(1) MITSUBISHI ELECTRIC CORPORATION - Hyogo - Japan
In recycling system for used home appliances, recycled plastic flakes are processed into pellets before injection molding. Omission of the pelletizing process brings cost reduction and energy reduction. To omit the pelletizing process, it is necessary to improve color difference caused by recycled plastic flakes which have more than one kind of colors. By using screw preplasticating injection molding machine with twin screws, the color difference is improved. The percentage of color difference confirmed on plates made of recycled Polypropylene flakes decreases in 10% from 70%.