摘要：目前随着工业技术的发展，以及高效生产要求的提出，模具在机械生产中的地位越来越高。同时随着以塑料代替金属的理念提出，一些不需过高结构性和材料性能要求的零件逐步被塑料制品所取代，而在实际生产中绝大多数塑件是由注塑模具成型。据调查目前塑料模具工业中热流道注塑模具为发展趋势，以减少流道废料的产生，适应低成本、高质量的发展要求。本论文从注塑工艺角度出发，以轻量化、高效化、高质量为主要依据，系统性的阐述了材料分析到工艺参数，再到模具结构设计及其制造方法。并提出了多套设计方案，根据分析计算选择合理方式，在运用热流道注塑模具的同时又不同于传统热流道注塑模具，进行了新型的尝试方法，使得热流道技术能够在两板模具上面实现多型腔布局，为热流道技术的发展提供了一定的参考。此外对于流道平衡技术也通过浇口平衡的方式得以解决，从而实现了异形塑件的多腔两板热流道注塑模具的设计。

关键词： 多腔注塑模具；热流道技术；流道平衡

Injection molding process and mold design for camera battery box cover

Abstract: At present, with the development of industrial technology and the presentation of the requirement efficient production requirement , the status of mold in mechanical production is higher and higher. At the same time, with the idea of replacing metal with plastics, some parts that do not require properties which are excessive structural and material are gradually replaced by plastic products, while in actual production, most plastic parts are molded by injection mold. According to the investigation,at present, the hot runner injection mold in the plastic mold industry is developing a trend which can reduces the production of runner waste and adapts to the requirements of the low cost and high quality development. From the angle of injection process, this paper is based on light quantization, high efficiency and high quality, and systematicly states the material analysis to process parameters, and then to mold structure design and manufacturing method.And puts forward multiple sets of design schemes and according to the analysis and calculation to choose the rational method. At the same time, in the application of hot runner injection mold, while different from traditional hot runner injection mold, carries out a new method of trial, which making the hot runner technology can realize multi-cavity layout on two plate mold, to provide certain reference for the development of hot runner technology. In addition, the runner balancing technique is also solved by the way of gate balance, which can realize the design of the injection mold for the multi-cavity and two plate hot runner of the special-shaped injection parts.

Key Words: Multi-cavity injection mold ; hot runner technique ; runner balance

目  录

1 绪论1

2 塑料成型分析3

2.1 塑件结构分析4

2.2 塑件工艺分析4

2.2.1 塑件结构工艺分析4

2.2.2 ABS塑料性能分析4

2.2.3 ABS塑料成型特点5

2.2.4 注射成型工艺过程及工艺参数6

3 注塑机选择及相关参数校核9

3.1 型腔数量及排列方式选择9

3.2 注塑机选择10

3.2.1 注塑量计算10

3.2.2 锁模力计算12

3.2.3 选择注塑机14

3.3 型腔数量及有关参数校核14

3.3.1注型腔数量校核14

3.3.2 注塑机工艺参数校核15

4 模具设计16

4.1 分型面位置和形式确定18

4.1.1 分型面位置16

4.2.2 分型面形式确定17

4.2 浇注系统设计18

4.2.1 浇口形式确定19

4.2.2 主流道设计19

4.2.3 分流道设计23

4.3 模具成型零部件设计和计算29

4.4 模架的确定和标准件选用29

4.5 合模导向机构29

4.6 脱模推出机构设计30

4.6.1 脱模力计算30