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2003 Course Assembly & Maintenance of Printing Machines

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Total No. of Questions : 06] [Total No. of Pages : 03 P1521 [3764] - 309 B.E. (Printing) ASSEMBLY & MAINTENANCE OF PRINTING MACHINES (2003 Course) (408289) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) All questions are compulsory. Answer any one of each question a or b. 2) Questions 1, 2, 4 and 5 have 16 marks and Questions 3 and 6 have 18 marks. 3) Illustrations / drawings should be made to illustrate. SECTION - I Q1) a) Where are lead screws used in printing machines. iii) Where are bevel gears used in printing machines and why? iv) What is the function of an air cylinder. What other mechanical component does it replace. i) In a printing machine speed control systems are used. Explain the reason for the same. ii) What are the types of bearing used in printing machines. Explain the advantage of rolling bearings over sliding bearings. iii) What are the various types of couplings used in printing industry? iv) Q2) a) What are the different types of cams used in printing machines. ii) b) i) Where are pneumatic systems used in Printing industry? i) What are the various mechanical groups of a printing machine? ii) If you do not know the undercut of a machine how would you find out the same? iii) How is the motion on the feeder mechanism on a printing machine changed from vertical to horizontal? iv) What are chain drives commonly replaced with in modern times? Advantage thereof. P.T.O. b) What are the type of dampening systems used in web-fed offset printing machine? Explain any one with diagram. ii) What are the different types of feeding systems used in web offset printing industry? iii) Explain the function of a stream feeder in brief. iv) Q3) a) i) How is the blanket clamped to the cylinder? What is the purpose of daily/routine inspection of a machine? How does it help in keeping the equipment running with minimum mean time between failures? b) What is Proactive Maintenance? How can it reduce the incidence of Breakdowns? SECTION - II Q4) a) What do you understand under Preventive Maintenance? Explain in detail. b) What is to be observed in Lubrication and care to be taken? Explain the different types of lubricants. Q5) a) Q6) a) When assembling a machine what are the basics points to be observed? ii) b) i) Types of lubrication systems? In modern machines often the entire gear and other drive components are encased in an oil bath/oil sprinkler system. Explain reasons for the same. What are the various fasteners used in any machine? List at least 8. ii) b) i) The cutting action of a Paper cutting machine is -------? Explain the reason for the same. What are the principles of Plant layout? Explain in detail. Prepare a layout for a printing press room with following equipment: Explain the work flow. i) [3764]-309 1.4 colour offset machine 2 19 x 26 inches. Area of the machine is 30 feet by 8.5 feet. CPC unit requires an area of 5feet x 9 feet. Ancillary equipment such as compressor, chilling unit etc. occupies an area of 6 feet x 10 feet. ii) 8 feet x 56 feet. Ancilliary equipment requires further 5 feet x 30 feet. 2 single colour offset machines 20 x 30 inches. area required by the machines 6 x 10 feet. I die cutting cylinder machine 25 x 38 inches. area required by the machine is 12 feet x 6.5 feet. Supervisor cabin 812 x 10 feet. Test equipment table iv) 30 x 42 inches. Area required for the machine is iii) 1.4 colour offset machine 8 feet x 4 feet. Storage area for consumables and spares 12 x 20 feet. Prepare the layout taking into consideration the above equipment providing space for working area and work in process. And additional for sanitary facilities, rest rooms based on the total number of workers that would be needed. Explain how you have arrived at the figures. Layout only as a block diagram space is of no consideration. EEE [3764]-309 3

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