消失模鑄造工藝流程j（Lost foam casting process J）

1、消失模鑄造工藝流程j（Lost foam casting process J）Lost foam casting process jiq:1. Make foam white mold, combined pouring system, surface brush of gasification mould, spray special high temperature resistant coating and dry.2, the special interlayer sand box placed on the vibration table, fill in the bottom sa

2、nd (dry sand) vibration, scraping, the drying of the gasification mold placed on the bottom sand, filled with dry sand, micro vibration appropriate time flat box mouth.3, cover with plastic film, put on the gate cup, vacuum system suction vacuum, dry sand fastening molding, pouring, white mold gasif

3、ication disappeared, metal liquid instead of its location.4, to be released after condensation vacuum casting box, casting out from loose dry sand.EPC process integrates the advantages of solid casting and V casting, and is suitable for all kinds of castings, such as cast steel, cast iron, cast copp

4、er, cast aluminum and other grades, various materials, different structures of large, medium and small castings. Use dry sand solid, original prototype; high dimension accuracy of castings, uniform; no core, no deduction box, casting without flash, burr; surface smoothness is close to precision cast

5、ing, stable internal structure, eliminate and reduce the porosity and gas air casting defects. The whole production process has two levels of environmental protection, no pollution.Scientific conclusion: in sum, EPC is consistent with the general trend of casting technology development, and has a br

6、oad prospect. Compared with the traditional casting technology, the advantages of EPC technology has incomparable. In 1999, the Ministry of science and technology published the lost foam casting technology as the national key high and new technology, which was praised as "casting technology in

7、twenty-first Century" and "green revolution of foundry industry" by domestic and foreign casting circles".The pollution of dust, smoke and noise is reduced, the working environment of foundry workers is greatly improved, and the labor is reducedThe dynamic strength, in male domin

8、ated industry can become to female dominated sectors;Special equipment for EPCThe main difference between die casting and other casting methods is its unique black area and white area part. The white area refers to the mold section and model combination and paint drying part, black area refers to th

9、e other casting industry.The special equipment for lost foam casting is:The white area:Mould industry: preforming machine, steam cylinder, molding machine, drying chamber model etc.Model combination and paint drying part: coating grinding machine, paint mixing drum, model of drying equipment etc.Bla

10、ck area:Other casting industry: vibration table and other vacuum system, sand processing system, sand box, sand adding device, sand box transportation system.16., the dust, soot and noise pollution are reduced, the working environment of foundry workers is greatly improved, and the labor is reducedT

11、he dynamic strength, in male dominated industry can become to female dominated sectors;21. simplified plant design, investment in fixed assets can be reduced from 30 to 40%, and the building area covers an area ofReduce from 30 to 50%, the power consumption can be reduced from 10 to 20%;TwoNine. Los

12、t foam casting line1. simple line: less investment, simple equipment, suitable for small scale, small batch production2. flow production line: the system is complete, complete functions, continuous operation, suitable for mass production, large-scale productionOpen loopClosed loopFoam plastic mould

13、produce carbon monoxide, carbon dioxide, water and other hydrocarbon gases in combustion, its content is sometimes more than the European standards allow use of water, but the ring of negative pressure, more than the standard European standard.Dry sand can use natural silica sand (quartz sand can be

14、 used repeatedly, 97%), does not contain other additives. The coating used in the model is composed of additives such as binder in water, which does not pollute the air and the environment. Use dry sand solid, easy to cast more than one box; no sand core, no button box, without any additives; saving

15、 machine, reduce cleanup costs; small area, saves workshop investment; less intermediate links, high production efficiency;High dimension accuracy of castings, uniform, no burr; precision casting surface near precision casting; environmental clean without pollution; the labor intensity is low, less

16、labor, less skilled workers; less investment, quick start; operating procedures, easy to master.Quiet waiting, just for the moment of gloryThe other side of the mountainWho has been waiting for whom?Who is still waiting for whom?Early autumn night, sitting outside the window of the study, listen to

17、the drizzle, the rain Fenyang banging on the windows, a little bit like a light heart buckle, arouse the fuzzy memory, some have already been watered down the years mottled faintly, those people, those things, such as song time, flowing into the poem.Love this song very long knife - "memories i

18、n the rain", hoarse voice, is about love or resentment? This rain rainy night, such a lonely restless, desolate, sorrow, sorrow, it is natural to think of the rain stains red flowers, the fragrance fades, sadly between several copies of sad, depressed, feeling very much. A glass of wine, indulg

19、e in the misty song, just want to have a little drink drunk, can write some words to dull eyes.It seems that I have become a poem in the rain.Application of medium frequency smelting furnace:200-2500HZ intermediate frequency power supply is used for induction heating. The power range is 20-2500KW. I

20、t is mainly used for smelting steel, alloy steel and special steel. It can also be used for smelting and lifting of non-ferrous metals such as copper and aluminum.Characteristic：Small volume, light weight, high efficiency, low power consumption; 2) the surrounding temperature of the furnace is low,

21、less smoke, good operating environment; (3) the operation process is simple, reliable operation of smelting; (4) homogeneous metal components; (5) the melting temperature, fast heating, easy control and high production efficiency; 6) using the stove high efficiency, convenient replacement of varieti

22、es;Brief introduction of structure:The furnace body comprises a furnace shell, induction coil, lining, tilting reducer box consists of four main parts, the furnace shell made of non-magnetic material, the induction coil is composed of thick wall spiral cylinder made of 2.7 mm rectangular hollow tube

23、, pipe cooling water melting. The coil leads to the copper bar and the water-cooled cable connected, close to the lining of the induction coil, composed of quartz sand laying a solid sintering furnace, a furnace tilting tilting gear box directly rotate. The tilting gear box two of worm transmission,

24、 good self-locking performance, stable and reliable rotation, in case of emergency when the breakpoint is manually tilting to avoid danger, can be selected by the selection switch control of two Taiwan furnace furnace tilting gear box motor, switch box with four core rubber line enables the operator

25、 to stand in the right the position of the furnace body tilting, reset jog control.Hengyuan electric furnace production of intermediate frequency power supply with advanced design, digital intelligent control system (computer). The medium frequency power supply adopts voltage feedback series resonan

26、t circuit, and the conversion efficiency is as high as 97.5%. Regardless of the output power, the power factor is always no less than 0.95, the harmonic component is less, and the influence on the power grid is small. A double power supply variable frequency medium frequency power supply can realize

27、 the effect of two single supply variable frequency power supply, but only one transformer and one high voltage power supply line. If the medium frequency power supply can be used nearly 100%, the molten metal solution can be continuously provided, and the required insulation power can be continuous

28、ly supplied to the insulated furnace. The temperature of the metal solution in the holding furnace is stable, and no mechanical or electronic switching switch can be used to supply and distribute power to two furnaces. The operation is simple and the failure rate is low. The intermediate frequency p

29、ower supply can be used as a furnace for lining sintering, and another furnace can perform melting operation normally.In addition to the conventional over-current, overvoltage, interception, cut-off pressure, lack of phase, water delay, inverter failure to wait until the protection, the unique desig

30、n of misoperation protection, won the praise of users. Medium frequency power supply maintenance is simple: intelligent control board maintenance is simple, the line adopts unit design, each work unit has working state and fault display, maintenance and overhaul is extremely simple.If furnace furnac

31、e series features:Heating speed, high production efficiency, less oxidation and less carbon, saving material and forging die costThe principle of intermediate frequency induction heating for electromagnetic induction, the heat generated in the workpiece, ordinary workers to work for ten minutes afte

32、r the intermediate frequency electric furnace can continuously work forging tasks, no burning furnace burning furnace and professional workers in sealing furnace work. There is no need to worry about the waste of heating billets caused by power failure or equipment failure. Because of the fast heati

33、ng rate, the oxidation rate is very little. At least 20-50 tons of raw material of steel can be saved and the material utilization ratio can reach 95%. Because the heating method is uniform and the core surface temperature is very small, the life of the forging die is greatly increased, and the roug

34、hness of the forging surface is less than 50um.The working environment is superior, which can improve workers' working environment and company image, without pollution and low energy consumptionCompared to induction heating furnace and furnace, baking workers no longer under the scorching sun st

35、ove and smoke, all indicators can reach the environmental protection department, the future development trend of company's external image and the forging industry also set up. Induction heating is the most energy saving heating mode in electric heating furnace. The power consumption is less than

36、 360 degrees from room temperature heating to 1100 tons of forgings.Heating uniformity, core surface temperature is very small, high temperature control accuracyThe heat of induction heating is generated in the workpiece itself, so the heating is uniform, and the core surface temperature is very sma

37、ll. Application of temperature control system can achieve accurate control of temperature, improve product quality and pass rate.Intermediate frequency electric heating device has the advantages of small volume, light weight, high efficiency, excellent processing quality and favorable thermal enviro

38、nment and other advantages are quickly eliminated coal stove, gas furnace, fuel furnace and ordinary resistance furnace is a new generation of metal heating equipment.Medium frequency electric furnace is the main equipment of casting, forging and heat treatment workshop. Its stability, reliability a

39、nd safety are the guarantee of normal and stable work of foundry, forging and heat treatment production line.The carburizing agent can be added when charging, but the burning of 58% should be considered. The effect of aluminum is deoxidation, should be added at tapping, adding amount of 0.30.5%.In o

40、rder to reduce the appearance of bubbles and increase the density of the surface, aluminum is usually put out when the water is out of the waterWorking principle: the basic component of induction furnace is the induction coil made of copper tube. The induction coil is equipped with alternating volta

41、ge to produce alternating electromagnetic field, and the conductive material is placed in the induction coil. Because the electromagnetic induction produces eddy current in the material, the electric energy is changed into heat energy by the resistance, so as to heat the material.Characteristic：1. T

42、he equipment is small in size, light in weight, high in efficiency and less energy consumption;2, low temperature around the furnace, less smoke and dust, good working environment;3. The operation process is simple and the melting operation is reliable;4, heating temperature uniformity, less burning

43、, metal composition uniformity;5. The casting quality is good, melting temperature furnace temperature is easy to control, and the production efficiency is high;6, furnace utilization rate is high, convenient to replace varieties.Can be divided into: crucible furnace and melting ditch furnace, the g

44、eneral use of crucible furnace, crucible furnace and no core, there are two kinds of core, generally use coreless medium frequency induction furnaceCharacteristics of closed cooling machine1, closed cycle cooling, there is no debris into the cooling pipe system, resulting in pipe blockage phenomenon

45、.2, soft water pots and pans cooling, at high temperature and no scale formation, caused by the cooling pipe system fouling, pipeline overheating damage occurred.3, small footprint, no dig pool, easy access, save water, reduce energy consumption.4, using evaporative heat absorption cooling mode, hig

46、h cooling efficiency.5, due to the closed cycle, the medium is not affected by the environment, it will not pollute the environment.6, automatic digital control temperature, automatic liquid level control, energy saving, high precision, easy to operate, simple.Determination of medium 1 and crucible

47、mouldMedium frequency furnace crucible is an important part of intermediate frequency furnace,To have high temperature resistance, insulation, heat insulation, energy conduction, to have the ability to resist flushing, compression, in addition, it must also have electrical characteristics and does n

48、ot affect the magnetic stirring capacity. The size and depth of the mould determine the thickness of the furnace wall and hearth. The mold is too large, the furnace wall becomes thinner, the static pressure increases with the increase of volume of crucible, crucible wall under the influence of scour

49、ing force life, but can improve the power factor. The mold is too small, the furnace wall thickness, static pressure decreases with the crucible capacity, reduce erosion under the crucible wall, is beneficial to prolonging the life, but also reduce the resistance increased with the increase of the p

50、ower factor, increase the cost of production. Therefore, it is very important to choose suitable mould.2, late managementThe new lining must be done in the following aspects. The melting material should be clean, dry and oil free material, so as to build the sintering layer of the furnace wall. The

51、first few furnaces avoid high power power supply smelting, the high power will produce great electromagnetic stirring force, but not completely solid lining sintering layer washed away. Third, adding iron should be light, evenly throwing iron, touching the furnace wall is easy to damage the thin sin

52、tering layer, resulting in consumption off, affecting the lining life. Evenly adding iron can balance furnace temperature to prevent incrustation. The slag melting point is higher than the melting point of the melting material, the slag crust melting material can not contact with the solution, melti

53、ng difficult, the bottom of the furnace crucible is eroded by high temperature. Melting temperature should be avoided during melting. The temperature is directly proportional to the charge consumption, and the higher the temperature is, the faster the material consumption is, and the higher the risk

54、 is. The baking temperature of the molten iron should be controlled below 1450 degrees, the melting temperature should be controlled at about 1300 degrees, and the holding temperature should be controlled in the case that the liquid surface is not crust. The lining of the daily inspection, check whe

55、n blow in the stove wall has no crack, drop phenomenon, if timely treatment.3, ramming processTamping process mainly depends on the uniformity and compactness of tamping. Tamper with the scene, must be clean, no debris. The rammed, will use a tool to check again, are not rust and dregs phenomenon. (

56、3) refractory protection layer for checking line turns. If there is a defect, the refractory is repaired, and the wire turns are protected to prevent the molten liquid from entering the contact line. Install alarm system to ensure the normal operation of the test system. Laying furnace. With the length of 300mm, the wall of the furnace is paved with two layers, and the interface is sta