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Custom Injection Molding: What You Need to Know


If you are new to the term custom injection molding, we will first explain the definition. Basically, this process is used to create plastic parts to meet the requirements of a specific application. In other words, this process allows us to customize components based on customer-supplied requirements. Let’s find out more.

custom plastic parts

The injection molding process uses plastic pellets. It is melted at high temperatures and pushed into a special mold cavity. In the next step, the part is removed from the mold and set aside. This is how the process repeats over and over again.

The forming device has a clamping part that opens or closes the cavity of the mold. There are also injection units that use heat to melt the material and force it into a mold. Typically, hydraulic machines are used to generate high pressure for injection molding.

Tooling must be strong enough to withstand high pressure. Therefore, they are made of high-strength metals such as aluminum or steel. Tooling costs are often quite high, but the overall cost of plastic injection mould suppliers is quite reasonable.

mechanical parts

Basically, this process has three main components. The first component is called the injection unit. This uses heat to liquefy the plastic pellets and force them into a mold. The mold is custom designed according to the product made. The third component is a clamping device that provides controlled pressure.

The mold has a base and several holes to hold the resin in place during processing. The injection part is responsible for liquefying the plastic pellets and injecting them into the cavity inside the mold.

Once the required amount of resin has been injected into the mold, it is usually cooled using water. This step completes the process and the required part comes out of the mold as a solid object.

possible complications

First of all, if the mold is designed carefully, it will not cause any complications in the molding process. Parts may burn or scorch if the temperature exceeds the maximum limit.

Warpage can occur due to changes in the surface temperature of the mold. When this happens, the liquid plastic breaks down and releases hot gases. Besides temperature changes, it can also be caused by moisture particles in the liquid plastic. The same problem can also occur if the cavity is not properly filled.

Started injection molding business

Keep in mind that to start a custom molding startup, you must first choose a niche. Most molders today have their own niche. Experience allows you to do much better at what you do. Once you’ve acquired your expertise, you need to keep it. This will help you make tons of money along the way.

This was an introduction to custom injection molding. We hope this article will help you understand the process more deeply.

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