Double-screw structure of pre-dispersed masterbatch particle extruder

Abstract

The utility model relates to a double-screw structure of a pre-dispersed master colloidal particle extruder, and aims to solve the problems that the conventional screw is inconvenient to disassemble, and the two screws are possibly abraded and collided due to mutual collision caused by shaking when the screw is directly disassembled. The device comprises a supporting plate, a rotating shaft, an extrusion barrel and a driving gear, an outer frame is fixedly connected to the surface of the supporting plate, the extrusion barrel is movably connected to the inner side of the outer frame in an inserted mode, and inserting grooves are formed in the centers of the left end and the right end of the supporting plate; an insertion plate is transversely and slidably connected to the inner side of the insertion groove, a rotating shaft is rotatably connected to the surface of the side, facing the outer frame, of the insertion plate, a limiting plate is fixedly connected to the outer side wall of the rotating shaft, and threaded cylinders movably sleeve the outer side walls of the rotating shaft and the limiting plate; the connecting structure has the characteristics of simple structure, convenience in disassembly and capability of ensuring that the connection stability is not influenced by repeated disassembly.

Description

Technical Field

[0001] The utility model relates to the technical field of twin-screw extruders, in particular to a twin-screw structure of a pre-dispersed masterbatch extruder. Background Art

[0002] Pre-dispersed masterbatch is a special rubber additive. It is a granular product made by pre-dispersing vulcanizers, accelerators or other functional additives with rubber carriers (such as natural rubber, synthetic rubber or their processing by-products) through processes such as mixing. This product has many advantages, such as easy use, uniform dispersion, improved processing performance, and increased vulcanization efficiency. An extruder is required in the production process. Currently, single-screw extruders are the most widely used, while twin-screw extruders have more significant mixing capabilities and can accurately adjust the degree of shear / mixing, thereby providing better mixing intensity and mixing quality. Twin-screw extruders have better self-cleaning performance and can reduce the occurrence of material stagnation.

[0003] The two screws of some twin-screw extruders are usually designed to be tightly meshed and rotate in opposite directions. This design makes the gap between the screws very small, thereby achieving a positive conveying characteristic. In the meshing area, the spiral ridges of one screw are tightly matched with the spiral grooves of the other screw, forming a state similar to gear meshing. This tightly meshing design helps to fully mix and melt the materials, improve the production efficiency and product quality of the extruder, but it is inconvenient to disassemble. Directly disassembling the screws may cause the two screws to collide with each other due to shaking, resulting in wear and bumps. In addition, the two screws are more troublesome to disassemble, and there are many screws. Multiple disassembly may affect the stability of the connection with the transmission structure. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology, adapt to actual needs, and provide a twin-screw structure of a pre-dispersed masterbatch extruder to solve the technical problem that the current screw is inconvenient to disassemble. Direct disassembly of the screw may cause the two screws to collide with each other due to shaking, resulting in wear and bumping. In addition, the two screws are also more troublesome to disassemble. There are many screws, and multiple disassembly may affect the stability of the connection between the transmission structure.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is as follows: a twin-screw structure of a pre-dispersed masterbatch extruder is designed, including a support plate, a rotating shaft, an extrusion barrel and a driving gear, the surface of the support plate is fixedly connected to an outer frame, the inner side of the outer frame is movably connected to the extrusion barrel, slots are provided in the center of the left and right ends of the support plate, the inner side of the slot is laterally slidably connected to an insert plate, the insert plate is rotatably connected to the surface of the outer frame side, the outer side wall of the rotating shaft is fixedly connected to a limiting plate, and the outer side walls of the rotating shaft and the limiting plate are movably sleeved with a threaded barrel, the upper and lower surfaces of the threaded barrel close to the support plate are threadedly connected to a limiting bolt, one end of the limiting bolt passes through the outer surface of the threaded barrel and is threadedly connected to the surface of the limiting plate.

[0006] Preferably, a driven gear is rotatably connected to the surface of the inserting plate on the opposite side of the rotating shaft, and the driven gear is rotatably connected to the rotating shaft and fixedly connected to one end of the inserting plate surface.

[0007] Preferably, a driving gear is rotatably connected to the lower position of the support plate surface on the opposite side of the outer frame, and a sub-gear is rotatably connected to the support plate surface on one side of the driving gear. The driving gear is engaged with the driven gear and the sub-gear on one side, and the sub-gear is engaged with the driven gear on the other side, and the center of the outer surface of the driving gear is fixedly connected to the output end of the matching motor transmission shaft.

[0008] Preferably, an inserting hole is formed on the inner side wall of the slot, and an inserting block is fixedly connected to the outer surface of the inserting plate at a horizontal position of the inserting hole.

[0009] Preferably, a sub-frame is fixedly connected to the surface of the plugging plate on the side of the rotating shaft away from the center of the support plate, and the upper and lower ends of the sub-frame are respectively fitted with the upper and lower surfaces of the outer frame.

[0010] Preferably, the upper and lower outer surfaces of the outer frame are both threadedly connected with fixing bolts, the fixing bolts pass through the surface of the outer frame and are threadedly connected to the extrusion barrel, and the upper and lower surfaces of the extrusion barrel are respectively provided with a feed port and a discharge port.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model can move the rotating shaft horizontally through the slot and the insert plate. The bolts at the insert plate opening are also removed. At this time, the insert plate is pulled toward the outside of the slot to make the rotating shaft and the threaded barrel aligned with the center of the support plate, thereby increasing the distance between the threaded barrels on the left and right sides, avoiding damage caused by collision during disassembly. The operation is simple and fast, thereby improving the efficiency of disassembly.

[0013] 2. The utility model can avoid affecting the transmission structure through the rotating shaft, the limiting plate, the threaded barrel and the limiting bolt. When disassembling, it is only necessary to twist off the limiting bolt, and the old threaded barrel can be directly slid out from the surface of the rotating shaft and the limiting plate, and then the new threaded barrel can be slid in and fixed without disassembling the rotating shaft, thereby avoiding the influence of multiple disassembly and the connection stability between the driven gear, and the disassembly is convenient, thereby improving the stability and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic structural diagram of one side of the threaded barrel of the utility model;

[0016] Figure 3 This is a schematic structural diagram of one side of the driving gear of the utility model;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] In the figure: 1. Support plate; 2. Outer frame; 201. Fixing bolt; 3. Extruder; 301. Feed port; 302. Discharge port; 4. Slot; 5. Insert plate; 501. Insert block; 502. Socket; 503. Sub-frame; 6. Rotating shaft; 7. Limit plate; 8. Threaded barrel; 801. Limiting bolt; 9. Driven gear; 10. Driving gear; 1001. Motor; 1002. Sub-gear. DETAILED DESCRIPTION

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0020] Example 1: A twin-screw structure of a pre-dispersed masterbatch extruder, see Figures 1 to 4, including a support plate 1, a rotating shaft 6, an extrusion cylinder 3 and a driving gear 10. The surface of the support plate 1 is fixedly connected to the outer frame 2, and the extrusion cylinder 3 is movably inserted into the inner side of the outer frame 2. Slots 4 are provided in the center of the left and right ends of the support plate 1. The inner side of the slot 4 is laterally slidably connected to the plug plate 5. The plug plate 5 is rotated toward the surface of one side of the outer frame 2 and is connected to the rotating shaft 6. The outer wall of the rotating shaft 6 is fixedly connected to the limiting plate 7. Pull the plug plate 5 toward the outside of the slot 4 so that the rotating shaft 6 and the threaded cylinder 8 are aligned with the center of the support plate 1, thereby increasing the distance between the threaded cylinders 8 on the left and right sides, avoiding disassembly. The cam 8 is screwed onto the cam 8 and the cam 8 is screwed onto the cam 8. The cam 8 is screwed onto the cam 8 and the cam 8 is screwed onto the cam 8. The cam 8 is screwed onto the cam 8 and the cam 8 is screwed onto the cam 8.

[0021] For details, see Figure 3 The surface of the insert plate 5 on the opposite side of the rotating shaft 6 is rotatably connected to a driven gear 9, and the driven gear 9 is fixedly connected to one end of the rotating shaft 6 on the surface of the insert plate 5. During the rotation process, the driven gear 9 will drive the rotating shaft 6 to rotate synchronously, so that the threads on the surface of the threaded barrel 8 process the material.

[0022] For further information, see Figure 3 , the surface of the support plate 1 on the opposite side of the outer frame 2 is rotatably connected to a driving gear 10, and the surface of the support plate 1 on one side of the driving gear 10 is rotatably connected to a sub-gear 1002, the driving gear 10 is engaged with the driven gear 9 and the sub-gear 1002 on one side, the sub-gear 1002 is engaged with the driven gear 9 on the other side, and the center of the outer surface of the driving gear 10 is fixedly connected to the output end of the transmission shaft of the matching motor 1001. The motor 1001 can be installed in a suitable position and drive the driving gear 10 to rotate after starting. The driving gear 10 then drives the driven gear 9 to rotate, thereby rotating the threaded barrel 8. The purpose of the sub-gear 1002 here is mainly to make the two rotating shafts 6 rotate in opposite directions, so that the threaded barrel 8 rotates in different directions to achieve positive conveying characteristics, and the sub-gear 1002 and the driven gear 9 are of the same size, thereby ensuring consistent speed.

[0023] It is worth noting that, see Figure 2 and Figure 4 The inner wall of the slot 4 is provided with a socket 502, and the outer surface of the plugboard 5 at the horizontal position of the socket 502 is fixedly connected with an insert block 501, which can be inserted into the socket 502 to further ensure the stability of the plugboard 5.

[0024] It is worth noting that see Figure 1 The upper and lower outer surfaces of the outer frame 2 are both threadedly connected with fixing bolts 201. The fixing bolts 201 penetrate the surface of the outer frame 2 and are threadedly connected to the extrusion barrel 3. The upper and lower surfaces of the extrusion barrel 3 are respectively provided with a feed port 301 and a discharge port 302. The fixing threads cooperate with the outer frame 2 to fix the extrusion barrel 3 so that it cannot be separated from the outer frame 2.

[0025] It is worth mentioning that see Figure 2 The sub-frame 503 is fixedly connected to the surface of the plugboard 5 on the side of the rotating shaft 6 away from the center of the support plate 1, and the upper and lower ends of the sub-frame 503 are respectively in contact with the surfaces of the outer frame 2 on the upper and lower sides. The sub-frame 503 is mainly to facilitate the plugboard 5 to not be blocked by the outer frame 2 during the lateral movement. Therefore, a section of the outer frame 2 at the position of the plugboard 5 is set as the sub-frame 503 to ensure the normal movement of the plugboard 5.

[0026] Working principle: When disassembly is required, first remove the fixing bolt 201, and then pull out the extrusion cylinder 3. At this time, the rotating shaft 6 can be moved horizontally through the slot 4 and the insert plate 5, and the bolts at the opening of the insert plate 5 are also removed. At this time, the insert plate 5 is pulled toward the outside of the slot 4, so that the rotating shaft 6 and the threaded cylinder 8 are in the center of the supporting plate 1, thereby increasing the distance between the threaded cylinders 8 on the left and right sides, avoiding damage caused by mutual collision during disassembly, and the operation is simple and fast, which improves the efficiency of disassembly. At the same time, the rotating shaft 6, the limit plate 7, the threaded cylinder 8 and the limit bolt 801 can be used to avoid affecting the transmission structure. During disassembly, you only need to twist off the limit bolt 801, and you can directly slide the old threaded cylinder 8 out of the surface of the rotating shaft 6 and the limit plate 7, and then slide the new threaded cylinder 8 in and fix it. There is no need to disassemble the rotating shaft 6, thereby avoiding the impact of multiple disassembly and the stable connection between the driven gear 9, and the disassembly is convenient, which improves the stability and practicality of the device.

[0027] In addition, the components designed in this utility model are all universal standard parts or components known to technical personnel in this field. Their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. They can be fully implemented by technical personnel in this field. Needless to say, the content protected by this utility model does not involve improvements to internal structures and methods.

[0028] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A twin-screw structure of a pre-dispersed masterbatch extruder, comprising a support plate (1), a rotating shaft (6), an extrusion barrel (3) and a driving gear (10), characterized in that: The surface of the support plate (1) is fixedly connected to the outer frame (2), and the inner side of the outer frame (2) is movably connected to the extrusion cylinder (3). The left and right ends of the support plate (1) are both provided with slots (4) in the center, and the inner side of the slots (4) is laterally slidably connected to the plug plate (5). The plug plate (5) is rotatably connected to the surface of the side facing the outer frame (2) with a rotating shaft (6). The outer side wall of the rotating shaft (6) is fixedly connected to the limiting plate (7), and the outer side walls of the rotating shaft (6) and the limiting plate (7) are movably sleeved with a threaded cylinder (8). The upper and lower surfaces of the threaded cylinder (8) close to the support plate (1) are both threadedly connected to the limiting bolt (801), and one end of the limiting bolt (801) passes through the outer surface of the threaded cylinder (8) and is threadedly connected to the surface of the limiting plate (7).

2. The twin-screw structure of a pre-dispersed masterbatch extruder according to claim 1, characterized in that: A driven gear (9) is rotatably connected to the surface of the inserting plate (5) on the opposite side of the rotating shaft (6), and the driven gear (9) is rotatably connected to the rotating shaft (6) and fixedly connected to one end of the surface of the inserting plate (5).

3. The twin-screw structure of a pre-dispersed masterbatch extruder according to claim 1, characterized in that: A driving gear (10) is rotatably connected to a lower position of the surface of the support plate (1) on the opposite side of the outer frame (2); a sub-gear (1002) is rotatably connected to the surface of the support plate (1) on one side of the driving gear (10); the driving gear (10) is meshed with the driven gear (9) and the sub-gear (1002) on one side; the sub-gear (1002) is meshed with the driven gear (9) on the other side; and the center of the outer surface of the driving gear (10) is fixedly connected to the output end of the transmission shaft of the matching motor (1001).

4. The twin-screw structure of a pre-dispersed masterbatch extruder according to claim 1, characterized in that: An inserting hole (502) is provided on the inner side wall of the slot (4), and an inserting block (501) is fixedly connected to the outer surface of the inserting plate (5) at a horizontal position of the inserting hole (502).

5. The twin-screw structure of a pre-dispersed masterbatch extruder according to claim 1, characterized in that: A sub-frame (503) is fixedly connected to the surface of the inserting plate (5) on the side of the rotating shaft (6) away from the center of the supporting plate (1), and the upper and lower ends of the sub-frame (503) are respectively fitted with the surfaces of the upper and lower outer frames (2).

6. The twin-screw structure of a pre-dispersed masterbatch extruder according to claim 1, characterized in that: The upper and lower outer surfaces of the outer frame (2) are both threadedly connected with fixing bolts (201), and the fixing bolts (201) penetrate the surface of the outer frame (2) and are threadedly connected to the extrusion barrel (3), and the upper and lower surfaces of the extrusion barrel (3) are respectively provided with a feed port (301) and a discharge port (302).

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