共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
5.
6.
7.
介绍了珠光面漆的基本组成,特点及喷涂工艺。详细分析了影响涂层质量的各种因素,常见故障的产生及排除方法。该工艺已应用于实际生产,并取得了良好效果。 相似文献
8.
介绍了整机免喷涂工艺的特点,以及该工艺对部件涂装工艺、运输器具设计、物流配送、装配调试、涂装质量控制方面的要求。 相似文献
9.
10.
11.
12.
Gregor Toschkoff Daniele Suzzi Walter Tritthart Franz Reiter Merten Schlingmann Johannes G. Khinast 《American Institute of Chemical Engineers》2012,58(2):399-411
In the pharmaceutical industry, more than half of all tablets receive a film coating. A commonly used technique is drum coating, where a film solution is applied to the moving tablets by a spray nozzle. Important process parameters include the amount and temperature of drying air, as well as spray nozzle position. Among other influences, the proper adjustment of these parameters has a great impact on spray loss, defined as the fraction of spray liquid that does not form a film on the tablets. Often, the lack of scientific data hinders a process setup based on engineering principles, resulting in operational conditions based on trial‐and‐error approaches. Here, we show how a coating system can be numerically modeled by means of computational fluid dynamics (CFD) techniques. Furthermore, we present how different parameters affect the efficiency of the process, leading to a deeper understanding of the coating device. © 2011 American Institute of Chemical Engineers AIChE J, 2012 相似文献
13.
本文在分析窑尾上升烟道结皮危害及产生原因的基础上,介绍了我公司国内首创采用高压水枪清除烟道结皮的方法、效果和注意事项. 相似文献
14.
15.
Barium strontium alumino silicate (BSAS); (Ba0.6Sr0.4Al2Si2O8) was synthesized through solid state reaction between BaCO3, SrCO3, Al2O3 and SiO2 subjected to wet milling in isopropanol for about 24 h. The sequence of the solid state reaction was studied by subjecting to DG/DTG from room temperature to 1550 °C. The crystallographic phase evolution was confirmed by X-ray diffraction of the powders calcined in the range 1000 to 1300 °C for 2 h. The monoclinic celsian phase obtained at 1300 °C, pelletized through uniaxial pressing was sinterable to 67 to 78% density in the temperature range of 1300 to 1500 °C. The density improved to 75 to 94% after ball milling for 76 h, while ZrO2 addition further improved the density by 2%. The celcian phase of BSAS was dispersed in isopropyl alcohol, milled for about 24 h and spray coated on to plain SiC and mullite precoated SiC substrates. Sintering of coated samples and characterization for weight gain/loss, microstructure, scratch test prove that mullite + BSAS coating is more effective than single layer coating of BSAS on SiC substrates. 相似文献
16.
为了解决汽车涂装生产中由于工艺设计不合理而造成的涂料使用过量的问题,通过正交试验对喷涂SPM-155珠光黑工艺进行了优化,找出了影响色漆用量的主次因素,确定了最优的工艺参数为:静电电压70kV,涂料喷涂量270mL/min,成型空气压力0.16MPa,旋杯转速27000r/min,施工黏度12.5s。3个月的生产实践证明,优化后的工艺使单车色漆用量降为1.84kg,比优化前的用量2.1kg节约了0.26kg,年效益可达70万元。 相似文献
17.
分享了海沃氏使用先进涂装设备提高生产效率的经验:快速换色粉房ColorMax系统的使用使整个换色时间由1 h减少到4 min 20 s,Encore粉末喷枪的应用克服了传统喷枪存在的粉末涂出量、带电效果及雾化效果不稳定的问题,单级回收粉房的应用使粉末上粉率达到98%以上。新设备工艺技术的使用在提升产品品质的同时有效地控制了生产成本。 相似文献
18.
针对镍钴铝酸锂(NCA)三元正极材料普遍存在的循环寿命差、浆料容易凝胶等缺点进行了硼酸喷雾包覆的改性。采用X 射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)及电化学测试等方法对硼酸包覆改性前后的材料性能进行了对比表征和分析。结果表明:喷雾包覆后可以在NCA正极材料表面形成一层保护层,改性后的NCA三元正极材料循环寿命有明显提升,特别是高温(45 ℃)1C/1C倍率下循环50次容量保持率由改性前的88.0%提升至改性后的95.2%,提升近7%;硼酸包覆可以改善NCA表面特性,使正极浆料稳定性大大提高。改性后的NCA正极浆料可以稳定放置168 h(7 d),解决了NCA正极材料容易凝胶的问题。 相似文献
19.
《Ceramics International》2017,43(6):4858-4865
Nanorods of lanthanum phosphate obtained by a wet chemical precipitation route were granulated to obtain sizes in the range of 10–15 µm by spray drying from aqueous slurry of 35 wt% solid loading and 2 wt% of PVA binder. The powders thus obtained displayed enhanced flowability and were plasma sprayed on to stainless steel substrates resulting in the formation of adherent coatings of 150–180 µm thickness. These coatings were characterized using electron microscopy, X-ray diffraction analysis and Raman spectroscopy. X-ray analysis indicated phase instability of LaPO4 during plasma spraying resulting in the formation of oxy and polyphosphates of lanthanum (La2P4O13 and La3PO7). However, post deposition heat treatment of coated samples at 1100 °C for 2 h resulted in the reversible formation of stoichiometric lanthanum orthophosphate (LaPO4). Raman spectral analysis was used to confirm the phase structure of the coatings deposited at various plasma input powers. The coatings obtained were found to effectively lower the thermal conductivity of the substrates from ~24 W/mK to less than 19 W/mK (~10%) even at 200 °C. 相似文献