Based on the characteristics of composite materials and practical experience in the production process, this paper summarizes and organizes the key planning factors for the required molding molds for SMC technology, and elaborates in detail from multiple aspects, analyzing the key planning and control factors for SMC molds. SMC molding process is an advanced composite material molding method, and SMC molds are the foundation of SMC process. Good product quality is ensured by reliable molds. Therefore, in the planning of SMC molding process, the planning of SMC molds is particularly important. In the SMC mold planning process, the mold cavity should be planned based on the specific dimensions of the product. In addition, suitable materials should be selected based on the surface quality requirements and demand size of the product.

In order to ensure the quality of the product and the feasibility of the process, the cutting edge and ejection system of the mold should be reasonably planned. SMC molding materials are somewhat different from general thermoplastic and thermosetting injection molding, mainly due to the lower shrinkage rate of SMC molding materials, so there should be some variation in the planning of SMC mold dimensions.

 

SMC molding materials are produced by specially designed hydraulic presses through compression molding. The performance and accuracy of the press, as well as the planning of the SMC mold, are directly related to the accuracy of the formed product. The SMC molding process is mainly achieved through the press and SMC mold. The molding pressure of SMC molding materials is generally between 2.5-10.0MPa, and for sedan grade SMC products, the molding pressure can be as high as 12.0-15.0MPa. Therefore, there are high requirements for the rigidity and parallelism of the press, which will have a serious impact on the dimensional accuracy and surface quality of the molded products. Especially for large-scale production of products with high repeatability and precision. Other presses require adjustable fast closing/opening speed and slow closing/opening speed to meet different SMC forming needs, reduce or eliminate product deformation and surface defects.

 

The article is sourced from SMC molded products manufacturer: http://www.jmlicheng.com/