| 摘要 |
<p>1496657 Automatic control of dye constituents SANDOZ Ltd 9 Jan 1975 [11 Jan 1974] 01307/74 Headings G3N and G3R An automatic metering and mixing arrangement is controlled to admit at least one component of the final mixture into a mixing tank and then measure its concentration so that the deviation of the component concentration from the required concentration in the final mixture can be determined and a further amount of the component, calculated to not completely eliminate the error, is added and the cycle repeated until the required concentration is obtained. The arrangement described is used for producing a dye liquor from a plurality of dye components metered into a solvent contained in mixing bath 9 by heads 2a, 2b, 2c under the control of a data processing unit 4 which has a manual device 10 for pre-setting the required component concentrations and is sequenced by record 11. The analysis is performed by spectrophotometer 5 which determines the extinction of a diluted solution drawn from the mixing tank. The cycle commences by admitting 90% of the required dye components into tank 9 and measuring the concentration of each component and calculating the deviation of the concentration from the final required concentration. The processor 4 then instructs the admission of an amount of component which will reduce the deviation by 80-90%. The cycle is repeated two or three times when the final dye liquor should be substantially correctly proportioned regardless of the purity levels of the component dyes.</p> |
