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在做泥心的时候,为了使泥心有足够的强度,一般都要安放泥心骨。良好的泥心骨应該具备以下条件: 1.有足够的强度和剛性; 2.不妨碍鑄件自由收縮; 3.不妨碍砂型或泥心的通气性; 4.出砂时容易清理; 5.結構尽可能的簡單,制造容易; 6.尽可能的节省金屬; 7.大批或成批生产时,最好选用能多次使用的心骨。不过,很难要求心骨全面的具备以上条件,在不同的情况下,某些条件就有着它更重要的意义和作用。
In making the mud heart, in order to make the mud heart has sufficient strength, generally have to put mud heart. Good mud heart should have the following conditions: 1. Adequate strength and rigidity; 2. Does not prevent the free contraction of castings; 3. Does not prevent the sand or mud heart ventilation; 4. Easy to clean sand; Structure as simple as possible, easy to manufacture; 6. As much as possible to save the metal; 7. Mass or batch production, the best use of the heart can be used repeatedly. However, it is very difficult to claim that the above conditions should be fully met in the heart, and under different circumstances certain conditions have their more important significance and effect.