CN112916848A - Aluminum alloy lost foam casting system - Google Patents
Aluminum alloy lost foam casting system Download PDFInfo
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- CN112916848A CN112916848A CN202110104469.XA CN202110104469A CN112916848A CN 112916848 A CN112916848 A CN 112916848A CN 202110104469 A CN202110104469 A CN 202110104469A CN 112916848 A CN112916848 A CN 112916848A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D47/00—Casting plants
- B22D47/02—Casting plants for both moulding and casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
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- 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
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
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- 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
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
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- 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
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
- B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry
Abstract
The application relates to the technical field of lost foam casting, in particular to an aluminum alloy lost foam casting system which has the technical scheme that the system comprises a sand box, wherein a gas collection box is arranged outside the sand box, the wall of the gas collection box is hollow, and the gas collection box is sleeved on the sand box; the bottom of the sand box is provided with a plurality of exhaust holes, the bottom surface inside the gas collection box is provided with a plurality of air suction holes which are in one-to-one correspondence with the exhaust holes, and the sand box is communicated with the inside of the box wall of the gas collection box; an air exhaust hopper communicated with the interior of the box wall of the gas collection box is arranged on the box wall of the gas collection box, and activated carbon is arranged at the port of the air exhaust hopper close to the gas collection box; one end of the air suction hopper, which is far away from the air collection box, is connected with a negative pressure fan; a sand separation plate is laid at the bottom of the sand box and is made of high-temperature-resistant breathable materials; the purposes that harmful gas formed by model gasification directly enters the atmosphere without being treated is reduced, the pollution to the atmospheric environment is reduced, and the adverse effect on the health of workers is reduced are achieved.
Description
Technical Field
The application relates to the technical field of lost foam casting, in particular to an aluminum alloy lost foam casting system.
Background
The lost foam casting is also called dry sand full mold negative pressure casting, and is one of the most advanced casting processes in the world at present, the method firstly makes foam plastic model according to the technological requirements, coats special high temperature resistant coating, puts in special sand box after drying, then fills in molding sand and vibrates and compacts according to the technological requirements, then casts metal liquid into the sand box to make the model gasified and disappear, the metal liquid replaces the model, and the casting which is the same as the foam plastic model is copied.
The invention discloses an aluminum alloy lost foam casting production line which is disclosed in Chinese patent with the publication number of CN106513658B, and comprises a sand box automatic circulation line, wherein a plurality of box carrying trolleys which move along a conveying line and are used for carrying sand boxes are arranged on the sand box automatic circulation line; the box carrying trolley sequentially passes through a bottom sand adding station, a model cluster placing station, a sand filling station, a pouring station, a workpiece discharging station and a shakeout station on the conveying line through a servo box pushing system, and then casting molding of the casting is completed and the required aluminum alloy casting is produced.
In view of the above-mentioned related art solutions, the inventors found that: this lost foam casting production line lacks the processing procedure of harmful gas, and in the in-process that metal liquid and model take place the replacement, the model can take place to gasify and form a large amount of harmful gas, can cause the pollution to the factory environment like this to cause the influence to workman's healthy.
Disclosure of Invention
In order to reduce the harmful gas that the model gasification formed and directly get into the atmosphere untreated, and then reduce the pollution to the atmospheric environment and reduce the harmful effects to workman's health, this application provides an aluminum alloy lost foam casting system.
The application provides an aluminum alloy lost foam casting system adopts following technical scheme:
an aluminum alloy lost foam casting system comprises a sand box, wherein a gas collection box is arranged outside the sand box, the wall of the gas collection box is hollow, and the gas collection box is sleeved on the sand box; the bottom of the sand box is provided with a plurality of exhaust holes, the bottom surface inside the gas collection box is provided with a plurality of air suction holes which are in one-to-one correspondence with the exhaust holes, and the sand box is communicated with the inside of the box wall of the gas collection box; an air exhaust hopper communicated with the interior of the box wall of the gas collection box is arranged on the box wall of the gas collection box, and activated carbon is arranged at the port of the air exhaust hopper close to the gas collection box; one end of the air suction hopper, which is far away from the air collection box, is connected with a negative pressure fan; and a sand separation plate is laid at the bottom of the sand box and is made of high-temperature-resistant breathable material.
By adopting the technical scheme, the sand is buried in the sand box to fill the box so as to lay a layer of bottom sand at the bottom of the sand box, then the model cluster is put on the bottom sand in the sand box, then the molding sand is continuously added into the sand box until the model cluster is completely covered and submerged, and dust is generated in the sand box in the process; in addition, when the metal liquid is replaced with the model foam, the model volatilizes and generates a large amount of toxic gas; the negative pressure fan produces negative pressure in the gas collection box through the gas suction hopper, and the gas collection box and the interior of the sand box are communicated with each other through the one-to-one correspondence of the exhaust holes and the air suction holes, so that negative pressure is formed in the sand box; after the sand box is filled with the molding sand, gaps still exist among the molding sand particles, at the moment, dust and toxic gas generated by model volatilization enter the gas collecting box through the exhaust holes and the air suction holes in sequence and flow towards the direction of the air exhaust hopper, the dust and part of harmful components in the gas are adsorbed by activated carbon in the process, the gas in the sand box is further subjected to certain purification treatment to reduce the toxicity of the gas, the gas subjected to primary purification is pumped to the atmosphere by a negative pressure fan, so that the harmful gas formed by model gasification directly enters the atmosphere without treatment, the pollution to the atmospheric environment is reduced, the adverse effect on the health of workers is reduced, the gas is pumped away, the pores in metal solution can be reduced, and the processing quality of castings is improved; on the other hand, the downward negative pressure is generated in the sand box, so that the molding sand particles in the sand box are more firmly squeezed together, and the possibility of collapse in the casting process of the casting mold can be reduced; the sand separating plate can prevent the molding sand in the sand box from being sucked into the gas collecting box by negative pressure to cause the blockage of the exhaust hole or the suction hole.
Preferably, one end of the air exhaust hopper, which is far away from the gas collection box, is connected with a first air inlet pipe, one side of the air exhaust hopper is provided with a closed dust removal box, and the first air inlet pipe extends towards the interior of the dust removal box; a pipe orifice of the first air inlet pipe is provided with a dust removal bag positioned in the dust removal box, the dust removal bag is communicated with the inside of the first air inlet pipe, and the dust removal bag can enable air to pass through and block dust; the negative pressure fan is arranged outside the dust removal box and is connected with a second air inlet pipe, and the second air inlet pipe extends towards the interior of the dust removal box and is communicated with the interior of the dust removal box; the exhaust port of the negative pressure fan is connected with an air outlet pipe communicated with the outside atmosphere.
Through adopting above-mentioned technical scheme, negative pressure fan passes through the second intake pipe and produces the negative pressure in dust removal incasement portion, the inside air current that also produces from the air extraction fill flow direction dust removal incasement portion of first dust removal this moment, still there is some dust impurity that fails to be adsorbed the getting rid of from the air current through the active carbon in the air current, the air current that is doped with dust impurity blows up the dust bag, the dust bag is bloated and carries out further purification and filtration to the dust impurity in the air current, namely gas can enter into the second intake pipe through the dust bag, and dust impurity in the air current is then blocked and the adhesion on the internal surface of dust bag, gas after secondary filter evolution is by the negative pressure fan suction to the outlet duct in and arrange to external atmospheric environment through the outlet duct, further reduced the dust impurity that arranges to the waste gas in the atmosphere like this, further reduced the pollution to atmosphere.
Preferably, the device also comprises a station conveyor belt, and the sand box and the air collecting box can be placed on the station conveyor belt; a coating box with an upward opening is arranged on one side of the station conveyor belt, and a lost foam coating is stored in the coating box; a pressing plate and a first driving piece for driving the pressing plate to move towards or away from the inner direction of the paint tank are arranged above the paint tank.
By adopting the technical scheme, a worker puts a model semi-finished product of the lost foam paint to be painted into the paint box, the model semi-finished product floats at the box opening of the paint box due to the fact that the model density is smaller than the paint density, the first driving piece is started at the moment, the first driving piece drives the pressing plate to move downwards, namely in the direction close to the model semi-finished product of the lost foam paint to be painted, the pressing plate price model semi-finished product is pressed into the paint in the paint box until the model semi-finished product is completely immersed in the paint, the first driving piece is started reversely at the moment so that the pressing plate moves upwards until the model semi-finished product floats out of the paint liquid level, and then the painting of the lost foam paint of the model semi.
Preferably, a fan is arranged on one side of the coating box, which is far away from the station conveyor belt, and the fan supplies air towards the direction of the station conveyor belt at the box opening of the coating box; two sides of one end, close to the station conveyor belt, of the coating box are respectively provided with a first clamping plate and a second clamping plate, and the first clamping plates are arranged on the first transfer frame; the second clamping plate is provided with a clamping hydraulic cylinder which is used for driving the second clamping plate to move towards the direction close to the first clamping plate so as to clamp the model; the transfer frame and the clamping hydraulic cylinder are both provided with a lifting hydraulic cylinder, and the lifting hydraulic cylinder can drive the first clamping plate and the second clamping plate to move upwards or downwards; a first screw rod and a first slide rail are arranged on two sides of the coating box, a first nut matched with the first screw rod is arranged on the first screw rod, and the first nut is connected with the first slide rail in a sliding manner; the first screw rod is provided with a second driving piece for driving the first screw rod to rotate around the axis of the first screw rod; the two lifting hydraulic cylinders are respectively arranged on the corresponding first nuts.
By adopting the technical scheme, after the semi-finished product of the model is painted with the paint, the fan is started to blow air in the direction of the fan facing the station conveyor belt, the model is blown between the first clamping plate and the second clamping plate, and at the moment, the clamping hydraulic cylinder is started to enable the second clamping plate to move in the direction close to the first clamping plate until the second clamping plate and the first clamping plate clamp the semi-finished product of the model; at the moment, the two lifting hydraulic cylinders are started simultaneously, and the first clamping plate and the second clamping plate further drive the model semi-finished product to move upwards until the model semi-finished product moves to be directly above the paint box; and then, the second driving piece is started to enable the first screw rod to rotate around the axis of the first screw rod in a fixed-axis mode, and the first nut further moves along the axis of the first screw rod on the first slide rail in the direction far away from the paint box, so that the painted model semi-finished product is automatically taken out, workers do not need to perform the operation, and the labor intensity is reduced to a certain extent.
Preferably, a drying conveyor belt and a drying box are arranged at one end, close to the station conveyor belt, of the coating box, the first lead screw extends towards one end, close to the coating box, of the drying conveyor belt, and the first clamping plate and the second clamping plate can move to the position above one end, close to the coating box, of the drying conveyor belt; the drying conveyor belt extends in a snake shape towards the drying box, and one end of the drying conveyor belt, which is far away from the coating box, extends towards one side direction close to the station conveyor belt; the drying box is internally provided with a plurality of drying lamp tubes, and the temperature in the drying box is maintained at 45-55 ℃.
By adopting the technical scheme, the first clamping plate and the second clamping plate move towards the direction close to the drying box until the semi-finished model product moves to one end of the drying conveyor belt close to the coating box, the lifting hydraulic cylinder is started reversely at the moment until the semi-finished model product descends to the drying conveyor belt, and then the clamping hydraulic cylinder is started reversely to enable the second clamping plate and the first clamping plate to loosen the semi-finished model product; after that, the drying conveyor belt is started, the drying conveyor belt conveys the painted model semi-finished product to the inside of the drying box, the temperature of the inside of the drying box dries the paint to be dried on the surface of the model semi-finished product until the paint on the surface of the model semi-finished product is dried, then the model can be put into production for use, and the drying conveyor belt conveys the model to the direction of the station conveyor belt for metal casting.
Preferably, a box pouring plate is arranged at one section of the station conveyor belt, and the height of the box pouring plate is lower than that of the upper surface of the station conveyor belt; a vertically arranged box reversing hydraulic cylinder is arranged below one end, close to the station conveyor belt, of the box reversing plate, and a piston rod of the box reversing hydraulic cylinder is hinged with the lower surface of the box reversing plate; the lower surface of one end, away from the station conveyor belt, of the box reversing plate is provided with a box reversing support, the box reversing plate can slide on the box reversing support, and one end, away from the station conveyor belt, of the box reversing plate can move towards one end, close to or far away from the station conveyor belt, on the box reversing support; and a collecting barrel with an upward opening is arranged at one end of the box pouring plate, which is far away from the station conveyor belt.
By adopting the technical scheme, after a casting in the sand box is solidified, the station conveyor belt is started, the station conveyor belt drives the sand box to move towards the direction close to the box pouring plate and conveys the sand box to the box pouring plate, the box pouring hydraulic cylinder is started at the moment, a piston rod of the box pouring hydraulic cylinder moves upwards and jacks up one end, close to the station conveyor belt, of the box pouring plate, one end, far away from the station conveyor belt, of the box pouring plate moves towards the direction close to the station conveyor belt on the box pouring support, one end, far away from the collecting barrel, of the sand box is further jacked up along with the end until the sand box is poured, the molding sand in the sand box enters the collecting barrel and is collected by the collecting barrel at the moment, the casting in the sand box is also poured out of the sand box, and; the whole process does not need the workman to take off the sand box and take out the molding sand and foundry goods from the sand box through the manual work, has replaced the manpower like this to take out the inside molding sand of sand box and foundry goods, and then reduces the intensity of labour that the molding sand was retrieved.
Preferably, a guide frame is arranged at one end, close to the box pouring plate, of the station conveyor belt, the guide frame inclines downwards along the direction from close to the station conveyor belt to far away from the station conveyor belt, the upper end of the guide frame is flush with the upper surface of the station conveyor belt, and the lower end of the guide frame is flush with the upper surface of the box pouring plate; a plurality of guide rollers are arranged on the guide frame, and the axes of the guide rollers are vertical to the extending direction of the guide frame; the two ends of the guide roller are rotatably connected with the two sides of the guide frame.
By adopting the technical scheme, when the sand box is conveyed onto the box reversing plate by the station conveyor belt, the sand box firstly passes through the guide frame and slides onto the box reversing plate through self weight on the guide frame, so that the station transfer of the sand box is more stable; the guide roller can make the movement of the sand box smoother on one hand, and can reduce the abrasion of the bottom surface of the sand box on the other hand.
Preferably, a first filter screen is arranged at a position, close to the bucket opening, of the collecting bucket, and the mesh size of the first filter screen is larger than the size of the molding sand agglomerates and can prevent the castings from entering the collecting bucket; the bottom of the collecting barrel is provided with a plurality of crushing screw shafts extending towards the inside of the collecting barrel, the lower ends of the crushing screw shafts penetrate through the bottom of the collecting barrel and are in rotary connection with the collecting barrel, and the crushing screw shafts can rotate around the axes of the crushing screw shafts in the collecting barrel in a fixed-axis mode.
By adopting the technical scheme, because the casting in the sand box and the molding sand are poured out of the sand box together in the pouring process of the sand box, the first filter screen is arranged, so that the casting can be prevented from entering the collecting barrel along with the molding sand, namely, the casting can be left at the box opening of the sand box, and the casting can be conveniently picked up by workers; in addition, in the casting process, a part of metal waste blocks with fragile structures can be generated in the sand box, and the filter screen can prevent the metal waste blocks from entering the collecting barrel along with the molding sand, so that the recovered molding sand is filtered, and the purity of the molding sand to be recovered is improved; inside back of collecting vessel is poured into to the molding sand in the sand box, and rotatory crushing screw axis drives the molding sand and rolls and by the breakage in collecting vessel is inside, and the great molding sand caking of volume can be smashed into the molding sand granule that satisfies the operation requirement like this.
Preferably, a supporting plate and a sand adding box with an upward opening are arranged above the station conveyor belt, and the sand box can move on the station conveyor belt to be right below the sand adding box; the sand adding box is arranged on the support plate and can reciprocate on the support plate; a plurality of sand outlets are formed through the bottom of the sand adding box, a plurality of sand blocking holes with the same diameter as the sand outlets are formed through the supporting plate, and the distribution of the sand blocking holes on the supporting plate is the same as that of the sand outlets at the bottom of the sand adding box; along with the motion of the sand adding box on the supporting plate, the sand blocking hole and the sand outlet hole can be staggered with each other.
Through adopting above-mentioned technical scheme, convey the sand box to the back with the sand box below when the station conveyer belt, it is in the state of coincidence to hinder the sand hole this moment with the sand outlet, the molding sand that adds the sand incasement portion promptly passes through the sand outlet and hinders the sand hole from adding the sand incasement portion outflow and reach the sand box below inside the backup pad, after the inside molding sand that is full of sand box, make and add the sand box and remove in the backup pad until the sand outlet with hinder the sand hole and take place the dislocation completely, the backup pad is stopped up the sand outlet this moment, and then the inside molding sand of hindering the sand box constantly flows into the sand box.
Preferably, the bottom of the collecting barrel is provided with a sand discharging port; a molding sand conveyor belt group is arranged below the collecting barrel, and one end of the molding sand conveyor belt group, which is far away from the collecting barrel, extends to the top of the sand adding box; and a second filter screen is arranged at the box opening of the sand adding box, and the mesh size of the second filter screen is smaller than that of the first filter screen.
By adopting the technical scheme, the molding sand entering the collecting barrel falls onto the molding sand conveyor belt group through the sand discharge port after being crushed, and the molding sand conveyor belt group further discharges the molding sand into the sand adding box again, so that the molding sand is automatically recycled, and the workload of adding the molding sand into the sand adding box is reduced to a certain extent; the molding sand that the second filter screen can be organized the molding sand on carries out further filtration to filter still remaining great molding sand caking of volume in the molding sand after smashing, with the possibility that the sand outlet hole was blockked up in the reduction molding sand caking.
In summary, the present application has the following technical effects:
1. by arranging the gas collection box, the gas extraction hopper, the active carbon and the negative pressure fan, on one hand, harmful gas formed by model gasification is prevented from directly entering the atmosphere without being treated, so that the pollution to the atmospheric environment is reduced, and the adverse effect on the health of workers is reduced; on the other hand, the downward negative pressure is generated in the sand box, so that the molding sand particles in the sand box are more firmly squeezed together, and the possibility of collapse in the casting process of the casting mold can be reduced;
2. the coating box, the pressing plate, the first driving piece, the first clamping plate, the second clamping plate, the fan, the drying box, the drying lamp tube and the drying conveyor belt are arranged, so that the automation of painting and stripping of a model semi-finished product and drying of a coating is realized, and the labor intensity of processing the model semi-finished product into a model which can be put into use is reduced to a certain extent;
3. through having set up station conveyer belt, the board of falling the case, the pneumatic cylinder of falling the case and collecting vessel, whole process does not need the workman to take off the sand box and take out the molding sand and foundry goods from the sand box through the manual work, has replaced the manpower like this to take out the inside molding sand of sand box and foundry goods, and then has reduced the intensity of labour that the molding sand was retrieved.
Drawings
Fig. 1 is an overall structural view of a lost foam casting system in an embodiment of the present application;
FIG. 2 is an overall configuration diagram of an exhaust gas treatment mechanism and a sand shower mechanism in an embodiment of the present application;
FIG. 3 is an overall view of the exhaust treatment mechanism and the deluge mechanism from another perspective in an embodiment of the present application;
fig. 4 is an overall configuration diagram at the coating mechanism and the drying mechanism in the embodiment of the present application;
FIG. 5 is an overall block diagram of the coating mechanism and the drying mechanism in another perspective in an embodiment of the present application;
fig. 6 is an overall structural view of the pouring mechanism and the sand crushing mechanism in the embodiment of the present application;
fig. 7 is an overall configuration view of the pouring mechanism and the sand crushing mechanism in another perspective in the embodiment of the present application.
In the figure, 1, a sand box; 11. an exhaust hole; 2. a station conveyor belt; 3. an exhaust gas treatment mechanism; 31. a gas collection tank; 311. a suction hole; 312. a vent; 32. an air extraction hopper; 33. activated carbon; 34. a negative pressure fan; 35. a sand-separating plate; 36. a secondary purification component; 361. a first intake pipe; 362. a dust removal box; 363. a second intake pipe; 364. an air outlet pipe; 367. a dust removal bag; 4. a coating mechanism; 41. a soaking component; 411. a paint tank; 412. pressing a plate; 413. a pressure plate hydraulic cylinder; 42. a transfer assembly; 421. a first splint; 422. a lifting hydraulic cylinder; 423. a first lead screw; 424. a first nut; 425. a first slide rail; 426. a second splint; 427. clamping a hydraulic cylinder; 428. a transfer frame; 429. a first motor; 430. a fan; 5. a drying mechanism; 51. a drying box; 52. drying the lamp tube; 53. drying the conveyor belt; 6. a box reversing mechanism; 61. a box pouring plate; 62. a box reversing hydraulic cylinder; 63. a box reversing bracket; 64. a guide frame; 65. a guide roller; 66. a slide plate; 7. a molding sand crushing mechanism; 71. a collection barrel; 711. a sand discharge port; 72. a crushing screw shaft; 73. a driving wheel; 74. a synchronous belt; 75. a second motor; 76. a first filter screen; 8. a deluge sand adding mechanism; 81. adding a sand box; 811. a sand outlet; 82. a support plate; 821. a sand blocking hole; 83. a support; 84. a drive assembly; 841. a third motor; 842. a second nut; 843. a second lead screw; 844. a slider; 845. a second slide rail; 85. a second filter screen; 9. a sand belt set.
Detailed Description
Referring to fig. 1, the application provides an aluminum alloy lost foam casting system, which comprises a station conveyor belt 2, an exhaust gas treatment mechanism 3 capable of purifying and dedusting exhaust gas and discharging the exhaust gas out of a room, and a sand box 1 which can be placed on the station conveyor belt 2 and has an upward opening; a coating mechanism 4 and a drying mechanism 5 are arranged on one side of the station conveyor belt 2, the coating mechanism 4 can automatically brush the coating on the model semi-finished product to be brushed with the coating and automatically send the brushed model semi-finished product to the drying mechanism 5, and the drying mechanism 5 can dry the model semi-finished product and send the dried model which can be put into use to one side of the station conveyor belt 2 for the aluminum alloy evanescent film casting process; a box pouring mechanism 6 and a molding sand crushing mechanism 7 are arranged at one end of the station conveyor belt 2, a rain sand adding mechanism 8 is arranged above the station conveyor belt 2, and the sand box 1 can be placed under the rain sand adding mechanism 8; before the molten metal pouring is carried out, the rain-spraying sand adding mechanism 8 is used for burying sand and filling the interior of the sand box 1 so as to lay a layer of bottom sand at the bottom of the sand box 1, then the model cluster is placed on the bottom sand in the sand box 1, and then the molding sand is continuously added into the sand box 1 until the model cluster is completely covered and submerged; the metal liquid pouring is accomplished and the back that solidifies, and on station conveyer belt 2 sent sand box 1 to pouring mechanism 6, pouring mechanism 6 made sand box 1 take place to empty and then make the molding sand in sand box 1 fall to the broken mechanism 7 of molding sand in, the molding sand caking is then smashed into by broken mechanism 7 of molding sand and is become the molding sand granule that can be used once more.
Referring to fig. 1 and 2, the exhaust gas treatment mechanism 3 includes a gas collection tank 31 sleeved outside the sand box 1, and the top surface of the gas collection tank 31 and the side surface close to the box reversing mechanism 6 are provided with openings; three side walls and the bottom surface of the gas collection box 31 are all of a structure which is hollow and closed inside; a plurality of exhaust holes 11 are formed in the bottom surface of the sand box 1, and the exhaust holes 11 are uniformly distributed in a rectangular array; the inner bottom surface of the gas collection box 31 is provided with a plurality of air suction holes 311 which are in one-to-one correspondence with the corresponding exhaust holes 11, the air suction holes 311 penetrate through the inner bottom surface of the gas collection box 31 and are communicated with the hollow box wall of the gas collection box 31, and the outer bottom surface of the gas collection box 31 is sealed, so that the inner wall of the gas collection box 31 is communicated with the inside of the sand box 1; a plurality of air vents 312 are formed in the outer box wall of the air collection box 31, which is far away from the coating mechanism 4, the air vents 312 penetrate through the outer box wall of the air collection box 31 and are communicated with the hollow box wall of the air collection box 31, and the side wall of the inner part of the air collection box 31 is closed; an air suction hopper 32 is arranged on one side of the air collection box 31 far away from the coating mechanism 4, the end of the air suction hopper 32 can be attached to the outer wall of the air collection box 31 and is communicated with the interior of the box wall of the air collection box 31 through an air vent 312, and thus the air suction hopper 32 is indirectly communicated with the interior of the sand box 1; the air extracting hopper 32 is detachably connected with the air collecting box 31; the inlet of the air extraction hopper 32 is provided with active carbon 33; and a secondary purification component 36 is arranged at one end of the air suction hopper 32 far away from the air collection box 31, and the secondary purification component 36 is connected with a negative pressure fan 34 indirectly communicated with the air suction hopper 32.
A large amount of dust is generated during the process of adding the molding sand into the flask 1, and the dust tends to escape to the outside of the flask 1; in addition, when the metal liquid is replaced with the model foam, the model made of the plastic foam material is volatilized and gasified to generate a large amount of toxic gas; in the process of sand filling and molten metal pouring of the sand box 1, the negative pressure fan 34 is started, the negative pressure fan 34 further generates negative pressure to the interior of the sand box 1 through the secondary purification component 36, the air extraction hopper 32, the activated carbon 33, the air vent 312, the hollow box wall of the air collection box 31, the air suction hole 311 and the exhaust hole 11 in sequence, so that air flow from top to bottom is generated in the interior of the sand box 1 due to the negative pressure, on one hand, the air flow can prevent dust impurities from escaping upwards to the exterior of the sand box 1 to further pollute the indoor air environment, and on the other hand, part of the dust impurities can be sucked into the air extraction; on the other hand, after the sand box 1 is filled with the molding sand, gaps still exist among the molding sand particles, and at the moment, dust and toxic gas generated by model volatilization enter the gas collection box 31 through the exhaust holes 11 and the suction holes 311 in sequence and flow towards the direction of the air exhaust hopper 32; thus, the air flow which continuously flows to the air exhaust hopper 32 is doped with dust impurities and harmful gas, when the air flow flows through the active carbon 33, the active carbon 33 can adsorb a large amount of dust impurities and toxic substances, so that the harmful gas formed by model gasification directly enters the atmosphere without treatment, the pollution to the atmospheric environment is reduced, and the adverse effect on the health of workers is reduced; on the other hand, the toxic gas is pumped away, so that air holes generated in the metal solution can be reduced, the processing quality of castings is further improved, downward negative pressure is generated inside the sand box 1, and the molding sand particles inside the sand box 1 are firmly extruded together, so that the possibility of collapse in the casting process of the casting mold can be reduced; when the sand box 1 needs to be moved, the air suction hopper 32 is detached from the air collection box 31.
Furthermore, the bottom of the sand box 1 is provided with a sand separation plate 35 which can prevent the sand particles from passing through, and the sand separation plate 35 can allow dust and impurities to pass through; the sand-separating plate 35 can prevent the molding sand in the sand box 1 from being drawn into the air-collecting tank 31 by negative pressure to cause the air-discharging holes 11 or the air-sucking holes 311 to be blocked.
Referring to fig. 2 and 3, the secondary purification assembly 36 includes a first air inlet pipe 361 communicated with one end of the air suction hopper 32 far from the air collection box 31, and one end of the first air inlet pipe 361 far from the air suction hopper 32 extends to the ground and is horizontally arranged; a dust removal box 362 with a closed interior is arranged on one side of the air suction hopper 32 away from the gas collection box 31, and one end, away from the air suction hopper 32, of the first air inlet pipe 361 penetrates through the box wall of the dust removal box 362 and extends towards the interior of the dust removal box 362; one end of the first air inlet pipe 361, which is far away from the air suction hopper 32, is sealed, a plurality of dust removing bags 367 which are downward opened and communicated with the interior of the first air inlet pipe 361 are fixed on the peripheral wall of the first air inlet pipe 361, and the dust removing bags 367 are arranged in the dust removing box 362; one side of the dust removing box 362 far away from the air suction hopper 32 is provided with a second air inlet pipe 363 communicated with the inside of the dust removing box 362, one end of the second air inlet pipe 363 connected with the dust removing box 362 is arranged near the top of the dust removing box 362, the other end of the second air inlet pipe 363 is connected with an air inlet port of the negative pressure fan 34, an air outlet port of the negative pressure fan 34 is connected with an air outlet pipe 364, and the air outlet pipe 364 is communicated with the external atmosphere.
The air current after the preliminary purification and dust removal of the activated carbon 33 is pumped into the first air inlet pipe 361, and flows to the inside of the dust removing bag 367 through the first air inlet pipe 361, the dust removing bag 367 is raised due to the effect of the air current, the dust removing bag 367 further purifies and filters dust impurities in the air current, namely, the air can enter the second air inlet pipe 363 through the dust removing bag 367, the dust impurities in the air current are blocked and adhered to the inner surface of the dust removing bag 367, the air after the secondary filtration and evolution is pumped into the air outlet pipe 364 by the negative pressure fan 34 and is discharged into the external atmosphere environment through the air outlet pipe 364, so that the dust impurities contained in the waste gas discharged into the atmosphere are further reduced, and the pollution to the atmosphere is further reduced.
Referring to fig. 1 and 4, the coating mechanism 4 includes a soaking assembly 41 and a transferring assembly 42 capable of transferring the mold semi-finished product after coating is finished to the drying mechanism 5; the soaking assembly 41 comprises a coating box 411 arranged on one side of the station conveyor belt 2 far away from the air suction hopper 32, and an opening of the coating box 411 is upwards provided and stores the lost foam casting coating; a horizontal pressing plate 412 and a first driving piece capable of driving the pressing plate 412 to move towards or away from the interior of the paint tank 411 are arranged right above the paint tank 411, the first driving piece adopts a vertically arranged pressing plate 412 hydraulic cylinder, and a piston rod of the pressing plate 412 hydraulic cylinder is fixedly connected with the upper surface of the pressing plate 412; when the model semi-finished product of the paint to be painted needs to be painted, the model semi-finished product is placed in the paint box 411 and placed under the pressing plate 412, the model semi-finished product floats on the surface of the paint due to the fact that the density of the model semi-finished product is smaller than that of the paint, the pressing plate 412 is started to enable the pressing plate 412 to move downwards until the model overcomes buoyancy and is completely immersed in the paint so that the paint is completely adhered to the surface of the model semi-finished product, the pressing plate 412 is started to move upwards in a reverse mode after a period of time, and the painted model semi-finished product floats out of the liquid level of the paint.
Referring to fig. 4 and 5, the transfer assembly 42 includes a first clamping plate 421 and a second clamping plate 426 disposed opposite to each other, wherein the first clamping plate 421 and the second clamping plate 426 are both vertically disposed and respectively disposed near both sides of the paint tank 411; a clamping hydraulic cylinder 427 capable of driving the second clamping plate 426 to move towards or away from the first clamping plate 421 is arranged on the side, away from the first clamping plate 421, of the second clamping plate 426, the clamping hydraulic cylinder 427 is horizontally arranged, and a piston rod of the clamping hydraulic cylinder 427 is fixedly connected with the surface, away from the second clamping plate 426, of the first clamping plate 421; a horizontally arranged transfer frame 428 is fixed on one side of the first clamping plate 421 away from the second clamping plate 426; the transfer frame 428 and the clamping hydraulic cylinders 427 are both provided with vertical lifting hydraulic cylinders 422, piston rods of the lifting hydraulic cylinders 422 extend vertically upwards, and the upper ends of the piston rods of the two clamping hydraulic cylinders 427 are fixedly connected with the transfer frame 428 or the clamping hydraulic cylinders 427 respectively; a first screw rod 423 and a first slide rail 425 which are horizontally arranged are arranged below the two lifting hydraulic cylinders 422, the first screw rod 423 is arranged in the first slide rail 425, and two ends of the first screw rod 423 are rotatably connected with two ends of the first slide rail 425; a first nut 424 matched with the first screw 423 is arranged on the first screw 423, the first nut 424 is in sliding connection with a first sliding rail 425, and a lifting hydraulic cylinder 422 is fixed on the first nut 424; one end of the first screw 423 is provided with a second driving piece for driving the first screw 423 to rotate around the self axis in a fixed shaft manner, the second driving piece adopts a first motor 429 fixed on a first sliding rail 425, and an output shaft of the first motor 429 is coaxially and fixedly connected with the first screw 423; the end of the paint tank 411 remote from the drying mechanism 5 is provided with a fan 430, and the fan 430 is capable of blowing an air flow toward the station conveyor 2.
Referring to fig. 4 and 5, after the paint application of the mold half-finished product is completed, the fan 430 is activated to blow air in the direction of the drying mechanism 5 by the fan 430, the mold is blown between the first clamping plate 421 and the second clamping plate 426, and the clamping hydraulic cylinder 427 is activated to move the second clamping plate 426 in the direction close to the first clamping plate 421 until the second clamping plate 426 and the first clamping plate 421 clamp the mold half-finished product; at this time, the two lifting hydraulic cylinders 422 are started simultaneously, and the first clamp plate 421 and the second clamp plate 426 further drive the model semi-finished product to move upwards until the model semi-finished product moves to be above the paint tank 411; then, the second driving member is started to make the first screw rod 423 rotate around the axis thereof in a fixed axis manner, and the first nut 424 further moves along the axis of the first screw rod 423 on the first slide rail 425 in a direction away from the paint box 411, so that the painted model semi-finished product is automatically taken out without the need of workers for the operation, and the labor intensity is reduced to a certain extent.
Referring to fig. 1 and 4, the drying mechanism 5 includes a drying conveyor belt 53 disposed on a side of the paint tank 411 close to the station conveyor belt 2, and a drying tank 51, wherein the drying conveyor belt 53 is disposed inside the drying tank 51 and has a serpentine shape; one end of the drying conveyor 53 extends to one side of the paint tank 411, and the first screw 423 extends from one side of the paint tank 411 to one side of the drying conveyor 53, that is, the first clamp 421 and the second clamp 426 can transfer the model semi-finished product to the upper side of the drying conveyor 53; the other end of the drying conveyor belt 53 extends to one side of the station conveyor belt 2; a plurality of drying lamp tubes 52 are fixed inside the drying box 51, and the temperature inside the drying box 51 is maintained at 45-55 ℃; the first nut 424 indirectly drives the first clamping plate 421 and the second clamping plate 426 to move towards two sides of the drying conveyor belt 53 until the semi-finished model moves onto the drying conveyor belt 53, at this time, the lifting hydraulic cylinder 422 is reversely started, the lifting hydraulic cylinder 422 drives the first clamping plate 421 and the second clamping plate 426 to move downwards until the semi-finished model descends onto the drying conveyor belt 53, and then the clamping hydraulic cylinder 427 is reversely started to make the second clamping plate 426 move towards a direction far away from the first clamping plate 421 until the second clamping plate 426 and the first clamping plate 421 loosen the semi-finished model; after that, the drying conveyor belt 53 is started, the drying conveyor belt 53 conveys the painted model semi-finished product to the inside of the drying box 51, the temperature inside the drying box 51 dries the paint to be dried on the surface of the model semi-finished product until the paint on the surface of the model semi-finished product is dried, the model becomes a model which can be put into production and use, and the drying conveyor belt 53 conveys the model to the direction of the station conveyor belt 2 for casting.
Referring to fig. 1 and 6, the box inverting mechanism 6 includes a box inverting plate 61 in a horizontal state at an initial position, and the height of the box inverting plate 61 is lower than the upper surface of the station conveyor 2; a box reversing hydraulic cylinder 62 fixed on the ground is arranged below one end, close to the station conveyor belt 2, of the box reversing plate 61, a piston rod of the box reversing hydraulic cylinder 62 is vertically arranged and extends towards the direction close to the box reversing plate 61, the lower surface of the box reversing plate 61 is hinged with the upper end of the piston rod of the box reversing hydraulic cylinder 62, a box reversing bracket 63 fixed on the ground is arranged below one end, far away from the station conveyor belt 2, of the box reversing plate 61, referring to fig. 7 again, the upper end of the box reversing bracket 63 is hinged with a sliding plate 66, and the upper surface of the sliding plate 66 is in sliding connection with the lower surface of the box; the molding sand crushing mechanism 7 comprises a collecting barrel 71 arranged on one side of the box pouring plate 61 far away from the station conveyor belt 2, the opening of the collecting barrel 71 is upward, and the height of the opening of the collecting barrel 71 is lower than that of one end of the box pouring plate 61 far away from the station conveyor belt 2; after the casting in the sand box 1 is solidified, the station conveyor 2 is started, the station conveyor 2 continuously moves the sand box 1 towards the direction close to the box pouring plate 61 until the casting is conveyed to the box pouring plate 61, the box pouring hydraulic cylinder 62 is started, the piston rod of the box pouring hydraulic cylinder 62 moves upwards, one end, close to the station conveyor 2, of the box pouring plate 61 moves upwards, one end, close to the collecting barrel 71, of the box pouring plate 61 slides towards the direction close to the station conveyor 2, at the moment, one end, close to the station conveyor 2, of the sand box 1 is quickly jacked up, one end, far away from the collecting barrel 71, of the sand box 1 is jacked up, meanwhile, the sand box 1 tends to fall into the collecting barrel 71, the caking inside the sand box 1 falls into the collecting barrel 71, and a worker can take out the sand box 1 and.
Referring to fig. 6 and 7, further, a horizontally arranged first screen 76 is fixed at the opening of the collecting barrel 71, the first screen 76 covers the opening of the collecting barrel 71, the mesh size of the first screen 76 is larger than the size of the molding sand agglomerates, and the first screen 76 can obstruct the sand box 1 and the castings from entering the collecting barrel 71; thus, on one hand, the separation of the casting from the molding sand is realized; on the other hand, the casting and the flask 1 can be left at the bung of the collection bucket 71, which facilitates the worker to pick up the casting and the flask 1.
Referring to fig. 1 and 6, a guide frame 64 is arranged at one end of the station conveyor 2 close to the box reversing plate 61, the guide frame 64 is inclined downwards in the direction from the position close to the station conveyor 2 to the position close to the box reversing plate 61, namely the upper end of the guide frame 64 is flush with the surface of the station conveyor 2, and the lower end of the guide frame 64 is flush with the upper surface of the guide plate in a horizontal state; the guide frame 64 is provided with a plurality of guide rollers 65, the guide rollers 65 are uniformly distributed along the extending direction of the guide frame 64, and the axes of the guide rollers 65 are vertical to the extending direction of the guide frame 64; two ends of the guide roller 65 are rotatably connected with two sides of the guide frame 64; when the station transmission belt conveys the sand box 1 to the direction of the box reversing plate 61, the sand box 1 slides to the guide frame 64 and rolls on the guide roller 65 until the sand box 1 falls onto the box reversing plate 61 along the extension direction of the guide frame 64, so that the station transfer of the sand box 1 is more stable; the guide rollers 65 reduce the mutual contact between the flask 1 and the guide frame 64, thereby enabling the flask 1 to slide more smoothly and reducing the abrasion of the bottom surface of the flask 1 during the movement.
Referring to fig. 6 and 7, the sand crushing mechanism 7 further includes four crushing screw shafts 72 disposed inside the collection barrel 71, the crushing screw shafts 72 are disposed at the bottom of the collection barrel 71, one ends of the crushing screw shafts 72 extend into the collection barrel 71 and the other ends thereof extend downward through the collection barrel 71, the crushing screw shafts 72 are rotatably connected to the bottom of the collection barrel 71; the lower end of the crushing screw shaft 72 is provided with a driving wheel 73 positioned below the collecting barrel 71, and a synchronous belt 74 is tensioned on the four driving wheels 73; a second motor 75 for directly driving one of the four transmission wheels 73 to rotate around the axis of the second motor is arranged below the collecting barrel 71, and the second motor 75 is fixed at the bottom of the collecting barrel 71; an output shaft of the second motor 75 extends vertically upwards and is coaxially and fixedly connected with the driving wheel 73; second motor 75 direct drive wheel 73 is around self axis dead axle rotation, this drive wheel 73 and then drives all the other three drive wheel 73 rotations through hold-in range 74, four crushing screw axle 72 and then rotate at the inside synchronization of collecting vessel 71, when the molding sand enters into inside back of collecting vessel 71 through first filter screen 76, the molding sand rolls inside collecting vessel 71 under the effect of crushing screw axle 72, the great molding sand caking of volume is smashed into the molding sand granule that satisfies the operation requirement at the in-process that rolls.
Referring to fig. 1 and 3, the deluge sand adding mechanism 8 comprises a support plate 82 horizontally arranged above the station conveyor belt 2 and supports 83 arranged at two sides of the station conveyor belt 2, the supports 83 are fixed on the ground, and the support plate 82 is fixed on the supports 83; a sand adding box 81 for adding molding sand into the sand box 1 is arranged on the supporting plate 82, and the opening of the sand adding box 81 is upward; a plurality of sand outlet holes 811 arranged in a rectangular array are formed at the bottom of the sand adding box 81, a plurality of sand blocking holes 821 which have the same size and arrangement mode as the sand outlet holes 811 are formed on the supporting plate 82, and the diameter of each sand outlet hole 811 is smaller than the distance between every two adjacent sand outlet holes 811; a driving assembly 84 for driving the cope flask 81 to horizontally reciprocate on the support plate 82 is arranged on the support plate 82; when the molding sand needs to be added into the sand box 1, the sand box 1 is moved to a position right below the sand adding box 81 through the station conveyor 2, at this time, the driving assembly 84 drives the sand adding box 81 to move on the supporting plate 82 until the plurality of sand outlet holes 811 are respectively overlapped with the corresponding sand blocking holes 821, the molding sand in the sand adding box 81 further flows into the sand box 1 through the sand outlet holes 811 and the sand blocking holes 821, after the sand box 1 is filled with the molding sand, the driving assembly 84 drives the sand box 1 to move until the plurality of sand outlet holes 811 are respectively completely dislocated with the corresponding sand blocking holes 821, and at this time, the supporting plate 82 blocks the sand outlet holes 811 to prevent the molding sand from being continuously added into the sand box 1.
The driving assembly 84 comprises a second screw rod 843 horizontally arranged on one side of the sand adding box 81, and one end, close to the sand adding box 81, of the second screw rod 843 is fixedly connected with the box wall of the sand adding box 81; a second nut 842 matched with the second lead screw 843 is arranged on the second lead screw 843, and the second nut 842 is fixed on the support plate 82; one end of the second screw rod 843, which is far away from the sand adding box 81, is provided with a third motor 841 used for driving the second screw rod 843 to perform dead axle rotation around the axis of the third screw rod 843, the third motor 841 is fixed on the supporting plate 82, and the output shaft of the third motor 841 is coaxially and fixedly connected with the second screw rod 843; the third motor 841 is started, the third motor 841 drives the second lead screw 843 to make fixed-axis rotation around the axis thereof, and the second lead screw 843 drives the sand box 1 to reciprocate on the supporting plate 82 along the axis direction while rotating.
Further, horizontally arranged sliding blocks 844 are fixed on two sides of the molding box 81, and the extending direction of the sliding blocks 844 is parallel to the second screw rod 843; two second sliding rails 845 are arranged on the supporting plate 82, and the two second sliding rails 845 are respectively positioned at two sides of the sand adding box 81; the sliders 844 are slidably connected with the corresponding second sliding rails 845; this can guide the movement of the flask 81, and prevent the flask 81 from shifting in a direction perpendicular to the second lead screw 843 during the movement.
Referring to fig. 1 and 6, a sand outlet 711 is formed through the bottom of the collecting barrel 71; a molding sand conveyer group 9 is arranged below the collecting barrel 71, one section of the molding sand conveyer group 9 is positioned right below the sand discharge port 711, and one end of the molding sand conveyer group 9, which is far away from the collecting barrel 71, extends to the upper part of the sand adding box 81; through arranging sand mouth 711 on falling to sand conveyer group 9 through kibbling molding sand, inside sand conveyer group 9 will carry to adding sand case 81 through kibbling molding sand from the barrel head of collecting vessel 71, and then realize the recycle to the molding sand, and the recycle of molding sand does not need the manpower to add the molding sand in adding sand case 81, has reduced intensity of labour to a certain extent.
Further, a second filter screen 85 for further filtering the recovered molding sand is arranged on the sand adding box 81, and the second filter screen 85 is horizontally arranged at the mouth of the sand adding box 81; the second filter screen 85 can further filter the molding sand on the molding sand conveyer group 9 to filter out the larger molding sand caking of the volume that still remains in the molding sand after crushing, and to reduce the possibility that the molding sand caking blocks the sand outlet hole 811.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The utility model provides an aluminum alloy lost foam casting system, includes sand box (1), its characterized in that: a gas collection tank (31) is arranged outside the sand box (1), the wall of the gas collection tank (31) is hollow, and the gas collection tank (31) is sleeved on the sand box (1); the bottom of the sand box (1) is provided with a plurality of exhaust holes (11), the bottom surface inside the gas collection box (31) is provided with a plurality of air suction holes (311) which are in one-to-one correspondence with the exhaust holes (11), and the sand box (1) is communicated with the inside of the box wall of the gas collection box (31); an air extraction hopper (32) communicated with the interior of the box wall of the gas collection box (31) is arranged on the box wall of the gas collection box (31), and activated carbon (33) is arranged at the port of the air extraction hopper (32) close to the gas collection box (31); one end of the air suction hopper (32) far away from the air collection box (31) is connected with a negative pressure fan (34); a sand separation plate (35) is laid at the bottom of the sand box (1), and the sand separation plate (35) is made of high-temperature-resistant breathable material.
2. The aluminum alloy lost foam casting system of claim 1, wherein: one end of the air suction hopper (32) far away from the air collection box (31) is connected with a first air inlet pipe (361), one side of the air suction hopper (32) is provided with a closed dust removal box (362), and the first air inlet pipe (361) extends towards the interior of the dust removal box (362); a dust removal bag (367) positioned in the dust removal box (362) is arranged at the pipe opening of the first air inlet pipe (361), the dust removal bag (367) is communicated with the interior of the first air inlet pipe (361), and the dust removal bag (367) can enable air to pass through and block dust; the negative pressure fan (34) is arranged outside the dust removal box (362) and is connected with a second air inlet pipe (363), and the second air inlet pipe (363) extends towards the interior of the dust removal box (362) and is communicated with the interior of the dust removal box (362); an exhaust port of the negative pressure fan (34) is connected with an air outlet pipe (364) communicated with the outside atmosphere.
3. The aluminum alloy lost foam casting system of claim 1, wherein: the sand box comprises a sand box body (1) and a gas collecting box (31), and is characterized by further comprising a station conveyor belt (2), wherein the sand box body (1) and the gas collecting box body (31) can be placed on the station conveyor belt (2); a coating box (411) with an upward opening is arranged on one side of the station conveyor belt (2), and a lost foam coating is stored in the coating box (411); a pressing plate (412) and a first driving piece for driving the pressing plate (412) to move towards or away from the inner direction of the paint tank (411) are arranged above the paint tank (411).
4. The aluminum alloy lost foam casting system of claim 1, wherein: a fan (430) is arranged on one side, away from the station conveyor belt (2), of the paint tank (411), and the fan (430) supplies air towards the station conveyor belt (2) at the tank opening of the paint tank (411); two sides of one end, close to the station conveyor belt (2), of the coating box (411) are respectively provided with a first clamping plate (421) and a second clamping plate (426), and the first clamping plate (421) is arranged on a first transfer frame (428); the second clamping plate (426) is provided with a clamping hydraulic cylinder (427) which is used for driving the second clamping plate (426) to move towards the direction close to the first clamping plate (421) so as to clamp the model; the transfer frame (428) and the clamping hydraulic cylinder (427) are respectively provided with a lifting hydraulic cylinder (422), and the lifting hydraulic cylinder (422) can drive the first clamping plate (421) and the second clamping plate (426) to move upwards or downwards; two sides of the paint box (411) are respectively provided with a first screw rod (423) and a first slide rail (425), the first screw rod (423) is provided with a first nut (424) matched with the first screw rod, and the first nut (424) is connected with the first slide rail (425) in a sliding manner; the first screw rod (423) is provided with a second driving piece for driving the first screw rod (423) to rotate around the axis of the first screw rod in a fixed shaft manner; two lifting hydraulic cylinders (422) are respectively arranged on the corresponding first nuts (424).
5. The aluminum alloy lost foam casting system of claim 4, wherein: a drying conveyor belt (53) and a drying box (51) are arranged at one end, close to the station conveyor belt (2), of the paint box (411), a first screw rod (423) extends towards one end, close to the paint box (411), of the drying conveyor belt (53), and a first clamping plate (421) and a second clamping plate (426) can move to the position, close to the paint box (411), above one end of the drying conveyor belt (53); the drying conveyor belt (53) extends in a snake shape towards the inside of the drying box (51), and one end, far away from the paint box (411), of the drying conveyor belt (53) extends towards one side direction close to the station conveyor belt (2); a plurality of drying lamp tubes (52) are arranged in the drying box (51), and the temperature in the drying box (51) is maintained at 45-55 ℃.
6. An aluminum alloy lost foam casting system as recited in claim 5, wherein: a box reversing plate (61) is arranged at one section of the station conveyor belt (2), and the height of the box reversing plate (61) is lower than that of the upper surface of the station conveyor belt (2); a vertically arranged box-reversing hydraulic cylinder (62) is arranged below one end, close to the station conveyor belt (2), of the box-reversing plate (61), and a piston rod of the box-reversing hydraulic cylinder (62) is hinged to the lower surface of the box-reversing plate (61); a box reversing support (63) is arranged on the lower surface of one end, away from the station conveyor belt (2), of the box reversing plate (61), the box reversing plate (61) can slide on the box reversing support (63), and one end, away from the station conveyor belt (2), of the box reversing plate (61) can move towards one end, close to or away from the station conveyor belt (2), on the box reversing support (63); and a collecting barrel (71) with an upward opening is arranged at one end of the box reversing plate (61) far away from the station conveyor belt (2).
7. An aluminum alloy lost foam casting system as recited in claim 6, wherein: a guide frame (64) is arranged at one end, close to the box reversing plate (61), of the station conveyor belt (2), the guide frame (64) inclines downwards along the direction from close to far away from the station conveyor belt (2), the upper end of the guide frame (64) is flush with the upper surface of the station conveyor belt (2), and the lower end of the guide frame (64) is flush with the upper surface of the box reversing plate (61); a plurality of guide rollers (65) are arranged on the guide frame (64), and the axes of the guide rollers (65) are vertical to the extending direction of the guide frame (64); two ends of the guide roller (65) are rotatably connected with two sides of the guide frame (64).
8. An aluminum alloy lost foam casting system as recited in claim 7, wherein: a first filter screen (76) is arranged at a position, close to the bucket opening, of the collecting bucket (71), and the mesh size of the first filter screen (76) is larger than the size of the molding sand agglomerates and can prevent the castings from entering the collecting bucket (71); the bottom of the collecting barrel (71) is provided with a plurality of crushing screw shafts (72) extending towards the inside of the collecting barrel (71), the lower ends of the crushing screw shafts (72) penetrate through the bottom of the collecting barrel (71) and are rotatably connected with the collecting barrel (71), and the crushing screw shafts (72) can be axially fixed and rotated around the axes of the crushing screw shafts in the collecting barrel (71).
9. An aluminum alloy lost foam casting system as recited in claim 7, wherein: a supporting plate (82) and a sand adding box (81) with an upward opening are arranged above the station conveyor belt (2), and the sand box (1) can move on the station conveyor belt (2) to a position right below the sand adding box (81); the sand adding box (81) is arranged on the supporting plate (82) and can reciprocate on the supporting plate (82); a plurality of sand outlets (811) are formed in the bottom of the sand adding box (81), a plurality of sand blocking holes (821) with the same diameter as the sand outlets (811) are formed in the supporting plate (82), and the distribution of the sand blocking holes (821) on the supporting plate (82) is the same as that of the sand outlets (811) on the bottom of the sand adding box (81); the sand blocking hole (821) and the sand outlet hole (811) can be displaced with each other along with the movement of the sand adding box (81) on the supporting plate (82).
10. An aluminum alloy lost foam casting system as recited in claim 7, wherein: the bottom of the collecting barrel (71) is provided with a sand outlet (711); a molding sand conveyor belt group (9) is arranged below the collecting barrel (71), and one end of the molding sand conveyor belt group (9) far away from the collecting barrel (71) extends to the top of the sand adding box (81); a second filter screen (85) is arranged at the box opening of the sand adding box (81), and the mesh size of the second filter screen (85) is smaller than that of the first filter screen (76).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113714471A (en) * | 2021-11-02 | 2021-11-30 | 常州市富顺机械有限公司 | Conveying device for lost foam casting |
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| CN116696584A (en) * | 2023-08-07 | 2023-09-05 | 康硕(德阳)智能制造有限公司 | Engine cylinder cover and casting method thereof |
| CN116696584B (en) * | 2023-08-07 | 2023-10-13 | 康硕(德阳)智能制造有限公司 | Engine cylinder cover and casting method thereof |
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| CN112916848B (en) | 2022-06-28 |
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