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无机粘结剂混制湿态砂在热芯盒成型工艺中的应用研究
Application of Wet Sand Mixed with Inorganic Binder in Hot Box Core-shooting Process
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- DOI:
- 作者:
- 程楠 陈群
CHENG Nan;CHEN Qun
- 作者单位:
- 郑州型砂工艺材料研究院有限公司 河南金耐源新材料科技有限公司
Zhengzhou Molding Sand Technology and Materials Research Institute Co.,Ltd.,Zhengzhou450000,China;HenanQuannaiyuan New Materials Technology Co.,Ltd.,zhengzhou450000,China
- 关键词:
- 无机粘结剂 热芯盒工艺 砂芯性能 旧砂再生
inorganic binder hot box process sand core performance
- 摘要:
- 采用无机粘结剂应用于热芯盒制型芯工艺中,研究结果表明,砂模型不仅具有较好的即时热态抗拉强度和常温抗拉强度,而且1 000℃残留强度为0.3 MPa,砂芯溃散性能好;砂芯的800℃发气量为3 mL/g,湿砂密封可使用时间超过24 h;浇注过程中,无有毒有害气体产生,有效改善工作环境;浇注所得铸件的尺寸精度、表面粗糙度均能满足工艺要求。The inorganic binder was applied to the hot core box core making process.The results show that the sand core not only has good immediate hot tensile strength and room temperature tensile strength,but also has a residual strength of 0.3 MPa at 1 000℃.The core has good collapsibility.The air generating capacity of sand core at 800℃is 3 mL/g,and the service time of wet sand seal can exceed 24 h.During pouring,no poisonous and harmful gases are produced,which can effectively improve the working environment.The dimensional accuracy and surface roughness of castings obtained by pouring can meet the technological requirements.