Abstract: To provide a wash tank which is excellent in washing effect with a simple structure, compact, highly practical and effective in washing small molded parts made of rubber or plastic, the wash tank includes a sealable lid having a washing fluid outlet, a conical bottom wall portion having a washing fluid inlet and a cylindrical side wall portion, having a draft tube in a bugle-like shape a bottom end and an upper end of which are expanded and which is disposed at the inside of the tank and a partition plate arranged at a front face of the draft tube and further provided with a jet stream nozzle at a washing fluid inlet portion where the tank is constituted reversibly.

Abstract: A tank transportation system comprises rails, stations, and a conveying truck moving on the rails between the stations under computer control. The conveying truck suspends a tank, which performs predetermined operations at the station, delivers and/or receives it to and from the station, and transports it to other stations in order. The system is used preferably for producing flowable composites.