盖板模具在开始生产作业时，间隔一定时间或生产一定数量的制件后，应对制件进行抽样检查，即进行检查。
At the beginning of the production operation of the cover plate mould, the sampling inspection shall be carried out for the parts at a certain interval or after a certain number of parts are produced.

中间检查的目的是了解盖板模具在使用时的磨损速度，评估磨损速度对模具精度和制件质量的影响情况，以预防不合格品的成批出现。
The purpose of the intermediate inspection is to understand the wear rate of the cover die in use, and to evaluate the impact of the wear rate on the die accuracy and product quality, so as to prevent the batch appearance of unqualified products.

生产作业终了时，应对最终制造的制件新型检查，同时结合对模具的外观检查，来判断盖板模具的磨损程度和有无修理或重磨的必要。
At the end of production, the new type inspection of the final manufactured parts shall be conducted, and the appearance inspection of the die shall be combined to determine the wear degree of the cover die and whether it is necessary to repair or regrind.

此外，通过对首件检查和末件检查的结果进行比较，能够测算模具的磨损速度，以便合理安排下一次作业的制件生产批量，避免模具在下次使用时因中途需要重磨或修理而中断作业所造成的损失。
In addition, by comparing the results of the first piece inspection and the last piece inspection, the wear rate of the die can be calculated, so as to reasonably arrange the production batch of the next operation, and avoid the loss caused by the interruption of the operation due to the need for regrinding or repair during the next use of the die.