造(zao)(zao)型(xing)(xing)(xing)機(ji)(ji)最(zui)早出現于(yu)19世紀中期，早期的造(zao)(zao)型(xing)(xing)(xing)機(ji)(ji)是(shi)一種簡單的手動(dong)壓(ya)實帶起模的機(ji)(ji)構(gou)，后來采用壓(ya)縮(suo)空氣作(zuo)為震實和壓(ya)實型(xing)(xing)(xing)砂的動(dong)力。1890年出現了震擊式(shi)造(zao)(zao)型(xing)(xing)(xing)機(ji)(ji)，使(shi)造(zao)(zao)型(xing)(xing)(xing)效率和砂型(xing)(xing)(xing)精度(du)都有(you)了提高(gao)。造(zao)(zao)型(xing)(xing)(xing)機(ji)(ji)按其緊實型(xing)(xing)(xing)砂的方法不同(tong)...