Analysis on the advantages and disadvantages of insert injection molding

Insert Molding (InsertMolding) is widely used in automotive, medical, electronics, and connector industries. The common inserts are metal. Precision is a manufacturer of precision metal and plastic parts. Through independent research and development and manufacturing of automation equipment, it has realized the automation of the feeding and assembly process, ensuring the efficiency and stability of production. In this article, the author analyzes the advantages and disadvantages of insert injection molding for you. 1. Advantages of insert injection molding 1) The combination of plasticity, elasticity and metal rigidity, strength and heat resistance can be combined to make a complex and exquisite metal-plastic integrated product; reduce product size and Weight; 2) The combination of plastic insulation and metal conductivity can meet the basic functions of electrical products; it can also meet some special requirements, such as magnetic permeability, wear resistance and tightness; 3) Adding to plastic Metal inserts can improve the strength of plastic parts; 4) Insert injection molding increases product design flexibility and provides new possibilities for the combination of plastics, metals and other parts; 5) Avoid hot melting, welding and riveting Such secondary processing can shorten the assembly time and reduce the cost; 6) Inserts are not only metal, but also include cloth, paper, wire, plastic, glass, wood, coils, electrical parts and plastic parts, etc.; 7 ) For rigid molded products and bending elastic molded products on rubber gaskets, after injection molding on the substrate to make an integrated product, the complicated operation of arranging the sealing ring can be omitted, making the automated assembly of the subsequent processes easier; 8) Because it is a combination of molten plastic and metal inserts, compared with the press-in molding method, the gap of the metal inserts can be designed to be narrower, and the product reliability is higher; it is easier to pass vibration and other tests; 9) select the appropriate Plastics and molding conditions, that is, for products that are easily deformed and damaged (such as glass, coils, electrical components, etc.), they can also be sealed and fixed by plastic; 10) Choose an appropriate mold structure, and the insert products can also be completely enclosed in plastic . 11) The combination of a vertical injection molding machine, a manipulator, an insert product line-up device, etc., most of the insert molding project can realize automated production. 2. Disadvantages of insert injection molding 1) The placement of inserts usually complicates the mold structure, prolongs the injection molding cycle, increases manufacturing costs, and increases the difficulty of automated production; 2) The thermal expansion coefficient of the insert and the plastic is inconsistent, which is easy to make the product Internal stress is generated, causing the product to break; 3) Or the product is deformed due to the inconsistency of the thermal expansion coefficient of the insert and the plastic; 4) The insert often needs to be preheated or dried to reduce the internal stress; 5) The insert It must be firmly fixed in the mold, otherwise it is easy to shift or deform under the impact of the molten material; 6) Once the insert injection molding produces defective products, such as poor injection molding, missing inserts, poor positions, etc., it will cause the entire product Scrap, the cost is huge; 7) Insert injection molding is not conducive to product recycling and scrapping. [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