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2003 Course Mould & Die Design

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Total No. of Questions : 12] [Total No. of Pages : 4 [3664] - 296 P1319 B.E. (Polymer) MOLD AND DIE DESIGN (2003 Course) Time : 4 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables, slide rule, mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) Design a two cavity two plate mold for component in fig. 1. Draw at least two views with one sectional view to bring out all the details of the feed system, ejection system and cooling system. Material : HDPE; cavity pressure : 250 kg/cm2. total heat content : 171 cal/g. [35] OR Q2) Design a two cavity three plate mold for the component in fig.2. Draw at least two views with one sectional view to bring out the details of feed system, ejection system and cooling system. [35] Material : ABS; Cavity pr : 300 kg/cm2; heat content = 72 cal/g. Q3) Calculate the size of core and cavity inserts for the mold designed in Q.1 or Q.2. [5] OR Q4) Calculate the size of guide pillar for the mold designed in Q.1 or Q.2. Q5) a) b) [5] Write a note on angled lifted splits. [6] State the relation between length of finger cam and opening of splits. Also state the same for dog leg cam. [4] OR Q6) a) With a neat figure, explain any method used for achieving delay in split opening motion. [6] P.T.O.

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