What pretreatment steps are required for copper nut injection nut embedded parts to improve their bonding with plastic?
Release Time : 2025-01-22
The pretreatment of copper nut injection nut embedded parts before injection molding is a crucial link, which is directly related to the quality and performance of injection molded parts. The main purpose of pretreatment is to clean the surface of copper nut, remove oil, impurities and oxide layer, so as to improve its bonding with plastic materials.
First of all, copper nut injection nut embedded parts need to be thoroughly cleaned. This step can be done using an ultrasonic cleaner or solvent cleaning method. Ultrasonic cleaners use tiny bubbles generated by high-frequency vibration to impact and peel off dirt on the surface of copper nuts, while solvent cleaning methods use specific solvents to dissolve and remove oil. Regardless of which method is used, it is necessary to ensure that the surface of copper nut is clean and oil-free so that plastic materials can be fully infiltrated and bonded.
Secondly, for copper nuts with oxide layer on the surface, deoxidation treatment is also required. The oxide layer will affect the bonding between copper nut and plastic, so it needs to be removed by pickling, sandblasting or electrochemical polishing. These treatment methods can effectively remove the oxide layer on the surface of copper nut, exposing a fresh metal surface, thereby improving bonding.
In addition, in order to improve the bonding strength between the copper nut and the plastic, it is sometimes necessary to apply a special adhesive or primer on the surface of the copper nut. These adhesives or primers can react chemically or physically adsorb with the plastic material to enhance the bonding strength. When selecting an adhesive or primer, factors such as the type of plastic material, injection molding temperature and pressure need to be considered to ensure their compatibility and effectiveness.
Finally, after the pretreatment is completed, the copper nut needs to be dried to remove residual moisture and solvent on the surface. The drying temperature and time should be determined according to the requirements of the adhesive or primer to avoid excessive drying or insufficient drying.
In summary, the pretreatment steps of copper nut injection nut embedded parts before injection molding include cleaning, deoxidation, coating of adhesive or primer, and drying. These steps can effectively improve the bonding strength between the copper nut and the plastic and ensure the quality and performance of the injection molded parts. In actual production, the appropriate pretreatment method and parameters should be selected according to the material of the copper nut, the type of plastic and the requirements of the injection molding process.
First of all, copper nut injection nut embedded parts need to be thoroughly cleaned. This step can be done using an ultrasonic cleaner or solvent cleaning method. Ultrasonic cleaners use tiny bubbles generated by high-frequency vibration to impact and peel off dirt on the surface of copper nuts, while solvent cleaning methods use specific solvents to dissolve and remove oil. Regardless of which method is used, it is necessary to ensure that the surface of copper nut is clean and oil-free so that plastic materials can be fully infiltrated and bonded.
Secondly, for copper nuts with oxide layer on the surface, deoxidation treatment is also required. The oxide layer will affect the bonding between copper nut and plastic, so it needs to be removed by pickling, sandblasting or electrochemical polishing. These treatment methods can effectively remove the oxide layer on the surface of copper nut, exposing a fresh metal surface, thereby improving bonding.
In addition, in order to improve the bonding strength between the copper nut and the plastic, it is sometimes necessary to apply a special adhesive or primer on the surface of the copper nut. These adhesives or primers can react chemically or physically adsorb with the plastic material to enhance the bonding strength. When selecting an adhesive or primer, factors such as the type of plastic material, injection molding temperature and pressure need to be considered to ensure their compatibility and effectiveness.
Finally, after the pretreatment is completed, the copper nut needs to be dried to remove residual moisture and solvent on the surface. The drying temperature and time should be determined according to the requirements of the adhesive or primer to avoid excessive drying or insufficient drying.
In summary, the pretreatment steps of copper nut injection nut embedded parts before injection molding include cleaning, deoxidation, coating of adhesive or primer, and drying. These steps can effectively improve the bonding strength between the copper nut and the plastic and ensure the quality and performance of the injection molded parts. In actual production, the appropriate pretreatment method and parameters should be selected according to the material of the copper nut, the type of plastic and the requirements of the injection molding process.