机械毕业设计（论文）-双螺杆挤出机的毕业设计全文.doc

摘要
本文是关于工业用塑料聚合物双螺杆挤出机的设计。在工业上和实验室中,单螺杆和双螺杆挤出机都应用极其普遍,是塑料加工设备的重要元部件之一。作为工业中使用的双螺杆挤出机,在设计过程中,除了要求能够完成固体输送、增压、熔融、熔体输送和泵压等一系列通用过程以外,还要求涉及到复合塑料与聚合物颗粒之间的混合,以及物料喂料量的控制。物料喂料量的控制则是通过控制主螺杆及其辅助喂料螺杆的转速来完成的。同时,双螺杆挤出机具有分布混合和分散混合效果良好、自洁作用较强、可实现高速运转、产量高等特点,特别适合聚合物的改性,如共混、填料、增强及反应挤出。有利于增加挤出机的挤出产量,提高塑化质量。
关键词:双螺杆挤出机;塑料;同向啮合
ABSTRACT
This paper is about the design of plastic polymer single-screw extruder that used in single-screw extruder is extensively used in the fields of industry and experiment,and it is one of the important units of polymer processing a single-screw extruder used in industry,it requires plete a series of general process such as transportation of solid,increase of pressure,melt,transportation of ,it refers to mix posite plastics and polymer grain,and the control of the material feed are the innovations in this the base of the design mon single-screw extruder,i increased two auxiliary feed screws which are used to transportate materials posite plastics and used it to mix kinds of control of the quantity of material feed is done by the control of the chief screw and the speed of auxiliary feed ,i used twin wedge-shaped thread section in the design of screw thread is good to increase the e of the extruder, and to improve the quality of paring mon tectangular thread section.
Keyword: Single-screw Extruder; plastics; Industry
目录
第1章绪论…………………………………………………………………1
塑料挤出成型概述…………………………………………………1
塑料挤出成型设备的组成…………………………………………1
挤出机的分类………………………………………………………2
分类方法…………………………………………………………2
各挤出机的结构特点及用途……………………………………2
设计类型的确定………………………………………………………3
第2章同向啮合双螺杆挤出机……………………………………………4
同向啮合双螺杆挤出机工作原理及其特性………………………4
同向啮合双螺杆挤出机的主要技术参数和规格…………………4
第3章同向啮合双螺杆挤出机主要零部件的设计………………………7
主螺杆的设计………………………………………………………7
螺杆的基本尺寸初步确定………………………………………7
螺杆材料的选择…………………………………………………8
螺杆设计计算……………………………………………………8
螺杆的强度校核与计算………………………