CN103909215A - Method and device for regenerating casting sand of lost foam casting production line - Google Patents
Method and device for regenerating casting sand of lost foam casting production line Download PDFInfo
- Publication number
- CN103909215A CN103909215A CN201410165002.6A CN201410165002A CN103909215A CN 103909215 A CN103909215 A CN 103909215A CN 201410165002 A CN201410165002 A CN 201410165002A CN 103909215 A CN103909215 A CN 103909215A
- Authority
- CN
- China
- Prior art keywords
- sand
- cooling
- knockout
- casting
- ash disposal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to the technical field of lost foam casting, and discloses a method and a device for regenerating casting sand of a lost foam casting production line. The device for regenerating casting sand comprises a sand falling and filling system, a dust removal cooling system, a sand selecting system, a sand conveyer system, a center sand bin, a middle sand bin, a control system and a dust removal system. The method for regenerating casting sand comprises the following steps: carrying out casting sand cleaning, dusting and cooling, sand selecting, and sand filling for molding on to-be-processed casting sand used in a casting procedure so as to obtain the regenerated casting sand. The method and the device are suitable for the lost foam casting production line with treasure sand as casting sand; the dust removal cooling system is compact in structure and high in cooling efficiency and has an energy-saving effect; the operations of sand falling and sand filling procedures are integrated into a system, so that the running efficiency of the system is obviously improved, and interference and restriction formed when the procedures cannot be synchronously performed are avoided.
Description
Technical field
The present invention relates to Technology of EPC field, particularly a kind of method of evaporative pattern sand reclamation and device.
Background technology
In casting industry, evaporative pattern is one of emerging, state-of-the-art casting technique, has multiple different call.Domestic main call has " dry sand cavityless casting ", " vacuum full mold casting ", is called for short EPC casting.
Lost foam casting process is normally first combined into model by the paraffin similar to casting dimension shape or bubbles model bonding, brush after fireproof coating oven dry, model is placed in to sandbox, then insert dry sand vibration molding, finally under negative pressure, pour into a mould, make model gasification, liquid metals occupies modal position, solidify cooling rear formation foundry goods, after foundry goods takes out from sand mold, whole sand mold becomes again the sand being scattered.
The technique of lost foam casting process comprises white area, black area and yellow district technique, in existing Technology of EPC, black area is the operation of carrying out sand processing, by the molding sand well sand preparing system after using is screened, dedusting etc. process after regeneration, it mainly act as: screen out impurity in molding sand foreign material such as () sand lump, scum, coating dust, cooling, carry and store molding sand.
From the casting technique of evaporative pattern and the requirement to equipment, dry sand has unavoidably fragmentation and efflorescence in moulding use and cyclic process, simultaneously, the coating dust decomposing in casting process also can be sneaked into wherein, can worsen the performance of molding sand, reduce gas permeability, consume more binding agent, therefore need broken molding sand and efflorescence and coating to decompose and the dust of formation is removed.
And Foundry sand is still taking silica sand as main, its performance can meet the requirement of most of foundry goods conventionally, easily gather materials on the spot, but, because silica sand thermal coefficient of expansion is larger, and can expand because phase transformation produces suddenly, thermal diffusivity is lower, easily react formation chemical scab with the oxide of iron, also have the shortcomings such as dust harzard is serious simultaneously.
In addition, initial temperature after the molding sand demoulding is very high, conventionally there is 200-500 DEG C, in evaporative pattern is produced, when sand excess Temperature, in modeling process, can scorch film or cause film warpage, therefore before moulding, sand temperature should be controlled at 55 DEG C as far as possible and just can reuse below, therefore needs efficient cooling device to realize.Therefore, do not configure the lost foam casting process of sand preparing system, the stability that is difficult to show the feature that lost foam casting production environment is good and guarantees product quality.
Casting industry has three kinds conventionally to the type of cooling of pattern of fever sand, the one, hot sand is placed on to the place natural drying of appointment, allow hot sand naturally lower the temperature, this mode is lowered the temperature very slow, thereby in whole evaporative pattern technique, need a large amount of dry sands to have enough to meet the need, and the hot sand of airing also needs the place of certain area, cause production cost higher, the 2nd, air-cooled, be placed on specific equipment by hot sand, ventilate to equipment, the heat of hot sand to be taken away, this mode cooling rate is also slow, and can produce a large amount of dust pollution air, causes working environment very severe, the 3rd, hot sand is lowered the temperature by heat-exchanger rig, current heat-exchanger rig generally includes the cylinder that rotate in an axle center around self, normally level or approach horizontal direction of the axle center of cylinder, hot sand is entered by one end of cylinder, flowed out by the other end, the top of cylinder is provided with a sparge pipe, sparge pipe is to the outer surface water spray of cylinder, thereby the heat that absorbs cylinder makes the hot sand cooling in cylinder, and current this heat-exchanger rig is conventionally lower to the cooling effectiveness of hot sand, and the weight ratio of cylinder and hot sand is heavier, therefore head roll rotation needs very large power, energy consumption while causing using is higher, and water is sprinkled upon cylinder surface rear portion and forms steam, liquid water is sprinkled upon cylinder around, cause working environment very poor, these types of cooling to hot sand have slatterned the huge heat that hot sand comprises completely, be not utilized effectively.
And in lost foam casting system, often carry out the cooling of molding sand with ebullated bed formula cooling device, for example in domestic publication 201210380959.3, mention a kind of evaporative pattern sand preparing system, its technical scheme, comprise roller sand screener, the vibration chutes and the belt that are located at roller sand screener rear side hang magnetic separator, be located at the heat-resisting bucket elevator that vibration chutes and belt hang magnetic separator rear side, be located at 2 middle sand storages of heat-resisting bucket elevator rear side, in the middle of being located at, sand storage rear side is the cooling dedust device of ebullated bed, be located at the transition sand hopper of dedust device rear side, be located at the Pneumatic conveyer of transition sand hopper rear side, be located at 2 plain bumper top sand hoppers of Pneumatic conveyer rear side, the rear side of plain bumper top sand hopper is provided with rain type and adds sand machine, in the scheme of its treatment system, cooling dedust device is for using ebullated bed cooling device, 1. energy consumption is high following significantly deficiency, 2. volume is large, footprint area and space are large, 3. cooling-down effect is poor, water consumption is large, because cooling line is outside shell, the molding sand of boiling can not directly contact with cooling line, reduce conduction heat transfer efficiency, 4. accommodation is narrow, not exclusively be applicable to the molding sand such as the mound sand of large density.
Summary of the invention
The object of the invention is to overcome method and device that a kind of Lost Form Casting Production Line sand reclamation that overcomes above-mentioned technical deficiency is provided, technical scheme of the present invention comprises the steps:
Used pending molding sand in casting process is carried out to molding sand cleanup step, obtain reclaimed sand, then reclaimed sand is carried out to ash disposal cooling step and obtain cooling sand, then select sand step to obtain regenerated foundry sand in cooling sand, then regenerated foundry sand is filled to through filling moulding step in the sand mo(u)ld of casting process or by direct regenerated foundry sand center conveyor sand storage.
Concrete technological process is as follows:
Casting process uses mound sand to cast as molding sand, contains alundum (Al2O3) 75%-90% in molding sand in composition, di-iron trioxide 1-5%, and titanium dioxide 2-5%, silica 7-15%, described molding sand dihedral coefficient is less than 1.1, and diameter is 0.05-3mm.
In knockout back-up sand system, right vertical rail rollback by the casting case after cast from hollow track, casting case to be cast enters by the upper cross track of hollow track, rollback slightly cooled casting case are by the lower cross track of square shape track and the top knockout of left vertical rail arrival knockout grid, knockout enters knockout funnel, then enter in inertial oscillation conveyer and clear up through knockout funnel, sand storage in the middle of reclaimed sand after cleaning is delivered to by the first conveying device, then being delivered to ash disposal cooling device by the second conveying device, to carry out ash disposal cooling,
It is cooling that ash disposal cooling device carries out ash disposal, obtain cooling sand, ash disposal cooling device is with coolant circulation unit and air-supply arrangement, reclaimed sand in ash disposal cooling device forms the thin layer sand gravity that leans on behind the scenes and from top to bottom transmits, form convection current with thin layer sand curtain form and cold wind, when carrying out convection heat transfer' heat-transfer by convection and dedusting, hot regenerated foundry sand carries out heat loss through conduction with thin layer sand curtain form and liquid cooling parts again, because liquid cooling parts are positioned at cooling and dedusting device inside, can effectively reduce the heat transfer of cooling-part to environment, save the energy, improve system cools efficiency, molding sand after treatment, temperature can be reduced to below 50 DEG C, within making its temperature range that reaches moulding back-up sand technical requirement defined.
Cooling sand, by the 3rd conveying device, is delivered to the sand system of selecting, and obtains regenerated foundry sand successively after selecting sand machine, transition funnel, sand temperature adjusting device, and regenerated foundry sand is delivered to plain bumper top sand hopper by the 4th conveying device, then enters rain type and adds sand machine; Casting case after knockout exits from knockout grid top, and the upper cross track of inlet port font track, moves to rain type and add sand machine downside, carries out filling moulding, thereby enters next casting circulation.
The device of realizing the inventive method comprises knockout back-up sand system, ash disposal cooling system, select sand system, sand induction system, center sand storage, middle sand storage, control system, dust pelletizing system, described sand induction system is made up of four conveying devices, knockout back-up sand system is connected with middle sand storage by the first conveying device, middle sand storage is connected with ash disposal cooling system by the second conveying device, ash disposal cooling system is connected with selecting sand system by the 3rd conveying device, select sand system to be connected with knockout back-up sand system with center sand storage respectively by the 4th conveying device, dust pelletizing system and knockout back-up sand system, ash disposal cooling system, select sand system, sand induction system, center sand storage, middle sand storage is connected respectively, control system and knockout back-up sand system, ash disposal cooling system, select sand system, sand induction system, center sand storage, middle sand storage, dust pelletizing system is connected respectively.
Knockout back-up sand system comprises that casting case, hollow track, knockout grid, knockout funnel, inertial oscillation conveyer, plain bumper top sand hopper and rain type add sand machine, casting case is carried in the cocycle of square shape track, hollow track is positioned at knockout grid top, knockout funnel is between knockout grid and inertial oscillation conveyer, inertial oscillation transporter is connected with the first conveying device, plain bumper top sand hopper is connected with the 4th conveying device, and the rear side of plain bumper top sand hopper is provided with rain type and adds sand machine.
Ash disposal cooling system comprises ash disposal cooling device, coolant circulation unit and air-supply arrangement, ash disposal cooling device comprises housing, dedusting mouth, cooling liquid inlet, cooling liquid outlet, sand entrance, sand outlet, air-cooled cavity, liquid cooling parts, cooling air inlet, liquid cooling parts are made up of cooling coil and metallic plate, and cooling coil and air-cooled cavity are positioned at the both sides of metallic plate; Liquid cooling parts are positioned at housing inner side, the top of liquid cooling parts is provided with cooling liquid outlet, the bottom of liquid cooling parts is provided with cooling liquid inlet, cooling liquid inlet is connected with coolant circulation unit with cooling liquid outlet, and liquid cooling parts and housing inner side form air-cooled cavity, and the top of air-cooled cavity is provided with sand entrance and dedusting mouth, dedusting mouth is positioned at the top of sand entrance, the bottom of air-cooled cavity is provided with cooling air inlet and sand outlet, and cooling air inlet is connected with air-supply arrangement, and dedusting mouth is connected with dust pelletizing system.
Select sand system by selecting sand machine, transition funnel, sand temperature adjusting device and circulating water device to form, selecting sand machine can be roller sand screener or magnetic separator.Circulating water device is connected with sand temperature adjusting device, and transition funnel is selecting between sand machine and sand temperature adjusting device, selects sand machine to be connected with the 3rd conveying device, and sand temperature adjusting device is connected with the 4th conveying device.
Conveying device in the present invention is bucket elevator or Pneumatic conveyer.
Usefulness of the present invention is:
Ash disposal cooling system structure compactness, carries out knockout by gravity when cooling, is more suitable for the molding sand processing bigger than normal in mound sand isodensity.In addition, can also effectively remove because sneaking into the cracking of molding sand of coating mixed the dust in people's molding sand, just realize the underground environmental requirement without molding sand in whole foundry production with the good gas permeability of guarantee molding sand and the requirement of realization " in the air without dust ", improve operating environment and condition of work.
Before back-up sand, select sand operation, configuration sand temperature modulator, regulates in the scope that sand temperature allows in technique, can reduce under the conditions such as climate change, and temperature, on the conforming impact of back-up sand, improves significantly for the size of controlling foundry goods.
Mound sand is formed by bauxite melt-blown, thermal coefficient of expansion is little, configure molding sand with it, foundry goods can not produce expansion bug, mound sand profile rounding, mobility, fillibility are good, are neutrality and refractoriness very high, therefore molding sand has enough mobility to come the position, the dark chamber of complexity of filled and process apperance, coordinates dope layer to have certain mechanical strength and uses and can effectively prevent crush.
The present invention also uses the slideway of " mouth " font that knockout and two technological operations of back-up sand are incorporated in an operation, can significantly improve the running efficiency of system.
And by equipment such as middle sand storage, surge hoppers, the transport of molding sand is played the effect of buffering, prevent from the phase mutual interference and the restriction that form from greatly having reduced operating cost in the time that knockout, moulding operation can not synchronization jobs.
Brief description of the drawings
Fig. 1 is system schematic of the present invention;
Fig. 2 is ash disposal cooling device of the present invention (ramp type) structural representation;
Fig. 3 is ash disposal cooling device of the present invention (spiral) structural representation;
Fig. 4 is sand process flow figure of the present invention.
Detailed description of the invention
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Embodiment 1
Apparatus for recovery of molding sand comprises knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6, control system 70, dust pelletizing system 80, described sand induction system 40 is made up of four conveying devices, knockout back-up sand system 10 is connected with middle sand storage 6 by bucket elevator 41, middle sand storage 6 is connected with ash disposal cooling system 20 by bucket elevator 42, ash disposal cooling system 20 is connected with selecting sand system 30 by bucket elevator 43, select sand system 30 to be connected with knockout back-up sand system 10 with center sand storage 5 respectively by bucket elevator 44, dust pelletizing system 80 and knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6 is connected respectively, control system 70 and knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6, dust pelletizing system 80 is connected respectively.
Knockout back-up sand system 10 comprises casting case 101, hollow track 102, knockout grid 103, knockout funnel 104, inertial oscillation conveyer 105, plain bumper top sand hopper 106 and rain type add sand machine 107, casting case 101 is carried in 102 cocycles of square shape track, hollow track 102 is positioned at knockout grid 103 tops, knockout funnel 104 is between knockout grid 103 and inertial oscillation conveyer 105, inertial oscillation transporter 105 is connected with bucket elevator 41, plain bumper top sand hopper 106 is connected with bucket elevator 44, the rear side of plain bumper top sand hopper 106 is provided with rain type and adds sand machine 107.
Ash disposal cooling system 20 comprises ash disposal cooling device 21, coolant circulation unit 22 and air-supply arrangement 23, ash disposal cooling device 21 comprises housing 211, dedusting mouth 212, cooling liquid inlet 213, cooling liquid outlet 214, sand entrance 215, sand outlet 216, air-cooled cavity 217, liquid cooling parts 218, cooling air inlet 219, liquid cooling parts 218 are made up of cooling coil 2181 and metallic plate 2182, and cooling coil 2181 and air-cooled cavity are positioned at the both sides of metallic plate 2182, liquid cooling parts 218 are positioned at housing 211 inner sides, the top of liquid cooling parts 218 is provided with cooling liquid outlet 214, the bottom of liquid cooling parts is provided with cooling liquid inlet 213, cooling liquid inlet 213 is connected with coolant circulation unit 22 with cooling liquid outlet 214, liquid cooling parts 218 form air-cooled cavity 217 with housing 211 inner sides, the top of air-cooled cavity 217 is provided with sand entrance 215 and dedusting mouth 212, dedusting mouth 212 is positioned at the top of sand entrance 215, the bottom of air-cooled cavity 217 is provided with cooling air inlet 219 and sand outlet 216, cooling air inlet 219 is connected with air-supply arrangement 23, dedusting mouth 212 is connected with dust pelletizing system 80.
Select sand system 30 by selecting sand machine 31, transition funnel 32, sand temperature adjusting device 33 and circulating water device 34 to form, select sand machine 31 for magnetic separator.
Circulating water device 34 is connected with sand temperature adjusting device 33, and transition funnel 32 is selecting between sand machine 31 and sand temperature adjusting device 33, selects sand machine 31 to be connected with bucket elevator 43, and sand temperature adjusting device 33 is connected with bucket elevator 44.
The step of carrying out sand reclamation by this device is as follows:
Casting process 0 uses mound sand to cast as molding sand, contains alundum (Al2O3) 90% in molding sand in composition, di-iron trioxide 1%, and titanium dioxide 2%, silica 7%, described molding sand dihedral coefficient 1, diameter is 0.9mm.
In knockout back-up sand system 10, right vertical rail rollback by the casting case 1011 after cast from hollow track, casting case 1012 to be cast enters by the upper cross track of hollow track, rollback slightly cooled casting case 1011 are by the lower cross track of square shape track and the top knockout of left vertical rail arrival knockout grid 103, knockout enters knockout funnel 104, then enter in inertial oscillation conveyer 105 and clear up through knockout funnel 104, sand storage 6 in the middle of reclaimed sand after cleaning is delivered to by bucket elevator 41, and then using bucket elevator 42 to deliver to ash disposal cooling device 21, to carry out ash disposal cooling, obtain cooling sand, ash disposal cooling device 21 is with coolant circulation unit 22 and air-supply arrangement 23, reclaimed sand in ash disposal cooling device 21 forms the thin layer sand gravity that leans on behind the scenes and from top to bottom transmits, form convection current with thin layer sand curtain form and cold wind, when carrying out convection heat transfer' heat-transfer by convection and dedusting, hot regenerated foundry sand carries out heat loss through conduction with thin layer sand curtain form and liquid cooling parts again, because liquid cooling parts are positioned at cooling and dedusting device inside, can effectively reduce the heat transfer of cooling-part to environment, save the energy, improve system cools efficiency, molding sand after treatment, temperature can be reduced to below 50 DEG C, within making its temperature range that reaches moulding back-up sand technical requirement defined.
Cooling sand is by bucket elevator 43, deliver to the sand system 30 of selecting, after selecting sand machine 31, transition funnel 32, sand temperature adjusting device 33, obtain regenerated foundry sand successively, regenerated foundry sand is delivered to plain bumper top sand hopper 106 by bucket elevator 44, then enters rain type and adds sand machine 107; Casting case 1011 after knockout exits from knockout grid 103 tops, and the upper cross track of inlet port font track moves to rain type and adds sand machine 107 downsides, carries out filling moulding 4, thereby enters next casting circulation.
Embodiment 2
Apparatus for recovery of molding sand comprises knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6, control system 70, dust pelletizing system 80, described sand induction system 40 is made up of four conveying devices, knockout back-up sand system 10 is connected with middle sand storage 6 by bucket elevator 41, middle sand storage 6 is connected with ash disposal cooling system 20 by bucket elevator 42, ash disposal cooling system 20 is connected with selecting sand system 30 by bucket elevator 43, select sand system 30 to be connected with knockout back-up sand system 10 with center sand storage 5 respectively by Pneumatic conveyer 44, dust pelletizing system 80 and knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6 is connected respectively, control system 70 and knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6, dust pelletizing system 80 is connected respectively.
Knockout back-up sand system 10 comprises casting case 101, hollow track 102, knockout grid 103, knockout funnel 104, inertial oscillation conveyer 105, plain bumper top sand hopper 106 and rain type add sand machine 107, casting case 101 is carried in 102 cocycles of square shape track, hollow track 102 is positioned at knockout grid 103 tops, knockout funnel 104 is between knockout grid 103 and inertial oscillation conveyer 105, inertial oscillation transporter 105 is connected with bucket elevator 41, plain bumper top sand hopper 106 is connected with Pneumatic conveyer 44, the rear side of plain bumper top sand hopper 106 is provided with rain type and adds sand machine 107.
Ash disposal cooling system 20 comprises ash disposal cooling device 21, coolant circulation unit 22 and air-supply arrangement 23, ash disposal cooling device 21 comprises housing 211, dedusting mouth 212, cooling liquid inlet 213, cooling liquid outlet 214, sand entrance 215, sand outlet 216, air-cooled cavity 217, ramp type liquid cooling parts 218, cooling air inlet 219, liquid cooling parts 218 are made up of cooling coil 2181 and metallic plate 2182, and cooling coil 2181 and air-cooled cavity are positioned at the both sides of metallic plate 2182, liquid cooling parts 218 are positioned at housing 211 inner sides, the top of liquid cooling parts 218 is provided with cooling liquid outlet 214, the bottom of liquid cooling parts is provided with cooling liquid inlet 213, cooling liquid inlet 213 is connected with coolant circulation unit 22 with cooling liquid outlet 214, liquid cooling parts 218 form air-cooled cavity 217 with housing 211 inner sides, the top of air-cooled cavity 217 is provided with sand entrance 215 and dedusting mouth 212, dedusting mouth 212 is positioned at the top of sand entrance 215, the bottom of air-cooled cavity 217 is provided with cooling air inlet 219 and sand outlet 216, cooling air inlet 219 is connected with air-supply arrangement 23, dedusting mouth 212 is connected with dust pelletizing system 80.
Select sand system 30 by selecting sand machine 31, transition funnel 32, sand temperature adjusting device 33 and circulating water device 34 to form, select sand machine 31 for magnetic separator.
Circulating water device 34 is connected with sand temperature adjusting device 33, and transition funnel 32 is selecting between sand machine 31 and sand temperature adjusting device 33, selects sand machine 31 to be connected with bucket elevator 43, and sand temperature adjusting device 33 is connected with Pneumatic conveyer 44.
The step of carrying out sand reclamation by this device is as follows:
Casting process 0 uses mound sand to cast as molding sand, contains alundum (Al2O3) 75% in molding sand in composition, di-iron trioxide 5%, and titanium dioxide 5%, silica 1 5%, described molding sand dihedral coefficient 1.05, diameter is 3mm.
In knockout back-up sand system 10, right vertical rail rollback by the casting case 1011 after cast from hollow track, casting case 1012 to be cast enters by the upper cross track of hollow track, rollback slightly cooled casting case 1011 are by the lower cross track of square shape track and the top knockout of left vertical rail arrival knockout grid 103, knockout enters knockout funnel 104, then enter in inertial oscillation conveyer 105 and clear up through knockout funnel 104, sand storage 6 in the middle of reclaimed sand after cleaning is delivered to by bucket elevator 41, then using Pneumatic conveyer 42 to deliver to ash disposal cooling device 21, to carry out ash disposal cooling, obtain cooling sand, ash disposal cooling device 21 is with coolant circulation unit 22 and air-supply arrangement 23, reclaimed sand in ash disposal cooling device 21 forms the thin layer sand gravity that leans on behind the scenes and from top to bottom transmits, form convection current with thin layer sand curtain form and cold wind, when carrying out convection heat transfer' heat-transfer by convection and dedusting, hot regenerated foundry sand carries out heat loss through conduction with thin layer sand curtain form and liquid cooling parts again, because liquid cooling parts are positioned at cooling and dedusting device inside, can effectively reduce the heat transfer of cooling-part to environment, save the energy, improve system cools efficiency, molding sand after treatment, temperature can be reduced to 40 DEG C, within making its temperature range that reaches moulding back-up sand technical requirement defined.
Cooling sand is by Pneumatic conveyer 43, deliver to the sand system 30 of selecting, after selecting sand machine 31, transition funnel 32, sand temperature adjusting device 33, obtain regenerated foundry sand successively, regenerated foundry sand is delivered to plain bumper top sand hopper 106 by Pneumatic conveyer 44, then enters rain type and adds sand machine 107; Casting case 1011 after knockout exits from knockout grid 103 tops, and the upper cross track of inlet port font track moves to rain type and adds sand machine 107 downsides, carries out filling moulding 4, thereby enters next casting circulation.
Embodiment 3
Apparatus for recovery of molding sand comprises knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6, control system 70, dust pelletizing system 80, described sand induction system 40 is made up of four conveying devices, knockout back-up sand system 10 is connected with middle sand storage 6 by bucket elevator 41, middle sand storage 6 is connected with ash disposal cooling system 20 by bucket elevator 42, ash disposal cooling system 20 is connected with selecting sand system 30 by bucket elevator 43, select sand system 30 to be connected with knockout back-up sand system 10 with center sand storage 5 respectively by bucket elevator 44, dust pelletizing system 80 and knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6 is connected respectively, control system 70 and knockout back-up sand system 10, ash disposal cooling system 20, select sand system 30, sand induction system 40, center sand storage 5, middle sand storage 6, dust pelletizing system 80 is connected respectively.
Knockout back-up sand system 10 comprises casting case 101, hollow track 102, knockout grid 103, knockout funnel 104, inertial oscillation conveyer 105, plain bumper top sand hopper 106 and rain type add sand machine 107, casting case 101 is carried in 102 cocycles of square shape track, hollow track 102 is positioned at knockout grid 103 tops, knockout funnel 104 is between knockout grid 103 and inertial oscillation conveyer 105, inertial oscillation transporter 105 is connected with bucket elevator 41, plain bumper top sand hopper 106 is connected with bucket elevator 44, the rear side of plain bumper top sand hopper 106 is provided with rain type and adds sand machine 107.
Ash disposal cooling system 20 comprises ash disposal cooling device 21, coolant circulation unit 22 and air-supply arrangement 23, ash disposal cooling device 21 comprises housing 211, dedusting mouth 212, cooling liquid inlet 213, cooling liquid outlet 214, sand entrance 215, sand outlet 216, air-cooled cavity 217, spiral liquid cooling parts 218, cooling air inlet 219, liquid cooling parts 218 are made up of cooling coil 2181 and metallic plate 2182, and cooling coil 2181 and air-cooled cavity are positioned at the both sides of metallic plate 2182, liquid cooling parts 218 are positioned at housing 211 inner sides, the top of liquid cooling parts 218 is provided with cooling liquid outlet 214, the bottom of liquid cooling parts is provided with cooling liquid inlet 213, cooling liquid inlet 213 is connected with coolant circulation unit 22 with cooling liquid outlet 214, liquid cooling parts 218 form air-cooled cavity 217 with housing 211 inner sides, the top of air-cooled cavity 217 is provided with sand entrance 215 and dedusting mouth 212, dedusting mouth 212 is positioned at the top of sand entrance 215, the bottom of air-cooled cavity 217 is provided with cooling air inlet 219 and sand outlet 216, cooling air inlet 219 is connected with air-supply arrangement 23, dedusting mouth 212 is connected with dust pelletizing system 80.
Select sand system 30 by selecting sand machine 31, transition funnel 32, sand temperature adjusting device 33 and circulating water device 34 to form, select sand machine 31 for roller sand screener.
Circulating water device 34 is connected with sand temperature adjusting device 33, and transition funnel 32 is selecting between sand machine 31 and sand temperature adjusting device 33, selects sand machine 31 to be connected with bucket elevator 43, and sand temperature adjusting device 33 is connected with bucket elevator 44.
The step of carrying out sand reclamation by this device is as follows:
Casting process 0 uses mound sand to cast as molding sand, contains alundum (Al2O3) 85% in molding sand in composition, di-iron trioxide 2%, and titanium dioxide 3%, silica 1 0%, described molding sand dihedral coefficient 1.04, diameter is 0.5mm.
In knockout back-up sand system 10, right vertical rail rollback by the casting case 1011 after cast from hollow track, casting case 1012 to be cast enters by the upper cross track of hollow track, rollback slightly cooled casting case 1011 are by the lower cross track of square shape track and the top knockout of left vertical rail arrival knockout grid 103, knockout enters knockout funnel 104, then enter in inertial oscillation conveyer 105 and clear up through knockout funnel 104, sand storage 6 in the middle of reclaimed sand after cleaning is delivered to by bucket elevator 41, and then using bucket elevator 42 to be delivered to ash disposal cooling device 21, to carry out ash disposal cooling, obtain cooling sand, ash disposal cooling device 21 is with coolant circulation unit 22 and air-supply arrangement 23, reclaimed sand in ash disposal cooling device 21 forms the thin layer sand gravity that leans on behind the scenes and from top to bottom transmits, form convection current with thin layer sand curtain form and cold wind, when carrying out convection heat transfer' heat-transfer by convection and dedusting, hot regenerated foundry sand carries out heat loss through conduction with thin layer sand curtain form and liquid cooling parts again, because liquid cooling parts are positioned at cooling and dedusting device inside, can effectively reduce the heat transfer of cooling-part to environment, save the energy, improve system cools efficiency, molding sand after treatment, temperature can be reduced to 45 DEG C, within making its temperature range that reaches moulding back-up sand technical requirement defined.
Cooling sand is by bucket elevator 43, deliver to the sand system 30 of selecting, after selecting sand machine 31, transition funnel 32, sand temperature adjusting device 33, obtain regenerated foundry sand successively, regenerated foundry sand is delivered to plain bumper top sand hopper 106 by Pneumatic conveyer 44, then enters rain type and adds sand machine 107; Casting case 1011 after knockout exits from knockout grid 103 tops, and the upper cross track of inlet port font track moves to rain type and adds sand machine 107 downsides, carries out filling moulding 4, thereby enters next casting circulation.
Above embodiment is for understanding the present invention's; not limitation of the present invention, about the those of ordinary skill in field, on the basis of technical scheme described in claim; can also make multiple variation or modification, these variations or modification should be understood to still belong to protection scope of the present invention.
Claims (10)
1. a method for Lost Form Casting Production Line sand reclamation, is characterized in that: the method comprises the steps: used pending molding sand in casting process (0) to carry out molding sand cleaning (1) step to reclaimed sand; Then reclaimed sand is carried out to ash disposal cooling (2) step and obtain cooling sand; Then cooling sand is selected sand (3) step to obtain regenerated foundry sand; Then regenerated foundry sand is filled to through filling moulding (4) step in the sand mo(u)ld of casting process (0) or by direct regenerated foundry sand center conveyor sand storage (5).
2. a method for Lost Form Casting Production Line sand reclamation, is characterized in that: described select sand (3) step to be divided into husky and temperature adjustment two steps of sieve to carry out.
3. the method for Lost Form Casting Production Line sand reclamation as claimed in claim 1, is characterized in that: the step of described peeling (1) and filling moulding (4) is as follows:
In knockout back-up sand system (10), right vertical rail rollback by the casting case (1011) after cast from hollow track, casting case (1012) to be cast enters by the upper cross track of hollow track, rollback slightly cooled casting case (1011) are by the lower cross track of square shape track and the top knockout of left vertical rail arrival knockout grid (103), knockout enters knockout funnel (104), then enter in inertial oscillation conveyer (105) and clear up through knockout funnel (104), sand storage (6) in the middle of reclaimed sand after cleaning is delivered to by the first conveying device (41), then being delivered to ash disposal cooling device (21) by the second conveying device (42), to carry out ash disposal cooling,
Regenerated foundry sand after selecting sand (3) is delivered to plain bumper top sand hopper (106) by the 4th conveying device (44), then enter rain type and add sand machine (107), casting case (1011) after knockout exits from knockout grid (103) top, the upper cross track of inlet port font track, move to rain type and add sand machine (107) downside, carry out filling moulding (4), thereby enter next casting circulation.
4. the method for a kind of Lost Form Casting Production Line sand reclamation as claimed in claim 1, it is characterized in that: in described moulding snad composition, contain alundum (Al2O3) 75%-90%, di-iron trioxide 1-5%, titanium dioxide 2-5%, silica 7-15%, described molding sand dihedral coefficient is less than 1.1, and diameter is 0.05-3mm.
5. a Lost Form Casting Production Line apparatus for recovery of molding sand, is characterized in that: described apparatus for recovery of molding sand (9) comprises knockout back-up sand system (10), ash disposal cooling system (20), select sand system (30), sand induction system (40), center sand storage (5), middle sand storage (6), control system (70), dust pelletizing system (80), described sand induction system (40) is made up of four conveying devices, knockout back-up sand system (10) is connected with middle sand storage (6) by the first conveying device (41), middle sand storage (6) is connected with ash disposal cooling system (20) by the second conveying device (42), ash disposal cooling system (20) is connected with selecting sand system (30) by the 3rd conveying device (43), select sand system (30) to be connected with knockout back-up sand system (10) with center sand storage (5) respectively by the 4th conveying device (44), dust pelletizing system (80) and knockout back-up sand system (10), ash disposal cooling system (20), select sand system (30), sand induction system (40), center sand storage (5), middle sand storage (6) is connected respectively, control system (70) and knockout back-up sand system (10), ash disposal cooling system (20), select sand system (30), sand induction system (40), center sand storage (5), middle sand storage (6), dust pelletizing system (80) is connected respectively.
6. Lost Form Casting Production Line apparatus for recovery of molding sand as claimed in claim 5, it is characterized in that: described knockout back-up sand system (10) comprises casting case (101), hollow track (102), knockout grid (103), knockout funnel (104), inertial oscillation conveyer (105), plain bumper top sand hopper (106) and rain type add sand machine (107), described casting case (101) is carried in square shape track (102) cocycle, hollow track (102) is positioned at knockout grid (103) top, knockout funnel (104) is positioned between knockout grid (103) and inertial oscillation conveyer (105), inertial oscillation transporter (105) is connected with the first conveying device (41), plain bumper top sand hopper (106) is connected with the 4th conveying device (44), the rear side of plain bumper top sand hopper (106) is provided with rain type and adds sand machine (107).
7. Lost Form Casting Production Line apparatus for recovery of molding sand as claimed in claim 5, it is characterized in that: ash disposal cooling system (20) comprises ash disposal cooling device (21), coolant circulation unit (22) and air-supply arrangement (23), described ash disposal cooling device (21) comprises housing (211), dedusting mouth (212), cooling liquid inlet (213), cooling liquid outlet (214), sand entrance (215), sand outlet (216), air-cooled cavity (217), liquid cooling parts (218), cooling air inlet (219), described liquid cooling parts (218) are made up of cooling coil (2181) and metallic plate (2182), cooling coil (2181) and air-cooled cavity are positioned at the both sides of metallic plate (2182), described liquid cooling parts (218) are positioned at housing (211) inner side, the top of liquid cooling parts (218) is provided with cooling liquid outlet (214), the bottom of liquid cooling parts is provided with cooling liquid inlet (213), cooling liquid inlet (213) is connected with coolant circulation unit (22) with cooling liquid outlet (214), liquid cooling parts (218) form air-cooled cavity (217) with housing (211) inner side, the top of air-cooled cavity (217) is provided with sand entrance (215) and dedusting mouth (212), dedusting mouth (212) is positioned at the top of sand entrance (215), the bottom of air-cooled cavity (217) is provided with cooling air inlet (219) and sand outlet (216), cooling air inlet (219) is connected with air-supply arrangement (23), dedusting mouth (212) is connected with dust pelletizing system (80).
8. Lost Form Casting Production Line apparatus for recovery of molding sand as claimed in claim 5, it is characterized in that: the described sand system (30) of selecting is by selecting sand machine (31), transition funnel (32), sand temperature adjusting device (33) and circulating water device (34) to form, circulating water device (34) is connected with sand temperature adjusting device (33), transition funnel (32) is positioned at and selects between sand machine (31) and sand temperature adjusting device (33), select sand machine (31) to be connected with the 3rd conveying device (43), sand temperature adjusting device (33) is connected with the 4th conveying device (44).
9. Lost Form Casting Production Line apparatus for recovery of molding sand is characterized in that as claimed in claim 5: the described sand machine (31) that selects is roller sand screener or magnetic separator.
10. Lost Form Casting Production Line apparatus for recovery of molding sand as claimed in claim 5, is characterized in that: described conveying device is bucket elevator or Pneumatic conveyer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165002.6A CN103909215B (en) | 2014-04-23 | 2014-04-23 | Method and device for regenerating casting sand of lost foam casting production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165002.6A CN103909215B (en) | 2014-04-23 | 2014-04-23 | Method and device for regenerating casting sand of lost foam casting production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103909215A true CN103909215A (en) | 2014-07-09 |
| CN103909215B CN103909215B (en) | 2017-01-25 |
Family
ID=51035390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410165002.6A Active CN103909215B (en) | 2014-04-23 | 2014-04-23 | Method and device for regenerating casting sand of lost foam casting production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103909215B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353778A (en) * | 2014-09-03 | 2015-02-18 | 宁波创二代机械科技有限公司 | Sandy soil circulating device for rail type casting machine |
| CN104550694A (en) * | 2015-01-30 | 2015-04-29 | 青田中天铸造阀门有限公司 | Sand shakeout regeneration system |
| CN104815945A (en) * | 2015-03-31 | 2015-08-05 | 安徽惠明机械制造有限公司 | Sand treatment technology for high nickel austenite nodular cast iron |
| CN108097868A (en) * | 2018-02-11 | 2018-06-01 | 江西亿丰精密铸造有限公司 | Lost foam casting dust cleaning in sand treating section heat-extraction system |
| CN109434012A (en) * | 2018-12-31 | 2019-03-08 | 兴化市剑达铸造有限公司 | A kind of lost foam casting process of high-mechanical property casting |
| CN112404344A (en) * | 2020-11-06 | 2021-02-26 | 南通大学 | Casting waste sand regeneration device and method based on heat carrier partition heat transfer |
| CN113399621A (en) * | 2021-06-23 | 2021-09-17 | 河南省德强实业有限公司 | Full-automatic sand processing system |
| CN114192768A (en) * | 2021-12-15 | 2022-03-18 | 广州市荣泽模具有限公司 | Intelligent production line for lost foam casting |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566637A (en) * | 1982-04-16 | 1986-01-28 | Combustion Engineering, Inc. | Thermal sand reclamation system |
| CN87103119A (en) * | 1987-04-24 | 1988-11-09 | 日本铸造株式会社 | The sand reclamation device |
| US5045090A (en) * | 1988-05-26 | 1991-09-03 | Pohl Giesserreitechnik | Process and device for reclaiming used foundry sands |
| CN102233405A (en) * | 2010-04-27 | 2011-11-09 | 于彦奇 | Digital resin sand regeneration system |
| CN102873268A (en) * | 2012-09-25 | 2013-01-16 | 马鞍山市晨光高耐磨科技发展有限公司 | Foundry self-hardening sand recycling system process |
| CN102886491A (en) * | 2012-10-10 | 2013-01-23 | 安徽红星阀门有限公司 | Resin sand regenerating system |
| CN102886492A (en) * | 2012-10-10 | 2013-01-23 | 安徽红星阀门有限公司 | Evanescent mode sand processing system |
| CN102909315A (en) * | 2012-09-22 | 2013-02-06 | 湖北江汉重工有限公司 | Full-automatic reprocessing line of casting-purpose resin sand |
| CN203061799U (en) * | 2013-02-04 | 2013-07-17 | 浙江红马铸造有限公司 | Resin sand production device |
-
2014
- 2014-04-23 CN CN201410165002.6A patent/CN103909215B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566637A (en) * | 1982-04-16 | 1986-01-28 | Combustion Engineering, Inc. | Thermal sand reclamation system |
| CN87103119A (en) * | 1987-04-24 | 1988-11-09 | 日本铸造株式会社 | The sand reclamation device |
| US5045090A (en) * | 1988-05-26 | 1991-09-03 | Pohl Giesserreitechnik | Process and device for reclaiming used foundry sands |
| CN102233405A (en) * | 2010-04-27 | 2011-11-09 | 于彦奇 | Digital resin sand regeneration system |
| CN102909315A (en) * | 2012-09-22 | 2013-02-06 | 湖北江汉重工有限公司 | Full-automatic reprocessing line of casting-purpose resin sand |
| CN102873268A (en) * | 2012-09-25 | 2013-01-16 | 马鞍山市晨光高耐磨科技发展有限公司 | Foundry self-hardening sand recycling system process |
| CN102886491A (en) * | 2012-10-10 | 2013-01-23 | 安徽红星阀门有限公司 | Resin sand regenerating system |
| CN102886492A (en) * | 2012-10-10 | 2013-01-23 | 安徽红星阀门有限公司 | Evanescent mode sand processing system |
| CN203061799U (en) * | 2013-02-04 | 2013-07-17 | 浙江红马铸造有限公司 | Resin sand production device |
Non-Patent Citations (1)
| Title |
|---|
| 韩修玉: ""日本旧砂回收再利用技术和设备概况"", 《铸造机械》, no. 02, 31 May 1983 (1983-05-31), pages 46 - 53 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353778A (en) * | 2014-09-03 | 2015-02-18 | 宁波创二代机械科技有限公司 | Sandy soil circulating device for rail type casting machine |
| CN104353778B (en) * | 2014-09-03 | 2017-01-25 | 宁波创二代机械科技有限公司 | Sandy soil circulating device for rail type casting machine |
| CN104550694A (en) * | 2015-01-30 | 2015-04-29 | 青田中天铸造阀门有限公司 | Sand shakeout regeneration system |
| CN104550694B (en) * | 2015-01-30 | 2017-04-19 | 青田中天铸造阀门有限公司 | Sand shakeout regeneration system |
| CN104815945A (en) * | 2015-03-31 | 2015-08-05 | 安徽惠明机械制造有限公司 | Sand treatment technology for high nickel austenite nodular cast iron |
| CN108097868A (en) * | 2018-02-11 | 2018-06-01 | 江西亿丰精密铸造有限公司 | Lost foam casting dust cleaning in sand treating section heat-extraction system |
| CN108097868B (en) * | 2018-02-11 | 2023-06-13 | 江西江工精密机械有限公司 | Dust removal and heat extraction system for lost foam casting sand treatment |
| CN109434012A (en) * | 2018-12-31 | 2019-03-08 | 兴化市剑达铸造有限公司 | A kind of lost foam casting process of high-mechanical property casting |
| CN112404344A (en) * | 2020-11-06 | 2021-02-26 | 南通大学 | Casting waste sand regeneration device and method based on heat carrier partition heat transfer |
| CN112404344B (en) * | 2020-11-06 | 2022-08-30 | 南通大学 | Casting waste sand regeneration device and method based on heat carrier partition heat transfer |
| CN113399621A (en) * | 2021-06-23 | 2021-09-17 | 河南省德强实业有限公司 | Full-automatic sand processing system |
| CN114192768A (en) * | 2021-12-15 | 2022-03-18 | 广州市荣泽模具有限公司 | Intelligent production line for lost foam casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103909215B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103909215B (en) | Method and device for regenerating casting sand of lost foam casting production line | |
| CN105499504B (en) | A kind of technique of lost foam casting wearing piece | |
| CN102886491A (en) | Resin sand regenerating system | |
| CN104108717B (en) | Calcium carbide cooling molding and waste heat utilization method | |
| CN102688982A (en) | Process for roasting waste sand into precoated sand material | |
| CN210498224U (en) | Molding sand recovery unit is used in outer frame casting of generator housing buffer block | |
| CN205289646U (en) | Lost pattern casting middlings processing system disappears | |
| CN103273007A (en) | Casting technique of V12-type engine cylinder block | |
| CN103990760A (en) | Lost foam casting process of aluminum alloy cylinder body or cylinder cover | |
| CN203448603U (en) | Vacuum evaporative pattern casting hot sand treatment device | |
| CN103909216B (en) | A kind of Lost Form Casting Production Line sand preparing system | |
| JP5998845B2 (en) | Heat recovery system and heat recovery method for solidified slag | |
| CN203875273U (en) | Sand conditioning system for lost foam casting production line | |
| CN206527312U (en) | A kind of system for cooling down gravel | |
| CN210907964U (en) | White mould shaping waste heat and raw materials recovery unit | |
| CN202591538U (en) | Liquid floating type heat exchanger | |
| US20130152632A1 (en) | Method and device for manufacturing vitreous slag | |
| CN102688983A (en) | Liquid floating heat exchanger | |
| CN111842787B (en) | Automatic circulating cooling and sand-building treatment system for steel castings | |
| CN103088213B (en) | A kind of device and method cooling direct-reduction iron block | |
| CN106111901A (en) | A kind of four station mobile cart type V method moulding lines | |
| CN207026413U (en) | A kind of water jet for sand casting cools down knockout integrated device | |
| CN108555236B (en) | Lost foam casting sand processing system | |
| CN105033174A (en) | Spiral molding sand cooling device | |
| CN107008852A (en) | Molding sand heat exchange processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |