Abstract:
The wall clock manufacturing process studied in this project consists of 8 subunits and consumes a variety of plastic pellets as major raw materials. The clean technology procedures were carried out only 3 steps, i.e. a preliminary opportunity survey, an intensive opportunity study and a feasibility study. The study of electricity and water consumption were omitted because of no precise meter installation. After the preliminary survey, it was found that there was a lot of rejected plastic spare-parts costing approximately 148,000 baht/month as well as the wastage of plastic bags and packaging were also recorded. The huge wastes of rejected spare-parts were generated from plastic injection subunit. After the intensive and feasibility study in plastic injection, a number of alternative technics were found out and classified as an immediately practical technic and a possible technic. The proposed practical alternatives were staff training to build up a waste-minimize consciousness and work-skill in machine set-up and runner cutting. In addition, a manufacturing schedule arrangement and a machine/mold maintenance were also included. The possible alternative which needed further study before implementation should be plastic pellet supply by pipe system, partially using of rejected spare-parts in injection ingredient, modern machine procurement, mold design and consecutive production line.