Compartment Metal Box is a functional metal packaging box with built-in independent partitions and multi-grid storage space. Different from ordinary integrated single-grid tin boxes without separators, it meets the demand of classified storage through humanized partition packaging structure and multi-dimensional accurate bending angle technology. It is widely used in classified storage of candies and chocolates, sorting health care tablets, storage of small hardware accessories, partition placement of scented wax tablets, classification of jewelry and other scenarios. Compared with ordinary single-grid tin boxes, compartment metal boxes have more complex structures. Manufacturers need to balance the overall appearance and commercial packaging texture of outer packages, and control various forming angles of internal multi-layer partitions and multi-surface splicing. Slight angle deviation will directly cause irreversible problems such as skewed partitions, uneven partition gaps, unclosed box body and unbalanced grid capacity. Focusing on integrated partition packaging design and full-field process angle control, this article comprehensively analyzes the packaging advantages and precise angle production technology of Compartment Metal Box, and highlights the production difficulties and core product competitiveness of compartment tin boxes compared with conventional tin boxes.

　　In terms of foreign trade commercial packaging, Compartment Metal Box adopts a complete internal and external integrated packaging system, meeting three major packaging demands including terminal display appearance, product protection and brand customization, and adapting to full-channel shipments such as supermarket retail, cross-border e-commerce, gift customization and enterprise bulk procurement. The outer box adopts thickened matte laminated color printing technology, which is wear-resistant and scratch-proof to avoid friction scratches during cross-border sea transportation, and maintains complete and bright patterns after long-term storage. Customized services such as full-page high-definition color printing, partial hot stamping/silver stamping, frosted touch process and brand logo embossing are available. Exclusive visual packaging design can be made according to different product styles to improve shelf display attraction. The inner wall is coated with food-grade protective coating instead of bare metal, which is odorless, harmless and compliant with EU food contact safety standards, safe for direct contact with food, jewelry and medicines. Meanwhile, exclusive shockproof paper trays are equipped for each grid to fit the partition structure perfectly, preventing internal partitions from deformation under pressure during long-distance transportation and multiple transshipments. A complete closed-loop packaging protection system is formed from outer packaging to internal partition protection.

　　Due to the complex multi-grid structure, Compartment Metal Box has much stricter requirements on forming angles than ordinary single-grid tin boxes. Five key positions including outer box wall, internal partitions, partition joints, lid occlusion parts and bottom supporting parts require independent standardized angle control. Any angle error will damage the overall structural stability. The outer box wall adopts standard 90° vertical bending angle to ensure a neat and upright box appearance, unified display effect, and good adaptability to automatic packaging lines and bulk stacking storage, balancing beautiful appearance and universal applicability.

　　The core technical difficulty lies in the multi-angle design of internal partition baffles. We customize five exclusive precise angles targeting common usage pain points of compartment tin boxes, solving common defects such as loose partitions, uneven grid size, stuck opening and closing, and sharp partition edges. Firstly, internal partition vertical bending angle: all internal baffles adopt standard 90° vertical bending angle with offset plate bending rebound stress, ensuring all baffles stand vertically without tilt or offset and equal capacity of each grid. Secondly, partition splicing angle: the joint between baffles and box bottom adopts 5° inward transition angle, avoiding sharp gaps caused by right-angle splicing, preventing small items from being stuck in gaps and facilitating cleaning, as well as strengthening connecting firmness to prevent fracture under long-term stress. Thirdly, lid closing angle: the box mouth adopts 7° slightly inclined occlusion angle matching the concave-convex lid structure, ensuring uniform stress around the lid during closing and avoiding lid warping and poor sealing caused by raised internal partitions. Fourthly, corner protection transition angle: 42° arc passivation angle is adopted for all box corners and partition edges to eliminate sharp edges and corners completely, preventing hand scratches and improving daily use safety. Fifthly, bottom bearing angle: the double-layer box bottom adopts 9° outward supporting angle to enhance compression resistance and prevent internal partition deformation under pressure during multi-layer stacking.

　　Considering the complex structure of compartment tin boxes, we further tighten the overall angle error standard. The error of all bending angles of outer box walls and internal partitions is strictly controlled within ±0.08°, far better than the industry conventional tolerance of ±0.6° for common compartment metal boxes. A special angle detection process for partitions is added during production. Besides conventional box appearance inspection, verticality of each internal baffle and uniformity of splicing gaps are tested separately to prevent defective products from delivery.

　　With refined partition packaging scheme and strict full-range angle process control, Compartment Metal Box effectively solves pain points such as odor cross-contamination, messy storage and inconvenient classification. It features exquisite commercial outer packaging and stable and durable internal partition structure. Full customization of partition quantity, box size and printing patterns is supported, making it a top choice for classified storage metal packaging.