Casting device for lost foam casting

Abstract

The invention relates to the technical field of casting devices, in particular to a casting device for lost foam casting. Most of common casting devices for lost foam casting are used for obliquely pouring molten iron, so that the molten iron is easy to splash all around in the casting process, the risk of accidentally injuring workers exists, and if impurities in the molten iron enter a lost foam along with the molten iron, the interior of a finished product is caked, and the product quality is influenced. In order to solve the problems that the flow of poured molten iron is difficult to control and the casting is influenced due to the fact that the flow of the poured molten iron is limited by the aperture of a valve, the invention provides the following technical scheme: the casting tank comprises a casting tank, and a filtering assembly convenient for filtering the molten iron is arranged in the casting tank. The purposes of stirring, defoaming and heating the molten iron are achieved while the molten iron is filtered, the casting flow can be adjusted according to the volume of the evanescent mode, and subsequent improvement of the quality of a cast finished product is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of casting devices, in particular to a casting device for lost foam casting. Background Art

[0002] The basic principle of lost foam casting is to use a mold material (usually a polymer or wax) that can be melted or evaporated. During the casting process, the mold will be melted or evaporated at high temperature, leaving the shape of the casting. A layer of refractory material (such as a mixture of sand and binder) is coated on the surface of the lost foam to form a mold. This layer of refractory material provides support during the subsequent casting process. Then, by pouring the molten metal into the remaining mold and waiting for the metal to cool and solidify, the lost foam melts or evaporates at high temperature, so that the molten iron forms a mold and the casting is completed.

[0003] However, most common casting devices for lost foam casting pour molten iron at an angle, which makes it easy for the molten iron to splash around during the casting process, posing a risk of accidental injury to workers. In addition, if impurities in the molten iron follow the molten iron into the lost foam, agglomerates will form inside the finished product, resulting in gaps between the agglomerates of the finished product and other structures, reducing product quality. At the same time, due to the limitation of the valve aperture, it is difficult to control the flow rate of pouring molten iron, affecting casting. In view of this, we propose a casting device for lost foam casting. Summary of the invention

[0004] The purpose of the present invention is to provide a casting device for lost foam casting in view of the problems existing in the background technology.

[0005] The technical solution of the present invention is as follows: a casting device for lost foam casting, comprising a casting pot, wherein a filter assembly for filtering molten iron is installed in the casting pot, wherein the filter assembly comprises a conical filter screen, wherein a first sealed bearing is arranged in an inner opening of the conical filter screen, wherein a first rotating shaft is arranged in an inner ring of the first sealed bearing, wherein a cleaning scraper is welded on an outer surface wall of the first rotating shaft, and wherein a cleaning scraper is also welded on an outer surface wall of the first rotating shaft;

[0006] The casting tank is provided with a stirring assembly for stirring and heating inside and outside, the stirring assembly includes a support plate, a forward and reverse motor is installed on the top wall of the support plate, a second rotating shaft is connected to the output end of the forward and reverse motor, a main gear is sleeved on the outer ring surface of the second rotating shaft, a transmission belt is sleeved on the main gear, a slave gear is arranged in the transmission belt, a third rotating shaft is arranged in the slave gear, a top end of the third rotating shaft is connected to a stirring drum, and a second sealed bearing is arranged in the top opening of the stirring drum;

[0007] A plurality of protrusions are arranged in the mixing drum, and a linkage assembly is arranged between the plurality of protrusions, and the linkage assembly includes a second arc-shaped tooth, a fourth rotating shaft is arranged in the opening of the second arc-shaped tooth, and a torsion spring is connected to the top wall and the bottom wall of the second arc-shaped tooth;

[0008] An adjustment component for adjusting the discharge flow rate of molten iron is installed at the bottom of the casting pot, and the adjustment component includes a turntable, an auxiliary cylinder is arranged in the opening of the turntable, a cylinder and a fourth sealing bearing are sleeved on the outer ring surface of the auxiliary cylinder, third sealing bearings are symmetrically installed on the outer walls on both sides of the auxiliary cylinder, and an auxiliary sealing ring is installed on the inner wall of the bottom of the casting pot.

[0009] Preferably, a drain pipe is connected to the opening of the outer wall of the casting pot, and the drain pipe is located in the space above the conical filter net. The plurality of cleaning scrapers are also arranged in the space above the conical filter net.

[0010] Preferably, the plurality of first arc-shaped teeth are arranged in a ring array on the outer ring surface of the first rotating shaft, and the plurality of first arc-shaped teeth are also disposed in the mixing drum.

[0011] Preferably, the plurality of second arc-shaped teeth are also distributed in a circular array, and the second arc-shaped teeth are arranged alternately with the first arc-shaped teeth.

[0012] Preferably, the support plate is mounted on the outer wall of the casting tank, and the top end of the second rotating shaft passes through the opening on the support plate and is connected to the output end of the forward and reverse motor.

[0013] Preferably, the two torsion springs are symmetrically arranged, and the opposite ends of the two torsion springs are respectively connected to the bottom inner wall and the top inner wall of the mixing drum, and the two torsion springs are also sleeved on the fourth rotating shaft.

[0014] Preferably, rotation grooves are provided on the bottom inner wall and the top wall of the mixing drum, auxiliary bearings are arranged in the plurality of rotation grooves, and the plurality of bearings are respectively sleeved on the outer ring surface of the fourth rotating shaft.

[0015] Preferably, the turntable is provided with a discharge port, a plurality of the discharge ports are distributed in a ring array, and the diameters of the plurality of discharge ports are arranged in descending order.

[0016] Preferably, a positioning hole is provided on the third rotating shaft, and through holes are symmetrically provided on the auxiliary cylinder, and the output ends of the two third sealed bearings respectively penetrate the through holes and are inserted into the positioning holes.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] 1. The present invention is conducive to filtering the molten iron when it enters the casting pot through the arrangement of the conical filter screen. At the same time, the cleaning scraper can be driven by the first rotating shaft to rotate and cooperate with the pipe to clean the agglomerates at the filtering position, which is convenient for the staff to recycle the agglomerates. In addition, under the action of filtering, it is conducive to preventing the agglomerates from being cast together with the molten iron, so that a gap is generated between the internal structure of the cast finished product and the agglomerates, thereby reducing the cost and quality;

[0019] 2. The present invention drives the forward and reverse motors so that the second rotating shaft can drive the third rotating shaft to rotate under the cooperative transmission of the main gear, the transmission belt and the slave gear, thereby driving the mixing drum to rotate, so that the electric heating stirring blades installed on the outer surface of the mixing drum rotate, and the molten iron in the casting tank is stirred, which is beneficial to reduce the influence of natural cooling of the internal molten iron when not in use under the action of stirring and heating, and at the same time, it is beneficial to eliminate bubbles in the molten iron under the action of stirring;

[0020] 3. The present invention is advantageous in that the ring array arrangement of the linkage assembly is conducive to driving the second arc-shaped teeth to rotate clockwise during the clockwise rotation of the mixing drum, so that the second arc-shaped teeth can be contracted under the auxiliary action of the fourth rotating shaft during the clockwise rotation, thereby avoiding being blocked, so as to prevent the first rotating shaft from being driven to rotate during the stirring of molten iron, and to prevent the cleaning work and the stirring work from being carried out simultaneously, which is beneficial in reducing the burden during the stirring process. On the contrary, during the counterclockwise rotation of the second arc-shaped teeth, the second arc-shaped teeth can be clamped with the phase under the obstruction of the convex structure in the mixing drum, thereby achieving the purpose of driving it to rotate and providing power for the cleaning work;

[0021] 4. The present invention drives the cylinder so that the output end of the cylinder can be inserted into the positioning hole opened on the outer surface wall of the third rotating shaft, and the rotation of the third rotating shaft drives the turntable to rotate in the casting pot, so that the turntable rotates under the guidance of the auxiliary sealing ring to adjust the amount of molten iron discharged, which is beneficial to adjust the volume of the lost foam and reduce the waste of resources in the casting process or the internal defects of the product after cooling caused by continuous low-flow and high-flow casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a casting device for lost foam casting;

[0023] Figure 2 yes Figure 1 A schematic diagram of a front view cross-section structure;

[0024] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure of the filter assembly;

[0025] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the stirring assembly;

[0026] Figure 5 yes Figure 2 A schematic diagram of the structure of the middle linkage assembly from a top view;

[0027] Figure 6 yes Figure 1 Schematic diagram of the three-dimensional structure of the adjustment component.

[0028] Figure numerals: 1. casting tank; 2. discharge pipe; 3. discharge pipe; 4. filter assembly; 41. conical filter screen; 42. first sealed bearing; 43. first rotating shaft; 44. cleaning scraper; 45.; 5. stirring assembly; 51. support plate; 52. forward and reverse motor; 53. second rotating shaft; 54. main gear; 55. transmission belt; 56. slave gear; 57. third rotating shaft; 58. stirring drum; 59. second sealed bearing; 6. linkage assembly; 61. second arc teeth; 62. fourth rotating shaft; 63. torsion spring; 7. adjustment assembly; 71. turntable; 72. auxiliary cylinder; 78. cylinder; 74. third sealed bearing; 75. fourth sealed bearing; 8. auxiliary sealing ring. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Embodiment 1

[0031] like Figure 1-3As shown, a casting device for lost foam casting proposed by the present invention comprises a casting tank 1, a drain pipe 2 is fixedly installed at an opening of the outer wall of the casting tank 1, and a valve port of the drain pipe 2 is connected to the inside of the casting tank 1, so as to conveniently discharge impurities in the casting tank 1; a filter assembly 4 is installed in the casting tank 1 for filtering molten iron, and the filter assembly 4 comprises a conical filter screen 41, a first sealing bearing 42, a first rotating shaft 43, a cleaning scraper 44 and a first arc-shaped tooth 45; the conical filter screen 41 is fixedly installed on the inner surface wall of the casting tank 1, and divides the space in the casting tank 1 into two parts, so that when the molten iron enters the casting tank 1, it needs to be filtered through the conical filter screen 41, thereby preventing the agglomerates in the molten iron from entering the space below the conical filter screen 41, so as to prevent the agglomerates from entering the lost foam with the molten iron in the subsequent discharge process, so that a gap is generated between the internal agglomerates of the finished product and the remaining structures, resulting in a decrease in the quality of the finished product; the first sealing bearing 42 is arranged In the opening in the middle of the conical filter 41, it plays a sealing role and is also sleeved on the outer ring surface of the first rotating shaft 43, which is conducive to assisting the first rotating shaft 43 to rotate on the conical filter 41. The upper and lower structures of the first rotating shaft 43 are respectively in the upper space and the lower space of the conical filter 41. A plurality of cleaning scrapers 44 are welded in a ring array state on the outer ring surface of the upper structure of the first rotating shaft 43, and are located on the top surface of the conical filter 41, which is conducive to the rotation of the cleaning scraper 44 under the drive of the first rotating shaft 43 to clean the conical filter 41, which is conducive to the subsequent filtering work, and cooperates with the discharge pipe 2 in the open state to facilitate the discharge of lumps from the casting tank 1 to prevent accumulation on the conical filter 41 and hindering filtration; a plurality of first arc-shaped teeth 45 are welded in a ring array state on the outer ring surface of the lower part of the first rotating shaft 43, which is convenient for the subsequent rotation of the first rotating shaft 43.

[0032] Embodiment 2

[0033] like Figure 1-3As shown, a casting device for lost foam casting proposed by the present invention, compared with the first embodiment, this embodiment also includes a casting tank 1 and a filtering component 4, the casting tank 1 is provided with a stirring component 5 for stirring and heating inside and outside, the stirring component 5 includes a support plate 51, a forward and reverse motor 52, a second rotating shaft 53, a main gear 54, a transmission belt 55, a slave gear 56, a third rotating shaft 57, a stirring drum 58 and a second sealed bearing 59, the support plate 51 is fixedly mounted on the outer wall of the casting tank 1, the forward and reverse motor 52 is fixedly mounted on the top wall of the support plate 51, the forward and reverse motor 52 is supported by the support plate 51, the top end of the second rotating shaft 53 passes through the opening on the support plate 51, and is connected to the output end of the forward and reverse motor 52, so as to facilitate the forward and reverse motor 52 to drive the second rotating shaft 53 to rotate; the main gear 54 and the slave gear 56 are arranged in the transmission belt 55, the main gear 54 is fixedly sleeved on the outer ring surface of the second rotating shaft 53, and the slave gear 56 is fixedly sleeved on the outer ring surface of the second rotating shaft 53, and the slave gear 56 is fixedly sleeved on the outer ring surface of the second rotating shaft 53. The fixed sleeve is connected to the outer ring surface of the third rotating shaft 57, so that the main gear 54 in the rotating state can drive the slave gear 56 to rotate under the transmission action of the transmission belt 55, and drive the mixing drum 58 arranged in the casting tank 1 to rotate through the third rotating shaft 57. The heating stirring blades symmetrically installed on the outer surface wall of the mixing drum 58 are used to stir the molten iron in the casting tank 1, which is conducive to eliminating bubbles in the molten iron. At the same time, under the action of heating, it can prevent the molten iron in the casting tank 1 from cooling down naturally when not in use, affecting subsequent use; the second sealed bearing 59 is arranged in the opening of the top wall of the mixing drum 58, and the bottom end of the first rotating shaft 43 passes through the top opening of the mixing drum 58 and is inserted therein, so that a plurality of first arc-shaped teeth 45 are arranged inside the mixing drum 58, and at the same time, the inner ring surface of the second sealed bearing 59 is also connected to part of the outer ring surface of the first rotating shaft 43, which plays an auxiliary and sealing role in the connection between the first rotating shaft 43 and the mixing drum 58.

[0034] Embodiment 3

[0035] like Figure 1-5As shown, a casting device for lost foam casting proposed by the present invention, compared with the first or second embodiment, this embodiment also includes a casting pot 1, a filtering component 4 and a stirring component 5, a plurality of protrusions are arranged in the stirring drum 58, and a linkage component 6 is arranged between the plurality of protrusions, and the linkage component 6 includes a second arc-shaped tooth 61, a fourth rotating shaft 62 and a torsion spring 63, and the plurality of second arc-shaped teeth 61 are arranged in an annular array, and are staggered with the first arc-shaped teeth 45 which are also arranged in an annular array; the protrusions on the inner surface wall of the stirring drum 58 are distributed in an annular state, and are located on one side of the plurality of second arc-shaped teeth 61, and the second arc-shaped teeth 61 are fixedly installed in the opening of the second arc-shaped teeth 61, and the two ends of the fourth rotating shaft 62 are respectively inserted into the rotating grooves symmetrically opened on the top inner wall and the bottom inner wall of the stirring drum 58, and the outer ring surface thereof is also connected to the inner ring surface of the auxiliary bearing in the rotating groove, which is conducive to the fourth rotating shaft 62 and the second arc-shaped teeth being assisted by the auxiliary bearing. The tooth 61 rotates; the opposite ends of the two torsion springs 63 are fixedly connected to the top wall and the bottom wall of the second arc-shaped tooth 61, respectively, and the reverse ends of the two torsion springs 63 are fixedly connected to the top inner wall and the bottom inner wall of the mixing drum 58, respectively, which is conducive to driving the second arc-shaped tooth 61 to reset when the pressure is released. Due to the staggered arrangement of the second arc-shaped tooth 61 and the first arc-shaped tooth 45, and at the same time under the blocking effect of the protrusion, the mixing drum 58 can be assisted by the torsion spring 63 under the clockwise rotation, so that the second arc-shaped tooth 61 can be contracted when passing through the first arc-shaped tooth 45, and released after passing through, which is conducive to preventing the first rotating shaft 43 from rotating during the stirring of the molten iron, resulting in an increase in the stirring pressure. When the mixing drum 58 rotates counterclockwise, the second arc-shaped tooth 61 can be clamped with the first arc-shaped tooth 45, thereby driving the first rotating shaft 43 to rotate, thereby cleaning the top of the conical filter screen 41, and facilitating the subsequent filtering work.

[0036] Embodiment 4

[0037] like Figure 1-6As shown, a casting device for lost foam casting proposed by the present invention, compared with embodiment 1, embodiment 2 or embodiment 3, this embodiment also includes a casting tank 1, a filtering component 4, a stirring component 5 and a linkage component 6, an adjustment component 7 for adjusting the discharge flow rate of molten iron is installed at the bottom of the casting tank 1, the adjustment component 7 includes a turntable 71, an auxiliary cylinder 72, a cylinder 78, a third sealing bearing 74 and a fourth sealing bearing 75, an auxiliary sealing ring 8 is installed on the inner wall of the bottom of the casting tank 1, the turntable 71 is arranged in the auxiliary sealing ring 8, and rotates with the assistance of the auxiliary sealing ring 8; the discharge pipe 3 is fixedly installed in the bottom opening of the casting tank 1, and the position corresponds to the discharge port position of the turntable 71 with diameter sizes distributed in sequence, the diameter of the discharge pipe 3 corresponds to the discharge port position of the maximum diameter in the annular array state, so that the turntable 71 can adjust the discharge flow rate of molten iron during rotation to prevent the molten iron from being discharged continuously. If the size of the auxiliary cylinder 72 is too large or too small, defects may occur inside the product after cooling; the auxiliary cylinder 72 is fixedly installed in the middle opening of the turntable 71, which is conducive to driving the turntable 71 to rotate; the fourth sealing bearing 75 is sleeved on the outer ring surface of the auxiliary cylinder 72, and the third sealing bearing 74 is arranged on the inner ring surface of the auxiliary cylinder 72; the third sealing bearing 74 is used to seal the inside of the auxiliary cylinder 72; a rotating hole is provided on the bottom wall of the casting tank 1; the fourth sealing bearing 75 is also arranged in the rotating hole to seal the rotating hole and assist the rotation; the two cylinders 78 are symmetrically installed on the outer surface wall of the auxiliary cylinder 72; the output ends of the two cylinders 78 pass through the through holes symmetrically provided on the auxiliary cylinder 72 and are inserted into the positioning holes provided on the third rotating shaft 57, which is conducive to using the third rotating shaft 57 to drive the adjustment component 7 to rotate to complete the aperture adjustment during the plug-in process; otherwise, the connection can be released to prevent an increase in the workload when stirring the molten iron.

[0038] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A casting device for lost foam casting, comprising a casting tank (1), characterized in that: The casting ladle (1) is provided with a filter assembly (4) for filtering molten iron, the filter assembly (4) comprising a conical filter screen (41), a first sealing bearing (42) being arranged in the inner opening of the conical filter screen (41), a first rotating shaft (43) being arranged in the inner ring of the first sealing bearing (42), a cleaning scraper (44) being welded on the outer surface wall of the first rotating shaft (43), and a first arc-shaped tooth (45) being welded on the outer surface wall of the first rotating shaft (43); A stirring assembly (5) for stirring and heating is installed inside and outside the casting tank (1), the stirring assembly (5) comprising a support plate (51), a forward and reverse motor (52) is installed on the top wall of the support plate (51), the output end of the forward and reverse motor (52) is connected to a second rotating shaft (53), a main gear (54) is sleeved on the outer ring surface of the second rotating shaft (53), a transmission belt (55) is sleeved on the main gear (54), a slave gear (56) is arranged in the transmission belt (55), a third rotating shaft (57) is arranged in the slave gear (56), the top end of the third rotating shaft (57) is connected to a stirring drum (58), and a second sealed bearing (59) is arranged in the top opening of the stirring drum (58); A plurality of protrusions are arranged in the mixing drum (58), and a linkage assembly (6) is arranged between the plurality of protrusions. The linkage assembly (6) comprises a second arc-shaped tooth (61), a fourth rotating shaft (62) is arranged in the opening of the second arc-shaped tooth (61), and a torsion spring (63) is connected to the top wall and the bottom wall of the second arc-shaped tooth (61); An adjustment component (7) for adjusting the discharge flow rate of molten iron is installed at the bottom of the casting tank (1), and the adjustment component (7) includes a turntable (71). An auxiliary cylinder (72) is arranged in the opening of the turntable (71), and a cylinder (78) and a fourth sealing bearing (75) are sleeved on the outer ring surface of the auxiliary cylinder (72). Third sealing bearings (74) are symmetrically installed on the outer walls on both sides of the auxiliary cylinder (72), and an auxiliary sealing ring (8) is installed on the inner wall of the bottom of the casting tank (1).

2. A casting device for lost foam casting according to claim 1, characterized in that: The outer wall opening of the casting tank (1) is connected to a drain pipe (2), the drain pipe (2) is located in the space above the conical filter screen (41), and a plurality of cleaning scrapers (44) are also arranged in the space above the conical filter screen (41).

3. A casting device for lost foam casting according to claim 1, characterized in that: A plurality of the teeth (45) are arranged in a ring array on the outer ring surface of the first rotating shaft (43), and a plurality of the first arc-shaped teeth (45) are also arranged in the mixing drum (58).

4. A casting device for lost foam casting according to claim 1, characterized in that: The plurality of second arc-shaped teeth (61) are also distributed in a ring array, and the second arc-shaped teeth (61) and the first arc-shaped teeth (45) are arranged in an alternating manner.

5. A casting device for lost foam casting according to claim 1, characterized in that: The support plate (51) is mounted on the outer wall of the casting tank (1), and the top end of the second rotating shaft (53) passes through an opening on the support plate (51) and is connected to the output end of the forward and reverse motor (52).

6. A casting device for lost foam casting according to claim 1, characterized in that: The two torsion springs (63) are symmetrically arranged, and the opposite ends of the two torsion springs (63) are respectively connected to the bottom inner wall and the top inner wall of the mixing drum (58), and the two torsion springs (63) are also sleeved on the fourth rotating shaft (62).

7. A casting device for lost foam casting according to claim 1, characterized in that: The bottom inner wall and the top wall of the mixing drum (58) are both provided with rotation grooves, and auxiliary bearings are arranged in the plurality of rotation grooves. The plurality of bearings are respectively sleeved on the outer ring surface of the fourth rotating shaft (62).

8. A casting device for lost foam casting according to claim 1, characterized in that: The rotating disk (71) is provided with a discharge port, and a plurality of the discharge ports are distributed in a ring array, and the diameters of the plurality of discharge ports are arranged in descending order.

9. A casting device for lost foam casting according to claim 1, characterized in that: The third rotating shaft (57) is provided with a positioning hole, the auxiliary cylinder (72) is symmetrically provided with through holes, and the output ends of the two third sealing bearings (74) respectively penetrate the through holes and are inserted into the positioning holes.

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