一种用永久石墨铸型铸造类似条码扫描器感光板的ZA-12近网形零件的铸造工艺,由美国一石墨铸造公司研制出来。据说ZA-12锌铝合金比铝或青铜更坚硬、强度高又耐磨,机加工则像黄铜或青铜一样容易,比铸铁或铝更容易。用小角度移动(LTA)自动浇铸技术生产的铸件,尺寸稳定,孔隙少,一致 A casting process using a permanent graphite mold similar to a bar code scanner plate ZA-12 near the net-shaped parts, developed by the United States a graphite casting company. The ZA-12 zinc-aluminum alloy is said to be harder, stronger and wearable than aluminum or bronze, machined as easily as brass or bronze and easier than cast iron or aluminum. Castings made with Low Angle of Movement (LTA) automatic casting technology, with dimensional stability, low porosity and uniform