H2 - Massachusetts Institute of Technology 2.008 Design and...

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Massachusetts Institute of Technology Problem Set 2 2.008 Design and Manufacturing II Problem Set 2 We would like to distribute our favorite solution for each problem to the class as the official solution so please strive for clarity and elegance. If you would like to type your problem set, the raw L A T E X version of this problem set is available on the 2.008 Web site. Problem 1-1. Injection Molding The gate and runner system that you use to move plastic into an injection molding cavity are critical design parameters. Suppose the polymer material that you are using has a viscosity µ of 950 N s/m 2 under your processing conditions. Suppose your initial gate and round runner system is 3 . 5 mm in diameter and approximately 25 mm long. Your part has a volume of approximately 20000 mm 3 and a projected area of approximately 1800 mm 2 . Your Engel machine claims that it can melt and deliver material at a rate of 165 cm 3 / sec. Assume that there is no pressure loss bewteen the mold cavity
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This note was uploaded on 02/24/2012 for the course MECHANICAL 2.008 taught by Professor Jung-hoonchun during the Spring '04 term at MIT.

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H2 - Massachusetts Institute of Technology 2.008 Design and...

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