CN107081405B - Evaporative pattern hot sand cooling processing system - Google Patents
Evaporative pattern hot sand cooling processing system Download PDFInfo
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- CN107081405B CN107081405B CN201710277722.5A CN201710277722A CN107081405B CN 107081405 B CN107081405 B CN 107081405B CN 201710277722 A CN201710277722 A CN 201710277722A CN 107081405 B CN107081405 B CN 107081405B
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- 238000001816 cooling Methods 0.000 title claims abstract description 104
- 239000004576 sand Substances 0.000 title claims abstract description 99
- 238000012545 processing Methods 0.000 title claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 96
- 239000003110 molding sand Substances 0.000 claims abstract description 73
- 238000012546 transfer Methods 0.000 claims abstract description 45
- 230000007306 turnover Effects 0.000 claims abstract description 33
- 239000003507 refrigerant Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 101100041681 Takifugu rubripes sand gene Proteins 0.000 claims description 96
- 239000000428 dust Substances 0.000 claims description 80
- 239000011229 interlayer Substances 0.000 claims description 41
- 229910052782 aluminium Inorganic materials 0.000 claims description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 30
- 238000004140 cleaning Methods 0.000 claims description 25
- 238000005453 pelletization Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 8
- 208000002925 dental caries Diseases 0.000 claims description 5
- 238000010114 lost-foam casting Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 39
- 230000001932 seasonal effect Effects 0.000 abstract description 3
- 239000011797 cavity material Substances 0.000 description 54
- 238000000034 method Methods 0.000 description 11
- 238000005457 optimization Methods 0.000 description 11
- 238000005266 casting Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of evaporative pattern hot sand cooling processing systems, including turnover machine and heat-exchanger rig, heat-exchanger rig includes a heat exchange container, heat exchange container is internally provided with the fluid heat transfer pipeline for heat exchange, heat exchanging fluid pipeline is connected to the heat exchanging fluid cooling device being set to outside heat exchange container and the heat exchanging fluid supplied in it circulates, the heat exchanging fluid cooling device includes concatenated compressor of air conditioner and A/C evaporator, compressor of air conditioner is used for gaseous refrigerant boil down to liquid, and A/C evaporator is used to convert the refrigerant of liquid to the gaseous state of low temperature.The present invention has structure simple, and low in cost, cooling effect is excellent, and molding sand cooling efficiency is high, is influenced by seasonal temperature small, and use is more stable, adapts to the advantages that environment temperature is more preferable.
Description
Technical field
The present invention relates to lost foam casting apparatus field, specifically a kind of evaporative pattern hot sand cooling processing system.
Background technique
Lost foam casting (also known as cavityless casting) is by paraffin similar with casting dimension shape or bubbles model bonding group
Synthetic model cluster is embedded in vibration molding in drystone sand, is poured under negative pressure, make model gas after brushing fireproof coating and drying
Change, liquid metals occupies modal position, and the novel casting method of casting is formed after solidification is cooling.The technique is without modulus, nothing point
Type face, without sand core, thus casting does not have overlap, burr and pattern draft, and reduce as the combination of type core and caused by size
Error.Therefore, Technology of EPC is rapidly developed in worldwide in the past 20 years.
On disappearance foundry production line, casting model powder needed after being removed from casting embryo by broken, screening with it is cooling etc. processed
Journey sends leading portion molding procedure back to.How hot sand after wherein casting therefore rapidly carries out cooling treatment since temperature is very high
It is the key that improve casting efficiency to come into operation again.
The existing casting model powder type of cooling, has following several, and one is hot sand is placed on specified place using most traditional
Temperature fall is cooling, and this mode is very slow in the presence of cooling and occupied ground is larger, it is difficult to the defects of managing, it is substantially superseded.
The defects of second is that cooled down by boiling cooling bed, but that there are equipment costs is higher, needs subsequent secondary treatment exhaust gas more.Three
Be it is the most commonly used using heat exchanger carry out it is cooling by the way of, in the existing general heat exchanger type of cooling, due to water
Specific heat capacity is larger, therefore cooling water is usually used as circulatory mediator, realizes recirculated water cooling heat exchange processing.Such as
A kind of ZL201610715605.8 once disclosed lost foam production line sand quickly cooling device；A kind of ZL once disclosed evaporative pattern
Sand cooling device is cast, this cooling technology by the way of circulating water is belonged to.
But this common recirculated water cooling exchanges heat processing mode, equally exists that occupied ground is more, and labor intensity of workers is big,
The defects of environmental pollution is serious, and climate is affected.More more hot area (such as Chongqing where applicant
Area) summer water temperature it is higher when, due to cooling water Hot swapping cause temperature increase after, recycled after being difficult fast cooling,
Lead to occur that cooling efficiency is lower, and time-consuming for system, energy consumption is high, the big defect of running noises；So that sand process flow deposits sand amount
Greatly, if it is separately larger using circulating water cooling equipment volume and occupied area.
Therefore the height of cooling rate restricts entire sand process flow and the operation of equipment is horizontal；For those skilled in the art
Member is more excellent it is necessary to research and develop a kind of cooling effect, and molding sand cooling efficiency is high, is influenced by seasonal temperature small, and use is more stable, adapts to
The hot sand processing technique of the better evaporative pattern of environment temperature.
Summary of the invention
In view of the above shortcomings of the prior art, the technical problems to be solved by the present invention are: how to provide a kind of structure letter
Single, low in cost, cooling effect is excellent, and molding sand cooling efficiency is high, is influenced by seasonal temperature small, and use is more stable, adapts to environment
The better evaporative pattern hot sand cooling processing system of temperature.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
A kind of evaporative pattern hot sand cooling processing system, including turnover machine and heat-exchanger rig, heat-exchanger rig include a heat exchange
Container, heat exchange container are internally provided with the fluid heat transfer pipeline for heat exchange, heat exchanging fluid pipeline and are set to heat exchange container
Outer heat exchanging fluid cooling device is connected to and the heat exchanging fluid supplied in it circulates, and turnover machine mould turnover direction side passes through molding sand
Conveying device and the linking of heat exchange container upper end sand inlet are provided with band in the middle part of heat exchange container lower end and shake out the sand export of switch valve；
It is characterized in that, the heat exchanging fluid in the heat exchanging fluid pipeline is gaseous refrigerant, the heat exchanging fluid cooling device includes
Concatenated compressor of air conditioner and A/C evaporator, compressor of air conditioner are used for gaseous refrigerant boil down to liquid, A/C evaporator
For converting the refrigerant of liquid to the gaseous state of low temperature.
In this way using gaseous refrigerant as heat exchanging fluid, the mode phase of the mode of this air cooling and existing conventional water cooling
Than gaseous refrigerant rapidly can cool down and take away by compressor of air conditioner and A/C evaporator in heat exchanging fluid cooling device
Heat can recycle after fast cooling, greatly improve heat exchange efficiency, in this way, being used as and changing with use cooling water
The water-cooling pattern of hot fluid is compared, and the cooling of heat exchanging fluid is influenced smaller by temperature.It is set to be particularly suitable for being difficult to fastly in cooling water
The high temperature area of prompt drop temperature processing uses.
Further include dust pelletizing system as optimization, dust pelletizing system includes the dust excluding hood for being set to dedusting position, and and with remove
The connected dedusting fan of dust hood, dedusting fan air outlet are connected with dust-removal cloth-bag, dust pelletizing system further include be connected to dust excluding hood with
Cleaning shaft between dedusting fan, cleaning shaft include the dust-collecting and heat exchanging pipeline being set in heat exchange container inner cavity.
In this way, a part, which is arranged, in the distinguished and admirable pipeline of dust pelletizing system enters formation dust-collecting and heat exchanging pipeline in heat exchange container,
It can use dust-collecting and heat exchanging pipeline and molding sand carry out heat exchange, take away one with distinguished and admirable by the dedusting inside dust-collecting and heat exchanging pipeline
The heat of tap sand, therefore compared with existing heat-exchanger rig, under the premise of not increasing additional heat exchange device power, both realizes and remove
Dirt, and dust pelletizing system is utilized to improve heat exchange efficiency, cleaning shaft reaches dedusting and cooling double effects, therefore greatly
It improves to molding sand heat exchange cooling effect.
As optimization, a vibration conveying mechanism is correspondingly arranged on positioned at the side in turnover machine mould turnover direction and is conveyed at molding sand
Device, jigging conveyer outlet and the linking of heat exchange container upper end sand inlet, dust excluding hood include being correspondingly arranged on jigging conveyer
The conveyer dust excluding hood of side.Specifically, jigging conveyer includes an angularly disposed delivery chute component, on delivery chute component
End is set to a side-lower in turnover machine mould turnover direction, and vibrator is provided on delivery chute component, and delivery chute member lower is
Mouthful, the covering of conveyer dust excluding hood is arranged above delivery chute component.
In this way, molding sand is poured into jigging conveyer by turnover machine mould turnover, exist by the delivery chute component of jigging conveyer
The conveying to molding sand is realized when vibration, so that the partial heat and dust that molding sand is mingled with can be upper well in vibration processes
Wind-force in the conveyer dust excluding hood of side siphons away, and achievees the effect that preliminary dust removal and takes away heat.Jigging conveyer is using vibration
Mode convey molding sand, the dust excluding hood that cooperation top is arranged enables to the dust being mingled in molding sand when vibration that can be shaken out
And taken away by distinguished and admirable, improve dust removing effects.
It include the heat exchange appearance of a pre- colod-application heat exchange container and a cooling as optimization, in the heat-exchanger rig
Device, turnover machine mould turnover direction side and pre- colod-application heat exchange container upper end sand inlet are connected, and bring out under pre- colod-application heat exchange container
The side Sha Kou is additionally provided with the bypass of outer end obliquely and goes out sandpipe, bypasses out sandpipe and cooling heat exchange container upper end sand inlet
Linking, cooling heat exchange container lower end sand export is for shaking out to lost foam casting boxcar；In pre- colod-application heat exchange container
Heat exchanging fluid pipeline is recycled with heat exchanging fluid cooling device again after being connected to the heat exchanging fluid pipeline in cooling heat exchange container
Connection.
It is used in series in this way, using two sets of heat exchange containers arranged side by side in heat-exchanger rig, a realization pre-cooling, a realization
It is cooling, greatly improve cooling effect and cooling treatment efficiency.
As optimization, the charging side of heat exchange container is also vertically provided with an elevator side by side in the heat-exchanger rig,
Elevator lower end is provided with for into the elevator of sand into sand hopper, elevator upper end sand export to be sent by what outer end was arranged obliquely
Sand cylinder is connected to the sand inlet of heat exchange container upper end.
In this way, promoting laggard sand to heat exchange container using elevator, heat exchange container and turnover machine are set to together
One ground makes it be conducive to layout installation, saves space.
As optimization, elevator includes vertically arranged elevator shell, and elevator shell inner cavity upper and lower ends are provided with
Sprocket wheel, upper end sprocket wheel are connected with the elevator motor driven positioned at elevator shell exterior, are arranged on the sprocket wheel of upper and lower ends
In the loop chain of vertical annular, it is provided with chain bucket on loop chain, from elevator into sand when chain bucket moves across after the sprocket wheel of lower end with loop chain
Bucket connects sand, and from elevator upper end, sand export shakes out after the sprocket wheel of upper end.Circular chain bucket hoister is used in this way, it can be preferably
Blocking is avoided, guarantees that work is smooth.Existing belt elevator or wire belt bucket can also be used when implementing certainly
The existing Structure of hoist such as formula elevator, which is realized, to be promoted.
As optimization, the heat exchange container lower end is additionally provided with outer end close to elevator side and is connected to elevator obliquely
Into the sand-returning pipe of sand hopper, sand switch valve is provided with back on sand-returning pipe.In this way, molding sand can be opened back after exchanging heat in heat exchange container
Sandpipe realizes back that sand again returns to heat exchange container and realize heat exchange to elevator, and then realizes and handle the cycle heat exchange of molding sand,
Until temperature is reduced to meet the requirements and turns off back sand switch valve, guarantee heat transfer effect.
It is located at sand inlet lower section adjacent in upper end as optimization, in heat exchange container inner cavity and is horizontally arranged with vibration along inner cavity
Material screen, vibrating is the heat transfer space for being provided with fluid heat transfer pipeline and dust-collecting and heat exchanging pipeline below equal material screen.
In this way, the uniformity of knockout distribution by equal material screen vibrating shakeout is vibrated, can be improved to improve heat transfer effect.
Further, vibrating equal material screen includes being transversely mounted in the middle part of heat exchange container inner cavity the arc-shaped arc that raises upward
Shape sieve further includes the shaker screen being mounted on sieve；It is located in the heat exchange container inner cavity inside at the sand inlet of upper end
Be extended have tubular into sand cylinder, into sand cylinder obliquely and outlet face curved screen in the middle part of top setting.
In this way, make into sand cylinder knockout to sieve, during molding sand slides around in the middle part of sieve under leave out by mistake sand,
Preferably it is conducive to improve the uniformity that knockout is distributed in the horizontal direction, preferably to improve heat transfer effect.
As optimization, heat exchange container inner cavity upper end is additionally provided with heat exchange container dust excluding hood, and heat exchange container dust excluding hood upper end is logical
Piping is connected in cleaning shaft.
In this way, heat exchange container dust excluding hood, which can be exchanged, generates upward distinguished and admirable suction inside heat container, so that heat exchange container
Interior knockout with fluid heat transfer pipeline and dust-collecting and heat exchanging pipeline while being exchanged heat, by distinguished and admirable up band from the bottom up
Heat is walked, realizes multiple heat transfer effect, improves heat exchange efficiency；In addition, upward wind can be relied on during knockout is fallen
Stream enables tiny dust in molding sand preferably to be taken away by distinguished and admirable, realizes molding sand type selecting effect, molding sand is subsequent do not have to again into
The processing of the type selectings such as row cleaning, drying improves molding sand and handles whole efficiency.When it is implemented, heat exchange container dust excluding hood is covered in sieve
Top, the upward distinguished and admirable suction that such heat exchange container dust excluding hood generates will preferably can be shaken on sieve upwards through sieve
Molding sand in the dust that is mingled with take away, improve molding sand dust removing effects, while can also preferably cooperate with the vibration of sieve, improve
The uniformity that uniformly distributed effect of the molding sand on sieve, preferably raising molding sand fall, and then preferably improve molding sand and hold in heat exchange
Heat transfer effect in device inner cavity.
As optimization, a dedusting interlayer cavity, two dedusting interlayers are each provided at left and right sides of heat exchange container
More spaced dust-collecting and heat exchanging pipelines arranged side by side are provided with and communicated between cavity, two dedusting interlayer cavitys respectively connect outward
It passes in cleaning shaft；The left and right sides of heat exchange container is also each provided with a heat exchanging fluid interlayer cavity, two heat exchanging fluids
More spaced fluid heat transfer pipelines arranged side by side are provided with and communicated between interlayer cavity, two heat exchanging fluid interlayer cavitys are respectively
Heat exchanging fluid cooling device is connected to by pipeline outward.
Distinguished and admirable be introduced into heat exchange container inner cavity of dust pelletizing system is carried out in this way, the structure has can be well realized
It exchanges heat to improve the heat exchanger effectiveness of molding sand.Specifically, being each provided with a dedusting interlayer at left and right sides of heat exchange container
Then cavity, dedusting air-flow enter in heat exchange container inner cavity by dedusting interlayer cavity through excessive dirt heat exchange pipeline of eradicating
It exchanges heat；In conjunction with the heat exchange of more fluid heat transfer pipelines, changing for the molding sand fallen in heat exchanging container intracavity is greatlyd improve
Thermal effect.
Further, heat exchange container horizontal cross-section is rectangle, is more favorable for each interlayer cavity and dust-collecting and heat exchanging pipe in this way
The arrangement in road and fluid heat transfer pipeline improves space efficiency utilization.
Further, dedusting interlayer cavity is located on the outside of heat exchanging fluid interlayer cavity, and in the middle part of dedusting interlayer cavity
It is respectively connected in cleaning shaft outward by one in the plenum chamber of outside taper type.In this way, the plenum chamber of setting makes
Dedusting is distinguished and admirable plenum chamber can be leaned on to rectify after enter in dust-collecting and heat exchanging pipeline, reduce pneumatic noise, while it is distinguished and admirable to be conducive to dedusting
In dust sedimentation is converged in plenum chamber and dedusting interlayer cavity, be conducive to improve subsequent air-flow velocity.Dedusting interlayer
Cavity, which is set to outside, can be convenient its interior dust accumulation of setting cleaning.
Further, lower end offers dedusting cleaning door on the outside of dedusting interlayer cavity, is easy to open cleaning dust.
Further, the heat exchanging fluid interlayer cavity upper end of heat exchange container side is connected outward and is connected by upward pipeline
It is connected to heat exchanging fluid cooling device, the heat exchanging fluid interlayer cavity lower end of the heat exchange container other side is connected outward by downward pipeline
Out and it is connected to heat exchanging fluid cooling device.Facilitate the connection of pipeline to install in this way, while being conducive to the whole circulation of heat exchanging fluid
Flowing.
As optimization, the dust-collecting and heat exchanging pipeline is to be in tilted layout, and distinguished and admirable inside direction diagonally downward and pipeline
Flow direction is consistent.In this way, can prevent the dust being mingled in distinguished and admirable from accumulating in dust-collecting and heat exchanging pipeline causes blocking or drop
The low distinguished and admirable flow velocity of dedusting.
Further, the dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline be along horizontal arranged in rows, and respectively
It is correspondingly arranged to be multiple rows of, fluid heat transfer pipeline edge and the opposite direction of dust-collecting and heat exchanging pipeline along the arrangement of short transverse uniform intervals
It is in tilted layout to be formed and interlock, and every exclusion dirt heat exchange pipeline and fluid heat transfer pipeline middle position are intervening portion.In this way, pipeline
Being in tilted layout can accumulate to avoid knockout in pipeline external surface, while the pipeline of alternating inclinations arrangement can also fall to avoid guidance
Sand is migrated toward same direction, therefore can better ensure that the uniformity that molding sand falls in heat exchange container, preferably to improve heat
Exchange efficiency.
As optimization, the dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline external surface are respectively arranged at intervals with aluminum fin-stock.
The heat exchanger effectiveness with knockout can be preferably improved in this way.
Further, the aluminum fin-stock of dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline external surface respectively along pipeline front and rear sides to
Outer lug formed and be obliquely installed in the same direction with pipeline (when specific implementation aluminum fin-stock tilt angle be greater than place pipeline tilt angle with
Conducive to molding sand landing), every aluminum fin-stock for eradicating dirt heat exchange pipeline has vertical right on the staggered fluid heat transfer pipeline of correspondence
The aluminum fin-stock answered, and the vertical projection of the aluminum fin-stock lower half of each dust-collecting and heat exchanging pipeline and the corresponding layer fluid heat exchange pipeline
On aluminum fin-stock lower half vertical projection have one coincidence part.In this way aluminum fin-stock prolong front-rear direction be extended can
Heat exchanger effectiveness is also improved with the contact effect for falling molding sand to improve it, while corresponding aluminum fin-stock is erecting on adjacent pipeline
Dislocation overlapping arrangement upwards enables on the aluminum fin-stock of each dust-collecting and heat exchanging pipeline the molding sand that slides to fall to lower section corresponding
Aluminum fin-stock surface on fluid heat transfer pipeline, so that molding sand is capable of forming the successively left of class zigzag in heat exchange container inner cavity
Right deflecting is staggeredly fallen.In this way, dramatically improve residence time of the molding sand in heat exchange container, also high degree raising type
The contact heat-exchanging efficiency of sand and aluminum fin-stock, so that molding sand heat exchange cooling effect is greatly improved.
In conclusion the present invention has structure simple, low in cost, cooling effect is excellent, and molding sand cooling efficiency is high, by season
Save the advantages that temperature influence is small, and use is more stable, and adaptation environment temperature is more preferable.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of an independent heat exchange container in Fig. 1, the structural representation of display portion aluminum fin-stock in figure.
Fig. 3 is the horizontal cross of Fig. 2, does not show aluminum fin-stock structure in figure.
Fig. 4 slides the schematic diagram of process for the invention shows molding sand between aluminum fin-stock.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
When specific implementation: as shown in Figs 1-4, a kind of evaporative pattern hot sand cooling processing system, including turnover machine 1 and heat exchange dress
It sets, heat-exchanger rig includes a heat exchange container 2, and heat exchange container 2 is internally provided with the fluid heat transfer pipeline 3 for heat exchange, changes
Hot fluid pipeline 3 is connected to the heat exchanging fluid cooling device 4 being set to outside heat exchange container 2 and for the heat exchanging fluid recycle stream in it
Dynamic, 1 mould turnover direction side of turnover machine and the linking of 2 upper end sand inlet of heat exchange container, 2 lower end of heat exchange container middle part is provided with band and shakes out
The sand export 5 of switch valve；It wherein, further include dust pelletizing system, dust pelletizing system includes the dust excluding hood for being set to dedusting position, Yi Jihe
The dedusting fan 6 being connected with dust excluding hood, dust pelletizing system further include the cleaning shaft 7 being connected between dust excluding hood and dedusting fan,
Cleaning shaft includes the dust-collecting and heat exchanging pipeline 8 being set in heat exchange container inner cavity.When implementation, dedusting fan outlet side and dust removing cloth
Bag, which is connected, constitutes bag-type dust removal system.
In this way, in the present invention, a part is arranged in the distinguished and admirable pipeline of dust pelletizing system enters and form dedusting in heat exchange container
Heat exchange pipeline, can use dust-collecting and heat exchanging pipeline and molding sand carries out heat exchange, by the dedusting wind inside dust-collecting and heat exchanging pipeline
Stream takes away the heat of a part of molding sand, therefore compares with existing heat-exchanger rig, under the premise of not increasing additional heat exchange device power,
Not only dedusting is realized, but also dust pelletizing system is utilized to improve heat exchange efficiency, cleaning shaft reaches dedusting and cooling dual effect
Fruit, therefore greatly improve to molding sand heat exchange cooling effect.
Wherein, the side positioned at 1 mould turnover direction of turnover machine is correspondingly arranged on a jigging conveyer 9, and jigging conveyer 9 goes out
Mouth and the linking of heat exchange container upper end sand inlet, dust excluding hood includes the conveyer dust excluding hood being correspondingly arranged above jigging conveyer
10.Specifically, jigging conveyer includes an angularly disposed delivery chute component, delivery chute component upper end is set to turnover machine
One side-lower in mould turnover direction, vibrator is provided on delivery chute component, and delivery chute member lower is outlet, conveyer dust excluding hood
Covering is arranged above delivery chute component.
In this way, molding sand is poured into jigging conveyer by turnover machine mould turnover, exist by the delivery chute component of jigging conveyer
The conveying to molding sand is realized when vibration, so that the partial heat and dust that molding sand is mingled with can be upper well in vibration processes
Wind-force in the conveyer dust excluding hood of side siphons away, and achievees the effect that preliminary dust removal and takes away heat.Jigging conveyer is using vibration
Mode convey molding sand, the dust excluding hood that cooperation top is arranged enables to the dust being mingled in molding sand when vibration that can be shaken out
And taken away by distinguished and admirable, improve dust removing effects.
Wherein, the heat exchanging fluid in the heat exchanging fluid pipeline 3 is gaseous refrigerant, the heat exchanging fluid cooling device 4
Including concatenated compressor of air conditioner and A/C evaporator, compressor of air conditioner is used for gaseous refrigerant boil down to liquid, and air-conditioning steams
Hair device is used to convert the refrigerant of liquid to the gaseous state of low temperature.
In this way using gaseous refrigerant as heat exchanging fluid, the mode phase of the mode of this air cooling and existing conventional water cooling
Than gaseous refrigerant rapidly can cool down and take away by compressor of air conditioner and A/C evaporator in heat exchanging fluid cooling device
Heat can recycle after fast cooling, greatly improve heat exchange efficiency, in this way, being used as and changing with use cooling water
The water-cooling pattern of hot fluid is compared, and the cooling of heat exchanging fluid is influenced smaller by temperature.It is set to be particularly suitable for being difficult to fastly in cooling water
The high temperature area of prompt drop temperature processing uses.
Wherein, include the heat exchange container of a pre- colod-application heat exchange container and a cooling in the heat-exchanger rig, turn over
1 mould turnover direction side of punch-out equipment and pre- colod-application heat exchange container upper end sand inlet linking, pre- colod-application heat exchange container lower end sand export
Side is additionally provided with the bypass of outer end obliquely and goes out sandpipe 11, bypasses out sandpipe 11 and cooling heat exchange container upper end sand inlet
Linking, cooling heat exchange container lower end sand export is for shaking out to lost foam casting boxcar；In pre- colod-application heat exchange container
Heat exchanging fluid pipeline is recycled with heat exchanging fluid cooling device again after being connected to the heat exchanging fluid pipeline in cooling heat exchange container
Connection.
It is used in series in this way, using two sets of heat exchange containers arranged side by side in heat-exchanger rig, a realization pre-cooling, a realization
It is cooling, greatly improve cooling effect and cooling treatment efficiency.It when implementation, bypasses out and is also equipped with switch valve on sandpipe, make
It can single heat exchange container exclusive use.
Wherein, the charging side of heat exchange container is also vertically provided with an elevator 12 side by side in the heat-exchanger rig, mentions
It rises 12 lower end of machine to be provided with for the elevator into sand into sand hopper 13,12 upper end sand export of elevator is arranged obliquely by outer end
The sand inlet for sending sand cylinder 14 to be connected to heat exchange container upper end.
In this way, promoting laggard sand to heat exchange container using elevator, heat exchange container and turnover machine are set to together
One ground makes it be conducive to layout installation, saves space.
Wherein, elevator 12 includes vertically arranged elevator shell, and elevator shell inner cavity upper and lower ends are provided with chain
Wheel, upper end sprocket wheel and the elevator motor 15 positioned at elevator shell exterior are drivingly connected, and are arranged on the sprocket wheel of upper and lower ends
In the loop chain 16 of vertical annular, it is provided with chain bucket on loop chain 16, from elevator when chain bucket moves across after the sprocket wheel of lower end with loop chain
Sand is connect into sand hopper, sand export shakes out from elevator upper end after the sprocket wheel of upper end.Circular chain bucket hoister, Neng Gougeng are used in this way
Blocking is avoided well, guarantees that work is smooth.Existing belt elevator or steel wire rubber can also be used when implementing certainly
The existing Structure of hoist such as band bucket elevator, which are realized, to be promoted.
Wherein, 2 lower end of heat exchange container close to elevator side be additionally provided with outer end be connected to obliquely elevator into
The sand-returning pipe 17 of sand hopper is provided with back sand switch valve on sand-returning pipe 17.In this way, molding sand can be opened after exchanging heat in heat exchange container
Sand-returning pipe realizes back that sand again returns to heat exchange container and realize heat exchange to elevator, and then realizes to the cycle heat exchange of molding sand
Reason guarantees heat transfer effect until temperature is reduced to meet the requirements and turns off back sand switch valve.
Wherein, upper end sand inlet lower section adjacent is located in heat exchange container inner cavity and is horizontally arranged with vibration homocline along inner cavity
Sieve, vibrating is the heat transfer space for being provided with fluid heat transfer pipeline 3 and dust-collecting and heat exchanging pipeline 8 below equal material screen.
In this way, the uniformity of knockout distribution by equal material screen vibrating shakeout is vibrated, can be improved to improve heat transfer effect.
Wherein, vibrating equal material screen includes being transversely mounted in the middle part of heat exchange container inner cavity the arc-shaped sieve bend that raises upward
Net 18 further includes the shaker screen 19 being mounted on sieve；It is located in the heat exchange container inner cavity inside at the sand inlet of upper end
Be extended have tubular into sand cylinder 20, obliquely and the top setting of the outlet middle part of face curved screen 18 into sand cylinder 20.
In this way, make into sand cylinder knockout to sieve, during molding sand slides around in the middle part of sieve under leave out by mistake sand,
Preferably it is conducive to improve the uniformity that knockout is distributed in the horizontal direction, preferably to improve heat transfer effect.
Wherein, heat exchange container inner cavity upper end is additionally provided with heat exchange container dust excluding hood 21, and 21 upper end of heat exchange container dust excluding hood is logical
Piping is connected in cleaning shaft 7.
In this way, heat exchange container dust excluding hood, which can be exchanged, generates upward distinguished and admirable suction inside heat container, so that heat exchange container
Interior knockout with fluid heat transfer pipeline and dust-collecting and heat exchanging pipeline while being exchanged heat, by distinguished and admirable up band from the bottom up
Heat is walked, realizes multiple heat transfer effect, improves heat exchange efficiency；In addition, upward wind can be relied on during knockout is fallen
Stream enables tiny dust in molding sand preferably to be taken away by distinguished and admirable, realizes molding sand type selecting effect, molding sand is subsequent do not have to again into
The processing of the type selectings such as row cleaning, drying improves molding sand and handles whole efficiency.When it is implemented, heat exchange container dust excluding hood is covered in sieve
Top, the upward distinguished and admirable suction that such heat exchange container dust excluding hood generates will preferably can be shaken on sieve upwards through sieve
Molding sand in the dust that is mingled with take away, improve molding sand dust removing effects, while can also preferably cooperate with the vibration of sieve, improve
The uniformity that uniformly distributed effect of the molding sand on sieve, preferably raising molding sand fall, and then preferably improve molding sand and hold in heat exchange
Heat transfer effect in device inner cavity.It is located at heat transfer space lower part when implementation, in heat exchange container and is located at 5 top position of sand export and is arranged
The blast pipe 22 for thering is outer end opening to be bent upwards, so that heat exchange container dust excluding hood suction air is used so that being formed under in heat transfer space
Up distinguished and admirable takes away heat, to realize above-mentioned multiple heat transfer effect；The blast pipe being bent upwards simultaneously can be to avoid knockout
It blows out from blast pipe.
Wherein, the left and right sides of heat exchange container 2 is each provided with a dedusting interlayer cavity 23, two dedustings interlayer sky
Be provided with and communicated with more spaced dust-collecting and heat exchanging pipelines 8 arranged side by side between chamber 23, two dedustings with interlayer cavity 23 respectively to
It is connected in cleaning shaft 7 outside；The left and right sides of heat exchange container 2 is also each provided with a heat exchanging fluid interlayer cavity 24, and two
More spaced fluid heat transfer pipelines 3 arranged side by side, two heat exchanging fluids are provided with and communicated between heat exchanging fluid interlayer cavity 24
Interlayer cavity 24 is respectively connected to heat exchanging fluid cooling device 4 by pipeline outward.
Distinguished and admirable be introduced into heat exchange container inner cavity of dust pelletizing system is carried out in this way, the structure has can be well realized
It exchanges heat to improve the heat exchanger effectiveness of molding sand.Specifically, being each provided with a dedusting interlayer at left and right sides of heat exchange container
Then cavity, dedusting air-flow enter in heat exchange container inner cavity by dedusting interlayer cavity through excessive dirt heat exchange pipeline of eradicating
It exchanges heat；In conjunction with the heat exchange of more fluid heat transfer pipelines, changing for the molding sand fallen in heat exchanging container intracavity is greatlyd improve
Thermal effect.
Wherein, 2 horizontal cross-section of heat exchange container is rectangle, be more favorable for so each interlayer cavity and dust-collecting and heat exchanging pipeline and
The arrangement of fluid heat transfer pipeline improves space efficiency utilization.
Wherein, dedusting interlayer cavity 23 is located at 24 outside of heat exchanging fluid interlayer cavity, and dedusting is in interlayer cavity 23
Portion is respectively connected in cleaning shaft 7 by one in the plenum chamber 25 of outside taper type outward.In this way, the plenum chamber of setting
So that dedusting it is distinguished and admirable can lean on plenum chamber rectify after enter in dust-collecting and heat exchanging pipeline, reduce pneumatic noise, while be conducive to dedusting
Dust in distinguished and admirable converges sedimentation in plenum chamber and dedusting interlayer cavity, is conducive to improve subsequent air-flow velocity.Dedusting is used
Interlayer cavity, which is set to outside, can be convenient its interior dust accumulation of setting enabling cleaning.Meanwhile the plenum chamber of setting be smaller diameter end to
Outer taper type, can preferably with cleaning shaft linking be connected to, avoided wind section become larger suddenly generate excessively be vortexed stream
And enable dust preferably preliminary sedimentation in dedusting interlayer cavity, it enters in dust-collecting and heat exchanging pipeline and makes to avoid dust
At blocking and reduce heat exchanger effectiveness.
Wherein, dedusting offers dedusting cleaning door 26 with 23 outside lower end of interlayer cavity, is easy to open cleaning dust.
Wherein, 24 upper end of heat exchanging fluid interlayer cavity of 2 side of heat exchange container is connected outward and is connected by upward pipeline
Be connected to heat exchanging fluid cooling device 4,24 lower end of heat exchanging fluid interlayer cavity of the heat exchange container other side by downward pipeline to
It connects outside and is connected to heat exchanging fluid cooling device 4.Facilitate the connection of pipeline to install in this way, while being conducive to the entirety of heat exchanging fluid
It circulates.
Wherein, the dust-collecting and heat exchanging pipeline 8 is to be in tilted layout, and the distinguished and admirable flowing inside direction diagonally downward and pipeline
Direction is consistent.Blocking or reduction is caused to remove in this way, can prevent the dust being mingled in distinguished and admirable from accumulating in dust-collecting and heat exchanging pipeline
The distinguished and admirable flow velocity of dirt.
Wherein, the dust-collecting and heat exchanging pipeline 8 and fluid heat transfer pipeline 3 be along horizontal arranged in rows, and respectively right
Should be set as arranging along short transverse uniform intervals is multiple rows of, 3 edge of fluid heat transfer pipeline and the opposite direction of dust-collecting and heat exchanging pipeline 8
It is in tilted layout to be formed and interlock, and every exclusion dirt heat exchange pipeline and fluid heat transfer pipeline middle position are intervening portion.In this way, pipeline
Being in tilted layout can accumulate to avoid knockout in pipeline external surface, while the pipeline of alternating inclinations arrangement can also fall to avoid guidance
Sand is migrated toward same direction, therefore can better ensure that the uniformity that molding sand falls in heat exchange container, preferably to improve heat
Exchange efficiency.
Wherein, the dust-collecting and heat exchanging pipeline 8 and 3 outer surface of fluid heat transfer pipeline are respectively arranged at intervals with aluminum fin-stock 27.
The heat exchanger effectiveness with knockout can be preferably improved in this way.
Wherein, the aluminum fin-stock 27 of participation Fig. 4, dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline external surface is respectively before and after pipeline
Two sides outwardly convex formed and be obliquely installed in the same direction with pipeline (when specific implementation aluminum fin-stock tilt angle be greater than place pipeline inclination
Angle is in favor of molding sand landing), every aluminum fin-stock for eradicating dirt heat exchange pipeline has on the staggered fluid heat transfer pipeline of correspondence
Vertical corresponding aluminum fin-stock, and the vertical projection of the aluminum fin-stock lower half of each dust-collecting and heat exchanging pipeline and the corresponding layer fluid are changed
The vertical projection of the lower half of aluminum fin-stock on heat pipeline has the part of a coincidence.Aluminum fin-stock prolongs front-rear direction extension in this way
Being arranged can be improved it and also improves heat exchanger effectiveness, while corresponding aluminium on adjacent pipeline with the contact effect for falling molding sand 28
Fin vertically misplaces overlapping arrangement, and the molding sand that slides on the aluminum fin-stock of each dust-collecting and heat exchanging pipeline is fallen to down
Aluminum fin-stock surface on the corresponding fluid heat transfer pipeline in side, so that molding sand is capable of forming class in a zigzag in heat exchange container inner cavity
The deflecting of successively left and right staggeredly fall.In this way, dramatically improve residence time of the molding sand in heat exchange container, also very big journey
Degree improves the contact heat-exchanging efficiency of molding sand and aluminum fin-stock, so that molding sand heat exchange cooling effect is greatly improved.
In this way, vanishing-die casting moulding-sand enters jigging conveyer through turnover machine, in vibrating transportation when above system works
The dust preliminarily taking away heat under the distinguished and admirable suction that machine vibration and upper conveyor dust excluding hood provide and being mingled with, reaches
Preliminary dust removal and cooling effect.Then elevator of the molding sand after jigging conveyer by pre- colod-application heat exchange container enters
The heat exchange container of first preheating provides on the curved screen of heat exchange container upper end by vibration and heat exchange container dust excluding hood
Distinguished and admirable suction, take away heat and dust again；The special construction of curved screen, which combines, simultaneously vibrates and aspirates wind-force, being capable of band
Ejector half sand more uniformly slides from curved screen；By upward wind-force band when molding sand is in vacant state in dropping process
Heat is walked, is in and dust-collecting and heat exchanging pipeline and fluid heat transfer pipeline and when the aluminum fin-stock contact condition on the two surface, is carried out
Cooling is realized in heat exchange, and the cooling effect of MULTIPLE DYNAMIC has been achieved, and the pipeline that dust pelletizing system is utilized becomes cooling source
Greatly improve heat exchanger effectiveness.The special construction setting of aluminum fin-stock also improves the contact heat-exchanging effect with molding sand simultaneously.
After molding sand drops out heat transfer space downwards, can also as desired by the control to switch valve, make its from sand-returning pipe return sand to
Elevator realizes cycle heat exchange processing, until be cooled to be suitble to after open sand export again and shake out, this sample loading mode is particularly suitable for interval
Sequencing batch type molding sand cooling treatment.When needing to realize continuous processing and treating capacity is larger that single heat exchange container is caused to be unable to satisfy heat exchange
When processing, the sand-returning pipe and sand export of pre- colod-application heat exchanger can also be closed, it is opened and bypasses out second heat exchange of sandpipe connection
Container (heat exchange container of i.e. above-mentioned cooling) works together the heat exchange demand for meeting continous way processing by two heat exchange containers.
Therefore this system has heat exchange efficiency high, molding sand treating capacity is big and the characteristics of can be realized a variety of heat exchange modes.
Claims (9)
1. a kind of evaporative pattern hot sand cooling processing system, including turnover machine and heat-exchanger rig, heat-exchanger rig includes that a heat exchange is held
Device, heat exchange container are internally provided with the heat exchanging fluid pipeline for heat exchange, heat exchanging fluid pipeline and are set to outside heat exchange container
Heat exchanging fluid cooling device be connected to and the heat exchanging fluid supplied in it circulates, turnover machine mould turnover direction side is defeated by molding sand
It send device and heat exchange container upper end sand inlet to be connected, band is provided in the middle part of heat exchange container lower end and is shaked out the sand export of switch valve；Its
It is characterized in that, the heat exchanging fluid in the heat exchanging fluid pipeline is gaseous refrigerant, and the heat exchanging fluid cooling device includes string
The compressor of air conditioner and A/C evaporator of connection, compressor of air conditioner are used for gaseous refrigerant boil down to liquid, and A/C evaporator is used
In the gaseous state for converting the refrigerant of liquid to low temperature；
It is each provided with a dedusting interlayer cavity at left and right sides of heat exchange container, is connected to and sets between two dedusting interlayer cavitys
More spaced dust-collecting and heat exchanging pipelines arranged side by side are equipped with, two dedustings are respectively connected to cleaning shaft with interlayer cavity outward
It is interior；The left and right sides of heat exchange container is also each provided with a heat exchanging fluid interlayer cavity, between two heat exchanging fluid interlayer cavitys
More spaced heat exchanging fluid pipelines arranged side by side are provided with and communicated with, two heat exchanging fluid interlayer cavitys respectively pass through pipeline outward
It is connected to heat exchanging fluid cooling device.
2. evaporative pattern hot sand cooling processing system as described in claim 1, which is characterized in that further include dust pelletizing system, dedusting
System includes the dust excluding hood for being set to dedusting position, and the dedusting fan being connected with dust excluding hood, dedusting fan air outlet and is removed
Dirt cloth bag is connected, and dust pelletizing system further includes the cleaning shaft being connected between dust excluding hood and dedusting fan, and cleaning shaft includes setting
The dust-collecting and heat exchanging pipeline being placed in heat exchange container inner cavity.
3. evaporative pattern hot sand cooling processing system as claimed in claim 2, which is characterized in that positioned at turnover machine mould turnover direction
Side is correspondingly arranged on a vibration conveying mechanism into molding sand conveying device, and jigging conveyer outlet and heat exchange container upper end are into sand
Mouth linking, dust excluding hood includes the conveyer dust excluding hood being correspondingly arranged above jigging conveyer.
4. evaporative pattern hot sand cooling processing system as described in claim 1, which is characterized in that include one in the heat-exchanger rig
The heat exchange container of a pre- colod-application heat exchange container and a cooling, turnover machine mould turnover direction side and pre- colod-application heat exchange container
The linking of upper end sand inlet, pre- colod-application heat exchange container lower end sand export side are additionally provided with the bypass of outer end obliquely and go out sandpipe,
Sandpipe and cooling heat exchange container upper end sand inlet linking are bypassed out, cooling heat exchange container lower end sand export is for shaking out
To lost foam casting boxcar；The heat exchange stream in heat exchanging fluid pipeline and cooling heat exchange container in pre- colod-application heat exchange container
It is connected to again with heat exchanging fluid cooling device circulation after the connection of body pipeline.
5. evaporative pattern hot sand cooling processing system as described in claim 1, which is characterized in that exchange heat and hold in the heat-exchanger rig
The charging side of device is also vertically provided with an elevator side by side, and elevator lower end is provided with for into the elevator of sand into sand
Bucket, elevator upper end sand export pass through the sand inlet for sending sand cylinder to be connected to heat exchange container upper end that outer end is arranged obliquely.
6. evaporative pattern hot sand cooling processing system as described in claim 1, which is characterized in that be located in heat exchange container inner cavity upper
Adjacent is horizontally arranged with the equal material screen of vibration along inner cavity below the sand inlet of end, and vibrating is to be provided with heat exchanging fluid pipe below equal material screen
The heat transfer space in road and dust-collecting and heat exchanging pipeline.
7. evaporative pattern hot sand cooling processing system as described in claim 1, which is characterized in that heat exchange container inner cavity upper end is also set
It is equipped with heat exchange container dust excluding hood, heat exchange container dust excluding hood upper end is connected in cleaning shaft by pipeline.
8. evaporative pattern hot sand cooling processing system as described in claim 1, which is characterized in that the dust-collecting and heat exchanging pipeline is to incline
Tiltedly arrangement, and direction diagonally downward is consistent with the distinguished and admirable flow direction inside pipeline.
9. evaporative pattern hot sand cooling processing system as claimed in claim 8, which is characterized in that the dust-collecting and heat exchanging pipeline and change
Hot fluid pipeline outer surface is respectively arranged at intervals with aluminum fin-stock.
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| CN201710277722.5A CN107081405B (en) | 2017-04-25 | 2017-04-25 | Evaporative pattern hot sand cooling processing system |
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| Application Number | Priority Date | Filing Date | Title |
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| MY110063A (en) * | 1993-04-27 | 1997-12-31 | Mitsubishi Electric Corp | Refrigerant circulating system |
| CN2778431Y (en) * | 2005-01-07 | 2006-05-10 | 鞍钢附属企业公司烧结安装公司 | Casting hot sand treating and sand box automatic conveying system |
| JP2010121927A (en) * | 2008-10-22 | 2010-06-03 | Panasonic Corp | Cooling cycle device |
| BE1019581A3 (en) * | 2010-11-16 | 2012-08-07 | Atlas Copco Airpower Nv | DEVICE AND METHOD FOR COOLING A GAS |
| CN201906786U (en) * | 2011-01-20 | 2011-07-27 | 苏良磁 | Casting hot sand treatment system capable of saving energy and reducing emission |
| CN203245328U (en) * | 2013-05-15 | 2013-10-23 | 马鞍山市晨光高耐磨科技发展有限公司 | Boiling hot sand cooling machine |
| CN203887147U (en) * | 2014-06-13 | 2014-10-22 | 南充同俊机械制造有限公司 | Lost foam sand-conditioning double-cooler system |
| US9845980B2 (en) * | 2014-08-20 | 2017-12-19 | Lee Wa Wong | Air conditioning system with evaporative cooling system |
| CN104896982A (en) * | 2015-05-20 | 2015-09-09 | 澳柯玛股份有限公司 | Refrigeration system for cooling compressor through heat pipe |
| CN105499487A (en) * | 2015-12-30 | 2016-04-20 | 邯郸慧桥复合材料科技有限公司 | Atomization water-cooling method for expendable pattern casting sand |
| CN205519477U (en) * | 2016-03-08 | 2016-08-31 | 中机中联工程有限公司 | Old sand thermal reclamation system |
| CN107008852B (en) * | 2017-04-25 | 2019-03-15 | 重庆钢铁(集团)有限责任公司 | Molding sand heat exchange processing system |
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