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2Â¥2008-02-17 13:33:58
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| According to the research ,the residence time of melt in its slipping section has a relation of exponential decay with its relaxation time ratio and extrusion swell ratio.Its mathematical relation can be expressed by this equation B=1+Ae-t/r£¨A¡Ö0.2~0.8£©.In fact ,melt in the slipping section is in the process of deformation decay.Theoretical analysis and numerical simulation match well,so the equation can be used as a guidence in the design of gas-assisted dies |

3Â¥2008-02-19 14:56:17











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