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A sanitary survey was under taken to fine out the result of legal or illegal artificial dyes for the food stuffs sold in the market places. The experiment was made toward 152 food stuffs which sold in the market places, including candies, drops, Jellies, etc, which were summerized as follows. 1. Rose Bengal, Auramine, Patent Blue A, Naphthol green and Orange Ⅱ mainly occupy the most of illegal dyes found in the experiment. 2. Legal artificial dyes with red and blue were found in the candies, drops and jellies bearing trade-names than in those without trade-names. 3. Illegal artificial dyes with red and yellow were found in the candies, drops and jellies without trade-names than in those bearing trade-names. 4. Amaranth, Tartrazine and Indigotine mainly occupy the most of legal dyes found in the experiment. 5. In this experiment the classification of legal or illegal dyes for the food sutffs sold in the market place were nineteen.
A UBET program is developed for determining flash the optimum sizes of preform and initial billet in plane-strain closed-die forging. The program consists of forward and backward tracing processes. In the forward program, flash, die filling and forging load are predicted. In backward tracing process the optimum dimensions of initial billet and preform are determined from the final-shape data based on flash design. Experiments are carried out with pure plasticine billets ar room temperature. The theoretical predictions of forging load and flow pattern are in good agree-ment with the experimental results.
An upper bound elemental technique (UBET) program has been developed to analyze forging load, die-cavity filling and effective strain distribution for flash and flashless forgings. The simulation for flash and flashless forgings are applied axisy mmetric and plane-strain closed-die forging with rib-web type cavity. Inverse triangular and inverse trapezoidal elements are used to analyze flashless forging. The analysis is described for merit of flashless precision forging. Experiments have been carried out with pure plasticine billets at room temperature. Theoretical predictions of the forging load and the flow pattern are in good agreement with experimental results.