Discharging device for screw extruder

Abstract

The utility model relates to the technical field of plastic production and processing, and provides a discharging device for a screw extruder, the discharging device comprises a discharging hopper, a discharging pipe and a locking assembly, the upper end of the discharging hopper communicates with a raw material bin, one end of the discharging pipe is detachably connected to the lower end of the discharging hopper and is locked through the locking assembly, and the other end of the discharging pipe is detachably connected to the lower end of the discharging hopper. One end, far away from the blanking hopper, of the blanking pipe is communicated with a screw extruder; the discharging pipe comprises a first pipe, a hose and a second pipe which are sequentially connected, the first pipe is detachably connected with the discharging hopper, the hose is used for connecting the first pipe and the second pipe, and the second pipe is detachably connected to a screw extruder. The screw extruder has the effect that the feeding hopper of the screw extruder can be conveniently cleaned.

Description

Technical Field

[0001] This application relates to the field of plastic production and processing technology, and in particular to a feeding device for a screw extruder. Background Technology

[0002] Plastic granulation is a plastics machining process that involves melting, extruding, and pelletizing various forms of plastic into uniform granules that are easy to process further. The screw extruder is the core equipment in plastic granulation. It relies on the pressure and shear force generated by the rotating screw to fully plasticize and uniformly mix the material, which is then shaped through a die. Therefore, in the plastic granulation process, the screw extruder typically performs the tasks of mixing, heating, kneading, and extruding the material simultaneously.

[0003] During the production process, a hopper is installed at the feed inlet of the screw extruder to facilitate material feeding. The hopper is directly connected to the material silo located in the upper structure, and the material in the material silo will enter the screw extruder through the hopper.

[0004] Regarding the aforementioned technologies, currently the upper end of the hopper is fixedly connected to the material hopper, while the lower end is generally directly connected to the feed inlet of the screw extruder. When blockage occurs inside the hopper, it is inconvenient to clean the inner wall of the hopper, thus requiring improvement. Utility Model Content

[0005] To facilitate cleaning of the feed hopper of a screw extruder and reduce maintenance difficulty, this application provides a feeding device for a screw extruder.

[0006] The feeding device for a screw extruder provided in this application adopts the following technical solution:

[0007] A feeding device for a screw extruder includes a feeding hopper, a feeding pipe, and a locking assembly. The upper end of the feeding hopper is connected to a raw material hopper. One end of the feeding pipe is detachably connected to the lower end of the feeding hopper and locked by the locking assembly. The end of the feeding pipe away from the feeding hopper is connected to the screw extruder.

[0008] The feed pipe includes a first pipe, a hose, and a second pipe connected in sequence. The first pipe is detachably connected to the feed hopper. The hose is used to connect the first pipe and the second pipe. The second pipe is detachably connected to the screw extruder.

[0009] By adopting the above technical solution, during the production process, the material in the material bin flows sequentially along the feed hopper and feed pipe, and then enters the screw extruder for plastic granulation. When blockage occurs in the feed hopper, the locking assembly can be released from its force on the feed pipe. Then, the first pipe is removed from the feed hopper, and the second pipe is simultaneously removed from the feed inlet of the screw extruder, thus separating the feed hopper and feed pipe. At this point, the lower opening of the feed hopper is open, facilitating cleaning by personnel.

[0010] Preferably, the locking assembly includes a clamp and a bolt and nut, with the end of the first tube away from the hose sleeved on the hopper, the clamp sleeved on the outer surface of the first tube, and both ends locked by the bolt and nut.

[0011] By adopting the above technical solution, during installation, the first pipe is first fitted onto the lower end of the hopper, then the clamp is attached to the outer surface of the first pipe, and finally the bolts are passed through both ends of the clamp at the same time, and the two ends of the clamp are locked together with nuts, so that the first pipe and the hopper are fixed under pressure.

[0012] Preferably, the outer wall of the lower end of the hopper is provided with a groove, and the inner wall of the upper end of the first tube is provided with a protruding ring. When the first tube is sleeved on the hopper, the protruding ring is engaged in the groove.

[0013] By adopting the above technical solution, when the first pipe is attached to the hopper, the convex ring will be properly attached to the groove, thereby improving the connection stability between the first pipe and the hopper.

[0014] Preferably, it also includes a heat insulation pad, which is disposed on the outer wall of the first pipe and the second pipe.

[0015] By adopting the above technical solution, since the screw extruder needs to be heated during operation, the surface temperature of the first and second tubes can easily rise under heat transfer, which could easily cause burns if workers accidentally touch them. By adding an insulation layer, which has poor thermal conductivity, burns can be prevented, thus improving safety.

[0016] Preferably, the hopper has a circular cross-section, and the upper opening of the hopper is larger than the lower opening.

[0017] Preferably, it also includes a material cutting component, which is disposed on the first tube and is used to cut off the material from entering the screw extruder.

[0018] By adopting the above technical solution, since the screw extruder has limited processing capacity, once enough material is fed, the material interception component can be activated to intercept the material in the hopper and feed pipe, thereby stopping the feeding of material into the screw extruder.

[0019] Preferably, the material cutting assembly includes a drive motor and a baffle. The baffle is rotatably connected inside the first tube, and the rotation axis of the baffle is in the horizontal direction. The drive motor is connected to the baffle and is used to control the rotation of the baffle.

[0020] By adopting the above technical solution, when it is necessary to intercept material, the drive motor is used to control the baffle to rotate, so that the baffle rotates to a position flush with the cross-section of the first tube, thereby achieving material interception. When it is necessary to feed material into the screw extruder, the drive motor can be used to rotate the baffle ninety degrees, so that the plane of the baffle is perpendicular to the cross-section of the first tube, so that the material falls into the screw extruder.

[0021] Preferably, the inner walls of both the hopper and the pipe are coated with an epoxy resin anti-corrosion layer.

[0022] By adopting the above technical solutions, the epoxy resin anti-corrosion layer can improve the corrosion resistance of the hopper and the discharge pipe, and extend their service life.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] (1) By setting up a feed pipe and a locking assembly, the force exerted on the feed pipe by the locking assembly can be released when blockage occurs in the feed hopper. Then, the first pipe is removed from the feed hopper, and the second pipe is taken out from the feed inlet of the screw extruder, thus separating the feed hopper and the feed pipe. At this time, the lower opening of the feed hopper is open, which is convenient for the staff to clean, and of course, it is also convenient to clean and maintain the feed pipe separately.

[0025] (2) By setting a convex ring and a groove, when the first tube is attached to the hopper, the convex ring will be attached to the groove, which improves the connection stability between the first tube and the hopper and further reduces the possibility of the first tube falling off the hopper.

[0026] (3) By setting up a heat insulation pad, the heat insulation pad has poor thermal conductivity and can play a role in heat insulation, preventing personnel from being burned by touching the feed pipe and improving safety. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the feeding device in the embodiments of this application;

[0028] Figure 2 This is an exploded schematic diagram of the hopper and feed pipe in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the connection between the feeding device and the screw extruder in an embodiment of this application;

[0030] Figure 4This is a cross-sectional schematic diagram of the feeding device AA in the embodiments of this application.

[0031] Reference numerals: 1. Feed hopper; 2. Feed pipe; 21. First pipe; 22. Hose; 23. Second pipe; 3. Locking assembly; 31. Clamp; 32. Bolt and nut; 4. Groove; 5. Raised ring; 6. Cutting assembly; 61. Drive motor; 62. Baffle. Detailed Implementation

[0032] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.

[0033] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0036] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.

[0037] This application discloses a feeding device for a screw extruder. (Refer to...) Figure 1 and Figure 2The feeding device includes a feeding hopper 1, a feeding pipe 2, and a locking assembly 3. The upper end of the feeding hopper 1 is connected to the raw material hopper. One end of the feeding pipe 2 is detachably connected to the lower end of the feeding hopper 1 and locked to the feeding hopper 1 by the locking assembly 3. The end of the feeding pipe 2 away from the feeding hopper 1 is connected to the screw extruder. In this embodiment, the feeding hopper 1 is made of metal, which has a certain elastic deformation capability. As shown in the figure, the cross-section of the feeding hopper 1 is circular, and the opening at the upper end of the feeding hopper 1 is larger than the opening at the lower end.

[0038] Specifically, the feed pipe 2 includes a first pipe 21, a flexible hose 22, and a second pipe 23 connected in sequence. The first pipe 21 and the second pipe 23 are rigid metal pipes and are cylindrical in shape, with the same diameter. The flexible hose 22 is a corrugated hose used to connect the first pipe 21 and the second pipe 23. The first pipe 21 is detachably connected to the feed hopper 1, and the second pipe 23 is detachably connected to the screw extruder.

[0039] Combination Figure 3 The locking assembly 3 is used to lock the first pipe 21 onto the discharge hopper 1. The locking assembly 3 includes a clamp 31 and bolts and nuts 32. The end of the first pipe 21 away from the hose 22 is sleeved on the discharge hopper 1. The clamp 31 is sleeved on the outer surface of the first pipe 21 and is arranged along the circumference of the first pipe 21. The two ends of the clamp 31 are locked together by bolts and nuts 32. The first pipe 21 and the discharge hopper 1 are fixed by pressure. During installation, the first pipe 21 is first sleeved on the lower end of the discharge hopper 1, then the clamp 31 is attached to the outer surface of the first pipe 21, and finally the bolts are passed through both ends of the clamp 31 at the same time, and the two ends of the clamp 31 are locked together with the nuts, so as to realize the detachable connection between the discharge hopper 1 and the discharge pipe 2.

[0040] The inner walls of the hopper 1, the first pipe 21, and the second pipe 23 are all coated with an epoxy resin anti-corrosion layer (not shown in the figure). The epoxy resin anti-corrosion layer can improve the corrosion resistance of the hopper 1 and the discharge pipe 2 and extend their service life. In some embodiments, a groove 4 is formed on the outer wall of the lower end of the hopper 1, and a protruding ring 5 is integrally connected to the inner wall of the upper end of the first pipe 21. When the first pipe 21 is sleeved on the hopper 1, the protruding ring 5 can be engaged in the groove 4. The connection stability between the first pipe 21 and the hopper 1 is improved by the mutual cooperation between the protruding ring 5 and the groove 4.

[0041] In addition, heat-insulating pads made of heat-insulating material are fitted onto the outer walls of the first tube 21 and the second tube 23. Since the screw extruder requires heating during operation, the surface temperature of the first tube 21 and the second tube 23 can easily rise due to heat transfer. If workers accidentally touch them, they are prone to burns. By adding heat-insulating pads, which have relatively poor thermal conductivity, even if workers accidentally touch the first tube 21 and the second tube 23, burns can be prevented, improving production safety.

[0042] Combination Figure 4 In some embodiments, a material-cutting assembly 6 is installed on the first pipe 21. The material-cutting assembly 6 is used to cut off the material from entering the screw extruder. Since the screw extruder has limited processing capacity, once enough material has been fed, the material-cutting assembly 6 can be activated to retain the material in the feed hopper 1 and the feed pipe 2, thereby stopping the feeding of material into the screw extruder.

[0043] The material cutting assembly 6 includes a drive motor 61 and a baffle 62. The baffle 62 is rotatably connected inside the first tube 21, and its rotation axis is horizontal. The baffle 62 is a circular plate, and its outer diameter is slightly smaller than the inner diameter of the first tube 21. The drive motor 61 is mounted on the outer wall of the first tube 21, and its output shaft is connected to the baffle 62. The drive motor 61 is used to control the rotation of the baffle 62. The output shaft of the drive motor 61 has a self-locking function. The self-locking structure allows existing technology to be directly applied to this application, and will not be elaborated here.

[0044] When material needs to be intercepted, the drive motor 61 is used to control the baffle 62 to rotate, so that the baffle 62 rotates to a position flush with the cross-section of the first tube 21, thereby cutting off the material. When it is necessary to feed material into the screw extruder, the drive motor 61 can be used to rotate the baffle 62 by 90 degrees, so that the plane of the baffle 62 is perpendicular to the cross-section of the first tube 21, so that the material falls into the screw extruder.

[0045] The implementation principle of a feeding device for a screw extruder according to an embodiment of this application is as follows: During the production process, the material in the material bin flows sequentially along the feeding hopper 1 and the feeding pipe 2, and then enters the screw extruder for plastic granulation. When blockage occurs in the feeding hopper 1, the force exerted on the feeding pipe 2 by the locking assembly 3 can be released. Then, the first pipe 21 is removed from the feeding hopper 1, and the second pipe 23 is removed from the feed inlet of the screw extruder, thus separating the feeding hopper 1 and the feeding pipe 2. At this time, the lower opening of the feeding hopper 1 is open, which facilitates cleaning by the staff and also allows the staff to clean and maintain the feeding pipe 2 separately.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A feeding device for a screw extruder, characterized in that, It includes a feeding hopper (1), a feeding pipe (2) and a locking assembly (3). The upper end of the feeding hopper (1) is connected to the raw material silo. One end of the feeding pipe (2) is detachably connected to the lower end of the feeding hopper (1) and locked by the locking assembly (3). The end of the feeding pipe (2) away from the feeding hopper (1) is connected to the screw extruder. The feed pipe (2) includes a first pipe (21), a hose (22) and a second pipe (23) connected in sequence. The first pipe (21) is detachably connected to the feed hopper (1). The hose (22) is used to connect the first pipe (21) and the second pipe (23). The second pipe (23) is detachably connected to the screw extruder.

2. The feeding device for a screw extruder according to claim 1, characterized in that, The locking assembly (3) includes a clamp (31) and a bolt and nut (32). The end of the first tube (21) away from the hose (22) is sleeved on the hopper (1). The clamp (31) is sleeved on the outer surface of the first tube (21) and both ends are locked by the bolt and nut (32).

3. The feeding device for a screw extruder according to claim 1, characterized in that, The lower end of the hopper (1) has a groove (4) on its outer side wall, and the upper end of the first tube (21) has a protruding ring (5) on its inner wall. When the first tube (21) is sleeved on the hopper (1), the protruding ring (5) is engaged in the groove (4).

4. The feeding device for a screw extruder according to claim 1, characterized in that, It also includes a heat insulation pad, which is disposed on the outer wall of the first tube (21) and the second tube (23).

5. A feeding device for a screw extruder according to claim 1, characterized in that, The cross-section of the feeding hopper (1) is circular, and the upper opening of the feeding hopper (1) is larger than the lower opening.

6. A feeding device for a screw extruder according to claim 1, characterized in that, It also includes a material cutting component (6), which is disposed on the first tube (21) and is used to cut off the material from entering the screw extruder.

7. A feeding device for a screw extruder according to claim 6, characterized in that, The material cutting assembly (6) includes a drive motor (61) and a baffle (62). The baffle (62) is rotatably connected inside the first tube (21). The rotation axis of the baffle (62) is in the horizontal direction. The drive motor (61) is connected to the baffle (62) and is used to control the rotation of the baffle (62).

8. A feeding device for a screw extruder according to claim 1, characterized in that, The inner walls of the hopper (1) and the discharge pipe (2) are coated with an epoxy resin anti-corrosion layer.

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