Pheology and Heat Transfer Control of Microscale Instability Phenomena on Injection Molded Polymer Surfaces

注塑聚合物表面微观不稳定性现象的流变学和传热控制

基本信息

批准号：
09450086
负责人：
KUROSAKI Yasuo
金额：
$ 8.38万
依托单位：
UNIVERSITY OF ELECTRO-COMMUNICATIONS
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450086/
关键词：
Injection Molding Skin Layer Super Precision Molding Technique Biretringence Surface Transcribability Molding Limit Flow Mark Cooling Control 高精度成形技術伝熱制御光学的計測残留複屈折

项目摘要

The widely varying and still speculative nature of existing flow mark generation hypotheses indicated that there was no clear understanding of the generating mechanism yet. Based on the results of the literature study. two main research questions were formulated : (1) Provide a description of flow mark generation : Where, and how do wavelike flow marks generate? (2) Provide an explanation for flow mark generation : Construct an hypothesis for the mechanism by which wavelike flow marks are caused. Experiments were done to obtain the following information : (1) determination of the point of generation of flow marks, i.e., before, after, or at the contact line between the melt and the mold, and (2), observation of the actual generation process. This was accomplished using an injection molder equipped with a specially designed mold with an observation window. (3) Microscopic surface profile analysis after molding also played an important part in the experimental investigation. Specific attention was given to the effect of the thermal boundary conditions on the micro-geometry of flow marks. Analytical and numerical methods were used to model the heat transfer in the flow front and contact line areas. Phenomenological and mathematical models for explaining the flow mark generation mechanism were developed. The models are based on presumed thermal deformation of the solidifying layer in the area immediately behind the contact line. The mathematical model could be correlated with experimental data over a wide range of operating conditions and for three different materials. The main conclusion is that non- uniform thermal contraction in the solidifying layer behind the contact line appears to be the dominating factor in the mechanism by which wavelike flow marks generate.

现有流痕生成假说的广泛变化和推测性质表明，人们对生成机制还没有清晰的认识。基于文献研究的结果。提出了两个主要研究问题：（1）提供流痕生成的描述：波状流痕在何处以及如何生成？ (2) 解释流痕的产生：对波状流痕的产生机制提出假设。进行实验以获得以下信息：（1）确定流痕的产生点，即在熔体与模具之间的接触线之前、之后或处，以及（2）观察实际产生的情况过程。这是通过配备有专门设计的带有观察窗的模具的注塑机来完成的。 (3)成型后的微观表面轮廓分析在实验研究中也发挥了重要作用。特别关注热边界条件对流痕微观几何形状的影响。使用分析和数值方法对流动前沿和接触线区域的传热进行建模。开发了用于解释流痕生成机制的现象学和数学模型。这些模型基于接触线紧后方区域中凝固层的假定热变形。该数学模型可以与多种操作条件下和三种不同材料的实验数据相关联。主要结论是，接触线后面的凝固层中的不均匀热收缩似乎是波状流痕产生机制中的主导因素。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

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Louis Tredoux, Isao Satoh, Yasuo Kurosaki: "A Heat Transfer Study of the Wavelike Flow Mark Generation Mechanism on Injection Molded Products" Seikei Kakou. 63. 732-741 (1998)

Louis Tredoux、Isao Satoh、Yasuo Kurosaki：“注塑产品上波状流痕生成机制的传热研究”Seikei Kakou。

DOI：
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通讯作者：

Louis Tredoux: "About the Generation Mechanisms of Wavelike Flow Marks in Injection Molding at Slow Injection Velocities" 成形加工シンポジア'97. 277-80 (1997)

Louis Tredoux：“关于慢速注射成型中波状流痕的生成机制”成型研讨会 97 277-80 (1997)。

DOI：
发表时间：
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0
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通讯作者：

Louis Tredoux, Yasuo Kurosaki, Isao Satoh: "Investigation of Flow Marks Generation in Polymer Injection Molding from a Thermal Engineering Viewpoint" Proc.Tenth Int'l.Symp.Transport Phenomena in Thermal Science and Process Engr.713-718 (1997)

Louis Tredoux、Yasuo Kurosaki、Isao Satoh：“从热工程角度研究聚合物注射成型中流痕的产生”Proc.Tenth Intl.Symp.Transport Phenomena in Thermal Science and Process Engr.713-718 (1997)