介绍了铁模覆砂铸造大型空心球铁曲轴的工艺。
This paper described the foundry technology of horizontal pouring and solidifying to produce large hollow ductile iron crankshaft cast in sand coated iron mould.
对轮盘的铁型覆砂铸造成形过程进行了数值模拟，获取了铸造填充过程的基本参数。
The solidification process of turntable in sand-faced iron mould was numerically studied, and the basic parameters of the process were obtained.
介绍了双金属榨轴的铁型覆砂铸造工艺，并对榨螺用白口铸铁的化学成分作了适当地调整。
The sand-lined metal mold casting technique for bimetallic squeezing axle was investigated. The suitable chemical composition in the white cast iron was to be adjusted.
它能除去覆盖砂石表面的杂质，同时破坏包覆砂粒的水汽层，以利于脱水，起到高效洗砂清洗作用。
It can remove the gravel covered surface impurities, while destruction of water vapor coated layer of sand to facilitate the dehydration, the role played efficient washing sand cleaning.
主营产品有汽车刹车间隙自动调整臂(获得国家实用新型专利)、第三代轿车轮毂轴承单元、镁合金成型产品、铁膜覆砂铸造、车载pc等。
Our main products include Auto slack adjusters (patent technology), 3g wheel hubs, magnesium alloy die-casting parts, Sand-Coated die casting, mobile PC system etc.
在亚洲和非洲贫脊干旱的沙漠中就有砂猫的踪迹，这种猫长有特殊的爪子，爪子上覆有皮毛可以让其免于受到灼热砂子的伤害。
The sand cat is found in the arid deserts of Asia and Africa and has particularly furry feet to protect them from the scorching sands.
覆有金刚砂粉末或沙的硬纸。
本论文研发了一套通用粉末快速成形平台并对SLS覆膜砂快速成形工艺进行了实验研究。
In this dissertation, it develops a set of platform for general powder instant prototyping and takes experimental studies to SLS coated-sand technics.
针对这一问题，开发了适合于多层防砂的KV-3型可以延时固化的网络树脂覆膜砂。
In the light of this problem, we developed KV-3 net resin covered sand for multi - layers sand control.
介绍了一种高性能覆膜砂用酚醛树脂的制作工艺。
A manufacturing process of high performance coated sand phenolic resin was introduced.
分析了覆膜砂在热作用下对型砂强度、断裂表面和变形的影响。
Effects of heat performance on strength? Fractures and bending of coat sand were analyzed.
介绍了网络剂的筛选、网络剂长度及加量的确定、网络覆膜砂强度的改进及影响网络覆膜砂的各种相关因素。
This paper introduced the selection of net agent, the definition of net agent length and added quantity, improving of net cover sand strong etc.
讨论了制备用作压裂支撑剂的树脂覆膜砂使用的树脂和固化剂的选择、包胶设备及工艺。
The selection of resin and curing agent and the equipment and the technology are discussed for manufacturing resin coated sand as proppant for hydraulic fracturing.
我国自行研制的XS2120型覆膜砂生产线已用于生产，本文对该线工艺流程及该线两个主要设备的专利技术作一简介。
Model XS2120 Hot Sand Coating Production line developed by ourselves has been commissioned, of which process procedure and patented technique of two major facilities are briefly described.
综合评价了小型液压阀体铸件型芯的芯砂材料，介绍了覆膜砂热芯盒设计特点以及覆膜砂制芯设备等。
Sand mixtures of cores for small hydraulic valves casting were reviewed. Design of hot boxes and equipments for production of coated sand cores were described.
论述了普通铸钢、铸铁件用的覆膜砂、非铁合金铸件用的易溃散覆膜特种性能覆膜砂。
The coating sand for cast iron and cast steel and collapsible coating sand for nonferrous alloy casting are also described.
分析了覆膜砂固化中残余应力的形成过程，提出了一些用于控制残余应力的主要工艺措施。
The formation of the residual stress during hardening process of the resin coated sand was analyzed, and some main measures to control the residual stress were proposed.
测定了覆膜种砂在激热条件下的膨胀值，并与相同条件下普通覆膜硅砂的膨胀值进行了对比。
The thermal expansion values of the precoated non silica and have been measured and contrasted with them of the precoated silica sand on the same conditions.
研究了热塑性酚醛树脂和原砂对覆膜砂性能的影响。
The effect of thermoplastic phenolic resin and sand on performance of resin coated sand was researched.
砂丘相对平坦或有波状起伏的覆草沙地，通常在海岸边。
Relatively flat or undulating sandy turf-covered ground usually along a seashore.
这种烧结剂是一种改性酚醛树脂，它和作为耐火骨料的原砂混合制成覆膜砂作为激光烧结材料更加适用于激光快速成型过程。
Precoated sand made of mixing this kind of resin and sand can serve as laser sintering material which suits laser rapid molding process much more.
本论文研发了一套通用粉末快速成形平台并对SLS覆膜砂快速成形工艺进行了实验研究。
In this dissertation, a universal rapid prototyping platform with powder is developed and an experimental study of SLS coated-sand technic is made.
其次，本文要解决的第二个问题就是如何提高壳法用覆膜砂的抗拉强度。
Secondly, another problem that will be solved in this paper is how to improve the intensity of resin coated sand used for shell process.
为此开发了适合于多层防砂的LH网络树脂覆膜砂。
According to this problem, we developed LH net resin covered sand for multi layers sand control.
研究了壳芯砂用酚醛树脂及覆膜砂在受热条件下性能的变化。
Properties of phenolic resin and coated sand are studied under heating conditions.
安制芯工艺分：自硬砂制芯设备、热芯合制芯机、覆膜砂制芯机、冷芯合制芯机。
Safety system core technology: self hardening sand core equipment, hot core and core machine, coated sand core machine, cold core and core machine.
生产实践表明，提高了覆膜砂的质量，降低了生产成本。
Practise of production proves that this method can raise the quality of sand and lower the production cost.
选择性激光烧结覆膜砂芯的成形过程分烧结和后固化两步。
The forming process of selective laser sintered resin coated sand cores includes two steps which are selective laser sintering and post-curing.
在覆膜砂生产过程中，砂温应高于树脂的塑性-假塑性转变温度。
It was considered that during the production process of RCS the sand temperature should be higher than the plasticity to false-plasticity conversion temperature of resin.
此形成的一种涂覆蛋白质砂芯用于铸造熔融金属。
This forms a protein coated sand core for use in casting molten metals.
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