CN112496260A

CN112496260A - Sand casting waste residue sand separating centrifuge

Info

Publication number: CN112496260A
Application number: CN202011352755.XA
Authority: CN
Inventors: 张远帮
Original assignee: Hanshan Yongbang Renewable Resources Utilization Co ltd
Current assignee: Hanshan Yongbang Renewable Resources Utilization Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-03-16

Abstract

The invention discloses a sand casting waste residue and sand separating machine, wherein a support frame is respectively connected to two ends of a base, a rotary drum is positioned at the upper end of the support frame, and two ends of the rotary drum are respectively provided with a shaft sleeve; a rotating shaft axially penetrates through the interior of the rotating drum, two ends of the rotating shaft respectively extend out of shaft sleeves at two ends of the rotating drum and penetrate through shaft sleeves at the upper end of the supporting frame, and a plurality of groups of cutting blades are fixedly connected to the rotating shaft in the interior of the rotating drum; vertical guide rods are respectively arranged at two ends of the inner side of the support frame, the lower ends of the guide rods are fixedly connected with the base, and a plurality of groups of sliding block groups capable of moving up and down along the guide rods are arranged on the guide rods; a plurality of groups of screen boxes are arranged below the rotary drum, and two ends of each screen box are fixedly connected with the sliding block groups; gear sets are arranged at two ends of the rotating shaft, one end of the movable connecting rod is connected to the side end of the gear, and the other end of the movable connecting rod is connected to the side end of the sliding block set; according to the invention, through multi-stage screening, the casting waste residues and the molding sand can be thoroughly separated, the surface cleanliness of the casting waste residues is improved, and the casting waste residues and the molding sand are synchronously collected.

Description

Sand casting waste residue sand separating centrifuge

Technical Field

The invention relates to the technical field of sand casting, in particular to a waste residue and sand separating machine for sand casting.

Background

Sand casting refers to a common casting method for producing castings in sand molds, which is to melt metal into liquid by using molding sand as a casting mold material, pour the liquid into a casting mold by using a pouring system, and obtain castings with preset shapes, sizes and properties after cooling, solidification and finishing treatment. The molding material used for sand casting is cheap and easy to obtain, the casting mold is simple and convenient to manufacture, the application range of the casting is wide, and the method is not only suitable for single-piece production, but also capable of realizing mass production of multiple pieces, and is a main process in casting production. After the sand mold casting process is completed, casting-state metal, commonly called as casting waste residues, usually remains in a gating system or casting sand, and the casting waste residues can be reused for casting after smelting, so that the production cost is reduced. Waste residue and molding sand are separated in a manual sorting mode, sorting is not clean, efficiency is low, and labor cost is increased.

The utility model discloses a casting waste material molding sand separator of publication number CN209050058U among the prior art, through roll separation casting waste residue and molding sand, the collection boxcar sets up on the base of cylinder below, is equipped with the side baffle on the both sides wall of collection boxcar respectively, can prevent that the molding sand from spattering outward. However, the roller of the patent is only partially positioned inside the collection box car, and although the molding sand can be prevented from splashing to a certain extent, no baffle is arranged above the roller, and the molding sand is easy to splash from the upper side of the roller.

The utility model discloses a casting waste residue separating centrifuge of publication number CN210966841U among the prior art, its separation barrel be both ends inclosed tube structure, places a plurality of steel balls in the separation barrel, utilizes the mechanical collision of steel ball to hit garrulous molding sand, realizes the separation of waste residue and molding sand. However, after the separator of the patent is finished, although the molding sand is extruded out through the through hole of the cylinder, the steel balls and the casting waste residues still exist in the cylinder at the same time, extra time is needed for sorting the steel balls and the waste residues, and the workload is increased to a certain extent.

The utility model with the publication number of CN209550586U in the prior art is a sand separating mechanism for sand casting waste, which realizes the cleaning of molding sand on the surface of casting waste slag by utilizing the back-and-forth movement of a movable brush, but the patent has two limitations, namely, the movable brush can only move back-and-forth on one horizontal dimension, and the shapes and the sizes of blocky casting waste slag are always different, so the cleaning range of the brush is limited; on the other hand, the molding sand that only can clear away the easy clearance in waste residue surface relies on the round trip movement of brush alone, and most molding sand firmly inlays on the waste residue surface, and ordinary brush is difficult to clear away totally.

The sand mold casting waste residue molding sand separation equipment in the prior art has the following defects:

1. most of devices in the prior art adopt roller separation, but molding sand is easy to splash and pollute the environment;

2. most of devices in the prior art only rely on a single physical mode to realize the separation of waste residues and molding sand, such as the simple rotation of a roller, the crushing of steel balls or the cleaning of brushes, and the like, and the separation effect is limited.

3. In the prior art, only the casting waste slag is collected for repeated smelting, and the separated molding sand is not subjected to further screening and collection.

Disclosure of Invention

In order to solve the problems, the invention provides a sand mold casting waste residue and sand separating machine which comprises a base, a support frame, a rotary drum, a sieve box, a sand receiving vehicle and a housing, wherein the support frame is respectively connected to two ends of the base; a rotating shaft axially penetrates through the interior of the rotating drum, two ends of the rotating shaft respectively extend out of the shaft sleeves at two ends of the rotating drum and penetrate through the shaft sleeves at the upper end of the supporting frame, and a plurality of groups of cutting blades are fixedly connected to the rotating shaft in the interior of the rotating drum; a motor is arranged on one side of the support frame, and the output end of the motor is fixedly connected with one end of the rotating shaft; vertical guide rods are respectively arranged at two ends of the inner side of the support frame, the lower ends of the guide rods are fixedly connected with the base, and a plurality of groups of sliding block groups capable of moving up and down along the guide rods are arranged on the guide rods; a plurality of groups of screen boxes are arranged below the rotary drum, and two ends of each screen box are fixedly connected with the sliding block groups; gear sets are arranged at two ends of the rotating shaft, each gear set comprises a plurality of gears which are different in radius and meshed with each other, movable connecting rods which are in one-to-one correspondence with the sliding block sets are arranged on the gears, one ends of the movable connecting rods are connected to the side ends of the gears, the other ends of the movable connecting rods are connected to the side ends of the sliding block sets, and the movable connecting rods drive the sliding block sets to move up and down along the guide rods along with the rotation of the gears; the sand receiving truck is positioned on the base below the screen box; the housing is closed and covers the rotary drum and the screen box.

The purpose of the application can be further realized by the following technical scheme:

in one embodiment, the rotary drum is in a prism shape, the side surfaces of the prism are made of steel plates, one side surface of the prism is provided with an openable and closable feeding and discharging door, the other side surfaces of the prism are provided with hollowed-out grid plates, and the surfaces of the grid plates are provided with uniform meshes. The casting waste mixed with the molding sand is crushed by the rotation of the cutting blade, and a part of the waste and the molding sand can be screened out from the mesh holes.

In a preferred embodiment, the prism is a hexagonal prism, the number of the grid plates is three, and the grid plates are distributed on three sides of the hexagonal prism at intervals. The advantage of this design is that the casting waste can be further broken up by fully colliding with the steel plate in the drum, which is beneficial for the separation of the molding sand.

In one embodiment, the sieve box can be divided into a first sieve box, a second sieve box and a third sieve box along the direction from top to bottom, the sieve box is in a square groove shape, the periphery of the square groove shape is provided with steel plates, the bottom surface is provided with a sieve mesh, and the sieve mesh can be detached; the mesh range of the first screen box screen is 10-50 meshes, the mesh range of the second screen box screen is 50-100 meshes, and the mesh range of the third screen box screen is 100-200 meshes; defining the amplitudes and frequencies of the first, second and third sieve boxes in operation as H1, H2, H3 and f1, f2, f3, respectively, then H1, H2, H3 and f1, f2, f3 satisfy the following relationships, respectively: h1 & gtH 2 & gtH 3, f1 & lt f2 & lt f 3. The design has the advantages that the casting waste slag separated from the rotary drum is further screened step by step through the screen box, the casting waste slag and the molding sand can be thoroughly separated, and the recovered casting waste slag can be continuously used for sand mold casting; in addition, the smaller the screen mesh number is, the larger the amplitude of the corresponding screen box is, the lower the vertical vibration frequency is, the larger the screen mesh number is, the smaller the amplitude of the corresponding screen box is, the higher the vertical vibration frequency is, the design is favorable for layering and vibration of screened objects, and the screening capacity of the screened objects is improved.

In one embodiment, the gear set comprises a driving gear, a first gear, a second gear and a third gear, which are vertically arranged in sequence, wherein the driving gear is engaged with the first gear, the first gear is engaged with the second gear, and the second gear is engaged with the third gear; the center of the driving gear is fixedly connected with the rotating shaft, and the centers of the first gear, the second gear and the third gear are respectively provided with a central shaft which is fixedly connected; the upper end of the guide rod is sequentially provided with three groups of shaft sleeves from top to bottom, and the central shafts are respectively connected with the shaft sleeves in a one-to-one correspondence manner; the radii of the first gear, the second gear and the third gear are defined as R1, R2 and R3, respectively, R1, R2 and R3 satisfy the following relationships: r1 < R2 < R3.

In one embodiment, a guide wheel is arranged inside the slider group, and the guide wheel is matched with the guide rod to realize the movement of the slider group; along from last direction extremely down, the slider component is first slider, second slider and third slider, wherein first slider with first sieve case fixed connection, the second slider with second sieve case fixed connection, the third slider with third sieve case fixed connection.

In one embodiment, the movable link includes a first link, a second link, and a third link, the first gear is connected to the third sieve box through the first link, the second gear is connected to the second sieve box through the second link, and the third gear is connected to the first sieve box through the third link.

In one embodiment, the side end of the gear is provided with a positioning hole at a certain distance from the center of the gear, one end of the movable link is provided with a positioning shaft matched with the positioning hole, and the distances between the positioning holes of the first gear, the second gear and the third gear and the centers of the respective gears are defined as L1, L2 and L3, respectively, then L1, L2 and L3 satisfy the following relations: l1 < L2 < L3, when the amplitudes of the first, second and third sieve boxes in operation H1, H2, H3 satisfy the following mathematical relationship: h1=2L1, H2=2L2, H3=2L 3. The above design has the advantages that the driving gear fixedly connected with the rotating shaft rotates to drive the gears at all levels to rotate, the linear speeds of the gears at all levels are consistent due to the meshing of the gears, and the moving periods and frequencies of the gears at all levels are different due to the different radiuses of the gears at all levels, the movable connecting rod on the gears at all levels drives the sliding block to move up and down along the guide rod, so that the screen box moves up and down, namely, the synchronous design of the amplitude and the frequency of the screen box can be realized by designing the relevant parameters of the gears and the rotating speed of the rotating shaft.

In a preferred embodiment, the gear is provided with the positioning holes with different distances, the movable connecting rod can be assembled in different positioning holes, and the amplitude of the sieve box can be further finely adjusted according to actual requirements.

In one embodiment, a fixed gear fixedly connected with the rotary drum is arranged at the side end of the rotary drum, and the rotary shaft penetrates through the center of the fixed gear; the central shaft of the second gear extends out of the shaft sleeve in the guide rod, a second auxiliary gear fixedly connected with the tail end of the central shaft is arranged at the tail end of the central shaft, the second auxiliary gear and the second gear rotate in the same direction, and the second auxiliary gear is meshed with the fixed gear. The advantage of this kind of design is that can realize the pivot forward rotation while, the rotary drum carries out the reverse rotation in step, namely cutting blade's direction of rotation and the direction of rotation of rotary drum are opposite, can further promote the abundant breakage of casting waste residue and molding sand, promote separation efficiency, do benefit to follow-up screening.

In a preferred embodiment, when the fixed gear is defined to have a radius of R4 and the second counter gear is defined to have a radius of R5, R4 and R5 satisfy the following relationship: r4 < R5. The advantage of this design is that the movement period of the drum can be further reduced, and the screening efficiency of the drum can be improved.

In one embodiment, the casing is provided with a semi-closed inner shell inside, the inner shell covers the rotating drum, the side surface of the inner shell is in an inverted water drop shape with a round top and a sharp bottom, and an opening below the inner shell is aligned with the position right above the first screen box. The advantage of this kind of design is that the casting waste residue that the rotary drum splashes outward and molding sand are all collected in the opening part of inner shell below to through the inside of opening whole inflow first sieve case, avoided the outer splash of casting waste residue and molding sand all-roundly, promoted work efficiency.

In a preferred embodiment, a lifting hook is arranged above the shell, so that the lifting is convenient.

In one embodiment, the bottom of the sand receiving vehicle is provided with four groups of universal wheels, and the side surface of the sand receiving vehicle is provided with a handle.

The technical scheme of the invention has the following beneficial effects:

1. the separator is provided with the rotary drum and the screen boxes, casting waste residues and molding sand are fully crushed and separated through the rotary drum, and the screen boxes are utilized for further screening step by step, so that the high-efficiency separation of the casting waste residues and the molding sand is realized, the screen boxes with different meshes can be utilized for collecting reusable waste residues, the completely separated molding sand is collected, the waste residues are repeatedly recycled, the production cost of enterprises is reduced, and the working efficiency is greatly improved.

2. The rotating directions of the rotary drum and the cutting blade of the separator are opposite, so that the full crushing of the casting waste residues and the casting sand can be further promoted, the separation efficiency is improved, and the subsequent further screening is facilitated.

3. The screen box of the separator is provided with different amplitudes and frequencies, so that the layering and the vibration of screened objects are facilitated, and the screening capacity of the screened objects is improved.

4. The separator is provided with a plurality of groups of gear sets, movable connecting rods and sliding block structures, can realize the reverse rotation of the rotary drum and the rotary shaft simultaneously and control different screen boxes to work under different amplitudes and frequencies simultaneously only by one motor, does not need to be additionally provided with other motors to participate in the work, and has simple equipment structure and multiple functions.

5. The semi-closed inner shell is arranged on the housing of the separator, the side surface of the inner shell is in a shape of inverted water drops with round upper part and sharp lower part, the opening below the inner shell is aligned to the right upper part of the first sieve box, when the working chamber of the rotary drum is used, all casting waste residues and molding sand splashed out by the rotary drum are collected at the opening below the inner shell and flow into the first sieve box through the opening, so that the casting waste residues and the molding sand are prevented from splashing outside in all directions, and the working efficiency is improved.

Drawings

The invention further explains a waste residue and sand separating machine for sand casting by a concrete embodiment and a drawing.

FIG. 1 is a three-dimensional view of a sand-casting waste-sand separator according to the present invention without a housing;

FIG. 2 is a front view of FIG. 1 showing the interior of the drum;

FIG. 3 is a three-dimensional view of a sand casting waste sand separator with a housing;

FIG. 4 is a partial view of a sand-casting waste-residue-sand separator according to the present invention, showing the structural relationship of the gear set, the slider set and the movable connecting rod;

FIG. 5 is a partial side view of FIG. 4;

FIG. 6 is an enlarged view of detail I of FIG. 4 showing the guide wheels in the slider group;

FIG. 7 is a partial side view of FIG. 3 showing an inner shell construction of the outer shell.

In the figure, a sand casting waste sand separator 1, a support frame 10, a base 11, a rotary drum 12, a screen box 13, a gear set 14, a sand receiving vehicle 15, a cover 16, a shaft sleeve 100, a motor 101, a guide rod 110, a slider group 111, a movable link 112, a rotary shaft 120, a cutting blade 121, a feeding and discharging door 122, a grid plate 123, a fixed gear 124, a steel plate 130, a first screen box 131, a second screen box 132, a third screen box 133, a driving gear 140, a first gear 141, a second gear 142, a third gear 143, a second counter gear 144, a central shaft 145, a positioning shaft 146, a universal wheel 150, a hook 151, a handle 152, an inner shell 161, a guide wheel 1110, a first slider 1111, a second slider 1112, a third slider 1113, a positioning hole 1120, a first link 1121, a second link 1122, a third link 1123, a mesh 1230 and a screen 1301.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings and the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, high, and low … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 3, a sand mold casting waste residue and sand separating machine comprises a base, a support frame, a rotary drum, a screen box, a sand receiving vehicle and a housing, wherein the support frame is respectively connected to two ends of the base; a rotating shaft axially penetrates through the interior of the rotating drum, two ends of the rotating shaft respectively extend out of shaft sleeves at two ends of the rotating drum and penetrate through shaft sleeves at the upper end of the supporting frame, and a plurality of groups of cutting blades are fixedly connected to the rotating shaft in the interior of the rotating drum; one side of the support frame is provided with a motor, and the output end of the motor is fixedly connected with one end of the rotating shaft; vertical guide rods are respectively arranged at two ends of the inner side of the support frame, the lower ends of the guide rods are fixedly connected with the base, and a plurality of groups of sliding block groups capable of moving up and down along the guide rods are arranged on the guide rods; a plurality of groups of screen boxes are arranged below the rotary drum, and two ends of each screen box are fixedly connected with the sliding block groups; the two ends of the rotating shaft are provided with gear sets, each gear set comprises a plurality of gears which are different in radius and meshed, the gears and the sliding block sets are provided with movable connecting rods which are in one-to-one correspondence, one ends of the movable connecting rods are connected to the side ends of the gears, the other ends of the movable connecting rods are connected to the side ends of the sliding block sets, and the movable connecting rods drive the sliding block sets to move up and down along the guide rods along with; the sand receiving truck is positioned on the base below the screen box; the cover is closed and covers the rotary drum and the screen box.

In one embodiment, the rotary drum is in a prism shape, the side surfaces of the prism are made of steel plates, one side surface of the prism is provided with an openable and closable feeding and discharging door, the other side surfaces of the prism are provided with hollowed-out grid plates, and the surfaces of the grid plates are provided with uniform meshes. The foundry waste mixed with the molding sand is crushed by the rotation of the cutting blade, and a part of the waste and the molding sand can be screened out from the mesh holes, as shown in fig. 1 and 2.

In a preferred embodiment, the prism is a hexagonal prism, the number of the grid plates is three, and the grid plates are distributed on three sides of the hexagonal prism at intervals. The advantage of this kind of design lies in, and the casting waste residue can further smash the casting waste residue through the steel sheet abundant collision in with the rotary drum, is favorable to the separation of molding sand.

In one embodiment, the sieve box can be divided into a first sieve box, a second sieve box and a third sieve box along the direction from top to bottom, the sieve box is in a square groove shape, the periphery of the square groove shape is provided with steel plates, the bottom surface is provided with a screen, and the screen can be detached, as shown in fig. 1 and 2; the mesh range of the first screen box is 10-50 meshes, the mesh range of the second screen box is 50-100 meshes, and the mesh range of the third screen box is 100-200 meshes; defining the amplitudes and frequencies of the first, second and third sieve boxes in operation as H1, H2, H3 and f1, f2, f3 respectively, then H1, H2, H3 and f1, f2, f3 respectively satisfy the following relations: h1 & gtH 2 & gtH 3, f1 & lt f2 & lt f 3. The design has the advantages that the casting waste residue separated from the rotary drum is further screened step by step through the screen box, the casting waste residue and the molding sand can be thoroughly separated, and the recovered casting waste residue can be continuously used for sand mold casting; in addition, the smaller the mesh number of the screen is, the larger the amplitude of the corresponding screen box is, and the lower the vertical vibration frequency is, while the larger the mesh number of the screen is, the smaller the amplitude of the corresponding screen box is, and the higher the vertical vibration frequency is, so that the design is favorable for layering and vibration of the screened object, and the screening capacity of the screened object is improved.

In one embodiment, the gear set comprises a driving gear, a first gear, a second gear and a third gear which are vertically arranged in sequence along the direction from top to bottom, wherein the driving gear is meshed with the first gear, the first gear is meshed with the second gear, and the second gear is meshed with the third gear; the center of the driving gear is fixedly connected with the rotating shaft, and the centers of the first gear, the second gear and the third gear are respectively provided with a central shaft which is fixedly connected; the upper end of the guide rod is sequentially provided with three groups of shaft sleeves from top to bottom, and the central shafts are respectively connected with the shaft sleeves in a one-to-one correspondence manner; the radii of the first gear, the second gear and the third gear are defined as R1, R2 and R3, respectively, R1, R2 and R3 satisfy the following relationships: r1 < R2 < R3, as shown in FIGS. 4 and 5.

In one embodiment, a guide wheel is arranged inside the slider group, and the guide wheel and the guide rod are matched to realize the movement of the slider group as shown in fig. 6; along from last direction extremely down, the slider group is first slider, second slider and third slider, and wherein first slider and first sieve case fixed connection, second slider and second sieve case fixed connection, third slider and third sieve case fixed connection.

In one embodiment, the movable link includes a first link, a second link, and a third link, the first gear is connected to the third sieve box through the first link, the second gear is connected to the second sieve box through the second link, and the third gear is connected to the first sieve box through the third link, as shown in fig. 1 and 2.

In one embodiment, the side end of the gear is provided with a positioning hole at a certain distance from the center of the gear, and one end of the movable link is provided with a positioning shaft matched with the positioning hole, as shown in fig. 4, distances between the positioning holes of the first gear, the second gear and the third gear and the centers of the respective gears are respectively defined as L1, L2 and L3, and then L1, L2 and L3 satisfy the following relations: l1 < L2 < L3, when the amplitudes of the first, second and third sieve boxes in operation H1, H2, H3 satisfy the following mathematical relationships: h1=2L1, H2=2L2, H3=2L 3. The above design has the advantages that the driving gear fixedly connected with the rotating shaft rotates to drive the gears at all levels to rotate, the linear speeds of the gears at all levels are consistent due to gear meshing, the motion periods and the frequencies of the gears at all levels are different due to different radiuses of the gears at all levels, the movable connecting rods on the gears at all levels drive the sliding blocks to move up and down along the guide rods, and then the screen box moves up and down, namely, the synchronous design of the amplitude and the frequency of the screen box can be realized by designing relevant parameters of the gears and the rotating speed of the rotating shaft.

In a preferred embodiment, the gear is provided with positioning holes with different distances, the movable connecting rod can be assembled in different positioning holes, and the amplitude of the screen box can be further finely adjusted according to actual requirements.

In one embodiment, a fixed gear fixedly connected with the rotary drum is arranged at the side end of the rotary drum, and the rotary shaft penetrates through the center of the fixed gear; the central shaft of the second gear extends out of the shaft sleeve in the guide rod, and a second auxiliary gear fixedly connected with the tail end of the central shaft is arranged at the tail end of the central shaft, the second auxiliary gear and the second gear rotate in the same direction, and the second auxiliary gear is meshed with the fixed gear, as shown in fig. 1 and 4. The advantage of this kind of design lies in, can realize the pivot forward rotation while, the rotary drum carries out the antiport in step, and cutting blade's direction of rotation and the direction of rotation of rotary drum are opposite promptly, can further promote the abundant breakage of casting waste residue and molding sand, promote separation efficiency, do benefit to follow-up screening.

In a preferred embodiment, defining the fixed gear radius as R4 and the second sub-gear radius as R5, R4 and R5 satisfy the following relationship: r4 < R5. The advantage of this kind of design is that can further reduce the motion cycle of rotary drum, promote the screening efficiency of rotary drum.

In one embodiment, the inside of the casing is provided with a semi-closed inner shell which covers the rotating drum, the side surface of the inner shell is in a shape of inverted water drop with a round top and a sharp bottom, and an opening below the inner shell is aligned with the right top of the first screen box, as shown in fig. 7. The advantage of this kind of design lies in, and the casting waste residue and the molding sand that the rotary drum splashes outward are all collected at the opening part of inner shell below to inside through the whole first sieve incasement portions that flow in of opening, the outer splash of casting waste residue and molding sand has been avoided to the all-round, has promoted work efficiency.

In one embodiment, the bottom of the sand-receiving vehicle is provided with four groups of universal wheels, and the side surface of the sand-receiving vehicle is provided with a handle, as shown in figure 2.

The working principle of the sand mold casting waste residue and sand separating machine provided by the invention is as follows:

when the device is used, a feeding and discharging door of the rotary drum is opened, a mixture of casting waste residues and molding sand is poured into the rotary drum, the feeding and discharging door is closed, the housing and the cover are separated by the travelling crane, a power supply is switched on, the motor starts to operate, the output shaft of the motor drives the rotary shaft to rotate, meanwhile, the driving gear fixedly connected with the rotary shaft drives the gears at all stages meshed with the rotary shaft to rotate, the gears at all stages drive the sliding blocks at all stages to move up and down along the guide rod through the movable connecting rod, the gears at all stages synchronously move up and down with the sieve boxes fixedly connected with the sliding blocks at all stages, and at the moment, the rotary; the mixture that casting waste residue and molding sand are constituteed is at the inside abundant cutting breakage of rotating blade of rotary drum, and outwards spill through the net board of rotary drum side under the effect of centrifugal force, the mixture that spatters outward contacts with the inner shell of housing, and through the opening of inner shell below, flow in the first sieve case under the rotary drum, through the vibration screening, the mixture shines out from the screen cloth of first sieve case, and flow in the second sieve case, so on and so on, until the molding sand by the complete segregation, and flow in the sand receiving vehicle under through the screen cloth of third sieve case. After the work is accomplished, will connect the molding sand transfer in the sand car to shift out, put the empty wagon back to sieve bottom of the case portion again, dismantle the screen cloth of sieve bottom of the case portion at all levels in proper order again and open the feeding discharge gate of rotary drum, stay the casting waste residue in rotary drum and the sieve incasement at all levels can fall into rapidly and connect the sand car, realize the collection of casting waste residue.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A sand casting waste residue and sand separating machine comprises a base, a support frame, a rotary drum, a screen box, a sand receiving vehicle and a housing, wherein the support frame is respectively connected to two ends of the base; a rotating shaft axially penetrates through the interior of the rotating drum, two ends of the rotating shaft respectively extend out of the shaft sleeves at two ends of the rotating drum and penetrate through the shaft sleeves at the upper end of the supporting frame, and a plurality of groups of cutting blades are fixedly connected to the rotating shaft in the interior of the rotating drum; a motor is arranged on one side of the support frame, and the output end of the motor is fixedly connected with one end of the rotating shaft; vertical guide rods are respectively arranged at two ends of the inner side of the support frame, the lower ends of the guide rods are fixedly connected with the base, and a plurality of groups of sliding block groups capable of moving up and down along the guide rods are arranged on the guide rods; a plurality of groups of screen boxes are arranged below the rotary drum, and two ends of each screen box are fixedly connected with the sliding block groups; gear sets are arranged at two ends of the rotating shaft, each gear set comprises a plurality of gears which are different in radius and meshed with each other, movable connecting rods which are in one-to-one correspondence with the sliding block sets are arranged on the gears, one ends of the movable connecting rods are connected to the side ends of the gears, the other ends of the movable connecting rods are connected to the side ends of the sliding block sets, and the movable connecting rods drive the sliding block sets to move up and down along the guide rods along with the rotation of the gears; the sand receiving truck is positioned on the base below the screen box; the housing is closed and covers the rotary drum and the screen box.

2. The sand mold casting waste residue sand separating machine according to claim 1, characterized in that: the rotary drum is prismatic, the side of the prism is composed of steel plates, one side of the prism is provided with a feeding and discharging door which can be opened and closed, the other sides of the prism are provided with hollowed grid plates, and the surfaces of the grid plates are provided with uniform meshes.

3. The sand mold casting waste residue sand separating machine according to claim 1, characterized in that: the screen box can be divided into a first screen box, a second screen box and a third screen box along the direction from top to bottom, the screen box is in a square groove shape, steel plates are arranged on the periphery of the square groove shape, a screen is arranged on the bottom surface of the square groove shape, and the screen can be detached; the mesh range of the first screen box screen is 10-50 meshes, the mesh range of the second screen box screen is 50-100 meshes, and the mesh range of the third screen box screen is 100-200 meshes; defining the amplitudes and frequencies of the first, second and third sieve boxes in operation as H1, H2, H3 and f1, f2, f3, respectively, then H1, H2, H3 and f1, f2, f3 satisfy the following relationships, respectively: h1 & gtH 2 & gtH 3, f1 & lt f2 & lt f 3.

4. The sand mold casting waste residue sand separating machine according to claim 1, characterized in that: along the direction from top to bottom, the gear set comprises a driving gear, a first gear, a second gear and a third gear, the driving gear, the first gear, the second gear and the third gear are sequentially in a vertical arrangement state, wherein the driving gear is meshed with the first gear, the first gear is meshed with the second gear, and the second gear is meshed with the third gear; the center of the driving gear is fixedly connected with the rotating shaft, and the centers of the first gear, the second gear and the third gear are respectively provided with a central shaft which is fixedly connected; the upper end of the guide rod is sequentially provided with three groups of shaft sleeves from top to bottom, and the central shafts are respectively connected with the shaft sleeves in a one-to-one correspondence manner; the radii of the first gear, the second gear and the third gear are defined as R1, R2 and R3, respectively, R1, R2 and R3 satisfy the following relationships: r1 < R2 < R3.

5. The sand mold casting waste residue sand separating machine according to claims 1 and 3, characterized in that: a guide wheel is arranged in the sliding block group, and the guide wheel is matched with the guide rod to realize the movement of the sliding block group; along from last direction extremely down, the slider component is first slider, second slider and third slider, wherein first slider with first sieve case fixed connection, the second slider with second sieve case fixed connection, the third slider with third sieve case fixed connection.

6. The sand mold casting waste residue sand separating machine according to claims 1 to 5, characterized in that: the movable connecting rod comprises a first connecting rod, a second connecting rod and a third connecting rod, the first gear is connected with the third sieve box through the first connecting rod, the second gear is connected with the second sieve box through the second connecting rod, and the third gear is connected with the first sieve box through the third connecting rod.

7. The sand mold casting waste residue sand separating machine according to claim 6, characterized in that: the side end of the gear is provided with a positioning hole which is at a certain distance from the center of the gear, one end of the movable connecting rod is provided with a positioning shaft which is matched with the positioning hole, and the distances between the positioning holes of the first gear, the second gear and the third gear and the centers of the gears are respectively defined as L1, L2 and L3, so that L1, L2 and L3 meet the following relations: l1 < L2 < L3, when the amplitudes of the first, second and third sieve boxes in operation H1, H2, H3 satisfy the following mathematical relationship: h1=2L1, H2=2L2, H3=2L 3.

8. The sand mold casting waste residue sand separating machine according to claim 1, characterized in that: a fixed gear fixedly connected with the rotary drum is arranged at the side end of the rotary drum, and the rotating shaft penetrates through the center of the fixed gear; the central shaft of the second gear extends out of the shaft sleeve in the guide rod, a second auxiliary gear fixedly connected with the tail end of the central shaft is arranged at the tail end of the central shaft, the second auxiliary gear and the second gear rotate in the same direction, and the second auxiliary gear is meshed with the fixed gear.

9. The sand mold casting waste residue sand separating machine according to claim 1, characterized in that: the inner part of the housing is provided with a semi-closed inner shell which covers the rotary drum, the side surface of the inner shell is in a shape of inverted water drop with a round upper part and a sharp lower part, and an opening below the inner shell is aligned to the position right above the first screen box.

10. The sand mold casting waste residue sand separating machine according to claim 1, characterized in that: the bottom of the sand receiving vehicle is provided with four groups of universal wheels, and the side surface of the sand receiving vehicle is provided with a handle.