Injection molding is a common plastic processing technology, and connectors, as an important component in electronic devices, are also widely used in the manufacturing process. This article will introduce the principle and process of the connector injection molding process in detail.
1. Injection molding principle.
Injection molding is a thermoplastic molding method, the basic principle of which is to melt the thermoplastic into a flowing liquid at a high temperature, and then inject it into a cooled cavity through a mold under pressure, and after cooling and solidification, the desired shape and size of the plastic product is obtained. In connector injection molding, commonly used thermoplastics include PVC, PC, PA, etc.
2. Injection molding process.
1.Preparation of raw materials.
The raw materials for connector injection molding are generally granular thermoplastics, which need to be dried to remove moisture and volatiles to ensure the quality and stability of molding.
2.Mold design and manufacturing.
Mold is the key equipment of injection molding, and its design and manufacturing accuracy directly affects the quality and size of the product. In connector injection molding, the mold is generally made of hard materials such as steel, and the structure, size, demoulding slope and other factors of the product should be fully considered when designing to ensure the smooth demoulding of the product.
3.Injection machine selection.
The injection machine is the main equipment for injection molding, and its selection should be determined according to the size, weight, fluidity of the plastic and other factors. In connector injection molding, small and medium-sized injection machines are generally selected to ensure molding efficiency and reduce costs.
4.Molding process parameters are determined.
Molding process parameters are important factors affecting the quality of products, including injection temperature, injection pressure, mold temperature, cooling time, etc. In connector injection molding, reasonable process parameters should be determined according to the characteristics of the plastic and the structure of the product to ensure the dimensional accuracy and appearance quality of the product.
5.Molding operations.
The molding operation is to inject the molten plastic into the mold cavity according to the determined process parameters, and then cool and solidify. In connector injection molding, special attention should be paid to controlling the injection speed and injection volume to ensure the uniformity of the product and reduce the internal stress. At the same time, the cooling time is also an important factor affecting the performance of the product, and a reasonable cooling time should be determined according to the size and complexity of the product.
6.Product demoulding and post-processing.
Product demoulding is to remove the cooled and cured product from the mold. In connector injection molding, it is necessary to ensure that the demoulding angle between the product and the mold is reasonable, so as to facilitate demoulding. The post-treatment of the product includes the removal of flash, machining, surface treatment, etc., to ensure that the quality and performance of the product meet the requirements.
3. Characteristics of connector injection molding process.
1.High efficiency: Injection molding has high production efficiency, which can greatly shorten the production cycle and reduce production costs.
2.High precision: The temperature and pressure of the plastic melt can be accurately controlled during the injection molding process, and the dimensional accuracy of the product is high.
3.Complex structures can be processed: Injection molded molds are designed and manufactured flexibly, and connectors with complex structures can be processed.
4.High requirements for raw materials: Because the fluidity, thermal stability and other factors of the plastic melt in the injection molding process have a great impact on the quality of the product, the quality requirements for raw materials are high.
5.Strict control of process parameters: In the process of injection molding, process parameters need to be strictly controlled to ensure product quality and stability.
IV. Conclusions. As a common plastic processing technology, connector injection molding process has the advantages of high efficiency, high precision, and complex structure, and is widely used in the field of electronic equipment manufacturing. Understanding and mastering the principles and processes of connector injection molding process is of great significance for improving product quality and production efficiency. In the future, with the continuous development of science and technology, the connector injection molding process will continue to be optimized and innovated to provide strong support for the development of electronic equipment manufacturing.