u型槽模具优点和积极效果1．本发明以煤为燃料，节约了能源。  2．由于采用纯净恒温热风对物料进行煅烧，保证了物料的清洁性。  3．滚筒的直径大小可根据物料产量进行调节，对产量的供给有了一定的保证。  4．预热和煅烧效果好。  5．物料经冷却滚筒冷却后，可直接打包，避免了繁复的翻凉工作。  6．可保证彩砂颜色均匀、长时间不掉色。  7．本工艺方法可配有上煤机、自动除渣机及除尘设备，既节省了人力，又可达到环保的要求。  特点：   1、各种规格粒径均匀，颗粒浑圆，可任意级配。  2、颜色丰富多彩、持久靓丽、环保。永不变色  3、与各种树脂兼溶性好。  4、耐酸性  5、耐碱性  6、耐化学溶剂性  7、耐热水性高温400度不变色
U-shaped mold has advantages and positive effects 1. the invention uses coal as fuel and saves energy. 2. the purity and constant temperature and hot air are used to calcinate the materials to ensure the cleanliness of the materials. The diameter of the 3. roller can be adjusted according to the output of the material, which ensures the supply of the output. 4. the effect of preheating and calcining is good. 5. after cooling the cooling cylinder, the material can be directly packaged to avoid complex cooling. 6. ensure that the color of the color sand is uniform and not fade for a long time. 7. this process can be equipped with coal feeder, automatic slag remover and dust removal equipment, which saves manpower and environmental protection requirements. Features: 1. All sizes are uniform and round, and can be graded arbitrarily. 2, colorful, lasting and beautiful, environmental protection. Never discoloration 3, with a variety of resin and good solubility. 4, acid resistance 5, alkali resistance 6, chemical solvent resistance 7, hot water resistance and high temperature 400 degrees.