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PROSES MANUFAKTUR

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Sand Casting• Die Casting• Shell Molding• Injection Molding

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Forging• Extrsion• Rolling• Coining• Dra!ing

•  Trning• Drilling• Milling•

Fla"e Ctting• Rea"ing• #rinding

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CASTIN# POCESSES

• Casting &rodcts

Metal

a( Dis)*+ra)e

,( Trans"ission -osing

Plastic

c( Digital Ca"era

d( Polaroid Ca"era Case

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META0 CASTIN# POCESSES

Ilstrasi sand "old

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* Co"&lex internal ca%ities* Medi" 1antities o2 o,jects !ith co"&lex external &

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Sand Casting

Production Steps

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1.1 Sand

Silica sand (SiO2 ): Ine!pensi"e

#ig$ te%peratures resisteance

Fa)tor*2a)tor &enting &e"ilihan sand %old:

Sand $a"ing &ne round grains ' or%s a s%oot$ surace

Good per%eailit* ' gases and stea% escape easil* 

Good collapsiilit* ' allo+ to s$rin, +$ile cooling

 Additi"es:

Cla*: co$esi"e agent to ond sand particles

-ircon (-rSiO )/ Oli"ine (0g2SiO )/ Iron silicate (e2SiO ) sands: lo+ t$

C$ro%ite (eCr 2O ): $ig$ $eattranser 

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1.2 Pattern

Onepiece patterns : si%pler s$apes and lo+uantit* production

Split Patterns : co%plicated s$ape

  C$aracteristics o Pattern 0aterials

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+e,era&a As&e) Pe",atan Pattern

0etal S$rin,age

0etal 3o+ Pele&asan 4re%o"al(

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1.4 Cores

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1. Sand0olding 0ac$ines

eli%inate arduous laor 

$ig$ualit* casting increases production rate

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1. SandCasting Operation

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Ad%antages and 0i"itations

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Characteristics o2 Casting Processes

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Surace 5oug$ness