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Application filed by Akrr Sdn BhdfiledCriticalAkrr Sdn Bhd
Priority to MYPI99000197ApriorityCriticalpatent/MY125172A/en
Publication of MY125172ApublicationCriticalpatent/MY125172A/en
A SPROCKET WHEEL FOR A MOTORCYCLE IS MANUFACTURED BY PRESSURE DIE CASTING FROM AN ALUMINIUM/SILICON/COPPER ALLOY OF COMPOSITION:-SI 9.6 TO 12.0% CU 1.5 TO 4.54 % PREFERABLY 1.5 TO 3.5% ZN UP TO 1.0% FE UP TO 0.9% MN UP TO 0.5% NI UP TO 0.5% MG UP TO 0.3% SN UP TO 0.3% WITH THE BALANCE, APART FROM INCIDENTAL IMPURITIES, BEING ALUMINIUM, ALL PERCENTAGES BEING BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE COMPOSITION, BY CASTING THE ALLOY AT A TEMPERATURE OF AT LEAST 600?C UNDER A PRESSURE OF FROM 500 TO 800 KG/CM? AND WITH A CYCLE TIME OF 20 TO 40 SECONDS, UNDER CONDITIONS SUCH THAT THE MAXIMUM POROSITY OF THE CASTING IS 0.15ML/100G.