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Injection Molding

Plastic Injection Molding Service
At BEST PARTS we specialize in producing high-quality plastic injection molded parts and mold tools. We offer machining and finishing services to make tools from a variety of materials, and can produce 50 to 100,000+ finished parts in a wide variety of plastics.

With advanced material verification and quality processes we can ensure your tools and parts exceed your expectations. If you’re ready to start your next project, upload your product design information for a competitive injection molding quote today.
How Plastic Injection Molding Works

Plastic injection molding is by far the most common way to produce large volumes of finished plastic parts for every kind of commercial and industrial use. Molten resin is injected under high pressure into the cavity of a metal die and then rapidly cooled, forming a solid shape. A single cycle to make a finished part may take anywhere from a few seconds to minutes depending on part complexity and size.

Once your plastic injection mold tools are ready, the molding process consists of the following basic steps:

Color selection and reprocessing services

Samples of parts supplied by the customer as well as custom colors.

The mold texture follows industry standards and you can completely hand over the product to our processing.

Laser engraving is applied to the mold or directly to the final part to obtain information such as the part number.

The basic components include fastening the fastening molded parts we manufacture together.

The Plastic Injection Molding Process

Step 1. The plastic resin comes in raw pellets. These are dried to the right moisture content, and then if necessary they can be blended with pigments or master batch colorants.

Step 2. The dried pellets are poured into the hopper of the molding machine. A reciprocating screw inside the barrel of the machine will transport these pellets towards the mold.

Step 3. Within the barrel, the pellets are mixed and heated until fully molten, forming the liquid resin.
Step 4. The heated mold closes automatically and resin, under great pressure, is injected through a gate and into the mold cavity.
Step 5. The mold is cooled to solidify the part inside.

Step 6. The mold opens and the part is ejected to begin a new cycle.

Why use injection molding
The main advantage of injection molding is the ability to produce on a large scale. After paying for the mold and designing the original, the price per unit during the injection molding process is very low. Other advantages of injection molding are:
1.Compared with the traditional CNC manufacturing process, the injection molding produces a low scrap rate, and the CNC machining is costly in the manufacturing process.

2.3D printing is also comparable to injection molding. 3D printing is an additive manufacturing process with lower scrap rates, but 3D printing requires higher technology.

If you want to start a business with injection molding, you may need to know some basic information:

Initial cost

Preparing a product for injection molding requires a certain amount of cost.
Production quantity

BESPARTS can produce small and large quantities of parts, and it is necessary to determine injection molding as the most cost-effective manufacturing method.
Delivery time

Mold design takes time and is just one step in injection molding. Before the production of injection molded parts, the parts must be designed for prototyping (possibly by CNC or 3D printing) before the parts can be mass produced. Finally, you usually get injection molded parts after extensive testing in both stages.

For more information on the materials used in injection molding products !

If you would like more information, please pay attention to our other injection molding process. If you are looking for injection molding service, please send us your request.

BEST PARTS Injection Molding Shop:


EDM Work Shop and CNC Machining Work Shop:



CNC Machining Work Shop: