Insert molding refers to a molding method in which a resin is injected into a mold and a resin is injected into a mold, and the molten material is bonded to the insert to form an integrated product. Out-sert molding refers to a method of inserting an injection molded part on a part of a metal plate surface.
The above two molding methods are essentially the same.
Its characteristics are as follows:
1. The combination of the moldability and flexibility of the resin and the rigidity, strength and heat resistance of the metal complements the complex and intensive metal-plastic integrated product.
2. In particular, the combination of the insulating properties of the resin and the electrical conductivity of the metal can be used to satisfy the basic functions of the electrical product.
3. The pre-formed combination of multiple inserts makes the post-engineering of the product unit combination more rational.
4. Inserts are not limited to metal, but also cloth, paper, wire, plastic, glass, wood, wire, electrical parts and so on.
5. For the rigid molded product and the curved elastic molded product on the rubber gasket plate, after the integrated product is formed by injection molding on the substrate, the complicated operation of arranging the sealing 圏 can be omitted, and the automated combination of the post process is easier.
6. Because of the bonding of the molten material and the metal insert, the metal insert gap can be designed to be narrower than the press-in molding method, and the reliability of the composite product molding is higher. .
7. Select the appropriate resin and molding conditions, that is, for products that are easily broken (such as glass, coils, electrical parts, etc.), they can also be sealed and fixed by resin.
8. Select the appropriate mold construction, the insert can also be completely enclosed in the resin.
9. After the insert is molded, it can be made into a product with a hollow groove after the core hole treatment.
10. The combination of vertical injection molding machine and manipulator, insert product alignment device, etc., most of the insert molding engineering can achieve automatic production.
Automatic insert molding system design selection considerations
1. Metal insert molding is prone to uneven molding shrinkage, and the limit test of shape and dimensional accuracy of important parts should be done in advance.
2. The metal insert is easily deformed and displaced during the injection process, and the design of the mold and the design of the mold shape for easily maintaining the metal insert should be fully considered. For products whose insert shape cannot be changed, prior testing is indispensable.
3. When the metal inserts are arranged and separated and the conveyor is used, the contact between the metal inserts and the inserts and the vibrating balls may cause slight damage to the surface of the insert, which may affect the quality of the product. The quality tolerance limits should be confirmed in advance.
4. The zigzag shape, the amount of warpage, the difference in material thickness, the difference in diameter, and the difference in thickness caused by gold processing should be measured in advance due to the press working. On this basis, the design and design of the automation device and the design of the mold structure are carried out.
5. The position of the mold gate, the molding cycle, etc., which are predictive of the mold structure, are solved as much as possible or have corresponding improvement measures.
6. It should be confirmed whether the metal insert needs to be preheated or dried. The purpose is to ensure product quality and stability of the molding.
7. The various testing devices installed in the mold are used to ensure the stability of the molding action under the influence of environmental conditions such as heat, force and vibration of the mold. It should be confirmed whether it is used or not.
8. In order to prevent the metal inserts and the fine pieces of the molded product from accumulating in the cavity, the air blowing device can be assembled if necessary.
9. Due to the high investment price of system equipment, it is necessary to fully consider whether it can ensure the production volume after the equipment is operated. In the case of a dedicated machine, it is necessary to ensure that the product has no form to update the premise of continuous production for several years.
10. When using a general-purpose machine, it is necessary to confirm how many combinations of multi-variety and small-volume inserts are produced. If mass production is not guaranteed as a whole, the recovery of fixed assets of one product is difficult. In this case, after replacing a part of the device, it can be adapted to the variety update requirements within a certain range.
11. Determining the insert molding rate, productivity and molding cost conditions, such as the accuracy of the metal insert, the shape of the insert, whether the mold is conducive to the shape of the insert and the shape of the molded article, and many other technical factors.
12. The effective combination of the injection machine, the mold, the automation device and how to function in a short time is the key to determining the automatic insert molding system. It is recommended to consult with manufacturers who have considerable experience and experience.
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Label: Insert Process Features
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