The creation of a mold begins with a series of design drawings. Engineers need to determine details such as the capacity, wall thickness, handle structure, and stacking design of the plastic bucket based on its end use. For example, buckets used for holding liquids require guaranteed sealing and strength, while buckets used for stacking and storage have higher requirements for the fit between the bucket body and lid, as well as pressure resistance.
After the design is completed, the raw material preparation stage begins. The core material of the mold is mold steel, whose quality directly determines the mold's lifespan, precision, and the surface quality of the final plastic product. Yongkang Baihao Mold Factory typically selects different grades and properties of mold steel based on the production requirements of the plastic buckets (e.g., whether to produce 100,000 or 1 million cycles) and the type of plastic raw material (e.g., ordinary polyethylene or engineering plastics containing reinforcing fibers).
Commonly used mold steels need to possess high hardness, high wear resistance, good toughness, and excellent polishing performance. After the steel arrives at the factory, it first undergoes rigorous inspection, including spectral analysis to confirm the material composition and ultrasonic testing to check for internal cracks or impurities, ensuring that every piece of steel about to be processed is of reliable quality.