某铅锌小选矿厂,有1台250mm×400mm的颚式破碎机,不好操作,破碎效率低。固定齿板几天就需更换,配件消耗大,后来在生产过程中,发现固定齿板用过几天后齿板被磨损,有兜矿砂的现象,影响破碎效率,严重的是因矿砂堆积多,未及时处理,容易造成主轴折断而被迫停产。为了保证设备运转正常,决定在承置固定齿板的机座上焊垫一 A small lead-zinc concentrator, a 250mm × 400mm jaw crusher, poor operation, crushing efficiency is low. Fixed tooth plate a few days to be replaced, expensive accessories, and later in the production process, found that a fixed tooth plate used a few days after the tooth plate is worn, there is pocket ore phenomenon, affecting the crushing efficiency, serious is the accumulation of ore , Not handled in time, easily lead to spindle fracture and forced to stop production. In order to ensure the normal operation of the equipment, it is decided to place a pad on the base of the fixed toothed plate