浅谈车身用密封胶在防腐密封上的定义方法

介绍了车身用密封胶涂胶定义的主要方法,从焊缝涂胶定义、车身底部地板面涂胶定义、四门两盖涂胶定义、需美观部位的涂胶定义等方面阐述了方法要点,着重介绍了车身焊缝涂胶定义中的机舱、前围、地板涂胶定义理论.     

Robotic Roof Ditch综合应用技术小结

本文简要介绍了车身顶条自动化涂胶综合新工艺,摒弃了传统手工涂胶加饰条安装,改进了国外机器人自动涂胶系统工艺,减少了先期投资和后期维护,通过自主创新,集成了车内涂胶和车顶涂胶机器人系统,实现了具有外饰性涂胶功能的自动化涂胶系统,在提高柔性化的同时有效降低生产成本,提高汽车制造技术应用水平。     

铝蒙皮半自动涂胶工艺研究

为提高产品表面防水胶涂胶效率及涂胶质量,文章经过调研,对比现有涂3种胶方法的优缺点,结合单位生产实际,最终确定对传统手工涂胶方式进行改进,采用半自动涂胶方式.通过参数对比试验,并对试件进行淋雨试验,验证了该产品半自动涂胶工艺方案的可行性,确定了合理的工艺参数.最终证明了半自动涂胶可提升胶层表面质量,提升涂胶效率、节约胶...     

汽车PVC涂胶工艺及缺陷分析简介

汽车PVC涂胶作为整车防腐和密封的重要工序直接影响到整车的使用性能。由PVC涂胶缺陷引起的车身锈蚀及车内进水都会引起客户抱怨,尤其是车内进水,可能导致用户退车。本文通过介绍PVC涂胶工艺、常见缺陷及预防措施以及车用PVC涂胶发展趋势,对车用PVC涂胶作简要探讨。     

一种胶条涂胶烘干机

正一种胶条涂胶烘干机,包括机架,机架上设有工作面,工作面上设有加热区、涂胶区,涂胶区设有涂胶系统,烘干区设加热系统,机架顶端装有抽风系统机架上还设有操作面板和电气控制系统。一种胶条涂胶烘干机,其有益效果是:(1)具体使用时,胶条从后端装入至前端送料机构,经过涂胶机构时胶水靠涂胶滚轴将胶水带起,胶水粘在橡胶条上,通过烘烤机构将橡胶条上的胶水烤干,使胶水粘接在胶条     

轿车行李盖备件PVC涂胶器具的改进

就目前汽车制造业内备件制造过程中难以涂胶或涂胶困难的问题,根据目前生产线工艺线体所需,设计开发了一种新的PVC涂胶器具,此器具兼具电泳及涂胶一体,无需捆绑铁丝,无需将备件装在报废车身过PVC线涂胶等复杂操作,这将大幅提升备件的生产效率及过程质量的控制,降低员工的劳动强度,就此对此器具做简要介绍。     

浅谈汽车涂装同步工程涂胶密封分析

介绍了新车型产品设计阶段,涂装的涂胶密封工艺同步工程分析内容.结合典型实例,对影响涂胶密封效果、涂胶施工等问题的产品结构提出合理的优化建议,以有效提升车身密封结构的工艺合理性和施工性,也为后续汽车涂装的涂胶密封同步工程分析工作提供借鉴.     

浅谈乘用车底涂胶机器人喷涂调试

机器人自动喷涂底涂胶PVC能够有效地保证车身涂胶的一致性,提高车身品质,同时减少操作人员。阐述了在新车型试生产时底涂胶机器人喷涂仿形示教的方法和过程注意事项。     

浅谈汽车涂装新线体涂胶系统的工艺调试

介绍了汽车涂装新建线体中涂胶系统工艺调试的一般步骤、要点及注意事项,以及作者参与该涂装新线涂胶系统调试过程中的一些体会,为汽车涂装新线涂胶系统工艺调试提供参考依据．     

溶剂型丙烯酸酯压敏胶的性能及其在海绵制品中的应用

概述了溶剂型丙烯酸酯压敏胶的性能和用途,介绍了底涂剂的原理、作用和组成以及丙烯酸酯压敏胶在各种泡绵制品中的应用状况,包括涂胶方式、涂胶海绵的要求、涂背胶时的对策及涂胶海绵保持力的检测方法。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。