The present invention is a kind of sand-shooting nozzle which is not easy to stick sand and block. On the core-making machine using hot-core box to make core and shell, such as the turbine supercharger intermediate of Shanghai Lingzhong Company, the sand-shooting nozzle of the hot-core box is a flat sand-shooting nozzle located on the parting surface of the hot-core box. Although the length is large, the distance between the two sides is relatively close, the heat concentration, the surface temperature of the sand-shooting nozzle is higher than that of other parts, and it is very easy to adhere residual sand. When solidified by heat, it is easy to block the nozzle partially or totally, which affects the uniformity and filling integrity of sand mould in the cavity. It is found that the nozzle is changed from flat to conical nozzle cup connected with cylindrical nozzle. On the one hand, the surface distance increases, on the other hand, the scouring effect is formed in the conical cup when sand is injected, which solves the problem of sand sticking and blocking at the nozzle. \u3002
【技术实现步骤摘要】
一种不易粘砂和堵住的射砂口
铸造工业制芯模具，特别是一种热芯盒模具的射砂口结构。
技术介绍
公司承接的上海菱重公司涡轮增压器重要配件中间体铸件，是采用覆膜砂制壳制芯，如M49173-20656型中间体，其制芯的热芯盒射砂口都是设计成和芯盒分型面平行的扁射口，但在使用过程中，扁状射口虽然在长度上能将覆膜砂分散开，而两个侧面由于距离较近，热量集中，表面温度高于其他部位，残砂易附在上面受热固化不易脱落，时间一长残砂粘附越多，就会将扁状射砂口堵住或部分堵住，造成型腔不能完全射砂充型，或型中覆膜砂紧实度不一致，在浇注铁水时因砂型强度不均匀造成走漏铁水。
技术实现思路
本专利技术的目的是解决热芯盒射砂口的易粘砂堵塞，通过一系列的试验将热芯盒射砂口形状由扁状改成顶端为圆锥形的圆柱状射砂口。本专利技术的技术方案是一种不易粘砂和堵住的射砂口，在热芯盒的射砂口位置，热芯盒上端的射砂口成上大下小的圆锥形射口杯，射口杯下端连接圆柱形射砂管，射砂管下端连接热芯盒的型腔。本专利技术的显著效果是射砂口改圆柱形后热芯盒的热量易于散发，射口顶端为倒圆锥形，射砂时砂粒对射口有冲刷作用，使射口不易粘住砂粒，防止射口发生堵塞现象。附图说明图1.热芯盒射砂口结构剖视图1、热芯盒2、射口杯3、射砂管4、型腔具体实施方式一种不易粘砂和堵住的射砂口在热芯盒1的射砂口位置，热芯盒1上端的射砂口成上大下小的圆锥形射口杯2，射口杯2下端连接圆柱形射砂管3，射砂管3下端连接热芯盒1的型腔4。
【技术保护点】
1.一种不易粘砂和堵住的射砂口，其特征是：在热芯盒的射砂口位置，热芯盒上端的射砂口成上大下小的圆锥形射口杯，射口杯下端连接圆柱形射砂管，射砂管下端连接热芯盒的型腔。
【技术特征摘要】
1.一种不易粘砂和堵住的射砂口，其特征是：在热芯盒的射砂口位置，热芯盒上端的射砂口...
【专利技术属性】
技术研发人员：郑涛，
申请(专利权)人：科华控股股份有限公司，
类型：发明
国别省市：江苏,32
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