Unlike molds for traditional thermoplastics, SMC/BMC molds require the incorporation of electric or oil heating channels. A well-designed heating channel layout ensures a uniform temperature distribution, allowing the material to heat evenly throughout the mold. This facilitates simultaneous curing, minimizes thermal stress, and effectively prevents molding defects such as cracking and warping.
Due to the glass fiber reinforcement within SMC/BMC materials, mold wear is greater than that associated with thermoplastics. Consequently, appropriate materials must be selected during the design phase to ensure the mold's service life.
Regarding structural design, it is essential to anticipate potential molding defects-such as flow lines in deep-cavity parts or cracking in components with varying wall thicknesses. Implementing professional design strategies from the outset significantly improves the product pass rate. Whenever feasible, a multi-cavity mold design should be adopted to enhance production efficiency and reduce manufacturing costs.