一、前言当前,我国铸造生产中正在推广冷硬树脂砂制芯,(型)新工艺,其中可使时间和脱模时间是必须控制的重要工艺性能。可使时间的英文名词为bench Life或working time;内名称不统一,如可用期、使用寿命、有效期、可使用时间、工作时间等,本文定为可使时间,以t_k表示,即从络合反应开始的时刻到不断进行反应的树脂粘结力降到一定数值所经过的时间间隔。脱模时间,英文为striping time,stri- I. Preface At present, China’s casting production is being promoted chilled resin sand core, (type) new technology, which allows time and demoulding time is an important process must be controlled performance. Can make the time of the English term bench Life or working time; internal name is not uniform, such as the useful life, useful life, useful life, working hours, working hours, etc., this article can make the time to t_k that from the complex The time period elapsed between the start of the reaction and the time until the resin bond strength of the reaction drops to a certain value. Stripping time, English striping time, stri-