw plastic materials before forming the final products. Let’s take a look at some of the key applications of extruders:

  1. Plastic Film Production: Extruders are widely used to manufacture plastic films used in packaging materials. Such as polyethylene films for food packaging and stretch films for pallet wrapping.
  2. Pipe and Profile Extrusion: Extruders are crucial for the production of plastic pipes, tubes, and profiles. Used in various industries, including construction, agriculture, and automotive.
  3. Sheet Extrusion: Extruders are used to produce plastic sheets used for various purposes like signage, automotive parts, and construction materials.
  4. Wire and Cable Coating: The extrusion process is employed in the production of plastic coatings for wires and cables, providing insulation and protection.
  5. Plastic Recycling: Extruders play an important role in plastic recycling by melting. And extruding recycled plastic materials into usable forms for manufacturing new products.

In summary, plastic injection molding machines and extruders have diverse applications in different industries. While plastic injection molding machines are suitable for producing complex-shaped products, extruders excel in continuous processes like film production and pipe extrusion. Understanding their respective applications allows manufacturers to choose the most appropriate machine for their specific product requirements.

Plastic Injection Molding Machine Vs Extruder: Which Reigns Supreme?

Frequently Asked Questions On Plastic Injection Molding Machine Vs Extruder

What Is A Plastic Injection Moulding Machine?

A plastic injection moulding machine is a device used to produce plastic products by injecting molten plastic into a mold. It consists of a feeding system, heating and cooling system, and an injection unit, allowing for precise and repeatable production of plastic parts.


How Does A Plastic Extruder Work?

A plastic extruder is a machine that melts plastic resin and forces it through a die to create a continuous profile. The process involves feeding plastic pellets into a heated barrel, where they melt and are pushed through a screw. That compresses and forces the molten plastic through a die to create the desired shape.

What Are The Advantages Of Plastic Injection Molding Machines?

Plastic injection moulding machines offer several advantages, including high production efficiency, precise and complex part production. Ability to use a wide range of materials, low labor costs, minimal scrap waste, and consistent part quality. They also enable design flexibility and can produce parts with intricate details.


What Are The Benefits Of Using Plastic Extruders?

Plastic extruders have advantages such as high production speed. Continuous production, versatility in shape and size, ability to process various types of plastics, low scrap waste, and cost-effective production. They are ideal for creating profiles, tubes, sheets, and other continuous plastic products.


Final Thought

Both plastic injection moulding machines and extruders offer unique advantages and are essential in the manufacturing industry. Understanding the differences and applications of these machines is crucial for businesses to make informed decisions. Whether it’s precision molding or continuous production, choosing the right equipment can significantly impact product quality and overall efficiency.

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Frequently Asked Questions

Daoben has the SOP (Standard Operation Procedure) and all the production steps must follow up this SOP. Every machine needs at least automatic running over 72 hours and must be inspected carefully before shipment.

Actually, the delivery time of the machines is depended on the machine options. Normally, the delivery time of a standard machine could be within 1-2 months.

12 months warranty after shipment for mechanical parts, hydraulic parts, and electric components excluding the screw and barrel 6 months (not including use for recycled material or reclaimed material).

Yes, Daoben will provide one set of standard spare parts to the customer including a heater, filter, screw head, screw washer, checking ring, sealings, etc.

Surely, we have experienced technical engineers for oversea service, they would help you install machines and support training to workers also. Currently, we provide visits online by video call for COVID-19.

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