摘 要

本毕业设计针对塑料果冻盒的注射模具进行了详细的设计与优化。果冻盒作为日常生活中的常见物品，其需求量巨大，因此提高其生产效率与产品质量具有重要意义。本设计选用PS（聚苯乙烯）作为果冻盒的材料，因其具有良好的透明性、加工性能和成本效益。在深入分析果冻盒的结构特点后，我们决定采用注射成型工艺进行生产。

在设计过程中，我们充分考虑了模具的结构合理性、加工便捷性以及生产成本。注射模具的设计包括分型面的确定、型腔布局、浇注系统、顶出机构和冷却系统等关键部分。特别是浇注系统的设计，我们采用了点浇口方式，以确保塑料熔体能够均匀、快速地填充型腔，同时减少浇口痕迹对果冻盒外观的影响。此外，我们还对模架进行了标准化选择，并对成型镶件的大小以及A/B/C板的尺寸进行了精确计算，以确保模具的精度和稳定性。

通过CAD和UG等先进设计软件，我们完成了模具的三维建模和详细设计。设计完成后，我们进行了模拟分析，验证了模具的可行性和可靠性。本设计不仅提高了果冻盒的生产效率和产品质量，还为类似塑料制品的模具设计提供了有益的参考。

关键词：果冻盒；PS塑料；注射模具；点浇口；模具优化

Abstract

This graduation design has made a detailed design and optimization for the injection mold of the plastic jelly box. As a common item in daily life, jelly box is in huge demand, so it is of great significance to improve its production efficiency and product quality. PS (polystyrene) is used as the jelly box because of its good transparency, processing performance and cost effectiveness. After a thorough analysis of the structural characteristics of the jelly box, we decided to use the injection molding process for production.

In the design process, we fully consider the rationality of the mold, processing convenience and production cost. The design of the injection mold includes the key parts of the classification surface determination, type cavity layout, pouring system, jacking mechanism and cooling system. In particular, in the design of the pouring system, we adopted the point gate method to ensure that the plastic melt can evenly and quickly fill the cavity, while reducing the impact of the gate traces on the appearance of the jelly box. In addition, we made a standardized selection of the mold frame, and accurately calculated the size of the molding insert and the A / B / C plate to ensure the accuracy and stability of the mold.

Through advanced design software such as CAD and UG, we completed the 3 D modeling and detailed design of the mold. After the design, we conducted a simulation analysis to verify the feasibility and reliability of the mold. This design not only improves the production efficiency and product quality of the jelly box, but also provides a useful reference for the mold design of similar plastic products.

Key words: jelly box; PS plastic; injection mold; point gate; mold optimization