橡胶注射成型技术及其设备

本文论述了目前橡胶注射机主要装置的结构和性能特点．简要介绍了全电动橡胶注射机、气体辅助液态硅橡胶注射技术和橡胶注射模具冷流道技术的进展。     

橡胶注射成型机先进先出式注射装置设计研究

简要介绍柱塞式、螺杆往复式和螺杆柱塞式3种橡胶注射成型技术的特点以及先进先出注射原理。以先进先出原理设计的注射装置可优先注射先塑化的胶料,并且与胶料接触的金属表面具备良好的清洁功能,可有效避免胶料的早期硫化,提高产品质量。分别介绍了塑化缸-注射活塞集成式和带有喷嘴提升机构的2种先进先出注射装置的结构。     

橡胶注射成型机先进先出式注射装置设计研究

简要介绍柱塞式、螺杆往复式和螺杆柱塞式3种橡胶注射成型技术的特点以及先进先出注射原理。以先进先出原理设计的注射装置可优先注射先塑化的胶料,并且与胶料接触的金属表面具备良好的清洁功能,可有效避免胶料的早期硫化,提高产品质量。分别介绍了塑化缸－注射活塞集成式和带有喷嘴提升机构的2种先进先出注射装置的结构。     

橡胶注射成型技术

主要从橡胶注射成型设备和橡胶注射成型工艺两个方面叙述了橡胶注射成型技术的发展情况.并对橡胶注射成型机控制系统的发展作了简述.     

橡胶注射成型技术及其设备

介绍了橡胶注射成型的一些加工工艺技术的发展,以及国内外橡胶注射成型硫化机设备的发展状况,阐述了橡胶注射成型机的特点,分析了橡胶注射成型机的一些特有优点（塑化性能好、能耗低、成型过程自动化程度高等）.     

橡胶衬套注射模设计

叙述了汽车用橡胶衬套注射模结构特点及工作过程,分析了该产品的结构及要求,采用了硫化全过程自动控制及抽真空装置,保证了产品性能的稳定性和一致性。     

橡胶螺杆旋转注射成型技术及成型机的研究

对橡胶螺杆旋转注射成型技术及成型机进行了研究。通过对影响旋转注射压力、旋转注射能力和旋转注射温度有关因素的探讨,初步得出了橡胶螺杆注射成型技术及成型机旋转注射成型的基本规律。与传统橡胶注射成型技术和成型机相比,橡胶螺杆旋转注射成型技术和成型机具有塑化和注射同步进行、注射能力大、设备结构简单、生产效率高和产品质量好的特点。IIR密封套、轮胎胶囊和油田用螺旋泵定子氟橡胶泵衬的生产实践表明,本研制橡胶螺杆旋转注射成型技术和成型机的工艺是可行的,完全可以在橡胶制品,尤其是大型橡胶制品生产中应用。     

橡胶注射成型机液压控制系统

液压传动具有工作平稳、易于实现自动控制的优点.因此橡胶注射成型机采用液压传动作为动力源.本文着重介绍了3种不同的橡胶注射成型机液压控制系统的特点和工作原理.     

橡胶注射机直线式注射装置

由桂林橡胶机械厂申请的专利（专利号CN2855702,公开日期2007—01-10）“橡胶注射机直线式注射装置”,涉及的橡胶注射机直线式注射装置注射单元的轴线与注射缸的轴线为同一垂线。注射单元从上方插入注射缸,其顶部的止回阀外径与注射缸内径相同,二者为密封滑动配合,注射单元的尾部固定于挤出单元合模油缸上模,注射缸固定于合模油缸下模。注射单元将胶料挤入注射缸,胶料落人注射缸底部,后人缸的胶料堆积于先人缸的胶料上面。合模油缸合模时带动注射缸向上运动,注射单元插向注射缸底,止回阀防止胶料回流,注射缸内的胶料从注射孔压人模腔。该发明为橡胶注射机设备提供了一种结构简单、加工容易、成本低的配件,可保证注射缸内的胶料先进先出,避免胶料过硫化,使产品质量得到保证。     

纵论注射成型技术

以注射成型技术在橡胶行业的发展现状为依据,从工作原理、生产工艺、产品质量、生产效率等几个方面着手,对模压成型技术和注射成型技术进行了比较,阐述了注射成型技术的优越性。同时,针对推广注射成型技术遇到的困难,提出了注射成型技术在橡胶行业的推广过程中所需要解决的一系列问题。     

MuCell微发泡注塑成型技术应用

MuCell微发泡注塑成型技术的使用日趋普及,其制品主要集中在品质要求较高、材料较贵的产品上。近年来,选用微发泡注塑成型技术的中国企业数目快速增长,其应用领域也正在扩大。     

新型注射成型机

该文重点介绍了一种新型注射成型机,其创新之处在于可控制温度,能除去注射筒内的滞留胶。     

最佳自动化橡胶注射成型机

介绍了配置有Maplan控制系统PC5000touch的自动化橡胶注射成型机。其能在开机后很短时间内,达到规定的机器设定值,并且其整个工艺过程高度透明。     

橡胶注压成型机

介绍了宁波千普公司设计开发的橡胶注压成型机的合模机构、注压机构、液压传动系统、电控系统.对橡胶注压成型机所需要做的进一步发展和提高进行了简要的分析.     

一步法注射成型机

简述了注射成型法与模压成型法相比所具有的诸多优点，同时指出了传统注射成型方法所存在的问题。着重介绍了一步法注射成型技术及其设备的结构特点、工作原理及工作特性。     

新型注塑成型工艺

介绍了在传统注射成型工艺的基础上逐渐发展起来的几种新型注射成型工艺。气体辅助注射成型、多层共注成型和气体辅助多层共注成型、并对其进行了较详细的描述。     

Simulation of reactive injection molding

This paper deals with the computer simulation of those aspects of Reactive Injection Molding (RIM) dealing with the non-isothermal and transient flow of a chemically reacting mixture into a mold cavity, and the in situ polymerization (“curing”) which follows mold filling. Linear polyurethane systems were considered. The purpose of this simulation work is to investigate the effects of the operating, chemical, and rheological variables on the length and the stability of the RIM process, as well as the quality of the resulting product. Since the flowing fluid mixture is reactive, there is a need to know the thermal history of each of the flowing fluid particles. For this reason the “fountain” flow at the fluid-air interface is considered in a heuristic fashion.     

Process control of injection molding

This paper discusses the most important input parameters affecting the conventional injection-molding process and describes a closed-loop control system for determining the interaction between ten process inputs and three output parameters. The input parameters are: back pressure, holding pressure, injection time, open mold time, shot size, clamping pressure, injection pressure, screw speed, and boost cut-off. The output parameters studied are: part weight, maximum cavity pressure, and maximum mold deflection.     

The injection molding of thermosets

Current industry trends toward increasing automation, as well as increased flexibility in material selection have focused a strong spot light on thermoset injection molding. The growth of thermoset injection molding is reviewed comparatively with the technical history and growth of thermoplastic injection. The progress we see to date and the promise for the future in material characteristics and properties, mold design features, equipment features, changing concepts and new thoughts are discussed.     

Computer simulation of injection molding

The injection-molding process consists of three consecutive stages: filling, packing, and cooling. In order to obtain some insight into the phenomena involved in the process, and particularly in order to evaluate the moldability of certain resins and to predict the microstructure and properties of products molded therefrom, a number of workers have employed a variety of techniques based on mathematical simulation of the process. Mathematical simulation involves writing the relevant continuity, momentum, and energy equations governing the system, with appropriate boundary and initial conditions representing the prevailing conditions in the cavity and delivery channels. In order to obtain meaningful solutions to the above equations, detailed information is required regarding the thermodynamic, thermal, and rheological properties of the resin. Moreover, the prediction of the microstructure and ultimate properties of the molded article requires a knowledge of the morphological, crystallization, and orientation phenomena that take place under the influence of the thermo-mechanical history experienced by the resin. The complexity of the equations involved results in the utilization of a number of simplifying assumptions and the resort to computer simulation and numerical solutions of these equations. A variety of numerical schemes based on finite difference and finite element methods has been employed by various researchers.