Twin-screw extruder for molding plastic products

Abstract

The utility model relates to the technical field of double-screw extruders, and discloses a double-screw extruder for forming plastic products, which comprises a butt flange, the upper side of the butt flange is communicated with a fixed cylinder, the lower port of the fixed cylinder is fixedly connected with a second barrier plate, a plurality of second leak holes are formed in the second barrier plate, and the second leak holes are communicated with the fixed cylinder. The inner side of the fixing cylinder is rotatably connected with a limiting cylinder, the lower end opening of the limiting cylinder is fixedly connected with a first blocking plate, and a first leakage hole is formed in the first blocking plate. According to the device, the limiting cylinder rotates on the inner side of the fixing cylinder, so that the effect that the first leakage hole in the first blocking plate and the second leakage hole in the second blocking plate are mutually blocked or communicated is achieved; in this way, when the double screws are detached from the machine barrel and need to be moved out of the hopper, the first blocking plate rotates to block the second leaking hole in the second blocking plate in a matched mode, and raw materials in the hopper are prevented from spilling out.

Description

Technical Field

[0001] This utility model relates to the field of twin-screw extruder technology, and in particular to a twin-screw extruder for molding plastic products. Background Technology

[0002] After prolonged use, material residue may remain on the screw and barrel of a twin-screw extruder. This residue can gel at high temperatures, slowing down the extrusion speed and even affecting product quality. Therefore, in practice, it is necessary to periodically remove and clean the screw of the twin-screw extruder to restore it to normal operating condition. However, to remove the screw from the extruder, the hopper must first be removed from the barrel. If a small amount of plastic material remains in the hopper at this time, it may spill out. In addition, repeated friction between the hopper and the barrel over a long period of time may cause wear and tear on the flange at the hopper's interface, resulting in reduced sealing. Based on this, a twin-screw extruder for molding plastic products is proposed. Utility Model Content

[0003] To solve the technical problem of hopper installation in twin-screw extruders, this utility model provides a twin-screw extruder for molding plastic products.

[0004] This utility model is achieved using the following technical solution: a twin-screw extruder for molding plastic products, comprising a docking flange, a fixed cylinder connected to the upper side of the docking flange, a second baffle plate fixedly connected to the lower end of the fixed cylinder, the second baffle plate having multiple second-order drain holes, a limiting cylinder rotatably connected to the inner side of the fixed cylinder, a first baffle plate fixedly connected to the lower end of the limiting cylinder, the first baffle plate having a first-order drain hole, the first baffle plate being located above the second baffle plate, a twin-screw extruder mechanism being provided below the docking flange, and a material barrel mechanism being provided above the fixed cylinder.

[0005] As a further improvement to the above solution, the twin-screw extruder mechanism includes a barrel communicating with the lower side of the docking flange, and a frame is fixedly connected to the lower side of the barrel.

[0006] As a further improvement to the above solution, the material bucket mechanism includes a load-bearing column rotatably connected to the upper side of the frame, a hopper fixedly connected to one side of the load-bearing column, a rod driving mechanism for rotating the limiting cylinder is provided on the lower side of the hopper, and telescopic shock absorption mechanisms are provided on both sides of the hopper.

[0007] As a further improvement to the above solution, the insertion rod driving mechanism includes a connecting pipe that communicates with the lower side of the hopper. Multiple pointers are fixedly connected to the side of the connecting pipe and are arranged in a circumferential array. Multiple spiral grooves are opened on the inner side of the limiting cylinder and are arranged in a circumferential array. One end of each pointer slides on the inner side of each spiral groove.

[0008] As a further improvement to the above solution, the telescopic shock absorption mechanism includes multiple sliding cylinders fixedly connected to the outside of the fixed cylinder, with limit rods slidably connected to the inner sides of the multiple sliding cylinders, the upper ends of the multiple limit rods fixedly connected to the lower side of the hopper, and an elastic component provided on the outer side of each limit rod.

[0009] As a further improvement to the above solution, the component includes a spring sleeved on the outside of each of the limiting rods, the upper end of each spring being fixedly connected to the lower side of the hopper, and the lower end of each spring being fixedly connected to the upper side of the slide cylinder.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model achieves the effect of blocking or connecting the No. 1 leakage hole on the No. 1 baffle plate and the No. 2 leakage hole on the No. 2 baffle plate by rotating the limiting cylinder inside the fixed cylinder. In this way, when the twin screw needs to be removed from the machine barrel, the No. 1 baffle plate rotates and can cooperate to block the No. 2 leakage hole on the No. 2 baffle plate to prevent the raw materials in the hopper from spilling out.

[0012] 2. This utility model uses a limit rod, spring and slide cylinder to cooperate with each other. When the hopper is moved away from the top of the machine cylinder, the spring rebounds and the docking flange and the fixed cylinder descend. Conversely, when the hopper is reset and installed in the machine cylinder, the docking flange and the fixed cylinder can be moved upward with manual assistance to avoid rigid wear between the docking flange, the fixed cylinder and the outer surface of the machine cylinder. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of a twin-screw extruder for molding plastic products provided by this utility model;

[0014] Figure 2 for Figure 1 Disassembly diagram;

[0015] Figure 3 for Figure 2 A cross-sectional view of the middle hopper (11);

[0016] Figure 4 for Figure 3 A schematic diagram of the exploded structure;

[0017] Figure 5 for Figure 4 A bottom view;

[0018] Figure 6 for Figure 5 A cross-sectional view of the middle limiting cylinder (8).

[0019] Explanation of key symbols:

[0020] 1. Frame; 2. Cylinder; 3. Support column; 4. Limiting rod; 5. Connecting pipe; 6. Fixed cylinder; 7. Connecting flange; 8. Limiting cylinder; 9. Sliding cylinder; 10. Spring; 11. Hopper; 12. Spiral groove; 13. No. 1 drain hole; 14. No. 1 baffle plate; 15. No. 2 baffle plate; 16. No. 2 drain hole; 17. Pointer. Detailed Implementation

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example:

[0023] Please combine Figures 1-6 This embodiment of a twin-screw extruder for molding plastic products includes a docking flange 7, which is made of hard alloy material and has excellent wear resistance and corrosion resistance. A fixed cylinder 6 is connected to the upper side of the docking flange 7, and a second baffle plate 15 is fixedly connected to the lower end of the fixed cylinder 6. In this embodiment, the second baffle plate 15 has four second-stage drain holes 16, which are circular holes distributed circumferentially. A limiting cylinder 8 is rotatably connected to the inner side of the fixed cylinder 6, and a first baffle plate 14 is fixedly connected to the lower end of the limiting cylinder 8. A first drain hole 13 is opened on the first baffle plate 14, and the first drain hole 13 has the same radius as the second drain hole 16, allowing them to be aligned vertically and fully connected. The first baffle plate 14 is located above the second baffle plate 15. A twin-screw extruder mechanism is provided on the lower side of the docking flange 7, and a material barrel mechanism is provided on the upper side of the fixed cylinder 6.

[0024] Please combine Figure 1 As shown, the twin-screw extruder mechanism includes a barrel 2 that communicates with the lower side of the docking flange 7. The barrel 2 contains a twin screw, and a frame 1 is fixedly connected to the lower side of the barrel 2. Extruder components such as extruder heads and cooling units are installed on the frame 1.

[0025] Please combine Figure 1 As shown, the material bucket mechanism includes a load-bearing column 3 rotatably connected to the upper side of the frame 1. A hopper 11 is fixedly connected to one side of the load-bearing column 3. When the hopper 11 rotates, it can drive the load-bearing column 3 to rotate. A rod drive mechanism for rotating the limiting cylinder 8 is provided on the lower side of the hopper 11. Telescopic shock absorption mechanisms are provided on both sides of the hopper 11.

[0026] Please combine Figure 4As shown, the insertion rod driving mechanism includes a connecting pipe 5 that communicates with the lower side of the hopper 11. In this embodiment, four pointers 17 are fixedly connected to the side of the connecting pipe 5. The four pointers 17 are arranged in a circular array. Four spiral grooves 12 are opened on the inner side of the limiting cylinder 8. The four spiral grooves 12 are arranged in a circular array. One end of the pointer 17 slides on the inner side of each spiral groove 12. When the pointer 17 is inserted downward along the spiral groove 12, the limiting cylinder 8 rotates clockwise. Conversely, when the pointer 17 is raised upward along the spiral groove 12, the limiting cylinder 8 rotates counterclockwise. This time, the effect of mutual blocking or communication between the second blocking plate 15 and the first blocking plate 14 is achieved.

[0027] Please combine Figure 2 As shown, the telescopic shock absorption mechanism includes two sliding cylinders 9 fixedly connected to the outside of the fixed cylinder 6. Limiting rods 4 are slidably connected to the inner sides of the two sliding cylinders 9 respectively. The upper ends of the two limiting rods 4 are fixedly connected to the lower side of the hopper 11. An elastic component is provided on the outer side of each limiting rod 4.

[0028] Please combine Figure 4 As shown, the assembly includes a spring 10 sleeved on the outside of each limiting rod 4. The upper end of each spring 10 is fixedly connected to the lower side of the hopper 11, and the lower end of each spring 10 is fixedly connected to the upper side of the slide cylinder 9. When the hopper 11 moves closer to the machine cylinder 2, the spring 10 deforms and compresses, and the fixed cylinder 6 moves upward relative to it. When it is necessary to remove the hopper 11 from the machine cylinder 2, the spring 10 deforms and extends, and the fixed cylinder 6 moves downward under the action of its own weight and the thrust of the spring 10.

[0029] The implementation principle of a twin-screw extruder for molding plastic products in this embodiment is as follows: When it is necessary to remove the hopper 11 from the barrel 2, the load-bearing column 3 is rotated, causing the connecting flange 7 to slowly move from the barrel 2 to one side. When it moves to a certain position, the spring 10 rebounds and pushes the fixed cylinder 6 downward. The sliding cylinder 9 slides downward along the limiting rod 4. Since the pointer 17 is fixedly connected to the surface of the connecting pipe 5, under the limitation of the spiral groove 12, the limiting cylinder 8 is pushed to rotate inside the fixed cylinder 6, which indirectly drives the first blocking plate 14 and the second blocking plate 15 to be misaligned, so that the first blocking plate 14 blocks the second leakage hole 16 on the second blocking plate 15, thereby achieving the effect of preventing leakage.

[0030] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A twin-screw extruder for molding a plastic product, comprising a butt flange (7), characterized in that, The upper side of the docking flange (7) is connected to a fixed cylinder (6), and the lower end of the fixed cylinder (6) is fixedly connected to a second baffle plate (15). The second baffle plate (15) has multiple second-level leakage holes (16). The inner side of the fixed cylinder (6) is rotatably connected to a limiting cylinder (8). The lower end of the limiting cylinder (8) is fixedly connected to a first baffle plate (14). The first baffle plate (14) has a first-level leakage hole (13). The first baffle plate (14) is located above the second baffle plate (15). The lower side of the docking flange (7) is provided with a twin-screw extruder mechanism, and the upper side of the fixed cylinder (6) is provided with a material bucket mechanism.

2. A twin-screw extruder for molding a plastic product as set forth in claim 1, wherein The twin-screw extruder mechanism includes a barrel (2) communicating with the lower side of the docking flange (7), and a frame (1) is fixedly connected to the lower side of the barrel (2).

3. A twin-screw extruder for molding a plastic product as defined in claim 2, wherein The material bucket mechanism includes a load-bearing column (3) rotatably connected to the upper side of the frame (1), a hopper (11) is fixedly connected to one side of the load-bearing column (3), a rod drive mechanism for rotating the limiting cylinder (8) is provided on the lower side of the hopper (11), and telescopic shock absorption mechanisms are provided on both sides of the hopper (11).

4. A twin-screw extruder for molding a plastic product as defined in claim 3, wherein The insertion rod driving mechanism includes a connecting pipe (5) connected to the lower side of the hopper (11). Multiple pointers (17) are fixedly connected to the side of the connecting pipe (5). The multiple pointers (17) are arranged in a circumferential array. Multiple spiral grooves (12) are opened on the inner side of the limiting cylinder (8). The multiple spiral grooves (12) are arranged in a circumferential array. One end of each pointer (17) slides on the inner side of each spiral groove (12).

5. A twin-screw extruder for molding a plastic product as defined in claim 3, wherein The telescopic shock absorption mechanism includes multiple sliding cylinders (9) fixedly connected to the outside of the fixed cylinder (6). Limiting rods (4) are slidably connected to the inner sides of the multiple sliding cylinders (9). The upper ends of the multiple limiting rods (4) are fixedly connected to the lower side of the hopper (11). An elastic component is provided on the outer side of each limiting rod (4).

6. A twin-screw extruder for molding a plastic product as defined in claim 5, wherein The component includes a spring (10) sleeved on the outside of each of the limiting rods (4), the upper end of each spring (10) being fixedly connected to the lower side of the hopper (11), and the lower end of each spring (10) being fixedly connected to the upper side of the slide cylinder (9).

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