Accurate metering type feeding device for double screw extruder

Abstract

The utility model relates to a feeding device technical field, especially in kind precision metering type feeding device for double screw extruder, including base, the top of base is set up and is provided with the feeding channel, the one side open end of feeding channel is fixed and installed with the closing plate, the inside embedding of closing plate is fixed with bearing, the inner ring wall of bearing is installed with the shaft rod no.1 of interference fit, the inside surface fixed winding of feeding channel has spiral piece no.1, the outer end of shaft rod no.1 is provided with motor no.1, the outer ring wall of motor no.1 is fixed through the support and the surface of closing plate, the inside of motor no.1 is provided with the shaft no.1 for driving. The utility model discloses the feeding channel as the initiative conveying channel, can ensure that the material is steadily and uniformly forwardly pushed, and the spiral piece in the material cylinder realizes quantitative unloading under the motor drive, so that the process of material from the material cylinder into the feeding channel is more controllable.

Description

Technical Field

[0001] This utility model relates to the field of feeding device technology, and in particular to a precision metering feeding device for a twin-screw extruder. Background Technology

[0002] The screw extruder is a key processing equipment widely used in the plastics, rubber, food, and chemical industries. Its core component is a rotating screw with helical grooves, which is installed inside a heated barrel.

[0003] The screw, through its rotational motion, generates axial thrust on the material within the barrel, continuously conveying the material from the feed inlet towards the extruder head. This is the most basic function of an extruder. For example, the existing technology described in Chinese Patent Publication No. "CN205588606U" is a twin-screw extruder, relating to the field of plastic processing equipment technology. Its feeding device includes a feeding motor, a feeding reducer, a feeding barrel, a feeding screw, a feeding port, a front mixing chamber, a hopper, a guide plate, a mixing motor, a mixing paddle, and a heating wire. The feeding screw is located inside the feeding barrel, and the feeding motor is connected to the feeding screw via the feeding reducer. The feeding port is located on the lower left side of the feeding barrel and connected to the barrel. The front mixing chamber is located on the upper left end of the feeding barrel, and the hopper is located on the upper left end of the front mixing chamber. The guide plate is located inside the front mixing chamber, with a mixing motor at the bottom and a mixing paddle above it, connected to the mixing motor. A heating wire runs through the interior of the mixing paddle. It preheats and disperses the material before feeding, effectively improving the shortcomings of low heating efficiency and poor dispersion uniformity of twin-screw extruders.

[0004] Currently, in order to ensure a stable and constant feeding effect, the feeding area of ​​some screw extruders also adopts the form of screw feeding. However, most screw feeding systems only control the feeding amount by controlling the motor speed, but there is still a large error in the actual feeding accuracy. Therefore, it is necessary to add a load-bearing metering structure to the screw feeding area to assist in controlling the feeding accuracy. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a precision metering feeding device for a twin-screw extruder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a precision metering feeding device for a twin-screw extruder, including a base, a feeding channel erected on the top of the base, a sealing plate fixedly installed on one open end of the feeding channel, a bearing embedded and fixed inside the sealing plate, a shaft installed with an interference fit on the inner ring wall of the bearing, a spiral blade fixedly wound on the inner surface of the shaft, a motor installed at the outer end of the shaft, the outer ring wall of the motor being fixed to the surface of the sealing plate by a bracket, a drive shaft installed inside the motor, and the end of the drive shaft being connected to the shaft via a coupling. The upper end of the feeding channel is fixed with several equidistantly distributed material cylinders. The upper opening of the material cylinders is fixedly installed with a motor II by a bracket. The motor II has a rotating shaft II for driving inside, and the end of the rotating shaft II is connected to a shaft II via a coupling. The surface of the shaft II is wound with a spiral blade II.

[0007] Preferably, the upper end of the base is covered with a clamp, which has an arched structure, and the inner side of the clamp is fitted to the outer ring wall of the feeding channel.

[0008] Preferably, an alignment block is fixedly installed on the upper inner wall of the clamp, and an alignment seat corresponding to the position of the alignment block is fixedly installed on the outer ring wall of the feeding channel, with the surface of the alignment block inserted into the interior of the alignment seat.

[0009] Preferably, both ends of the clamp are fixed with an inner sleeve, and the surface of the base is fixedly installed with a threaded post corresponding to the position of the inner sleeve, and the surface of the threaded post is slidably sleeved with the inside of the inner sleeve.

[0010] Preferably, a threaded cap is threaded onto the end of the threaded column, and one end of the threaded cap is tightly fitted against the end face of the inner sleeve.

[0011] Preferably, a plurality of limiting posts are fixedly arranged side by side at the lower end of the base, and a limiting sleeve is slidably sleeved on the surface of the limiting posts.

[0012] Preferably, the surfaces of several limiting sleeves are jointly mounted on the same base, which has a Z-shaped structure and mounting holes that penetrate through the base on both sides.

[0013] Preferably, pressure sensors are fixedly distributed on the upper end of the base, and the measuring end of the pressure sensors is fitted to the lower end surface of the base.

[0014] Preferably, extension plates are fixedly installed on both sides of the base, and several limiting sleeves are distributed through the surface of the extension plates. Limiting posts are slidably sleeved inside the limiting sleeves, and the upper end of the limiting posts is fixedly installed to the lower end face of the base.

[0015] The design scheme proposed in this utility model has the following beneficial effects in application: 1. The feeding channel of this utility model serves as an active conveying channel, ensuring that the material is pushed forward smoothly and evenly. The spiral blades inside the cylinder are driven by a motor to achieve quantitative feeding, making the process of material entering the feeding channel from the cylinder more controllable. 2. The base and the feeding channel of this utility model are reinforced by an arched clamp. The inner side of the clamp is tightly fitted to the outer wall of the feeding channel, and the two ends are locked and fixed to the base by threaded columns and threaded caps. This effectively prevents the equipment from shifting or loosening due to vibration during operation, thus ensuring the stability of long-term continuous operation. 3. Each material cylinder of this utility model is equipped with an independent motor and a screw feeding structure, which can realize the independent and quantitative output of materials in each material cylinder. The pressure sensor set under the base can detect the total weight change of the base and the components above in real time, thereby indirectly reflecting the amount of material in the material cylinder. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the entire utility model; Figure 3 For the present utility model Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the feeding channel and the internal structure of the material cylinder of this utility model; Figure 5 This is a partially enlarged schematic diagram of the material cylinder of this utility model.

[0017] In the diagram: 1. Base; 11. Feeding channel; 12. Sealing plate; 13. Bearing; 14. Shaft 1; 15. Spiral blade 1; 16. Motor 1; 17. Material cylinder; 18. Motor 2; 19. Shaft 2; 110. Spiral blade 2; 2. Clamp; 21. Alignment seat; 22. Alignment block; 23. Internal sleeve; 24. Threaded post; 25. Threaded cap; 3. Limiting post 1; 31. Limiting sleeve 1; 32. Base; 33. Mounting hole; 34. Pressure sensor; 4. Extension plate; 41. Limiting sleeve 2; 42. Limiting post 2. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-5A precision metering feeding device for a twin-screw extruder includes a base 1, a feeding channel 11 erected on the top of the base 1, a sealing plate 12 fixedly installed on one open end of the feeding channel 11, a bearing 13 embedded and fixed inside the sealing plate 12, a shaft 14 interference fitly installed on the inner ring wall of the bearing 13, a spiral blade 15 fixedly wound on the inner surface of the shaft 14, a motor 16 installed at the outer end of the shaft 14, the outer ring wall of the motor 16 fixed to the surface of the sealing plate 12 by a bracket, a drive shaft 1 installed inside the motor 16, and the end of the drive shaft 1 and the shaft 14 are connected by a coupling. The feeding channel 11 serves as the active feeding channel, ensuring stable material feeding. After the material falls into the barrel 17, the power to the motor 16 is turned on, enabling the shaft 14 to rotate and drive the spiral blade 15 to rotate, thereby realizing the spiral conveying of the material. Several equidistantly distributed material cylinders 17 are fixed through the upper end of the feeding channel 11. A motor 18 is fixedly installed at the upper opening of the material cylinder 17 by a bracket. The motor 18 has a rotating shaft 2 for driving inside, and the end of the rotating shaft 2 is connected to a shaft rod 19 through a coupling. A spiral blade 110 is wound and fixed on the surface of the shaft rod 19. A certain amount of material can be pre-stored in the material cylinder 17. After the power of the motor 18 is turned on, the rotating shaft 2 rotates, and the shaft rod 19 rotates, so that the material can be spirally fed out of the material cylinder 17.

[0020] The upper end of the base 1 is covered with a clamp 2, which is an arched structure. The inner side of the clamp 2 is attached to the outer ring wall of the feeding channel 11. The clamp 2 can further improve the installation stability of the base 1 and the feeding channel 11.

[0021] The clamp 2 has an alignment block 22 fixedly installed on the upper inner wall, and an alignment seat 21 corresponding to the position of the alignment block 22 is fixedly installed on the outer ring wall of the feeding channel 11. The surface of the alignment block 22 is inserted into the interior of the alignment seat 21. By inserting and docking the alignment block 22 and the alignment seat 21, the clamp 2 and the feeding channel 11 can be stably docked.

[0022] Both ends of the clamp 2 are fixed with an inner sleeve 23. The surface of the base 1 is fixedly installed with a threaded post 24 corresponding to the position of the inner sleeve 23. The surface of the threaded post 24 is slidably sleeved with the inside of the inner sleeve 23. By passing the threaded post 24 through the inner sleeve 23, the clamp 2 and the base 1 can be quickly positioned.

[0023] The threaded post 24 is threaded with a threaded cap 25 at its end. One end of the threaded cap 25 is tightly fitted to the end face of the inner sleeve 23. The threaded cap 25 and the threaded post 24 are threaded together to achieve stable installation of the clamp 2 and the base 1.

[0024] Among them, several limiting posts 3 are fixedly arranged side by side at the lower end of the base 1. The surface of the limiting post 3 is slidably sleeved with the limiting sleeve 31. The limiting post 3 can slide inside the limiting sleeve 31, so that the material cylinder 17 is gradually emptied or the material chamber is gradually increased. The base 1 can move up and down stably in a straight line based on the base 32.

[0025] Among them, several limiting sleeves 31 are mounted on the same base 32. The base 32 has a Z-shaped structure. Both sides of the base 32 have mounting holes 33 that penetrate through it. By passing screws or bolts through the mounting holes 33, the base 32 can be horizontally fixed to the mounting point.

[0026] Pressure sensors 34 are fixedly distributed on the upper end of the base 32. The measuring end of the pressure sensor 34 is attached to the lower end surface of the base 1. By weighing the base 1 through the pressure sensor 34, the weight can be detected when the material in the cylinder 17 increases or decreases. The pressure sensor 34 is also connected to an external PLC control console. By setting a threshold, when the material weighs a certain value, motor 16 and motor 2 18 will be turned off.

[0027] Both sides of the base 32 are fixedly installed with extension plates 4. Several limiting sleeves 41 are distributed through the surface of the extension plates 4. Limiting posts 42 are slidably connected inside the limiting sleeves 41. The upper end of the limiting posts 42 is fixedly installed with the lower end face of the base 1. By sliding the limiting posts 42 inside the limiting sleeves 41, the base 1 can be assisted in sliding and limiting the base 32 up and down.

[0028] Working principle: The feeding channel 11 in this solution serves as the core conveying component. A sealing plate 12 is fixedly installed at one of its open ends. A bearing 13 embedded inside the sealing plate 12 supports a shaft 14. A spiral blade 15 is fixedly wound around the surface of the shaft 14. When the motor 16 is powered on and started, its shaft drives the shaft 14 to rotate via a coupling, causing the spiral blade 15 to rotate within the feeding channel 11. This spiral propulsion method stably and continuously conveys the material from the inlet to the outlet. This process ensures uniform material flow within the feeding channel 11, preventing blockages or intermittent feeding, thus achieving basic conveying functions. Simultaneously, above the feeding channel 11... Multiple equidistantly distributed material cylinders 17 are fixed throughout the material cylinder 17. Each material cylinder 17 serves as a storage unit, providing material to the feeding channel 11. A motor 18 is mounted on the upper end of the material cylinder 17 via a bracket. The shaft of the motor 18 is connected to a shaft 19 via a coupling. A spiral blade 110 is wound around the surface of the shaft 19. When the motor 18 is powered on, the shaft 19 drives the spiral blade 110 to rotate, conveying the pre-stored material in the material cylinder 17 downwards to the feeding channel 11, thus achieving quantitative feeding. The entire conveying process is controlled collaboratively by the motor 16 and the motor 18 to ensure continuous and stable transfer of material from the material cylinder 17 to the feeding channel 11. A series of limit posts 3 are fixed side-by-side below the base 1. Limit posts 3 slide on the surface of limit sleeves 31, which are mounted on the base 32. The base 32 has a U-shaped structure with mounting holes 33 on both sides, allowing it to be fixed to external points with screws. Pressure sensors 34 are distributed on the upper end of the base 32. The measuring end of the pressure sensor 34 is in contact with the lower end face of the base 1. When the material in the cylinder 17 increases or decreases, the base 1 moves stably in the vertical direction based on the sliding of the limit posts 3 within the limit sleeves 31. The pressure sensors 34 detect the weight changes of the base 1 and its components, including the feeding channel 11 and the cylinder 17, in real time. The pressure sensor 34 is connected to an external PLC control console. By setting a weight threshold, when the detected weight reaches a specific value during the feeding process, the motor 16 and motor 28 will be automatically shut off to stop feeding. In addition, extension plates 4 are fixed on both sides of the base 32. The surface of the extension plates 4 passes through the limiting sleeve 2 41. The limiting sleeve 2 41 is slidably fitted with the limiting post 2 42 inside the limiting sleeve 2 41. The upper end of the limiting post 2 42 is fixed to the base 1. The limiting post 2 42 slides in the limiting sleeve 2 41, which helps the base 1 to remain horizontal and stable when moving up and down, preventing tilting and ensuring the accuracy of the measurement data of the pressure sensor 34, thereby achieving high-precision material metering and control. The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision metering feeding device for a twin-screw extruder, comprising a base (1), characterized in that: A feeding channel (11) is erected above the base (1). A sealing plate (12) is fixedly installed on one side of the feeding channel (11). A bearing (13) is embedded and fixed inside the sealing plate (12). A shaft (14) is installed on the inner ring wall of the bearing (13) with an interference fit. A spiral blade (15) is fixedly wound on the inner surface of the feeding channel (11). A motor (16) is provided at the outer end of the shaft (14). The outer ring wall of the motor (16) is fixed to the surface of the sealing plate (12) through a bracket. A rotating shaft for driving is provided inside the motor (16). The end of the rotating shaft and the shaft (14) are connected by a coupling. The upper end of the feeding channel (11) is fixed with several equally spaced material cylinders (17). The upper opening of the material cylinder (17) is fixedly installed with a motor (18) by a bracket. The motor (18) is provided with a rotating shaft (2) for driving. The end of the rotating shaft (2) is connected to a shaft (29) via a coupling. The surface of the shaft (29) is wound with a spiral blade (110).

2. The precision metering feeding device for a twin-screw extruder according to claim 1, characterized in that: The upper end of the base (1) is covered with a clamp (2), which is an arched structure. The inner side of the clamp (2) is attached to the outer ring wall of the feeding channel (11).

3. The precision metering feeding device for a twin-screw extruder according to claim 2, characterized in that: The upper end of the inner wall of the clamp (2) is fixedly installed with a positioning block (22), and the outer ring wall of the feeding channel (11) is fixedly installed with a positioning seat (21) corresponding to the position of the positioning block (22). The surface of the positioning block (22) is inserted into the interior of the positioning seat (21).

4. The precision metering feeding device for a twin-screw extruder according to claim 3, characterized in that: Both ends of the clamp (2) are fixed with an inner sleeve (23). The surface of the base (1) is fixedly installed with a threaded post (24) corresponding to the position of the inner sleeve (23). The surface of the threaded post (24) is slidably connected to the inside of the inner sleeve (23).

5. The precision metering feeding device for a twin-screw extruder according to claim 4, characterized in that: The threaded post (24) is threaded with a threaded cap (25) at its end, and one end of the threaded cap (25) is tightly fitted to the end face of the inner sleeve (23).

6. The precision metering feeding device for a twin-screw extruder according to claim 5, characterized in that: Several limiting posts (3) are fixedly arranged side by side at the lower end of the base (1), and the surface of the limiting posts (3) is slidably sleeved with the limiting sleeve (31).

7. The precision metering feeding device for a twin-screw extruder according to claim 6, characterized in that: Several limiting sleeves (31) are mounted on the same base (32). The base (32) has a zigzag structure and mounting holes (33) that penetrate through it are opened on both sides of the base (32).

8. The precision metering feeding device for a twin-screw extruder according to claim 7, characterized in that: Pressure sensors (34) are fixedly distributed on the upper end of the base (32), and the measuring end of the pressure sensor (34) is attached to the lower end surface of the base (1).

9. A precision metering feeding device for a twin-screw extruder according to claim 8, characterized in that: Both sides of the base (32) are fixedly installed with extension plates (4). Several limiting sleeves (41) are distributed through the surface of the extension plates (4). Limiting posts (42) are slidably connected inside the limiting sleeves (41). The upper end of the limiting posts (42) is fixedly installed with the lower end of the base (1).

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