Abstract: With the rise of market raw materials and labor costs, the profitability of home appliance companies has been challenged, so reducing product costs, improving product competitiveness and profitability have become the top priority. The methods for enterprises and research institutions to reduce product costs are generally: Method 1, Use direct experience to optimize the design of the structure, and then optimize it after repeated experiments. Method 2, Use the simulation software topology to achieve a lightweight and optimized structure scheme, and finally verify it with experiments. At present, method 2 is generally used for products with high experimental cost and complex structure. However, the method 2 simulation technology is only limited to the topology optimization of a single-density product. Therefore, another research idea to reduce product cost is proposed here, which is mainly to analyze the strength of the cushion performance through simulation analysis, determine the high and low density distribution area, and maximize the low density area of the bottom cushion to achieve ultra-low cost And then use the drop simulation experiment to compare the difference before and after to confirm the reliability, and finally perform the drop experiment to confirm the final feasibility verification. Through the above development ideas, the weight of the dual-density packaging bottom pad is optimized by about 25.2% compared with the previous one. At the same time, the expensive EPP inserts are optimized to maximize the cost and provide research ideas for the later development of multi-density and lower-cost products.

Key words: Multi-density, Drop simulation analysis, Packaging materials, Cushion performance