The biggest challenge for electric toothbrush handle shells lies in minimizing material usage to achieve lightweight design while ensuring the shell can withstand daily drops and internal motor vibrations.
As the area where heat is concentrated in the mold, the cooling efficiency of the runner directly affects the solidification speed of the melt and the demolding time.
In recent years, high-gloss, paint-free injection molding technology has become the mainstream trend in power bank shell manufacturing due to its advantages of "one-piece molding, environmental friendliness, durability, and outstanding texture."
The temperature drop of the melt in the runner needs to be controlled within a reasonable range to avoid insufficient filling or short shot due to premature solidification.
In 3C electronic products such as smartphones, laptops, chargers, and routers, the housing is not only the product's "outer garment" but also the first line of defense for safety.
Through continuous iteration, a highly efficient design for the power bank shell mold venting structure was finally achieved.