daftar isi

DAFTAR ISI

KATA PENGANTAR...........................................................................i

DAFTAR ISI..........................................................................................ii

DAFTAR TABEL..................................................................................vi

DAFTAR GAMBAR.............................................................................vii

BAB I PENDAHULUAN

1.1. Latar Belakang...........................................................................1

1.2. Tujuan........................................................................................2

1.3. Batasan Masalah.........................................................................2

1.4. Tempat Praktikum .....................................................................2

1.5. Sistematika Penulisan................................................................3

BAB II PEMBUATAN RANGKA CETAK DAN INTI

2.1 Tujuan................................................................................................4

2.2 Teori Dasar........................................................................................4

2.3 Tata Cara Praktikum`

2.3.1 Skema Proses........................................................................14

2.3.2 Penjelasan Skema Proses......................................................15

2.4 Alat dan Bahan

2.4.1 Alat.......................................................................................15

2.4.2 Bahan....................................................................................15

2.5 Pengumpulan Dan Pengolahan Data

2.5.1 Pengumpulan Data...............................................................16

2.5.2 Pengolahan Data...................................................................17

2.6 Analisa dan Pembahasan...................................................................17

2.7 Kesimpulan’dan Saran

2.7.1 Kesimpulan...........................................................................18

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2.7.2 Saran.....................................................................................19

BAB III PENGUJIAN PASIR CETAK

3.1 Tujuan..............................................................................................20

3.2 Teori Dasar.......................................................................................20

3.3 Tata Cara Praktikum

3.3.1 Skema Proses........................................................................30


3.4 Alat dan Bahan

3.4.1 Alat.......................................................................................31

3.4.2 Bahan....................................................................................31



3.5.2 Pengolahan Data...................................................................36

3.6 Analisa dan Pembahasan..................................................................38

3.7 Kesimpulan dan Saran

3.7.1 Kesimpulan......................................................................40

3.7.2 Saran................................................................................40

BAB IV PELEBURAN DAN PENUANGAN LOGAM

4.1 Tujuan................................................................................................41

4.2 Teori Dasar........................................................................................41


4.3.1 Skema Proses........................................................................53


4.4 Alat dan Bahan

4.4.1 Alat.......................................................................................55

4.4.2 Bahan....................................................................................55



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4.5.2 Pengolahan Data...................................................................56

4.6 Analisa dan Pembahasan...................................................................56


4.7.1 Kesimpulan...........................................................................58

4.7.2 Saran.....................................................................................58

BAB V ANALISA CACAT CORAN

5.1 Tujuan..............................................................................................59

5.2 Teori Dasar.......................................................................................59


5.3.1 Skema Proses........................................................................71


5.4 Alat dan Bahan

5.4.1 Alat.......................................................................................72

5.4.2 Bahan....................................................................................72



5.6 Analisa dan Pembahasan..................................................................73


5.7.1 Kesimpulan...........................................................................77

5.7.2 Saran.....................................................................................77

DAFTAR PUSTAKA............................................................................78

LAMPIRAN...........................................................................................79

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DAFTAR TABEL

Tabel 2.1 Komposisi Bahan Cetakan Pasir ............................................16

Tabel 3.2 Pengujian Kadar Air ...............................................................34

Tabel 3.3 Pengujian Kadar Lempung .....................................................34

Tabel 3.3 Pengujian Kadar Lempung .....................................................34

Tabel 3.4 Pengujian Kekuatan Tekan ....................................................34

Tabel 3.5 Pengujian Kekuatan Geser .....................................................37

Tabel 3.6 Pengujian Distribusi Besar Butir ............................................37

Tabel 3.7 Pengujian Besar Buitir dengan bilangan pengali ...................36

Tabel 4.1 Data pengamatan awal ...........................................................57

Tabel 5.1 Cacat lubang-lubang penyebab dan pencegahan ....................62

Tabel 5.2 Bentuk, penyebab dan pencegahan cacat permukaan kasar ...65

Tabel 5,3 Penyebab & pencegahan cacat iklusi,struktur uniform...........68

Tabel 5.4 Bentuk, penyebab dan pencegahan cacat deformasi ..............69

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DAFTAR GAMBARGambar 2.1 Saluran Tuang......................................................................4

Gambar 2.2 Tahapan Pengecoran dengan cetakan pasir.........................6

Gambar 2.3 Cetakan sekali pakai............................................................6

Gambar 2.4 Match-piate pattern.............................................................10

Gambar 2.5 Pembuatan inti.....................................................................11

Gambar 2.6 Operasi Pengecoran cetakan pasir.......................................11

Gambar 2.7 Skema Proses ......................................................................14

Gambar 2.8 Proses pembuatan cetakan...................................................16

Gambar 3.1.Alat uji kehalusan pasir cetak .............................................24

Gambar 3.2 Alat pengujian kekuatan pasir ............................................25

Gambar 3.3 penempatan spesimen pada mesin pengujian kekuatan ......26

Gambar 3.4 mesin mixer ........................................................................29

Gambar 3.5 Skema Proses Pengujian Pasir ............................................30

Gambar 3.6 kurva pengujian kekuatan tarik geser .................................36

Gambar 3.7 Spesimen ø50x50mm 3x, 5x,7x ........................................37

Gambar 3.8 Pemasangan Spesimen 7x, pemadatan ...............................37

Gambar 3.9 Identor uji keras dan tekan .................................................37

Gambar 4.1 Serbuk alumunium .............................................................42

Gambar 4.2 Spesifikasi Tungku Krusibel ..............................................51

Gambar 4.3 Tungku Induksi ...................................................................52

Gambar 4.4 Tungku Busur Listrik..........................................................52

Gambar 4.5 Skema proses penuangan dan peleburan logam..................53

Gambar 5.1 Cacat ekor tikus dan kekasaran meluas ..............................61

Gambar 5.2 Cacat retakan ......................................................................64

Gambar 5.3 Cacat salah alir ...................................................................66

Gambar 5.4 Cacat struktur butir terbuka ................................................70

Gambar 5.5 Skema proses ......................................................................71

Gambar 5.6 Produk Coran Connecting Rod ...........................................72

Gambar 5.8 Cacat Pergeseran ................................................................73

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Gambar 5.6 Cacat porosity .....................................................................73

Gambar 5.8 Cacat inklusi pasir ..............................................................74

Gambar 5.9 Cacat Penyusutan Luar .......................................................75

Gambar 5.8 Cacat Cacat erosi pasir .......................................................76

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