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2003 Course Die & Mould Design (Elective I)

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Total No. of Questions : 12] P1155 [Total No. of Pages : 3 [3664]-172 B.E. (Production & Industrial Engineering) DIE AND MOULD DESIGN (Elective - I) (2003 Course) (411122) Time : 3 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) a) b) What is yield criteria? Explain any two yield criteria. What are the problems in rolling? Explain it with neat sketch. [8] [8] OR Q2) a) b) Explain the following terms in extrusion : [8] i) CCD. ii) Shape Factor. iii) Form Factor. iv) Extrusion ratio. v) Breakthrough pressure. vi) Discard pressure. Explain various types of wire drawing machines state their advantages & limitation. [8] Q3) a) Explain with neat sketch the different types of presses based on method of actuation of slide with their specific application. [12] b) Draw neat sketch of compound die for manufacturing of washer. [4] OR P.T.O. Q4) a) What is OBI? State its application with advantages & disadvantages.[8] b) What are the different types of die set? Explain with neat sketch. [8] Q5) Design simple die for the component shown in fig. 1. [18] OR Q6) a) Sketch assembly drawing of a progressive die for the component shown in fig. 2 Given : Stock thickness = 1.0 mm [6] Shear strength = 260 MPa b) Draw strip layout & find out material utilization (strip length = 2500 mm). [6] Find out press tonnage with staggering. [2] If full shear is given, what is press capacity. [2] What size of dowels & allen screws are required for fastening? [2] c) d) e) SECTION - II Q7) a) b) Explain important design factor to be considered while designing a forging die. [8] Explain the following with neat sketch : [8] i) Shot blasting & tumbling process for cleaning forging. ii) Isothermal forging. [3664]-172 2 OR Q8) a) b) Explain edging, bending, drawing out (swaging) & trimming operations of forging with neat sketch. [8] Write note on forging equipment : a) Board drop hammer. b) [8] Screw press. Q9) Write short note on : a) Transfer moulding. [16] b) Injection moulding for thermoplast. c) Blow moulding. OR Q10)a) What are the types of plastic? Explain the difference between them.[4] b) How injection moulding machines are specified? Compare vertical & horizontal injection moulding machine. [6] c) Explain basic terminology of Injection mould. [6] Q11)Design a two plate injection mould for component shown in figure 3 [18] OR Q12)a) b) Explain different methods of ejection in injection moulding. [10] What is gate? What factor should be considered in designing gate? And explain any two types of gate used in injection moulding. [8] vvvv [3664]-172 3

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