自动吹瓶机机械设计论文

聊城大学东昌学院

本科生毕业论文（设计）

题目：自动吹瓶机设计

专业代码：080251

作者姓名：赵刚

学号：***********

单位：聊城大学东昌学院

指导教师：***

2012年5月8日

聊城大学东昌学院本科毕业论文（设计）

目录

前言 (1)

课题的背景 (1)

课题的意义 (2)

1.整体方案的确定 (4)

1.1中空成型分类 (4)

1.2工作原理及主要构成 (5)

1.2.1 工作原理 (5)

1.2.2 主要构成 (5)

1.2.3 双工位挤出吹塑中空成型机 (6)

1.3整体方案确定 (7)

2.挤出机的选用 (8)

2.1挤出机机组的主要构成 (8)

2.2塑料挤出机的分类 (11)

2.3型号的选择 (11)

3.机头及其零件设计 (12)

3.1机头分类 (12)

3.2机头的结构设计 (13)

4.合模与吹气机构设计 (16)

4.1导向与合模机构 (16)

4.2吹气装置 (17)

5.机架和导轨的设计及计算 (19)

5.1机架的设计计算 (19)

5.2导轨的设计计算 (20)

结论 (22)

参考文献 (23)

致谢 (24)

摘要

此论文主要讲述的是吹瓶机的设计，它是成型塑件的一种重要工艺装备。挤出吹塑中空成型是利用塑料的可挤压性和可模塑性，使粘流状态的塑料（位于挤出机机螺杆的计量段）在螺杆的作用下，通过机头获得壁厚一致或壁厚按制品形状有规律的分布的管胚。移动两片模具合模将管胚夹住，并通过切割刀将管胚切断。在将管胚切断之前必须进行预吹气，其目的主要是为了防止管胚壁之间粘连。合模后吹气装置将管胚口封死，同时吹入一定压力的气体，使处于粘弹状态的型胚紧贴模具模腔内壁，两半模分开，即获得所需中空制品。根据其技术要求和使用要求，选择塑料种类为聚氯乙烯(HPVC)，再根据塑料的形状和生产批量，选择SJ—65塑料挤出机。

这里所设计的成型机为塑料单层、单模挤出吹塑中空成型机。在确定成型机结构方案后，绘制成型机装配图，并进行计算。最后绘制成型机非标准零件图，经全面审核后投产制造。

关键词：中空成型；吹瓶机

Abstract

This paper focuses on the blowing machine design, molding plastic parts it is an important technique and equipment. Extrusion blow molding is the use of hollow plastic extrusion and can be molded so that the state of viscous flow of the plastic (in the extruder screwmea-surement above) under the action of the screw through the nose to obtain wall thickness wall thickness manufactured by the same or the shape of the governing law of the distribution of embryos. Mobile 2 Die Die tube embryos to be caught, and tube cutter to cut off the embryo. Embryo cut in the pipe must be carried out before the pre-blowing, and its main purpose is to prevent the adhesion between the wall tube embryos. Die inflatable device after I sealed tube embryos, while the gas insufflation pressure, so that in the viscoelastic state of the type embryos die close to the inner wall cavity, the two separate half-module, that is, to obtain the necessary products hollow. In accordance with its technical requirements and application requirements, select the type of PVC plastic, and then based on the shape of plastic and production volume, select the SJ-120 Plastic Extruder.

Here the design of plastic molding machine for single-layer, single-mode hollow extrusion blow molding machine. In determining the structure of the program machine after machine assembly drawing and calculation. Finally, non-standard parts forming machines drawn map, a full assessment by the manufacturer after the operation.

Key words: hollow molding, blow moldimg machineblow