共查询到17条相似文献,搜索用时 109 毫秒
1.
2.
3.
4.
5.
6.
串联式磨盘螺杆挤出机一步法挤出成型木塑复合材料的研究 总被引:6,自引:0,他引:6
对串联式磨盘螺杆挤出机一步法挤出成型木塑复合材料进行了实验研究,探讨了植物纤维种类、木粉填充量对复合材料力学性能的影响,并在相同配方的条件下对磨盘挤出机和异向平行双螺杆挤出机加工的木塑复合材料的力学性能进行了比较。研究结果表明串联式磨盘螺杆挤出机更适合于高填充木塑复合材料的挤出成型加工。 相似文献
7.
8.
9.
10.
11.
12.
13.
14.
田军;马秀清;武学伟;李彦辉 《中国塑料》2010,24(8):99-102
研究了啮合同向双螺杆挤出机中具有不同捏合盘错列角、不同捏合盘厚度的螺杆构型的捏合块元件对造粒过程中聚丙烯(PP)降解的影响。结果表明,随着捏合盘错列角的增加和捏合盘厚度的增大,PP的降解加剧。 相似文献
15.
16.
啮合型同向旋转双螺杆挤出机的螺杆特性及其应用 总被引:1,自引:0,他引:1
介绍了啮合型同向旋转双螺杆挤出机的起源和发展,着重论述了该型挤出机挤压系统中的螺杆型式、螺纹元件和捏合元件的输送及混炼特性、螺杆组合型式和操作条件以及应用情况。 相似文献
17.
Effect of extruder elements on fiber dimensions and mechanical properties of bast natural fiber polypropylene composites 下载免费PDF全文
Ahmed Mohammed Moneeb El‐Sabbagh Leif Steuernagel Dieter Meiners Gerhard Ziegmann 《应用聚合物科学杂志》2014,131(12)
Illusions and facts about aspect ratio and the corresponding mechanical properties of the polypropylene flax are studied in this work. Selection of extruder elements controls significantly the fiber final dimensions. Hence, the load transfer efficiency can be improved. Different extruder layouts are tried. First and second trials investigate the mixing degree effect using kneading elements with eight and four kneading elements, respectively. The third and fourth trials keep four kneading blocks but differentiate in using multiprocessing element MPE and toothed elements, respectively. All the four configurations are tested at different shearing rates namely 100, 200, and 300 rpm and different fiber loadings 10, 20, and 30 wt %. Polypropylene (PP) with high flowing properties and slivers flax natural fibers are used. The output extruded strands are mechanically tested. The third and fourth configurations showed superiority to the normal kneading profiles regarding the mechanical properties. Samples of composites are withdrawn after each processing extruder element to study the effect of this element on the fiber dimension. Measurement of extracted fibers is carried out by two methods namely dynamic image analysis machine and secondly normal microscopic investigation. Weibull distributions are defined for fiber geometry distributions for the different locations on the extruder configuration. Also, the effect of the shear rate and the extruder configuration on the final dimensions of the fibers extracted from the composite. The results show the correlation between extruder configuration and fiber aspect ratio and hence the composite overall strength. However, further processing like injection molding erases the pre‐extrusion effect. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40435. 相似文献