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Dr. Siti Mastura Md. Ishak & Dr. Saiful Hasley Ramli

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Dr. Siti Mastura Md. Ishak & Dr. Saiful Hasley Ramli

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Hi Class, Its been awhile.

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1) Take a selfie  with your mom or anyone near you and upload your pic under the number label provided. 1 label = 7 person only.

3) On your picture:
- Write down your name .
- Write the location where you are.
for you attendance.

5) Then, look into the Pembelajaran Maya / Online Class:

i) Video 1 - Vacuum Forming Ep. 1 - Pengenalan /Introduction

i) Video 2 - Vacuum Forming Ep. 2
- Proses Vacuum Forming / Vacuum Forming Process

6) Based on the video, Visual Drawing & instruction given, please do your task individually.

7) Refer PutraBlast for submission.

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your opinion:
1) Why do you think rigid plastic book cover can be used as vaccum material?
2) Why the material get saggy when its heated?
3) why undercut on mould is not recommendable?

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Kamunting, Perak

1)  because can be heated and made pliable, and once cooled is rigid again.
2) molecules are heated expand and start moving aggressively , hence why the material expand and become saggy
3) because will be hard or impossible to remove from the mold without damage.

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MOHAMAD SYAMIL BIN MUHAMED BASIR   TAIPING, PERAK

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MOHAMAD SYAMIL BIN MUHAMED BASIR   TAIPING, PERAK

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NURUL HUDA BINTI AHMAD KAMAR
201863
RAWANG SELANGOR

1) can be heated and easy to use.
2) the material heated because of the temperature, so it will be saggy once we heat it.
3)it will be hard to pull it out from the mold.

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Intan Liyana Binti Bujang 204650
Pasir Gudang, Johoooor

1. It is pliable when heated.
2. The heat make it moves easily and freely.
3. Going to damaged the outcome.

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muhammad aliff iqbal bin ramlan
klang, selangor

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Lot 5985 Kg Sungai Soi, 25150 Kuantan, Pahang

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Norsyamira izzati binti shaharul anuar
Gombak, Selangor cCC

1) Because plastic rigid book cover can easily be formed once heated and stay its shape once cooled.
2) The molecules of the material can move around and expand the original shape of the material.
3)  Hard to remove from the mold without creating any unnecessary damage.

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Nurul Jannah Bt Yahya, salam ramadhan
1)rigid plastic pliable after heated nd easy to bend be shape
2)When temperature increase, the space between increased make the material saggy
3)the outcome will be bad nd damage

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hahaha....what happen to you? kena electric shot ke?

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Chua Wei Liang
201985
Kelantan
1)because rigid plastic book cover is pliable after heated and easy to be shape
2)because plastic is a polymer so it will get saggy when heated
3) it will spoil the product

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Siti Nur Syafira
Kamunting, Perak

1) Because it's easy to bend
2) Heat transfer and the material will get saggy
3) Because an indection can prohibits the ejection of a part from a mold

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what the liang

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Aminatul Adilah binti Amir Ihsan 201860  Cheras, Kuala Lumpur

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Aminatul Adilah binti Amir Ihsan 201860  Cheras, Kuala Lumpur

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1) Rigid plastic book cover is pliable when heated.
2) Heat allows the polymer chains in the plastic to move freely.
3) It will damage the form of the mould.

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TRONOH,PERAK
1) Because it is pliable when heated.
2) Because when it is heated the molecule will start actively expanding and moving active.
3)because this prevents the possibility for sink and warp.(without damage)

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... haa.. da
mandi lom semua ni

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Jovic haymanath a/l Harindranath
Parit Buntar, Perak

1.rigid plastic can be bend after we heat it..
2.the temperature expands it's surface and It becomes saggy
3.  There will be scars on the surface of the material after getting it pulled out.

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Ampang, Selangor

1. easy to bend and form shape when heated, and once cooled can be rigid again
2. molecules of materials will vibrate faster and the space between atoms will increase, then the material will get saggy due to high temperature.
3. hard to remove once the material mold

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Mushrifah Muskhazli
Bangi, Selangor
1) It can withstand high temperature that permits it to be stretched on a mold and cooled to a finished shape
2) The molecular motion is faster when it is heated as the space between atom increased which make the material become saggy
3) To prevent the finishing shape to be broken

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LIM YONG WEI 204267sEREMBAN, nEGERI sEMBILAN

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LIM YONG WEI 204267sEREMBAN, nEGERI sEMBILAN

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1) pliable and easily to get
2) molecules inside expanded
3) its may  cause damage to the vf

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Muhammad Fakhrullah Bin Mohammad Hizal
Kuala Lumpur
1. Because it made pliable
2. Molecules inside the material expand when be heated and it become saggy.
3. Will damage the final outcome

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LIOW RUOH BING 203369
SEMENYIH SELANGOR.

In my opinioI, I think that vaccum forming is the cost effective techniques because it use low pressure so only relatively low cost equipment and low pressure mean that mould can be made of inexpensive materials and in a short time. Well, it's an interesting topic today !

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Nurul Nuha, Penang, Malaysia

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nursyazawafaa binti mohamed safine
kamunting,perak

1)because the plastic cover can be heat easily and can be rigid again when it cooled
2)because the material is soft
3)because hard to remove from the mold without damage

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GAN CHENG ROU
201864
Tangkak , Johor
1)I think rigid plastic book cover not suitable because it was thin
2)because plastic will soften or metl when heating
3)because hard to ejected from the mold without damage

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amboi fira..wirid dhuha tak abis lg ke....doakan saya sekali

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amboi fira..wirid dhuha tak abis lg ke....doakan saya sekali

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Good morning dr....😊

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kedah

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soo handsome waaa

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you must have 7 person in every level ya

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you must have 7 person in every level ya

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Mnetau ad nak hntar lauk

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Raja Zahidah bt Raja Kamaruzaman
Bangi, Selangor
1) Rigid plastic book cover is pliable when heated
2) Plastic is a polymer which is when being heated, the bonds between the polymer will break and the molecules will slide to each other.
3) It will damage the outcome

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Muhammad Aliff Haiqal bin Mohd Azran
Pekan Pahang

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Polisterin jadi dah

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Melaka Tengah, Melaka.
1)because after the rigid plastic book cover is heated, it can bend easily and fit to any shape of the mold we make.

2) because high temperature make the molecule movement in the material faster and expand its surface in limited space, this is where the material become saggy.

3) there will be marks or scars on the material's surface after pull out

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Muhammad Nazrin Bin Ramlan
Banting

Sorry dr lambat. Solat dhuha tadi

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Nak potong dgn member tp member takut kena covid hurmm

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hi magneto...nak nama melayu ye ..hehe

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Negeri sembilan

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Pkai helmet level brp pun saddiq ttap knock awal

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Kamunting, Perak

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Hutan Melintang, Perak
1) easy to bending
2) because of the temperature and molecul in the material
3) once the material mold, it will be hard to remove

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Sungai Petani, Kedah

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1.）  it is an easily formed and machined, tough, low cost for thermoplastic with high impact .
2.) more heat , less sagg and heat exchangers the assembled units are heated either or it  immediately apparent that sagging in these materials  is not a simple thermally activated .
3.)  Design for injection molding  has clear rules: Add draft.no undercut . Round edges. Clear parting lines. Uniform walls,not
too thick.

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Good Morning Dr
Sarasvathy Morthy
Klang, Selangor
1. Rigid plastics are easily formed and machined.
2. The higher the temperature, the more the chances for it to get saggy.
3. To prevent any damages on the mold,maybe.

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Saundarya a/p Saran
Taiping,Perak
1.Rigid plastic is low cost with high impact strength

2.because high temperature that make expansion increases the slack between transmission line structures on molecule movement,causing them to sag.

3.it will leave damage and scars on the surface

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Johor Bahru

1) Rigid plastic are taught and ideal for molding.
2) The shape of molecules expand when get heated.
3) Because its hard to remove from the mold

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Mohd faris haikal bin shahrin
201982
Kulai johor

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Er Qian Gang
204263
Muar Johor

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awak berminat tak tawaran jadi model kurta

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Selfie lagi ke??? 😂😂😂😅😅😅

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Rhu Renggeh, Terengganu.

1. Because it can be easily shaped (into what ever form necessary) with heat, then will maintain a fixed form when it cools down.

2. As the material gains heat, it gains energy, thus overcomes it's solid state and enters a solid-liquid state, and so becomes soggy.

3. To prevent kecacatan on the final product.