Transactions of Materials and Heat Treatment

Title：Design on hot pressing-injection molding integrated die for hemp fiberboard automobile parts

Authors： Wu Junjun1 Liu Saike2 Gao Yehan2 Huang Zhigao1

Unit： 1. School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430070 China 2. Ningbo Fangzheng Automotive Mold Co. Ltd. Ningbo 315600 China

KeyWords： automobile parts hot pressing-injection molding integrated process die design assembly clearance array-type distribution

ClassificationCode：TG76

year,vol(issue):pagenumber：2025,50(6):168-172

Abstract：

In order to solve the problem of product defects caused by the jamming of upper and lower dies in the hot pressing-injection molding integrated process, the root cause of the jamming of upper and lower dies was deeply analyzed, namely the improper setting of the clearance between upper and lower dies in the die design. Thus, an optimized hot pressing-injection molding integrated die of automobile parts was innovatively designed, and the firm combination of connector and drive component was ensured by using the array-type first countersunk hole and threaded connection with the cylinder drive end. At the same time, the introduction of the second countersunk hole design strengthened the connection strength between insert plate and connector, effectively preventing loosening and rotation when subjected to force, further improving the overall performance and reliability of the die. The results show that the die achieves accurate positioning and stable assembly of the drive parts by precisely arranging grooves on the bottom of lower die that precisely match the cylinder drive parts, significantly reducing the risk of interference during die installation and improving installation efficiency and stability of die operation, which not only significantly enhances the practical value of die and production efficiency, but also provides a more efficient and reliable die solution scheme for the manufacturing field of automobile parts.

Funds：

科技创新2025重大专项（宁波市重大科技任务攻关项目）（2022Z010）

作者简介：吴军军（1997-），男，博士研究生，E-mail：1713143303@qq.com；通信作者：黄志高（1976-），男，博士，教授，博士生导师，E-mail：huangzhigao@hust.edu.cn

Reference：

[1]杨乃臣，宋志磊. 一次成型模压纤维板生产工艺之探讨 [J]. 科技传播，2013，5 (14)：98-99.

Yang N C，Song Z L. Discussion on the production process of one time molding fiberboard[J]. Public Communication of Science & Technology，2013，5(14)：98-99.

[2]候典福. 谈一次成型模压纤维板生产工艺 [J]. 农村实用科技信息，2014（9）：62.

Hou D F. Talk about the production process of one time molding fiberboard [J]. Rural Practical Technology Information，2014（9）：62.

[3]陈生超. 长玻纤增强聚丙烯注塑成型中纤维断裂和分布的初步研究 [D]. 郑州：郑州大学， 2013.

Chen S C. Preliminary Study on the Fiber Breakage and Distribution of the Long Glass Fiber Reinforced Polypropylene Injection Molding[D]. Zhengzhou：Zhengzhou University， 2013.

[4]孙莹，梁松俭，唐小琦，等.基于嵌入式控制系统的模内层压成型研究与实现 [J]. 制造技术与机床，2013 (5)：35-39.

Sun Y，Liang S J，Tang X Q，et al. Research and realization of in-mould lamination based on embedded control system [J]. Manufacturing Technology & Machine Tool，2013 (5)：35-39.

[5]陈磊. 汽车内饰件模内层压成型技术研究[D]. 武汉：华中科技大学， 2009.

Chen L. Research on In-mold Injection Technique of Auto-inner Ornament[D]. Wuhan：Huazhong University of Science and Technology， 2009.

[6]胡敏，荆妙蕾，王春红，等.洋麻纤维性能分散性及其复合材料界面结合性能[J]. 塑料工业，2019， 47 (3)：79-82.

Hu M，Jing M L，Wang C H，et al. Dispersion of kenaf fiber performance and its interface bonding properties [J]. China Plastics Industry，2019， 47 (3)：79-82.

[7]黄志高，蔡考群，周华民，等. 塑料成型新工艺:模内层压[J]. 塑料工业，2008， 36 (6)：72-74.

Huang Z G，Cai K Q，Zhou H M，et al. New plastic molding process: In-mold lamination[J]. China Plastics Industry，2008， 36 (6):72-74.

[8]孙锐，袁学虎，周天平，等. 轻质GMT板材在商用车内饰顶棚的开发中的应用及与麻纤维板制品的对比[J]. 汽车零部件，2014 (4)：44-47.

Sun R，Yuan X H，Zhou T P，et al. Applications of low density glass mat thermoplastics in ceiling development of commercial vehicle and compare with bast-fibre panel [J]. Automobile Parts，2014(4)：44-47.

[9]万志远.轿车后地板成形工艺及修边冲孔模具设计[J].锻压技术，2024，49(2):71-76.

Wan Z Y. Forming process and trimming-punching die design of car rear floor[J]. Forging & Stamping Technology，2024，49(2)：71-76.

[10]万志远.轿车前围挡板成形工艺分析及模具设计[J].锻压技术，2024，49(4):76-81.

Wan Z Y. Forming process analysis and die design on car front wall panel [J]. Forging & Stamping Technology，2024，49(4)：76-81.

[11]路全胜，于同敏，徐文波. 注塑工艺条件与塑件质量分析[J]. 模具工业，1992 (6)：26-31.

Lu Q S， Yu T M，Xu W B. Analysis of injection molding process conditions and plastic part quality [J]. Die & Mould Industry，1992 (6):26-31.

[12]李坤全，文睿. 汽车内饰注塑工艺优化、数值模拟及缺陷分析[J].工程塑料应用，2017， 45 (8):139-142.

Li K Q， Wen R. Injection molding process optimization，numerical simulation and defect analysis of automotive interior[J].Engineering Plastics Application，2017， 45 (8):139-142.

[13]罗纲. 注塑模成型常见缺陷及解决方法[J]. 成都纺织高等专科学校学报，2008 (1):28-30.

Luo G. Defects and solutions for injection mold formation [J]. Journal of Chengdu Textile College，2008(1):28-30.

[14]冼嘉其. 一种刷毛模具合模装置启闭模速度的测量方法 [P]. 中国：CN109278266A，2019-01-29.

Xian J Q. A measuring method for the opening and closing speed of the mould closing device of a bristle mould [P].China：CN109278266A，2019-01-29.

[15]孙为朋，孙明东，陈伟华，等. 基于Autoform Sigma的汽车门内板生产稳定性与材料性能的关系[J]. 锻压技术，2023，48（2）：85-93.

Sun W P，Sun M D，Chen W H，et al. Relationship between production stability and material properties on automobile door inner panel based on Autoform Sigma [J]. Forging & Stamping Technology，2023，48（2）：85-93.

[16]赵德勋，李斌. 一种注塑模具防卡死结构 [P].中国：CN219405229U，2023-07-25.

Zhao D X，Li B. An anti-jamming structure for injection molds [P]. China：CN219405229U，2023-07-25.

Service：

【This site has not yet opened Download Service】【Add Favorite】