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A “Wrinkle Gate” is not a molding defect but another name for a cashew or banana gate — a curved submarine gate widely used in automotive injection molding. Its purpose is to hide the gate on parts with strict cosmetic requirements, such as wheel arches, exterior trims, pillar trims and door handles. The curved tunnel allows clean degating and prevents visible marks on the A-surface. However, cashew gates are challenging to machine and often fail if the radius, steel choice or cooling is incorrect, leading to gate breakage or unstable production. This article explains how wrinkle/cashew gates work, why automotive parts rely on them, and what design factors ensure stable long-term performance. Read More

Discover why high-speed CNC machining is critical for manufacturing high-quality automotive lighting molds. This article explores how Guangdian Tech achieves micron-level precision to ensure perfect optical performance and faster delivery times for global automotive clients. Click to see our advanced manufacturing process in action. Read More

A practical 2025 engineering guide to insert molded parts for cars, written from a real manufacturer’s perspective. Learn how insert molding really works, how to choose plastics and metal inserts, key mold design rules, vertical vs. horizontal machines, and what quality control and thermal shock tests look like in real projects. Includes a detailed automotive headlamp case study and answers to common questions about cost, reliability, and supply of inserts. Guangdian Tech shares hands-on experience to help engineers and buyers develop safer, more reliable insert molded parts for automotive lighting and interior components. Read More