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第二汽车制造厂通用铸锻厂使用S116等型号的混砂机。刮板由于与型砂接触磨损很快,而且又不容易拆卸更换,使维修较困难。原结构(以内平刮板为例)如图1所示,刮板3与刮板条1用沉头螺钉2连接起来,因与砂子接触磨损,常把沉头螺钉的沉头凹槽磨损掉。一旦更换刮板时,很难将沉头螺钉拧拆下来,只好用气割或用手电钻去除。这样,除了把磨损的刮板换掉外,还把可以继续使用的刮板条也一起报废,造成很大浪费。
Second Automobile Factory GM Casting and Forging Plant S116 and other types of sand mixer. Scraper wear and tear due to contact with the sand quickly, but not easy to remove the replacement, making maintenance more difficult. As shown in Figure 1, the scraper 3 is connected with the scraper strip 1 by the countersunk head screw 2. The worn groove of the countersunk screw often wear out because of contact with the sand . Once the scraper is replaced, it is difficult to unscrew the grub screw and cut it with a gas cutter or a hand drill. In this way, in addition to the worn scraper replaced, but also can continue to use scraper strip together scrapped, resulting in a great waste.