Glass device for changing apparent density in metal casting

A casting system includes a casting for an automobile, the casting having an interior section. The plurality of central portions are each positioned in one of a plurality of regions of an inner section that is fully wrapped by the metal of the casting. An insert member is positioned in each of the plurality of center portions, the insert member having a melting point higher than a melting point of a metal of the casting replaced by the insert member. 一种铸造系统包含用于汽车的铸件，所述铸件具有内部区段。多个中心部分被各自定位在内部区段的多个区域中的一个中，所述内部区段被铸件的金属完全包裹。插入构件被定位在多个中心部分中的各个中心部分中，所述插入构件的熔点高于插入构件置换的铸件的金属的熔点。