大型玻璃钢模具常见问题分析

本文分析了大犁玻璃钢模具在制作过程中经常遇到的问题,包括:钢架模具表面代木层开裂、木架模具表面代木层开裂、阳模表面亮光处理多余、阴模拐角有气泡、阴模表面玻璃钢层较厚、阴模玻璃钢与钢架硬连接处变形、阴模钢架无热膨胀胀缝、阴模导流管接头过多等.并提出相应的解决方法.     

美国研制成功玻璃钢专用陶瓷填料

最近,美国研制成功一种玻璃钢专用陶瓷填料,用于玻璃钢模具制作及船体制造,获得成功。据技术测试,添加了这种陶瓷填料的树脂,其硬度比胶衣或玻璃纤维层积的硬度高出一倍多。将这种陶瓷填料用于制作玻璃钢模具,模具在脱模或受硬物撞击时,表面不会产生裂纹,可减少修补,延长模具寿命,同时可防止方格布纹印到模具表面,提高产品质量,又能防止模具胶     

高级玻璃钢模具的表面处理和保养

高级玻璃钢模具的表面处理和保养袁耀华邹永国（江苏武进中袁特种玻璃钢模具厂）要生产高档次的玻璃钢制品，必须要有好的玻璃钢模具，生产高档次的玻璃钢模具，不仅要用高档次的原辅材料，还要有严格的制作工艺。现在市场上从国外进口的研磨抛光材料和脱模材料很多，不少...     

组合式无机玻璃钢通风管道模具的研究与应用

根据多年的生产经验及研究,对玻璃钢通风管道模具的制作工艺要点(如木型的处理、模具的糊制及表面处理)进行了较详细的分析介绍,可为通风管道制造高质量的玻璃钢产品提供一些参考。     

玻璃钢模具制造

制造一个好的玻璃钢模具,是为了获得完美的玻璃钢制品。选择合适的材料,对制造品质优良的玻璃钢模具是非常重要的。产品模具要考虑树脂固化期间放热而引起的温度上升,所以,制做玻璃钢模具时要选用耐热性能好,具有良好刚性的树脂。更重要的是,玻璃钢模具胶衣,应具有某些特殊品质,以产生高硬度的表面和耐热性。有一点应引起足够的注意,选用高硬度模具胶衣,通常脆性大。所以,应特别注意在玻璃钢产品完工脱模时,不能使模具有较大变形。脱模时引起的模具变形,会导致模具胶衣出现裂纹。     

玻璃钢模具制作技术

<正> 目前,国内玻璃钢市场,尤其是手糊玻璃钢制品的市场竞争激烈。归根到底,其主要是玻璃钢质量的竞争。影响玻璃钢制品质量的因素是多方面的,但其中一个重要因素是模具的制作质量。一、玻璃钢模具用材料 (1) 胶衣树脂一般说来每付模具要生产几十件甚至几百件制品。我们知道FRP固化体系发生反应会放出大量热量,其表面     

玻璃钢模具及制品抛光材料的研究

本文对玻璃钢模具及制品用的抛光材料进行了系统的研究,讨论了抛光材料中磨料性能及辅助剂对抛光效果的影响。根据研究结果,合成了一种使用方便、价格低廉的玻璃钢模具及制品的抛光材料,可使表面光泽度达100％。     

玻璃钢表面裂纹的探讨

玻璃钢表面裂纹的探讨钱传文（南京玻璃钢总厂２１００１１）为了保护玻璃钢制品的表面，改善制品的外观、耐气候性及耐水性等，常需在玻璃钢制品的表面涂上一层胶衣。不饱和聚酯胶衣具有高弹性、高冲击强度、耐气候性、吸水性低等优点；模具用胶衣树脂具有较好的耐磨性和...     

玻璃钢模具的维护和保养

本文简单介绍了玻璃钢模具的维护和保养,以提高产品质量,延长模具的使用寿命,降低其使用成本。中国自1958年出现了玻璃钢以后,几乎与此同时,就有了玻璃钢模具。当时玻璃钢在民品中应用较少,所以对玻璃钢模具的外观质量要求不是特别高。随着玻璃钢在民品领域的不断应用,最近几年玻璃钢业界通过技术引进与吸收,使玻璃钢模具的制造水平不断提高。但是有了高质量的玻璃钢模具,还必须重视其维护和保养,才能提高模具的使用寿命,降低模具的使用成本。     

玻璃钢模具的修补

玻璃钢模具在使用久了或因脱模不小心而致使模具局部损坏时可进行修补。修补方法如下: 1.将模具损坏部位表面的脱模剂、蜡等清理干净。     

FRP锚钉锚固长度对FRP加固混凝土构件拉拔性能影响的试验研究

FRP锚钉是能有效阻止FRP加固混凝土构件界面剥离的前沿方法.为了测定FRP锚钉的不同锚固长度对FRP加固混凝土构件粘结性能的影响,采用拉拔试验,参照ACI规范的试验方法,测定了不同锚固长度下FRP加固混凝土构件的拉拔荷载.试验用不安装锚钉的控制试件和安装了15 mm、30 mm、45 mm三组FRP锚钉的试验试件,结果发现,锚固长度不同,FRP加固混凝土构件的破坏模式也各不相同,主要表现为混凝土内部浅层剥离、混凝土锥形破坏、混凝土锥形破坏联合锚钉部分拉拔破坏、混凝土浅层剥离联合锚钉断裂破坏以及FRP加固层内部浅层剥离联合部分混凝土浅层剥离破坏;FRP锚钉的锚固长度越长,加固试件的粘结性能越好;混凝土圆柱体抗压强度设计为30 MPa时,FRP锚钉的锚固长度应不得小于30 mm.试验结论可以为FRP锚钉的设计制作提供参考.     

玻璃钢筋增强水泥基复合材料的试验研究

本文采用对裸玻璃钢筋进行表面处理的方法提高水泥对玻璃钢筋的握裹力；研究了挤拉玻璃钢筋增强水泥基复合材料的结合性能，制备出抗压强度49.6MPa、抗折强度25．8MPa的优质玻璃钢筋增强水泥基复合材料；初步探讨了用玻璃钢筋增强水泥的可行性。     

基于RBF的玻璃钢天线罩逆向工程曲面重构

研究目的是通过人工神经网络方法重构玻璃钢天线罩曲面。径向基函数(RBF)神经网络具有很强的非线性逼近能力,根据给定的天线罩外表面数据及采集的天线罩内表面数据,采用RBF神经网络对玻璃钢天线罩进行逆向工程曲面重构。典型工程实例的计算结果证明,该方法的拟合、重构精度高,并且训练速度快,具有很高的实用推广价值。     

RC结构表层嵌入FRP加固技术研究概述

纤维增强聚合物在混凝土结构加固中应用的越来越多,本文首先介绍了纤维增强聚合物(Fiber Reinforced Polymer,简称FRP)的性能,然后分别从混凝土结构外贴和表层嵌粘FRP应用实践、FRP与混凝土粘结性能、单一和混杂FRP加固混凝土结构性能和加固构件非线性有限元分析等方面,说明了目前混凝土结构嵌粘FRP的研究现状,混杂FRP加固技术既经济又有效,具有较大的研究意义。     

Surface roughness of fiber reinforced plastic laminates fabricated using rubber pressure molding technique

The rubber pressure molding (RPM) technique for fabricating fiber reinforced plastic (FRP) laminates is a new development in manufacturing technology of FRP composites. The technique is based on the matching die set, where the die is made of hard metal like steel and the punch from the flexible rubber‐like material, natural rubber (NR). A split steel die and rubber punch are designed and fabricated to prepare the FRP product. The same split die is also used to cast the rubber punch. The use of flexible rubber punch applies hydrostatic pressure on the surface of the product. The rubber used to make the punch for pressing the component during curing process contains carbon black as filler material. The present study was carried out to investigate the effect of carbon black loading on the surface roughness of the FRP components produced by RPM technique. Natural rubber with different loading of carbon black (0 to 120 phr) was used for making the punch to fabricate the laminates through RPM technique. A number of FRP laminates with polyester resin and glass fiber were prepared to perform the experimentation. It was observed that as the loading of carbon black in rubber punch is increased from 0 to 120 phr, there is a significant decrease in the surface roughness of laminates. The surface roughness values of FRP laminates are correlated with a proposed model. POLYM. COMPOS. 27:504–512, 2006. © 2006 Society of Plastics Engineers     

如何提高手糊玻璃钢制品的表面质量

本文对影响手糊玻璃钢产品表面质量的因素进行了探讨,并提出了相应的解决办法。     

玻璃钢细长管件产品的模具设计

玻璃钢材料目前正在各领域得到广泛应用,玻璃钢产品多以手糊成型,由此它对模具的要求很高。为生产某一特别细长且内外表面要求很光洁的管件产品,笔者采用了表面光洁的细长模芯加以车加工外表面的方法,保证产品的精确成型;同时设计了与专用脱模机配套的脱模环,保证产品的顺利脱模,此套模具通过一定批量的实际生产,各工序的使用效果均很好,所以在此做一简介,以供同行在类似玻璃钢产品模具设计时参考。     

Surface modification with acrylic polyampholytes 1, adsorption of acrylic polyampholytes on fiberglass reinforced plastics,and characterization of the polymer adsorbed surfaces

The adsorption of acrylic polyampholytes on fiberglass reinforced plastics (FRP) was investigated using random copolymers derived from (dimethylamino)ethyl methacrylate (DM), methacrylic acid, and t‐butyl methacrylate (t‐BMA). The effect of the copolymer structure changes on the adsorption and the interactions between the copolymers and the surface were assessed using ζ‐potential and contact angle measurements, NMR, and ESCA. The copolymer having the composition of 58 mol % pDM, 38 mol % pMMA, and 4 mol % pt‐BMA was adsorbed on the FRP surface at pH 7, and it formed the highest hydrophilic surface among the tested copolymers. An analysis by use of atomic force microscope revealed that the copolymer afforded a uniform 4–6 nm thick coverage on the FRP. We concluded that the interactions between the copolymer's cationic sites and the anionic FRP surface are important as well as the hydrophobic interaction for adsorption. Furthermore, it is suggested that the hydrophilicity of the copolymer's adsorbed surfaces is related to the density of the copolymer's anionic sites. These results indicate that the ampholytic structure of the polymers would be essential for the surface modification on the FRP. The effect of functional groups of surfaces on the acrylate adsorption was also assessed using surface plasmon resonance. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 4454–4461, 2006     

Adhesively bonded composite tubular joints: Review

The aim of this review article is to examine solutions and challenges associated with adhesively bonded fibre reinforced polymer (FRP) pipe sections. FRP materials have been used in piping systems for more than 40 years. Higher specific mechanical properties and corrosion resistance of FRP makes it a potential candidate for replacing metallic piping structures. Another advantage of FRP structures is the large number of design variables available. Despite the advantages associated with FRP structures, their application is still limited, partly due to unsatisfactory methods for joining composite subcomponents and inadequate knowledge of failure mechanisms under different loading conditions. Adhesively bonded joints are attractive for many applications, since they offer integrated sealing and minimal part count and do not require pipe extremities with complex geometries such as threads or bell and spigot configurations. Normally, an adhesive joint results in more uniform stress distribution, undamaged fibre architecture, and smooth surface contours. In the present article, a comprehensive review of various joining techniques for FRP piping through adhesive bonding is presented and damage mechanisms for different loading conditions are examined.     

聚四氟乙烯/玻璃纤维胶带在风电叶片制造过程中的应用分析

研究了聚四氟乙烯/玻璃纤维胶带作为脱模介质对玻璃钢表面的影响以及对风电叶片制造成本的影响。从接触角、拉剪性能和对不同涂层的附着力这三大方面,对比了分别使用聚四氟乙烯/玻璃纤维胶带、尼龙脱模布、光滑和砂纸打磨这四种方式获得的玻璃钢表面性能。研究结果表明:使用聚四氟乙烯/玻璃纤维胶带获得的玻璃钢表面润湿性一般;玻璃钢使用聚四氟乙烯/玻璃纤维胶带脱模可获得与使用脱模布相当的拉剪性能;使用聚四氟乙烯/玻璃纤维胶带获得的玻璃钢表面涂装附着力与其他方式持平。经济性分析表明国产聚四氟乙烯/玻璃纤维胶带在模具上的应用有望降低风电叶片的制造成本。