PET寶特瓶外觀設計對頂壓應力與位移之研究

A Study of Stress and Displacement of Top Load for PET Bottle Design

廖國書(KUO-SHU LIAO)

指導教授 ： 林世章

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2014年)

https://doi.org/10.6827/NFU.2014.00048

摘要

輕量化PET寶特瓶外觀特徵設計對於吹瓶業者及客戶應用上扮演著重要角色。一般吹瓶機產業為客戶端開發新瓶樣，設計參數絕大多數來自於客戶需求配合長年經驗，業界大多數也皆是如此，並非取得最佳設計參數的有效率程序。為此，本文將利用田口實驗設計法結合反應曲面法，提出輕量化寶特瓶耐頂壓外觀最佳化設計。
本研究係針對容積600毫升，瓶重11克，瓶厚0.15mm之輕量化PET寶特瓶由外觀設計的不同皆施以10kgf/cm2之壓力進行應力與位移分析。首先，使用特性要因分析篩選出因子及水準，透過田口方法規劃直交表後由SolidWorks Simulation分析所得到的數值尋找出對產品品質特性具顯著影響的因子。評估影響設計上的重要設計參數因子。接著，再利用反應曲面法再建立田口法所分析所得之顯著因子及目標函數之間的數學模型，以尋找最佳因子水準的組合及其最佳解。最後將所得參數組合進行實驗，並以95%信賴水準驗證最佳解之準確性。
藉由本研究將可提供相關產業輕量化PET瓶設計的參考，相信對設計效率將有明顯的助益，以期提升產業競爭力。

關鍵字

輕量化瓶型設計 ； 應力與位移分析 ； 田口方法 ； 反應曲面法

並列摘要

The design of PET bottles is concerned continuously as an important issue, because it could affect the strength of PET Bottles. However, most design parameters in the PET bottles industry almost based on engineers’ experience, it lacked a scientific procedure for acquiring optimization design parameters of PET bottles.
Therefore, the study attempted to propose a systematic procedure for optimization design parameters by integrating Taguchi analysis and response surface methods, its mechanism can facilitate engineers to eliminate a contradiction between exterior and strength of PET Bottles. A real case study, aimed at the exterior design (600 ml volume, 11 gram weight and 0.15 mm thickness) of PET Bottles, was conducted to validate the proposed procedure in 10kgf/cm2 stress and displacement of top load.
First of all, the cause & effect analysis was conducted to confirm the important factors, and then Taguchi method and orthogonal arrays was used to arrange an experimental plan. After, solidworks simulation was utilized to help engineers to evaluate the most significant factors of PET bottles exterior design and quality. Finally, the response surface method was conducted to search the optimal solutions and establish linear regression models to predict the optimal solution effect. The proposed procedure and analysis results in this study could serve as reference for industry, which establishes a standard operation procedure for optimum process design.

並列關鍵字

lightweight bottle design ； stress and displacement analysis ； Taguchi Method, Response Surface Method.

參考文獻

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