What is the purpose of a blade in container construction?

In container construction, the purpose of a blade is primarily to function as a hinge component for attachment. Blades are crucial in the assembly of containers, particularly in the mechanism that allows doors and other movable parts to operate effectively. They enable the doors to pivot and secure properly, ensuring that the container remains closed and protects its contents during transport.

While other options might be relevant to some aspects of design and functionality in construction, they do not accurately describe the specific role of a blade. For instance, insulation and decorative aspects do not pertain to the mechanical operation that blades govern. Similarly, while structural stability is vital for containers, the blades are more about attachment than directly enhancing the overall structural integrity. Hence, understanding the hinge function of blades clarifies their importance in the context of container assembly and usage.