1) Cavity-structured pulp packaging trays: These trays are produced using composite molds, resulting in a structure featuring enclosed cavities or small, open-topped containers. Beyond the inherent strength and toughness of paper products, they can be molded into complex shapes to form specific cavity structures. Requiring specialized molding machinery for production, these trays often serve as containers. Common examples include egg trays and egg cartons; the combination of cavity structures and reinforcing ribs significantly enhances container strength, making them suitable for the long-distance transport and handling of eggs.
2) Rimless pulp packaging trays: The "rim" refers to the section extending from the structure's outer edge to its sidewall, located on a surface parallel to the molding template's working face; the rim dimension is the width of this section. In rimless designs, the actual rim dimension is less than 2mm. The lateral cushioning effect is achieved through the overall tray design, where peripheral sidewalls can be angled or perpendicular to the load direction, allowing the angle to be adjusted to obtain the desired cushioning performance.
3) Small-rim pulp packaging trays: In this design, the rim dimension typically ranges from 8 to 15mm. The load-bearing and cushioning capabilities along the rim depend on the rim length and available deformation space; these trays are primarily used for securing and cushioning lighter items like fruits used fruit packaging containers
4) Flanged-rim pulp packaging trays: In this design, the rim extends outward to form a skirt-like flare, creating a more complete-looking outer sidewall. This configuration is ideal when the packaged product needs to contact the "mesh side" (the side formed against the mold screen) to ensure dimensional precision for fit and security, while simultaneously presenting the smoother mesh side on the exterior. Regarding the flange structure, the flange height can be either a fraction of the mold body's height or equal to it; this dimension depends on the packaged product's structural characteristics and weight, the specific type of pulp-molded cushioning, and the total height of the pulp mold structure.
5) Heavy-duty structural pulp packaging trays: While many assume pulp molding is unsuitable for heavy products, the technology is already widely used in this sector. Heavy-duty pulp packaging trays are specifically designed to bear significant loads. To achieve the necessary load-bearing capacity and overall rigidity, the mold structure is engineered by either increasing the thickness of the mold body or increasing the density of the structural elements along its sides. These heavy-duty pulp packaging trays are primarily used for packaging heavy items and for securing products during transport.
Qingdao Perfect Equipment, specializes in the manufacture of pulp molding machines and automatic egg tray making machines, drawing on over 20 years of industry experience. Supported by a team of highly experienced after-sales installation engineers, we have successfully served clients across more than 70 countries and regions worldwide. We ensure a continuous and stable supply of egg tray machines and paper pulp machines and spare parts, providing comprehensive, one-stop customized solutions to customers around the world !
