Feeding mechanism for double-screw extruder

Abstract

The utility model relates to the technical field of feeding mechanisms, and discloses a feeding mechanism for a double-screw extruder, which comprises a feeding barrel, and a double-screw extruder main body is arranged on the lower side of the feeding barrel; the top of the feeding barrel communicates with a feeding pipe, and a stirring assembly is arranged at the top of the feeding barrel. The stirring assembly comprises a motor, a second rotating shaft and a discharging mechanism, a third conical tooth is fixed to the output shaft end of the motor, the output shaft of the motor drives the third conical tooth to rotate, the third conical tooth is in meshed connection with a first conical tooth and a second conical tooth, and the first conical tooth and the second conical tooth drive the first rotating shaft and the second rotating shaft to rotate; the first stirring blade and the second stirring blade rotate in opposite directions, so that raw materials can be more effectively scattered and uniformly mixed, shear force and dispersion force are continuously applied to the raw materials, adhesion and accumulation of the raw materials are effectively prevented, the flowability and machinability of the raw materials are kept, and the downtime caused by non-uniformity or blockage of the raw materials is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding mechanisms, in particular to a feeding mechanism for a twin-screw extruder. Background Technique

[0002] The screw extruder relies on the pressure and shear force generated by the rotation of the screw, enabling the material to be fully plasticized and evenly mixed, and formed through the die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and rare multi-screw extruders and screwless extruders.

[0003] In the plastic processing industry, as a key device, the twin-screw extruder's raw material mixing uniformity and supply stability directly affect the product quality and production efficiency. Traditional feeding mechanisms often have problems such as uneven raw material mixing, easy adhesion and accumulation, and difficulty in accurately controlling the feeding amount. Therefore, a feeding mechanism for a twin-screw extruder is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a feeding mechanism for a twin-screw extruder to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A feeding mechanism for a twin-screw extruder includes a feeding barrel, and a twin-screw extruder main body is provided under the feeding barrel;

[0006] A feeding pipe is communicated with the top of the feeding barrel, and a stirring assembly is provided on the top of the feeding barrel;

[0007] The stirring assembly includes a motor, a second rotating shaft, and a feeding mechanism. A third conical tooth is fixed to the output shaft end of the motor, and a first conical tooth and a second conical tooth are respectively meshed and connected outside the third conical tooth;

[0008] A first sliding groove is opened inside the second rotating shaft, and a first rotating shaft is rotatably connected to the inner wall of the first sliding groove through a sealing bearing;

[0009] A plurality of second stirring blades are fixed to the outside of the first rotating shaft, and a plurality of first stirring blades are fixed to the outside of the second rotating shaft.

[0010] Preferably, the discharging end of the feeding barrel is communicated with the feeding end of the twin-screw extruder main body, and a protective box is fixed to the top of the feeding barrel and located outside the motor, the first conical tooth, the second conical tooth, and the third conical tooth.

[0011] Preferably, the center of the bottom of the first conical tooth is fixed to the center of the top of the first rotating shaft, the second conical tooth is fixedly sleeved on the outside of the second rotating shaft, and the second rotating shaft is rotatably connected to the center of the top of the feeding barrel through a sealing bearing.

[0012] Preferably, the blanking mechanism includes a limiting frame with a second chute formed inside it, and a baffle is rotatably connected to the inner side of the second chute.

[0013] Preferably, a plurality of second discharge holes are formed on the surface of the baffle, and a plurality of first discharge holes are formed on the inner wall of the second chute.

[0014] Preferably, the bottom of the first rotating shaft is fixed at the center of the top of the baffle, the outside of the limiting frame is fixed to the inner side wall of the feeding bucket, and the outside of the first rotating shaft is rotatably connected to one side of the limiting frame through a bearing.

[0015] Preferably, when the first discharge hole and the second discharge hole overlap, both sides of the limiting frame are in a communicating state, and when the first discharge hole and the second discharge hole do not overlap, both sides of the limiting frame are in a non-communicating state.

[0016] Compared with the prior art, the present utility model adopting the above technical solutions has the following technical effects:

[0017] 1. The output shaft of the motor drives the third conical gear to rotate. The third conical gear is meshed and connected with the first conical gear and the second conical gear respectively. The first conical gear and the second conical gear drive the first rotating shaft and the second rotating shaft to rotate respectively, so that the first stirring blade and the second stirring blade rotate in opposite directions, which can more effectively disperse and mix the raw materials evenly, continuously apply shear force and dispersion force to the raw materials, effectively prevent the adhesion and accumulation between the raw materials, maintain the fluidity and processability of the raw materials, and reduce the downtime caused by uneven raw materials or blockage.

[0018] 2. By controlling the rotation speed of the first rotating shaft and the overlap of the discharge holes on the baffle, the amount of raw materials entering the main body of the twin-screw extruder can be accurately controlled. The intermittent feeding method helps to maintain a stable pressure of the raw materials inside the main body of the twin-screw extruder, thereby optimizing the extrusion process and product quality.

[0019] 3. Using a single motor as the power source and realizing the distribution and transmission of power through bevel gears greatly simplifies the design of the mechanical structure, reduces the number and complexity of transmission components, makes the whole mechanism more compact, lightweight, and easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is the schematic structural diagram of the first perspective of the present utility model;

[0022] Figure 2 is the schematic structural diagram of the second perspective of the present utility model;

[0023] Figure 3 is the schematic structural diagram of the feeding pipe of the present utility model;

[0024] Figure 4 is the schematic front sectional structural diagram of the feeding barrel of the present utility model;

[0025] Figure 5 is the schematic structural diagram of the discharge hole distribution of the present utility model.

[0026] Explanation of reference numerals: 1. Feeding barrel; 2. Feeding pipe; 3. Stirring assembly; 31. Motor; 32. First bevel gear; 33. First rotating shaft; 34. Second bevel gear; 35. First chute; 36. First stirring blade; 37. Second stirring blade; 38. First discharge hole; 39. Second discharge hole; 310. Baffle; 311. Second chute; 312. Limiting frame; 313. Second rotating shaft; 314. Third bevel gear; 4. Twin-screw extruder main body; 5. Protection box. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions that can be implemented in this application. Therefore, they do not have a technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by this application and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in this application.

[0029] Embodiment

[0030] Please refer to Figures 1-5, the utility model provides a technical solution: a feeding mechanism for a twin-screw extruder, including a feeding barrel 1, and a twin-screw extruder main body 4 is arranged below the feeding barrel 1; a feeding pipe 2 is communicated with the top of the feeding barrel 1, a stirring assembly 3 is arranged at the top of the feeding barrel 1, a switch for controlling the motor 31 is installed on one side of the feeding barrel 1, the discharging end of the feeding barrel 1 is communicated with the feeding end of the twin-screw extruder main body 4, and a protective box 5 is fixed at the top of the feeding barrel 1 and located outside the motor 31, the first conical gear 32, the second conical gear 34 and the third conical gear 314;

[0031] The stirring assembly 3 includes a motor 31, a second rotating shaft 313 and a feeding mechanism. A third conical gear 314 is fixed at the output shaft end of the motor 31, and a first conical gear 32 and a second conical gear 34 are respectively meshed and connected outside the third conical gear 314; the third conical gear 314 is respectively meshed and connected with the first conical gear 32 and the second conical gear 34, so that the rotation directions of the first conical gear 32 and the second conical gear 34 are opposite. A first chute 35 is opened inside the second rotating shaft 313, and a first rotating shaft 33 is rotatably connected to the inner wall of the first chute 35 through a sealed bearing;

[0032] A plurality of second stirring blades 37 are fixed outside the first rotating shaft 33, and a plurality of first stirring blades 36 are fixed outside the second rotating shaft 313. The first conical gear 32 drives the first rotating shaft 33 and the second stirring blades 37 to rotate clockwise, and the second conical gear 34 drives the second rotating shaft 313 and the first stirring blades 36 to rotate. At this time, the first stirring blades 36 and the second stirring blades 37 rotate in opposite directions;

[0033] The center of the bottom of the first conical gear 32 is fixed at the center of the top of the first rotating shaft 33, the outside of the second conical gear 34 is fixedly sleeved on the outside of the second rotating shaft 313, the outside of the second rotating shaft 313 is rotatably connected to the center of the top of the feeding barrel 1 through a sealed bearing. The first stirring blades 36 and the second stirring blades 37 rotate in opposite directions, which can more effectively disperse and mix the raw materials evenly, continuously apply shear force and dispersion force to the raw materials, and effectively prevent the adhesion and accumulation between the raw materials.

[0034] In order to facilitate the control of the addition of raw material quantity, a blanking mechanism is provided. The blanking mechanism includes a limiting frame 312. A second chute 311 is formed inside the limiting frame 312. A baffle 310 is rotatably connected to the inner side of the second chute 311. A plurality of second discharge holes 39 are formed on the surface of the baffle 310. A plurality of first discharge holes 38 are formed on the inner wall of the second chute 311. The bottom of the first rotating shaft 33 is fixed at the center of the top of the baffle 310. The outside of the limiting frame 312 is fixed to the inner side wall of the feeding barrel 1. The outside of the first rotating shaft 33 is rotatably connected to one side of the limiting frame 312 through a bearing. When the first discharge hole 38 and the second discharge hole 39 overlap, both sides of the limiting frame 312 are in a communicating state. When the first discharge hole 38 and the second discharge hole 39 do not overlap, both sides of the limiting frame 312 are in a non-communicating state. When the second discharge holes 39 on one side of the baffle 310 rotate inside the second chute 311, when the first discharge hole 38 and the second discharge hole 39 overlap, the raw material enters the internal of the twin-screw extruder main body 4 through the first discharge hole 38 and the second discharge hole 39.

[0035] Working principle: When the twin-screw extruder main body 4 is working, the raw material is added into the inner side of the feeding pipe 2. At the same time, the raw material enters the internal of the feeding barrel 1 under the guiding of the feeding pipe 2. Press the switch to control the motor 31 to start working. The output shaft of the motor 31 drives the third conical gear 314 to rotate. The third conical gear 314 is respectively meshed and connected with the first conical gear 32 and the second conical gear 34, so that the rotation directions of the first conical gear 32 and the second conical gear 34 are opposite. At this time, the first conical gear 32 drives the first rotating shaft 33 and the second stirring blade 37 to rotate clockwise. The second conical gear 34 drives the second rotating shaft 313 and the first stirring blade 36 to rotate. At this time, the first stirring blade 36 and the second stirring blade 37 rotate in opposite directions to disperse the raw material inside the feeding barrel 1, avoiding the raw material from sticking and piling up together. The first stirring blade 36 and the second stirring blade 37 rotate in opposite directions, which can more effectively disperse and mix the raw material evenly, continuously apply shear force and dispersion force to the raw material, effectively prevent the adhesion and piling up between the raw materials, maintain the fluidity and processability of the raw material, and reduce the downtime caused by uneven raw material or blockage.

[0036] At the same time, when the first rotating shaft 33 rotates, the first rotating shaft 33 drives the baffle 310 to rotate at this time. When the second discharge holes 39 on one side of the baffle 310 rotate inside the second chute 311, when the first discharge hole 38 and the second discharge hole 39 overlap, the raw material enters the internal of the twin-screw extruder main body 4 through the first discharge hole 38 and the second discharge hole 39, intermittently feeding the twin-screw extruder main body 4. By controlling the rotation speed of the first rotating shaft 33 and the overlap of the discharge holes on the baffle 310, the raw material quantity entering the twin-screw extruder main body 4 can be accurately controlled. The intermittent feeding method helps to maintain the stable pressure of the raw material inside the twin-screw extruder main body 4, thereby optimizing the extrusion process and product quality.

[0037] The power of a motor 31 is used in cooperation with a first bevel gear 32, a second bevel gear 34 and a third bevel gear 314 to respectively provide the power for the rotation of a first stirring blade 36, a second stirring blade 37 and a baffle 310. A single motor 31 is used as the power source, and the power distribution and transmission are achieved through bevel gears, which greatly simplifies the design of the mechanical structure, reduces the number and complexity of transmission components, makes the whole mechanism more compact, lightweight, and easy to install and maintain.

[0038] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present invention can be combined or / and combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A feeding mechanism for a twin-screw extruder, comprising a feeding barrel (1), characterized in that: A twin-screw extruder main body (4) is provided below the feeding bucket (1); A feeding pipe (2) is connected to the top of the feeding bucket (1), and a stirring assembly (3) is provided on the top of the feeding bucket (1); The stirring assembly (3) includes a motor (31), a second rotating shaft (313) and a blanking mechanism. A third conical gear (314) is fixed to the output shaft end of the motor (31), and a first conical gear (32) and a second conical gear (34) are respectively meshed and connected to the outside of the third conical gear (314); A first chute (35) is formed inside the second rotating shaft (313), and a first rotating shaft (33) is rotatably connected to the inner wall of the first chute (35) through a sealed bearing; A plurality of second stirring blades (37) are fixed to the outside of the first rotating shaft (33), and a plurality of first stirring blades (36) are fixed to the outside of the second rotating shaft (313).

2. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: The discharging end of the feeding bucket (1) is communicated with the feeding end of the twin-screw extruder main body (4), and a protective box (5) located outside the motor (31), the first conical gear (32), the second conical gear (34) and the third conical gear (314) is fixed to the top of the feeding bucket (1).

3. The feeding mechanism for a twin-screw extruder according to claim 1, characterized in that: The center of the bottom of the first conical gear (32) is fixed to the center of the top of the first rotating shaft (33), the outside of the second conical gear (34) is fixedly sleeved on the outside of the second rotating shaft (313), and the outside of the second rotating shaft (313) is rotatably connected to the center of the top of the feeding bucket (1) through a sealed bearing.

4. The feeding mechanism for a twin-screw extruder according to claim 1, wherein: The blanking mechanism includes a limiting frame (312), a second chute (311) is formed inside the limiting frame (312), and a baffle (310) is rotatably connected to the inside of the second chute (311).

5. The feeding mechanism for a twin-screw extruder according to claim 4, characterized in that: A plurality of second discharging holes (39) are formed on the surface of the baffle (310), and a plurality of first discharging holes (38) are formed on the inner wall of the second chute (311).

6. The feeding mechanism for a twin-screw extruder according to claim 5, characterized in that: The bottom of the first rotating shaft (33) is fixed to the center of the top of the baffle (310), the outside of the limiting frame (312) is fixed to the inner side wall of the feeding bucket (1), and the outside of the first rotating shaft (33) is rotatably connected to one side of the limiting frame (312) through a bearing.

7. The feeding mechanism for a twin-screw extruder according to claim 6, characterized in that: When the first discharging hole (38) and the second discharging hole (39) overlap, the two sides of the limiting frame (312) are in a communicating state, and when the first discharging hole (38) and the second discharging hole (39) do not overlap, the two sides of the limiting frame (312) are in a non-communicating state.

Images