Micro injection molding is a very accurate injection molding technique that is employed for the construction of very small parts. The technique enables production of parts weighing under one gram. The process involves injection of a very small amount of resin into a mold under high pressure via syringe-sized injection machine, requiring precise control of injection pressure, flow rate, and temperature before cooling and solidification.
Mold Design
Because micro injection molding produces high-accuracy parts, mold construction requires precision tooling. The process employs CNC and EDM (Electrical Discharge Machining) for mold construction. The cooling process within the mold and removal of excess material are critical considerations.
Appropriate Materials for Micro Injection Molding
- Thermoplastic Elastomers (TPEs)
- Polyoxymethylene (POM)
- Polycarbonate (PC)
- Polyether Ether Keton (PEEK)
- Liquid Silicon Rubber (LSR)
Bibliography
- AcoMold. (2024, 4 2). Retrieved from The Complete Guide to Micro Injection Molding: Processes, Benefits, and Applications: https://www.acomold.com/micro-injection-molding.html