文档介绍：大连理工大学本科毕业设计
牙膏瓶盖注塑模具设计
Design of the injection mold for the cover of a toothpaste bottle
学院(系): 机械工程学院
专业: 机械设计制造及其自动化
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大连理工大学
Dalian University of Technology
摘要
进入21世纪以来,我国在模具行业发展迅猛。模具行业为推动我国的经济生活各领域的发展做出巨大贡献。随着我国进入“十二五”快速发展时期,在机械、汽车、家电、电子信息和建筑建材等领域对塑料模具的强烈市场需求推动下,塑料模具的发展前景一片光明。其中复杂、高精度、多功能复合型模具成为未来模具行业发展的重点。我国从改革开放开始,对国外先进技术的消化吸收,特别是计算机技术在整个制造领域的成功应用更是大大地推动了模具行业的飞速发展。近年来我国在模具行业取得长足进步,新材料、新工艺、先进加工设备不断出现。模具零件的标准化、专业化和商品化已达到较高的水平。
本文设计的内容是牙膏瓶盖注塑模具。塑件的材料为聚乙烯(PE)。根据牙膏盖的结构形状特点以及现有的注塑成型工艺,采用齿轮齿条脱螺纹机构,设计了高效的旋转自动脱螺纹注塑模具。脱螺纹机构有圆柱直齿轮、齿条、直齿锥齿轮、螺纹型芯组成。为实现塑件的快速成型、脱模,采用点浇口的浇注方式以及二次分型的三板式模具结构。本文对注塑模具进行简要介绍,对于自动脱螺纹的过程以及原理进行了阐述。对齿轮齿条脱螺纹传动系统进行了设计与计算,对注塑模具中的主要零件进行了设计计算,并在设计过程中着重考虑了生产实际中的经济性和合理性。
关键词:注塑模具;内螺纹;点浇口;齿轮齿条机构
Design of the injection mold for the cover of a toothpaste bottle
Abstract
In the 21st century, the mold industry of China has rapid development. Mold industry contributes greatly to promote China's economic development in all areas of life. As China into the "second Five-Year" period of rapid development in machinery, automobile, home appliances, electronic information and the field of building materials such as plastic mold, are driven by strong market demand, and these give plastic mold industry bright prospects. The future development of the industry focuses on plex, high precision, multi-posite mold. The reform and opening up of China for digestion and absorption of foreign advanced technology, especially in the field puter technology in the essful application of the entire manufacturing has greatly promoted the rapid development of the mold industry. In recent years, China has made great progress in the mold industry, new materials, new technology and advanced processing equipment. Mold parts standardization, specialization mercialization have reached a higher level.
The content of this paper is to design the injection mold for a toothpaste cap. The material is polyethylene plastic (PE). According to the shape