The main points of SMC mold design and manufacturing in […]
The main points of SMC mold design and manufacturing include SMC mold product classification, processing accuracy, demolding, shearing edges, fillets, heating methods, mold materials, surface treatment and other common problems. Some small details of SMC mold design are for everyone It is very important. This article provides a reference for mold manufacturers to make SMC molds.
1. Thickness of SMC die ejection plate
The thickness of the ejector plate should be determined according to the size, shape and weight of the mold, and its thickness is generally not less than 30mm, otherwise problems such as deformation of the ejector plate are likely to occur.
2 SMC mold heating hole distribution
SMC mold heating hole distribution requirements are that the heating hole should not be too close to the cavity, nor too far away, it is best to maintain 40 ~ 80mm; the distribution of heating holes should be thin in the middle, dense at both ends; SMC mold if using electric heating, heating holes That is, the number of electric heating tubes is preferably a multiple of 3, in order to facilitate power connection, and at the same time, the electric heating tubes at both ends should be beyond the edge of the cavity by a certain distance; the distribution of heating holes should follow the shape of the mold.
3. SMC mold side extraction mechanism
When the side of the product has holes or side convexities and concaves, a laterally shaped core must be used to meet the requirements of the product. The side core must be pulled out before the product is demoulded. SMC mold should avoid side core pulling mechanism as much as possible. If side core pulling cannot be avoided, the core pulling should be as short as possible.
4. SMC mold ejection method
The selection of the SMC mold ejection system is mainly to separate the product from the mold when the press is opened after the product is formed, so as to facilitate the removal of the product. The ejector rod is located in the SMC mold and is driven by some mechanical (or hydraulic) means. These systems include a hydraulic system and a mechanical action system. There are two types of commonly used hydraulic systems, one is the hydraulic system inside the press, and the other is the hydraulic system that is separately connected to the ejection plate on the mold. Among them, when the oil cylinder is ejected from the ejector plate of the mold, ejection imbalance will often occur. The solution is to connect another gear oil separator. The above two systems are suitable and have good effects. Each production unit can choose the appropriate ejection method according to its actual situation.