| 摘要 |
The invention allows cleaning of poorly accessible machine parts, e.g. in the transport and or moulding of materials in the pasty state by addition of one ore more inorganic or organic solvent(s) and one or more inorganic or organic salt(s) which are soluble therein, preferably as a solution, to the material to be processed. The melting point of the salt(s) is above the processing temperature of the material. The boiling point of the solvent(s) is below the processing temperature of tie material. The invention finds its application in the changeover of material to be processed in plastic processing machines, such as, injection moulding machines, extruders and blow-moulding equipment by accelerating the removal of the previous substance from the plasticizer unit and the nozzle region; an analogous field of use is, e.g. in the operation of kneaders. |
