CN110038997B

CN110038997B - Millstone regenerator for sand recovery

Info

Publication number: CN110038997B
Application number: CN201910415695.2A
Authority: CN
Inventors: 鞠家坤; 鞠家滨
Original assignee: Wuxi Jinzhao Ocean Machinery Equipment Co ltd
Current assignee: Wuxi Jinzhao Ocean Machinery Equipment Co ltd
Priority date: 2019-05-18
Filing date: 2019-05-18
Publication date: 2021-01-19
Anticipated expiration: 2039-05-18
Also published as: CN110038997A

Abstract

The invention relates to a molding sand regenerator, and discloses a millstone regenerator for recovering molding sand, which has the technical scheme that the millstone regenerator comprises a base, wherein one side of the base is fixedly connected with a vertically-through sanding box, one side of the sanding box, which faces the base, is provided with an axle inlet through hole, the base is rotatably connected with a power shaft, one end of the power shaft extends into the axle inlet through hole, the base is provided with a driving motor for driving the power shaft to rotate, one end of the power shaft, which extends into the sanding box, is fixedly sleeved with a rotating millstone, the side wall of the sanding box, which faces the power shaft, is provided with a mounting hole, the mounting hole is connected with a cover plate through a bolt, one side of the cover plate, which faces the power shaft, is fixedly connected with a fixed millstone, the gap between the fixed millstone and the rotating millstone is arranged. The invention grinds the molding sand through the relative motion between the fixed millstone and the rotary millstone, and has the advantages of enlarging the grinding area of the molding sand and improving the regeneration treatment quality of the molding sand.

Description

Millstone regenerator for sand recovery

Technical Field

The invention relates to a molding sand regenerator, in particular to a millstone regenerator for recovering molding sand.

Background

In the conventional self-hardening sand casting production, the molding sand is a raw material with a large consumption, and after repeated use, the quality of the molding sand is greatly reduced due to deformation and damage of the resin binder and sand particles remained on the surface, so that defects such as casting air holes, sand holes, surface roughness and the like are caused. In order to ensure the quality of castings, the used sand can be reused to manufacture sand moulds after being subjected to reclamation and regeneration, and the process of reclamation and regeneration is called reclamation and regeneration of the used sand.

At present, Chinese patent with publication number CN108994255A discloses a waste sand regeneration process for sand casting, which comprises the following steps:

(1) and (3) dehumidification: exposing the molding sand in the sun for 3-4 hours, and removing 80-90% of water in the molding sand;

(2) crushing: placing the dehumidified molding sand into a crushing mechanism for crushing, so that the particle size of the molding sand is between 100 plus sand and 200 meshes;

(3) blanking: sending the crushed molding sand into a blanking hopper, and slowly dropping the molding sand onto a lower grinding device through the blanking hopper;

(4) grinding: under the drive of the driving part, the driving roller drives the driven roller to rotate, and the falling sand falling between the two rollers is ground to destroy a resin film on the surface of the molding sand, so that the particle size of the molding sand is between 50 and 100 meshes;

(5) removing impurities: the molding sand falls on a magnetic grid below the grinding device, and metal chips remained in the molding sand are removed through magnetic force;

(6) dust removal: and dust and gas in the grinding device are extracted through the induced draft fan.

Among this kind of foundry waste sand regeneration technology of sand casting, the grinding to the molding sand is through the mutual friction realization between drive roll and the driven voller, however when the molding sand gets into between drive roll and the driven voller, only tangent point pair grinding the molding sand between drive roll and the driven voller, and the grinding area is less, and the molding sand can't fully be ground, has the molding sand regeneration back, and the quality is still relatively poor defect.

Disclosure of Invention

The invention aims to provide a millstone regenerator for molding sand recovery, which has the advantages of enlarging the grinding area of molding sand and improving the regeneration treatment quality of the molding sand.

The technical purpose of the invention is realized by the following technical scheme:

a grinding disc regenerator for molding sand recovery, which comprises a base, wherein one side of the base is fixedly connected with a grinding box which is vertically communicated, the sand grinding box is higher than the base, one surface of the sand grinding box facing the base is provided with an inlet shaft through hole, the base is rotatably connected with a power shaft, one end of the power shaft enters the sand grinding box through the shaft-entering through hole, the base is provided with a driving motor for driving the power shaft to rotate, one end of the power shaft extending into the sand grinding box is fixedly sleeved with a rotary grinding disc, the side wall of the sand grinding box opposite to the power shaft is provided with a mounting opening, the mounting port is connected with a cover plate through a bolt, one surface of the cover plate facing the power shaft is fixedly connected with a fixed grinding disc, the fixed grinding disc and the rotating grinding disc are arranged in a clearance mode, the cover plate is connected with a sand inlet pipe, and the fixed grinding disc is provided with a sand inlet communicated with the sand inlet pipe.

Through adopting above-mentioned technical scheme, driving motor drive power shaft rotates, and power shaft drive rotates the mill and rotates, rotates and forms the motion each other between the fixed mill under rotary mill and the quiescent condition, and the staff will treat the molding sand that grinds this moment and let in the dull polish case through advancing the sand pipe in, the molding sand enters into between the clearance of rotary mill and fixed mill through advancing the sand mouth, under the interact power of rotary mill and fixed mill, realizes grinding. The molding sand that has been ground falls out through the bottom of the sand-grinding box by its own weight. When the molding sand is ground, the grinding is realized through the relative motion between the two plate surfaces of the rotating disc and the fixed disc, the grinding surfaces are the plate surfaces of the rotating disc and the fixed disc, and the area of the grinding surfaces is larger, so that the molding sand can be more fully ground, and the regeneration treatment quality of the molding sand is improved.

Furthermore, the top of the sand grinding box is connected with a top plate through a bolt, the top plate is communicated with a dust suction pipe, an isolation net is arranged in the dust suction pipe, and the aperture of a mesh of the isolation net is smaller than the grain size of sand grains.

Through adopting above-mentioned technical scheme, the dust absorption pipe is connected with outside fan, and the appeal of its production can be guided the raise dust that produces in the grinding process, has reduced operational environment's the dust volume of lifting by oneself of relaxing. The setting of the isolation net can isolate the molding sand, and the loss amount of the molding sand is reduced.

Further, the base includes the base and the board of accepting of laminating on the base, the four corners of accepting the board is link up respectively and is adjusted the waist hole, the length direction perpendicular to dull polish case of adjusting the waist hole passes and adjusts the waist hole and be equipped with adjusting bolt, adjusting bolt threaded connection is in the base, driving motor and power shaft set up on accepting the board.

By adopting the technical scheme, when the grinding quality of the molding sand is reduced, the worker unscrews the adjusting bolt and then pushes the bearing plate, so that the distance between the rotary grinding disc and the fixed grinding disc is reduced, the pressure on the molding sand is increased, and the grinding efficiency of the molding sand is improved; when the surface grinding transition of molding sand, the staff promotes accepts the board for the interval increase between rotatory mill and the fixed mill, thereby the pressure that makes the molding sand receive diminishes, with this friction that reduces the molding sand and receive. The staff can rotate the interval between mill and the fixed mill according to the grinding condition adjustment of molding sand for the grinding quality of molding sand is controllable.

Further, the one side that the rotation mill deviates from fixed mill is opened there is the heating ring groove, the heating ring groove is concentric with the rotation mill, the inside wall fixedly connected with heat transfer inside lining of heating ring groove, the inside wall fixedly connected with friction endotheca of mill sand box, the friction endotheca inserts heat transfer inside lining, friction fit between the two.

Through adopting above-mentioned technical scheme, at the rotation in-process that rotates the mill, the friction heat conduction between friction endotheca and the heat transfer inside lining gives the rotation mill, has thermal rotation mill and gives the molding sand with heat conduction, and the molding sand is heated, and its surperficial resin binder is heated and activates to this makes rotation mill and fixed mill can grind the molding sand more easily, has improved grinding efficiency.

Furthermore, a placing groove is formed in the outer side wall of the friction inner sleeve and is parallel to the axial direction of the friction inner sleeve, a friction strip is arranged in the placing groove and abuts against the heat transfer lining, a containing hole is formed in the bottom of the friction strip, a push-out pressure spring is arranged in the containing hole and abuts against the bottom of the placing groove.

Through adopting above-mentioned technical scheme, ejecting pressure spring can last exert external force to the friction strip for the friction strip contacts with heat transfer lining all the time, thereby has improved the thematic efficiency of friction.

Furthermore, the one side fixedly connected with heat conduction dish that the mill deviates from fixed mill rotates, heat conduction dish fixed connection is in heat transfer inside lining, heat conduction dish is towards rotating a plurality of heat conduction poles of one side fixedly connected with of mill, it has a plurality of heat conduction holes that are used for holding the heat conduction pole to rotate to open on the mill.

Through adopting above-mentioned technical scheme, the heat conduction dish can guide the heat of heat transfer inside lining, and the heat can evenly disperse to rotating in the mill under the guide of heat conduction pole to make the molding sand can be heated more evenly.

Furthermore, the side wall of the sand grinding box is communicated with an air inlet pipe, the air inlet pipe is located below the rotary grinding disc in the horizontal direction, and spiral turbulence blades are fixedly connected to the inner side wall of the air inlet pipe.

Through adopting above-mentioned technical scheme, at the during operation, the air-supply line is connected with the fan, and the air current that the fan produced is after through the vortex blade, is the heliciform and gets into in the mill sand box, and this air current gets into between the clearance of rotating the mill and fixed mill for the molding sand produces and rolls, and the molding sand under the state of rolling can receive the grinding more fully between rotating the mill and fixed mill.

Furthermore, the two opposite side surfaces of the rotating grinding disc and the fixed grinding disc are arranged in a concave mode.

Through adopting above-mentioned technical scheme, sunken setting can hold more molding sands to the grinding efficiency of molding sand in the unit interval has been improved.

In conclusion, the invention has the following beneficial effects:

1. the molding sand is ground through the relative motion between the two disc surfaces of the rotating disc and the fixed disc, the grinding surfaces are the disc surfaces of the rotating disc and the fixed disc, and the area of the grinding surfaces is large, so that the molding sand can be more fully ground, and the regeneration treatment quality of the molding sand is improved;

2. the friction heat generated by the friction inner sleeve is conducted to the rotary grinding disc, the rotary grinding disc with heat conducts the heat to the molding sand, the molding sand is heated, and the resin binder on the surface of the molding sand is heated and activated, so that the molding sand can be ground by the rotary grinding disc and the fixed grinding disc more easily, and the grinding efficiency is improved;

3. the air current of air-supply line gets into between the clearance of rotating the mill and fixed mill for the molding sand produces and rolls, and the molding sand under the state of rolling can receive the grinding more fully between rotating the mill and fixed mill.

Drawings

FIG. 1 is a schematic structural diagram for embodying the present invention;

FIG. 2 is a sectional view for embodying the internal structure of the flask;

fig. 3 is an enlarged view for embodying a portion a in fig. 2.

In the figure, 1, a base; 11. a base; 12. a bearing plate; 121. adjusting a waist hole; 13. adjusting the bolt; 2. grinding a sand box; 21. a shaft-entering through hole; 22. an installation port; 23. a cover plate; 24. a sand inlet pipe; 25. a top plate; 26. a dust collection pipe; 27. an isolation net; 28. an air inlet pipe; 281. a spoiler blade; 29. rubbing the inner sleeve; 3. a power shaft; 31. a driven pulley; 4. a drive motor; 41. a driving pulley; 42. a synchronous belt; 5. rotating the grinding disc; 51. heating the ring groove; 52. a heat transfer liner; 53. a heat conducting plate; 531. a heat conducting rod; 54. a heat conduction hole; 6. fixing the grinding disc; 7. rubbing the strips; 71. an accommodation hole; 72. and ejecting the pressure spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): the utility model provides a molding sand is retrieved with mill regenerating unit, refers to figure 1, includes base 1, the vertical dull polish case 2 that link up of one side fixedly connected with of base 1. The sand grinding box 2 is higher than the base 1, and one surface of the sand grinding box facing the base 1 is provided with an inlet shaft through hole 21. A power shaft 3 is rotatably connected to the base 1 through a bearing seat, and one end of the power shaft 3 enters the sand grinding box 2 through a shaft entering through hole 21.

Referring to fig. 1, a driving motor 4 is connected to a base 1 by bolts, and an output shaft of the driving motor 4 is arranged in parallel to a power shaft 3. One end of the power shaft 3, which is far away from the sand grinding box 2, is fixedly sleeved with a driven belt wheel 31, an output shaft of the driving motor 4 is fixedly sleeved with a driving belt wheel 41, and a synchronous belt 42 is connected between the driving belt wheel 41 and the driven belt wheel 31. The power shaft 3 is rotated through the cooperation of belt transmission.

Referring to fig. 2, one end of the power shaft 3 extending into the sand grinding box 2 is sleeved with a rotary grinding disc 5 in a key connection mode. The side wall of the sand grinding box 2 opposite to the power shaft 3 is provided with a mounting opening 22, the mounting opening 22 is connected with a cover plate 23 through a bolt, and one surface of the cover plate 23 facing the power shaft 3 is fixedly connected with a fixed grinding disc 6. The fixed grinding disc 6 and the rotating grinding disc 5 are positioned on the same horizontal height, and a gap is formed between the fixed grinding disc and the rotating grinding disc.

Referring to fig. 2, the cover plate 23 is connected with a sand inlet pipe 24, the sand inlet pipe 24 is communicated with the sanding box 2, and a sand inlet communicated with the sand inlet pipe 24 is arranged at the center of the fixed abrasive disk 6. When the molding sand is subjected to regeneration treatment, a worker starts the driving motor 4, the driving motor 4 drives the power shaft 3 to rotate, and the power shaft 3 drives the rotary grinding disc 5 to rotate. At this time, the molding sand to be processed is filled into the sand-grinding box 2 through the sand inlet pipe 24, and the molding sand enters the gap between the rotating grinding disc 5 and the fixed grinding disc 6 through the sand inlet. At this time, relative movement is generated between the rotating grinding disc 5 and the fixed grinding disc 6 in the rotating state, and the molding sand is ground therebetween, whereby the resin binder on the surface of the molding sand is removed. The molding sand that has been ground flows out through the opening in the bottom of the grinding flask 2.

Referring to fig. 1, the base 1 includes a base 11 and a receiving plate 12 attached to the base 11, and the driving motor 4 and the power shaft 3 are provided on the receiving plate 12. Adjusting waist holes 121 penetrate through four corners of the bearing plate 12 respectively, and the length direction of the adjusting waist holes 121 is perpendicular to the sanding box 2. An adjusting bolt 13 is arranged through the adjusting waist hole 121, and the adjusting bolt 13 is in threaded connection with the base 11.

Referring to fig. 1, before grinding the molding sand, a worker can adjust the distance between a rotating grinding disc 5 (see fig. 2) and a fixed grinding disc 6 (see fig. 2) according to the grain size of the molding sand. During adjustment, a worker unscrews the adjusting bolt 13, moves the bearing plate 12 at the moment, the bearing plate 12 drives the power shaft 3 to move, the power shaft 3 drives the rotary grinding disc 5 to move, and the distance between the rotary grinding disc 5 and the fixed grinding disc 6 is adjusted in the moving process. After the adjustment is completed, the worker tightens the adjusting bolt 13 to fasten the base 1.

Referring to fig. 2, the opposite side surfaces of the rotating grinding disc 5 and the fixed grinding disc 6 are recessed. After the concave setting, can hold more molding sand between the rotary grinding disc 5 and the fixed grinding disc 6 to make rotary grinding disc 5 and fixed grinding disc 6 grind more molding sand surfaces in unit time, improved the regeneration treatment efficiency of molding sand.

Referring to fig. 2, the top of the sanding box 2 is connected by bolts and has a top plate 25, and the top plate 25 is communicated with a dust suction pipe 26. An isolation net 27 is fixedly linked in the dust suction pipe 26, and the aperture of the mesh of the isolation net 27 is smaller than the grain size of sand grains. During the grinding of the molding sand, dust generated by the grinding fills the sanding box 2. The worker connects the dust suction pipe 26 to an external suction fan, the dust in the sand box 2 flows out of the sand box 2 by the suction of the fan, and the sand in the sand box 2 is still in the sand box 2 by the obstruction of the isolation net 27. The arrangement of the dust suction pipe 26 reduces dust generated in the working process of the invention and improves the cleanness degree of the working environment.

Referring to fig. 1, the side wall of the grinding box 2 is communicated with an air inlet pipe 28, the air inlet pipe 28 is horizontally positioned below the rotary grinding disc 5 (refer to fig. 2), and spiral turbulence blades 281 are fixedly connected to the inner side wall of the air inlet pipe 28. In the operating state, the air inlet pipe 28 is connected to an external fan, and the air flow generated by the fan enters the sand grinding box 2 in a spiral shape after passing through the spoiler blade 281. The molding sand can be blown away by the air flow, so that the molding sand can be more comprehensively ground by the rotary grinding disc 5 and the fixed grinding disc 6 (see fig. 2), and the grinding effect of the molding sand is improved.

Referring to fig. 2, a heating ring groove 51 is annularly formed on one surface of the rotating grinding disc 5, which is far away from the fixed grinding disc 6, and the heating ring groove 51 and the rotating grinding disc 5 are concentrically arranged. The inner side wall of the heating ring groove 51 is fixedly connected with a heat transfer lining 52 made of aluminum. The friction inner sleeve 29 is fixedly connected with the inner side wall of the sand grinding box 2, the friction inner sleeve 29 is inserted into the heat transfer lining 52, and the friction fit is formed between the friction inner sleeve 29 and the heat transfer lining 52.

Referring to fig. 2 and 3, the outer side wall of the friction inner sleeve 29 is provided with a placement groove, and the placement groove is parallel to the axial direction of the friction inner sleeve 29. The friction strips 7 are arranged in the placing grooves, and in order to improve the wear resistance of the friction strips 7, the friction strips 7 are made of bearing steel. The bottom of the friction strip 7 is provided with a containing hole 71, a push-out pressure spring 72 is arranged in the containing hole 71, and the push-out pressure spring 72 is abutted against the groove bottom of the placing groove. The friction bar 7 is abutted against the heat transfer lining 52 by the resilience of the ejecting pressure spring 72.

Referring to fig. 2, a heat conducting plate 53 is fixedly connected to a surface of the rotating grinding disc 5 facing away from the fixed grinding disc 6, and the heat conducting plate 53 is fixedly connected to the heat conducting lining 52. One surface of the heat conducting disc 53 facing the rotating grinding disc 5 is fixedly connected with a plurality of heat conducting rods 531, and the rotating grinding disc 5 is provided with a plurality of heat conducting holes 54 for accommodating the heat conducting rods 531.

Referring to fig. 2, the heat transfer liner 52 rotates along with the rotating disc 5 during the rotation of the rotating disc 5, friction is formed between the heat transfer liner 52 and the friction bar 7 during the rotation, heat generated during the friction is conducted to the heat conduction rod 531 through the heat conduction disc 53, and the heat conduction rod 531 conducts the heat to the rotating disc 5 through the heat conduction hole 54. Have thermal rotation mill 5 and can heat the molding sand for the resin binder on molding sand surface is activated, with this reduction to grind the degree of difficulty of resin binder, has improved the regeneration treatment effect of molding sand.

The specific implementation process comprises the following steps: when the sand mold regeneration treatment is carried out, a worker starts the driving motor 4, the driving motor 4 is utilized to drive the power shaft 3 to rotate, and the power shaft 3 drives the rotary grinding disc 5 to rotate in the rotating process. At this time, the molding sand is fed toward between the rotating abrasive disk 5 and the fixed abrasive disk 6 through the sand feed pipe 24, and the molding sand is ground between the rotating abrasive disk 5 and the fixed abrasive disk 6. The in-process of grinding the molding sand, through the intake pipe input air current in the sand box 2 of mill orientation, the air current makes the molding sand dispersion to this makes the molding sand obtain more abundant grinding.

In addition, in the process of rotating the rotary millstone 5, the friction heat generated between the friction strip 7 and the heat transfer lining 52 is transferred to the rotary millstone 5 through the heat conduction disc 53, the rotary millstone 5 conducts the heat to the molding sand, and the molding sand is heated, so that the resin adhesive on the surface of the molding sand is activated, the difficulty of grinding the resin adhesive is reduced, and the regeneration treatment effect of the molding sand is improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, 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 invention.

Claims

1. The utility model provides a molding sand is retrieved with mill regenerator which characterized in that: the sand grinding machine comprises a base (1), one side of the base (1) is fixedly connected with a vertically-through sand grinding box (2), the sand grinding box (2) is higher than the base (1), one side, facing the base (1), of the sand grinding box (2) is provided with an axle through hole (21), the base (1) is rotatably connected with a power shaft (3), one end of the power shaft (3) enters the sand grinding box (2) through the axle through hole (21), the base (1) is provided with a driving motor (4) for driving the power shaft (3) to rotate, one end, extending into the sand grinding box (2), of the power shaft (3) is fixedly sleeved with a rotating grinding disc (5), the side wall, facing the power shaft (3), of the sand grinding box (2) is provided with a mounting opening (22), the mounting opening (22) is connected with a cover plate (23) through a bolt, the cover plate (23) is fixedly connected with a fixed grinding disc (6) facing the power shaft (3), the fixed mill (6) and the clearance setting between rotation mill (5), be connected with into sand pipe (24) on apron (23), fixed mill (6) go up to open have with advance the communicating sand mouth of sand pipe (24), the one side that deviates from fixed mill (6) of rotation mill (5) is opened has heating ring groove (51), heating ring groove (51) and rotation mill (5) are concentric, the inside wall fixedly connected with heat transfer inside lining (52) of heating ring groove (51), the inside wall fixedly connected with friction endotheca (29) of mill sand box (2), heat transfer inside lining (52) are inserted in friction endotheca (29), friction fit between the two, the lateral wall of friction endotheca (29) is opened there is the standing groove, the axial direction parallel of standing groove and friction endotheca (29), be equipped with friction strip (7) in the standing groove, friction strip (7) contradict in heat transfer inside lining (52), the bottom of the friction strip (7) is provided with an accommodating hole (71), an ejection compression spring (72) is arranged in the accommodating hole (71), and the ejection compression spring (72) is abutted against the bottom of the placing groove.

2. The sand-reclaiming millstone regenerator according to claim 1, characterized in that: the top of the sand grinding box (2) is connected with a top plate (25) through a bolt, the top plate (25) is communicated with a dust suction pipe (26), an isolation net (27) is arranged in the dust suction pipe (26), and the aperture of a mesh hole of the isolation net (27) is smaller than the grain size of sand grains.

3. The sand-reclaiming millstone regenerator according to claim 1, characterized in that: base (1) includes base (11) and the board (12) of accepting of laminating on base (11), the four corners of accepting board (12) link up respectively and have adjusted waist hole (121), the length direction perpendicular to dull polish case (2) of adjusting waist hole (121), pass and adjust waist hole (121) and be equipped with adjusting bolt (13), adjusting bolt (13) threaded connection is in base (11), driving motor (4) and power shaft (3) set up on accepting board (12).

4. The sand-reclaiming millstone regenerator according to claim 1, characterized in that: rotate one side fixedly connected with heat conduction dish (53) that mill (5) deviate from fixed mill (6), heat conduction dish (53) fixed connection is in heat transfer inside lining (52), heat conduction dish (53) are towards rotating a plurality of heat conduction poles (531) of one side fixedly connected with of mill (5), it has a plurality of heat conduction holes (54) that are used for holding heat conduction pole (531) to open on rotation mill (5).

5. The sand-reclaiming millstone regenerator according to claim 1, characterized in that: the side wall of the sand grinding box (2) is communicated with an air inlet pipe (28), the air inlet pipe (28) is located below the rotary grinding disc (5) in the horizontal direction, and the inner side wall of the air inlet pipe (28) is fixedly connected with a spiral turbulence blade (281).

6. The sand-reclaiming millstone regenerator according to claim 1, characterized in that: the two opposite side surfaces of the rotating grinding disc (5) and the fixed grinding disc (6) are arranged in a concave manner.