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长玻纤增强聚丙烯流体辅助注塑管件的工艺影响

王佳敏 匡唐清 柳和生 朱瑶瑶 高聪

王佳敏, 匡唐清, 柳和生, 等. 长玻纤增强聚丙烯流体辅助注塑管件的工艺影响[J]. 复合材料学报, 2024, 41(5): 2436-2444. doi: 10.13801/j.cnki.fhclxb.20230906.001
引用本文: 王佳敏, 匡唐清, 柳和生, 等. 长玻纤增强聚丙烯流体辅助注塑管件的工艺影响[J]. 复合材料学报, 2024, 41(5): 2436-2444. doi: 10.13801/j.cnki.fhclxb.20230906.001
WANG Jiamin, KUANG Tangqing, LIU Hesheng, et al. Process effects of long glass fiber reinforced polypropylene fluid assisted injection molding pipes[J]. Acta Materiae Compositae Sinica, 2024, 41(5): 2436-2444. doi: 10.13801/j.cnki.fhclxb.20230906.001
Citation: WANG Jiamin, KUANG Tangqing, LIU Hesheng, et al. Process effects of long glass fiber reinforced polypropylene fluid assisted injection molding pipes[J]. Acta Materiae Compositae Sinica, 2024, 41(5): 2436-2444. doi: 10.13801/j.cnki.fhclxb.20230906.001

长玻纤增强聚丙烯流体辅助注塑管件的工艺影响

doi: 10.13801/j.cnki.fhclxb.20230906.001
基金项目: 国家自然科学基金 (52163006;52273033);江西省重点研发计划 (20223BBE51012);江西省自然科学基金重点项目(20232ACB204004)
详细信息
    通讯作者:

    匡唐清,博士,教授,硕士生导师,研究方向为聚合物成型工艺 E-mail: tkuang@ecjtu.edu.cn

  • 中图分类号: TQ320.66;TB332

Process effects of long glass fiber reinforced polypropylene fluid assisted injection molding pipes

Funds: National Natural Science Foundation of China (52163006; 52273033); The Key R&D Program of Jiangxi Province (20223BBE51012); Jiangxi Provincial Natural Science Foundation Key Program (20232ACB204004)
  • 摘要: 采用气体辅助注塑工艺(GAIM)、气体驱动弹头辅助注塑工艺(G-PAIM)、水辅助注塑工艺(WAIM)和水驱动弹头辅助注塑工艺(W-PAIM)这4种工艺方法成型长玻纤增强聚丙烯(LGFR-PP)流体辅助注塑管件,对比研究各工艺方法对管件壁厚、玻纤断裂长度及玻纤取向的影响。结果表明:W-PAIM工艺管件壁厚最薄且壁厚均匀性最好,GAIM工艺管件壁厚最厚且壁厚均匀性最差;G-PAIM比WAIM管件壁厚均匀性更好,但WAIM管件壁厚更薄;4种工艺方法中玻纤断裂长度呈不均匀分布,平均玻纤断裂长度WAIM>GAIM>W-PAIM>G-PAIM,弹头的引入使玻纤断裂作用加剧,玻纤断裂长度更短;G-PAIM、WAIM和W-PAIM工艺中玻纤沿流动方向取向度由近模壁层到中间层再到近流道层呈现逐渐升高的趋势,GAIM玻纤取向杂乱无章;各工艺管件玻纤取向程度W-PAIM>WAIM>G-PAIM>GAIM。

     

  • 图  1  弹头结构示意图:(a)尺寸图;(b)实物图

    $\phi $—Diameter

    Figure  1.  Schematic diagram of the projectile structure: (a) Dimensional drawing; (b) Physical picture

    图  2  管件壁厚测量:(a)管件测量位置(P1~P4);(b)截面测量点(T1~T4)

    Figure  2.  Wall thickness measurement of pipes: (a) Measurement position of pipes (P1-P4); (b) Measuring points of each section (T1-T4)

    图  3  SEM 观测样品制备

    Figure  3.  Preparation of SEM observation samples

    图  4  SEM观测样品

    Figure  4.  SEM observation samples

    图  5  光学显微镜下的玻纤断裂长度

    Figure  5.  Fracture length of glass fiber under optical microscope

    图  6  4种工艺成型的管件不同位置的壁厚

    GAIM—Gas-assisted injection molding process; G-PAIM—Gas-projectile-assisted injection molding process; WAIM—Water-assisted injection molding process; W-PAIM—Water-projectile-assisted injection molding process

    Figure  6.  Wall thickness at different positions of pipes molded by four processes

    图  7  4种工艺的壁厚标准偏差

    Figure  7.  Standard deviation of wall thickness by four processes

    图  8  4种工艺方法的玻纤断裂长度分布

    Figure  8.  Glass fiber breakage length distribution for four process methods

    图  9  4种工艺方法的平均玻纤断裂长度

    Figure  9.  Average glass fiber breakage length of four process methods

    图  10  4种工艺管件的SEM图像:(a) GAIM;(b) G-PAIM;(c) WAIM;(d) W-PAIM

    Figure  10.  SEM images of pipes molded by the four processes: (a) GAIM; (b) G-PAIM; (c) WAIM; (d) W-PAIM

    图  11  流体驱动弹头辅助注塑工艺(F-PAIM)穿透过程中的速度云图:(a) 水驱动弹头辅助注塑工艺(W-PAIM);(b) 气体驱动弹头辅助注塑工艺(G-PAIM)

    Figure  11.  Velocity clouds during fluid-projectile-assisted injection molding (F-PAIM) penetration: (a) W-PAIM; (b) G-PAIM

    表  1  4种工艺方法成型的工艺参数

    Table  1.   Process parameters of the four process methods of molding

    Process parameter Value
    Melt temperature/℃ 240
    Fluid injection delay time/s 4
    Melt injection pressure/MPa 7
    Fluid injection pressure/MPa 6
    Mold temperature/℃ 60
    Pressure-holding time/s 10
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出版历程
  • 收稿日期:  2023-07-03
  • 修回日期:  2023-08-08
  • 录用日期:  2023-08-27
  • 网络出版日期:  2023-09-07
  • 刊出日期:  2024-05-01

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