水旋式喷漆室烘干系统的改造

1　前　言水旋式喷漆室是常用的涂装设备,在连续生产的涂装线上,工件在喷漆室喷漆后再进入配套的烘箱中烘干。而在间歇生产线中,由于是单件或小批量生产,一般不专设烘箱,通常从喷漆室顶部送入热风进行烘干或采用自然干燥,漆膜质量均不理想。晨光集团公司有一台有效尺寸为15.0ｍ×5.2ｍ×3.6ｍ的大型水旋式喷漆室,用于大型改装车和大型机械的涂装。该喷漆室附有空调系统,系统内的蒸汽换热器可将空气加热后送入喷漆室进行工件的烘干。由于热风不能循环,从顶部进入喷漆室后随即从底部排出,热能浪费极大,而且空调系统内的送风机功率很大,烘干时…     

Ω型静电喷漆室的防火设计与措施

随着人民生活水平的不断提高,市场产品的日趋竞争激烈,人们对产品的外观要求也越来越高。目前涂装行业已较广泛地应用静电喷漆这一先进的涂装技术来提高产品的外观质量。静电喷漆生产线普遍采用的形式有通过式(旋杯式)静电喷漆室和Ω型(圆盘式)静电喷漆室。实践经验证明,后者比前者有更多的优点。 1.喷枪容易操作由于工件在Ω型静电喷漆室运动时,不仅围绕圆盘周转运动,而且工件本身也自转,加上圆盘连续均匀作上下往复运动。因此,一支喷枪就能完成形状较复杂的工件喷漆工作,操作调整比较容易。而通过式静电喷漆室往往需要数支喷枪同时工作,操作调整比较麻烦。 2.油漆雾化能力强Ω型静电喷漆室的圆盘直径通常比通过式的旋杯直径大得多,转速高,     

移动喷漆室的设计应用

根据机床工件的特点，提出了移动喷漆室的概念．对固定式和移动式喷漆室2种方案进行了对比分析，阐述了移动喷漆室的工艺特点及设计思路，并开发了移动喷漆室的系列产品，在一些大型机床厂应用效果良好．     

干式喷漆室的改良及应用

干式喷漆室具有结构简单、设备一次性投资少、不需要专门的废水处理设备、能耗小、 运行费用低等优点,在很多行业得到应用。但是干式喷涂室的过滤材料容易积漆堵塞,如果 不及时清理会影响除漆雾效果,污染环境,从而限制了干式喷漆室的推广。我们在传统干式喷漆室的基础上,增加了一套水喷淋除漆雾装置,除漆雾效果显著提高,应 用在手扶电梯和工程机械上,均得到用户的充分肯定。1 干式喷漆室的结构特点改良型干式喷漆室见图1。 1.1 喷漆室喷漆室由室体、土建基础、平板车、路轨、玻璃纤维棉过滤装置等组成,挖掘机部件属于大 型工件,采…     

水旋式喷漆室设计方案简介

简要介绍了某轿车车身涂装线水旋式喷漆室的设计方案。该喷漆室设备地面零标高以上，无基础特构；水盆下增设滤水器提高了气水分离率；喷漆室底部即为循环水池，节省了占地空间。     

采用点云切片技术的喷漆机器人轨迹生成

提出了一种直接生成喷漆机器人运行轨迹的方法.该方法首先扫描待喷涂工件的表面以获取工件的点云数据信息,然后对点云数据进行切片处理,估算采样点的法矢量,最后采样点沿其法矢量偏置喷枪到工件的距离,得到喷漆机器人的喷枪轨迹.该方法将点云切片技术运用到喷漆机器人的轨迹规划,能准确地控制喷枪的运行位置、方向以及喷枪与喷涂工件表面之间的距离,提高了喷涂质量和效率.     

面向机床涂装的分区式喷漆室控制系统设计与实现

为了满足机床涂装需要,采用分区喷漆室涂装模式,基于PLC和触摸屏开发了现场控制系统.通过实现喷漆室的分区喷涂模式,降低了大型喷漆室的运行能耗.     

液压升降转盘式静电喷漆流水线

静电喷漆是一种利用高压静电场进行喷漆的技术。静电喷漆法优点是能大幅度节约涂料,减少公害,改善作业环境,提高劳动生产率,节省动力,质量好等等。我厂早在1964年就首先在国内试制成功并采用了旋杯式静电喷漆工艺。十几年来的使用经验证明,这种自动喷漆方式仍然有许多不足之处: 1.漆吐出量小,较大的工件须采用多     

机床涂装工艺浅述

我国现阶段机床产品的涂装工艺仍以小批量、手工为主,随着机床零部件质量的提高以及规模化生产,原有机床涂装方式已不适合现代机床工业的生产.通过对机床产品特性的分析和方案比较,提出了机床产品涂装工艺设计和平面布置,并介绍了主要的涂装设备:水旋喷漆室、油漆烘干室、多功能喷涂打磨室.通过对机床涂装工艺合理的设计,使得工件可以按产品特性组织批量生产.     

平流式大型喷涂漆室的研究与实际应用的可行性

大型喷漆室主要用于汽车,飞机、机车车辆及大型机床的喷涂作业。国内外对喷漆室的除雾方法与形式的研究比较多,较常用的有水帘式、水旋式、文丘里式、旋风式,自激式等各形式,常用的除雾方法则采用水幕(或油幕)过滤喷雾过滤,干式过滤等。但是对空气的对流形式研究不多,以上采用的多是上送下吸和斜对角的空气对流形式,这种对流形式应用于大型喷漆室是切实可行的,但也存在一些缺陷:     

湿式喷烤漆房合适湿度的保证措施

湿式喷烤漆房可不受场地限制,减少喷漆烘烤的一次投资,它适合过喷漆雾量大的大型工件批量生产,是新型的涂装设备.介绍了喷烤漆房的定义,干式、湿式喷烤漆房的区别、特点和应用工况以及湿式喷烤漆房研制的必要性,阐述了保证烘干时湿度不超标是湿式喷烤漆房技术关键的原因.从理论分析、结构设计和喷烤漆房操作3个方面介绍了保证湿式喷烤漆房烘烤时湿度不超标的措施.结果表明,湿式喷烤漆房湿度超标问题是可以解决的.     

CFD-based modeling and design for energy-efficient VOC emission reduction in surface coating systems

Volatile organic compounds (VOC’s) are among the most hazardous substances generated in surface coating operations. Hence, VOC emission must be strictly controlled. In this paper, we introduce a CFD-based system modeling and analysis approach to investigate VOC emission mechanisms and to identify the key design and operation parameters of a general surface coating application system for energy-efficient emission reduction. A case study on paint spray in different design environments demonstrates the efficacy of the introduced modeling and analysis approach. It shows that a redesign of the ventilation system of a spray booth and an adjustment of the operational parameter can reduce VOC emission to the level below the threshold limit value; meanwhile, the energy efficiency can be improved significantly. The introduced modeling and analysis technique for energy-efficient VOC reduction is applicable to various industrial practices.     

湿膜厚度规校准装置研究

分析了湿膜厚度规在建筑、喷涂等行业的应用技术要求,提出了一套实用并满足技术要求的校准装置设计方案,最后给出了误差源分析和校准结果的不确定度估算.     

微米结构聚合物涂层的制备及减阻性能研究

采用高压空气喷涂工艺,制备了一种聚合物涂层。利用白光干涉表面形貌仪对涂层表面形貌进行了表征,结果表明该涂层表面具有微米级凹坑结构。根据表面元素分析的结果,说明了涂层表面形貌形成的机理。通过小型高速水洞的测试,验证了该涂层的减阻效果。并以微漩涡理论解释了减阻机理。     

The Solubilization of Drug and Excipient Into a Hydroxypropyl Methylcellulose (HPMC)-Based Film Coating as a Function for the Coating Parameters in a 24” Accela-Cota®

During the aqueous film coating of tablets, components of tablets tend to migrate to the film coating. This migration is enhanced if a component is soluble in the coating solution and also depends on the spray condition used during the coating operation. In this study, a 2³ orthogonal factorial design was used to study the migration of drug and stearic acid from a tablet to an aqueous-based cellulose coating solution. The independent variables evaluated were atomization air pressure, inlet air temperature, and spray rate. Differential scanning calorimetry was used to quantitate the presence of guaifenesin and stearic acid in the film coating. In the 24' Accela Cota that was used on our experiment, only spray rate and inlet air temperature influenced the migration of drug and stearic acid the film coating.     

The Solubilization of Drug and Excipient Into a Hydroxypropyl Methylcellulose (HPMC)-Based Film Coating as a Function for the Coating Parameters in a 24” Accela-Cota®

Abstract

During the aqueous film coating of tablets, components of tablets tend to migrate to the film coating. This migration is enhanced if a component is soluble in the coating solution and also depends on the spray condition used during the coating operation. In this study, a 2³ orthogonal factorial design was used to study the migration of drug and stearic acid from a tablet to an aqueous-based cellulose coating solution. The independent variables evaluated were atomization air pressure, inlet air temperature, and spray rate. Differential scanning calorimetry was used to quantitate the presence of guaifenesin and stearic acid in the film coating. In the 24″ Accela Cota that was used on our experiment, only spray rate and inlet air temperature influenced the migration of drug and stearic acid the film coating.     

用尼龙涂覆活塞式隔膜泵的工艺研究

系统地研究了尼龙1010的性能特征和成膜工艺,在确定了铝基合金制成的工件上用流化床涂覆尼龙1010新工艺的基础上,寻求尼龙1010涂覆活塞式隔膜泵工艺的最优参数和较理想的工艺流程.讨论了工件表面状况、预热温度、流化床温度、涂覆时间、塑化温度、塑化时间、淬火液温度对涂层性能的影响,通过正交试验法确定最优工艺参数,同时确定了较好的涂覆工艺流程,解决了活塞式隔膜泵的防腐蚀问题,它具有造价低、经久耐用的特点.     

新型汽车车箱涂装线的工艺设计及应用

详细介绍了新型汽车车箱涂装线的工艺设计、设备选型及生产应用.新型涂装线在设计上考虑了大车型、高产量、多品种的通性及人们对涂装产品越来越高的质量要求,运用了先进的涂装技术,尤其在涂装设备及材料的选型方面,更是体现了高自动化、易管理维护的现代化生产特点,从而在生产应用中实现了高质量、低能耗、低污染的运行模式,展现了新型汽车车箱涂装线的独特风格.     

A Novel Acoustomicrofluidic Nebulization Technique Yielding New Crystallization Morphologies

A novel acoustic microfluidic nebulization platform is demonstrated, which, due to its unique ability to access intermediate evaporation rate regimes—significantly faster than that in slow solvent evaporation but considerably below that achieved in spray drying, is capable of producing novel crystal morphologies that have yet to be reported in both model inorganic and organic systems. In addition, the potential for simultaneously encapsulating single crystals within a biodegradable polymeric coating in a single simultaneous step together with the crystallization process as the solvent evaporates during nebulization is briefly shown. The platform not only has the potential to be highly scalable by employing a large number of these low‐cost miniature devices in parallel to achieve industrially relevant particle production rates, but could also be advantageous over conventional spray drying in terms of energy utilization, given the tremendous efficiency associated with the high‐frequency ultrasonic microdevice as well as its ambient temperature operation.