THERMOPLASTICClick to edit Master subtitle style Mariy Muslih M.
111910101026 M. Dahlas Dzuhro 111910101030 Naufal Firas
111910101036 Henry Wicaksana 111910101040 Yohannes C.
111910101025
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THERMOPLASTIC
Thermoplastic polymer is a polymer which have propertie that it
doesnt keep against hot. If this polymer get heated, then it will
be soft and if we continue to cooling this polymer it will be hard.
The molecule structure is linear or branched not linked.
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TERMOPLASTIKPolimer
termoplastik adalah polimer yang mempunyai sifat tidak tahan
terhadap panas.Jika polimer jenis ini dipanaskan, maka akan menjadi
lunak dan didinginkan akan mengeras. Struktur molekulnya linier
atau bercabang, bukan jaringan.
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THERMOPLASTIC PROPERTIESSmall
molecule weight keep against hot
Doesnt If If
get heated it will be soft get cooled it will be hard melting
point or it can be recycle5/24/12
Flexible Low
Reform-able
Sifat-sifat ThermoplastikBerat Tidak Jika Jika
molekul kecil tahan terhadap panas.
dipanaskan akan melunak. didinginkan akan mengeras. untuk
diregangkan.
Mudah
Fleksibel. Titik
leleh rendah. dibentuk ulang (daur ulang). 5/24/12
Dapat
Polyethylene (PE)Polyethylene
is a material that is include one of thermoplastic polymer. If
this polyethylene get radiated, it will be cross connection.
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Polyethylene (PE)Polietilen
adalah suatu bahan yang termasuk dalam golongan polimer
termoplastik. Jika polietilen diradiasi akan terjadi pembentukan
ikatan silang.
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Mechanical Properties of Various Plastics
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INJECTION MOULDING PROCESSThe process involvesFilling phase,
Switchover point, peak pressure occur after
slight delay.Pressure phase, Cooling phase.
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MOLDING PLASTIC INJECTION5/24/12
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Sequence in the processIt
is desirable to have highest possible filling speed (Injection
Rate) duringfilling phase. phase covers85 to 98%of totalinjection
stroke. speed filling is terminated atSwitch-over pointand low
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Filling
High
Due
to relaxation of compression (1015%) of melt during injection
stroke, melt expands and fills up remaining empty space in the
mould. after the melt has to be cooled further, below heat
defection temperature of material. This would prevent deformation
of moulding during ejection. 5/24/12
There
Urutan ProsesSangat
diharapkan untukmemiliki kecepatanpengisiantertinggi(Ting
katInjection) selama fillingfase. 85sampai 98%strokeinjeksitotal.
tinggidiakhiri di Switch-over point dan 5/24/12
kecepatanfaseTekanan
Mengisifasemencakup
Pengisiankecepatan
Karenarelaksasikompresi(10-15%)
daricairanselama strokeinjeksi, lelehan mengembang
danmengisiruang kosongyang tersisadalam cetakan.
setelahmelelehharusdidinginkan lebih lanjut,di bawah titik leleh
5/24/12 material.Hal ini akan mencegah
SETTING POSITION SPEED AND PRESSURE
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Video
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Thank you
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