Insert molding refers to a molding method in which a pre-prepared insert of dissimilar materials is put into a mold and then resin is injected, molten material is joined and solidified with insert to make an integrated product.
Out-sert molding (out-sert molding) refers to a method of embedding injection molded parts on a part of a metal plate surface.

 

1. Combination of easy formability and flexibility of resin and rigidity, strength and heat resistance of metal complement each other to make complex and exquisite metal-plastic integrated products.

2. In particular, using combination of insulation of resin and conductivity of metal, molded product can meet basic functions of electrical products.
3. Pre-molding combination of multiple inserts makes post-engineering of product unit combination more rational.
4. Insert products are not limited to metals, but also cloth, paper, wires, plastics, glass, wood, coils, electrical parts, etc.
5. For rigid molded products and bending elastic molded products on rubber gaskets, after injection molding on substrate to make an integrated product, complicated operation of arranging sealing ring can be omitted, making automatic combination of subsequent processes easier.
6. Because it is joining of molten material and metal insert, compared with press-in molding method, gap of metal insert can be designed to be narrower, and molding reliability of composite product is higher. .
7. Choose appropriate resin and molding conditions, that is, for products that are easily deformed and damaged (such as glass, coils, electrical parts, etc.), resin can also be sealed and fixed.
8. Choosing an appropriate mold structure, insert product can also be completely enclosed in resin.
9. After insert is formed, it can also be made into products with hollow grooves after core hole processing.
10. With combination of a vertical injection molding machine, a manipulator, and an insert product aligning device, most of insert molding process can be automated.

1. Metal insert molding is prone to uneven molding shrinkage, so limit tests on shape and dimensional accuracy of important parts should be done in advance.
2. Metal insert is easy to deform and shift during injection process, so full consideration should be given to mold composition and design of mold shape that is easy to maintain metal insert. For products whose insert shape cannot be changed, prior testing is indispensable.
3. When arrangement of metal inserts is separated and conveyor is used, contact between metal inserts and inserts and vibrating ball will cause slight damage to surface of inserts, which will affect quality of product. Allowable limit range of its quality should be confirmed in advance.
4. Jaggedness, 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, matching selection design of automation device and design of mold structure are carried out.
5. Predictable items that restrict mold structure such as mold gate position and molding cycle should be resolved in advance or corresponding improvement measures.
6. It should be confirmed whether metal insert needs to be preheated or dried. Purpose is to ensure product quality and stability of molding.
7. Various detection devices installed in mold are used to ensure stability of molding action under influence of environmental conditions such as heat, force, and vibration of mold. It should be confirmed whether they are used.
8. In order to avoid accumulation of small pieces of metal inserts and molded products in cavity, an air blowing device can be assembled if necessary.
9. Due to high investment price of system equipment, it is necessary to fully consider whether it can ensure production volume after equipment operation before adopting it. When using a dedicated machine, it is necessary to ensure that 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 a combination of multiple varieties and small batches. If mass production cannot be guaranteed as a whole, it is difficult to recover fixed assets of each product. In this case, it is necessary to replace a part of device to adapt to variety update requirements within a certain range.
11. Precision of metal insert, shape of insert, whether mold is beneficial to insert molding and shape of molded product, other factors and technologies that determine molding rate, productivity, and molding cost of insert.
12. Effective combination of injection machines, molds, automation devices and how to function in a short time are keys to determining automatic insert molding system.