13号车钩内腔结构复杂,难于机械加工,故要求铸件毛坯能达到互换和良好的三态作用,并便于组装和检修。由于钩体要能互换和影响三态作用的配合尺寸又集中于其内腔,所以对泥芯的尺寸精度要求很高。目前,在车钩型芯生产中均采用合脂砂或水玻璃砂,整个型芯分上下两爿,在震实式造型机上制芯,烘干后,拼芯组装使用。生产效率低,劳动强度大,且在制芯和拼芯过程中尺寸难以保证,精度和表面光洁度差。随着铁路运输的迅速发展,车辆生产批量日益增大,老的生产工艺在 13 coupler cavity structure is complex, difficult machining, casting castings required to achieve the exchange and good trigeminal effect, and ease of assembly and maintenance. As the hook to be interchangeable and affect the tri-state role with the size and focus on its lumen, so the mud core dimensional accuracy is very high. At present, in the production of the coupler core, both synthetic sand and sodium silicate sand are used. The whole core is divided into two parts. The core is manufactured on the shock modeling machine, and after drying, the assembly is used. Low production efficiency, labor-intensive, and in the process of core-making and spelling the size of the guarantee is difficult to guarantee the accuracy and surface finish is poor. With the rapid development of rail transport, the production volume of vehicles has been increasing day by day.