Double-screw extruder for processing modified nylon slices

Abstract

The utility model relates to the technical field of modified nylon slice processing, and discloses a double-screw extruder for modified nylon slice processing, which comprises a shell, two screws are rotatably mounted on the inner side wall of the shell, second spiral blades are fixedly mounted on the outer surfaces of the two screws, one ends of the two screws extend to the outer end of the shell, and the other ends of the two screws extend to the outer end of the shell. A first rotating part is arranged at one end of the shell, a feeding pipe is fixedly installed at the upper end of the shell, a pretreatment barrel is fixedly installed at the upper end of the feeding pipe, a rotating rod is rotatably installed at the upper end of the pretreatment barrel, and a pretreatment motor is fixedly installed at the upper end of the rotating rod. The device has the technical effects that modified nylon slice agglomerates formed by factors such as electrostatic adsorption and damp can be forcibly scattered, and originally tightly combined particle groups are decomposed into single or smaller particle sets, so that the specific surface area of materials is greatly increased, and favorable conditions are created for subsequent dispersion and plasticization in an extruder.

Description

Technical Field

[0001] This utility model relates to the field of modified nylon chip processing technology, specifically a twin-screw extruder for modified nylon chip processing. Background Technology

[0002] In the modified nylon chip processing industry, as the market demands increasingly higher performance from modified nylon products, higher standards are being set for the precision of the processing. As a key processing piece of equipment, the stability of the twin-screw extruder's operation and the consistency of its product quality are of paramount importance.

[0003] Currently, however, traditional twin-screw extruders have some inherent problems in the feeding process, which affect the overall processing effect. For example, modified nylon is prone to particle agglomeration during storage and transportation due to electrostatic adsorption, moisture, and other reasons. After these agglomerates enter the extruder, they are difficult to disperse and plasticize fully in a short time, resulting in defects such as uneven local performance of the product, such as decreased mechanical properties and appearance defects. Therefore, we propose a new type of twin-screw extruder for processing modified nylon chips. Utility Model Content

[0004] This utility model provides the following technical solution: a twin-screw extruder for processing modified nylon chips, comprising a shell, two screws rotatably mounted on the inner sidewall of the shell, helical blades fixedly mounted on the outer surface of each screw, one end of each screw extending to the outer end of the shell, a rotating component at one end of the shell, a feed pipe fixedly mounted on the upper end of the shell, a pretreatment cylinder fixedly mounted on the upper end of the feed pipe, a rotating rod rotatably mounted on the upper end of the pretreatment cylinder, a pretreatment motor fixedly mounted on the upper end of the rotating rod, the bottom end of the rotating rod extending into the interior of the feed pipe, a screen plate fixedly mounted on the inner sidewall of the pretreatment cylinder, multiple pressing rollers provided on the upper end of the screen plate, a rotating shaft fixedly mounted on the opposite end of each of the multiple pressing rollers, the rotating shaft rotatably mounted on the outer surface of the rotating rod, a rotating component on the rotating rod, and a through-feed inlet at the upper end of the pretreatment cylinder.

[0005] Preferably, the rotating component includes two gears, which are respectively fixedly mounted on the outer surfaces of the two screws, and an extrusion motor is fixedly mounted on one end of one of the screws.

[0006] Preferably, the rotating component 2 includes multiple connecting rods, which are fixedly installed at the bottom of the inner part of the housing. A mounting cylinder is fixedly installed at the bottom of the multiple connecting rods. The mounting cylinder is sleeved on the outer surface of the rotating rod. An annular toothed plate is fixedly installed at the bottom of the mounting cylinder. The annular toothed plate is meshed with multiple gears 2, which are respectively installed on the outer surface of multiple rotating shafts.

[0007] Preferably, multiple crushing cones are fixedly installed on the outer surface of each crushing roller, and the cross-sections of the multiple crushing cones are all cone-shaped.

[0008] Preferably, the feed pipe is provided with a spiral blade, the spiral blade is fixedly installed on the outer surface of the rotating rod, and a stirring shaft is fixedly installed on the outer surface of the rotating rod.

[0009] Preferably, a motor plate one is fixedly installed on the upper end of the pretreatment motor, the motor plate one is fixedly installed on the upper end of the pretreatment cylinder, and a motor plate two is fixedly installed on the side end of the extrusion motor, the motor plate two is fixedly installed on the side end of the outer shell.

[0010] Preferably, a guide platform is fixedly installed at the bottom of the inner side of the outer casing, and the interior is inclined.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention utilizes a crushing structure to forcibly break up modified nylon chip agglomerates formed by electrostatic adsorption, moisture, and other factors. The originally tightly bound particle clusters are decomposed into individual or smaller particle aggregates, greatly increasing the specific surface area of ​​the material. This creates favorable conditions for subsequent dispersion and plasticization in the extruder. The pretreatment of the material ensures that it enters the extruder in a relatively uniform state, avoiding the problem of uneven material filling in the extruder caused by fluctuations in the feed rate, and maintaining the stability of screw torque and speed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the component structure of this utility model;

[0016] Figure 4 This is an enlarged structural diagram of point A of this utility model.

[0017] In the diagram: 1. Outer shell; 2. Pretreatment cylinder; 3. Feed pipe; 4. Feed inlet; 5. Pretreatment motor; 6. Motor plate one; 7. Motor plate two; 8. Extrusion motor; 9. Screw; 10. Gear one; 11. Rotating rod; 12. Spiral blade one; 13. Mesh plate; 14. Compressing roller; 15. Crushing cone; 16. Connecting rod; 17. Mounting cylinder; 18. Gear two; 19. Annular toothed plate; 20. Rotating shaft; 21. Stirring shaft; 22. Spiral blade two; 23. Guide table.

[0018] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0019] 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.

[0020] like Figure 1-4 As shown, this utility model provides a technical solution: a twin-screw extruder for processing modified nylon chips, including a shell 1. Two screws 9 are rotatably installed on the inner side wall of the shell 1. Helical blades 22 are fixedly installed on the outer surface of both screws 9. One end of each screw 9 extends to the outer end of the shell 1. A rotating component is provided at one end of the shell 1. A feed pipe 3 is fixedly installed at the upper end of the shell 1. A pretreatment cylinder 2 is fixedly installed at the upper end of the feed pipe 3. A rotating rod 11 is rotatably installed at the upper end of the pretreatment cylinder 2. A pretreatment motor 5 is fixedly installed at the upper end of the rotating rod 11. The bottom end of the rotating rod 11 extends into the interior of the feed pipe 3. A screen plate 13 is fixedly installed on the inner side wall of the pretreatment cylinder 2. Multiple pressing rollers 14 are provided at the upper end of the screen plate 13. A rotating shaft 20 is fixedly installed at the opposite end of each of the multiple pressing rollers 14. The rotating shaft 20 is rotatably installed on the outer surface of the rotating rod 11. A rotating component 2 is provided on the rotating rod 11. A through-feed port 4 is opened at the upper end of the pretreatment cylinder 2.

[0021] In an optional embodiment: the rotating component includes two gears 10, which are respectively fixedly mounted on the outer surfaces of two screws 9, and an extrusion motor 8 is fixedly mounted on one end of one of the screws 9.

[0022] It should be noted that the extrusion motor 8 provides power, which is then transmitted to the two screws through two gears 10, causing them to rotate in a predetermined direction and speed.

[0023] In an optional embodiment: the rotating component 2 includes a plurality of connecting rods 16, which are fixedly installed at the bottom of the inner part of the housing 1. The bottom of the plurality of connecting rods 16 is fixedly installed with a mounting cylinder 17, which is sleeved on the outer surface of the rotating rod 11. The bottom of the mounting cylinder 17 is fixedly installed with an annular toothed plate 19, which is meshed with a plurality of gears 2 18. The plurality of gears 2 18 are respectively installed on the outer surface of a plurality of rotating shafts 20.

[0024] It should be noted that when the rotating rod 11 rotates, it also causes the rotating shaft 20 and the pressing roller 14 mounted on it to rotate. When the rotating shaft 20 rotates, it causes the gear 18 mounted on it to rotate around the rotating rod 11. Since the gear 18 meshes with the annular toothed plate 19, the rotating shaft 20 will also rotate. Thus, the pressing roller 14 rotates under the action of the rotating rod 11 and also rotates around the rotating shaft 20.

[0025] In an optional embodiment: a plurality of crushing cones 15 are fixedly installed on the outer surface of the crushing roller 14, and the cross-section of the plurality of crushing cones 15 is tapered.

[0026] It should be noted that the setting of the crushing cone 15 improves the crushing effect of the crushing roller 14 on crushing the clumps of modified nylon.

[0027] In an optional embodiment: the feed pipe 3 is provided with a spiral blade 12 inside, the spiral blade 12 is fixedly installed on the outer surface of the rotating rod 11, and the stirring shaft 21 is fixedly installed on the outer surface of the rotating rod 11.

[0028] It should be noted that when material discharge is required, the pretreatment motor 5 is controlled to rotate in reverse. The reverse-rotating spiral blade 12 can transport the material into the outer shell 1, and the stirring shaft 21 can continue to mix the material entering the pretreatment cylinder 2, thereby improving the mixing effect between the materials.

[0029] In an optional embodiment: a motor plate 6 is fixedly installed on the upper end of the pretreatment motor 5, and the motor plate 6 is fixedly installed on the upper end of the pretreatment cylinder 2; a motor plate 7 is fixedly installed on the side end of the extrusion motor 8, and the motor plate 7 is fixedly installed on the side end of the outer casing 1.

[0030] It should be noted that the motor will be installed at the location where it needs to be fixed via the motor board.

[0031] In an optional embodiment: a guide platform 23 is fixedly installed at the bottom of the inner side of the housing 1, and the interior is inclined.

[0032] It should be noted that the stirred nylon flows towards the upper end of the feed pipe 3 under the guidance of the inclined wall.

[0033] In practical use, the working principle of this utility model is as follows:

[0034] First, modified nylon is gradually poured into the pretreatment cylinder 2 through the feed inlet 4. Nylon without particle agglomeration passes through the mesh plate 13, while nylon with particle agglomeration remains at the upper end of the mesh plate 13. At this time, the pretreatment motor 5 is started, and the output end of the pretreatment motor 5 rotates, causing the rotating rod 11 to rotate as well. When the rotating rod 11 rotates, it also drives the rotating shaft 20 and the pressing roller 14 mounted on it to rotate. When the rotating shaft 20 rotates, it drives the gear 18 mounted on it to rotate around the rotating rod 11. Since the gear 18 meshes with the annular toothed plate 19, the rotating shaft 20 will also rotate on its own axis. Thus, the pressing roller 14 rotates under the action of the rotating rod 11 and also rotates around the rotating shaft 20. The crushing roller 14 can crush the agglomerated nylon particles. While the rotating rod 11 rotates, it also drives the stirring shaft 21 to rotate. The stirring shaft 21 can mix the nylon with the other additives. At this time, the spiral blade 12 rotates in the forward direction to ensure that the material does not enter the feed pipe 3. When it is necessary to discharge the material, the pretreatment motor 5 is controlled to rotate in the reverse direction. The spiral blade 12 rotating in the reverse direction can transport the material into the outer shell 1. The extrusion motor 8 is started. The output end of the extrusion motor 8 rotates, which drives the opposite screw 9 to rotate. Under the action of two meshing gears 10, the other screw 9 will also rotate. Through the propulsive action of the spiral blade 22 installed on the screw 9, the material is pushed forward into the plasticizing section and finally extruded.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A twin-screw extruder for processing modified nylon chips, comprising a housing (1), characterized in that: Two screws (9) are rotatably mounted on the inner sidewall of the outer shell (1). Helical blades (22) are fixedly mounted on the outer surfaces of both screws (9). One end of each screw (9) extends to the outer end of the outer shell (1). A rotating component is provided at one end of the outer shell (1). A feed pipe (3) is fixedly mounted on the upper end of the outer shell (1). A pretreatment cylinder (2) is fixedly mounted on the upper end of the feed pipe (3). A rotating rod (11) is rotatably mounted on the upper end of the pretreatment cylinder (2). A pretreatment component is fixedly mounted on the upper end of the rotating rod (11). The processing motor (5) has a bottom end of the rotating rod (11) extending into the inside of the feed pipe (3). A mesh plate (13) is fixedly installed on the inner side wall of the pretreatment cylinder (2). Multiple rolling rollers (14) are provided at the upper end of the mesh plate (13). A rotating shaft (20) is fixedly installed at the opposite end of each of the multiple rolling rollers (14). The rotating shaft (20) is rotatably installed on the outer surface of the rotating rod (11). A rotating part 2 is provided on the rotating rod (11). A feed port (4) is provided at the upper end of the pretreatment cylinder (2) in a through-type configuration.

2. The twin-screw extruder for processing modified nylon chips according to claim 1, characterized in that: The rotating component includes two gears (10), which are fixedly mounted on the outer surfaces of the two screws (9), and an extrusion motor (8) is fixedly mounted on one end of one of the screws (9).

3. The twin-screw extruder for processing modified nylon chips according to claim 1, characterized in that: The rotating component 2 includes multiple connecting rods (16), which are fixedly installed at the bottom of the inner part of the outer shell (1). The bottom of the multiple connecting rods (16) is fixedly installed with a mounting cylinder (17), which is sleeved on the outer surface of the rotating rod (11). The bottom of the mounting cylinder (17) is fixedly installed with an annular toothed plate (19), which is meshed with multiple gears 2 (18). The multiple gears 2 (18) are respectively installed on the outer surface of multiple rotating shafts (20).

4. The twin-screw extruder for processing modified nylon chips according to claim 1, characterized in that: Multiple crushing cones (15) are fixedly installed on the outer surface of each crushing roller (14), and the cross-sections of the multiple crushing cones (15) are all cone-shaped.

5. A twin-screw extruder for processing modified nylon chips according to claim 1, characterized in that: The feed pipe (3) is provided with a spiral blade (12) inside. The spiral blade (12) is fixedly installed on the outer surface of the rotating rod (11). The outer surface of the rotating rod (11) is fixedly installed with a stirring shaft (21).

6. A twin-screw extruder for processing modified nylon chips according to claim 2, characterized in that: A motor plate (6) is fixedly installed on the upper end of the pretreatment motor (5), and the motor plate (6) is fixedly installed on the upper end of the pretreatment cylinder (2). A motor plate (7) is fixedly installed on the side end of the extrusion motor (8), and the motor plate (7) is fixedly installed on the side end of the outer shell (1).

7. The twin-screw extruder for processing modified nylon chips according to claim 1, characterized in that: A guide platform (23) is fixedly installed at the bottom of the inner side of the outer shell (1), and the inner side is inclined.

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