Studies Of Heat Transfer Performance Of Casting Sand Cabinet

In the foundry industry, the performance of sand has a great impact on the quality anddefective index of casting. The performance of sand mainly refers to its temperature,intensity, compactability and moisture. Among them, the sand temperature has the greatestimpact on the casting. High temperature of sand can bring lots of harm to casting. The paperis to find a model of sand that is suitable for cooling sand, combining with enhanced heattransfer method, based on the theoretical analysis of heat transfer process of sand cabinet.This paper is based on the casting sand cooling related knowledge，from the casting sandcooling heat transfer principle，firstly simulate natural cooling heat transfer effect of sandcabinet，then looking for some reasonable cooling system. Through the contrast analysis,explain the selected cooling methods in theory. We can reach the highest temperature insideof sand and time-temperature in order to determine the effect of cooling. Establish similarmodel of sand cabinet then sort out the experiment data according to similarity theory,which provides a theoretical basis for latter experimental analysis.In this paper, the following method of enhanced heat transfer is mentioned in thesimulation analysis:(1) Needle rib added on the outer surface of the sand storage cabinet.(2)Sleeve added on the outer of the sand storage cabinet.(3) Changed arrangement of needlerib.(4) Using the heat pipe.(5) Combining sleeve with needle rib.(6) Adding fans to inletof the sleeve. The first two methods above are used to have the preliminary test simulationanalysis, and the latter four methods are to optimize the model of sand storage cabinet,which is to find a more reasonable measure of cooling sand temperature.The focus of this study is on the numerical simulation of heat transfer. Establish adifferent three-dimensional model of sand storage cabinet by finite element analysissoftware, then carry out numerical simulation analysis of gas-solid coupling. We can reachthe highest temperature inside of sand and time-temperature in order to determine the effectof cooling.The results show that the cooling effect of the sand storage cabinet with is obvious and itscost is low; the cooling effect of the sand storage cabinet with heat pipe is more obvious buthigher costs.There is an experimental design of two simple model of sand cabinet by similarity theoryin this paper. Establish similar model of sand cabinet then sort out the experiment data according to similarity theory, which provides a theoretical basis for latter experimentalanalysis.