采用地坑造型可以节约铸造砂箱用的金属消耗,尤其是对于产量较少的大型铸件用地坑造型更为适宜.对地坑型干燥的方法大多是采用移动式烘炉,用这种炉子轻巧方便,操作简单,经久耐用,成本低廉,更主要的是能保证质量,消除了用框形炉干燥时产生的砂型不干和烤坏等毛病.炉子的结构如图1,炉壳用7公厘的铜板焊成,炉内用耐 The use of pit shape can save the casting sand box with the metal consumption, especially for large-scale production of castings with pit modeling is more suitable for pit-type drying methods are mostly mobile oven, with this stove light Convenient, easy to operate, durable, low cost, more importantly, can guarantee the quality, eliminating the box-shaped furnace drying dry and roasted bad and other defects caused by the structure of the stove as shown in Figure 1, PCT copper welded into the furnace with resistance