Vacuumizing device of double-screw extruder

Abstract

The utility model discloses a vacuumizing device of a double-screw extruder, which belongs to the field of double-screw extruders and comprises a vacuumizing mechanism mounted on a machine body of the double-screw extruder. The vacuumizing mechanism comprises a vacuumizing pump arranged on one side of the twin-screw extruder body and a vacuum tank connected with the vacuumizing pump through a pipeline; and an exhaust pipeline which is fixedly mounted on the top of the body of the double-screw extruder and is used for performing suction filtration on the inner cavity of the body of the double-screw extruder is also mounted on one side, deviating from the pipeline of the vacuumizing pump, of the vacuum tank. According to the vacuumizing device, tiny impurities such as bubbles and mechanical chippings in a machine body of the double-screw extruder are sucked out through the vacuumizing pump, the fineness of discharging is guaranteed, the vacuumizing device further comprises a dust collecting mechanism, mechanical metal chippings and dust sucked out through the vacuumizing pump are discharged into a collecting bin through a discharging pipe, and the dust collecting mechanism is used for collecting the mechanical metal chippings and the dust. And the effect of cleaning the environment is achieved.

Description

Technical Field

[0001] The utility model relates to the field of twin-screw extruders, in particular to a vacuum pumping device for a twin-screw extruder. Background Art

[0002] Extruders are widely used in the production of plastic products. After the extruder heats and extrude the raw materials, the extruder extrudes the formed plastic from the extruder head. During the extruder processing, the raw materials in the extruder undergo different degrees of gasification, decomposition and precipitation at high temperatures, thereby generating a large amount of low-molecular substances such as gas and precipitates. During the process of the extruder heating and extruding the raw materials, the raw materials are in the semi-enclosed heating tube of the extruder. The low-molecular substances cannot be released well and are mixed in the formed plastic, resulting in defects such as uneven product surface, unsmooth production and processing, decreased product mechanical properties, and loose products. Therefore, a vacuum device is needed to extract bubbles to improve the yield rate.

[0003] The Chinese utility model patent with publication number CN220464668U discloses a twin-screw extruder vacuum pumping device, which can observe and adjust the suction of the exhaust chamber according to demand by installing a pressure gauge and a ball valve on the metal water pipe to meet the vacuum suction requirements of different materials. Although it has achieved the vacuum suction requirements of different materials, due to the small number of exhaust points, it is impossible to improve the adsorption efficiency, which may still cause bubbles to fail to be discharged in time, resulting in a low yield rate.

[0004] Therefore, a vacuum pumping device for a twin-screw extruder is provided to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides a vacuum pumping device for a twin-screw extruder, aiming to solve the problem in the background technology that due to the small number of vacuum points, the adsorption efficiency cannot be improved, and bubbles may still not be discharged in time, resulting in a low yield rate.

[0007] Technical Solution

[0008] To achieve the above object, the utility model provides the following technical solution: a vacuum pumping device for a twin-screw extruder, comprising a vacuum pumping mechanism installed on the body of the twin-screw extruder:

[0009] In order to reduce tiny impurities such as bubbles and mechanical debris in the processing material in the twin-screw extruder body, the vacuum mechanism includes a vacuum pump arranged on one side of the twin-screw extruder body and a vacuum tank connected to the vacuum pump through a pipeline. The vacuum tank is also provided with an exhaust pipeline fixedly installed on the top of the twin-screw extruder body for filtering the inner cavity of the twin-screw extruder body on the side opposite to the pipeline of the vacuum pump. The exhaust pipeline is fixedly installed on the top of the twin-screw extruder body through a vacuum suction device. The bubbles, mechanical debris and other tiny impurities in the twin-screw extruder body are extracted through the exhaust pipeline by adsorption by the vacuum pump to ensure the fineness of the discharged material. The combination of multiple groups of pipelines can further improve the adsorption efficiency.

[0010] Preferably, in order to improve the adsorption efficiency, the exhaust pipeline includes a vertical pipe installed on the outer wall of the vacuum tank, and a main suction pipe for filtration connected to the twin-screw extruder body is fixedly installed on the top of the vertical pipe through a hose, and an auxiliary suction pipe for filtration connected to the twin-screw extruder body is fixedly installed on the outer wall of the main suction pipe through a branch pipe. By arranging the main suction pipe and the auxiliary suction pipe, the twin-screw extruder body is subjected to multi-channel adsorption, thereby further improving the adsorption efficiency.

[0011] Preferably, in order to facilitate the installation of the main straw and the auxiliary straw, the vacuum suction device includes a vacuum suction head fixedly installed on the end of the main straw and the auxiliary straw, and a connecting plate for connecting to the top of the twin-screw extruder body is fixedly installed on the bottom of the vacuum suction head. Corresponding screw holes are opened on the connecting plate for bolts to pass through to fix the connecting plate to the top of the twin-screw extruder body to ensure sealing.

[0012] Preferably, in order to collect the mechanical metal debris and dust sucked out by the vacuum pump and prevent them from spreading and affecting the processing environment, the vacuum device also includes a dust collection mechanism, which includes a discharge pipe fixedly installed on the air outlet end of the vacuum pump and a collection bin placed on one side of the vacuum pump and arranged corresponding to the discharge pipe. The mechanical metal debris and dust sucked out by the vacuum pump are discharged into the collection bin through the discharge pipe, thereby achieving the effect of cleaning the environment.

[0013] Preferably, in order to further ensure that dust and debris will not fly away, the collection bin includes a box body and a dust collecting plate installed in the box body. The dust collecting plate is made of a rough surface material, and the dust and debris are directly adhered thereto to ensure cleanliness. The combination of multiple groups of pipelines can further improve the adsorption efficiency.

[0014] Preferably, in order to facilitate the replacement and maintenance of the dust plate, a plurality of opposing slots are provided on two opposite surfaces of the inner wall of the box body, and the dust plate and the slots are plugged into each other, and the dust plate and the box body are plugged into the slots, which makes disassembly and assembly more convenient and quick, and facilitates the maintenance and replacement of the dust plate.

[0015] Preferably, in order to further prevent dust and debris from flying around, a cover plate matched with the top of the box is sleeved on the outer wall of the discharge pipe, and the box is temporarily closed by the cover plate to ensure that the dust and debris are always in the box, which is safer and more reliable.

[0016] (III) Beneficial effects

[0017] The vacuum device uses a vacuum pump to absorb tiny impurities such as bubbles and mechanical debris in the twin-screw extruder body through the exhaust pipeline to ensure the fineness of the discharged material.

[0018] The vacuum device also includes a dust collection mechanism, which includes a discharge pipe fixedly installed on the air outlet end of the vacuum pump and a collection bin placed on one side of the vacuum pump and arranged corresponding to the discharge pipe. The mechanical metal debris and dust sucked out by the vacuum pump are discharged into the collection bin through the discharge pipe, thereby achieving the effect of cleaning the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the appearance structure of a vacuum pumping device of a twin-screw extruder;

[0020] Figure 2 It is a schematic diagram of the side structure of a vacuum pumping device of a twin-screw extruder;

[0021] Figure 3 The figure is a schematic diagram of the internal structure of a collection bin of a vacuum pumping device of a twin-screw extruder.

[0022] In the figure:

[0023] 1. Twin-screw extruder body; 2. Vacuuming mechanism; 21. Vacuum pump; 22. Vacuum tank; 23. Exhaust pipeline; 231. Vertical pipe; 232. Hose; 233. Main suction pipe; 234. Branch pipe; 235. Auxiliary suction pipe; 24. Vacuum suction device; 241. Vacuum suction head; 242. Connecting plate; 3. Dust collecting mechanism; 31. Discharge pipe; 32. Collection bin; 321. Box body; 322. Dust plate; 323. Slot; 324. Cover plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] This embodiment provides a vacuum pumping device for a twin-screw extruder, such as Figure 1-3 As shown, it includes a vacuum pumping mechanism 2 installed on a twin-screw extruder body 1:

[0027] The vacuum mechanism 2 includes a vacuum pump 21 arranged on one side of the twin-screw extruder body 1 and a vacuum tank 22 connected to the vacuum pump 21 through a pipeline. The vacuum tank 22 is also provided with a vacuum pipeline 23 fixedly installed on the top of the twin-screw extruder body 1 and used for filtering the inner cavity of the twin-screw extruder body 1 on the side opposite to the pipeline of the vacuum pump 21. The vacuum pipeline 23 is fixedly installed on the top of the twin-screw extruder body 1 through a vacuum suction device 24.

[0028] When in use, the exhaust pipe 23 is fixed to the hole pre-opened on the top of the twin-screw extruder body 1, and then the vacuum pump 21 is started, and the air bubbles, mechanical debris and other tiny impurities in the twin-screw extruder body 1 are extracted through the exhaust pipe 23 in conjunction with the vacuum tank 22 to ensure the fineness of the discharged material.

[0029] Furthermore, the exhaust pipeline 23 includes a vertical pipe 231 installed on the outer wall of the vacuum tank 22, and a main suction pipe 233 for filtration connected to the twin-screw extruder body 1 is fixedly installed on the top of the vertical pipe 231 through a hose 232, and an auxiliary suction pipe 235 for filtration connected to the twin-screw extruder body 1 is fixedly installed on the outer wall of the main suction pipe 233 through a branch pipe 234.

[0030] When in use, the vacuum suction device 24 on the main suction pipe 233 and the auxiliary suction pipe 235 is connected to the twin-screw extruder body 1. By setting the main suction pipe 233 and the auxiliary suction pipe 235, the twin-screw extruder body 1 is subjected to multi-channel adsorption, thereby further improving the adsorption efficiency.

[0031] Furthermore, the vacuum suction device 24 includes a vacuum suction head 241 fixedly mounted on the ends of the main suction pipe 233 and the auxiliary suction pipe 235, and a connecting plate 242 for connecting to the top of the twin-screw extruder body 1 is fixedly mounted on the bottom of the vacuum suction head 241. When in use, corresponding screw holes are opened on the connecting plate 242, and bolts are passed through to fix the connecting plate 242 to the top of the twin-screw extruder body 1 to ensure sealing.

[0032] Example 2

[0033] Different from Example 1, Figure 1 , Figure 2 and Figure 3As shown, the vacuum device further includes a dust collecting mechanism 3, which includes a discharge pipe 31 fixedly mounted on the air outlet of the vacuum pump 21 and a collection bin 32 disposed on one side of the vacuum pump 21 and corresponding to the discharge pipe 31. When in use, the mechanical metal debris and dust sucked out by the vacuum pump 21 are discharged into the collection bin 32 through the discharge pipe 31, thereby achieving the effect of cleaning the environment.

[0034] The collecting bin 32 includes a box body 321 and a dust collecting plate 322 installed in the box body 321. When in use, the dust collecting plate 322 is made of a rough surface material, and dust and debris are directly adhered thereto to ensure cleanliness.

[0035] Furthermore, a plurality of opposite slots 323 are provided on two opposite surfaces of the inner side wall of the box body 321, and the dust collecting plate 322 is plugged into the slots 323. When in use, when installing, the dust collecting plate 322 is aligned with the slots 323 in the box body 321 for plugging, and when removing, the dust collecting plate 322 can be directly lifted out, which is more convenient and quick to disassemble and install, and is convenient for maintenance and replacement of the dust collecting plate 322.

[0036] Furthermore, a cover plate 324 is sleeved on the outer wall of the discharge pipe 31 and is matched with the top of the box body 321. When in use, the box body 321 is opened by pulling up the cover plate 324 so as to replace the dust plate 322. When in use, the cover plate 324 is lowered, and the cover plate 324 temporarily closes the box body 321 to ensure that dust and debris are always in the box body 321, which is safer and more reliable.

[0037] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A vacuum pumping device for a twin-screw extruder, comprising a vacuum pumping mechanism (2) mounted on a twin-screw extruder body (1), characterized in that: The vacuum pumping mechanism (2) comprises a vacuum pump (21) arranged on one side of the twin-screw extruder body (1) and a vacuum tank (22) connected to the vacuum pump (21) via a pipeline. The vacuum tank (22) is also provided with an exhaust pipeline (23) fixedly mounted on the top of the twin-screw extruder body (1) and used for filtering the inner cavity of the twin-screw extruder body (1) on the side opposite to the pipeline of the vacuum pump (21). The exhaust pipeline (23) is fixedly mounted on the top of the twin-screw extruder body (1) via a vacuum suction device (24).

2. A vacuum pumping device for a twin-screw extruder according to claim 1, characterized in that: The exhaust pipeline (23) comprises a vertical pipe (231) mounted on the outer wall of the vacuum tank (22); a main suction pipe (233) for suction filtration connected to the twin-screw extruder body (1) is fixedly mounted on the top of the vertical pipe (231) via a hose (232); an auxiliary suction pipe (235) for suction filtration connected to the twin-screw extruder body (1) is fixedly mounted on the outer wall of the main suction pipe (233) via a branch pipe (234).

3. A vacuum pumping device for a twin-screw extruder according to claim 2, characterized in that: The vacuum suction device (24) comprises a vacuum suction head (241) fixedly mounted on the ends of the main suction pipe (233) and the auxiliary suction pipe (235), and a connecting plate (242) for connecting to the top of the twin-screw extruder body (1) is fixedly mounted on the bottom of the vacuum suction head (241).

4. A vacuum pumping device for a twin-screw extruder according to claim 3, characterized in that: The vacuum device further comprises a dust collecting mechanism (3), wherein the dust collecting mechanism (3) comprises a discharge pipe (31) fixedly mounted on the air outlet end of the vacuum pump (21) and a collection bin (32) disposed on one side of the vacuum pump (21) and corresponding to the discharge pipe (31).

5. A vacuum pumping device for a twin-screw extruder according to claim 4, characterized in that: The collecting bin (32) comprises a box body (321) and a dust collecting plate (322) installed in the box body (321).

6. A vacuum pumping device for a twin-screw extruder according to claim 5, characterized in that: A plurality of groups of opposing slots (323) are provided on two opposite surfaces of the inner side wall of the box body (321), and the dust collecting plates (322) and the slots (323) are plugged into each other.

7. The vacuum pumping device for a twin-screw extruder according to claim 5, characterized in that: A cover plate (324) adapted to the top of the box body (321) is sleeved on the outer wall of the discharge pipe (31).

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