Automatic Insert Injection Molding System Design Selection Considerations

- Jul 01, 2019-

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. Where 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 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 due to gold plating processing of the metal insert due to the press working should be measured in advance. On this basis, the design selection of the automation device and the design of the mold structure are carried out.


5. Mold gate position mode, 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 aim 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 the 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, the accuracy of the metal insert, the shape of the insert, whether the mold is favorable for insert molding and shape of the molded article, and other technical factors.


12. The effective combination of injection machines, molds, and automation devices and how they function in a short period of time is the key to determining an automated insert molding system.


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