Uniform feeding mechanism of screw extruder

Abstract

The utility model discloses a uniform feeding mechanism of a screw extruder, which relates to the technical field of extruders and comprises a screw feeder connected with a feed port of the extruder, a low-speed mixer connected with a feed port of the screw feeder and a high-speed mixer connected with a feed port of the low-speed mixer. The low-speed mixer comprises a discharge valve I, a storage bin, a low-speed mixing stirrer and a low-speed driving motor; the high-speed mixer comprises a discharge valve II, a mixing bin, a high-speed mixing stirrer and a high-speed driving motor; and the high-speed mixer, the low-speed mixer and the screw feeder are sequentially distributed from top to bottom. According to the utility model, the screw feeding machine, the low-speed mixer and the high-speed mixer are arranged, the high-speed mixer is responsible for full mixing, the low-speed mixer is responsible for uniform cooling, and then the screw feeding machine is used for continuously and stably conveying materials to the extruder, so that the materials are uniformly cooled and continuously and stably discharged after being mixed at a high speed.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a uniform feeding mechanism for a screw extruder. Background Art

[0002] Plastic extruders can be matched with various plastic molding auxiliary machines for pipes to form various plastic extrusion molding production lines to produce various pipe plastic products. When the extruder is extruding raw materials of different particles, it is necessary to stir the raw materials evenly before feeding and feed them evenly into the extruder, so as to effectively improve the product quality during extrusion. When the existing extruder is feeding, the material is easy to bridge in the hopper, resulting in failure to discharge the material, and the feeding speed is uneven. In addition, during the mixing process of raw materials of different particles, a large amount of friction heat will be generated when the materials are fully and evenly mixed through high-speed stirring. At this time, the high-temperature material cannot be cooled in time and will be plasticized and degraded. To this end, in response to the above problems, we provide a screw extruder uniform feeding mechanism. Utility Model Content

[0003] The utility model aims to provide a uniform feeding mechanism for a screw extruder, which is used for uniform cooling of materials after high-speed mixing and continuous and stable feeding.

[0004] To achieve the above object, the utility model provides the following technical solutions: a uniform feeding mechanism for a screw extruder, comprising a screw feeder connected to a feed port of the extruder, a low-speed mixer connected to the feed port of the screw feeder, and a high-speed mixer connected to the feed port of the low-speed mixer;

[0005] The low-speed mixer comprises a discharge valve 1, a storage bin, a low-speed mixer and a low-speed drive motor, wherein the discharge valve 1 is connected to the discharge port at the lower end of the storage bin, the low-speed mixer is arranged along the axial direction of the storage bin, and the output end of the low-speed drive motor is connected to the low-speed mixer;

[0006] The high-speed mixer comprises a second discharge valve, a mixing bin, a high-speed mixing agitator and a high-speed drive motor, wherein the second discharge valve is connected to the discharge port at the lower end of the mixing bin, the high-speed mixing agitator is arranged along the axial direction of the mixing bin, and the output end of the high-speed drive motor is connected to the high-speed mixing agitator;

[0007] The high-speed mixer, the low-speed mixer and the screw feeder are distributed in sequence from top to bottom. The high-speed mixer and the low-speed mixer are distributed vertically, and the screw feeder is distributed horizontally.

[0008] Preferably, the storage bin and mixing bin are both hopper structures.

[0009] Preferably, the low-speed mixer comprises a stirring shaft, a stirring rod and a connecting spiral blade, wherein the stirring rod is connected to the upper and middle parts of the stirring shaft, and the connecting spiral blade is connected to the lower part of the stirring shaft, and the size of the connecting spiral blade is adapted to the inner diameter of the discharge port at the lower end of the storage bin.

[0010] Preferably, the high-speed mixer comprises a second stirring shaft, a second stirring rod, a shaftless variable diameter spiral blade and a second connecting shaft spiral blade, the second stirring rod is connected to the upper part of the second stirring shaft, the shaftless variable diameter spiral blade is connected to the upper part of the second stirring shaft, and the blade spirally extends downward to the middle part of the second stirring shaft, the tail end of the shaftless variable diameter spiral blade is connected to the second connecting shaft spiral blade, the second connecting shaft spiral blade is connected to the lower part of the second stirring shaft, and the size of the second connecting shaft spiral blade is adapted to the inner diameter of the discharge port at the lower end of the mixing bin.

[0011] The utility model has the following beneficial effects:

[0012] The utility model arranges a screw feeder, a low-speed mixer and a high-speed mixer in cooperation, utilizes the high-speed mixer to efficiently mix materials, fully and evenly mixes various materials through the high-speed mixer, and is not prone to bridging when the high-speed mixer rotates when the mixing is completed and the feeding is completed, thereby achieving continuous and stable feeding, and utilizes the low-speed mixer to evenly cool the high-mixed materials in a relatively short period of time, thereby avoiding overheating and decomposition of the materials, and at the same time, it can also discharge the residual gas in the high-mixed materials, and further even the materials, and is not prone to bridging when the low-mixing is completed and the feeding is completed, thereby achieving continuous and stable feeding, and in a process in which one is responsible for sufficient mixing and the other is responsible for even cooling, the materials are continuously and stably fed to the extruder through the screw feeder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the low-speed mixer and the high-speed mixer of the utility model.

[0015] In the figure: 1. extruder; 2. screw feeder; 3. low-speed mixer; 31. discharge valve 1; 32. storage bin; 33. low-speed mixer; 331. stirring shaft 1; 332. stirring rod 1; 333. connecting shaft spiral blade 1; 34. low-speed drive motor; 4. high-speed mixer; 41. discharge valve 2; 42. mixing bin; 43. high-speed mixer; 431. stirring shaft 2; 432. stirring rod 2; 433. shaftless variable diameter spiral blade; 434. connecting shaft spiral blade 2; 44. high-speed drive motor. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1-2 As shown, the utility model provides a technical solution: a uniform feeding mechanism for a screw extruder, comprising a screw feeder 2 connected to a feed port of an extruder 1, a low-speed mixer 3 connected to a feed port of the screw feeder 2, and a high-speed mixer 4 connected to a feed port of the low-speed mixer 3, wherein the high-speed mixer 4, the low-speed mixer 3 and the screw feeder 2 are sequentially distributed from top to bottom, the high-speed mixer 4 and the low-speed mixer 3 are vertically distributed, and the screw feeder 2 is horizontally distributed;

[0018] The low-speed mixer 3 includes a discharge valve 31, a storage bin 32, a low-speed mixer 33 and a low-speed drive motor 34. The discharge valve 31 is connected to the discharge port at the lower end of the storage bin 32. The storage bin 32 is a hopper structure. The low-speed mixer 33 is arranged along the axial direction of the storage bin 32. The output end of the low-speed drive motor 34 is connected to the low-speed mixer 33.

[0019] The high-speed mixer 4 includes a discharge valve 41, a mixing bin 42, a high-speed mixer 43 and a high-speed drive motor 44. The discharge valve 41 is connected to the discharge port at the lower end of the mixing bin 42. The mixing bin 42 is a hopper structure. The high-speed mixer 43 is arranged along the axial direction of the mixing bin 42. The output end of the high-speed drive motor 44 is connected to the high-speed mixer 43.

[0020] The low-speed mixing stirrer 33 includes a stirring shaft 331, a stirring rod 332 and a connecting spiral blade 333. The stirring rod 332 is connected to the upper and middle parts of the stirring shaft 331. The stirring rods 332 are evenly distributed around the stirring shaft 331, one up and one down, one left and one right, one front and one back, and are in contact with the inner wall of the storage bin 32. The connecting spiral blade 333 is connected to the lower part of the stirring shaft 331. The size of the connecting spiral blade 333 is adapted to the inner diameter of the discharge port at the lower end of the storage bin 32.

[0021] The high-speed mixing stirrer 43 includes a second mixing shaft 431, a second mixing rod 432, a shaftless variable diameter spiral blade 433 and a second connecting shaft spiral blade 434. The second mixing rod 432 is connected to the upper part of the second mixing shaft 431, and the second mixing rod 432 is in contact with the inner wall of the mixing bin 42. The shaftless variable diameter spiral blade 433 is connected to the upper part of the second mixing shaft 431, and the blade spirally extends downward to the middle part of the second mixing shaft 431. The tail end of the shaftless variable diameter spiral blade 433 is connected to the second connecting shaft spiral blade 434, and the second connecting shaft spiral blade 434 is connected to the lower part of the second mixing shaft 431. The size of the second connecting shaft spiral blade 434 is adapted to the inner diameter of the discharge port at the lower end of the mixing bin 42.

[0022] When in use, the screw feeder 2, the low-speed mixer 3 and the high-speed mixer 4 cooperate with each other, and the high-speed mixer 4 is used to efficiently mix the materials. The high-speed driving motor 44 is driven forward to drive the high-speed mixing agitator 43 to lift the materials upward. Under the stirring and lifting of the shaftless variable diameter spiral blade 433, the connecting shaft spiral blade 2 434 and the stirring rod 2 432, various materials are fully and evenly mixed. When the high-speed mixing and feeding are completed, the discharge valve 2 41 is opened, and the high-speed driving motor 44 is reversed to drive the high-speed mixing agitator 43 to push the materials downward. The high-speed mixing agitator 43 is not easy to produce bridging phenomenon when rotating, so continuous and stable material discharge is achieved. 4 drives the low-speed mixer 33 to rotate slowly and lift the material upward, so that the material after high mixing can be evenly cooled in a short time to avoid overheating and decomposition of the material. At the same time, it can also discharge the residual gas in the high-mixed material and further even the material. When the low-mixing is completed, the discharge valve 31 is opened, and the low-speed driving motor 34 is reversed to drive the low-speed mixer 33 to rotate and push the material downward. The low-speed mixer 33 is not easy to cause bridging phenomenon when it rotates, so continuous and stable material discharge is achieved. In the process of one being responsible for sufficient mixing and the other being responsible for uniform cooling, the material is continuously and stably sent to the extruder 1 through the screw feeder 2.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A uniform feeding mechanism for a screw extruder, characterized in that: It comprises a screw feeder (2) connected to the feed port of the extruder (1), a low-speed mixer (3) connected to the feed port of the screw feeder (2), and a high-speed mixer (4) connected to the feed port of the low-speed mixer (3); The low-speed mixer (3) comprises a discharge valve (31), a storage bin (32), a low-speed mixer (33) and a low-speed drive motor (34); the discharge valve (31) is connected to a discharge port at the lower end of the storage bin (32); the low-speed mixer (33) is arranged along the axial direction of the storage bin (32); and the output end of the low-speed drive motor (34) is connected to the low-speed mixer (33); The high-speed mixer (4) comprises a second discharge valve (41), a mixing bin (42), a high-speed mixer (43) and a high-speed drive motor (44); the second discharge valve (41) is connected to the discharge port at the lower end of the mixing bin (42); the high-speed mixer (43) is arranged along the axial direction of the mixing bin (42); and the output end of the high-speed drive motor (44) is connected to the high-speed mixer (43); The high-speed mixer (4), the low-speed mixer (3) and the screw feeder (2) are distributed in sequence from top to bottom; the high-speed mixer (4) and the low-speed mixer (3) are distributed vertically, and the screw feeder (2) is distributed horizontally.

2. A uniform feeding mechanism for a screw extruder according to claim 1, characterized in that: The material storage bin (32) and the material mixing bin (42) are both hopper structures.

3. A uniform feeding mechanism for a screw extruder according to claim 1, characterized in that: The low-speed mixing agitator (33) comprises a mixing shaft (331), a mixing rod (332) and a connecting shaft spiral blade (333), wherein the mixing rod (332) is connected to the upper and middle parts of the mixing shaft (331), and the connecting shaft spiral blade (333) is connected to the lower part of the mixing shaft (331), and the size of the connecting shaft spiral blade (333) is adapted to the inner diameter of the discharge port at the lower end of the storage bin (32).

4. A uniform feeding mechanism for a screw extruder according to claim 1, characterized in that: The high-speed mixing stirrer (43) comprises a second mixing shaft (431), a second mixing rod (432), a shaftless variable diameter spiral blade (433) and a second connecting shaft spiral blade (434), wherein the second mixing rod (432) is connected to the upper portion of the second mixing shaft (431), the shaftless variable diameter spiral blade (433) is connected to the upper portion of the second mixing shaft (431), and the blade spirally extends downward to the middle portion of the second mixing shaft (431), the tail end of the shaftless variable diameter spiral blade (433) is connected to the second connecting shaft spiral blade (434), and the second connecting shaft spiral blade (434) is connected to the lower portion of the second mixing shaft (431), and the size of the second connecting shaft spiral blade (434) is adapted to the inner diameter of the discharge port at the lower end of the mixing bin (42).

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