CN110076288A - A kind of mechanical regenerated sand grains strigil of old sand - Google Patents

Abstract

The invention discloses a sand friction device for mechanical regeneration of old sand, which comprises a friction box, a coarse grinding cavity and a fine grinding cavity are opened above the friction box, a sorting cavity is opened inside the bottom of the friction box, the sorting cavity and the fine grinding cavity are There is a discharge port between the coarse grinding chamber and the fine grinding chamber, and the motor is installed on the top plate of the friction box. The output shaft of the motor is connected to the rotating shaft. A fixed grinding rod, multiple stirring rods are installed on the rotating shaft at the coarse grinding chamber, an electric heating tube is sleeved on the inner wall of the friction box at the coarse grinding chamber, a grinding disc is sleeved on the rotating shaft at the fine grinding chamber, the outer wall of the grinding disc and the fine grinding chamber Friction teeth are installed between the inner walls. The electric heating tube heats the sand material so that the adhesive film is more likely to be rubbed off when the temperature rises. The rotating shaft drives the stirring rod to rotate to stir the sand material. The grinding disc and the inner wall of the fine grinding chamber slide down, and the rotating shaft drives the grinding disc to rotate, so that the friction teeth can strongly rub against the sand grains.

Description

A sand friction device for mechanical regeneration of old sand

technical field

The invention relates to the technical field of sand casting, in particular to a sand friction device for mechanically regenerating old sand.

Background technique

In sand casting, 1 to 7 tons of used old sand will be produced for every ton of casting produced. The old sand is usually recycled through mechanical regeneration. During regeneration, the invalid adhesive film on the surface of the sand grains needs to be removed to make it basically To restore the performance of the original sand, at present, the vibrator is used to make the sand materials collide, shear, and rub against each other in the shell to achieve the purpose of peeling off the residual adhesive film wrapped on the surface of the old sand grains. The friction between each other, the friction force is small, it takes a long time to rub to remove the residual adhesive film, the efficiency is low, and the friction force is small, it is not easy to rub the residual adhesive film, so we propose a sand friction for mechanical regeneration of old sand device is used to solve the above problems.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a sand friction device for mechanical regeneration of old sand, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a sand friction device for mechanical regeneration of old sand, including a friction box, a rough grinding cavity and a fine grinding cavity are opened inside the upper part of the friction box, and the rough grinding cavity and the fine grinding cavity are The grinding chambers are connected, and there is a sorting chamber under the friction box. There is a discharge port between the sorting chamber and the fine grinding chamber. A motor is fixedly installed on the top plate of the friction box. The output shaft of the motor runs through the top of the friction box and is fixedly connected to the rotating shaft. The friction boxes on both sides of the motor are respectively provided with old sand inlets and new sand inlets. The coarse grinding chamber A plurality of fixed grinding rods are fixedly installed on the inner wall of the coarse grinding chamber, and a plurality of stirring rods are fixedly installed on the rotating shaft at the rough grinding chamber, the stirring rods and the fixed grinding rods are distributed alternately, and the inner wall of the friction box at the rough grinding chamber is sleeved There is an electric heating tube, and the grinding disc is fixedly sleeved on the rotating shaft at the fine grinding chamber. Interlaced friction teeth are installed between the outer wall of the grinding disc and the inner wall of the fine grinding chamber. A sieve plate is installed in the separation chamber. There is a discharge port on the friction box at the bottom of the cavity.

Preferably, the fixed grinding rods and stirring rods are evenly distributed in multiple rows along the axial direction of the rotating shaft, and the number of each row is four, and the fixed grinding rods and stirring rods in two adjacent rows are all staggered, and the stirring rods pass through The rotation makes the sand materials fall in the coarse grinding chamber and is stirred by the fixed grinding rod and the stirring rod for many times, so that the sand materials collide and rub against each other for coarse grinding.

Preferably, the outer walls of the fixed grinding rod and the stirring rod are fixedly installed with mixing rods, the mixing rods on the fixed grinding rod and the stirring rod are interlaced with each other, and the outer wall of the mixing rod is fixedly provided with a plurality of friction block, so that the sand material and the mixing rod move relatively, and further rub the sand material. The abrasive block is a spherical corundum, which is roughly ground during the movement of the sand material.

Preferably, the top of the grinding disc is a conical structure, and the bottom is a circular platform structure with a large upper part and a smaller lower part, and the fine grinding chamber is a matching circular platform structure under the grinding disc, so that the sand material slides along the top of the grinding disc to the inner wall of the fine grinding cavity, and Sliding down through the circular platform structure, the friction teeth are installed at the circular platform structure of the grinding disc and the fine grinding chamber at intervals, and the distance between the friction teeth on the grinding disc and the fine grinding chamber gradually decreases from the top to the bottom of the grinding disc. The friction of the friction teeth with decreasing spacing becomes finer, and the adhesive film on the surface of the sand grain is completely rubbed off.

Preferably, four blanking holes are evenly distributed along the circumferential direction of the rotating shaft, and a dial is fixedly installed on the bottom of the grinding disc, and the finely ground sand is pushed into the blanking holes through the dial.

Preferably, the sieve plate is a vibrating sieve installed obliquely, which is convenient for sieving the sand, and the fine sand that has been rubbed falls into the sorting chamber and is collected through the discharge port. The bottom of the friction box is fixedly equipped with legs .

Preferably, the friction box at the sieve plate is fixedly sleeved with a return pipe, the outer wall of the friction box is fixedly installed with a feed pipe through a bracket, the return pipe is connected to the bottom outer wall of the feed pipe, and the feed pipe is connected to the outer wall of the feed pipe. A spiral track is installed inside the pipe, and the outer wall of the top of the feeding pipe is fixedly socketed with the discharge pipe. The discharge pipe is located directly above the old sand inlet, and the large-grained sand that has not been rubbed on the sieve plate flows into it through the return pipe. The feeding pipe is sent to the friction box through the spiral track again through the discharge pipe and the old sand inlet to rub again, and the circular friction makes it meet the standard.

Preferably, a driving motor for driving the spiral track is installed on the top of the feeding pipe, and a feeding pipe is fixedly sleeved on the bottom outer wall of the feeding pipe, so that the used sand can be put into the feeding pipe and sent to the old sand inlet.

Compared with the prior art, the beneficial effect of the present invention is: the sand material is heated by the electric heating tube, so that the adhesive film is more likely to be rubbed off when the temperature rises; The sand is evenly heated, and the relative collision between the sand, the collision between the sand and the stirring rod, the fixed grinding rod and the mixing rod also occur, so that the sand is coarsely ground; the grinding disc rotates, so that the sand moves along the grinding disc and fine During the sliding process of the inner wall of the cavity, the rotation of the grinding disc causes the relative movement of the friction teeth, thereby strongly rubbing the sand particles, and the friction efficiency is high, and the distance between the friction teeth on the grinding disc and the fine grinding chamber gradually decreases from the top to the bottom of the grinding disc. The friction of the friction teeth with decreasing spacing becomes finer, and the adhesive film on the surface of the sand grains is completely rubbed off; the finely ground sand material falls on the sieve plate for screening, and the molding sand that meets the grain size of the sand material after friction passes through the outlet. The feed port falls and collects, and the large-grained sand that has not been completely rubbed off by the adhesive flows back to the feed pipe through the return pipe, and is then transported to the old sand inlet and enters the friction box for circular friction to ensure that the final sand meets the requirements, and the returned sand The particle size is smaller than that of the old sand, and it can act as the abrasive of the old sand during the cyclic friction process, which is convenient for the sand materials to rub against each other to remove the surface adhesive film during rough grinding.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of enlarged structure at A place in Fig. 1 in the present invention;

Fig. 3 is a schematic diagram of the structure of the grinding disc of the present invention.

In the figure: 1 friction box, 2 coarse grinding chamber, 3 fine grinding chamber, 4 sorting chamber, 5 blanking hole, 6 rotating shaft, 7 motor, 8 fixed grinding rod, 9 stirring rod, 10 electric heating tube, 11 grinding disc, 12 Friction tooth, 13 dial, 14 sieve plate, 15 outlet, 16 legs, 17 delivery pipe, 18 spiral track, 19 return pipe, 20 feeding pipe, 21 discharge pipe, 22 old sand inlet, 23 new sand inlet , 24 mixing rods, 25 friction blocks.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution: a sand friction device for mechanical regeneration of old sand, including a friction box 1, and a coarse grinding chamber 2 and a fine grinding chamber 3 are opened inside the upper part of the friction box 1. Cavity 2 and fine grinding chamber 3 are connected, there is sorting chamber 4 inside the bottom of friction box 1, there is a discharge port 5 between sorting chamber 4 and fine grinding chamber 3, the top of coarse grinding chamber 2 and the bottom of fine grinding chamber 3 The rotating shaft 6 is rotated and socketed, and the motor 7 is fixedly installed on the top plate of the friction box 1. The output shaft of the motor 7 runs through the top of the friction box 1 and is fixedly connected to the rotating shaft 6. The friction box 1 on both sides of the motor 7 is respectively provided with old sand inlets 22 With the new sand inlet 23, the inner wall of the coarse grinding chamber 2 is fixedly installed with multiple fixed grinding rods 8, and the rotating shaft 6 at the coarse grinding chamber 2 is fixedly installed with a plurality of stirring rods 9, and the stirring rods 9 and the fixed grinding rods 8 are alternately distributed. The inner wall of the friction box 1 at the chamber 2 is sleeved with an electric heating tube 10, and the rotating shaft 6 at the fine grinding chamber 3 is fixedly sleeved with a grinding disc 11. Interlaced friction teeth 12 are installed between the outer wall of the grinding disc 11 and the inner wall of the fine grinding chamber 3. A sieve plate 14 is installed in the sorting chamber 4 , and a discharge port 15 is opened on the friction box 1 at the bottom of the sorting chamber 4 . After the sand material enters the friction box 1, the electric heating tube 10 heats the sand material, so that the adhesive film is more likely to be rubbed off when the temperature rises. The motor 7 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the stirring rod 9 to rotate, thereby stirring the sand material. , so that the sand material is evenly heated, and the stirring rod 9 and the fixed grinding rod 8 are staggered to stir the sand material, so that relative collisions between the sand materials occur, and the sand particles also collide with the stirring rod 9 and the fixed grinding rod 8, thereby coarsening the sand particles Grinding, the coarsely ground sand material flows along the grinding disc 11 to the inner wall of the fine grinding chamber 3 and slides down along the grinding disc 11 and the inner wall of the fine grinding chamber 3, and the rotating shaft 6 drives the grinding disc 11 to rotate, so that the sand grains slide down along the grinding disc 11 and the inner wall of the fine grinding chamber 3 During the process, the grinding disc 11 rotates to cause the friction teeth 12 to move relatively, thereby strongly rubbing the sand particles, bending and rubbing off the residual adhesive, and finally falling on the sieve plate 14 through the blanking hole 5 to be screened and collected through the discharge port 15 .

The fixed grinding rods 8 and the stirring rods 9 are evenly distributed in multiple rows along the axial direction of the rotating shaft 6, and the number of each row is four. The rotating shaft 6 rotates to make the sand material fall in the coarse grinding chamber 2 and is stirred by the fixed grinding rod 8 and the stirring rod 9 for many times, so that the sand material is evenly mixed and heated, and the sand material collides and rubs against each other for coarse grinding.

The mixing rods 24 are fixedly installed on the outer walls of the fixed grinding rod 8 and the stirring rod 9, and the mixing rods 24 on the fixed grinding rod 8 and the stirring rod 9 are interlaced with each other, and the outer walls of the mixing rods 24 are fixedly provided with a plurality of friction rods. The block 25 makes the sand material and the mixing rod 24 relatively move, and further rubs the sand material. The grinding block 25 is a spherical carborundum, and it is roughly ground during the movement of the sand material.

The top of the grinding disc 11 is a conical structure, and the lower part is a round platform structure with a large upper part and a smaller lower part. The fine grinding chamber 3 is a matching round platform structure under the grinding disc 11, so that the abrasive slides along the top of the grinding disc 11 to the inner wall of the fine grinding chamber 3, and passes through the round platform. The structure slides down, and the friction teeth 12 are staggeredly installed at the round table structure of the grinding disc 11 and the fine grinding chamber 3, and the distance between the friction teeth 12 on the grinding disc 11 and the fine grinding chamber 3 gradually decreases from the top to the bottom of the grinding disc 11, and the sand material slides down During the process, the friction of the friction teeth 12 with decreasing spacing becomes finer, and the adhesive film on the surface of the sand grains is completely rubbed off.

There are four blanking holes 5 evenly distributed along the circumferential direction of the rotating shaft 6 , and a dial 13 is fixedly installed on the bottom of the grinding disc 11 , and the sand material after fine grinding is pushed into the blanking holes 5 through the dial 13 .

The sieve plate 14 is a vibrating sieve installed on an incline, which is convenient for sieving the sand material. The fine sand grains that have been rubbed fall into the sorting chamber 4 and are collected through the discharge port 15. The bottom of the friction box 1 is fixedly equipped with a leg 16.

The friction box 1 at the sieve plate 14 is fixedly sleeved with a return pipe 19, and the outer wall of the friction box 1 is fixedly installed with a feed pipe 17 through a bracket. There is a spiral track 18, and the outer wall of the top of the feeding pipe 17 is fixedly socketed with the discharge pipe 21. The discharge pipe 21 is located directly above the old sand inlet 22, and the large-grained sand that has not been rubbed on the sieve plate 14 passes through the return pipe 19 It flows into the delivery pipe 17, and is sent to the friction box 1 through the spiral track 18 again through the discharge pipe 21 and the old sand inlet 22 to be rubbed again, and the circular friction makes it meet the standard.

The top of feed pipe 17 is equipped with a drive motor that drives the spiral track 18, and the bottom outer wall of feed pipe 17 is also fixedly sleeved with feed pipe 20, so that old sand is dropped into feed pipe 17 and delivered to old sand inlet 22.

Working principle: when the present invention is used, the old sand is poured into the feeding pipe 17 through the feeding port 20, and the spiral track 18 conveys the old sand to the discharge pipe 21 so that it enters the friction box 1 through the old sand inlet 22, and Initially, a small amount of new sand is added to the friction box 1 through the new sand inlet 23, so that the new sand acts as an abrasive to rub the old sand; after the sand enters the friction box 1, the electric heating tube 10 heats the sand, so that the adhesive film The heating is easier to be rubbed off, the motor 7 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the stirring rod 9 to rotate, so as to stir the sand material, so that the old sand and new sand are mixed evenly and the sand material is evenly heated, and the stirring rod 9 and the fixed grinding rod 8 interlaced with each other to stir the sand, so that relative collision occurs between the sand, and the sand also collides with the stirring rod 9 and the fixed grinding rod 8, so that the sand is coarsely ground, and the coarsely ground sand flows along the grinding disc 11 to the fine grinding The inner wall of the cavity 3 slides down along the inner wall of the grinding disc 11 and the fine grinding chamber 3, and the rotating shaft 6 moves the grinding disc 11 to rotate, so that during the process of sliding the sand grains along the grinding disc 11 and the inner wall of the fine grinding chamber 3, the rotation of the grinding disc 11 makes the friction teeth 12 move relatively, thereby The sand is strongly rubbed, and the distance between the friction teeth 12 on the grinding disc 11 and the fine grinding chamber 3 gradually decreases from the top to the bottom of the grinding disc 11. During the sliding process of the sand, the friction teeth 12 with decreasing spacing become finer, and the surface of the sand grains The adhesive film is completely rubbed off, and then the sand material falls to the bottom of the fine grinding chamber 3, and the dial 13 at the bottom of the grinding disc 11 sweeps the sand material into the blanking hole 5, and the sand material after fine grinding falls on the sieve plate 14 for further grinding. After screening, the molding sand that meets the particle size of the sand material after friction falls and collects through the discharge port 15, and the large-grained molding sand that has not been completely rubbed off by the adhesive flows back to the feeding pipe 17 through the return pipe 19, so as to be transported to the old sand inlet again. 22 enters the friction box 1 for cyclic friction to ensure that the final sand meets the requirements, and the particle size of the reflowed sand is smaller than that of the old sand, which can be used as an abrasive for the old sand during the cyclic friction process for rough grinding.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. a kind of mechanical regenerated sand grains strigil of old sand, including friction case (1), it is characterised in that: above the friction case (1) Inside is provided with corase grinding chamber (2) and fine grinding chamber (3), and the corase grinding chamber (2) is connected with fine grinding chamber (3), below the friction case (1) Inside is provided with sorting chamber (4), is provided with discharge port (5) between the sorting chamber (4) and fine grinding chamber (3), at the top of the corase grinding chamber (2) with Turning set switches through axis (6) between fine grinding chamber (3) bottom, motor (7) is fixedly mounted on friction case (1) top plate, the motor (7) Output shaft through friction case (1) at the top of and be fixedly connected shaft (6), on the friction case (1) of the two sides of the motor (7) respectively Equipped with old sand entrance (22) and fresh sand entrance (23), multiple fixed frottons (8), institute is fixedly mounted in the inner wall of corase grinding chamber (2) It states and is fixedly mounted multiple stirring rod (9) in the shaft (6) at corase grinding chamber (2), the stirring rod (9) and fixed frotton (8) are staggeredly It is distributed, is socketed with electrothermal tube (10) in friction case (1) inner wall at corase grinding chamber (2), the shaft at fine grinding chamber (3) (6) it is fixedly attached on mill (11), staggered friction teeth is installed between the outer wall and fine grinding chamber (3) inner wall of the mill (11) (12), it is equipped with sieve plate (14) in the sorting chamber (4), is provided with discharge port on the friction case (1) of sorting chamber (4) bottom (15).

2. the mechanical regenerated sand grains strigil of a kind of old sand according to claim 1, it is characterised in that: the fixed frotton (8) and stirring rod (9) is uniformly distributed along the axis direction of shaft (6) multiple rows of, and the quantity of every row is four, adjacent two rows of Fixed frotton (8) and stirring rod (9) are interspersed, and stirring rod (9) is rotated by shaft (6) so that sand material is in corase grinding chamber (2) It is fixed frotton (8) when interior whereabouts and stirring rod (9) repeatedly stirs, so that the mutual collision friction of sand material is roughly ground.

3. the mechanical regenerated sand grains strigil of a kind of old sand according to claim 1, it is characterised in that: the fixed frotton (8) and on stirring rod (9) outer wall it is fixedly mounted mixing strut (24), the mixing on the fixed frotton (8) and stirring rod (9) Strut (24) is interlaced, and mixing strut (24) outer wall is fixed with multiple friction blocks (25), so that sand material and mixing strut (24) it relatively moves, further rub sand material, and the abrasive block (25) is spherical diamond dust, right in sand material moving process It is roughly ground.

4. the mechanical regenerated sand grains strigil of a kind of old sand according to claim 1, it is characterised in that: the mill (11) Top be conical structure, lower section be up big and down small frustum cone structure, it is described fine grinding chamber (3) be matching mill (11) below circle Platform structure, so that sand material is slided at the top of mill (11) at fine grinding chamber (3) inner wall, and is slid downwards by frustum cone structure, it is described Friction teeth (12) interleaved is mounted at mill (11) and the frustum cone structure of fine grinding chamber (3), and mill (11) and fine grinding chamber (3) On friction teeth (12) spacing gradually successively decrease from mill (11) top-to-bottom, the friction successively decreased by spacing during sand material glides Tooth (12) friction becomes finer, and the adhesive film of sand grain surface is rubbed completely.

5. the mechanical regenerated sand grains strigil of a kind of old sand according to claim 1, it is characterised in that: the material-dropping hole (5) there are four the circumferencial direction along shaft (6) is uniformly distributed, the bottom of the mill (11) is fixedly installed with driver plate (13), will Sand material after fine grinding is pushed in material-dropping hole (5) by driver plate (13).

6. the mechanical regenerated sand grains strigil of a kind of old sand according to claim 1, it is characterised in that: the sieve plate (14) For the vibrating screen of inclination installation, convenient for by sand material screen point, rubbed tiny sand grains is fallen to sorting chamber (4), and passes through and Material mouth (15) is collected, and friction case (1) bottom is fixedly installed with supporting leg (16).

7. the mechanical regenerated sand grains strigil of a kind of old sand according to claim 1, it is characterised in that: the sieve plate (14) It is fixedly attached feed back pipe (19) on the friction case (1) at place, is fixed by the bracket installation conveying pipeline on friction case (1) outer wall (17), the bottom outer wall of feed back pipe (19) connection conveying pipeline (17), the conveying pipeline (17) is interior to be equipped with helical orbit (18), the top exterior walls of the conveying pipeline (17) are fixedly attached discharge nozzle (21), and the discharge nozzle (21) is located at old sand entrance (22) right above, the bulky grain sand material not rubbed on sieve plate (14) is flowed into conveying pipeline (17) by feed back pipe (19), is passed through Helical orbit (18) is sent into friction case (1) again by discharge nozzle (21) and old sand entrance (22) and rubs again, and circulation friction makes It meets standard.

8. the mechanical regenerated sand grains strigil of a kind of old sand according to claim 7, it is characterised in that: the conveying pipeline (17) driving motor of driving helical orbit (18) is installed, the bottom outer wall of the conveying pipeline (17) is also fixedly attached at the top of There are commissioning pipe (20), convenient for old sand entrance (22) will be sent in old sand investment delivery pipe (17).