What is the Working Principle and Structure of Injection Molds?Injection molds are an important part of the injection molding process. Their function is to inject molten plastic materials into the mold to form the required molded parts.

 

What is the working principle and structure of injection molds?

Injection molds are an important part of the injection molding process. Their function is to inject molten plastic materials into the mold to form the required molded parts.

Injection molds have complex structures and highly precise process requirements, so it is very important to understand their working principles and structures. Let's take a closer look.

1. What does the working principle of injection molds mean?

Injection molds are mainly divided into two steps during the working process: filling and curing. In the filling stage, the injection molding system of the mold injects the molten plastic material from the injection molding machine into the mold through the preset pressure and flow rate to achieve the purpose of filling the mold cavity. In the curing stage, the plastic material to be injected cools rapidly inside the mold and hardens into a molded part. At this time, the mold opens and pushes the molded part out of the mold to complete the entire injection molding process.

 

 

2. What does the structure of the injection mold mean?

The structure of the injection mold includes several parts such as the injection molding system, mold structure, cooling system and exhaust system, each of which has an important impact on the effect and quality of injection molding.

(1) Injection molding system:

It refers to the connection between the mold and the injection molding machine. Through this system, the molten plastic material in the injection molding machine is transported to the mold to realize the molding of the part. The system includes components such as nozzles, melt hoppers and storage hoppers.

(2) Mold structure:

It refers to the internal shape and structure of the mold, including parts such as the mold cavity, template, steel billet and guide pillars. The design and manufacture of injection molds depend on the requirements of the molded product and the shape and size of the parts. Therefore, many aspects need to be considered during the design process.

(3) Cooling system:

It refers to the cooling channel of the mold, which is used to quickly cool down the mold after filling and harden the solidified plastic material. The cooling system includes cooling water pipes, cooling holes, cooling water tanks and other components. Its design and layout depend on the size and shape of the molded parts and the requirements of production efficiency.

(4) Exhaust system:

It refers to the system used to remove harmful gases such as air and water vapor. It is very important in the injection molding process. If these gases are not removed in time, they will have a negative impact on the injection molding material, such as causing bubbles and shrinkage holes.

In summary, understanding the working principle and structure of injection molds is crucial to optimizing the injection molding process and improving the quality of finished products. Only by mastering these basic concepts and process routes can we better achieve standardized and efficient production of molded products.