Effect of fiber content and wall slip phenomenon on the polymer filling behavior in thermoset injection molding and simulation process

纤维含量和壁滑移现象对热固性注塑和模拟过程中聚合物填充行为的影响

• 批准号: 437971453
• 负责人: Professor Dr.-Ing. Michael Gehde (†)
• 金额: --
• 依托单位: Professur Kunststoffe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/437971453?language=en
• 关键词: Effect; fiber; content; wall; slip

The demand of using simulation processes in the industrial manufacturing environment has been increased in recent years because of its various advantages. The necessary requirements for good simulation results are correct and complete material data. With thermosets injection molding simulation, its material data are found in limited sources and are seldom available from data bank of simulation tools. The generation of material data requires an extensive knowledge in measurement of rheological and thermal properties as well as optimization algorithm. In addition, to simulate exactly the thermosets injection molding compound process, it requires a profound knowledge in the mold filling characteristics of thermoset injection molding compounds.Concerning this matter the Professorship of Plastics Engineering found a completely opposite mold filling behavior of thermosets and thermoplastics by an own-developed effective and useful method. Specifically, for the thermoset injection molding, there is a strong slip between the thermoset melt and wall surface, which is not found for the injection molding of thermoplastic materials. However, the variables like amount of fiber and filler, the mold surface roughness and mold pressures that can influence the slip phenomenon has not yet been investigated. Furthermore, the integration of the knowledge about the up to now unknown slip phenomenon into the simulation models is still missing. Therefore, this research proposal focuses on two scientific key goals.The first one is to gain a complete understanding of the relationships between the influencing parameters and the mold filling behavior of fiber-reinforced thermoset injection molding compounds. The second one is the development of simulation models which describe the investigated mold filling behavior. A validation of the simulation results with experimental results will show whether the quality of the models is sufficient for the development of an authentic thermoset injection molding simulation process, which helps industrial companies to increase the success of the design, to shorten development cycles as well as to predict potential defects.

近年来，由于其各种优势，在工业制造环境中使用模拟过程的需求增加了。良好仿真结果的必要要求是正确且完整的材料数据。使用热固性注塑模拟模拟，其材料数据可在有限的来源中找到，并且很少可以从模拟工具的数据库中获得。材料数据的生成需要广泛的知识，以测量流变和热性能以及优化算法。此外，为了准确模拟热固性注入成型化合物过程，它需要在热固性注入模制化合物的模具填充特征上有深刻的知识。概括这一问题，塑料工程的教授发现了一种完全相反的模具填充行为，并通过自己开发的有效和有用的有效的方法。具体而言，对于热固性注射成型，热固性熔体和壁表面之间存在强烈的滑动，这对于热塑性材料的注射成型找不到。但是，尚未研究变量，例如纤维和填充物，霉菌表面粗糙度和可能影响滑动现象的霉菌压力。此外，仍然缺少有关现在未知的滑移现象到仿真模型中的知识的整合。因此，该研究提案的重点是两个科学的关键目标。第一个是对影响参数与纤维增强热固性热固性注入成型化合物的模具填充行为之间的关系的完全了解。第二个是模拟模型的开发，这些模型描述了所研究的霉菌填充行为。通过实验结果对仿真结果的验证将表明模型的质量是否足以开发真实的热固性注塑成型模拟过程，这有助于工业公司增加设计的成功，缩短开发周期以及预测潜在的缺陷。