SKM754C-69-17102513280_0006.jpg - ME 467 Exam 1 Fall 2017 NAME 3 pt 14 What are the three basic categories of pOIyme rs 75 L’yfl’” V’

SKM754C-69-17102513280_0006.jpg - ME 467 Exam 1 Fall 2017...

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Unformatted text preview: ME 467 Exam 1 Fall 2017 NAME: 3 pt 14. What are the three basic categories of pOIyme rs? 75:"?- L’yfl’” V’ If” {’2 at“; if“ (1744. r;- ,ac», f‘ {£2 (3 if}? .‘M .é r 4 pt 15. The equations for pressure in metal direct extrusion differ from indirect extrusion by the term 2L/Do. a) For which extrusion process is it a factor? b) What physical phenomenon does this term represent in the equations? Be specific in your answer. 3;) Z/ (rm? 5 f [EX If": still) ’1 b) Fri/1., {1 47 i!“ C: Liz/{3" “"1421 I I” 79,34, (“F/‘3 ( B i 2 pt 16. If you are conducting direct metal extrusion, and the die shape factor K; = 1.0, then what must be the geometric shape of; your die opening cross-section? 1’ ‘ \ ’2 l 2 9 /' v' ? ~ C-\ ox ’ .'- (“1%) 7i!" ./ PT} i , ’’’’’ ':> Z .5: t4 /7 I“ C K H (1 ‘1; l at C t: ,/ / Iii-{— ’1 “"7 57¢ C, K MAD (33* //4: C .1 ,A (w ( 2r” 7 pt 17. Match the description with the correct process. Description Process Match 1 A Forming a polymer sheet around a pattern (mold) with air pressure Blow Molding 7 L) B Squeezing a charge of thermoset material between two dies or molds. Extrusion C r_ C Making a linear product (metal or polymer) with constant cross—section. Die casting __l_ 1:. _ D 4. One of the most common methods of producing polymer bottles Compression Molding L 3 E Injecting liquid metal under pressure into a cavity Lost foam casting F: J F Pouring liquid metal into a mold and evaporating the pattern inside Impression forging C" Pressing a metal into metal dies so that it exceeds its yield strength, Vacuum a); G taking on the shape of the dies. Thermoforming Page 6 of 13 ...
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