| 摘要 |
PURPOSE:To clean simply a metal die in a short time without injuring the die by extruding thermoplastic resin material immediately before the extrusion molding of the forming material such as thermosetting resin is finished. CONSTITUTION:For instance, immediately before the kneading extrusion of the forming material such as thermosetting resin is finished, the thermoplastic resins (e.g. polystyrene, polyacryl, acrylic nitrile-butadiene copolymer, nylone cellulose resin, polyetyrene and polypropylene, etc.) which is added with calcium carbonate etc. is extruded. Then, the metal die is dipped into the solution of toluene, etc. |
