METAL CASTING ENGINEERING ELEMENTARY COMPETENCY 1 UNSTRESSED CASTING METAL CASTING ENGINEERING CLASS XII/ SEMESTER 5 ELEMENTARY COMPETENCY 1

Coating Propertys Heatresistant to receive casting temperature Pelapis after drought must be strong, doesn't destroy because liquid metal Thick pelapis which is enough to can prevent metal penetration Gas generated a few Teknologi dan Rekayasa

Purpose of Coating Prevents fusion and penetration of liquid metal Gets equiamplitude surface of coran which is smooth Throws away core sand and molding sand easily when disassembly Negates defect by pasir(sirip) Teknologi dan Rekayasa

Mold Paint And Varnish For Green sand Grafit Talek yang murni Bubuk mika Teknologi dan Rekayasa

Way Of Coating Mold For Green sand With broadcasting : powder packed into cotton cloth pocket, spread at equiamplitude surface of vertical mold midwife With painting : powder at the end of paintbrush painted at vertical equiamplitude surface from the top (of) downwards Powder tends to heaps in chamber basis, hence having to be blown [by] exit Teknologi dan Rekayasa

Mold Coating For Dry Sand Powder grafit/arang, if(when pouring temperature under 1350o Composition a. Plumbago mixture 100(grafit cake 0-40%, soil;land;ground plumbago 60-100%); Bentonite 10-20% or fire proof Clay 20-40% b. Mixture grafit(grafit cake 20-50%, soil;land;ground plumbago 50-80%), Bentonite 10-20% or fire proof Clay 20-40% If using fire proof Clay, mingled sugar drip 2-5% Teknologi dan Rekayasa

Mold Coating For Dry Sand Sheating for temperature to 1350o C Composition : Plumbago mixture 100(grafit cake 80-90%, coke black coal 20%); Bentonite 10-20% Cake plumbago 100, Amonium khlorida 0,5%; Bentonite 10-20% It is material experiencing a few denaturings at high temperature Teknologi dan Rekayasa

Coating Mold of Dry Sand Process Investigates concentration of pelapis before bedding Bedding of mold is done [by] before drainage for mold dried once, and after first drainage if dried [by] 2 times Bedding is done with spraying /pengecatan Bedding at vertical equiamplitude surface is done with sweeping from under upward Teknologi dan Rekayasa

Dry Sand and Greensand Dry sand that is clay soil sand type where after formed to to become mold must be dried beforehand. This very compatible sand applied for casting of bendabenda which big and also is small Teknologi dan Rekayasa

This sand only applied for casting of small substances Green sand is clay soil sand type which has been formed to become mold is not necessarily be done drainage This sand only applied for casting of small substances Teknologi dan Rekayasa

THANK YOU CREATED BY : HERU KARYANA, SPd SMKN 2 KLATEN Teknologi dan Rekayasa