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A Study of Super Precise Injection Molding Technique Assisted by Radiation Energy

辐射能辅助超精密注射成型技术研究

基本信息

批准号：
08555052
负责人：
KUROSAKI Yasuo
金额：
$ 12.03万
依托单位：
THE UNIVERSITY OF ELECTRO-COMMUNICATIONS (1997-1998)Tokyo Institute of Technology (1996)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

In this research project, usage of infrared radiation energy was proposed to significantly improve the total quality of the injection molded polymer products. CO2 laser provided from the outside of the mold cavity was introduced through an optically transparent window of Zinc-selenide installed in the mold to prevent temperature drop of the molded polymer melt during the filling stage. Feasibility and effectiveness of this method was investigated and discussed through the experimental molding as well as the numerical heat transter analysis. In the first year, improvement of the residual birefringence (one kind of optical strain) in the products and transcription ability on product surface was experimentally studied by using the method. In the second year, temperature distribution within the molded polymer melt under irradiated was numerically estimated to make the characteristics clear, and improvement of the flow limitation in a thin flow path was experimentally studied. In the third year (final year), thin disk molding that simulates the practical process was performed according to the results obtained in the previous two years to give a general discussion for this method. And usage of a halogen lamp was tried and studied to propose a cheaper system that seemed to be desirable for the practical use. The results obtained in this research project are summarized as below :1. This method can significantly decrease the residual birefringence within the products.2. This method can considerably improve the transcription ability on the molded polymer surface that followed the fine mold wall geometry.3. This method can maintain flow ability in a quite thin flow path.4. This method can realize above advantages without considerable elongation of the process cycle time.5. This method can be achieved with some other radiation source by choosing appropriate molding material and transparent mold window.

在本研究计画中，提出利用红外线辐射能量，以大幅提升射出成型聚合物产品的整体品质。从模腔外部提供的CO2激光通过安装在模具中的硒化锌的光学透明窗口引入，以防止在填充阶段期间模制聚合物熔体的温度下降。通过实验成型和数值传热分析，探讨了该方法的可行性和有效性。在第一年中，实验研究了利用该方法改善产品中的残余双折射（光学应变的一种）和产品表面的转录能力。在第二年中，温度分布的模塑聚合物熔体照射下进行了数值估计，使特性清楚，并在一个薄的流动路径的流动限制的改善进行了实验研究。在第三年（最后一年），根据前两年获得的结果进行了模拟实际过程的薄圆盘成型，对该方法进行了一般性讨论。并尝试和研究了卤素灯的使用，以提出一种更便宜的系统，似乎是可取的实际使用。本研究取得的主要成果如下：1.这种方法可以显著降低产品内的残余双折射.这种方法可以显著提高在遵循精细模具壁几何形状的模制聚合物表面上的转录能力。该方法可以在较细的流道中保持流动能力.这种方法可以实现上述优点，而不显著延长工艺周期时间.通过选择合适的成型材料和透明的模具窗口，可以用其他辐射源实现这种方法。