What Is Plastic Injection Molding Process? | MULAN

April 04, 2023

Plastic injection molding is a manufacturing process used to produce a wide range of plastic parts and products with high accuracy, consistency, and repeatability. This process involves melting plastic pellets or granules and injecting them into a mold cavity under high pressure. Once the plastic material cools and solidifies inside the mold, the finished product is ejected.

The product is widely praised for its various special applications.

Here are the basic steps involved in the plastic injection molding process:

1. Designing the mold: The first step in the process is to design a mold that will be used to create the desired shape of the plastic product.

2. Preparing the material: The plastic pellets or granules are fed into a hopper and melted using a heating element. Once the plastic material reaches the right temperature, it is injected into the mold cavity.

3. Injecting the material: The melted plastic material is injected into the mold cavity under high pressure, which helps to fill the mold and ensure that the finished product has a consistent shape and size.

4. Cooling and solidifying: Once the plastic material has been injected into the mold cavity, it is allowed to cool and solidify. This can take anywhere from a few seconds to a few minutes, depending on the thickness and complexity of the part.

5. Ejecting the finished product: Once the plastic material has solidified, the mold is opened, and the finished product is ejected. The process then repeats for the next part.

Plastic injection molding is a versatile and efficient manufacturing process that can be used to create a wide range of plastic products, from small parts to large, complex assemblies. It is commonly used in the automotive, medical, consumer goods, and electronics industries, among others.

Plastic Injection Molding Process


Mulan Group specializes in the manufacture of customized parts. It has been engaged in the customized production of plastic and metal parts for more than 18 years. 

Mulan Group uses advanced processing equipment and scientific quality management system to provide global suppliers with one-stop customized plastic and metal custom parts production solutions. 

Mulan Group provides a cost-effective one-stop supply service with an efficient sales team, reasonable low-cost quotation and strong manufacturing resources. Rich production experience allows Mulan Group’s services to meet the products of various industries. 

Mulan Group has participated in many important product development and manufacturing to understand the use characteristics and requirements of different products. In other words, only a brief description of the customer, the production plan and the actual cost of the product can form a formal report. 

Mulan Group currently owns 2 manufacturing companies and holds 3 processing plants. Its business scope includes: CNC Machining Service, sheet metal Fabrication, Rapid Prototyping, Plastic injection molding service, mould tools, etc. An experienced team of engineers and an efficient sales team provide quick feedback to all production project queries for global buyers.

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