Sy. Yang et Fz. Huang, UNSTABLE GAS PENETRATIONS IN SYMMETRICAL RIB CHANNELS DURING GAS-ASSISTED INJECTION-MOLDING, International polymer processing, 10(2), 1995, pp. 186-187
During gas-assisted filling, gas penetrations in symmetrical rib chann
els are found never symmetrical. The development of this unsymmetry is
observed and its cause is analyzed. The system of gas penetrations in
melt in symmetrical rib channels is found unstable. Symmetry is upset
upon perturbation. Symmetrical gas-channel ribs in gas-assisted injec
tion molded parts should be avoided.