SKM754C-69-17102513271_0012.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-69-17102513271_0012.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 15kpsi, 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) You must determine which machine to use for your product, based upon these criteria: . Injection pressure 15 KPST - ANY MACHINE Shot volume (assume 15% scrap for runners and sprue in shot volume) Clamp tonnage Minimum cost b) Clearly draw the mold pull direction in your own sketch or on one of the images, using opposing arrows. (< >). Shot volume - ( 1 15x ( 32 , 08 in 3 ) - 12.460 - Volume = 32.08 cubic inches = 361 892 in ? 7 Either BS 320 am R51 340 12.460 7 A projected = (1 2,46 in ) 2 .330 - 11.800 = 155 252 m' -.100 THICKNESS TYPICAL 4.000 - R1.000 = 15 x10 psi ) (155: 25 212 23287 7 168 Dimensions in inches = 1164.387 tins B1 300 will cost Not factor as me sold , Page 12 of 13 B...
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