玻/碳纤维混杂复合材料层合板的振动特性研究

为了获取玻/碳纤维混杂复合材料层合板的振动特性,以玻/碳纤维混杂复合材料层合板为研究对象,基于有限元分析软件ANSYS Workbench分析了夹芯混杂、层间混杂两种混杂方式下的复合材料层合板的振动特性,得到了层合板的混杂类型、铺设厚度、长宽比、铺设角度对玻/碳纤维混杂复合材料层合板固有频率的影响规律.结果表明:夹芯混...     

不同增强方式下泡沫夹芯复合材料三点弯曲性能研究

研究了缝合及加强筋增强方式下泡沫夹芯复合材料的三点弯曲性能。采用万能试验机分别进行了缝合与未缝合碳纤维、玻璃纤维、玻碳混杂纤维泡沫夹芯复合材料的三点弯曲实验,分别得出各自的载荷-挠度曲线,再引入加强筋的方式进一步研究缝合碳纤维泡沫夹芯复合材料的弯曲性能。结果表明,玻碳混杂纤维泡沫夹芯复合材料较玻璃纤维泡沫夹心复合材料性能有所提升;引入加强筋会使缝合碳纤维泡沫夹芯复合材料的弯曲强度从17.79 MPa增大到37.47 MPa,且随着加强筋数量增多,缝合碳纤维泡沫夹芯复合材料的弯曲性能得到提升;在加强筋数量相同（2根）的情况下,加强筋平行铺放时弯曲性能最好,弯曲强度达到46.96 MPa,20 °交叉铺放时次之,十字铺放时最差。     

CF/GF层间混杂增强缝合泡沫夹芯复合材料低速冲击性能试验研究

研究了碳纤维(CF)与玻璃纤维(GF)层间混杂增强环氧树脂缝合泡沫夹芯复合材料的冲击性能。采用落锤冲击试验机对缝合碳纤维、玻璃纤维和玻碳层间混杂纤维泡沫夹芯复合材料板进行了冲击试验,得出了锤头接触力和位移随时间变化的曲线。通过显微拍照和超声波检测技术对冲击后的复合材料板进行了损伤检测,得出夹芯复合材料板内外部损伤情况。结果表明:碳纤维泡沫夹芯复合材料板的锤头最大冲击力最大,而接触时间最短;玻璃纤维的锤头最大冲击力最小,而接触时间最长;玻碳混杂纤维最大冲击力和接触时间居中。碳纤维冲击后表现为脆性破坏,玻璃纤维的加入改善了碳纤维的韧性。     

长玻纤增强ASA/PVC夹芯复合板材的制备及性能

采用在线混配法制备了长玻纤增强ASA复合片材和夹芯复合板材。通过实验制备了不同玻纤含量长玻纤复合片材时,双螺杆挤出机的主机转速、喂料转速及纤维束数。研究了制备工艺对片材性能的影响,采用微观电镜分析了接枝料及玻纤含量对片材力学性能的影响,并通过残余玻纤长度的测量分析了片材力学性能与玻纤长度之间的关系。通过工艺优化,将长玻纤增强ASA片材热覆于PVC发泡板的表面,快速冷压成型,制备了长玻纤增强ASA/PVC夹芯复合板材,得到了不同面层对复合板材弯曲、冲击等力学性能的影响。结果表明,当长玻纤含量为20%时,制备的夹芯复合板材的性能最佳,其弯曲强度、弯曲模量均达到Ⅱ类强度实芯建筑模板用木塑复合板的标准。     

怎样画粉彩

一、粉彩的由来和特点粉彩创始于清康熙年间,是在五彩(古彩)基础上发展起来的,至今已有两、三百年的历史。雍正时期粉彩最盛行,最成熟。用粉彩绘出来的花鸟、人物、山水等,都比五彩更精确、真实,色彩调和,画面工整,粉润雅致。粉彩在色彩上看起来有粉润效果。雍正时期的粉彩,大部分颜色都调入玻白,如洋红入玻白为宫粉(粉红色);广翠入玻白为淡翠(淡兰色);锡黄入玻白为淡黄;净大绿入玻白为翡翠;净苦绿入玻白为松绿。像这些颜色调粉运用,故而称之为粉彩。同时在描绘填色的操作上,如花卉中的花朵,人物中的衣服,海水中的浪花,山水中的夹叶以及粉白墙头,都     

增强塑料浴缸

法国Carron公司生产的Andrea牌浴缸,是用5毫米厚的聚丙烯板模制的,热成型后再用玻玏纤维增强聚酯加强,刚度很大,抗冲击性能良好。这种浴缸的优点还有:外表光亮、平滑;聚丙烯板是着色的,夹在玻璃     

夹层玻璃用硅橡胶圈的研制

夹层安全玻璃近年来在国外建筑和汽年行业中已有广泛的应用。我国目前由国外引进了近十条夹层璃玻生产线,主要生产汽车风挡玻璃这种夹层玻璃中间夹一塑料(聚乙烯醇缩丁醛)胶片制成,生产时需要使用异型截面的硅橡胶圈,由国外购买这类胶圈要花费不少外汇。     

飞天艺术玻璃公司

“飞天艺玻”是一家集设计、开发、生产工艺玻璃于一体的玻璃深加工专业型品牌企业。地处工艺玻璃殿堂一南国之都广州市，距广州机场仅10几分钟车程。厂房面积二万余平方米，工厂员工300余人。“飞天艺玻”有电脑刻纸机、电脑车花机、电脑水切割台、夹丝夹胶机、数控电脑大斜边机、磨边机、异型机等数十台等世界一流的专业加工设备和一批优秀的开发设计师团队。     

玻璃管生产工艺

第一讲:概述 玻璃管生产已有很久的历史,最初的生产方式是采用手工拉制。一九一七年美国首先发明了水平机械拉管机,从此以后,玻璃管的生产逐步由手工转入机械化。五十年代以后,各先进国家广泛采用了机械拉制玻璃管的设备;在品种方面,不仅生产直管,而且还生产各种异型玻管,如蛇型管、扁管、三角毛细管以及夹白瓷的温度计毛细管等。与此同时,拉管设     

上升道结构对高铅玻璃管条纹的影响

上升道结构对高铅玻璃管条纹的影响陈永（石家庄宝石电子集团公司玻管厂０５００４１）电子工业用的高铅玻璃管应具备耐高温、高频、高绝缘和防Ｘ射线等性质。条纹是玻璃管生产中常见的缺陷，主要是由于化学组成不均匀造成的，即玻璃主体内存在异类玻璃夹杂物，因为两者化...     

玻璃钢管的高速旋转模塑成型工艺研究

介绍了一种高速旋转模塑工艺成型纤维增强树脂基复合材料制品新技术，研究了该工艺的工艺方法及成型原理。并以成型玻璃钢管为例进行实验研究，分析了成型过程中所选转速对制品质量的影响及制品成型的时间控制问题。结果表明：该方法通过增强树脂浸润纤维的驱动力可以提高制品质量和制品的生产效率。     

安全玻璃夹层用PVB膜片生产工艺配方的设计

采用胶片级聚乙烯醇缩丁醛(PVB)树脂为基础树脂，选用了不同的增塑剂和助剂，制成了夹层玻璃所用的膜片，分析了工艺流程中各原材料对产品质量的影响。实验表明，PVB树脂颗粒须粒径均匀，不同用途的夹层玻璃需选用不同的增塑剂，同时进行相应生产工艺的调整，才能实现稳定连续的生产。     

有机光致变色夹胶玻璃

首先制备了螺旋吡喃类有机光致变色粉,并用该变色粉合成了PVB光致变色胶片和有机光致变色夹胶玻璃样品。测量了该有机光致变色夹胶玻璃样品在光照3min前后的可见光透光率变化情况,并推算其遮阳系数及隔热效果等。     

客户接收概率在玻纤制品质量管理中的应用

为了在玻璃纤维生产中提高发现问题的能力,在玻璃纤维制品中应用了接收质量限AQL值、抽样检验、二项式计算接收、概率等原理,将玻纤制品的检测数据转化成可以量化且直观的百分比数值,用来判断客户的接收情况,从而达到降低质量问题发生的概率,起到玻纤制品生产中问题产生的预警作用。     

Influence of additives on the crystallization and thermal conductivity of container glass cullet for foamed glass preparation

Foamed glass preparation is a complex combination of reactions, greatly influenced by the composition of the used glass and often hindered by simultaneous crystallization. The crystallization phenomenon is undesirable in foamed glass production since it decreases the quality of the final product. In this work the influence of different types of additives (foaming agents, flux agents, crystallization inhibitors and nucleating agent) on the crystallization of waste container glass and properties of the sintered samples (density and thermal conductivity) was studied. Results of our study confirmed partial crystallization during sintering stage. We found that waste container glass manifests complex crystallization with the formation of four main crystalline phases, which can be inhibited with the addition of fluxing agents (B₂O₃ and borax). Moreover, here we show that prevention of the crystallization can lead to a significant decrease of the thermal conductivity.     

Improvement of the Float-Process Technology

The problems of production of float glass are discussed. The possibilities of shortening the duration of conversion from one type of glass to another on the same production lines, of improving the optical parameters of float glass etc. are demonstrated. The developed techniques make it possible to improved the quality of glass to increase the production volume and expand the product range.     

The Effect of Glass Transition Temperature on the Procedure of Microwave–Freeze Drying of Mushrooms (Agaricus bisporus)

Freeze drying (FD) yields the best quality of dried mushroom but at the cost of a long drying time and high overall cost. Air drying (AD) gives an unacceptably poor quality product. To achieve faster drying along with a high-quality product, a microwave–freeze drying (MFD) technique was developed to dry mushrooms. The relationship between dried mushroom quality and the glass transition temperature during the MFD process was studied to optimize the MFD process. According to the change tendency of the glass transition temperature of mushroom during MFD, a step-down microwave loading scheme for the MFD process was developed to obtain good product quality.     

热辐射对夹层玻璃工艺的影响

随着建筑玻璃幕墙不断的推广使用,对其安全性要求也越来越高。近年来建筑玻璃幕墙使用干法夹层玻璃复合而成的玻璃制品越来越多,但是干法夹层玻璃在生产过程中存在一些影响夹层玻璃寿命的因素,其中最为致命的就是夹层气泡。从玻璃生产受热角度解析干法夹层生产过程中的工艺控制要点,以期对生产企业有所帮助。     

电磁屏蔽玻璃的生产和质量控制

电磁屏蔽玻璃的制作是采用夹层玻璃的工艺完成的.各种材料的清洗、蒸压时的温度制度、金属丝网的化学浸镀等都会造成产品质量问题.只有严格挑选材料、严格工艺制度,从细微处入手,才能逐步提高产品的成品率.     

ON THE INFLUENCE OF SEVERE INTERNAL DIFFUSIONAL LIMITATIONS ON OPTIMUM TEMPERATURE OPERATIONS CRITERION AND POLICIES IN DEACTIVATING FIXED-BED AND BATCH REACTORS

During the forming of glass articles by a variety of different processes, it is important to be able to accurately measure the temperature of the glass. Also, to be practical for production applications, the temperature measuring technique must not interfere with the process or disturb the product. Only infrared radiation pyrometry is capable of meeting these requirements.

Narrow-band radiation pyrometers are non-contacting sensors that (depending on the operating wavelength) either measure the surface temperature or some weighted average of the surface and internal temperatures of semi-transparent glass objects without significantly affecting the product or its heat exchange with the environment. When attempting pyrometer temperature measurements on glass, it must be recognized that the incident radiation originates not only from the surface, but also from the interior which may be at a different temperature. However, a knowledge of the directional spectral volume emissive power of the glass object can be used to determine a "best" operating wavelength for the desired results and/or to help interpret indicated temperature measurements.

A sophisticated mathematical model of coupled radiation and conduction heat transfer in glass has been formulated to calculate the apparent temperature indicated by a hypothetical narrow-band infrared pyrometer receiving radiation emitted by glass plates of specified thickness and non-uniform temperature distribution. These results are presented for a wide range of operating wavelengths, covering the three distinct regions of the transmission spectrum of a typical soda-lime-silica glass.