Everything you need to know about injection molding

We use a variety of plastic things on any given day. But have you ever wondered how all those plastic things are made? Most of the plastic parts we use in our daily lives are injection molded.

Injection molding is a widely accepted manufacturing method that involves pouring molten materials into a mold. Manufacturers who need mass production use injection molding pressing services as they help produce the same items in large quantities. Industries such as medicine, automation, and aerospace use this manufacturing method to produce complex parts.

Injection molding is a fast, reliable and efficient method of production. To know more about it, you should read the guide below.

What is injection molding?

In injection molding, the molten material is poured into a mold that gives shape to the manufactured object. Manufacturers use thousands of these molds to mass produce items. Using Injection servicesyou can produce both simple and complex parts in less time.

Like other manufacturing methods, injection molding works with a variety of materials such as elastomers, glass, metals, candy, etc. It is mostly used with thermosets and thermoplastic polymers.

In this production method, machines are rated and categorized based on their tonnage or clamping pressure. This means that you will need a large machine for higher clamping pressure and vice versa. For your information, clamping pressures generally range between 5 tons to 6000 tons.

The necessary raw materials are selected based on the specifications and function of the manufactured product. Each material has unique properties that are also taken into account in the process. Polymers used in the process include nylon, polyethylene, polystyrene, phenol and epoxy. While injection molding services are primarily used for the production of plastic parts, they can be used for other materials as well.

Injection process

When it comes to mass production of identical items, injection molding is the best option. But if you want high precision parts with tight tolerances, then precision manufacturing is a better choice. Although these production methods are completely different from each other, they are essential for manufacturers. This is because they are used for different applications. Let’s now look at the steps involved in injection.

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A mold is created in the shape of a product part designed using software called CAD.


The created form is divided into two halves. The two halves are then held together by a clamping unit.


The raw materials are melted and poured into the mold, filling the entire space. For convenience, the materials are available in pellet form.


After pouring the molten material, it is allowed to cool. Once it hardens, it will take the shape of the mold.

Throwing out

The two halves held by the clamping machine separate after cooling. The finished product is removed from the mold using an ejection unit.

Compared with precision manufacturing, the production time required for injection molding is shorter. This allows manufacturers to produce more products in a short amount of time, saving time and money.

Injection considerations

An Injection service it has certain considerations that cannot be ignored. These factors must be considered before starting the process. We have explained the factors in the indicators below.


The initial cost of injection molding is generally high because it involves machines and molds. However, in the long run, it can be more cost-effective than other production methods.

Manufacturing Considerations

Minimizing the cycle can be beneficial for many reasons. Not only does it help with production, but it also allows you to use machines with better tooling and molds with hot runners.

Design factors

Simplifying the geometry of your products and reducing the number of parts helps simplify injection molding. In addition, mold design is essential to avoid defects during the production phase.

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Production quantity

When choosing injection molding, determining the number of parts you want to produce is critical. This will help you understand the costs involved and manage your finances accordingly.

Injection services are great for custom production. The molds can be designed as per the requirements and this helps to create the final product.

Types of Injection

Injection can be of different types. Before you get started, you need to learn about the types. Here is the list:

  • Die casting
  • Gas assisted injection
  • Thin-wall injection molding
  • Micro injection
  • Injection of liquid silicone
  • Cube shaping
  • Metal injection
  • Reaction injection

You can choose Injection service based on your requirements or the product you want to make.

Application Injection

As already mentioned, the injection method is used for various applications. Many industries use this method of production because of the advantages associated with it.

Injection molding is mainly used for the mass production of plastic items for its consistent quality and high performance. Now let’s look at the things that are made by this method.

  • In the automotive industry, injection molding is used to produce grilles, dashboards and bumpers.
  • In the consumer goods sector, it is used to make bottle caps, mobile phone cases, toys, etc.
  • It is also used to make various electronic components such as covers, electrical connectors, protective cases, etc.
  • The furniture industry uses it to make covers for seats, cushions and chairs.

All of these items are made using injection molding as it helps to mass produce identical items. In this way, manufacturers can also reduce production costs.

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Advantages of injection molding

Injection molding offers many advantages, making it a superior manufacturing method for industries. Some even say it’s better than precision manufacturingespecially when it comes to mass production. That being said, we will now walk you through the benefits of injection.

High production rate

Injection molding is the best manufacturing technique for mass production. All manufacturers do is pour raw materials into molds and create as many products as they want. It supports fast production, saves time and money.

Low labor costs

Thanks to injection molding, manufacturers can also save significantly on labor costs. Companies produce mass goods at low prices because they do not need a large labor force to do so. This allows them to save more money and use it for other things.

Environmentally friendly

Compared to other production methods, injection molding is much more environmentally friendly. This is because it leads to less waste, which is common with CNC machining.

High resistance

Injection molded products are strong and durable. These products do not break or scratch easily. In addition, you can use different materials to increase the durability of the products.

Variety of materials

Injection molding uses different types of plastics to produce products. It allows manufacturers to choose the type of plastic they want for their products.

High precision accuracy

Using injection molding, it is possible to produce precise parts with high tolerances. Molds are structurally held within tight tolerances.

Injection molding is the preferred choice when it comes to mass production. This process is not only fast but also produces consistent results. In addition, it helps manufacturers save money, time and effort. For these reasons, injection molding is accepted in many industries.

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