SKM754C-69-17102513270_0011.jpg - ME 467 Exam 1 Fall 2017 NAME 4 pt 23 You are to make the product noted in the drawing below using injection molding

SKM754C-69-17102513270_0011.jpg - ME 467 Exam 1 Fall 2017...

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Unformatted text preview: ME 467 Exam 1 Fall 2017 NAME: 4 pt 23. You are to make the product noted in the drawing below, using injection molding. The material used is polystyrene, which has an injection molding pressure of between 10 kpsi to 5kpsi. You have 4 machines to choose from; the higher the model number, the higher the cost to use the machine. The machine specs are summarized in the table on the next page. Only one product is made in the mold at a time. You want to use the lowest cost machine possible. a) Clearly draw your desired mold pull direction in your own sketch or on one of the images, using opposing arrows. ( 7). b) Designate the proper machine to use, based solely upon these three criteria. Show your work for full credit. Injection Pressure : 15, 000 PSF Any machine in list. . Shot volume (assume 15% scrap for runners and sprue in shot volume) . Minimum machine cost CLAMPING Force. Vshot = (15 , 5 2 in ? ) ( 1504100% ) = 17. 848in 3 Anymachine in list $ 14.059 WCHES Volume = 15.52 in^3 A projected = TI De - (14, 04 9 in ) TT 4 TOP A = 135, 238 in2 ISOMETRIC VIEW 5.06 = FRONT FCLAMP PAp - (15 *10 (Psi ) ( 155, 237 13) mold pull , or 2000 pounds = 11 64, 286 tons ton Page 11 of 12 OnLy Largest Model: B51300...
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