BAHAN AJAR
MATA KULIAH
TEKNOLOGI MEKANIK
II
DTM 2101 (2 SKS)
Disusun Oleh : I. Aris Hendaryan!" S.T. Ir. Gre#. S$%ar!n!
&ROGRAM ST'DI TEKNIK MESIN SEKOLAH OKASI 'NI(ERSITAS GADJAH MADA 2012
DA)TAR ISI
DAFTAR ISI
2
BAB I
PE PENDAHULUAN
3
BAB II
PROSES NON KONVENSIONAL YANG TERMASUK KELOMPOK PROSES MEKANIS ME!HANI!AL PRO!ESS"
BAB III
#$
PROSES NON KONVENSIONAL YANG TERMASUK KELOMPOK PROSES KIMIA
3%
BAB IV
ELE!TRI!AL DIS!HARGE MA!HINING
%2
BAB V
PROSES PEMBENTUKAN PRODUK PLASTIK PLASTIC PLASTIC MOLDING & FORMING"
&'
2
BAB I PENDAHULUAN
3
4
5
Gambar 1.2. Klasifikasi Proses Non Konvensional
6
7
8
9
10
11
12
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14
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16
BAB II PROE NON KON!ENIONAL "ANG #ER$AUK KELO$POK PROE $EKANI %$E&HANI&AL PRO&E'
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
BAB III PROE NON KON!ENIONAL "ANG #ER$AUK KELO$POK PROE KI$IA III.1 &HE$I&AL $A&HINING %&H$'
35
36
37
38
39
40
41
III.2 ELE&#RO &HE$I&AL PRO&EE
III.2.1 ELE&#RO &HE$I&AL $A&HINING %E&$'
42
43
44
45
46
47
48
III.2.2 ELE&#RO &HE$I&AL GRINDING %E&G' 1. PENDAHULUAN
49
2. PRINIP DAAR E&G
50
51
BAB I! ELE&#RI&AL DI&HARGE $A&HINING
52
53
54
55
56
57
(.) RANGKAIAN LI#RIK DAAR DARI ED$ DAN PRINIP KER*AN"A
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
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80
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83
BAB ( &ROSES &EMBENT'KAN &ROD'K &LASTIK ( PLASTIC MOLDING & FORMING )
1. Maeria* Ter+!,*asi%
M()e*i(l )e*+,-l(s)i. /(n0 1i0un(.(n un)u. +e+2u() -*,1u. -l(s)i.3 1i-*,1u.si 1(l(+ 2en)u. 2u)i*(n4 Be*+(5(+ 6enis +()e*i(l )he*+,-l(s)3 si7()8si7()n/( se*)( (-li.(sin/( 1(-() 1ilih() -(1( )(2el %4#4
G(+2(* %4#4
M()e*i(l Te*+,-l(s)i.
Ta-e* .1. T/er+!,*asi0 Maeria*s.
Material Polypropylene PP Homopolymer PP Copolymer
Abbr.
Properties
PP HPPP
Good chemical resistance Semi rigid, durable
CPPP
Good gloss, texture possible, low cost
Typical Applications Packaging, containers Small domestic appliances eg kettles Large automotive parts, plates and cups for children and picnics 84
Polyethylene P Low $ensity P High $ensity
P L$P&LL$P H$P
Polystyrene General Purpose High *mpact
PS GPPS H*PS
-crylic -crylonitrile 'utadiene Styrene #ylon 1Polyamide2 -cetal
P..-'S
PP3.
Good chemical resistance, flexible or semi rigid depending on grade! "eatherproof, good low temperature performance! #on toxic! Low cost 'rittle, transparent! Poor () stability! H*PS up to +x impact strength of GPPS
/igid, clear, glossy, good weather resistance /igid, opa0ue, tough, good gloss, texture possible /igid, tough, hardwearing /igid, tough, springlike, good wear and electrical properties /igid, transparent, excellent impact resistance, good weather resistance, good dimensional stability /igid, opa0ue, tough, good () resistance
Polycarbonate
PC
-crylate Styrene -crylonitrile
-S-
Styrene -crylonitrile
S-#
/igid, transparent, tough, resistant to stress cracking
Polyvinyl Chloride
P)C
Polyurethane
P(/
/igid or flexible grades, weatherprooof, non6flammable, good impact strength and electrical insulation 7lexible, clear, impermeable
Polyesters
Polysulphone
Polyphenylene Sulphide
Polyvinylidene 7luoride
P', P
/igid, clear, extremely tough, wide temperature range resistance PS,PS(,P8 xcellent high temperature stability, rigid or flexible grades available! High cost PPS /igid, opa0ue, non6burning, good chemical resistance at high temperature P)$7
Strong, tough material with excellent chemical and heat resistance
Low $ensity %Packaging, containers! High $ensity % crates, chemical drums, gas&water pipe and fittings, kitchenware GPPS % toys, packaging, cosmetic packaging H*PS % ) cabinets, refrigerator linings, toilet seats Lenses, signs, light diffusers, point of purchase displays $omestic appliances, car fascias, computer housings Gears, bearings, automotive under bonnet parts -erosol valves, clock parts, computer printer components Crash helmet visors, vandal proof gla4ing, riot shields, car headlamp lenses, safety helmets, babies5 bottles Housings, telephones, automotive door mirrors and radiator grilles Lenses, drinking tumblers, kitchen and picnic ware, hi6fi covers $rainpipes and guttering, cable insulation, flooring, roofing, hosepipes Shoe soles and heels, seals, gaskets, rollers, wheels $rink bottles, business machine components, transformer parts .icrowave grills, chemotherapy devices, surgical e0uipment, fuel cells Chemical pumps, medical and dental e0uipment, transformer parts, heating element bases )alves, pumps, bearings in chemical process industry 85
Polyphenylene 3xide thylene )inyl -cetate
PP3 )-
/igid, opa0ue, glossy, excellent dimensional stability 7lexible 1rubber6like2, good low temperature flexibility, good chemical resistance
) housings, automotive instrument enclosures Handle grips, ice cube trays, hoses
2. Mesin Ine%si &*asi%
Ga+-ar .2. Mesin Ine%si &*asi%
. Jenis 3ea%an &*asi% ( Plastic Molding )
86
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