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注塑机后模板铸造工艺设计
Casting Process Design of Rear Template of Injection Molding Machine
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- DOI:
- 作者:
- 耿笑笑 张巨成 王浩
GENG Xiaoxiao;ZHANG Jucheng;WANG Hao
- 作者单位:
- 北京科技大学材料科学与工程学院 北华航天工业学院材料工程学院 常州凯达重工科技有限公司
School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing100083,China;School of Materials Engineering,North China Institute of Aerospace Engineering,Langfang065000,Chin;ChangzhouKaida Heavy Industry Technology Co.,Ltd.,Changzhou213151,China
- 关键词:
- 后模板 球墨铸铁 工艺设计
rear template ductile iron process design
- 摘要:
- 针对后模板大型球铁件的铸件高大,侧凹凸起多等特点,采用三箱造型,取模方便且便于型芯安放。采用底注开放式浇注系统,温度均衡,利于实现同时凝固。针对铸件壁厚不均匀,热节多等问题,采用高强度树脂砂型,利用石墨化膨胀消除缩松、缩孔缺陷。对顶部厚大面采用直接实用冒口进行液态补缩,消除缩孔与表面塌陷。铸件空腔采用整体芯形成,组合芯造型,定位准确,并进行工装设计。结果表明,该工艺设计提高了铸件的生产效率和质量,节约了生产成本。In view of the characteristics of large ductile iron castings with rear formwork,such as tall castings and more side concave and protruding,three boxes of modeling were adopted,which was convenient for mould extraction and convenient for core placement.The open pouring system with bottom gating system was adopted,and the temperature was balanced,which was beneficial to realize simultaneous solidification.In order to solve the problems of uneven wall thickness and many hot joints of castings,high strength resin sand mold was adopted to eliminate shrinkage porosity and pore shrinkage defects by graphitization expansion.The molting filling of the thick top surface was carried out by using a direct practical riser to eliminate the shrinkage hole and surface collapse.Casting cavity was formed by integral core,combined core modeling,accurate positioning,and tooling design.The results show that the process design improves the production efficiency and quality of castings and saves the production cost.