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January 12, 2011

Materials and Manufacturing Processes

The following post is a result of querry by bipinzblog
This is answer to Q.9 of CEED 2009. It is related to my previous post  "Quick tips for last minute preparation of CEED"

 Material : Glass
Manufacturing process : Press moulding

Material : Polyethylene
Manufacturing process:  Injection moulding

Material :Porcelain / China Clay
Manufacturing process:  Throwing on a potters wheel, making the handle by hand, allowing to dry in sun followed by glazing then baking in a kiln


 Material : Polycarbonate (assuming it to be a plastic jar)
Manufacturing process:  Centrifugal moulding


Material : Polyvinyl Chloride (PVC)
Manufacturing process:  Injection moulding / Die moulding



Material : Polyethylene terephthalate / Polyethylene
Manufacturing process:  Die casting / Blow moulding / Press moulding


Further information about plastics and their processes can be obtained at this link.
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39 comments:

  1. AnonymousJanuary 12, 2011 at 10:58 PM

    Thanks a lot Prasanna Gadkari...You have done a gr8 help to me....I'm about to appear for CEED...thank u...

    ReplyDelete
  2. AnupamaJanuary 13, 2011 at 12:37 AM

    Hi Prasanna, realy helpful blog. That jug is of polyethylene or steel, am confused.N if its of steel..wot process is used in making steel utensils.One more que, can we use instruments like rulers in questions other than the one of free hand composition drawing.Thanks,reply wil help.Luck is needed..lol

    ReplyDelete
  3. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )January 13, 2011 at 9:02 AM

    Dear Bipin,
    Best of luck for the preparations :)

    ReplyDelete
  4. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )January 13, 2011 at 9:09 AM

    Dear Anupama,

    Thanks for appreciation.

    You know, even i was thinking the same thing, whether the jug is made of PE or steel. Maybe they should improve printing of these papers. What really matters here is your knowledge of materials and manufacturing processes. So, even if u make a valid assumption, that's alright.

    Generally a process called 'drawing' and 'spinning' is used in making metal vessels. A very nice overview can be found here

    About instruments; its no where said that instruments are not allowed, so you can use them. Still from the personal experience i would recommend doing without it. Its much faster and intuitive to finish a free hand sketch anytime.

    Feel free to ask, if u want to know anything else

    Best of luck :)

    ReplyDelete
  5. AnupamaJanuary 13, 2011 at 10:27 AM

    hi Prasanna, thanks for the reply.Am planning to attend PD que.Have a few queries-Is 'form' of a product part of ergonomics?
    And i mess up while i draw the construction details like parts assembly,various joints,and how to play with the form like making the products foldable or sliding parts into one another etc.from where can i get those details (drawings).Thankyou

    ReplyDelete
  6. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )January 13, 2011 at 2:57 PM

    Dear Anupama,

    As the saying goes, 'form follows function' therefore, the form of a product is very closely related to ergonomics. Just think, why your pencil is only so much thick, and so much long?

    The second question you asked is kind of tricky. U can study a few products lying around you. Also, perhaps a quick round of 'attribute method' should help you :) Take an example of types of cell phones: they are sliders, rotating ones, flip-opens, etc. can you take inspiration from these??

    Left you thinking ...

    Best of luck :)

    ReplyDelete
  7. AnonymousJanuary 13, 2011 at 5:14 PM

    Hi, prasanna ,ur blog s very helpful to me..can u pls help me out this que...There is a metal pillar with 100 screws holding it at the bottom, One of the screws always get's broken due to some reasons. How do you solve this issue.

    ReplyDelete
  8. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )January 13, 2011 at 7:44 PM

    Dear shabarish,

    Though i wont ask you where you got this question from, i'd need some more information about the problem. Namely, the diameter of the pillar, the configuration of the screws, the load faced by the pillar and the material of the screws. Given this information, it does not take a product designer to solve it. hee hee

    This brings my sweet memories of Force Motors back to me.

    Thanks for the intriguing question :)

    ReplyDelete
  9. AnonymousJanuary 13, 2011 at 8:08 PM

    hi prasanna...n tat que din mentiontioned anythin..

    ReplyDelete
  10. AnonymousJanuary 14, 2011 at 2:15 PM

    Dear Prasanna,
    Thanks a lot for the help...I wanna ask u some doubts like...There was a question in CEED 2011 Question 6 Animation Design: What does alternate sketches mean? Is it the same character in different poses?

    Question 1.3: Below is an image of a triangle with some pattern on it. This triangle is mirrored four times as shown below. Draw the correct position of the pattern on the last triangle.
    Could you please tell me what is its answer? My guess is that we obtain the same pattern as the first one...

    ReplyDelete
  11. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )January 14, 2011 at 3:26 PM

    Dear Bipin,

    The 'alternate sketches' refer to different representative images you can use of farmer, politician and God respectively. There is also space provided labeled 'Character 1.Farmer' Now just choose one good sketch out of the 3 and make a strip.

    About the triangle problem: instead of telling you the answer, i'll tell you the approach. Just label the triangle in clockwise direction. Say, ABC. Then the mirror edge is always side AB. even label the mirroed triangle as ABC in same pattern. What do you get?

    Best of luck :)

    ReplyDelete
  12. SARAVANANJanuary 14, 2011 at 3:35 PM

    Dear Prasanna,

    Hi i am having doubt in the plastic jar moulding , it can be made by blow moulding ? if so can u plz explain the difference between the blow an centrifugal moulding .

    ReplyDelete
  13. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )January 14, 2011 at 7:56 PM

    Dear saravanan,

    You are correct. The plastic jar can be made by blow moulding too. In blow moulding an inert gas is blown into the a drop of plastic so that it is inflated into the shape of the mould. But this process does often gives a thick base but thin body. Thats why it is common in moulding disposable water bottles that are crushed after use. Whereas, the jar needs consistent properties along its body. Thats why the mould is rotated along with the molten plastic drop till it spreads on the sides of mould very uniformly.

    ReplyDelete
  14. priyaOctober 17, 2011 at 12:53 PM

    Hi Prasanna,I've completed my enginering in Computer Science. Im desperate to join IISC for M.Des. I have started praciticing sketches. Ur blog is so very useful for me

    ReplyDelete
  15. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )October 17, 2011 at 1:05 PM

    Hi Priya,
    I am so happy that you found the blog useful. Hope you reach IISc PD. feel free to post any questions you have. Best of luck.

    ReplyDelete
  16. Abhrodeep MukherjeeOctober 20, 2011 at 1:16 AM

    dear prasanna . me an final yr engg stud wid a passion of arts .. hav a strong hold at sktching ... as i hv been doing it since past 3 yrs and i hav diploma in fyn arts also ... wat now i wud hav to strengthen to crack dat and ceed .. how wil i develop my creativity more .. as i drw mostly human figures .

    ReplyDelete
  17. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )October 20, 2011 at 9:30 AM

    Hi Abhrodeep,
    I feel that the question about developing creativity is a very general question. I have listed a few tips on cracking CEED and DAT, which should guide you. If you have any specific question feel free to ask.
    Best of luck.

    ReplyDelete
  18. Chetan YadavApril 17, 2012 at 2:38 PM

    Hello sir
    In 2007, Q4 asks to show the details with the help of sectional view /exploded diagrams, it also asks to mention the materials recommended for each component. So, if I just mention materials as plastic, steel rubber etc, would that be fine or I need to mention what kind of plastic or rubber it is?
    There was similar ques in 2008, it read "we'll be judged on the understanding of the materials." What does this mean?
    Thank you

    ReplyDelete
  19. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )April 18, 2012 at 12:00 PM

    Hello Chetan,
    For materials question it is not sufficient just to tell what material you can use, because each material has some properties that need to be named. For example, you make blades of steel, because it can take and retain very sharp edge for a long time. Suppose you have drawn an exploded view of a sharpener, you should name the blade like “material : stainless steel, sharpened and polished” And this is the understanding of the material, that will be judged.
    I hope this is what you wanted to know
    Take care

    ReplyDelete
  20. Chetan YadavMay 4, 2012 at 2:53 PM

    Hello sir
    yes, this is all i wanted to know, I have got the exact idea to answer such ques
    thank you

    ReplyDelete
  21. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )May 4, 2012 at 2:56 PM

    Hello chetan,
    Thats nice to hear!
    if u feel i missed out anything, i can include it in the blog

    ReplyDelete
  22. Chetan YadavMay 5, 2012 at 12:29 PM

    No sir, you are not missing on anything. Thanks for asking, your responses on the blog have been spontaneous.

    ReplyDelete
  23. GauthamMay 20, 2012 at 8:04 PM

    hi prasanna! your blog's amazing and really informative, thanks a lot for making it :)
    i've got a que, i'm a 3rd year mech engineering student bt i'm more interested in getting into animation thru CEED. Will my college gpa influence my selection into an animation course at IDC? i've got it around 7.0 and i've got a history of backlogs :(.
    (the blog post on building a portfolio for animation was awesome btw !)

    ReplyDelete
  24. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )May 21, 2012 at 8:11 AM

    Hello Gautham,
    Thanks for all the nice words. On IDC selection criteria, it is nowhere mentioned that your GPA or backlogs are considered. Yet some institutes consider the GPA in case there is a tie between two equally deserving candiadates, though I do not know if IDC does this or not!
    Anyway u must try ur best!!
    Best of luck :)

    ReplyDelete
  25. GauthamMay 21, 2012 at 8:31 AM

    This comment has been removed by the author.

    ReplyDelete
  26. rudnerhopesOctober 19, 2012 at 10:49 PM

    prasanna can u recommend me any books for CEED 2012?????

    ReplyDelete
    Replies
    1. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )October 20, 2012 at 8:52 AM

      Hello rudnerhopes,
      As far as i know, there are no books written specifically for CEED, plz let me know if you come across any. I am also looking
      Besides that, there are a few general books on sketching, design process and idea generation, you can have a look at them in "resources" section of this blog

      Delete
  27. AnonymousOctober 29, 2012 at 9:55 PM

    hello sir,i need ceed solved papers plz mail me .my id:janu.rathore8@gmail.com
    plzzzz sir.......

    ReplyDelete
  28. AnonymousOctober 29, 2012 at 9:57 PM

    please sir m waiting for ur mail sir plzzzz........

    ReplyDelete
  29. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )October 30, 2012 at 8:04 AM

    Hello rathod,
    Sorry to disappoint u buddy, but i simply dont have any solve papers with me. All material i have is posted on this blog.
    If you have any specific doubts plz feel free to ask

    ReplyDelete
  30. UnknownNovember 23, 2012 at 12:54 PM

    Hey prasanna, Loved your blog.
    I m giving Ceed 2013 on 25 nov 2012.So I have been practicing sketching and looking at comic strips and racking my brains at all those design problems.
    well, I m curious on what basis will the comic strips will be judged? also..Q6 of 2008 paper of story telling..do we have to use the images as it is or their positions can be changed..(only scaling,simplifing,repeating is mentioned)
    PLz help..

    ReplyDelete
    Replies
    1. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )November 23, 2012 at 4:07 PM

      Hi NEha,
      The comic strip might be judged on basis of:
      1. clarity with which you present the idea
      2. How well can the reader understand the story
      3. Use of visual symbols, like, showing dashed lines to show a running man
      4. Minimum use of text

      I feel, in that story telling question of crow and sheep, it is given that you should only do the operations mentioned, otherwise you might lose marks :(

      Best of luck

      Delete
  31. UnknownOctober 16, 2013 at 9:40 AM

    HI sir I have doubt over material of that chair .. is that really PVC only? i looked at chair in my house. it is made from poly propylene

    ReplyDelete
    Replies
    1. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )October 17, 2013 at 8:41 AM

      Hi Shwetank,
      You are right. There are multiple solutions to this problem. For example, you can make a bottle of glass, poly ethylene or polypropylene, same applies to chair too! I appreciate that you took efforts to see manufacturing marks on the chair in your house :)

      Delete
  32. dathasaiSeptember 28, 2014 at 10:35 PM

    Hi Sir, Your blog is really informative.please give answer to this question.What is the material used in manufacturing of plastic buckets?

    ReplyDelete
    Replies
    1. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )September 29, 2014 at 8:23 AM

      Hi,
      Thank you :)
      Generally, the high quality buckets, which are often food grade, are made with Polypropylene while the low quality ones are made with poly-ethylene. For the purpose of CEED, i believe both answers would be acceptable

      Delete
  33. YamunaSeptember 29, 2014 at 11:18 AM

    Thank u sir, Pet bottles are best made using ________________ process ? This question is asked in 2014 ceed paper.

    ReplyDelete
    Replies
    1. Prasanna Gadkari (M.Des in Product Design from I.I.Sc. )September 29, 2014 at 11:22 AM

      Hello Munna,
      PET bottles are made by blow mounlding
      You can see the details of the process in this video

      Delete
  34. UnknownOctober 26, 2016 at 12:20 PM

    Nice blog posted here. Shree Tyres provides customer safety and satisfaction regarding tyres. One can buy michelin tyres in pune only at Shree Tyres. Thanks for sharing.

    ReplyDelete

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