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1、消失模铸造工艺流程jLost foam casting process flow jiq:1. Make foam white mold, combined pouring system, surface brush of gasification mould, spray high temperature resistant paint and dry.2. The special interlayer sand box is placed on the vibrating table, filling in the bottom sand (dry sand), shaking and s
2、craping, placing the drying gasified mould on the bottom sand, filling the dry sand, and vibrating the proper time to smooth the box mouth.3, covered with plastic film, put on the gate cup, vacuum system, vacuum, dry sand after fastening molding, pouring, white mold gasification disappeared, metal l
3、iquid 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 process. It is suitable for casting, casting, casting and casting of copper, casting, casting and other large, m
4、edium 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 casting, stable internal structure, eliminate and reduce the porosity and gas air casting d
5、efects. The entire production process, two levels of environmental protection, no pollution.Scientific conclusion: in summary, EPC is in line with the current trend of casting technology development, and has broad prospects. Compared with the traditional casting technology, the advantages of EPC tec
6、hnology has incomparable. In 1999, the Ministry of science and technology published the lost foam casting technology as a high and new technology promoted by the state. It was praised by the domestic and foreign foundry circles as "casting technology in twenty-first Century" and "gree
7、n revolution in foundry industry"".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 dominated industry can become to female dominated sectors;Special equipment needed for
8、 Expendable Pattern CastingThe 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 the other casting industry.The special equipment for
9、EPC 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.Black area:Other casting industry: vibration table and other vacuum
10、system, sand processing system, sand box, sand adding device, sand box transportation system.16., 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 dominated industry can become to
11、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 、 lost foam casting line1. simple line: less investment, simple eq
12、uipment, suitable for small scale, small batch production2. flow production line: the system is complete, complete functions, continuous operation,Suitable for mass and large-scale productionOpen loopClosed loopFoam plastic mould produce carbon monoxide, carbon dioxide, water and other hydrocarbon g
13、ases 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 used repeatedly, 97%), does not contain other additives. The coating
14、used in the model is composed of additives such as binder in water and no pollution to air or environment. Use dry sand solid, easy to cast more than one box; no sand core, no button box, without any additives; saving machine, reduce cleanup costs; small area, saves workshop investment; less interme
15、diate links, high production efficiency; high dimension accuracy of castings, uniform, no burr surface; precision casting near precision casting; environmental clean without pollution; the labor intensity is low, less labor, less skilled workers; less investment, quick start; operating procedures, e
16、asy to master.A quiet wait, just for the light of the momentThe 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 the drizzle, the rain Fenyang banging on the windows, a little bit like a light
17、 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 in the rain", hoarse voice, is about love or resentment? This rain rainy ni
18、ght, 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, indulge in the misty song, just want to have a little drink drunk, can write some wor
19、ds to dull eyes.It seems that I have become a poem in the rain.Application of intermediate frequency smelting furnace:200-2500HZ intermediate frequency power supply is used for induction heating. The power range is 20-2500KW. It is mainly used for smelting steel, alloy steel, special steel, and also
20、 for smelting and lifting 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, less smoke, good operating environment; (3) the operation process is simple, reliable oper
21、ation 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 varieties;Structure introduction:The furnace body comprises a furnace shell, induction coil, lini
22、ng, 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, pipe cooling water melting. The coil leads to the copper bar and the water-cooled cable connected
23、, 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. Tilting furnace reducer is two stage worm speed change. It has good self-locking performance, stable and reliable rotation, and can be avoided by
24、 hand in case of emergency break,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 to stand in the position of the furnace body tilting, reset jog control.Hengyuan electric furnace producti
25、on of intermediate frequency power supply with advanced design, digital intelligent control system (computer). The intermediate frequency power supply adopts voltage feedback series resonant circuit, and the conversion efficiency is as high as 97.5%. Regardless of the magnitude of the output power,
26、the power factor is always not less than 0.95, the harmonic component is less, and the impact on the power grid is small. A double power supply frequency conversion intermediate frequency power supply can realize the effect of two single supply frequency conversion power supply, but only one transfo
27、rmer and one high voltage power supply line are needed. If the utilization ratio of the medium frequency power supply is close to 100%, the molten metal solution can be continuously provided, and the required insulation power can be continuously supplied to the insulated furnace. The temperature of
28、the metal solution in the heat preservation furnace is stable, and no mechanical or electronic switching switch can be used to supply and distribute power to the two furnaces. The operation is simple and the failure rate is low. With this intermediate frequency power source, when another furnace is
29、used for lining sintering, another furnace can perform melting operation normally.In addition to conventional over-current, over-voltage, closure, cut-off pressure, lack of phase, water supply delay, inverter failure, until the protection, the unique design of anti misoperation protection, won the p
30、raise of users. Medium frequency power supply maintenance is simple: intelligent control board maintenance is simple, the circuit adopts unit design, each work unit has working state and fault display, maintenance and overhaul is extremely simple.If furnace furnace series features:Heating speed, hig
31、h production efficiency, less oxidation and carbon removal, 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 after the intermediate frequency elec
32、tric 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 the heating method has fast heating speed, the uti
33、lity model has little oxidation, and at least 95% kilograms of raw material is saved by 20-50 tons per ton of forging material and a coal burning stove, and the utilization ratio of the material is up to 5%. As the heating method is uniformly heated and the temperature of the core table is very smal
34、l, the service life of the forging die is greatly increased, and the roughness of the surface of the forging 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
35、heating furnace and furnace, baking workers no longer under the scorching sun stove 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 sav
36、ing heating mode in electric heating furnace. The power consumption is less than 360 degrees from room temperature to 1100 ton.Heating evenly, the core table temperature is very small, high temperature control accuracyInduction heating, its heat generated in the workpiece itself, so uniform heating,
37、 core table temperature is minimal. Application of temperature control system can achieve precise control of temperature, improve product quality and pass rate.Medium frequency electric furnace heating device has small size,Light weight, high efficiency, excellent processing quality and favorable en
38、vironment are rapidly eliminating coal-fired stoves, gas stoves, fuel oil stoves and ordinary resistance furnaces. It 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 and
39、 safety are the guarantee of the normal and stable work of the casting, forging and heat treatment production line.Carburizing agent can be added when charging, but should consider the burning of 58%. The effect of aluminum is to remove the amount of oxygen which should be added at tapping and 0.30.
40、5%.Want to carbon cast iron, carbon phase carbon silicon ferromanganese, aluminum in the process of play is cast surface gloss, reduce appearance bubbles, increase appearance density, aluminum generally in the water when putOperation principle: the basic component of induction furnace is an inductio
41、n coil made of copper tube. The induction coil at both ends of the AC voltage, alternating electromagnetic field generated, conductive materials placed in the induction coil, due to electromagnetic induction in the material generated by eddy currents, resistance to the electric energy into heat ener
42、gy to heat the material.Characteristic：1, equipment is small, light weight, high efficiency, less energy consumption;2, the furnace temperature is low, smoke and dust less, good operating environment;3. The operation process is simple and the smelting operation is reliable;4, heating temperature uni
43、formity, burning less, metal composition evenly;5, casting quality is good, melting, temperature control furnace easily controlled, high production efficiency;6, furnace utilization rate, convenient variety.Can be divided into: crucible furnace and melting ditch furnace, the general use is crucible
44、furnace, crucible furnace and no core, there are two kinds of core, generally use coreless induction furnaceCharacteristics of closed cooling machine1, closed cycle cooling, there is no debris into the cooling pipe system, resulting in pipe blockage.2, soft water pots and pans cooling, at high tempe
45、rature and no scale formation, caused by the cooling pipe system fouling, pipeline overheating damage occurred.3, small footprint, no digging pool, easy access, save water, reduce energy consumption.4, the use of evaporative absorption cooling mode, high cooling efficiency.5, due to the closed cycle
46、, the medium is not affected by the environment, nor will it pollute the environment.6 、 automatic digital control temperature, automatic liquid level control, energy saving, high precision, easy to operate, simple.Middle 1, determination of crucible mouldIf furnace crucible is an important part of
47、medium frequency furnace to high temperature resistance, insulation, heat insulation, energy conduction, to have anti scouring, compressive ability, in addition, must also have the electrical characteristics and does not affect the magnetic stirring ability. The size and depth of the die determine t
48、he 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 scouring force life, but can improve the power factor. The mold is too small, the furnace
49、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 power factor, increase the cost of production. Therefore, it is very important to choose the appropriate die.