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2003 Course Mould & Die Design

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Total No. of Questions : 12] [Total No. of Pages : 4 P1268 [3864]-384 B.E. (Polymer) MOLD AND DIE DESIGN (2003 Course) Time : 4 Hours] [Max. Marks : 100 Instructions to the candidates: 1) 2) 3) 4) 5) Answers to the two sections should be written in separate books. Draw neat diagrams wherever necessary. Assume suitable data, if necessary. Numbers to right indicate full marks. Use of log tables, electronic pocket calculators is allowed. SECTION - I Q1) Design and draw plan view and sectional side view to bring out the details of feed system, ejection system and cooling system for a two cavity two plate mold for the component shown in fig.1. [35] Material : ABS; Shrinkage : 0.5%; Cavity pressure : 200kg/cm2. OR Q2) Design and draw plan view and sectional side view to bring out the details of feed system, ejection system and cooling system for a two cavity underfed mold for the component shown in fig.2. [35] Material : HIPS; Shrinkage : 0.5%; Cavity pressure : 180kg/cm2. Q3) Calculate the size of runners and gate. Also calculate the size of guide pillar for mold designed in Q.1 or Q.2. [5] OR Q4) Calculate size of cavity and core inserts for mold designed in Q.1 or Q.2.[5] Q5) Explain with neat sketches, the opening sequence for a split cavity mold with stripper plate ejection. [10] OR Q6) Write a note on split safety and split guiding mechanism used in split cavity molds. [10] P.T.O.

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