Beyond fulfilling functional requirements, the large-scale production of daily necessities demands advanced efficiency, directly driving the evolution of mold structures towards greater complexity and standardization.
From Single-Cavity to Multi-Cavity: A single mold can only produce one product per injection cycle, resulting in low efficiency. Modern daily necessities molds commonly employ multi-cavity designs. Mold designers must, within a limited mold area, analyze runner balance to arrange multiple identical cavities, ensuring each cavity is filled simultaneously at the same pressure and temperature. This allows for the production of several or even dozens of identical products per injection, significantly reducing unit costs.
Application of Hot Runner Systems: Traditional mold runners solidify after each injection, requiring recycling as waste. Hot runner molds incorporate heating systems in the runner section, keeping the plastic constantly molten, eliminating the need to remove solidified runner material. This not only saves raw materials and reduces recycling processes but also shortens the molding cycle, enabling more continuous and automated production. This brings significant cost advantages to the large-scale production of daily necessities such as disposable tableware and bottle caps in the Huai'an area.
Automated demolding and mold life: To improve production efficiency, production lines require products to automatically detach after mold opening. Ejection mechanisms (ejector pins, ejector plates) must be installed within the mold to ensure a smooth and deformation-free ejection process. Facing millions or even tens of millions of injection cycles, the selection of the mold's steel, heat treatment processes (such as quenching and nitriding), and surface treatments (such as chrome plating) are crucial. These directly determine the mold's wear resistance, corrosion resistance, and service life, and are key to controlling long-term production costs.
