Because the wall thickness of fruit crates is not always uniform, and to shorten cooling time for increased efficiency, the design of the cooling water channels inside the mold is crucial.
A well-designed cooling water channel layout ensures uniform cooling of the product, reduces internal stress, and prevents deformation.
The most commonly used plastic raw materials for producing fruit crates are polypropylene and high-density polyethylene (HDPE). Both materials have good toughness, impact resistance, and chemical corrosion resistance, making them suitable for outdoor use.
Polypropylene has slightly better rigidity and higher temperature resistance; HDPE offers superior low-temperature impact resistance. The choice of raw material depends on factors such as the specific usage environment and cost.
Sometimes, a certain proportion of recycled materials is used to reduce costs while maintaining performance, aligning with the principles of a circular economy.
