宜昌水泵厂铸造车间型砂配置一般在夜班进行,但夜班无压缩空气供给,故混砂机卸砂门只得靠手动操作。混砂机原卸砂门结构欠合理,造成漏砂和工作时砂门颤动。为此对卸砂门的开启机构进行改进,成为如图所示的四连杆机构,并利用其死点的作用,解决了存在的问题。现卸砂门使用灵活,操作省力,卸砂门开启的大小可方便地调节。 Yichang pump plant foundry sand configuration generally carried out at night shifts, but no supply of compressed air at night, so sand mixer unloading sand door had to rely on manual operation. Sand mixer original unloading sand door structure is not reasonable, resulting in sand leakage and sand door vibration. For this reason, the opening mechanism of the unloading sand door is improved to become a four-bar linkage mechanism as shown in the figure and the existing problems are solved by using the dead point. Now unloading sand door flexible, easy operation, the size of the opening of the unloading sand door can be easily adjusted.