CN113198972B - Resin sand casting equipment and casting process - Google Patents

Abstract

The utility model relates to a resin sand casting equipment and casting technology belongs to work piece casting technical field, and it includes the frame and mixes the sand box, be equipped with rabbling mechanism in mixing the sand box, the discharge gate has been seted up to the sand box lower extreme that mixes, it is equipped with the discharging pipe in discharge gate department to mix the sand box, the discharging pipe below is equipped with the discharge mechanism just right with the discharge gate, discharge mechanism includes the mount pad, the mount pad upper end is equipped with a pay-off section of thick bamboo, the feed cylinder upper end is seted up with the discharge gate just right feed inlet, a pay-off section of thick bamboo rotates with the mount pad to be connected, be equipped with pay-off auger one in the pay-off section of thick bamboo. This application has the effect of being convenient for arrange into the mould with resin sand.

Description

Resin sand casting equipment and casting process

Technical Field

The application relates to the technical field of workpiece casting, in particular to resin sand casting equipment and a casting process.

Background

The resin sand casting is improved and adjusted on the basis of the traditional casting coating, can effectively prevent the high-temperature liquid metal from being oxidized and does not have chemical reaction in the contact process with the casting mould and the high-temperature liquid metal. Before casting, the resin sand needs to be stirred uniformly, and then the uniformly stirred resin sand is discharged into a mold, and a sand mixer is usually used for stirring the resin sand.

Related chinese patent with publication number CN207308878U discloses a sand mixer, which comprises a frame, a material box and a bowl-shaped sand mixing barrel are arranged on the frame, the sand mixing barrel is arranged below the material box, a fixing plate for installing the sand mixing barrel is arranged on the frame, a feed inlet and a discharge outlet are arranged on the sand mixing barrel, a conical rotor is arranged at the bottom of the sand mixing barrel, the conical rotor is driven to rotate by a motor, the motor is arranged outside the sand mixing barrel and is arranged on the fixing plate, a plurality of spoilers are arranged on the surface of the rotor, the spoilers are vertically connected with the surface of the rotor, a plurality of arc-shaped spoilers are uniformly distributed on the inner wall of the sand mixing barrel, the spoilers extend from the top to the bottom of the sand mixing barrel, and a wear-resistant coating is further arranged on the inner wall of the sand mixing barrel.

In view of the above-mentioned related art, the inventor believes that when the resin sand is stirred by the sand mixer, the resin sand after stirring is inconvenient to be discharged into the mold when the resin sand after stirring needs to be discharged.

Disclosure of Invention

In order to facilitate discharging the resin sand into the mold, the application provides resin sand casting equipment and a casting process.

In a first aspect, the present application provides a resin sand casting apparatus, which adopts the following technical scheme:

the utility model provides a resin sand casting equipment, includes frame and mulling case, be equipped with rabbling mechanism in the mulling case, the discharge gate has been seted up to mulling case lower extreme, it is equipped with the discharging pipe to mix the sand case in discharge gate department, the discharging pipe below is equipped with the discharge mechanism just right with the discharge gate, discharge mechanism includes the mount pad, the mount pad upper end is equipped with a pay-off section of thick bamboo, the feed inlet just right with the discharge gate is seted up to a pay-off section of thick bamboo upper end, a pay-off section of thick bamboo rotates with the mount pad to be connected, be equipped with pay-off auger one in the pay-off section of thick bamboo.

Through adopting above-mentioned technical scheme, before casting the work piece, add the resin sand to the mulling incasement earlier, start the rabbling mechanism in the mulling incasement, the rabbling mechanism can stir the resin sand in the mulling incasement, the resin sand that the stirring was accomplished can follow the discharging pipe and discharge the mulling case, can fall into in the pay-off section of thick bamboo, set up pay-off auger I in the pay-off section of thick bamboo, can carry the resin sand in the pay-off section of thick bamboo, when needing to discharge the resin sand to the mould in, can rotate the pay-off section of thick bamboo in the mount pad upper end, and then be convenient for discharge the resin sand to placing in the mould around the frame.

Optionally, the mounting seat is arranged in a hollow manner, a rotating motor is arranged inside the mounting seat, the mounting seat comprises a rotating plate arranged at the upper end, and an output shaft of the rotating motor penetrates through the rotating plate to be connected with the feeding barrel.

Through adopting above-mentioned technical scheme, when needing to rotate a pay-off section of thick bamboo, start the rotating electrical machines, the output shaft of rotating electrical machines is rotatory, can drive and take place relative rotation between pay-off section of thick bamboo and the rotor plate.

Optionally, a rotating plate is arranged at the lower end of the feeding barrel, the lower end of the rotating plate is connected with an output shaft of a rotating motor, a connecting piece is arranged between the rotating plate and the feeding barrel, and a second discharging mechanism opposite to the discharging port is arranged at the feeding port of the feeding barrel.

Through adopting above-mentioned technical scheme, set up the rotor plate and improved the stability of feed cylinder and rotating electrical machines output shaft, set up the connecting piece between rotor plate and the feed cylinder, improved the stability of being connected between rotor plate and the feed cylinder, the feed cylinder upper end sets up the second and arranges material mechanism, has improved the device and to the discharge range of resin sand, and then has improved the device's application scope.

Optionally, the connecting piece includes at least two connecting plates, one end of each connecting plate is connected with the feeding barrel, the other end of each connecting plate is connected with the rotating plate, reinforcing rods are arranged on the outer sides of the feeding barrels, and a plurality of reinforcing plates are arranged between the connecting plates and the reinforcing rods.

Through adopting above-mentioned technical scheme, set up the steadiness that the connecting plate has improved a pay-off section of thick bamboo and rotor plate and be connected, set up the anchor strut, improved the fastness of being connected between connecting plate and the pay-off section of thick bamboo, set up the gusset plate between connecting plate and anchor strut, further improved the steadiness of being connected between connecting plate and the pay-off section of thick bamboo.

Optionally, the second discharging mechanism comprises a material guide cylinder, the lower end of the material guide cylinder is communicated with the feeding hole, the upper end of the material guide cylinder is right opposite to the discharging hole, the middle of the material guide cylinder is communicated with a feeding pipe, a feeding auger II is arranged in the feeding pipe, and the material guide cylinder is rotatably connected with the feeding cylinder.

Through adopting above-mentioned technical scheme, the resin sand of discharge gate exhaust can fall into the guide cylinder in, starts the pay-off auger II that sets up in the pay-off pipe, and pay-off auger II can carry the resin sand in the pay-off pipe, rotates the guide cylinder and can adjust the transport angle of pay-off pipe.

Optionally, a rotating ring is arranged at the upper end of the feeding barrel, a rotating ring is arranged on the guide barrel, a rotating groove matched with the rotating ring is formed in the rotating ring, a first limiting piece is arranged on the outer side of the rotating ring, a second limiting piece is arranged on the outer side of the guide barrel, a first rotating hole is formed in the first limiting piece, a second rotating hole is formed in the second limiting piece, and a bolt penetrates through the first rotating hole and the second rotating hole.

Through adopting above-mentioned technical scheme, when the rotation angle that needs to the conveying pipe is adjusted, the rotating collar can rotate at the rotation inslot, and rotating collar and rotating groove cooperation are convenient for realize the rotation between rotating collar and the guide cylinder, rotate the conveying pipe to needs the position after, can alternate the bolt in rotating hole one and rotating hole two, the bolt can with spacing piece one and spacing piece two cooperations, and then can realize spacing to the conveying pipe, pivoted problem when can improve the conveying pipe defeated material.

Optionally, the stirring mechanism comprises a horizontal plate arranged at the upper end of the sand mixing box, the two ends of the horizontal plate are connected with the sand mixing box, a stirring motor is arranged at the upper end of the horizontal plate, an output shaft of the stirring motor penetrates through the horizontal plate to be connected with a stirring shaft, and a stirring paddle is arranged at the part of the stirring shaft, which is located in the stirring box.

Through adopting above-mentioned technical scheme, when adding the resin sand raw materials to the mulling incasement portion, start agitator motor, agitator motor's output shaft rotation can drive the (mixing) shaft and rotate, and then can drive the stirring rake and stir the raw materials of mulling incasement.

In a second aspect, the present application provides a resin sand casting process, including the following technical solutions:

a resin sand casting process comprises the following steps:

s1: adding the resin sand raw material into a sand mixer, and obtaining resin sand after stirring;

s2: arranging and checking the die, checking whether a die core box is complete, removing redundant residual deposits on the surface of the die core box, checking whether the die core box has unfilled corners and deformation, and checking whether the size meets the requirements of a drawing; checking whether the loose block and the casting head are incomplete or not;

s3: molding, namely placing the models on a molding platform in sequence, cleaning impurities on the surfaces of the models, lifting and cleaning the models, knocking, smashing, bumping and throwing, counting movable blocks, pouring gates, supplementing sand core boxes and placing according to marks; the segmented models need to be aligned and pulled to be straight, a release agent needs to be brushed in advance when the new model is used, and the release agent can be used after being completely dried so as to avoid sand sticking from influencing the surface quality of the casting; the release agent is uniformly brushed to avoid accumulation and sagging; the mold release agent can be repeatedly used for 5 times by brushing once, the old mold and the loose piece are easy to be stripped and are the standard for whether the mold release agent is brushed again, and the mold release agent is brushed to avoid covering various marks;

s4: adding sand and pounding, placing sand on a large casting from a certain corner of a sand box, and properly adjusting the adding amount of a curing agent to prolong the service life of resin sand; continuously expanding the sand box from one corner of the sand box along other directions of the mold gradually while discharging the sand and tamping until the whole sand box is full; for a large-space sand box, the resin sand can be placed to a certain thickness along with the shape of a mould, the thickness is generally controlled to be 150-200mm, the resin sand at the positions of a pouring gate, a dead head and an air outlet hole can meet the process requirements, the heights of the positions of the pouring gate, the dead head and the air outlet hole can meet the process requirements by using a dead head ring and the like, and when the sand discharge is finished, the tail sand can be placed at unimportant positions only without placing at the positions of the pouring gate and the air outlet hole;

s5: adding sand blocks or other fillers, pounding the surface of the sample, and adding the sand blocks or other fillers when the thickness of the filled sand exceeds 100mm of the model, wherein the sand blocks cannot be placed at positions such as the positions near a sprue without a ceramic pipe, the positions near a cross runner, the positions near an air outlet, thick-wall castings requiring high sand mold strength and the like;

s6: stripping, wherein the resin sand slightly changes color and is sticky after ten minutes, and a dead head, a sprue gate and a gas outlet rod can be pulled out, so that the casting is taken out;

s7: modifying: repairing the damaged part after stripping;

s8: brushing the coating, namely brushing the surface of the casting with the coating to improve the quality of the casting;

s9: matching the mold, namely checking the empty mold closing box, then stabilizing the box, and after the box stabilization is finished, discharging the core;

s10: the first mould assembling chain is loosened to ensure that the upper mould and the lower mould are fully jointed, the positions of the positioning marks are recorded, the positions of the sprue, the feeding head and the punching head are verified, then the upper mould is lifted, the lifting is rapid, the condition that whether tools and other objects are left in the mould or not before the sand box slides to a large extent to formally assemble the mould is avoided, the position of the upper mould is adjusted according to the mould assembling marks and the first mould assembling and the verification condition after the sand box is confirmed to be correct, and whether the pouring head is aligned or not and whether sundries fall into the mould or not is checked again after the formally assembled mould is finished;

s11: and after the mould assembling is finished, pouring, and taking out the casting after the casting is cooled.

By adopting the technical scheme, the casting is processed, and the method has the advantages of simple process and high casting efficiency.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the sand mixing box, the discharging mechanism and the second discharging mechanism, the resin sand is convenient to stir and prepare, and is also convenient to discharge into the mold;

2. this application is convenient for stir the resin sand raw materials to mixing in the sand box and mix through setting up rabbling mechanism.

Drawings

FIG. 1 is a schematic structural view of a resin sand casting apparatus according to the present application;

FIG. 2 is a schematic view of the embodiment of the present application highlighting the discharge mechanism;

FIG. 3 is a schematic view showing the structure of a spiral blade in the embodiment of the present application;

fig. 4 is an enlarged schematic view of the structure a in fig. 3.

Description of reference numerals: 1. a frame; 11. a sand mixing box; 2. a stirring mechanism; 21. a horizontal plate; 22. a stirring motor; 23. a stirring shaft; 24. a stirring paddle; 3. a second discharge mechanism; 31. a material guide cylinder; 32. a feed pipe; 33. a feeding auger II; 34. rotating the rod; 35. a helical blade; 36. a first blade; 37. connecting sheets; 38. an adjustment gate; 4. a discharge mechanism; 41. a feed cylinder; 42. a rotating ring; 43. a mounting seat; 44. a feeding auger I; 45. rotating the ring; 46. a rotating groove; 5. a first limiting sheet; 51. a second limiting sheet; 52. rotating the first hole; 53. rotating the second hole; 54. a bolt; 6. a rotating electric machine; 64. a rotating plate; 65. a rotating plate; 66. a connecting member; 67. a connecting plate; 7. a reinforcing rod; 77. and a reinforcing plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses resin sand casting equipment.

Referring to fig. 1, a resin sand casting apparatus includes a frame 1, a sand mixing box 11, a discharging mechanism 4, and a second discharging mechanism 3. Mix sand box 11 and set up in frame 1, the second is arranged material mechanism 3 and is arranged material mechanism 4 and set up in order from top to bottom mixing sand box 11 lower extreme, is convenient for discharge to the mould to the resin sand that mixes the completion of mixing sand box 11 through setting up second row material mechanism 3 and arranging material mechanism 4.

Referring to fig. 1, a stirring mechanism 2 is arranged in the sand mulling tank 11, the stirring mechanism 2 comprises a horizontal plate 21, a stirring motor 22, a stirring shaft 23 and a stirring paddle 24, the horizontal plate 21 is horizontally arranged at the upper end of the sand mulling tank 11, the stirring motor 22 is arranged at the upper end of the horizontal plate 21, an output shaft of the stirring motor 22 penetrates through the horizontal plate 21 to be connected with the stirring shaft 23, and the part of the stirring shaft 23, which is positioned in the stirring tank, is connected with the stirring paddle 24. When needing to prepare the resin sand, drop into resin sand raw materials to mulling case 11 in, start agitator motor 22, agitator motor 22's output shaft is rotatory can drive (mixing) shaft 23 and rotate, and then can drive stirring rake 24 and stir the raw materials in the mulling case 11. The sand mixing box 11 is provided with a discharge pipe at the discharge port, and the second discharge mechanism 3 is opposite to the discharge pipe.

Referring to fig. 2 and 3, the second discharging mechanism 3 includes a material guiding cylinder 31, a feeding pipe 32 and a feeding auger two 33. Guide cylinder 31 lower extreme and discharge mechanism 4 rotate to be connected, and conveying pipe 32 intercommunication is at guide cylinder 31 middle part, and guide cylinder 31 upper end is just right with the discharging pipe, rotates guide cylinder 31 and can adjust the delivery angle of conveying pipe 32, and then is convenient for discharge the resin sand to the mould of placing in the different positions. When the resin sand falls into the feeding pipe 32, the second feeding auger 33 is started, and the discharge of the resin sand can be realized.

Referring to fig. 2 and 3, the discharging mechanism 4 includes a feeding barrel 41, a rotating ring 42, a mounting seat 43 and a feeding auger I44, a feeding port is provided at the upper end of the feeding barrel 41, the mounting seat 43 is arranged below the feeding pipe 32, the feeding barrel 41 is arranged at the upper end of the mounting seat 43, the feeding barrel 41 is rotatably connected with the mounting seat 43, the rotating ring 42 is arranged at the upper end of the feeding barrel 41, the feeding port is opposite to the guide barrel 31, the rotating ring 42 is rotatably connected with the guide barrel 31, the feeding auger I44 is arranged in the feeding barrel 41, the feeding direction of the feeding barrel 41 can be conveniently adjusted by rotating the feeding barrel 41, the discharging range of the resin sand is improved, and the resin sand is conveniently discharged into the mold.

Referring to fig. 3 and 4, a rotating ring 45 is arranged at the lower end of the guide cylinder 31, a rotating groove 46 matched with the rotating ring 45 is formed in the rotating ring 42, and the guide cylinder 31 and the rotating ring 42 are rotatably connected through the matching of the rotating ring 45 and the rotating groove 46. The first limiting piece 5 is arranged on the outer side of the rotating ring 42, the second limiting piece 51 is arranged on the outer side of the material guide cylinder 31, the first limiting piece 5 is provided with a plurality of first rotating holes 52, the second limiting piece 51 is provided with a plurality of second rotating holes 53, and the first rotating holes 52 and the second rotating holes 53 are internally provided with bolts 54 in a penetrating manner. After the material guiding cylinder 31 is rotated to a required position, the bolt 54 can be inserted into the first rotating hole 52 and the second rotating hole 53, and the bolt 54 can limit the material guiding cylinder 31.

Referring to fig. 3 and 4, the mounting base 43 is hollow, the rotating motor 6 is arranged in the mounting base 43, the mounting base 43 comprises a rotating plate 64 arranged at the upper end, an output shaft of the rotating motor 6 penetrates through the rotating plate 64 to be connected with a rotating plate 65, the rotating plate 65 is connected with the feeding barrel 41, when the angle of the feeding barrel 41 needs to be adjusted, the rotating motor 6 is started, the output shaft of the rotating motor 6 rotates, the rotating plate 65 can be driven, and then the angle of the feeding barrel 41 can be adjusted.

Referring to fig. 2 and 3, a connecting piece 66 is arranged between the rotating plate 65 and the feeding barrel 41, the connecting piece 66 comprises two connecting plates 67, the upper end of each connecting plate 67 is connected with the feeding barrel 41, the lower end of each connecting plate 67 is connected with the rotating plate 65, and the connecting plates 67 are arranged to improve the connection stability between the rotating plate 65 and the feeding barrel 41. A reinforcing rod 7 is arranged outside the feeding barrel 41, and a plurality of reinforcing plates 77 are arranged between the connecting plate 67 and the reinforcing rod 7. The provision of the reinforcing rod 7 and the reinforcing plate 77 further improves the stability of the connection between the feeding barrel 41 and the rotating plate 65.

Referring to fig. 3 and 4, the second feeding auger 33 comprises a rotating rod 34 and a spiral blade 35, the spiral blade 35 comprises a first blade 36 opposite to the feeding port, the first blade 36 is detachably connected with the rotating rod 34, an arc connecting sheet 37 is arranged at the contact position of the end part of the first blade 36 and the rotating rod 34, the connecting sheet 37 is detachably connected with the rotating rod 34, an adjusting door 38 is hinged at the position of the feeding pipe 32 opposite to the first blade 36, the adjusting door 38 is opened, the first blade 36 is conveniently detached from the rotating rod 34, and therefore when the resin sand is discharged through the feeding barrel 41, the resin sand can conveniently pass through the guide barrel 31 and the feeding pipe 32.

The implementation principle of resin sand casting equipment of the embodiment of the application is as follows: before casting a workpiece, adding resin sand into the sand mixing box 11, starting the stirring motor 22 in the sand mixing box 11, stirring the resin sand in the sand mixing box 11 by the stirring paddle 24, discharging the mixed sand box 11 from the discharge pipe after stirring, dropping the mixed sand into the guide cylinder 31, and discharging the resin sand through the material discharging mechanism 4 and the second material discharging mechanism 3 according to different placing positions of the mold.

The embodiment of the application also discloses a resin sand casting process, which comprises the following steps:

s1: adding the resin sand raw material into a sand mixer, and obtaining resin sand after stirring;

s2: arranging and checking the die, checking whether a die core box is complete, removing redundant residual deposits on the surface of the die core box, checking whether the die core box has unfilled corners and deformation, and checking whether the size meets the requirements of a drawing; checking whether the loose block and the casting head are incomplete or not;

s3: molding, namely placing the models on a molding platform in sequence, cleaning impurities on the surfaces of the models, lifting and cleaning the models, knocking, smashing, bumping and throwing, counting movable blocks, pouring gates, supplementing sand core boxes and placing according to marks; the segmented models need to be aligned and pulled to be straight, a release agent needs to be brushed in advance when the new model is used, and the release agent can be used after being completely dried so as to avoid sand sticking from influencing the surface quality of the casting; the release agent is uniformly brushed to avoid accumulation and sagging; the mold release agent can be repeatedly used for 5 times by brushing once, the old mold and the loose piece are easy to be stripped and are the standard for whether the mold release agent is brushed again, and the mold release agent is brushed to avoid covering various marks;

s4: adding sand and pounding, putting the large casting from a certain corner of a sand box, and properly adjusting the adding amount of the curing agent to prolong the service life of the resin sand; continuously expanding the sand box from one corner of the sand box along other directions of the mold gradually while discharging the sand and tamping until the whole sand box is full; for a large-space sand box, the resin sand can be placed to a certain thickness along with the shape of a mould, the thickness is generally controlled to be 150 plus 200mm, the resin sand at the positions of a pouring gate, a dead head and an air outlet hole can meet the process requirements by using a dead head ring and the like, and when the sand discharging is finished, the tailing sand can be placed at the positions of the pouring gate and the air outlet hole but can be placed at unimportant positions;

s5: adding sand blocks or other fillers, pounding the surface of the sample, and adding the sand blocks or other fillers when the thickness of the filled sand exceeds 100mm of the model, wherein the sand blocks cannot be placed at positions such as the positions near a sprue without a ceramic pipe, the positions near a cross runner, the positions near an air outlet, thick-wall castings requiring high sand mold strength and the like;

s6: stripping, wherein the resin sand slightly changes color and is sticky after ten minutes, and a dead head, a sprue gate and a gas outlet rod can be pulled out, so that the casting is taken out;

s7: modifying: repairing the damaged part after stripping;

s8: brushing the coating, namely brushing the surface of the casting with the coating to improve the quality of the casting;

s9: matching the mold, namely checking the empty mold closing box, then stabilizing the box, and after the box stabilization is finished, discharging the core;

s10: the first mould assembling chain is loosened to ensure that the upper mould and the lower mould are fully jointed, the positions of the positioning marks are recorded, the positions of the sprue, the feeding head and the punching head are verified, then the upper mould is lifted, the lifting is rapid, the condition that whether tools and other objects are left in the mould or not before the sand box slides to a large extent to formally assemble the mould is avoided, the position of the upper mould is adjusted according to the mould assembling marks and the first mould assembling and the verification condition after the sand box is confirmed to be correct, and whether the pouring head is aligned or not and whether sundries fall into the mould or not is checked again after the formally assembled mould is finished;

s11: and after the mould assembling is finished, pouring, and taking out the casting after the casting is cooled.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (5)

1. The utility model provides a resin sand casting equipment, includes frame (1) and mulling case (11), its characterized in that: a stirring mechanism (2) is arranged in the sand mixing box (11), a discharge hole is formed in the lower end of the sand mixing box (11), a discharge pipe is arranged at the discharge hole of the sand mixing box (11), a discharge mechanism (4) opposite to the discharge hole is arranged below the discharge pipe, the discharge mechanism (4) comprises an installation seat (43), a feeding barrel (41) is arranged at the upper end of the installation seat (43), a feed hole opposite to the discharge hole is formed in the upper end of the feeding barrel (41), the feeding barrel (41) is rotatably connected with the installation seat (43), and a feeding auger I (44) is arranged in the feeding barrel (41);

the mounting seat (43) is arranged in a hollow mode, the rotating motor (6) is arranged inside the mounting seat (43), the mounting seat (43) comprises a rotating plate (64) arranged at the upper end, and an output shaft of the rotating motor (6) penetrates through the rotating plate (64) to be connected with the feeding barrel (41);

a rotating plate (65) is arranged at the lower end of the feeding barrel (41), the lower end of the rotating plate (65) is connected with an output shaft of a rotating motor (6), a connecting piece (66) is arranged between the rotating plate (65) and the feeding barrel (41), and a second discharging mechanism (3) opposite to the discharging port is arranged at the position of the feeding port of the feeding barrel (41);

the second discharging mechanism (3) comprises a material guide cylinder (31), the lower end of the material guide cylinder (31) is communicated with the feeding hole, the upper end of the material guide cylinder (31) is opposite to the discharging hole, the middle part of the material guide cylinder (31) is communicated with a feeding pipe (32), a feeding packing auger (33) is arranged in the feeding pipe (32), and the material guide cylinder (31) is rotatably connected with a feeding cylinder (41);

pay-off auger two (33) include rotary rod (34) and helical blade (35), helical blade (35) include with the feed inlet just right blade (36), blade (36) can be dismantled with rotary rod (34) and be connected, the tip of blade (36) is equipped with curved connection piece (37) with rotary rod (34) conflict department, connection piece (37) can be dismantled with rotary rod (34) and be connected, conveying pipe (32) articulate with blade (36) just right position has regulation door (38).

2. The resin sand casting apparatus as recited in claim 1, wherein: the connecting piece (66) comprises at least two connecting plates (67), one end of each connecting plate (67) is connected with the feeding barrel (41), the other end of each connecting plate (67) is connected with the rotating plate (65), reinforcing rods (7) are arranged on the outer sides of the feeding barrels (41), and a plurality of reinforcing plates (77) are arranged between the connecting plates (67) and the reinforcing rods (7).

3. The resin sand casting apparatus as recited in claim 1, wherein: the feeding cylinder (41) is provided with a rotating ring (42) at the upper end, the guide cylinder (31) is provided with a rotating ring (45), the rotating ring (42) is provided with a rotating groove (46) matched with the rotating ring (45), a first limiting piece (5) is arranged on the outer side of the rotating ring (42), a second limiting piece (51) is arranged on the outer side of the guide cylinder (31), the first limiting piece (5) is provided with a plurality of first rotating holes (52), the second limiting piece (51) is provided with a plurality of second rotating holes (53), and a bolt (54) penetrates through the first rotating holes (52) and the second rotating holes (53).

4. The resin sand casting apparatus as recited in claim 1, wherein: the stirring mechanism (2) comprises a horizontal plate (21) arranged at the upper end of the sand mixing box (11), the two ends of the horizontal plate (21) are connected with the sand mixing box (11), a stirring motor (22) is arranged at the upper end of the horizontal plate (21), an output shaft of the stirring motor (22) penetrates through the horizontal plate (21) to be connected with a stirring shaft (23), and a stirring paddle (24) is arranged at the part, located in the stirring box, of the stirring shaft (23).

5. A resin sand casting process according to any one of claims 1 to 4, wherein: the method comprises the following steps:

s1: adding the resin sand raw material into a sand mixer, and obtaining resin sand after stirring;

s2: arranging and checking the die, checking whether a die core box is complete, removing redundant residual deposits on the surface of the die core box, checking whether the die core box has unfilled corners and deformation, and checking whether the size meets the requirements of a drawing; checking whether the loose block and the casting head are incomplete or not;

s3: molding, namely placing the models on a molding platform in sequence, cleaning impurities on the surfaces of the models, hanging and cleaning the models, knocking, smashing, bumping and falling, cleaning loose blocks, the number of pouring gates, supplementing sand core boxes and placing according to marks; the segmented models need to be aligned and the lines are pulled for straightening, a release agent needs to be brushed in advance when the new model is used, and the release agent can be used after being completely dried so as to avoid that the sand adhesion influences the surface quality of the casting; the release agent is uniformly brushed to avoid accumulation and sagging; the mold release agent can be repeatedly used for 5 times by brushing once, the old mold and the loose piece are easy to be stripped and are the standard for whether the mold release agent is brushed again, and the mold release agent is brushed to avoid covering various marks;

s4: adding sand and pounding, putting the large casting from a certain corner of a sand box, and properly adjusting the adding amount of the curing agent to prolong the service life of the resin sand; continuously expanding the sand box from one corner of the sand box along other directions of the mold gradually while discharging the sand and tamping until the whole sand box is full; for a large-space sand box, the resin sand can be placed to a certain thickness along with the shape of a mould, the thickness is generally controlled to be 150 plus 200mm, the resin sand at the positions of a pouring gate, a dead head and an air outlet hole can meet the process requirements by using a dead head ring and the like, and when the sand discharging is finished, the tailing sand can be placed at the positions of the pouring gate and the air outlet hole but can be placed at unimportant positions;

s5: adding sand blocks or other fillers, wherein the surface of the pattern needs to be pounded, when the thickness of the filled sand exceeds 100mm of the pattern, the sand blocks or other fillers can be added, and the sand blocks cannot be placed at positions such as the positions near a sprue without a ceramic pipe, the positions near a cross runner, the positions near an air outlet, thick-wall castings requiring high sand mold strength and the like;

s6: stripping, wherein the resin sand slightly changes color and is sticky after ten minutes, and a riser, a sprue gate and an air outlet rod can be pulled out;

s7: modifying: repairing the damaged part after stripping;

s8: brushing the coating, namely brushing the surface of the casting with the coating to improve the quality of the casting;

s9: matching the mold, namely checking the empty mold closing box, then stabilizing the box, and after the box stabilization is finished, discharging the core;

s10: the first mould assembling chain is loosened to ensure that the upper mould and the lower mould are fully jointed, the positions of the positioning marks are recorded, the positions of the sprue, the feeding head and the punching head are verified, then the upper mould is lifted, the lifting is rapid, the condition that whether tools and other objects are left in the mould or not before the sand box slides to a large extent to formally assemble the mould is avoided, the position of the upper mould is adjusted according to the mould assembling marks and the first mould assembling and the verification condition after the sand box is confirmed to be correct, and whether the pouring head is aligned or not and whether sundries fall into the mould or not is checked again after the formally assembled mould is finished;

s11: and after the mould assembling is finished, pouring, and taking out the casting after the casting is cooled.

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