12 things you need to know about automatic insert injection molding

Metal insert injection molding is a process that combines metal parts and plastics, and is widely used in various fields. The placement of inserts in the mold during insert injection molding can be divided into two types: manual placement and automated placement. Automation is a better choice for mass production. In this article, the author introduces the 12 points you need to know about automatic insert injection molding: 1. Metal insert injection molding is prone to uneven molding shrinkage. Limit tests on the shape and dimensional accuracy of important parts should be done in advance. 2. The metal insert is easy to deform and shift during the injection process, so full consideration should be given to the mold composition and the design of the mold shape that is easy to maintain the metal insert. For products whose insert shape cannot be changed, pre-testing is indispensable. 3. When the arrangement of the metal inserts is separated and the conveyor is used, the contact between the metal inserts and the inserts and the vibrating ball will cause slight damage to the surface of the inserts, which will affect the product quality. The tolerance limits of its quality should be confirmed in advance. 4. The zigzag, warpage, material thickness difference, diameter difference, and thickness difference caused by gold-plating processing of metal inserts should be measured in advance. On this basis, the matching selection design of the automation device and the design of the mold structure are carried out. 5. Predictable issues that restrict the mold structure, such as the location of the mold gate, the molding cycle, etc., should be resolved in advance or corresponding countermeasures. 6. It should be confirmed whether the metal inserts need to be preheated or dried. The purpose is to ensure product quality and stability of molding. 7. The various detection devices installed in the mold are used to ensure the stability of the molding action when the mold is affected by environmental conditions such as heat, force, and vibration. It should be confirmed whether it is used. 8. In order to avoid the accumulation of small pieces of metal inserts and molded products in the mold cavity, an air blowing device can be assembled. 9. Due to the high investment price of system equipment, it is necessary to fully consider whether it can ensure the production volume after equipment operation before adopting it. When using a dedicated machine, it is necessary to ensure that the product can be continuously produced without a formal update for several years. 10. When a general-purpose machine is used, it is necessary to confirm how many types of inserts are produced in various combinations and in small batches. If mass production cannot be guaranteed as a whole, it is difficult to recover the fixed assets of each product. In this case, it is necessary to replace a part of the device to adapt to the variety update requirements within a certain range. 11. The precision of the metal insert product, the shape of the insert, whether the mold is beneficial to the insert molding and the shape of the molded product, etc., determine the molding rate, productivity, and molding cost of the insert. 12. The effective combination of injection machines, molds, and automation devices and how to function in a short time are the keys to determining the automatic insert molding system. It is recommended to consult with manufacturers with considerable performance and experience. Guangdong Precision Technology Co., Ltd. is a manufacturer of precision metal stamping and metal insert injection molding. Our core technical team has focused on precision metal stamping and metal insert injection molding for more than 30 years. It has an automation team and independent research and development of assembly automation equipment. [Related recommendation] Learn more: 精の corporate culture Learn more: Continuous improvement and innovation are the key factors for the survival of stamping companies Learn more: Why most stamping factories are unwilling to quote foreign trade companies