一、带式给料机定量精度分析在型砂制备过程中,旧砂的准确定量是获得高质量型砂的重要环节。目前为中高压自动造型线配套的混砂系统,旧砂定量大多用带式给料机加料并用电子秤或杠杆秤定量。有的工厂认为:电子秤和杠杆秤虽然定量精度较高,对型砂质量有保证,但在砂处理工部灰尘较多、湿度较高、振动较大的场合下,其故障较多并对维修保养技术要求较高。特别是一些在老厂房基础上进行技术改造的单位,由于受到 First, the tape feeder quantitative accuracy analysis In the preparation of sand, the exact amount of old sand is an important part of access to high-quality sand. At present for the high-pressure automatic molding line matching sand system, most of the old sand with a tape feeder quantitative and electronic scales or leverage scale quantitative. Some factories believe that although electronic scales and lever scales have high quantitative accuracy and guaranteed quality of molding sand, there are more troubles in the occasions when dust is more, humidity is higher and vibration is greater in the sand processing department, Maintenance of technical requirements. In particular, some of the units based on the transformation of old factories, due to