包装工程课件-缓冲包装设计七步法.pptVIP

缓冲包装设计七步法 Introduction Packaging can be unnecessarily expensive in a couple of ways: 1. Inadequate design results in shipment damage 2. Over-design or poor design (more protection than is required or materials being incorrectly used ) results in excessive material cost. The procedure can be broken down into seven basic steps. Introduction 1．Determine Product Fragility Determine the amount of mechanical shock the product can survive on its own by evaluating “fragility” or “g-factor ”. 2. Determine Conditions Consider the handling and transportation environment the product will face and establish the amount of shock the product may encounter (“drop height”). 3. Calculate Cushion Requirements Use dynamic cushioning curves to determine thickness, static loading and bearing area. Introduction 4. Recognizing Design Constraints Check for important problems including compressive creep, cushion buckling and extreme temperature effects. 5. Design Prototypes and Test Build a prototype and determine its actual performance. 6. Consider Vibration Effects Determine the natural frequency of any component which is prone to vibration damage, and compare it against the vibration characteristics of your package design. Introduction 7. Monitor Performance Monitor the performance of your design to determine when internal changes in the design might alter the requirements for package performance. ( Another way for cushion design: Five steps for package cushion design ) 动画 Step 1 Determine Product Fragility Fragility is normally expressed in units of “g’s” and indicates the maximum deceleration the product can withstand without being damaged. The more fragile a product is, the lower its g-factor（Table 15.1）. Step 1 Determine Product Fragility Table 15.1 Approximate fragility of typical packaged Articles Extremely Fragile Aircraft altimeters, gyroscopes, items with delicate mechanical align