Material selection: high-quality steel, such as P20, H13, S136, etc., has enough hardness and toughness to reduce wear and corrosion in production.

Design accuracy: Mold design is very important to ensure the dimensional accuracy of the product. Use advanced CAD/CAM/CAE technology for mold design and analysis, optimize product structure and mold making process.

Lunch box wall thickness: It should be uniform and consistent, avoiding being too thin or too thick, to ensure its strength and durability when used.

Cooling system design: The design of the cooling system has an impact on both production efficiency and product quality. The cooling channel should be reasonably laid out to ensure that the mold temperature is uniform to speed up the production cycle and prevent product deformation or stress concentration.

Gate and runner system: Reasonable design of gate and runner system to ensure that the plastic fills the mold cavity evenly and avoids weld lines and short shots. Hot runner systems can increase efficiency and reduce material waste.

Parting surface treatment: The parting surface of the mold should be smooth and burr-free to facilitate demoulding and reduce wear during the production process.

Core pulling mechanism: For the part with depression or protrusion, the mold needs a corresponding core pulling mechanism. It should be designed and manufactured to ensure high reliability so as not to affect production efficiency and product quality.

Exhaust system: It can remove air and gas from the mold cavity and prevent defects such as combustion marks and cavities.

Mold accuracy: The matching accuracy of the mold components and each component should be high to reduce the occurrence of flashing and ensure the long-term stability of the mold.

Mold maintenance: Regular mold maintenance, including cleaning, inspection, lubrication and repair, prolongs the life of the mold and ensures the quality of production.