Study on processing mechanism to reinforce weld line strength by advanced methods for micro injection molding

微注射成型先进方法增强焊缝强度的加工机理研究

• 批准号: 28382658
• 负责人: Professor Dr.-Ing. Gerhard Ziegmann
• 金额: --
• 依托单位: Institut für Polymerwerkstoffe und Kunststofftechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/28382658?language=en
• 关键词: Study; processing; mechanism; reinforce; weld

As a novel fabrication technology, micro injection molding is drawn much attention all over the worlds. Weld line is a usual but unfavorable flaw both in normal and in micro injection molding process. Therefore, it is important for improving the quality of injection molding parts that the weld line developing theory is understood completely. Nowadays, the weld line phenomena in normal size injection molding field has been studied maturely, but as for micro injection molding, the concentration is not enough adequate. In this project, the cold and the hot weld lines will be considered and the simulating method for micro scale weld lines forming process is intended to be built up for predicting the strength and position of the weld lines in micro injection molding. In addition the factors which influence the mechanical properties of weld lines in micro injection molding will be studied, like processing parameters, cross section shape of micro channels and V notch. The micro fluid behavior and the V notch formation during the weld line developing process will also be explored comprehensively. Furthermore, the weld line properties for different materials, like crystalline polymer, amorphous polymer, short fiber resin and metal particles filled polymer, are going to be checked up. As well as the mechanical property test methods will be developed.

微注射成型作为一种新型的制造技术，受到了世界各国的广泛关注。熔接痕是普通注射成型和微注射成型过程中常见而又不利的缺陷。因此，全面了解熔接痕展开理论对提高注塑件质量具有重要意义。目前，对于常规尺寸注塑成型领域的熔接痕现象研究已经比较成熟，但对于微细注塑成型，研究的集中度还不够高。在本项目中，将考虑冷熔接痕和热熔接痕，旨在建立微尺度熔接痕成形过程的模拟方法，以预测微注射成型中熔接痕的强度和位置。此外，还研究了影响微注射成型熔接痕力学性能的因素，如工艺参数、微通道截面形状和V型凹槽。对熔接痕形成过程中的微观流体行为和V型缺口的形成也进行了全面的探讨。此外，还将检查结晶聚合物、无定形聚合物、短纤维树脂和金属颗粒填充聚合物等不同材料的熔接线性能。以及力学性能测试方法的发展。