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A bimodal shear rate distribution from multi-melt multi-injection molding

from SPE Plastics Research Online

ulti-melt multi-injection molding was recently developed as an alternative to conventional injection molding. In MMMIM, the first melt partially fills the mold cavity before a second melt quickly penetrates the first melt and drives it to fill out the entire cavity. The second melt then continues to pressurize the first melt, causing it to cling to the mold wall until the two melts are completely solidified. The melt injected first forms the "skin layer," while the melt injected second forms the "core layer" of the molded part. more

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