1)  Coating Layer
覆砂层
1.
The Influence of Parameters on the Quality of Coating Layer with Resin Bonded Sand in Centrifugal Casting;
研究了用变转速二次布砂工艺覆砂时,铸型温度及其均匀性和铸型转速等工艺参数对覆砂层厚度均匀性和表面粗糙度的影响规律。
2)  coating layer
覆砂
1.
Compared with that of furane resin bonded sand,the feasibility of phenol resin bonded sand in forming a uniform coating layer in the inside mould surface is studied as well.
本文分析研究了砂在铸型中的成型条件及光洁内表面的形成机理,并对比研究了覆膜和呋喃自硬砂在铸型内表面形成均匀覆砂层的可行性。
3)  permanent mould with sand facing
覆砂铁型
4)  Sand Lined Metal Mold
铁型覆砂
1.
Solidification Simulation and Shrinkage Defect Prediction of S.G. Iron Casting in Sand Lined Metal Mold;
铁型覆砂球墨铸铁件凝固模拟及收缩缺陷预测
5)  sand-coated chill
覆砂冷铁
1.
Shrinkage porosity, surface depression, sand inclusion and blowhole had been defects of the nodular iron clamp casting, and these defects have been eliminated by adopting following measures: on the base of former casting method, the shrinkage defect was eliminated by using chills; the chills-caused blowhole defect was eliminated by using sand-coated chills as substitute for the normal chills.
球铁夹钳生产过程中曾出现缩松、缩陷、砂眼和气孔等缺陷,在原工艺的基础上,采用外冷铁消除了缩孔、缩松缺陷;并采用覆砂冷铁取代普通冷铁,消除了冷铁引起的气孔缺陷。
6)  sand mulching culture
覆砂栽培
参考词条
补充资料:有机覆层:有机覆层
在基体材料表面覆以有机材料的材料保护层。在机械製造中﹐有机覆层的绝大部分是涂装层﹐或称油漆层。此外﹐也有用橡胶或塑料作为覆层的。需要抗酸﹑硷和抗腐蚀性气体和液体的钢铁件﹐常用厚约 3毫米的橡胶(如氯丁橡胶)或塑料(如氯化亚乙烯共聚物)黏在表面﹐可长期保护基体不受腐蚀。这种覆层主要用在大型抗蚀容器或排气系统中。埋在土壤中的金属构件﹐常以聚乙烯带包裹保护。在喷鉬或喷不锈钢的表面上涂覆聚四氟乙烯﹐在150℃温度下摩擦係数很低﹐磨损轻微﹐适於製造低载荷和要求高度清洁的滑动轴承﹐或用在食品﹑精细包装和纺织机械上。各国的Du﹑Dx轴承都是以塑料与金属复合製成的。通过静电喷涂将环氧树脂﹑氯化聚醚﹑聚四氟乙烯以及聚氯乙烯等塑料粉末涂覆在金属表面﹐可获多种抗化学腐蚀性极好的覆层﹐可用於输水﹑污水处理和海洋平台的设备上。有机覆层在辉光放电情况下﹐有机单体可以聚合成无针孔的有机膜﹐用作电容器的介质层。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。