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Joining laser‐sintered with injection‐molded parts made of PA12 using infrared welding
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-11-30 , DOI: 10.1002/pen.25596
Michael Wolf 1 , Dietmar Drummer 1
Affiliation  

Laser‐sintering offers the possibility to produce complex and individualized components cost‐effectively. To fully exploit the advantages of laser‐sintering in assemblies with mass‐produced components, high‐performance joining processes like welding are necessary. Thus, a cost‐effective customization of products can be enabled, which allows to follow the increasing trend of individualization. Infrared welding, in particular, can also be suitable for complex laser‐sintered parts due to the reduced transverse forces during joining, compared to other welding processes. The investigations show that high strength between PA12 laser‐sintered and injection‐molded components can be achieved by infrared welding. The bond strength is mainly influenced by the welding parameters. Especially a low weld pressure leads to high achievable strengths and failure outside the weld seam. Joints between laser‐sintered parts and glass fiber reinforced injection‐molded components demonstrate the transferability of the obtained knowledge. The residual melt layer thickness of the joint decreases with increasing weld pressure, as the morphological characterization shows. Besides, the typical morphological seam structure can be seen on the side of the injection‐molded component. In the area of the laser‐sintered components, a deviating morphological structure can be observed. Distinctive flow lines can be observed, spherulitic structures can only partially be seen as well as deformed spherulites.

中文翻译:

使用红外焊接将激光烧结与PA12制成的注塑零件连接起来

激光烧结可以经济高效地生产复杂且个性化的组件。为了充分利用带有大量生产的组件的组件进行激光烧结的优势,必须进行诸如焊接之类的高性能连接工艺。因此,可以实现具有成本效益的产品定制,从而可以顺应日益增长的个性化趋势。与其他焊接工艺相比,由于在焊接过程中减小了横向力,因此红外焊接尤其适用于复杂的激光烧结零件。研究表明,通过红外焊接可以在PA12激光烧结部件与注塑部件之间实现高强度。粘结强度主要受焊接参数影响。特别是较低的焊接压力会导致可达到的高强度,并在焊缝外部失效。激光烧结零件与玻璃纤维增​​强注塑零件之间的接合处证明了所获知识的可转移性。如形态表征所示,接头的残余熔体层厚度随焊接压力的增加而减小。此外,在注塑部件的侧面可以看到典型的形态接缝结构。在激光烧结部件的区域,可以观察到偏离的形态结构。可以观察到独特的流线,只能部分地看到球状结构以及变形的球晶。激光烧结零件与玻璃纤维增​​强注塑零件之间的接合处证明了所获知识的可转移性。如形态表征所示,接头的残余熔体层厚度随焊接压力的增加而减小。此外,在注塑部件的侧面可以看到典型的形态接缝结构。在激光烧结部件的区域,可以观察到偏离的形态结构。可以观察到独特的流线,只能部分地看到球状结构以及变形的球晶。激光烧结零件与玻璃纤维增​​强注塑零件之间的接合处证明了所获知识的可转移性。如形态表征所示,接头的残余熔体层厚度随焊接压力的增加而减小。此外,在注塑部件的侧面可以看到典型的形态接缝结构。在激光烧结部件的区域,可以观察到偏离的形态结构。可以观察到独特的流线,只能部分地看到球状结构以及变形的球晶。在注塑部件的侧面可以看到典型的形态接缝结构。在激光烧结部件的区域,可以观察到偏离的形态结构。可以观察到独特的流线,只能部分地看到球状结构以及变形的球晶。在注塑部件的侧面可以看到典型的形态接缝结构。在激光烧结部件的区域,可以观察到偏离的形态结构。可以观察到独特的流线,只能部分地看到球状结构以及变形的球晶。
更新日期:2021-02-08
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