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Home Work _4

Home Work _4

Q Q1. True or False Questions (put “T” or “F” below for each questions, each 4 points, total 40 points) 1.The mold typically influences the molding cycle and efficiency as well as the internal stress levels and end-use performance of the molded parts. 2.To justify its high cost, the mold should withstand hundreds of thousands of high-pressure molding cycles. 3.The part ejection mechanism usually is on the stationary mold half. 4.___ One of functions for the cold slug well is to balance the melt flow during the mold filling, apart from receiving the cold slug formed at the nozzle tip. 5.Typically, a linkage system between the three major mold plates controls the mold-opening sequence.

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1.T___ The mold typically influences the molding cycle and efficiency as well as the internal stress levels and end-use performance of the molded parts. 2. ___T_ To justify its high cost, the mold should withstand hundreds of thousands of high-pressure molding cycles. 3. __F__ The part ejection mechanism usually is on the stationary mold half. 4. _F___ One of functions for the cold slug well is to balance the melt flow during the mold filling, apart from receiving the cold slug formed at the nozzle tip.