中文摘要：

砂模打印是一种基于增材制造的新型无木模砂模造型技术，保障成型砂模的尺寸精度是其核心问题之一。归纳砂模打印成型机理及其误差来源，分析液态粘结剂由喷头喷射至原砂成型面的液滴飞行过程，建立起液滴飞行时间的数学模型以及误差计算模型，用于打印过程中的偏差补偿量确定，以减少或消除误差，提高成型砂模的精度和质量。

英文摘要：

The sand mold printing is a novel sand casting technology without wood molds and the accuracy control of sand molds is one of the key problems for the sand mold printing. The saint mold printing principle is summarized and the error sources are analyzed. The process of the hinder droplets flying from the nozzle to the molding surface is investigated and the mathematic models are built for the droplet flight time span and the errors that determines the error compensation data to improve accuracy and quality of formed sand molds.