Multi-stage extrusion molding device

Abstract

The utility model relates to the technical field of pulverized coal processing, and particularly discloses a multi-stage extrusion molding device which comprises a supporting bottom frame, the upper surface of the supporting bottom frame is fixedly connected with a material guiding pipe, the upper surface of the material guiding pipe is fixedly connected with a material mixing cylinder, and the upper surface of the material mixing cylinder is provided with a feeding port. A first motor is fixedly connected to the upper surface of the material mixing cylinder, a stirring cylinder is fixedly connected to the output end of the first motor, a drying air pipe is installed on the side surface of the material mixing cylinder in a penetrating mode, and a second motor is fixedly connected to the side surface of the material guiding pipe. According to the multi-stage extrusion molding device, the stirring cylinder is driven by the first motor to rotate and is matched with the cross-shaped crushing blade, all-directional stirring and caking crushing can be conducted on pulverized coal, it is ensured that materials are evenly mixed, particles are fine, the drying air pipes are obliquely upward and arranged in a circumferential array mode, hot air flow evenly penetrates through a pulverized coal layer, the contact path is prolonged, and the drying efficiency is improved. Moisture is efficiently removed, and obstruction of the moisture to particle combination is reduced.

Description

Technical Field

[0001] This utility model relates to the field of coal powder processing technology, specifically a multi-stage extrusion shaping device. Background Technology

[0002] Coking in low-rank coal powder via multi-stage extrusion molding is a phenomenon that occurs during specific processing and subsequent use of low-rank coal powder. It involves two key stages: coal powder molding and coking. Low-rank coal, such as lignite and long-flame coal, has characteristics such as high moisture content, high volatile matter, low calorific value, and low mechanical strength. Direct use presents many problems. To improve its performance, multi-stage extrusion molding technology is used. Through multi-stage extrusion, the physical structure of the coal powder is gradually changed, increasing its density and mechanical strength, and shaping the coal powder into a specific shape for more efficient subsequent use, such as making briquettes for combustion or gasification in industrial processes. The inherent characteristics of low-rank coal powder have a significant impact on coking. Its high content of alkaline oxides in ash lowers the ash melting point and increases the tendency to coke. Its high volatile matter content easily generates local high temperatures during combustion, which also promotes coking. During multi-stage extrusion molding, factors such as molding pressure, temperature, and the use of additives can change the internal structure and composition distribution of the coal powder, affecting the subsequent coking situation.

[0003] Existing low-rank coal powder extrusion molding equipment requires mixing the raw materials before feeding them for extrusion molding. However, there is a lot of moisture between the coal powder particles. During extrusion molding, the moisture will hinder the close contact and bonding between the particles, making it difficult to form a stable structure. This results in poor strength of the molded product, which is prone to loosening and breakage, thus reducing the processing effect. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage extrusion molding device to solve the problem mentioned in the background art that there is a lot of moisture between coal powder particles. During extrusion molding, the moisture will hinder the close contact and bonding between the particles, making it difficult to form a stable structure. This results in poor strength of the molded product, which is prone to loosening and breakage, thus reducing the processing effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage extrusion molding device, including a supporting base frame, a guide tube fixedly connected to its upper surface, a mixing cylinder fixedly connected to the upper surface of the guide tube, a feed inlet on the upper surface of the mixing cylinder, a first motor fixedly connected to the upper surface of the mixing cylinder, a stirring cylinder fixedly connected to the output end of the first motor, a drying air duct installed through the side surface of the mixing cylinder, a second motor fixedly connected to the side surface of the guide tube, a spiral feeding shaft installed on the inner wall of the cavity of the guide tube, a discharge pipe fixedly connected to the lower surface of one end of the guide tube, and a forming and feeding mechanism provided below the guide tube, which drives the forming mold to move via an electric push rod, then drives the forming pressure plate to press down via a cylinder, and finally feeds the material through a rotating feeding baffle.

[0006] Preferably, the stirring cylinder penetrates the upper surface of the mixing cylinder, the stirring cylinder and the mixing cylinder are rotatably connected, and a crushing blade is fixedly connected to the outer surface of the stirring cylinder, and the crushing blade is arranged in a cross shape.

[0007] By adopting the above technical solution, the stirring cylinder can rotate freely inside the mixing cylinder, ensuring that the coal powder inside the cylinder is stirred in all directions, avoiding the formation of dead zones in the mixing, and improving the uniformity of mixing.

[0008] Preferably, the drying air duct is inclined upward and arranged in a circumferential array. The spiral feeding shaft and the guide pipe are rotatably connected, and the rotating shaft of the spiral feeding shaft is fixedly connected to the output end of the second motor.

[0009] By adopting the above technical solution, the hot airflow can pass through the coal powder layer obliquely upward from below, prolonging the contact path between the hot airflow and the coal powder, improving drying efficiency, effectively removing moisture from the coal powder, and reducing the obstruction of moisture to the forming process.

[0010] Preferably, the forming and feeding mechanism includes an electric push rod, which is fixedly connected to the upper surface of the support base. A forming mold is provided on the upper surface of the support base. A cylinder is fixedly connected to the lower surface of the guide tube. A forming pressure plate is fixedly connected to the output end of the cylinder. An opening is provided on the surface of the support base, and a feeding baffle is installed on the inner wall of the opening of the support base.

[0011] By adopting the above technical solution, the position of the forming mold can be precisely controlled through the linear motion of the electric push rod, realizing the automatic switching of the mold between feeding, extrusion, and discharging stations, thereby improving the automation level of the equipment.

[0012] Preferably, the output end of the electric push rod is fixedly connected to the side surface of the molding die, and the molding die is slidably connected to the supporting base.

[0013] By adopting the above technical solution, the servo control characteristics of the electric push rod can ensure that the distance of each movement of the molding die is accurate and consistent, thus ensuring the dimensional uniformity of different batches of products.

[0014] Preferably, the surface of the forming mold is provided with an opening, and the width of the forming plate is smaller than the opening of the forming mold.

[0015] By adopting the above technical solution, the width of the forming plate is smaller than the mold opening, ensuring that the plate can freely extend into the mold during the pressing process without rubbing against or getting stuck with the inner wall of the mold, thus ensuring the smoothness of the extrusion action.

[0016] Preferably, the forming plate and the unloading baffle are correspondingly arranged, and the unloading baffle is rotatably connected to the supporting base frame, wherein the opening width of the supporting base frame is smaller than the width of the forming mold.

[0017] By adopting the above technical solution, the pressing position of the pressure plate is aligned with the opening of the discharge baffle, ensuring that the formed product can be directly pushed out from the baffle opening during unloading, avoiding deviation or scattering, and improving unloading efficiency.

[0018] Compared with the prior art, the beneficial effects of this utility model are: This multi-stage extrusion molding device:

[0019] 1. The first motor drives the stirring cylinder to rotate, which, together with the cross-shaped crushing blades, can stir and crush coal powder in all directions, ensuring that the material is mixed evenly and the particles are fine. The drying air ducts are set up in an upward and circumferential array, so that the hot airflow can pass through the coal powder layer evenly, extend the contact path, remove moisture efficiently, reduce the resistance of moisture to particle binding, and provide a dry and uniform material base for subsequent extrusion molding, avoiding the problem of loose molding caused by high moisture content.

[0020] 2. The second motor drives the spiral feeding shaft to push the material at a uniform speed, avoiding the accumulation or blockage of coal powder after mixing and drying, and ensuring the continuous and stable feeding process. In the forming feeding mechanism, the electric push rod precisely controls the movement of the forming mold to the designated station, and the cylinder drives the forming platen to apply stable axial pressure to the material, so that the coal powder particles are tightly combined, significantly improving the density and mechanical strength of the formed product. The width difference design between the opening of the forming mold and the platen avoids interference between the platen and the mold, and ensures that the material is evenly pressed to form a molded part with a clear outline and smooth surface.

[0021] 3. The feeding baffle and forming pressure plate are set accordingly. During extrusion, the opening of the support base is closed to prevent material leakage. After forming, the material is smoothly discharged by rotating the baffle. The action is gentle and precise, avoiding impact damage to the finished product. The design of the support base opening width being smaller than the mold width further ensures stable pressure during the extrusion process and improves the reliability of equipment operation. The entire set of equipment achieves full automation of feeding, mixing, drying, feeding, extrusion and unloading through the collaborative operation of multiple components, reducing manual intervention and improving processing efficiency and product consistency. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the connection between the support base and the guide tube of this utility model;

[0023] Figure 2 This is a three-dimensional structural diagram of the connection between the mixing cylinder and the feed inlet of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the connection between the first motor and the stirring cylinder of this utility model;

[0025] Figure 4 This is a three-dimensional structural diagram of the connection between the second motor and the screw feed shaft of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the connection between the support base and the discharge baffle of this utility model;

[0027] Figure 6 This is a three-dimensional structural diagram of the connection between the electric push rod and the molding die of this utility model.

[0028] In the diagram: 1. Support base frame; 2. Guide pipe; 3. Mixing cylinder; 4. Feed inlet; 5. First motor; 6. Mixing cylinder; 7. Crushing blade; 8. Drying air duct; 9. Second motor; 10. Spiral feed shaft; 11. Discharge pipe; 12. Electric push rod; 13. Forming mold; 14. Cylinder; 15. Forming plate; 16. Discharge baffle. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6This utility model provides a technical solution: a multi-stage extrusion molding device, including a supporting base frame 1, a guide pipe 2, a mixing cylinder 3, a feed inlet 4, a first motor 5, a stirring cylinder 6, a crushing blade 7, a drying air duct 8, a second motor 9, a spiral feeding shaft 10, a discharge pipe 11, an electric push rod 12, a molding die 13, a cylinder 14, a molding pressure plate 15, and a discharge baffle 16. The supporting base frame 1 has a guide pipe 2 fixedly connected to its upper surface, and a mixing cylinder 3 is fixedly connected to the upper surface of the guide pipe 2. A feed inlet 4 is provided on the upper surface of the cylinder 3. The stirring cylinder 6 penetrates the upper surface of the mixing cylinder 3, and the stirring cylinder 6 and the mixing cylinder 3 are rotatably connected. A crushing blade 7 is fixedly connected to the outer surface of the stirring cylinder 6, and the crushing blade 7 is arranged in a cross shape. Coal powder enters the mixing cylinder 3 through the feed inlet 4. The first motor 5 is started, and its output end drives the stirring cylinder 6 to rotate. The cross-shaped crushing blade 7 on the outer surface of the stirring cylinder 6 cuts and turns the coal powder, breaks up the lumpy material and accelerates the mixing, so that the coal powder particles are fine and evenly distributed.

[0031] A first motor 5 is fixedly connected to the upper surface of the mixing cylinder 3. A stirring cylinder 6 is fixedly connected to the output end of the first motor 5. A drying air duct 8 is installed through the side surface of the mixing cylinder 3. A second motor 9 is fixedly connected to the side surface of the guide pipe 2. A spiral feeding shaft 10 is installed on the inner wall of the cavity of the guide pipe 2. The drying air duct 8 is inclined upward and arranged in a circumferential array. The spiral feeding shaft 10 and the guide pipe 2 are rotatably connected. The rotating shaft of the spiral feeding shaft 10 is fixedly connected to the output end of the second motor 9. The drying air duct 8 is inclined upward and arranged in a circumferential array to introduce hot air into the mixing cylinder 3. The hot air passes through the coal powder layer from below obliquely upward, prolonging the contact time with the material, uniformly evaporating the moisture in the coal powder, reducing the moisture content, and reducing the obstruction to subsequent molding.

[0032] A discharge pipe 11 is fixedly connected to the lower surface of one end of the guide tube 2. The forming and feeding mechanism includes an electric push rod 12, which is fixedly connected to the upper surface of the support base 1. A forming mold 13 is provided on the upper surface of the support base 1. A cylinder 14 is fixedly connected to the lower surface of the guide tube 2. A forming pressure plate 15 is fixedly connected to the output end of the cylinder 14. An opening is provided on the surface of the support base 1, and a feeding baffle 16 is installed on the inner wall of the opening of the support base 1. The mixed and dried coal powder falls into the guide tube 2. The second motor 9 is started to drive the spiral feeding shaft 10 to rotate, pushing the material at a uniform speed to the discharge pipe 11. The material falls into the forming mold 13 below through the pipe. The electric push rod 12 is fixed to the support base 1, and its output end pushes the forming mold 13 to slide on the surface of the support base 1, accurately moving it to directly below the forming pressure plate 15 to complete the positioning before extrusion.

[0033] A forming and unloading mechanism is installed below the guide tube 2. This mechanism drives the forming mold 13 via an electric push rod 12, then drives the forming pressure plate 15 downwards via a cylinder 14, and finally unloads the material via a rotating unloading baffle 16. The output end of the electric push rod 12 is fixedly connected to the side surface of the forming mold 13. The forming mold 13 and the supporting base 1 are slidably connected. The surface of the forming mold 13 has an opening. The width of the forming pressure plate 15 is smaller than the opening of the forming mold 13. The forming pressure plate 15 and the unloading baffle 16 are correspondingly arranged, and the unloading baffle 16 and the supporting base 1 form a rotating... The support base 1 has an opening width smaller than the forming mold 13. The cylinder 14 is fixed to the lower surface of the guide tube 2. Its output end drives the forming plate 15 to move downward, applying axial pressure to the coal powder in the forming mold 13, so that the particles are tightly combined into a predetermined shape. After extrusion, the forming plate 15 is reset, and the discharge baffle 16 rotates to open the opening on the support base 1. The formed coal powder parts fall from the opening to complete the unloading. Since the opening width of the support base 1 is smaller than the width of the forming mold 13, the mold still partially covers the opening during unloading to avoid material leakage.

[0034] Working principle: When using this multi-stage extrusion molding device, coal powder enters the mixing cylinder 3 from the feed inlet 4. The first motor 5 drives the stirring cylinder 6 and the cross-shaped crushing blades 7 to stir and crush the material. At the same time, the upward-sloping and circumferentially arrayed drying air pipes 8 introduce hot air to dry and remove water. The mixed and dried coal powder falls into the guide pipe 2. The second motor 9 drives the spiral feeding shaft 10 to send the material to the forming mold 13 through the discharge pipe 11. The electric push rod 12 accurately positions the mold below the forming pressure plate 15. The cylinder 14 drives the pressure plate to press down and form the material. After forming, the pressure plate is reset. The material discharge baffle 16 is rotated to open the opening of the support base 1 for unloading, which increases the overall practicality.

[0035] 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, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage extrusion molding device, comprising a supporting base frame (1), on the upper surface of which a guide tube (2) is fixedly connected, and a mixing cylinder (3) is fixedly connected to the upper surface of the guide tube (2), wherein a feed inlet (4) is provided on the upper surface of the mixing cylinder (3), characterized in that: The mixing cylinder (3) is fixedly connected to the upper surface of the mixing cylinder (3), and the output end of the first motor (5) is fixedly connected to the stirring cylinder (6). The side surface of the mixing cylinder (3) is installed with a drying air pipe (8). The side surface of the guide pipe (2) is fixedly connected to a second motor (9). The inner wall of the cavity of the guide pipe (2) is installed with a spiral feeding shaft (10). The lower surface of one end of the guide pipe (2) is fixedly connected to a discharge pipe (11). A forming and feeding mechanism is set below the guide pipe (2). It drives the forming mold (13) to move through the electric push rod (12), then drives the forming pressure plate (15) to press down through the cylinder (14), and finally feeds through the feeding baffle (16).

2. The multi-stage extrusion molding device according to claim 1, characterized in that: The stirring cylinder (6) penetrates the upper surface of the mixing cylinder (3), and the stirring cylinder (6) and the mixing cylinder (3) are rotatably connected. The outer surface of the stirring cylinder (6) is fixedly connected with a crushing blade (7), and the crushing blade (7) is arranged in a cross shape.

3. The multi-stage extrusion molding device according to claim 1, characterized in that: The drying air duct (8) is inclined upward and arranged in a circular array. The spiral feeding shaft (10) and the guide pipe (2) are rotatably connected, and the rotating shaft of the spiral feeding shaft (10) is fixedly connected to the output end of the second motor (9).

4. The multi-stage extrusion molding device according to claim 1, characterized in that: The forming and feeding mechanism includes an electric push rod (12), which is fixedly connected to the upper surface of the support base (1). A forming mold (13) is provided on the upper surface of the support base (1). A cylinder (14) is fixedly connected to the lower surface of the guide tube (2). A forming pressure plate (15) is fixedly connected to the output end of the cylinder (14). An opening is provided on the surface of the support base (1), and a feeding baffle (16) is installed on the inner wall of the opening of the support base (1).

5. The multi-stage extrusion molding device according to claim 4, characterized in that: The output end of the electric push rod (12) is fixedly connected to the side surface of the molding die (13), and the molding die (13) and the support base (1) are slidably connected.

6. The multi-stage extrusion molding device according to claim 4, characterized in that: The surface of the molding die (13) is provided with an opening, and the width of the molding plate (15) is smaller than the opening of the molding die (13).

7. The multi-stage extrusion molding device according to claim 4, characterized in that: The forming plate (15) and the feeding baffle (16) are respectively arranged, and the feeding baffle (16) and the supporting base (1) are rotatably connected. The opening width of the supporting base (1) is smaller than the width of the forming mold (13).

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