1U型平衡装置，避免因物料放置不当而发生意外。2投料口采用上下移动式开门，减少开门空间，方便投料。3安全连锁，自带翻包系统。 1. U-balance device to avoid placing inappropriate material accidents2. The feed opening used up-down move door in order to save some place convenient feed the material,3. Safety chain lock, bringing over packet system.