CN212664850U - Sand core forming die - Google Patents

Abstract

The utility model relates to a psammitolite forming die, it includes cope match-plate pattern and lower bolster, the cope match-plate pattern is equipped with the die cavity towards lower bolster one side, the lower bolster is equipped with down the die cavity towards cope match-plate pattern one side, it includes a plurality of first upper flutes and the second upper flutes that are used for the shaping psammitolite to go up the die cavity, first upper flutes and second upper flutes evenly arrange the setting along cope match-plate pattern length direction, seted up a plurality of first lower recesses that fill the sand mouth on the lateral wall of the first upper flute dorsad on the cope match-plate pattern, the die cavity is including a plurality of first lower recesses that are used for the shaping psammitolite and a plurality of second lower recesses that are used for the shaping psammitolite, first lower recess and second lower recess all evenly arrange the setting along lower bolster length direction, a plurality of first lower fill the sand mouths on the lateral wall of the second lower flute dorsad on the lower bolster, a plurality of second lower flute have been seted up under a plurality of second on the lateral wall of the first lower flute dorsad on the lower bolster. This application has the effect that makes preparation psammitolite efficiency improve.

Description

Sand core forming die

Technical Field

The application relates to the field of molds, in particular to a sand core forming mold.

Background

The sand casting is one of casting processes, which comprises the steps of firstly making a casting mold and a core by using molding sand and core sand as molding materials, then filling liquid metal into a cavity between the casting mold and the core under the self gravity or external pressure, and after the metal is solidified, crushing the casting mold and the core to take out a workpiece. The core making method is various, the traditional method comprises the steps of vibrating, compacting and the like, the core shooting machine and the shell core machine can be used for simultaneously completing the sand filling and sand tightening work, and the core making method is relatively advanced and is more widely applied.

In the process of manufacturing the sand core, the core shooter is mainly used for injecting the molding sand into the cavity of the mold so as to complete sand filling and sand tightening, after the sand core is manufactured, the mold is opened at the moment, the manufactured sand core is taken out from the cavity of the mold, the mold is closed again, and the next core manufacturing is carried out.

In view of the above-mentioned related technologies, the inventor believes that the efficiency of manufacturing a sand core is low because the sand core needs to be taken out, the mold needs to be cleaned, and then the next core manufacturing process is performed after the sand core mold is manufactured by the core shooter once.

SUMMERY OF THE UTILITY MODEL

In order to improve the efficiency of making the psammitolite, this application provides a psammitolite forming die.

The application provides a psammitolite forming die adopts following technical scheme:

a sand core forming die comprises an upper die plate and a lower die plate, wherein an upper die cavity is arranged on one side of the upper die plate, which faces the lower die plate, a lower die cavity is arranged on one side of the lower die plate, which faces the upper die plate, the upper die cavity comprises a plurality of first upper grooves for forming sand cores and a plurality of second upper grooves for forming sand cores, the first upper grooves and the second upper grooves are uniformly distributed and arranged along the length direction of the upper die plate, the first upper grooves and the second upper grooves are symmetrically arranged relative to the upper die plate, a plurality of first upper sand filling ports are arranged on the side wall, back to the second upper grooves, of the upper die plate, the first upper sand filling ports are arranged in a one-to-one correspondence manner with the first upper grooves, a plurality of second upper sand filling ports are arranged on the side wall, back to the first upper grooves, of the upper die plate, the plurality of second upper sand filling ports are arranged in a one-to-one correspondence manner with the second upper grooves, and the second upper sand filling ports and the first upper sand filling, the lower die cavity comprises a plurality of first lower grooves for molding the sand core and a plurality of second lower grooves for molding the sand core, the first lower grooves and the second lower grooves are uniformly distributed along the length direction of the lower die plate and are symmetrically arranged relative to the lower die plate, a plurality of first lower sand filling ports are formed in the side wall of the lower die plate, back to the second lower grooves, and are in one-to-one correspondence with the first lower grooves, a plurality of second lower sand filling ports are formed in the side wall of the lower die plate, back to the first lower grooves, and are in one-to-one correspondence with the second lower grooves, and the first lower sand filling ports and the second lower sand filling ports are symmetrically arranged relative to the lower die plate.

By adopting the technical scheme, in the process of manufacturing the sand core, the upper template and the lower template are closed, at the moment, a core shooter injects molding sand into the first upper groove and the first lower groove through the first upper sand filling opening and the first lower sand filling opening, so that the first upper groove and the first lower groove are filled with the molding sand, the molding sand is compressed, so as to form the sand core, after the molding sand is injected into the first upper groove and the first lower groove, the upper template and the lower template are rotated by 180 degrees, so that the second upper sand filling opening and the second lower sand filling opening face the core shooter, at the moment, the core shooter injects the molding sand into the second upper groove and the second lower groove, so that the second upper groove and the second lower groove are filled with the molding sand, the molding sand is compressed, so as to form the sand core in the second upper groove and the second lower groove, and after the molding sand is injected, the upper template and the lower template are opened, so as to open the sand core in the first lower groove and the second lower groove, all the cores are taken out, so that a plurality of sand cores can be manufactured at one time, and the efficiency of manufacturing the sand cores is improved.

Preferably, the first lower groove and the second lower groove are both provided with movable blocks for forming the notches of the sand core, the first lower groove and the second lower groove are provided with limiting grooves, and the movable blocks are slidably arranged in the limiting grooves and tightly abut against the inner walls of the limiting grooves.

By adopting the technical scheme, because of the shape of the notch on the outer surface of the sand core to be manufactured, the manufactured sand core is inconvenient to take out from the lower die cavity after the sand core is manufactured, the loose piece is placed into the first lower groove and the second lower groove before the sand core is manufactured, the loose piece slides into the limiting groove, so that the loose piece is limited in the first lower groove and the second lower groove, when the sand core is manufactured, the molding sand is injected into the first lower groove and the second lower groove, the gap on the outer surface of the sand core can be formed by the loose piece, after the sand core is manufactured, the sand core needs to be taken out, the sand core is moved, the loose piece on the sand core is separated from the first lower groove and the second lower groove together with the sand core under the action of the sand core, when the sand core and the loose piece are taken out from the first lower groove and the second lower groove together, the loose piece is moved to separate the loose piece from the notch on the surface of the sand core, and then taking the loose piece down from the sand core, and putting the removed loose piece into the limiting groove again to manufacture the next group of sand cores.

Preferably, an upper heating plate is arranged on one side of the lower template, which is opposite to the upper template, an upper heating plate is arranged in the upper heating plate, a plurality of upper runners which are arranged in a staggered manner are arranged in the upper heating plate, a plurality of upper gas inlets are formed in the side wall of the upper heating plate, the upper gas inlets are communicated with the upper runners, the plurality of upper gas inlets are uniformly distributed and arranged along the length direction of the upper heating plate, a plurality of upper gas pipes are arranged on the side end face, which faces the upper template, of the upper heating plate, one end of each upper gas pipe is communicated with the upper runners, the other end of each upper gas pipe is arranged in the direction of the upper template, a lower heating plate is arranged on one side of the upper template, a plurality of lower runners which are arranged in a staggered manner are arranged in the lower heating plate, the plurality of lower runners are communicated with each other, a plurality of lower gas inlets are formed in the side wall, the lower gas inlet is communicated with the lower flow passage, the lower gas inlets are uniformly distributed along the length direction of the lower heating plate, a plurality of lower gas pipes are arranged on the end face, facing the lower template, of one side of the lower heating plate, the lower gas pipes are uniformly distributed and arranged on the lower heating plate, one end of each lower gas pipe is communicated with the lower flow passage, and the other end of each lower gas pipe is arranged facing the lower template.

Through adopting above-mentioned technical scheme, in the in-process to the psammitolite preparation, this moment through one of them go up logical gas mouth and lead to the gas mouth down with the coal gas of burning from last logical gas mouth and lower logical gas mouth and let in runner and lower runner in, it plugs up to lead to gas mouth and lower logical gas mouth on the other one simultaneously, the coal gas of burning this moment can let in runner and lower runner, fill in runner and lower runner, and from last logical gas pipe and lower logical gas pipe lead to cope match-plate pattern and lower bolster with the coal gas of burning, thereby heat cope match-plate pattern and lower bolster, thereby after letting in the molding sand, cope match-plate pattern and the lower bolster of heating this moment can heat the molding sand between cope match-plate pattern and the lower bolster, thereby heat the design to the psammitolite, make the psammitolite can not disperse.

Preferably, a plurality of upper thickness reducing grooves are formed in the end face, facing the upper heating plate, of the upper die plate, the upper thickness reducing grooves are evenly distributed on the upper die plate, a plurality of lower thickness reducing grooves are formed in the end face, facing the lower heating plate, of the lower die plate, and the lower thickness reducing grooves are evenly distributed on the lower die plate.

Through adopting above-mentioned technical scheme, the setting that reduces thick groove can reduce cope match-plate pattern and lower bolster thickness to make cope match-plate pattern and lower bolster can raise the temperature more easily, thereby heat the design to the psammitolite, thereby can be shorter time, heat the psammitolite, thereby practiced thrift the coal gas resource.

Preferably, the lower gas inlet and the upper gas inlet are both provided with pipe orifice plugs, the pipe orifice plugs are made of heat-resistant materials, and the pipe orifice plugs are inserted into the upper gas inlet and the lower gas inlet and are tightly attached to the inner walls of the upper gas inlet and the lower gas inlet.

Through adopting above-mentioned technical scheme, the setting of pipe orifice stopper can carry out the break-make to last logical gas mouth and logical gas mouth down, when heating cope match-plate pattern and lower bolster, at this moment through one of them go up logical gas mouth and lead to the gas mouth down with the coal gas of burning let in runner up and down in the runner, fill in the pipe orifice stopper in other logical gas mouth and logical gas mouth down simultaneously to prevent that the coal gas of burning from never letting in the last logical gas mouth and the logical gas mouth department of coal gas leaks out down, it is more convenient in the use.

Preferably, the pipe orifice plug is located and leads to gas mouth and leads to the gas mouth outer one end down and be equipped with fixed rope, go up fixed rope one end and the last hot plate lateral wall fixed connection of gas mouth department, the other end and pipe orifice plug fixed connection, lead to gas mouth department's fixed rope one end and hot plate lateral wall fixed connection down, the other end and pipe orifice plug fixed connection down.

Through adopting above-mentioned technical scheme, the setting of fixed rope can be fixed the mouth of pipe stopper on cope match-plate pattern and lower bolster, when making and need not use the mouth of pipe stopper to plug, can stay the mouth of pipe stopper on cope match-plate pattern and lower bolster this moment, can not put the mouth of pipe stopper in disorder, leads to losing.

Preferably, the upper die plate is provided with an upper mounting seat in pairs on one side opposite to the lower die plate, and the lower die plate is provided with a lower mounting seat in pairs on one side opposite to the upper die plate.

By adopting the technical scheme, the upper mounting seat and the lower mounting seat are arranged, so that the upper template and the lower template can be conveniently and quickly mounted on driving devices such as oil cylinders.

Preferably, the upper mounting seat and the lower mounting seat are both provided with lightening holes.

By adopting the technical scheme, the weight of the upper mounting seat and the lower mounting seat can be greatly reduced by arranging the lightening holes, and the energy consumption in the die sinking process is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of a sand core molding die of an embodiment of the present application;

FIG. 2 is a partial schematic view of the internal structure of the upper plate according to an embodiment of the present application;

FIG. 3 is a sectional view showing an inner structure of an upper heating plate in the embodiment of the present application;

FIG. 4 is a partial schematic view of the internal structure of the lower template of the embodiment of the present application;

FIG. 5 is a sectional view showing the inner structure of the lower heating plate in the embodiment of the present application;

FIG. 6 is a schematic view of the structure between the lower heating plate and the lower mold plate in the embodiment of the present application.

Description of reference numerals: 1. mounting a template; 2. a lower template; 3. a first upper groove; 4. a second upper groove; 5. a first upper sand filling port; 6. a second upper sand filling port; 7. a first lower groove; 8. a second lower groove; 9. a first lower sand filling port; 10. a second lower sand filling port; 11. a loose block; 12. a limiting groove; 13. an upper heating plate; 14. an upper flow passage; 15. a gas port is communicated upwards; 16. a gas pipe is communicated upwards; 17. a lower heating plate; 18. a lower runner; 19. a gas port is communicated downwards; 20. a gas pipe is arranged below; 21. an upper reduced thickness groove; 22. a lower reduced thickness groove; 23. a pipe orifice plug; 24. fixing a rope; 25. an upper mounting seat; 26. a lower mounting seat; 27. lightening holes; 28. an upper leg; 29. a lower leg.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses psammitolite forming die. Referring to fig. 1, psammitolite forming die is including relative cope match-plate pattern 1 and the lower bolster 2 that sets up, and cope match-plate pattern 1 and lower bolster 2 all set up along the horizontal direction, and cope match-plate pattern 1 is equipped with hot plate 13 dorsad to 2 side end faces of lower bolster, and lower bolster 2 is dorsad to 1 side end face of cope match-plate pattern then erect hot plate 17 down, hot plate 13 and hot plate 17 all with the die joint parallel arrangement of cope match-plate pattern 1 and lower bolster 2 down.

Referring to fig. 1, the left end and the right end of one side of the upper template 1, which faces away from the lower template 2, are respectively provided with an upper support leg 28, the two upper support legs 28 are symmetrically arranged about the upper template 1, the upper support legs 28 and the upper template 1 are integrally formed, and an upper mounting seat 25 is bolted on the end surface of one side of the upper support legs 28, which faces away from the upper template 1. Similarly, the left end and the right end of the lower template 2, which are back to the upper template 1, are respectively provided with a lower support leg 29, the two lower support legs 29 are symmetrically arranged relative to the lower template 2, the lower support legs 29 and the lower template 2 are integrally formed, and the end surface of one side, which is back to the lower template 2, of the lower support legs 29 is bolted with a lower mounting seat 26.

Referring to fig. 1, the upper and lower mounting seats 25 and 26 can respectively drive the upper and lower templates 1 and 2 to move, so as to complete the mold opening and closing action. In addition, two circular lightening holes 27 are formed in the upper mounting seat 25 and the lower mounting seat 26, so that energy consumption in the process of opening and closing the die is reduced.

Referring to fig. 2, the upper die plate 1 is provided with an upper cavity towards one side of the lower die plate 2, the upper cavity comprises three first upper grooves 3 for molding sand cores and three second upper grooves 4 for molding sand cores, the three first upper grooves 3 and the three second upper grooves 4 are symmetrically arranged about the upper die plate 1, and the three first upper grooves 3 and the three second upper grooves 4 are uniformly arranged along the length direction of the upper die plate 1.

Referring to fig. 2, in order to let in the molding sand in first upper groove 3 and the second upper groove 4, cope match-plate pattern 1 is equipped with three first sand mouth 5 of filling up on the lateral wall of second upper groove 4 dorsad, three first sand mouth 5 of filling up evenly arranges the setting along first upper groove 3 direction of arranging, three first sand mouth 5 of filling up and three first upper groove 3 one-to-one setting, first sand mouth 5 and first upper groove 3 intercommunication of filling up, after pouring in the molding sand in the first sand mouth 5 of filling up, can make the molding sand let in first upper groove 3, make and be full of the molding sand in the first upper groove 3. Also be equipped with on the lateral wall of first upper groove 3 dorsad on cope match-plate pattern 1 and fill out sand mouth 6 on the three second, fill out sand mouth 6 on the three second and evenly arrange the setting along second upper groove 4 direction of arranging, fill out sand mouth 6 and three second upper groove 4 one-to-one setting on the three second, fill out sand mouth 6 and second upper groove 4 intercommunication on the second, after filling in the sand mouth 6 into the molding sand in toward the second, can make the molding sand let in the second upper groove 4, make and fill up the molding sand in the second upper groove 4. And meanwhile, the three second upper sand filling ports 6 and the three first upper sand filling ports 5 are symmetrically arranged about the upper template 1, and after the molding sand is injected through the first upper sand filling ports 5, the upper template 1 is rotated by 180 degrees at the moment, so that the second upper sand filling ports 6 face the core shooter, and the molding sand is injected into the second upper groove 4 through the second upper sand filling ports 6.

Referring to fig. 1 and 3, in order to pour into first upper groove 3 and second upper groove 4 back at the molding sand into, heat the design to the molding sand, go up and be equipped with a plurality of runners 14 on crisscross setting in the hot plate 13, communicate each other between a plurality of runners 14, go up and seted up five on the lateral wall of hot plate 13 and led to gas mouth 15, five go up lead to gas mouth 15 all with runner 14 intercommunication on, five go up lead to gas mouth 15 along last hot plate 13 length direction and evenly arrange the setting. Go up to lead to gas port 15 department and all be equipped with pipe orifice stopper 23, pipe orifice stopper 23 is made by heat-resisting material, and pipe orifice stopper 23 inserts in last gas port 15 and pastes tightly with last gas port 15 inner wall to lead to gas port 15 to sealed up, when leading to the gas port 15 through last to the gas port in to last hot plate 13 in let in the burning coal gas, take off pipe orifice stopper 23 from last gas port 15 this moment, thereby conveniently gush into the coal gas of burning. The pipe orifice plug 23 is provided with a fixing rope 24 at one end outside the upper gas inlet 15, one end of the fixing rope 24 at the upper gas inlet 15 is bonded with the side wall of the upper heating plate 13, and the other end is bonded with the pipe orifice plug 23.

Referring to fig. 1 and 3, go up hot plate 13 and be equipped with a plurality of gas pipes 16 that lead to on towards 1 side end face of cope match-plate pattern, a plurality of gas pipes 16 that lead to and the perpendicular setting of hot plate 13 that lead to on, a plurality of gas pipes 16 that lead to evenly arrange and set up on last hot plate 13 that lead to, 16 one end of gas pipe and last runner 14 intercommunication of leading to, the other end sets up towards 1 direction of cope match-plate pattern, thereby with the gas channel cope match-plate pattern 1 of the 14 internal combustion of runner, heat cope match-plate pattern 1, thereby the molding sand heat design in the cope match-plate pattern 1.

Referring to fig. 1, in order to make the sand heating effect in cope match-plate pattern 1 better, cope match-plate pattern 1 has been seted up a plurality of on reducing the thickness groove 21 towards on 13 side end of hot plate, and a plurality of on reducing the thickness groove 21 and evenly arranging and setting up on cope match-plate pattern 1.

Referring to fig. 4, a lower cavity is arranged on one side of the lower template 2 facing the upper template 1, the lower cavity comprises three first lower grooves 7 for molding sand cores and three second lower grooves 8 for molding sand cores, the first lower grooves 7 and the second lower grooves 8 are uniformly arranged along the length direction of the lower template 2, and the first lower grooves 7 and the second lower grooves 8 are symmetrically arranged relative to the lower template 2.

Referring to fig. 4, the first lower groove 7 and the second lower groove 8 are both provided with a loose piece 11 for forming a notch of the sand core, the first lower groove 7 and the second lower groove 8 are provided with a limit groove 12, the limit groove 12 penetrates through the top wall of the lower template 2 towards one end of the upper template 1, and the loose piece 11 is slidably arranged in the limit groove 12 and is abutted against the inner wall of the limit groove 12.

Referring to fig. 4, in order to introduce molding sand into the first lower groove 7 and the second lower groove 8, three first lower sand filling ports 9 are formed in the side wall of the lower template 2 facing away from the second lower groove 8, the first lower sand filling ports 9 are arranged in one-to-one correspondence with the first lower groove 7, and the first lower sand filling ports 9 are communicated with the first lower groove 7. Three second lower sand filling openings 10 are formed in the side wall, back to the first lower groove 7, of the lower template 2, the second lower sand filling openings 10 and the second lower grooves 8 are arranged in a one-to-one correspondence mode, the second lower sand filling openings 10 are communicated with the second lower grooves 8, and the first lower sand filling openings 9 and the second lower sand filling openings 10 are symmetrically arranged relative to the lower template 2. After the molding sand is injected through the first lower sand filling port 9, the lower template 2 is rotated 180 degrees at this time, so that the second lower sand filling port 10 faces the core shooter, and the molding sand is injected into the second lower groove 8 through the second lower sand filling port 10.

Referring to fig. 4 and 5, a plurality of lower runners 18 are provided in the lower heating plate 17 in a staggered arrangement, and the plurality of lower runners 18 are communicated with each other. A plurality of lower gas ports 19 are formed in the side wall of the lower heating plate 17, the lower gas ports 19 are communicated with the lower flow channel 18, the five lower gas ports 19 are evenly distributed along the length direction of the lower heating plate 17, pipe port plugs 23 are also arranged at the positions of the lower gas ports 19, and the pipe port plugs 23 are inserted into the lower gas ports 19 and tightly attached to the inner walls of the lower gas ports 19. And a fixed rope 24 is also arranged at one end of the pipe orifice plug 23 positioned outside the lower gas inlet 19, one end of the fixed rope 24 is bonded with the side wall of the lower heating plate 17, and the other end of the fixed rope is bonded with the pipe orifice plug 23.

Referring to fig. 4, be equipped with a plurality of gas pipes 20 down on the lower heating plate 17 towards lower bolster 2 side end face, lower gas pipe 20 and the perpendicular setting of lower heating plate 17 lead to, a plurality of gas pipes 20 of leading to are evenly arranged and are set up under on heating plate 17, lead to gas pipe 20 one end and down 18 intercommunications down, the other end sets up towards 2 directions of lower bolster to lead to lower bolster 2 departments with the coal gas of burning, heat the molding sand in lower bolster 2 and the lower bolster 2.

Referring to fig. 6, in order to make the heating effect on the lower template 2 better, a plurality of lower thickness reducing grooves 22 are formed in the end face of one side of the lower template 2, which faces the lower heating plate 17, and the plurality of lower thickness reducing grooves 22 are uniformly arranged on the lower template 2.

Referring to fig. 2 and 4, when the sand core is manufactured, when the upper and lower mold plates 1 and 2 are closed, the first upper groove 3 and the first lower groove 7, the second upper groove 4 and the second lower groove 8 are all spliced together to form the appearance of the sand core, so that the first upper sand filling port 5 and the first lower sand filling port 9 are spliced together to fill the molding sand in the first upper groove 3 and the first lower groove 7, and the second upper sand filling port 6 and the second lower sand filling port 10 are spliced to fill the molding sand in the second upper groove 4 and the second lower groove 8.

The implementation principle of a sand core forming die in the embodiment of the application is as follows: in the process of manufacturing the sand core, the upper template 1 and the lower template 2 are closed, at the moment, molding sand is injected into the first upper groove 3 and the first lower groove 7 from the first upper sand filling opening 5 and the first lower sand filling opening 9 through a core shooter, so that the first upper groove 3 and the first lower groove 7 are filled with the molding sand, and the molding sand is compressed, thereby forming the sand core;

after pouring into the molding sand into first upper groove 3 and first lower groove 7, at this moment, with cope match-plate pattern 1 and lower bolster 2180 degree rotation, thereby make sand mouth 6 and the second of filling in the second fill in the sand mouth 10 towards the core shooter, use the core shooter to pour into the molding sand into second upper groove 4 and second lower groove 8 this moment, make second upper groove 4 and second lower groove 8 in fill up the molding sand, compress tightly the molding sand, thereby form the psammitolite in second upper groove 4 and second lower groove 8, after all pouring into the molding sand, at this moment, with cope match-plate pattern 1 and 2 die sinking of lower bolster, thereby with the psammitolite in first lower groove 7 and the second lower groove 8, all take out.

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 (8)

1. The utility model provides a psammitolite forming die, includes cope match-plate pattern (1) and lower bolster (2), its characterized in that: an upper cavity is arranged on one side, facing the lower template (2), of the upper template (1), a lower cavity is arranged on one side, facing the upper template (1), of the lower template (2), the upper cavity comprises a plurality of first upper grooves (3) used for molding sand cores and a plurality of second upper grooves (4) used for molding sand cores, the first upper grooves (3) and the second upper grooves (4) are uniformly distributed and arranged along the length direction of the upper template (1), the first upper grooves (3) and the second upper grooves (4) are symmetrically arranged relative to the upper template (1), a plurality of first upper sand filling ports (5) are formed in the side wall, facing away from the second upper grooves (4), of the upper template (1), the first upper sand filling ports (5) are arranged in one-to-one correspondence with the first upper grooves (3), a plurality of second upper sand filling ports (6) are formed in the side wall, facing away from the first upper grooves (3), of the upper template (1), the second upper sand filling openings (6) and the second upper grooves (4) are arranged in a one-to-one correspondence manner, the second upper sand filling openings (6) and the first upper sand filling openings (5) are symmetrically arranged relative to the upper template (1), the lower cavity comprises a plurality of first lower grooves (7) for molding sand cores and a plurality of second lower grooves (8) for molding sand cores, the first lower grooves (7) and the second lower grooves (8) are uniformly distributed along the length direction of the lower template (2), the first lower grooves (7) and the second lower grooves (8) are symmetrically arranged relative to the lower template (2), a plurality of first lower sand filling openings (9) are formed in the side wall of the lower template (2) back to the second lower grooves (8), the first lower sand filling openings (9) and the first lower grooves (7) are arranged in a one-to-one correspondence manner, and a plurality of second lower sand filling openings (10) are formed in the side wall of the lower template (2) back to the first lower grooves (7), the second lower sand filling openings (10) are arranged corresponding to the second lower grooves (8) one by one, and the first lower sand filling openings (9) and the second lower sand filling openings (10) are symmetrically arranged relative to the lower template (2).

2. The sand core molding die of claim 1, wherein: the sand core forming device is characterized in that movable blocks (11) used for forming sand core notches are arranged in the first lower groove (7) and the second lower groove (8), limiting grooves (12) are arranged in the first lower groove (7) and the second lower groove (8), and the movable blocks (11) are arranged in the limiting grooves (12) in a sliding mode and are abutted to the inner walls of the limiting grooves (12).

3. The sand core molding die of claim 1, wherein: an upper heating plate (13) is arranged on one side, back to the lower template (2), of the upper template (1), a plurality of upper runners (14) are arranged in the upper heating plate (13) in a staggered mode, the upper runners (14) are communicated with one another, a plurality of upper gas ports (15) are formed in the side wall of the upper heating plate (13), the upper gas ports (15) are communicated with the upper runners (14), the upper gas ports (15) are evenly distributed along the length direction of the upper heating plate (13), a plurality of upper gas pipes (16) are arranged on the end face, facing one side of the upper template (1), of the upper heating plate (13), the upper gas pipes (16) are evenly distributed on the upper heating plate (13), one ends of the upper gas pipes (16) are communicated with the upper runners (14), the other ends of the upper heating plate are arranged facing the direction of the upper template (1), a lower heating plate (17) is arranged on one side, back to the upper template (1), of the lower template (2), be equipped with a plurality of lower runners (18) that crisscross set up in lower hot plate (17), it is a plurality of communicate each other between lower runner (18), a plurality of lower logical gas mouth (19) have been seted up on the lateral wall of lower hot plate (17), it is a plurality of to lead to gas mouth (19) and lower runner (18) intercommunication down lead to gas mouth (19) and evenly arrange the setting along lower hot plate (17) length direction down, hot plate (17) are equipped with a plurality of logical gas pipe (20) down on lower bolster (2) one side terminal surface down, and are a plurality of lead to gas pipe (20) and evenly arrange the setting under on hot plate (17), lead to gas pipe (20) one end and lower runner (18) intercommunication down, the other end sets up towards lower bolster (2) direction.

4. The sand core molding die of claim 3, wherein: the hot plate structure is characterized in that a plurality of upper thickness reducing grooves (21) are formed in the end face, facing one side of the upper hot plate (13), of the upper die plate (1), the upper thickness reducing grooves (21) are evenly distributed and arranged on the upper die plate (1), a plurality of lower thickness reducing grooves (22) are formed in the end face, facing one side of the lower hot plate (17), of the lower die plate (2), and the lower thickness reducing grooves (22) are evenly distributed and arranged on the lower die plate (2).

5. The sand core molding die of claim 3, wherein: lower logical gas mouth (19) and last logical gas mouth (15) department all are equipped with pipe orifice stopper (23), pipe orifice stopper (23) are made by heat-resisting material, pipe orifice stopper (23) insert go up logical gas mouth (15) and lead to gas mouth (19) down in and with lead to gas mouth (15) and lead to gas mouth (19) inner wall down and paste tightly.

6. The sand core molding die of claim 5, wherein: the mouth of a pipe stopper (23) are located and are served and be equipped with fixed rope (24) with logical gas mouth (19) outer one end down, go up fixed rope (24) one end and last hot plate (13) lateral wall fixed connection of logical gas mouth (15) department, the other end and mouth of a pipe stopper (23) fixed connection, lead to fixed rope (24) one end and hot plate (17) lateral wall fixed connection down of gas mouth (19) department, the other end and mouth of a pipe stopper (23) fixed connection down.

7. The sand core molding die of claim 1, wherein: the side, back to the lower template (2), of the upper template (1) is provided with upper mounting seats (25) in pairs, and the side, back to the upper template (1), of the lower template (2) is provided with lower mounting seats (26) in pairs.

8. The sand core molding die of claim 7, wherein: lightening holes (27) are formed in the upper mounting seat (25) and the lower mounting seat (26).

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