单螺杆挤出过程计算机仿真系统的研究开发

通过建立挤出过程的三段七区数学模型及各种物性及螺杆参数数据库，使用高级编程语言VisualC 6.0OpenGL等软件，开发了完全基于Windows的单螺杆挤出过程计算机仿真系统。本系统能近似地模拟聚合物挤出成型过程，并预测加工条件变化对制品的影响。     

用于单螺杆挤出过程仿真的螺杆参数数据库的开发

介绍了用于单螺杆挤出机挤出仿真过程的螺杆几何参数数据库,数据库主要收录了普通三段式螺杆和BM型螺杆几何参数.用SQL Server2000数据库系统软件完成数据库的设计,用Visual Basic6.0(简称VB6.0)实现前台用户操作界面的设计,利用VB6.0的ADO控件实现前台用户操作界面和后台SQL Server 2000数据库的连接.建立的数据库为挤出过程模拟仿真系统提供必要的数据支持.     

基于LabVIEW的单螺杆-熔体泵串联挤出过程数据采集系统开发

LabVIEW是NI公司开发的图形化编程软件。基于虚拟仪器软件平台LabVIEW,开发了单螺杆-熔体泵串联挤出系统挤出过程中温度、压力、扭矩、转速等参数的数据采集与监测系统,实现对挤出过程中动态参数的实时采集、显示、保存,并具有数据回显的功能,可对采集的信号进行分析比较。比系统具有测量准确,操作简单,使用方便的特点。     

新型的PET挤出设备

据Mod Plast的2007年第11期报道，德国Battenfeld Extrasiontechnik公司开发出新的PET用单螺杆挤出系统，无需干燥物料即可直接加工。新系统生产能力为800～1000kg／h，其创新之处是单螺杆挤出机配有专门开发的行星齿轮式脱气段。     

精密挤出医用导管的开发与研究

本文系统论述了国内外医用导管的生产现状、应用领域和市场前景，开发了精密挤出实验台和单螺杆精密挤出机，并用于医用导管的开发与生产。结果表明：采用并联稳压装置、熔体泵、压力波动控制器、精密控制系统以及先进的在线测量控制系统是能够满足精密医用导管挤出的要求的。     

单螺杆挤出各区段数学模型的衔接方法研究

简要介绍了单螺杆挤出过程的三段七区物理模型.在正确处理各区段边界条件、区段间分界点及衔接条件基础上,采用面向对象程序设计语言C++,对各功能段进行了有效连接,实现了描述整个单螺杆挤出过程的算法的稳定性与收敛性,所得的压力、温度等变量的计算结果与实验值吻合较好.     

国内外精密挤出技术现状与进展

论述了单螺杆挤出机理研究、动态挤出机理研究、影响精密挤出工艺因素和设备因素等方面的研究进展，并提出了实现精密挤出过程的技术装备条件。     

用于聚乙烯管材加工的新系列单螺杆挤出机

巴顿菲尔中国子公司在中国市场投放新系列的单螺杆挤出机，这个系列的挤出机应用了由其姐妹公司德国巴顿菲尔挤出技术公司开发的革新性设计。新的单螺杆挤出机的特点是，尽管原有螺杆长度保持不变而挤出量显著提高，尤其是对于聚烯烃原料的加工。另外，巴顿菲尔开发了多种无屑切割机供客户选择以满足他们的不同要求。     

聚乙烯管材加工用的新系列的单螺杆挤出机

巴顿菲尔中国子公司在中国市场投放新系列的单螺杆挤出机，这个系列的挤出机应用了由它的姐妹公司德国巴顿菲尔挤出技术公司开发的革新性设计。新的单螺杆挤出机的特点是：原有螺杆长度保持不变而挤出量显著提高，尤其是对于聚烯烃原料的加工。另外，巴顿菲尔开发了多种无屑切割机供客户选择以满足他们的不同要求。     

巴顿菲尔在中国市场推出新型单螺杆挤出机及切割机

巴顿菲尔中国子公司——佛山市巴顿菲尔塑料设备有限公司，在中国市场推出了新系列的单螺杆挤出机。这些挤出机应用了由它的姐妹公司德国巴顿菲尔挤出技术公司开发的革新性设计。新的单螺杆挤出机的特点是，原有螺杆长度保持不变而挤出量显著提高，尤其是对于聚烯烃原料的加工。另外，巴顿菲尔还开发了多种无屑切割机以满足客户的不同要求。     

单螺杆挤出机螺杆计算机辅助设计软件的研究与开发

主要介绍了基于VisualBasic的单螺杆挤出机螺杆计算机辅助设计软件,绘图软件选用Solid works,阐述了Solidworks相对于二维CAD软件的优点,该软件能与仿真系统接口,得到挤出过程的温度、速度、压力等曲线,分析这些曲线,进而指导螺杆的设计。最后给出了普通三段式螺杆的设计实例。     

螺杆挤出技术加工火炸药的研究进展

从螺杆挤出技术加工火炸药的安全性分析、所加工物料类型以及物料性能改善三方面综述了火炸药螺杆挤出技术的研究进展,指出单螺杆挤出技术存在内摩擦力较高和双螺杆挤出技术建压不足等问题,说明了锥形双螺杆挤出机加工火炸药的适应性。     

新型往复式混炼螺杆设计

研制出一种新型往复式混炼螺杆的结构形式该种新型混炼螺杆通过减小挤出过程中的漏流量来提高螺杆的输送效率,并保持物料在螺纹间均匀混炼,提高物料的混炼质量。     

螺杆挤出式3D打印机结构设计与仿真分析

分析了传统桌面级FDM型3D打印机与螺杆挤出式3D打印机的挤出原理,为提升桌面级FDM型3D打印机对打印材料的兼容性并降低打印材料的制作成本,设计了螺杆挤出式3D打印机新结构,具有螺杆与机筒便捷拆换功能。结合设计计算获得了适用于打印丙烯腈-丁二烯-苯乙烯共聚物（ABS）材料的螺杆计量段结构,在螺杆低转速与小型化的要求下,可实现小流率高精度打印并可通过提高转速获得更高的流率。通过仿真实验的方法,分析了计量段熔体的速度场、压力场以及剪切速率场的特征。使用最小二乘法,得出了螺杆转速与出口流率对应的回归方程,验证了计算结果的合理性。结果表明,螺杆挤出机构能够适用于3D打印,可降低打印成本并拓宽可打印物料的选择范围,并可通过对螺杆转速的控制实现对物料挤出流率较为精确的调节。     

同向双螺杆挤出特点及螺杆组合原则

在可视化挤出试验的基础上叙述了同向双螺杆挤出的特点,并将其与单螺杆和异向双螺杆进行了比较,以及对同向双螺杆挤出工艺制定中的关键问题-螺杆组合进行了探讨。     

A die rotating system for moderations of extrusion load and pressure drop profiles for molten PP and wood/polypropylene composites in extrusion processes

A die‐rotating system was proposed in this work for moderations of extrusion forces and entrance pressure drop for molten polypropylene (PP) and wood/polypropylene (WPP) composites in a capillary rheometer and a single screw extruder. The effects of processing conditions and wood loading in PP were of our interests. The extrusion force and entrance pressure drop with and without the die rotating system were monitored in real‐time. This was the first time that the die‐rotating system was used for processing of highly viscous wood/polymer composite materials. It was found that the flow properties of the molten PP and WPP composites obeyed pseudoplastic non‐Newtonian behavior. The behavior was more obvious at wood contents of above 6 wt % and in the capillary rheometer. The rotation of the die could moderate the extrusion load by 60% and entrance pressure drop by 20% in the capillary rheometer, and the entrance pressure drop by 30% in the single screw extruder, especially at the conditions where the viscosities of the WPP and the extrusion rate were high. Greater fluctuations in entrance pressure drop caused by die rotation were observed in the single screw extruder. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120:1006–1016, 2011     

低发泡HIPS挤出成型工艺的研究

利用试验设计方法研究了HIPS低发泡过程中,挤出温度及螺杆转速对发泡制品的表现密度,泡孔尺寸,泡孔尺寸均匀度以及制品强度的影响,实验结果表明：随着扩是出温度的提高,制品的表观密度会有所升高;螺杆转速与挤出温度对表观密度的影响存在交互作用,在较高的温度下,螺杆转速对表观密度没有显著的景,是在较低的温度下,随着螺杆转速的提高,表观密度会有所增大,另外,螺杆转速对泡孔尺寸以及泡孔尺寸分布均匀度有较显著的影响,随着螺杆转速的扣高,泡孔尺寸大小降低,并且泡孔尺寸均匀度提高,因而制品的强度较大,温度的提高对泡孔的尺寸影响不大,但使泡孔尺寸均匀度下降,在所研究的工艺条件范围内,选择较低的挤出温度及较高的螺杆转速有利于得到性能较好的低发泡制品。     

Studies on the theory of single screw plasticating extrusion. Part II: Non-plug flow solid conveying

A non-plug solid conveying theory for plasticating extrusion is proposed in this paper. The polymer granules are treated as-bulk pellets which move down the screw channel at different speeds, rather than as a plug which never experiences deformation during extrusion. The pellets system is considered as a linear elastic system, and can only resist compressive forces but riot tensile forces. Based on elastic mechanics and virtual work principles, a mathematical model for non-plug solid conveying is proposed. Finite element method (FEM) is used to determine the relationships between internal stress and velocity profiles of the pellets in the screw channel, the internal stress states at any point in the screw channel, etc. The prediction also proved the existence of the optimum depth of the screw channel and the optimum helix angle of the screw. Most of the experiments have been carried out on an extruder with glass windows it its barrel. The experiments confirm the validity of the theory.     

单螺杆挤出机—熔体泵串联挤出系统的性能与应用

从原理与应用方面，分析、探讨了单螺杆挤出机-熔体泵串联挤出系统的优异性能以及在塑料挤出成型领域的高效应用。     

Investigation of the poly(vinyl chloride) extrusion process using a feed throat with a feed pocket

The effectiveness of the extrusion process depends on a number of factors, the most important being barrel design, e.g., longitudinal or helical grooves; screw, feed opening, and polymer hopper designs are significant in this respect, too. The effect of these factors on the extrusion process has been thoroughly discussed in the available literature. This notwithstanding, there is little information providing insight on the effect of a feed pocket made below the feed opening, on the side of the barrel toward which the screw rotates, on the main characteristics of the extrusion process. For the experiments, five special profile inserts with different feed pocket depths were made and then mounted in the extruder barrel equipped with a 25‐mm diameter screw. The extrusion of plasticized poly(vinyl chloride) (PVC) at the screw speed ranging from 30 to 150 rpm was investigated. Presented graphically as charts, the obtained results show the dependences of extrudate temperature, extruder screw torque, polymer output, power supplied to the extruder and conveyed by the polymer, unit energy consumption and energy efficiency on the feed pocket depth, and screw speed. It has been found that the feed pocket made in the extruder barrel has little effect on the course and effectiveness of plasticized PVC extrusion and does not worsen the studied properties of the received extrudate; yet, it should be taken into account to ensure the highest polymer output and lowest energy consumption. POLYM. ENG. SCI., 54:2037–2045, 2014. © 2013 Society of Plastics Engineers