Development of Effective Method for Detecting the Contact Conditions between Dies and Thermosetting Resin Compound and the Solidification Front in Transfer Molding Processes

开发用于检测模具和热固性树脂化合物之间的接触条件以及传递模塑过程中的凝固前沿的有效方法

• 批准号: 03452115
• 负责人: SAIKI Hiroyuki
• 金额: $ 4.54万
• 依托单位: KUMAMOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452115/
• 关键词: Thermosetting Resin; Thermal Contact Condition; Ultrasonic wave; Contact Ratio; Solidification Front; Geometric Accuracy; Die Separation; Reflection of Wave; 複合材; 凝固; 圧縮成形; 変形抵抗

The reflection of ultrasonic wave depends on a real contact area between die and material, acoustic impedance of interface materials, and a contact geometry of the interface. In this experiment we examined the maximum wave intensities reflected from upper and lower flat die surfaces during a molding process. The relative intensity of the reflecting wave was defined as ratio of the intensity during molding to that before molding. The change in the relative intensity has corresponded sensitively with a filling rate or a contact ratio of the resin at the interface, development of solidification of the resin because of the change in acoustic impedance and the separation of resin from the die surface due to the shrinkage of molded material. It has been also clarified that the relative intensity has the close relation with overall thermal resistance at the interface. Thus, a newly developed method measuring transient contact conditions provides the effective tool to optimize the process coditions for forming accurate shapes or good properties.

超声波的反射取决于模具和材料之间的真实的接触面积、界面材料的声阻抗以及界面的接触几何形状。在这个实验中，我们研究了在成型过程中从上下平模表面反射的最大波强度。反射波的相对强度被定义为成型期间的强度与成型之前的强度之比。相对强度的变化敏感地对应于界面处树脂的填充率或接触率、由于声阻抗的变化而引起的树脂固化的发展以及由于模制材料的收缩而引起的树脂从模具表面的分离。还阐明了界面处的相对强度与界面处的总热阻有密切关系。因此，一种新开发的测量瞬态接触条件的方法提供了有效的工具，以优化工艺条件，形成精确的形状或良好的性能。

项目成果

Hiroyuki Saiki: "Estimation of Contact Conditions in Lubricated Frictional Interface Forging Processes by Using Ultrasonic Examination" Proceedings of the Fourth International Conference on Technology of Plasticity. vol.2. 1126-1131 (1993)

Hiroyuki Saiki：“利用超声波检测估计润滑摩擦界面锻造过程中的接触条件”第四届国际塑性技术会议论文集。

Hiroyuki Saiki: "An Experimental Study of transient Contact Conditions during Ring Upsetting Forging Processes (Ultrasonic Examination)" Proceedings of 4th Japan-China Joint Symposium on Precision Forging.pp. 99-102 (1992)

Hiroyuki Saiki：“环镦锻过程中瞬态接触条件的实验研究（超声波检测）”第四届日中精密锻造联合研讨会论文集.pp。

Hiroyuki Saiki: "Estimation of Frictional Shearing Stress under Lubricated Contact Interface in Ring Upsetting (Application of Ultrasonic Examination)" The Proceedings of The 1993 Japanese Spring Conference for The Technology of Plastictiy. pp. 123-126 (1

Hiroyuki Saiki：“环镦润滑接触界面下摩擦剪切应力的估计（超声波检测的应用）”1993 年日本塑性技术春季会议论文集。

Hiroyuki Saiki: "Estimation of Contact Conditions of Frictional Interface in Forging Processes Using Ultrasonic Examination" Transactions of The Japan Society of Mechanical Engineers. Vol.59, No.562. pp. 332-337 (1993)

Hiroyuki Saiki：“使用超声波检查估计锻造过程中摩擦界面的接触条件”日本机械工程师学会会刊。

濟木 弘行: "鍛造加工における超音波測定による摩擦接触状態の評価" 平成4年度塑性加工春季講演会講演論文集. 2. 483-486 (1992)

Hiroyuki Kazuki：“锻造过程中通过超声波测量评估摩擦接触状态”1992 年春季塑料加工会议论文集 2. 483-486 (1992)。