Vacuumizing device for die inlet of plastic extruding machine

Abstract

The utility model discloses a vacuumizing device for a die inlet of a plastic extruding machine, which comprises a base, two upright posts are symmetrically fixed on the top surface of the base, an extruding machine is fixed on the top surfaces of the two upright posts together, an extruding piece is rotatably connected in the extruding machine, and the tail end of the extruding piece is fixedly connected with an exhaust piece. A hopper is vertically fixed on the top surface of the extruder, a sealing plug is connected in the hopper in a threaded manner, a vacuum part is fixedly connected outside the extruder, and the vacuum part is fixed on the top surface of the base. According to the utility model, the extrusion piece is rotationally connected in the extruder, the exhaust piece is fixedly connected at the tail end of the extrusion piece, and the vacuum piece is connected outside the extruder, so that gas of raw materials in the extruder is stirred and exhausted, and residual gas and bubbles in the raw materials are prevented from influencing the quality of extruded plastics; and therefore, the quality of plastic extruded by the extruder is improved.

Description

Technical Field

[0001] This utility model relates to the field of extrusion machine technology, and in particular to a vacuum device for the inlet of an extrusion machine. Background Technology

[0002] Plastic extruders are used to plasticize and mold plastics. Granular plastic is fed into the extruder, and then the extrusion system forces the plastic granules to be continuously extruded from the die head at a certain pressure and speed to become the desired plastic parts.

[0003] Air is present inside an extruder during operation. This air enters the plastic during extrusion, causing bubbles and pores in the extruded plastic, thus affecting the quality of the plastic parts. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a vacuum device for the inlet of an extruder.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a vacuum device for the inlet of an extruder, comprising a base, two columns symmetrically fixed on the top surface of the base, an extruder jointly fixed on the top surface of the two columns, an extruder rotatably connected inside the extruder, an exhaust component fixedly connected to the end of the extruder, a hopper vertically fixed on the top surface of the extruder, a sealing plug threadedly connected inside the hopper, and a vacuum component fixedly connected to the outside of the extruder, the vacuum component being fixed on the top surface of the base.

[0006] As a further description of the above technical solution: the extruder includes a guide plate rotatably connected inside the extruder, a drive motor is horizontally fixed outside the extruder, the output end of the drive motor is driven and connected to a rotating shaft, the rotating shaft rotatably passes through the extruder and is fixedly connected to the guide plate, a first electric push rod is horizontally fixed inside the guide plate, a push block is fixedly connected to the end of the first electric push rod, the end of the push block is provided with a groove, and the exhaust component is fixed in the groove.

[0007] As a further description of the above technical solution: the exhaust component includes a second electric push rod fixedly embedded in the center of the groove, the end of the second electric push rod is fixedly connected to a support plate, the groove is provided with a plurality of equally spaced annular arrays of storage slots, each of the storage slots is slidably inserted with a stirring shaft, and the plurality of stirring shafts are horizontally fixed to the support plate.

[0008] As a further description of the above technical solution: multiple equidistantly distributed stirring blocks are symmetrically fixed on the outer edge of each stirring shaft, and two guide grooves are symmetrically provided on the inner wall of each receiving groove, the guide grooves being adapted to the multiple stirring blocks.

[0009] As a further description of the above technical solution: the vacuum component includes a vacuum pump fixed on the top surface of the base, an air pipe fixedly connected to the end of the vacuum pump, a cylinder fixedly connected to the end of the air pipe, the cylinder fixedly connected to and communicating with the extruder, a sealing component slidably connected inside the cylinder, and a limiting component rotating through the outside of the cylinder.

[0010] As a further description of the above technical solution: the sealing element includes a support ring suspended and fixed inside the cylinder. A sealing groove is concentrically formed on the top surface of the support ring. Two limiting grooves are symmetrically arranged in the sealing groove. A limiting block is slidably connected in each limiting groove. The top surfaces of the two limiting blocks are used to fix a sealing plate. The sealing plate abuts against the sealing groove. A sliding groove is provided in each limiting groove. A slider is slidably connected in each sliding groove. The slider is fixedly connected to the limiting block. A spring is fixedly connected between the inner wall of the sliding groove and the slider. The limiting element is threadedly connected to the sealing plate.

[0011] As a further description of the above technical solution: the sealing element includes a connecting rod concentrically fixed to the top surface of the sealing plate, the outer edge of the connecting rod is provided with a threaded groove, the side of the cylinder is horizontally fixed with an internally threaded pipe, the internal thread of the internally threaded pipe is threaded through a bolt, the bolt rotates through the cylinder and is threadedly connected in the threaded groove.

[0012] This utility model has the following beneficial effects:

[0013] Compared with existing technologies, this vacuum device for extruder inlet uses a rotating extruder component inside the extruder, a fixed exhaust component at the end of the extruder component, and a vacuum component connected outside the extruder to stir and exhaust the gas in the raw material inside the extruder. This prevents residual gas and bubbles in the raw material from affecting the quality of the extruded plastic, thereby improving the quality of the extruded plastic. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of the overall structure of a vacuum device for the inlet of an extruder proposed in this utility model;

[0015] Figure 2 This is a main sectional view of the overall structure of an extruder for a vacuum device at the inlet of an extruder, as proposed in this utility model.

[0016] Figure 3 This is a connection diagram of the extruder and exhaust component for a vacuum device at the inlet of an extruder, as proposed in this utility model.

[0017] Figure 4This is a main sectional view of the overall structure of the exhaust component for the vacuum device at the inlet of an extruder, as proposed in this utility model.

[0018] Figure 5 This utility model proposes a vacuum device for the inlet of an extruder. Figure 1 Enlarged view of the structure at point A in the middle;

[0019] Figure 6 This is a main sectional view of the overall structure of the cylinder for a vacuum pumping device at the inlet of an extruder, as proposed in this utility model.

[0020] Figure 7 This is a side sectional view of the overall structure of the cylinder of a vacuum device for the inlet of an extruder, as proposed in this utility model.

[0021] Figure 8 This utility model proposes a vacuum device for the inlet of an extruder. Figure 6 Enlarged view of the structure at point B in the middle.

[0022] Legend:

[0023] 1. Base; 2. Vacuum pump; 3. Air pipe; 4. Column; 5. Drive motor; 6. Extruder; 7. Hopper; 8. Sealing plug; 9. Support plate; 10. Stirring shaft; 11. Collection groove; 12. Push block; 13. First electric push rod; 14. Guide plate; 15. Rotating shaft; 16. Second electric push rod; 17. Groove; 18. Cylinder; 19. Stirring block; 20. Guide groove; 21. Internally threaded pipe; 22. Bolt; 23. Support ring; 24. Sealing plate; 25. Connecting rod; 26. Threaded groove; 27. Sealing groove; 28. Limiting groove; 29. ​​Limiting block; 30. Slider; 31. Slide groove; 32. Spring. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1 to 8This utility model provides a vacuum device for the inlet of an extruder: it includes a base 1, two columns 4 are symmetrically fixed on the top surface of the base 1, an extruder 6 is fixed on the top surface of the two columns 4, an extruder 6 is rotatably connected inside the extruder 6, an exhaust device is fixedly connected to the end of the extruder 6, a hopper 7 is vertically fixed on the top surface of the extruder 6, a sealing plug 8 is threadedly connected inside the hopper 7, a vacuum device is fixedly connected to the outside of the extruder 6, the vacuum device is fixed on the top surface of the base 1, a pressure sensor is fixedly connected inside the extruder 6, and a pressure gauge electrically connected to the pressure sensor is horizontally fixed on the rear side of the extruder 6.

[0026] The extrusion includes a guide plate 14 rotatably connected inside the extruder 6, a drive motor 5 horizontally fixed outside the extruder 6, a drive shaft 15 connected to the output end of the drive motor 5, the shaft 15 rotatably passes through the extruder 6 and is fixedly connected to the guide plate 14, a first electric push rod 13 is horizontally fixed inside the guide plate 14, a push block 12 is fixedly connected to the end of the first electric push rod 13, a groove 17 is provided at the end of the push block 12, and an exhaust component is fixed in the groove 17.

[0027] The exhaust component includes a second electric push rod 16 fixedly embedded in the center of the groove 17. The end of the second electric push rod 16 is fixedly connected to the support plate 9. The groove 17 is provided with a plurality of equidistant annular arrays of storage slots 11. A stirring shaft 10 is slidably inserted in each storage slot 11. The plurality of stirring shafts 10 are horizontally fixed to the support plate 9. A plurality of equidistant arrays of stirring blocks 19 are symmetrically fixed to the outer edge of each stirring shaft 10. The inner wall of each storage slot 11 is provided with two guide slots 20 symmetrically. The guide slots 20 are adapted to the plurality of stirring blocks 19.

[0028] The vacuum component includes a vacuum pump 2 fixed on the top surface of the base 1, an air pipe 3 fixedly connected to the end of the vacuum pump 2, a cylinder 18 fixedly connected to the end of the air pipe 3, a cylinder 18 fixedly connected to and communicating with an extruder 6, a sealing component slidably connected inside the cylinder 18, and a limiting component rotatably passing through the outside of the cylinder 18.

[0029] The sealing element includes a support ring 23 suspended and fixed inside the cylinder 18. A sealing groove 27 is concentrically formed on the top surface of the support ring 23. Two limiting grooves 28 are symmetrically arranged in the sealing groove 27. A limiting block 29 is slidably connected in each limiting groove 28. The top surfaces of the two limiting blocks 29 are used to fix a sealing plate 24. The sealing plate 24 abuts against the sealing groove 27. A sliding groove 31 is provided in each limiting groove 28. A slider 30 is slidably connected in each sliding groove 31. The slider 30 is fixedly connected to the limiting block 29. A spring 32 is fixedly connected between the inner wall of the sliding groove 31 and the slider 30. The limiting element is threadedly connected to the sealing plate 24.

[0030] The sealing element includes a connecting rod 25 concentrically fixed to the top surface of the sealing plate 24. The outer edge of the connecting rod 25 is provided with a threaded groove 26. The side of the cylinder 18 is horizontally fixed with an internally threaded pipe 21. A bolt 22 passes through the internal thread of the internally threaded pipe 21. The bolt 22 rotates through the cylinder 18 and is threaded in the threaded groove 26.

[0031] By rotating the extruder inside the extruder 6, fixing the exhaust component at the end of the extruder, and connecting the vacuum component outside the extruder 6, the gas in the raw material inside the extruder 6 is stirred and exhausted, avoiding the residual gas and air bubbles in the raw material from affecting the quality of the extruded plastic, thereby improving the quality of the plastic extruded by the extruder 6.

[0032] Working principle: In use, open the sealing plug 8 and feed the raw material into the extruder 6 through the hopper 7. Then, install the sealing plug 8 back onto the top surface of the hopper 7. Next, rotate the bolt 22 so that the bolt 22 leaves the threaded groove 26 in the connecting rod 25, separating the bolt 22 from the connecting rod 25 and releasing the limiting position of the connecting rod 25. Then, the second electric push rod 16 pushes the support plate 9 out of the groove 17 in the push block 12. At the same time, the stirring shaft 10 and the stirring block 19 leave the receiving groove 11. Then, start the vacuum pump 2, which extracts the air from the extruder 6. During extraction, the sealing plate 24 rises under the negative pressure suction of the vacuum pump 2 and the air pipe 3. At the same time, the spring 32 is compressed, causing the sealing plate 24 to leave the sealing groove 27, connecting the extruder 6 with the vacuum pump 2. Simultaneously, the drive motor 5 drives the rotating shaft 15 to rotate. The rotating shaft 15 drives the push block 12 through the guide plate 14. The rotating shaft 10 and the stirring block 19 agitate the raw material inside the extruder 6, expelling gas from the raw material and breaking bubbles. The expelled gas is discharged through the vacuum pump 2. At the same time, the pressure sensor detects the pressure inside the extruder 6 and displays the pressure through the pressure gauge. When the pressure gauge shows that the extruder 6 is in a vacuum state, the vacuum pump 2 is turned off. After the suction force on the sealing plate 24 disappears, the spring 32, which is in a compressed state, returns to its original position. As the spring 32 returns to its original position, the sealing plate 24 descends and returns to the sealing groove 27. Then, the bolt 22 is rotated so that it is screwed into the threaded groove 26 on the side of the connecting rod 25 to limit and fix the sealing plate 24. Then, the drive motor 5 stops. Next, the second electric push rod 16 retracts the support plate 9, the stirring shaft 10, and the stirring block 19. Then, the first electric push rod 13 pushes the push block 12 to extrude.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum device for the inlet of an extruder, comprising a base (1), characterized in that: Two columns (4) are symmetrically fixed on the top surface of the base (1). The top surfaces of the two columns (4) are jointly fixed to the extruder (6). An extruder (6) is rotatably connected inside the extruder (6). An exhaust device is fixedly connected to the end of the extruder. A hopper (7) is vertically fixed on the top surface of the extruder (6). A sealing plug (8) is threaded inside the hopper (7). A vacuum device is fixedly connected to the outside of the extruder (6). The vacuum device is fixed to the top surface of the base (1).

2. The vacuum device for the inlet of an extruder according to claim 1, characterized in that: The extruder includes a guide plate (14) rotatably connected inside the extruder (6). A drive motor (5) is horizontally fixed outside the extruder (6). The output end of the drive motor (5) is connected to a rotating shaft (15). The rotating shaft (15) rotatably passes through the extruder (6) and is fixedly connected to the guide plate (14). A first electric push rod (13) is horizontally fixed inside the guide plate (14). A push block (12) is fixedly connected to the end of the first electric push rod (13). A groove (17) is provided at the end of the push block (12). The exhaust component is fixed in the groove (17).

3. A vacuum device for the inlet of an extruder according to claim 2, characterized in that: The exhaust component includes a second electric push rod (16) fixedly embedded in the center of the groove (17). The end of the second electric push rod (16) is fixedly connected to a support plate (9). The groove (17) is provided with a plurality of equidistant annular arrays of storage slots (11). Each storage slot (11) is slidably inserted with a stirring shaft (10). The plurality of stirring shafts (10) are horizontally fixed to the support plate (9).

4. A vacuum device for the inlet of an extruder according to claim 3, characterized in that: Each stirring shaft (10) has multiple equidistantly arranged stirring blocks (19) symmetrically fixed on its outer edge. Each receiving groove (11) has two guide grooves (20) symmetrically arranged on its inner wall. The guide grooves (20) are adapted to the multiple stirring blocks (19).

5. A vacuum device for the inlet of an extruder according to claim 1, characterized in that: The vacuum component includes a vacuum pump (2) fixed on the top surface of the base (1), a gas pipe (3) fixedly connected to the end of the vacuum pump (2), a cylinder (18) fixedly connected to the end of the gas pipe (3), the cylinder (18) fixedly connected to the extruder (6) and communicating with the extruder (6), a sealing element slidably connected inside the cylinder (18), and a limiting element rotating through the outside of the cylinder (18).

6. A vacuum device for the inlet of an extruder according to claim 5, characterized in that: The sealing element includes a support ring (23) suspended and fixed inside the cylinder (18). A sealing groove (27) is concentrically opened on the top surface of the support ring (23). Two limiting grooves (28) are symmetrically arranged in the sealing groove (27). A limiting block (29) is slidably connected in each limiting groove (28). The top surfaces of the two limiting blocks (29) are jointly fixed to a sealing plate (24). The sealing plate (24) abuts against the sealing groove (27). A sliding groove (31) is provided in each limiting groove (28). A slider (30) is slidably connected in each sliding groove (31). The slider (30) is fixedly connected to the limiting block (29). A spring (32) is fixedly connected between the inner wall of the sliding groove (31) and the slider (30). The limiting element is threadedly connected to the sealing plate (24).

7. A vacuum device for the inlet of an extruder according to claim 6, characterized in that: The sealing element includes a connecting rod (25) concentrically fixed to the top surface of the sealing plate (24). The outer edge of the connecting rod (25) is provided with a threaded groove (26). An internally threaded tube (21) is horizontally fixed to the side of the cylinder (18). A bolt (22) is threaded through the internal thread of the internally threaded tube (21). The bolt (22) rotates through the cylinder (18) and is threadedly connected in the threaded groove (26).

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