Digital Accessories Injection Molding Service Process
Digital accessories (such as mobile phone cases, protective covers, TWS earphone cases, adapters, etc.) are one of the common and typical product categories in injection molding. This document analyzes the process, key points, material selection, and industry trends of digital accessory injection molding.
I. Core Process of Digital Accessories Injection Molding
1. Product Design and Review
• ID Design: Industrial designers complete the design of appearance, styling, and color matching.
• Structural Design: Structural engineers use CAD software (such as Pro/E, UG) to design the internal structure, buckles, assembly relationships, wall thickness, etc. DFM (Design for Manufacturability) review is crucial and requires joint confirmation with the mold manufacturer to avoid design defects.
2. Mold Design and Manufacturing
• Mold Design: Mold engineers design the mold based on the product's 3D model, including parting lines, gating system (gate), ejection system, cooling system, and venting system.
• Mold Materials: Commonly used steel materials include 718H and S136; mirror-polished steel is used for high-gloss and transparent parts requiring higher precision.
• CNC Machining/EDM/Wire Cutting: Various components of the mold are manufactured using precision machining techniques.
• Mold Trial and Modification: After the mold is initially completed, a mold trial is conducted to check for defects such as shrinkage, flashing, short shots, and flow marks in the product, and the mold is repeatedly modified until the sample is qualified.
3. Injection Molding Production
• Raw Material Preparation: Plastic granules (such as PC, ABS, TPU) are dried as needed to remove moisture.
• Injection Molding Machine Settings: Appropriate process parameters such as temperature, pressure, speed, and time are set according to the material and product.
• Injection Molding Cycle: Mold closing → Injection → Holding pressure → Cooling → Mold opening → Product ejection.
• Post-processing: Including gate cutting, screen printing, spraying, UV coating, assembly, and other secondary processing.