Dynamic Mold Surface Temperature Control for Molding High Gloss, Painting Free Part Surface Achieving Cycle Time and Cost Reduction

摘要

The study shows the molding of a high gloss surface notebook computer (NB) display support without painting using dynamic mold temperature control. The required mass production rate is 300,000 pieces per month. Both water heating/cooling and induction heating/water cooling were employed to investigate the cycle time, mold and machine requirements. The former requires 60s cycle time whereas the later needs only 36s to achieve a weld line free surface. The associated cost reduction in energy consumption is US$ 23,700 per month, injection machine operation is US$ 52,800 per month, mold making cost is US$75,000 and painting cost saving is US$ 190,500. Annual savings could reach US$3,237,900.