经济实用的热固成型工艺改革

由于采用冷流道、浇口切刀和传感器,生产效率迅速提高。这一工艺改革使传统的热固性塑料注射成型消除诸多缺陷,变得经济实用。　　注射成型是大批量热固性塑料制品的主要生产工艺。虽然大多数人都认为注射工艺更多用于热塑性塑料,但每年注射生产的热固性制品达数亿件。由于工艺装备所带来的成本效率好处,这个数字还会增大。　　大凡熟悉热固性塑料注射成型的工程师都知道,这种工艺仍具有潜力,可以获得更高的制品产出率,可以设计生产更为复杂的制品。但是,不可思议的是,这些工程师有时仍倾向于使用热塑性材料(尽管它们比同体积的相当性能的热…     

热固性酚醛塑料注射成型技术

本文论述了热固性塑料注射成型原理、注塑料要求、注射机要求、模具要求以及注射成型工艺、制品缺陷及原因分析等。     

FX—801增强热固注射料的研究

一、概述 热固性塑料注射成型是六十年代初出现的一种新工艺。热固性塑料注射成型的优点是生产效率高,成本低,易于实现自动化,制品质量均匀。是热固性塑料成型工艺中的一次革命。在国外已成为热固性塑料成型的主要工艺之一。 热固性塑料注射成型的发展是从注射成型设备的研究开始的,1960年日本首先制成了螺杆式热固性塑料注射机,1961年美国     

1996年江苏省塑料工业技术进展

描述了江苏省塑料行业的概貌，介绍了江苏省塑料行业各领域（如热塑性塑料、热固性塑料、降解塑料、成型加工、塑料制品、塑料助剂等）取得的技术成果、研究进展和生产装置水平。     

热固性塑料注射成型(一)基本热固性塑料注射成型

论述了热固性塑料注射成型的方法、工艺、设备和模具设计方面的问题     

热固性塑料注塑成型综论

论述了基本热固性塑料注塑、无流道、注压成型、反应注射、液体注射、模塑料注射成型等的方法,特点,工艺,设备和模具设计方面的问题     

热固性塑料注射成型 (二)无流道热固性塑料注射成型

论述了无流道热固性塑料注射成型的方法、工艺、设备和模具设计方面的问题。     

热固性塑料成型模具的设计与制造

第一部分简述了塑料和热固性塑料之定义及其使用性能、用途、成型工艺参数；介绍了压缩成型模具的特点和六种典型结构；第二部分介绍注射成型、冷流道注射成型；第三部分介绍注、压成型、冷流道注、压成型模具的特点和典型结构。本文对各部分介绍的模具设计、制造要点进行了说明。     

热固性塑料成型模具的设计与制造（三）

第一部分简述了塑料和热固性塑料之定义及其使用性能、用途、成型工艺参数；介绍了压缩成型模具的特点和六种典型结构；第二部分介绍注射成型、冷流道注射成型；第三部分介绍注、压成型、冷流道注、压成型模具的特点和典型结构。本文对各部分介绍的模具设计、制造要点进行了说明。     

热固性塑料成型模具的设计与制造（二）

第一部分简述了塑料和热固性塑料之定义及其使用性能、用途、成型工艺参数，介绍了压缩成型模具的特点和六种典型结构；第二部分介绍注射成型、冷流道注射成型；第三部分介绍注、压成型、冷流道注、压成型模具的特点和典型结构。本文对各部分介绍的模具设计、制造要点进行了说明。     

注塑机液压系统的使用维护

注塑机是利用塑料成型模具将热塑性或热固性塑料制成各种形状塑料制品的主要成型设备;注塑机液压控制是注塑机械控制技术重要的组成部分。根据注塑机液压系统油缸的结构特点,介绍了注塑机液压系统油缸的维护,塑料注塑机液压系统元件的拆装;研究了注塑机液压系统故障诊断的方法;提出了注塑机液压系统泄漏、振动噪声以及发热等故障处理方法。     

邻苯二甲酸二烯丙酯精密注塑

利用邻苯二甲酸二烯丙酯(DAP)添加玻璃纤维与无机填料等混炼而成的粒状热固性塑料,注塑形状精度要求高、有铜质嵌件的电子零件,针对其注塑过程中所出现的工艺问题进行分析,并提出其注塑-压缩的精密注塑解决方法。     

三角架BMC热固性塑料柱塞式压注模具结构设计

针对塑件热固性塑料压注成型需要,设计了一种1模2腔布局的两板压注模具;压注浇口采用边沿式浇口,圆柱压柱进行压注,成型压注压力控制在7～32 MPa之间;压注室加热采用电加热方式加热,成型件采用管道合成导热油FYD350进行加热,上模镶件的温度控制在153～156 ℃之间,下模镶件的温度控制在148～151 ℃之间;运用3种排气方式进行腔内排气;模具中,针对侧孔特征采用3个侧抽芯滑块机构来脱模,采用双边插杆先复位机构来将顶出机构先复位。结果表明,模具结构布局合理,机构设计简单,可做同类塑件压注成型的设计参考。     

Molding of PBO fabric reinforced thermoplastic composite to achieve high fiber volume fraction

In fiber‐reinforced plastic materials, the fiber volume fraction is one of the most important parameters, and it strongly influences the composite properties. However, it is hard to improve impregnation and the fiber volume fraction in fiber‐reinforced thermoplastics because thermoplastic resins have high melt viscosities. This study explored a reformative solution impregnation method for molding fabric‐reinforced thermoplastic composites with a high fiber volume fraction. The fiber volume fraction was significantly increased, to 60%, which is equal to that of fiber‐reinforced thermosetting plastic materials. A comparison indicated that a fiber‐reinforced thermoplastic and a fiber‐reinforced thermosetting plastic with the same reinforcing fiber had similar tensile properties and that the proposed molding method is effective in thermoplastic composite manufacture. POLYM. COMPOS., 34:953–958, 2013. © 2013 Society of Plastics Engineers     

Rheomolding: A New Process to Mold Polymeric Materials

Polymer processing is an engineering field which deals with the conversion of synthetic high polymers into shaped articles ready for use. Impressive developments in the field of polymer processing in the last 20 years or so were precicipitated by the need to process plastic materials with an ever-increasing rate of production within stringent quality requirements. One of the most interesting methods for shaping plastic products is molding which involved all the possible ways for stuffing molds with thermoplastic or thermosetting polymers. Injection molding, compression molding, and transfer molding have now become some of today's routine approaches to plastics shaping.     

The behavior of thermosetting compounds in injection molding cavities

The thermo-mechanical history of thermosetting compounds in injection molding cavities influences the ultimate properties of molded articles and affects both moldability and the productivity of the process. Mathematical modeling is an attractive approach for obtaining information regarding the thermo-mechanical history of the compound in the cavity. In order to obtain useful mathematical models of the thermoset injection molding process, it is necessary to have information regarding the kinetics and heats of reaction during cure; the rheological, thermal, and PVT properties of the thermosetting compound; and the variation of these properties with operating variables and the degree of cure. The paper outlines a model of the thermoset injection molding process in simple rectangular or semi-circular cavities. Methods are described for the experimental determination of the various physical and chemical properties of thermosets, which are required for modeling purposes. The results obtained in conjunction with the characterization of an epoxy system are illustrated. Finally, the paper demonstrates the results of mathematical modeling of the injection molding process for a commercial epoxy molding compound in a semi-circular cavity, and shows that reasonable agreement is obtained between model predictions and experimental data.     

Plunger-Type Injection Molding Machines for Processing Thermosetting Polyester Compounds

After first being introduced at the International Plastics Show, Interplas, in London in 1961, plunger-type injection molding machines for thermosetting polyester molding compounds are today gaining growing acceptance in a field long dominated by compression and transfer types of equipment. The scope of this paper will be to present the latest developments occurring in plunger-type injection.     

一种单腔双色多功能注塑模具设计

介绍了一种特殊的单色、双色集成式家族两板注射模具。模具的布局为1模2腔，其中的一个单色模腔用于塑件的单色注射成型，另一个单腔双色模腔用于塑件的双色注射成型。单腔双色模腔只用一个模腔即能实现塑件的双色注射成型，其功能实现的方式为：在单色模腔的基础上，通过改变型腔镶件的形状及位置、以及第二胶浇口成型件的位置，达到单腔进行双色注射成型的目的。结合浇注系统的改造，模具能实现5种注射成型功能，分别为：单色塑件单腔注射功能、单色塑件双腔注射功能、单腔双色注射功能、单色+双色家族式注射功能，以及单模中注射两种不同颜色的同款塑件。模具结构新颖，简单实用，能有效降低多要求注射成型塑件的模具制造成本，有较好的设计参考价值。