车钩是我厂大量生产的铸钢件之一,该件型腔结构复杂,精度要求高,为保证产品精度及便于清砂,采用合脂芯砂制芯,并在钩头部位组装上四只小坭芯。小坭芯预先做好、烘干后,再用铁丝栓在湿态的主体坭芯上,等全部装配好后,进炉干燥。在组装小坭芯时,为了使坭芯固定牢固,将铁丝栓在主体芯骨上, 通过小坭芯中心孔将坭芯扎紧, 再用涂料嵌抹好。采用这种组装方法,如操作水平和熟练程度不高,容易 The coupler is one of the steel castings mass-produced in our factory. The structure of the cavity is complex and requires high precision. In order to ensure product accuracy and easy sand-cleaning, Only a small stupid core. Small Kao core pre-done, after drying, and then use the wire in the main body of the wet tuck core, and so all assembled, into the furnace drying. In the assembly of the small core, in order to make the core fixed firmly, the wire in the main body of the bones, through the center of the small core of the core of the core tight tie, and then paint a good wipe. Using this method of assembly, such as the level of operation and proficiency is not high, easy