The manufacturing process of compact powder cases involves multiple steps, including material selection, component manufacturing, assembly, and quality control. The following is an overview based on relevant information and general industry practices.
Material Selection
Common materials for compact powder cases include plastics and metals. Plastics include ABS, acrylic (PMMA), PP, and PETG. ABS is widely used for components such as the case body and lid due to its high strength, ease of processing, and cost-effectiveness; acrylic is used for high-end transparent components. Metal materials such as zinc alloys are often used for die-casting complex structures.
Component Manufacturing Processes
Injection Molding: This is the core process for plastic components. Molten plastic is injected into a mold to create the case body, lid, and inner liner. Mold precision directly affects product dimensions and surface quality.
Die Casting: For metal components (such as mirror frames or decorative parts), die casting is used, suitable for complex three-dimensional shapes and intricate patterns. Special Technologies: The manufacturing of the compact powder itself may involve powder injection molding, where powder is injected and solvent is drawn out to form the compact. However, this technology focuses more on powder shaping than on the production of the compact itself.
Assembly Process
Internal Structure Installation: The inner liner (containing the compact powder) is integrated with the compact body through a sandwich design. The mirror is usually embedded within the sandwich, and a mounting plate is used to secure the mirror and facilitate its extension and retraction.
Drive Mechanism Integration: If the compact powder case has a telescopic mirror function, a drive mechanism (such as a bevel gear system) is required, which links the movement of the cover and mirror via a rotating shaft.
Surface Treatment: Components may undergo spraying, electroplating, printing, etc., to improve appearance and durability.
Quality Control and Testing: After production, functional tests (such as the smoothness of the cover opening and closing, and the stability of the mirror's extension and retraction) and visual inspections are required to ensure no defects. Components that directly contact the powder (such as the inner liner) must meet hygiene standards.
Notes: The choice of process depends on the product positioning (such as economy or high-end). For example, high-end products may prioritize the use of acrylic or metal. Environmental factors, such as material recyclability, are becoming increasingly important, and some processes are trending towards solvent-free methods.
