Circular casting equipment and the feeding system used

Abstract

In view of the deficiencies of the prior art that small particles and metal dust are generated during the metal casting process, resulting in waste of raw materials, the present invention provides a recycling casting device and a cloth feeding system used therefor. The casting device and the cloth feeding system of the structure of the present invention include a hopper, a storage bin, a cloth sieve, and a vibration device. The hopper is located above the storage bin, and the cloth sieve is located below the storage bin. The discharge port 1 of the hopper is communicated with the feeding port 2 of the storage bin. By using the cloth feeding system of the present invention, small particles and metal dust can be collected through the hopper, and then dispersed through the storage bin so that they evenly fall into the cloth sieve, and then evenly laid out by the cloth sieve. Therefore, the effect of uniform cloth feeding can be achieved, and a layer of recycled small particles and metal dust can be evenly covered on the surface of the casting mold. On the one hand, raw materials can be saved, and more importantly, it can play a protective role for the casting mold and improve the heat shock resistance of the casting mold.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal casting, and particularly relates to a circulating metal casting device and a feeding system used therefor. Background Art

[0002] In metal casting equipment, when metal ingots are formed into particles of specified requirements at the tail wheel, fine particles and metal dust are generated. These fine particles and metal dust are often treated as waste, resulting in waste of raw materials. Therefore, the recycling of metal dust and fine particles has become a trend. For this reason, the applicant has developed a feeding system that is conducive to the recycling of fine particles and metal dust, and the collected fine particles and metal dust are used as raw materials in the metal casting process for feeding. In addition, in the prior art, since the casting mold needs to carry molten metal, the temperature of the molten metal is high, generally reaching about 1000 °C, and the thermal shock on the casting mold is very high, so the casting mold is easily damaged. Summary of the Invention

[0003] The purpose of the present invention is to provide a circulating casting device and a feeding system used therefor in view of the deficiency in the prior art that fine particles and metal dust are generated during the metal casting process, resulting in waste of raw materials.

[0004] Another purpose of the present invention is to provide a circulating casting device in view of the deficiency in the prior art that the casting mold is easily damaged by high-temperature impact.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A feeding system for a casting device includes a hopper, a storage bin, a feeding screen, and a vibration device. The hopper is located above the storage bin, and the feeding screen is located below the storage bin. The discharge port 1 of the hopper is communicated with the inlet port 2 of the storage bin. The bottom of the storage bin is a wedge-shaped body composed of two bottom side walls. The discharge port 2 of the storage bin is strip-shaped and located at the bottom of the wedge-shaped body. One bottom side wall of the storage bin is opposite to the discharge port 1, and the discharge port 1 is not strip-shaped, so that the material falling from the discharge port 1 onto the bottom side wall is in a dot shape or a cone shape. The discharge port 2 is narrow strip-shaped. The sizes of the discharge port 1 and the discharge port 2 of the hopper need to meet the following conditions: when the material falls onto the bottom side wall and then falls along the bottom side wall to the discharge port 2, it can be dispersed along the length direction of the discharge port 2 and fall from the discharge port 2.

[0007] One bottom side wall of the wedge-shaped body is longer than the other bottom side wall. The bottom end of the long bottom side wall crosses the center line of the discharge port 1, and the discharge port 1 is located above the long bottom side wall, and its projection is located on the long bottom side wall.

[0008] The fabric sieve is inclined, sloping downward from top to bottom from its rear seal towards the opening direction of the fabric sieve. A vibration device is provided at the rear seal end on the fabric sieve, and the fabric sieve is suspended and fixed by a suspension device.

[0009] Each of the suspension devices includes a suspension rod and a vibration damping component. The upper end of the suspension rod is provided with an adjustment thread. The upper end of the suspension rod passes through a through hole provided on the first connecting plate. Adjusting nuts one are respectively threadedly connected to the adjustment threads above and below the first connecting plate. The length of the suspension rod below the first connecting plate is adjusted by the adjusting nuts one. The first connecting plate is fixedly connected to the storage bin or the frame. The lower end of the suspension rod is provided with a hanging structure one. The vibration damping component includes a vibration damping spring and a tension adjustment rod. The upper end of the tension adjustment rod is provided with a hanging structure two for connecting with the hanging structure one. The lower end of the tension adjustment rod is provided with an adjustment thread. The vibration damping spring is sleeved outside the tension adjustment rod. The second connecting plate is fixedly connected to the fabric sieve. The lower end of the tension adjustment rod passes through a through hole provided on the second connecting plate, and an adjusting nut two is threadedly connected to the thread below the second connecting plate. The upper end of the vibration damping spring is fixedly connected to the second connecting plate.

[0010] A spring seat is provided at the lower end of the vibration damping spring, and the lower end of the vibration damping spring is fixedly connected to the spring seat. The spring seat is located above the adjusting nut two, and the length of the spring is adjusted by adjusting the position of the adjusting nut two so as to adjust the elastic force of the spring.

[0011] The hopper includes a hopper bin, a lifting rod and a bracket. The upper end of the hopper bin is provided with a first feed inlet, and the lower end of the hopper bin is provided with a first discharge outlet. The first discharge outlet is in the shape of a tapered hole, and its large inner diameter is located below. The lower end of the lifting rod is provided with a frustum, and the taper of the frustum is the same as that of the tapered hole. The large diameter of the frustum is larger than the small diameter of the tapered hole, and the frustum is movably connected to the tapered hole in a matching manner. The upper end of the tapered rod is provided with a flange. The bracket is arranged in the feed inlet, and a through hole is provided at the center of the bracket. The flange is located above the bracket, and its projection covers the through hole. When the suspension rod drops and the flange covers the through hole, the frustum is disengaged from the tapered hole. When the suspension rod is lifted, the frustum is connected to the tapered hole in a matching manner to block the tapered hole. The hopper bin of the hopper includes a cylinder located above and a cone cylinder located below, and the cylinder and the cone cylinder are fixedly connected into one body.

[0012] The hanging structure one is a hook or a hanging ring, and the hanging structure two is a hook or a hanging ring. The hanging structure one and the hanging structure two are connected by hanging a hook on a hanging ring or both are connected by hanging a hook on a hook.

[0013] The vibration device is a vibration motor.

[0014] The present invention provides a cyclic casting device, including a head wheel, a tail wheel, a linear guide rail located between the head wheel and the tail wheel, and a curved rail connecting the linear guide rail. A running trolley for transporting casting molds is arranged on the linear guide rail and the curved rail. The casting mold is located on the top of the running trolley. A feeding system and a chute are arranged at one end of the linear guide rail on the same side as the head wheel. The chute is inclined above the linear guide rail, and its lower end faces the casting mold passing below it. The feeding system is located in the space between the chute and the head wheel. Using the feeding system described in any one of the above, the outlet of the feeding sieve faces the casting mold passing below it. The feeding system spreads the collected material onto the casting mold body. When the feeding system spreads the material onto the casting mold, the running trolley carries the casting mold forward so that the feeding sieve distributes the material in the casting mold to cover the top of the casting mold. When the casting mold passes below the chute, it receives molten metal liquid.

[0015] The beneficial effects of the present invention are as follows:

[0016] By using the feeding system of the present invention, fine particles and metal dust can be collected through the hopper, then dispersed through the storage bin to evenly fall into the feeding sieve, and then evenly laid out by the feeding sieve. Therefore, the effect of uniform feeding can be achieved, and a layer of recycled fine particles and metal dust can be evenly covered on the surface of the casting mold. On the one hand, raw materials can be saved, and more importantly, it can play a protective role for the casting mold and improve the heat shock resistance of the casting mold.

[0017] In the cyclic casting device with the structure of the present invention, since a layer of fine particle material and metal dust material can be pre-laid in the casting mold by the feeding sieve, when the molten metal liquid flows from the chute into the casting mold, the molten metal liquid first contacts the particle material and metal dust material and absorbs a part of the heat. On the one hand, the particle material and metal dust material are melted into molten metal liquid as part of the raw materials, and on the other hand, the molten metal liquid indirectly impacts the surface of the casting mold. The casting mold and the particle material are isolated by the metal dust and particle material. Therefore, the heat shock on the casting mold is buffered, which is beneficial to improving the service life of the casting mold. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the feeding system for the cyclic casting device of the present invention;

[0019] Figure 2 is Figure 1 schematic side view;

[0020] Figure 3 It is a schematic isometric view of the structure of the embodiment of the feeding system for the cyclic casting device of the present invention, in which the flange is not shown;

[0021] Figure 4 It is a schematic diagram of the structure of the embodiment of the hopper used in the feeding system of the present invention;

[0022] Figure 5 For Figure 1 Schematic structural diagram of the top view embodiment;

[0023] Figure 6 It is a position relationship diagram of related devices or systems of the casting equipment.

[0024] Explanation of reference numerals:

[0025] 1 - Hopper;

[0026] 11 - Hopper bin; 12 - Lifting rod; 13 - Bracket; 14 - Through hole; 15 - Flange; 16 - Feeding port 1; 17 - Discharge port 1; 18 - Frustum;

[0027] 2 - Storage bin; 21 - Feeding port 2; 22 - Discharge port 2; 23 - Rectangular body; 24 - Wedge body; 25 - Long bottom side wall; 26 - Short bottom side wall; 27 - Discharge port 2;

[0028] 3 - Gantry support

[0029] 4 - Cloth sieve; 41 - Cloth sieve outlet; 42 - Rear seal

[0030] 5 - Vibration device

[0031] 6 - Suspension device; 61 - Suspension rod; 62 - Adjusting nut 1; 63 - Hanging structure 1; 64 - Vibration damping spring; 65 - Vibration damping component; 66 - Hanging structure 2; 67 - Connecting plate 1; 68 - Tension adjustment rod; 69 - Adjusting nut 2; 70 - Spring base; 71 - Connecting plate 2;

[0032] 9 - Casting equipment; 91 - Head pulley; 92 - Tail pulley; 93 - Casting mold; 94 - Cloth system; 95 - Chute; 96 - Guide rail. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as Figures 1 to 5As shown, the cloth system of the embodiment of the present invention at least includes a hopper 1, which collects fine metal particles and metal dust. The hopper includes a hopper bin 11 and a lifting rod 12. The hopper bin 11 is a container with openings at both the upper and lower ends. The upper opening is the first feeding port 16, and the lower opening is the first discharging port 17. The first discharging port 17 is in the shape of a tapered hole, and the inner diameter D1 of its upper opening is smaller than the inner diameter D2 of its lower opening. At the first feeding port, a bracket 13 is provided, and a through hole 14 is provided on the bracket. The through hole 14 is collinear with the center line of the first discharging port. The upper end of the lifting rod 12 passes through the through hole 14 and is located outside the hopper bin 11. A tapered platform 18 is provided at the lower end of the lifting rod. The tapered platform 18 is located inside the first discharging port 17, and its taper is the same as that of the first discharging port. Its major diameter and minor diameter are respectively smaller than the major diameter and minor diameter of the discharging port, and its major diameter is larger than the inner diameter D1 of the upper opening of the discharging port. A flange 15 serving as a blocking structure is provided on the lifting rod above the bracket. The size of the flange 15 is such that it cannot pass through the through hole 14, and its shape is not limited. The distance from below the flange 15 to the upper end face of the tapered platform is greater than the distance between the upper surface of the bracket and the upper opening of the first discharging port, preferably greater than or equal to the distance from the upper surface of the bracket to the lower opening of the first discharging port. In this way, when the lifting rod is in the falling position and is caught by the flange, the tapered platform disengages from the first discharging port, and the material can flow out from the first discharging port. Preferably, the bracket is in the shape of a cross, and the through hole is located at the center of the cross. With the hopper having the structure of the present invention, the bottom of the lifting rod 12 has a conical platform structure, which cooperates with the tapered hole of the discharging port. During hoisting and loading, the hopper is lifted by pulling the lifting rod. Since the major diameter of the tapered platform is larger than the inner diameter D1 of the upper opening of the first discharging port, when the lifting rod is lifted, the tapered platform cooperates with the tapered hole to block the discharging port. When it is necessary to distribute the material in the casting mold, the hopper is placed on a support above the casting mold, and the hopper bin 11 is supported by the support. The lifting rod is relaxed, and the lifting rod falls and is caught by the flange. The tapered platform falls from the tapered hole, creating a gap between the tapered platform and the first discharging port, facilitating the outflow of the material from the first discharging port. A better embodiment is that the upper part of the hopper bin 11 is cylindrical and the lower part is conical, forming a structure where the first discharging port is much smaller than the first feeding port, which helps to discharge the material evenly.

[0035] In order to distribute the materials more evenly, it is preferably to set up a material sieve 4. A storage bin 2 is arranged between the material sieve 4 and the hopper 1. The hopper 1 is supported by the storage bin 2, and uniform discharging is achieved. An upper opening is provided above the storage bin 2 as the second feeding port 21, which is used to communicate with the first discharging port 17 of the hopper 1. A lower opening is provided below the storage bin 2 as the second discharging port 22. The storage bin is arranged on the support 3 and is fixed and supported by the support 3. The hopper 1 is located above the storage bin 2, and its bottom is inserted and connected in cooperation with the second feeding port of the storage bin. The body of the storage bin is preferably configured such that the upper part is a rectangular body 23 and the lower part is a wedge-shaped body 24. Thus, its second discharging port 27 is configured as a long strip-shaped opening, which helps the powder and fine particles to fall evenly from the storage bin. The center line of the second feeding port of the storage bin is collinear with the center line of the first discharging port of the hopper. The second discharging port of the storage bin should be offset from the center line of the first discharging port of the hopper. Preferably, the projection of the first discharging port entirely falls on an inclined bottom side wall of the storage bin at a position above the second discharging port 27. In this way, the materials entering the storage bin from the first discharging port do not directly fall into the second discharging port, but first fall onto a bottom side wall of the storage bin and then slide down from this bottom side wall. The opening of the second discharging port is in a narrow strip shape. When the materials fall from the first discharging port into the storage bin, they are in a dot shape or in a piled state. When the materials slide to the second discharging port, they are intercepted by the second discharging port. Only a small part directly falls from the second discharging port. Therefore, the materials in the storage bin accumulate and spread to both sides along the length direction of the second discharging port, turning the dot-shaped or conical materials into linear or strip-shaped distributed materials and then discharging evenly along the length direction of the second discharging port. The materials falling from the second discharging port onto the material sieve are in a linear or strip shape, achieving uniform discharging. The material sieve 4 is located below the storage bin 2, and its length direction is the same as the length direction of the second discharging port. Moreover, the projection of the second discharging port is located inside the material sieve. The material sieve is fixed to the support 3 or the storage bin 2 through a suspension device 6. A vibration device 5 is arranged on the material sieve to apply vibration to the material sieve. Preferably, the vibration device 5 is located at one end opposite to the material sieve outlet 41, that is, at the end provided with the rear seal 42, so that a relatively stable vibration can be generated at the outlet end of the material sieve.The fabric sieve suspension device 6 can be four suspension rods, each suspension rod located at a corner of the fabric sieve. One end of the suspension rod is connected to the fabric sieve, and the other end is connected to the storage bin or the frame. The lengths of the suspension rods are equal to adjust the inclination angle of the fabric sieve. It can also be a combination of the suspension rod 61 and the damping spring 64. The upper end of the suspension rod is connected to one end of the damping spring 64, the other end of the damping spring is connected to the storage bin or the frame, the lower end of the suspension rod is connected to the fabric sieve, or the lower end of the suspension rod is connected to one end of the damping spring, and the other end of the damping spring is connected to the fabric sieve. The upper end of the suspension rod is fixedly connected to the storage bin or the frame. It is preferably to use the suspension device 6 with the following structure to fix the fabric sieve. It includes a suspension rod 61 and a damping component 65. The upper end of the suspension rod 61 is connected to the storage bin 3 or the support 4 through a first connecting plate 67. The lower end is provided with a hanging structure 63 for connecting with a hook or a hanging ring. The damping component includes a tension adjustment rod 68 and a damping spring 64. The upper end of the tension adjustment rod 68 is provided with a hook as the second hanging structure 66 or a hanging ring for connecting with a hook. The lower end is provided with an adjusting thread. The damping spring 64 is sleeved outside the tension adjustment rod 68. An adjusting nut 69 is provided below the damping spring at the lower end of the tension adjustment rod 68. The adjusting nut 69 is threadedly connected with the adjusting thread. A second connecting plate is provided at the end of the tension adjustment rod where the hanging structure is provided. The second connecting plate 71 is located above the damping spring. A through hole is provided on the second connecting plate 71. The tension adjustment rod passes through the through hole and is movably connected to the second connecting plate. The second connecting plate is fixedly connected to the fabric sieve. The upper end of the damping spring is fixedly connected to the second connecting plate. By adjusting the position of the adjusting nut 69, the elastic force of the damping spring can be adjusted to adapt to different working conditions. It is preferably to provide a spring base 70 at the lower end of the damping spring. The axial projection of the damping spring is within the end face range of the spring base 70. The lower end of the damping spring is fixedly connected to the spring base. In this way, it has a better supporting and fixing effect on the damping spring. In a better implementation manner, the upper end of the suspension rod is provided with an adjusting thread. A through hole for the suspension rod to pass through is provided on the first connecting plate. Adjusting nuts are provided above and below the first connecting plate. By adjusting the position of the adjusting nuts, the working length of the suspension rod can be adjusted to adjust the suspension height of the fabric sieve 4. A pair of suspension devices are respectively provided on both sides of the fabric sieve, symmetrically arranged left and right. The fabric sieve is inclined. It is inclined downward from the end of the fabric sieve provided with the rear seal 42 to the opening 41 of the fabric sieve. By setting the positions of the first connecting plates and the lengths of the suspension rods, the inclination angle can be adjusted. The vibration device 5 can adopt a vibration motor. The vibration motor is arranged at the rear seal end of the vibrating screen through fixing bolts. During operation, the transmission of vibration can be reduced through the damping spring 64 and the hanging structure 65, preventing fatigue damage to the gantry support 3, the storage bin 2, etc., so as to improve the overall service life.With the suspension device of the present invention, the first connecting plate of the damping component is fixedly connected to the cloth sieve, and the tension adjusting rod is movably connected to the first connecting plate through a through hole. When vibrating, the first connecting plate drives the damping spring to vibrate. Since the damping spring and the tension adjusting rod are sleeved and movably connected, the damping spring and the first connecting plate axially move along the tension rod outside the tension adjusting rod, and the cloth sieve vibrates freely. The damping spring transmits a small part of the vibration to the tension adjusting rod. The upper end of the tension adjusting rod is movably connected to the lower end of the suspension rod through a hanging structure. The slight vibration is absorbed by the up and down movement between the second hanging structure of the adjusting rod and the first hanging structure of the suspension rod. The vibration of the suspension rod is even more slight, realizing the damping of the storage bin and the frame. Since the cloth sieve is lifted by the suspension device and is only connected to the storage bin or the frame through the suspension rod, the vibration caused by the vibration device is absorbed by the damping component. Therefore, the damping of the entire system is realized. The length of the damping spring can be adjusted by adjusting the distance between the adjusting nut and the second connecting plate, thereby adjusting its elastic force, and further adjusting the vibration uniformity and amplitude of the entire cloth sieve. After the material falling from the storage bin reaches the cloth sieve, it is more evenly distributed under the vibration of the vibration device and falls into the casting mold located below it along its inclined bottom.

[0036] A relatively good structure is that the length of one bottom side wall of the two bottom side walls of the storage bin is longer than the length of the other side wall opposite to it, and the bottom end of the long bottom side wall 24 crosses the center line o-o of the first discharge port. Preferably, the inclination angle of the long bottom side wall 24 is greater than the inclination angle of the short bottom side wall 23. The long bottom side wall is located at the rear sealing end of the cloth sieve. With this structure, the space between the long bottom side wall for receiving materials and the cloth sieve is larger, which is beneficial to reducing the interference of vibration on the storage bin.

[0037] A relatively good size for the first discharge port and the second discharge port is: the length of the second discharge port is 800 - 1200 mm, the width is 30 - 40 mm, and the small diameter of the first discharge port is 80 - 120 mm. For example, in a specific embodiment, the length of the second discharge port is 1000 mm, the width is 35 mm, and the small diameter of the first discharge port is 100 mm.

[0038] A further object of the present invention is to provide a cyclic casting device 9 provided with the above-mentioned feeding system, including a head wheel 91, a tail wheel 92, a linear guide 96 located between the head wheel and the tail wheel, and an arc-shaped guide connecting the linear guide 96. A running trolley for carrying the casting mold 93 is arranged on the guide. The casting mold is arranged on the top of the running trolley. A chute 95 for pouring molten metal liquid into the casting mold is arranged above the head wheel end of the linear guide. A foregoing feeding system 94 is arranged between the head wheel and the chute. The above structures are all prior arts and will not be described in detail. The cloth sieve is inclined above the guide, and the inclined direction faces the forward direction of the casting mold, and the cloth is fed from the cloth sieve into the casting mold.

[0039] For the cyclic casting equipment adopting the structure of the present invention, when the hopper collects metal fine particles and metal dust, the lifting rod 12 is hoisted by the hoisting device. The frustum of the lifting rod forms a taper fit connection with the bottom discharge port 1 of the hopper to block the discharge port 1. After collecting the metal fine particles and metal dust, the discharge port 1 of the hopper is aligned with the feed port 2 of the storage bin through the hoisting device, and the bottom of the hopper is seated on the feed port 2 of the storage bin. The discharge port 1 of the hopper is located inside the feed port 2 of the storage bin. After releasing the lifting rod, the lifting rod drops, and the lower frustum of the lifting rod loses the fit with the discharge port 1, and the discharge port 1 opens. The material enters the storage bin from the discharge port 1. Since the discharge port 1 and the discharge port 2 are offset, the material falls on an inclined bottom side wall of the storage bin after falling from the discharge port 1. Under the action of the strip-shaped discharge port 2, the material is evenly distributed along the length direction of the discharge port 2 on the discharge port 2 and falls onto the cloth sieve in a strip or line shape, so that the material can evenly fall onto the cloth sieve to achieve the first material leveling. Inside the cloth sieve, the material is further dispersed and evenly distributed under the vibration of the vibration device, and thus discharges from the cloth sieve more evenly and spreads on the top of the casting mold. Since the casting mold receives the cloth during the forward movement, the material is evenly distributed in the casting mold and forms a protective layer on the top of the casting mold, laying a foundation for the casting mold. After cloth is placed in the casting mold and then molten metal liquid is received, on the one hand, the material is melted by the molten metal liquid, playing a role in recycling; on the other hand, after the molten metal liquid falls on the casting mold, it first contacts the distributed metal particles and metal dust, so the thermal impact force of the molten metal liquid on the casting mold can be buffered, which is beneficial to protecting the casting mold, reducing the thermal corrosion of the molten metal liquid on the casting mold, and improving the service life of the casting mold.

Claims

1. Circulating casting equipment, characterized in that, it includes a head wheel, a tail wheel, a linear guide rail located between the head wheel and the tail wheel, and a curved rail connecting the linear guide rail. A running trolley for transporting casting molds is arranged on the linear guide rail and the curved rail. The casting mold is located on the top of the running trolley. A feeding system and a chute are arranged at one end of the linear guide rail on the same side as the head wheel. The chute is inclined above the linear guide rail, and its lower end faces the casting mold passing below it. The feeding system is located in the space between the chute and the head wheel. The feeding system includes a hopper, a storage bin, a feeding screen, and a vibration device. The feeding system collects the fine particles and metal dust generated during the casting process through the hopper, then disperses them through the storage bin so that they evenly fall into the feeding screen, and then the feeding screen spreads the collected fine particles and metal dust as raw materials in the metal casting process onto the casting mold body. When the feeding system feeds the material onto the casting mold, the running trolley carries the casting mold forward so that the feeding screen distributes the material in the casting mold to cover the top of the casting mold. When the casting mold passes under the chute, it receives the molten metal liquid.

2. The circulating casting equipment according to claim 1, characterized in that, the hopper is located above the storage bin, the feeding screen is located below the storage bin, the discharge port 1 of the hopper is communicated with the feeding port 2 of the storage bin. The bottom of the storage bin body is a wedge shape composed of two bottom side walls. The discharge port 2 of the storage bin is strip-shaped and located at the bottom of the wedge shape. One bottom side wall of the storage bin is opposite to the discharge port 1, and the discharge port 1 is not strip-shaped, so that the material falling from the discharge port 1 onto the bottom side wall is in a dot shape or a cone shape. The discharge port 2 is narrow strip-shaped. The sizes of the discharge port 1 and the discharge port 2 of the hopper meet the following conditions: when the material falls onto the bottom side wall and then falls along the bottom side wall to the discharge port 2, it can be dispersed along the length direction of the discharge port 2 and fall from the discharge port 2.

3. The circulating casting equipment according to claim 2, characterized in that, one bottom side wall of the wedge shape is longer than the other bottom side wall. The bottom end of the long bottom side wall crosses the center line of the discharge port 1. The discharge port 1 is located above the long bottom side wall, and its projection is located on the long bottom side wall.

4. The circulating casting equipment according to claim 1, characterized in that, the feeding screen is inclined, inclined downward from the rear seal towards the opening direction of the feeding screen. A vibration device is arranged at the rear seal end of the feeding screen. The feeding screen is suspended and fixed through a suspension device.

5. The circulating casting equipment according to claim 4, characterized in that, Each of the suspension devices includes a suspension rod and a vibration damping assembly. The upper end of the suspension rod is provided with an adjusting thread. The upper end of the suspension rod passes through a through hole provided in the first connecting plate. Adjusting nuts are respectively threadedly connected to the adjusting threads above and below the first connecting plate. The length of the suspension rod below the first connecting plate is adjusted by the adjusting nuts. The first connecting plate is fixedly connected to the storage bin or the frame. A first hanging structure is provided at the lower end of the suspension rod. The vibration damping assembly includes a vibration damping spring and a tension adjusting rod. A second hanging structure for connecting with the first hanging structure is provided at the upper end of the tension adjusting rod. An adjusting thread is provided at the lower end of the tension adjusting rod. The vibration damping spring is sleeved outside the tension adjusting rod. The second connecting plate is fixedly connected to the cloth sieve. The lower end of the tension adjusting rod passes through a through hole provided in the second connecting plate. An adjusting nut is threadedly connected to the thread below the second connecting plate. The upper end of the vibration damping spring is fixedly connected to the second connecting plate.

6. The circulating casting equipment according to claim 5, characterized in that a spring seat is provided at the lower end of the vibration damping spring, and the lower end of the vibration damping spring is fixedly connected to the spring seat. The spring seat is located above the adjusting nut. The length of the spring is adjusted by adjusting the position of the adjusting nut so as to adjust the elastic force of the spring.

7. The circulating casting equipment according to claim 5, characterized in that the hopper includes a hopper bin, a lifting rod and a bracket. An inlet is provided at the upper end of the hopper bin. An outlet is provided at the lower end of the hopper bin. The outlet is in the shape of a tapered hole, and its large inner diameter is located below. A frustum is provided at the lower end of the lifting rod. The taper of the frustum is the same as that of the tapered hole. The large diameter of the frustum is larger than the small diameter of the tapered hole. The frustum is movably connected to the tapered hole in a matching manner. A flange is provided at the upper end of the lifting rod. The bracket is arranged in the inlet. A through hole is provided at the center of the bracket. The flange is located above the bracket, and its projection covers the through hole. When the suspension rod drops and the flange covers the through hole, the frustum is separated from the tapered hole. When the suspension rod is lifted, the frustum is connected to the tapered hole in a matching manner to block the tapered hole. The hopper bin of the hopper includes a cylinder at the upper part and a conical cylinder at the lower part. The cylinder and the conical cylinder are fixedly connected as a whole.

8. The circulating casting equipment according to claim 5, characterized in that the first hanging structure is a hook or a hanging ring, and the second hanging structure is a hook or a hanging ring. The first hanging structure and the second hanging structure are connected by hanging a hook on a hanging ring or both are connected by hanging a hook on a hook.

9. The circulating casting equipment according to claim 4, characterized in that the vibration device is a vibration motor.

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