Cooling screw extruder

Abstract

The present invention relates to the technical field of extruders, and proposes a cooling screw extruder, comprising a frame; a barrel mounted on the frame; a screw rotatably mounted within the barrel, fed by a feeding mechanism mounted on the frame, and then driven by a driving member mounted on the frame to rotate and transfer the material; the extruder is characterized in that it further comprises a stirring rod mounted on the barrel wall, wherein the axis of the stirring rod is not parallel to the axis of rotation of the screw, and the end of the stirring rod protrudes from the inner wall of the barrel near the screw. The above technical solution solves the problem of slow cooling in the prior art that affects production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of extruders, in particular to a cooling screw extruder. Background Art

[0002] Screw extruders primarily consist of a screw, barrel, die, feeding mechanism, and transmission. Depending on the number of screws within the extruder, they are categorized as single-screw or twin-screw extruders, both used to extrude semi-finished and finished rubber products. Molten rubber enters the extruder through the feeding mechanism. The screw's squeezing, shearing, and stirring actions rapidly cool the material in the barrel from a high-temperature melt to a low-temperature melt. Simultaneously, the screw propels the melt, which has reached production requirements, to the die head, completing subsequent production.

[0003] Existing single-screw extruders contain a screw surrounded by a barrel, which rotates within the barrel. Due to the limited space between the screw and barrel, as the high-temperature melt enters the extruder and is transported backward, the layer of melt immediately adjacent to the barrel cools down faster, leading to the formation of surface solidification patches. During downward transport, these patches cover the portion of the high-temperature melt that needs to be cooled, resulting in slow and prolonged cooling, which in turn affects production efficiency. Summary of the Invention

[0004] The present invention provides a cooling screw extruder, which solves the problem in the prior art of slow cooling and affecting production efficiency.

[0005] The technical solution of the present invention is as follows: a cooling screw extruder comprising

[0006] frame;

[0007] a barrel, arranged on the frame;

[0008] A screw is rotatably arranged in the barrel, is fed by a feeding mechanism arranged on the frame, and is then driven by a driving member arranged on the frame to rotate and transfer the material;

[0009] It is characterized by also including

[0010] A stirring rod is arranged on the barrel wall, and the axis direction of the stirring rod is not parallel to the rotation axis of the screw, and one end of the stirring rod close to the screw protrudes from the inner wall of the barrel.

[0011] As a further technical solution, a plug hole is opened on the barrel wall, and the stirring rod is plugged into the plug hole.

[0012] As a further technical solution, one end of the stirring rod extending out of the outer wall of the barrel has an external thread structure, and the stirring rod is threadedly connected to the barrel, further comprising

[0013] A nut, threadedly connected to the stirring rod,

[0014] A gasket is sleeved on the stirring rod, and the gasket is located between the nut and the outer wall of the barrel.

[0015] As a further technical solution, a cooling component is provided on the stirring rod, and the stirring rod has a water inlet channel and a water injection channel. The water inlet channel has a water inlet at the end away from the screw, and the water injection channel has a water injection port at the end away from the screw. The water injection channel has a cleaning port at the end close to the screw. The water inlet and the water outlet are both connected to a water inlet pump, and an interlayer channel is provided between the water inlet channel and the water injection channel. A drain port is provided on the side wall of the water injection channel, and a water pump is connected to the drain port.

[0016] The cooling component includes

[0017] A partition is slidably arranged in the interlayer channel,

[0018] A water control member is rotatably arranged on the partition, and magnetic strips are arranged on both sides of the water control member and the end surface of the stirring rod; after rotation, the water control member cover is arranged on the water inlet or the water injection port, and when the cover is arranged on the water injection port, the water inlet channel and the water injection channel are connected; when the cover is arranged on the water inlet, the partition slides in the interlayer channel to block the connection between the water inlet channel and the water injection channel; the water control member and the stirring rod are connected by magnetic adsorption.

[0019] The water baffle is rotatably arranged on the stirring rod, covers the cleaning port, and is connected to the stirring rod through magnetic adsorption.

[0020] As a further technical solution, the water control member includes

[0021] The outer plate is rotatably arranged on the partition, and the upper and lower side walls of the outer plate are provided with limiting grooves, and the two opposite side walls of the outer plate are provided with magnetic strips, which are magnetically adsorbed with the stirring rod.

[0022] The inner plate is slidably arranged on the outer plate. The inner plate and the outer plate cover are arranged on the water inlet. The two opposite side walls of the inner plate are provided with magnetic strips, which are magnetically adsorbed with the stirring rod.

[0023] A sealing strip is provided on the stirring rod and is used to fill the gap between the water control member and the stirring rod.

[0024] A limiting member is provided on the inner plate, the limiting member is inserted into the limiting groove and slides in the limiting groove.

[0025] After the inner plate and the outer plate are both covered on the water injection port, the limit member is located in the limit groove on the side close to the rotation axis of the outer plate; the end of the stirring rod close to the screw has a sealing groove, and after the inner plate is covered on the water inlet, the outer plate is inserted into the interlayer channel, and the partition is slidably inserted into the sealing groove, and the partition blocks the water inlet channel and the water injection channel, and the limit member is located in the limit groove on the side away from the rotation axis of the outer plate, and the inner plate is rotatably arranged on the outer plate.

[0026] As a further technical solution, a cover plate is provided on the inner wall of the water injection port, and the cover plate is rotatably provided on the stirring rod. After water enters the water injection port, the cover plate covers the drainage hole.

[0027] As a further technical solution, the stirring rods are provided in multiple groups, and the stirring rods in each group are evenly arranged along the axial direction and distributed along the circumferential direction.

[0028] As a further technical solution, each group of stirring rods is arranged at an angle of 90 degrees along the circumferential direction.

[0029] The working principle and beneficial effects of the present invention are:

[0030] Existing screw extruders have problems such as the barrel having an unsatisfactory cooling effect on the melt in the barrel, high equipment manufacturing costs, and low production efficiency. Therefore, the cooling screw extruder of the present invention solves the above problems.

[0031] When the screw extruder of the present technical solution is used for cooling, the operator first transfers the molten material to the screw in the barrel through the feeding mechanism, and then transfers it to the extruder outlet through the screw. During the transfer process, the material contacts the barrel wall and cools down, resulting in solidified patches on the surface. At this time, under the push of the screw and the stirring rod constantly inserted into the material, the semi-solidified melt and the solidified melt are displaced from each other, that is, the molten part inside moves to the outside, and the solidified melt also moves to the inside. This exchange is constantly carried out in the barrel. As time goes by, the more the screw pushes and extrude forward, the lower the barrel temperature, and the greater the extrusion force. At this time, the melt in the barrel is converted from a high-temperature molten state to a low-temperature molten state until it passes through the die head to fully meet the specifications of the required molded plate without defects such as deformation.

[0032] The cooling screw extruder adopting this solution shortens the cooling time and thus improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 It is a schematic cross-sectional view of the structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of some parts of the present invention showing the arrangement of the stirring rod;

[0036] Figure 3 This is a schematic diagram showing the structure of some parts of the stirring rod of the present invention;

[0037] Figure 4 This is a schematic diagram showing the structure of some parts of the stirring rod of the present invention;

[0038] Figure 5 This is a schematic diagram showing the structure of some parts of the cooling assembly of the present invention;

[0039] Figure 6 This is a schematic diagram showing the structure of some parts of the position limiting member of the present invention;

[0040] Figure 7 This is a schematic structural diagram of some parts showing the water injection channel of the present invention;

[0041] Figure 8 This is a schematic diagram showing the structure of some parts of the sealing groove of the present invention;

[0042] Figure 9 This is a schematic diagram of some parts showing the connection structure between the water inlet channel and the water injection channel of the present invention;

[0043] Figure 10 This is a schematic diagram showing the structure of some parts of the drain outlet of the present invention.

[0044] In the figure: 1. Frame; 2. Barrel; 3. Screw; 4. Agitator; 41. Cooling assembly; 5. Connecting hole; 6. Nut; 7. Gasket; 8. Water inlet; 9. Water injection port; 10. Drain port; 11. Partition; 12. Water inlet channel; 13. Water control part; 14. Magnetic strip; 15. Cleaning port; 16. Water baffle; 17. Outer plate; 18. Limiting groove; 19. Inner plate; 20. Sealing strip; 21. Limiting part; 22. Sealing groove; 23. Cover plate; 24. Water injection channel; 25. Interlayer channel. DETAILED DESCRIPTION

[0045] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0046] like Figures 1 to 10 As shown, this embodiment proposes a cooling screw extruder, comprising

[0047] Rack 1;

[0048] A barrel 2 is provided on the frame 1;

[0049] The screw 3 is rotatably arranged in the barrel 2, and is fed by the feeding mechanism arranged on the frame 1, and then the driving member arranged on the frame 1 drives the screw 3 to rotate and transfer the material;

[0050] It is characterized by also including

[0051] The stirring rod 4 is arranged on the wall of the barrel 2, and the axis direction of the stirring rod 4 is not parallel to the rotation axis of the screw 3, and the end of the stirring rod 4 close to the screw 3 extends out of the inner wall of the barrel 2.

[0052] In this embodiment, when the screw extruder of the present technical solution is used for cooling, the operator first transfers the molten material to the screw 3 in the barrel 2 through the feeding mechanism, and then transfers it to the extruder outlet via the screw 3. During the transfer process, the material contacts the barrel wall and cools down, resulting in the appearance of surface solidification patches. At this time, under the push of the screw 3 and the stirring rod 4 continuously inserted into the material, the semi-solidified melt and the solidified melt are displaced from each other, that is, the molten part inside is moved to the outside, and the solidified melt is also moved to the inside. This exchange is constantly carried out in the barrel 2. As time goes by, the more the screw 3 pushes the extruder forward, the lower the temperature of the barrel 2 is, and the greater the extrusion force is. At this time, the molten material in the barrel is converted from a high-temperature molten state to a low-temperature molten state until it passes through the die head to fully meet the specifications of the required molded plate and without defects such as deformation.

[0053] The cooling screw extruder adopting this solution shortens the cooling time and thus improves production efficiency.

[0054] Furthermore, a plug hole 5 is opened on the wall of the barrel 2, and the stirring rod 4 is plugged into the plug hole 5.

[0055] Furthermore, one end of the stirring rod 4 extending out of the outer wall of the barrel 2 has an external thread structure, and the stirring rod 4 is threadedly connected to the barrel 2, and further includes

[0056] Nut 6 is threadedly connected to the stirring rod 4.

[0057] The gasket 7 is sleeved on the stirring rod 4 and is located between the nut 6 and the outer wall of the barrel 2.

[0058] In this embodiment, the stirring rod 4 is detachably connected to the barrel 2 , which facilitates the inspection and replacement of the stirring rod 4 and improves the convenience of use of the stirring rod 4 .

[0059] Furthermore, a cooling component 41 is provided on the stirring rod 4. The stirring rod 4 has a water inlet channel 12 and a water injection channel 24. The water inlet channel 12 has a water inlet 8 at the end away from the screw 3. The water injection channel 24 has a water injection port 9 at the end away from the screw 3. The water injection channel 24 has a cleaning port 15 at the end close to the screw 3. The water inlet 8 and the water injection port 9 are both connected to a water inlet pump, and an interlayer channel 25 is provided between the water inlet channel 12 and the water injection channel 24. A drain port 10 is provided on the side wall of the water injection channel 24, and a water pump is connected to the drain port 10.

[0060] The cooling component 41 includes

[0061] The partition 11 is slidably arranged in the interlayer channel 25.

[0062] The water control member 13 is rotatably arranged on the partition 11, and magnetic strips 14 are provided on both sides of the water control member 13 and the end surface of the stirring rod 4; after rotation, the water control member 13 is covered on the water inlet 8 or the water injection port 9. When the cover is set on the water injection port 9, the water inlet channel 12 and the water injection channel 24 are connected; when the cover is set on the water inlet 8, the partition 11 slides in the interlayer channel 25 to block the connection between the water inlet channel 12 and the water injection channel 24; the water control member 13 and the stirring rod 4 are magnetically adsorbed and connected.

[0063] The water baffle 16 is rotatably mounted on the stirring rod 4 , covers the cleaning port 15 , and is connected to the stirring rod 4 through magnetic attraction.

[0064] Furthermore, the water control member 13 includes

[0065] The outer plate 17 is rotatably mounted on the partition 11. The upper and lower side walls of the outer plate 17 are provided with limit slots 18. The two opposite side walls of the outer plate 17 are provided with magnetic strips 14, which are magnetically attracted to the stirring rod 4.

[0066] The inner plate 19 is slidably arranged on the outer plate 17. The inner plate 19 and the outer plate 17 are covered on the water inlet 9. The two opposite side walls of the inner plate 19 are provided with magnetic strips 14, which are magnetically adsorbed with the stirring rod 4.

[0067] The sealing strip 20 is provided on the stirring rod 4 and is used to fill the gap between the water control member 13 and the stirring rod 4.

[0068] The limiting member 21 is provided on the inner plate 19 and is inserted into the limiting groove 18 and slides in the limiting groove 18.

[0069] After the inner plate 19 and the outer plate 17 are both covered on the water inlet 9, the limit member 21 is located in the limit groove 18 on the side close to the rotation axis of the outer plate 17; the end of the stirring rod 4 close to the screw 3 has a sealing groove 22. After the inner plate 19 is covered on the water inlet 8, the outer plate 17 is inserted into the interlayer channel 25, and the partition 11 is slidably inserted into the sealing groove 22. The partition 11 blocks the water inlet channel 12 and the water injection channel 24. The limit member 21 is located in the limit groove 18 on the side away from the rotation axis of the outer plate 17, and the inner plate 19 is rotatably set on the outer plate 17.

[0070] Furthermore, a cover plate 23 is provided on the inner wall of the water injection port 9 , and the cover plate 23 is rotatably provided on the stirring rod 4 , and after water enters the water injection port 9 , the cover plate 23 covers the drainage hole.

[0071] In this embodiment, when the stirring rod 4 is required to play a cooling role, the operator only needs to start the water inlet pump and the water pump. At this time, the water control part 13 is adsorbed on the cover of the magnetic strip 14 and is arranged at the water inlet 9. The water put into the water inlet pump enters from the water inlet 8, flows through the water inlet channel 12 to the end of the stirring rod 4 close to the screw 3, and then bypasses the interlayer channel 25 and flows through the water injection channel 24 to the drain 10. The magnetic force between the water baffle 16 and the stirring rod 4 is much greater than the pressure generated when the water flows through at this time, so the water baffle 16 will not be washed away. At this time, the cover 23 is opened, and the crystal drain port 10 is pumped away by the water pump. The water pump pumps the water into the water pool where the water inlet pump takes water, thereby realizing the cooling water circulation of the cooling device and greatly improving the cooling effect of the stirring rod 4.

[0072] When the stirring rod 4 is needed to play the role of water injection and cleaning, the operator only needs to rotate the outer plate 17 and slide the partition 11 and the outer plate 17 along the interlayer channel 25 until the outer plate 17 is completely placed in the interlayer channel 25. At this time, the end of the partition 11 away from the outer plate 17 is inserted into the sealing groove 22, achieving the effect of separating the water inlet channel 12 and the water injection channel 24. When the outer plate 17 slides in the interlayer channel 25, the limiter 21 receives the outer wall resistance of the interlayer channel 25 and slides along the limiter groove 18 in the direction away from the rotation axis of the outer plate 17. While the limiter 21 slides, it drives the inner plate 1 9 slides out of the outer plate 17, and a rotation groove is provided at one end of the outer plate 17 away from the partition 11, so that the inner plate 19 can be rotated to the water inlet 8, and is covered on the water inlet, and is connected to the water inlet 8 by magnetic adsorption of the magnetic strip 14. At this time, the water inlet pump is turned on, and the water flows into the water inlet 9. The cover plate 23 is pressurized and covered on the drain outlet 10. At this time, the water pressure is relatively large, and the water baffle 16 is flushed open by the water pressure, and water flows into the barrel 2 to realize the cleaning of the inside of the extruder. After cleaning, the stirring rod 4 can be removed until the water flows out, which greatly improves the practicality of the stirring rod 4 and the convenience of using the extruder.

[0073] Furthermore, multiple groups of stirring rods 4 are provided, and each group of stirring rods 4 is evenly arranged along the axial direction and distributed along the circumferential direction.

[0074] Furthermore, each group of stirring rods 4 is arranged at an angle of 90 degrees along the circumferential direction.

[0075] In this embodiment, when α is 90 degrees, this setting makes the material in the barrel 2 more fully stirred without wasting resources, further improving the environmental performance of the cooling screw extruder.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Cooling screw extruder, including Rack (1); A barrel (2) is arranged on the frame (1); A screw (3) is rotatably arranged in the barrel (2), and is fed by a feeding mechanism arranged on the frame (1), and then a driving member arranged on the frame (1) drives the screw (3) to rotate and transfer the material; It is characterized in that Also includes A stirring rod (4) is arranged on the wall of the barrel (2), and the axis direction of the stirring rod (4) is not parallel to the rotation axis of the screw (3), and the end of the stirring rod (4) close to the screw (3) protrudes from the inner wall of the barrel (2); The stirring rod (4) is provided with a cooling component (41), and the stirring rod (4) has a water inlet channel (12) and a water injection channel (24), the water inlet channel (12) has a water inlet (8) at the end away from the screw (3), the water injection channel (24) has a water injection port (9) at the end away from the screw (3), and the water injection channel (24) has a cleaning port (15) at the end close to the screw (3), the water inlet (8) and the water injection port (9) are both connected to a water inlet pump, and an interlayer channel (25) is provided between the water inlet channel (12) and the water injection channel (24), a drain port (10) is provided on the side wall of the water injection channel (24), and a water pump is connected to the drain port (10). The cooling component (41) includes A partition (11) is slidably disposed in the interlayer channel (25), A water control member (13) is rotatably mounted on the partition (11), and magnetic strips (14) are provided on both sides of the water control member (13) and on the end surface of the stirring rod (4); after rotation, the water control member (13) covers the water inlet (8) or the water injection port (9); when the cover is mounted on the water injection port (9), the water inlet channel (12) and the water injection channel (24) are connected; when the cover is mounted on the water inlet (8), the partition (11) slides in the interlayer channel (25) to block the connection between the water inlet channel (12) and the water injection channel (24); the water control member (13) and the stirring rod (4) are connected by magnetic adsorption. A water baffle (16) is rotatably mounted on the stirring rod (4), covers the cleaning port (15), and is connected to the stirring rod (4) via magnetic adsorption.

2. The cooling screw extruder according to claim 1, characterized in that The barrel (2) is provided with a plug hole (5) on its wall, and the stirring rod (4) is plugged into the plug hole (5).

3. The cooling screw extruder according to claim 1, characterized in that One end of the stirring rod (4) extending out of the outer wall of the barrel (2) has an external thread structure, and the stirring rod (4) is threadedly connected to the barrel (2). The nut (6) is threadedly connected to the stirring rod (4). A gasket (7) is sleeved on the stirring rod (4), and the gasket (7) is located between the nut (6) and the outer wall of the barrel (2).

4. The cooling screw extruder according to claim 1, characterized in that The water control member (13) includes The outer plate (17) is rotatably mounted on the partition (11), and the upper and lower side walls of the outer plate (17) are provided with limiting grooves (18). The two opposite side walls of the outer plate (17) are provided with magnetic strips (14) that are magnetically adsorbed with the stirring rod (4). The inner plate (19) is slidably arranged on the outer plate (17), and the inner plate (19) and the outer plate (17) are covered on the water inlet (9). The two opposite side walls of the inner plate (19) are provided with magnetic strips (14) that are magnetically adsorbed with the stirring rod (4). A sealing strip (20) is provided on the stirring rod (4) and is used to fill the gap between the water control member (13) and the stirring rod (4). A limiting member (21) is provided on the inner plate (19), and the limiting member (21) is inserted into the limiting groove (18) and slides in the limiting groove (18). After the inner plate (19) and the outer plate (17) are both covered on the water injection port (9), the limiting member (21) is located in the limiting groove (18) on the side close to the rotation axis of the outer plate (17); the end of the stirring rod (4) close to the screw (3) has a sealing groove (22); after the inner plate (19) is covered on the water inlet (8), the outer plate (17) is inserted into the interlayer channel (25), and the partition (11) is slidably inserted into the sealing groove (22). The partition (11) blocks the water inlet channel (12) and the water injection channel (24); the limiting member (21) is located in the limiting groove (18) on the side away from the rotation axis of the outer plate (17), and the inner plate (19) is rotatably arranged on the outer plate (17).

5. The cooling screw extruder according to claim 1, characterized in that A cover plate (23) is provided on the inner wall of the water injection port (9), and the cover plate (23) is rotatably arranged on the stirring rod (4). After water enters the water injection port (9), the cover plate (23) covers the drain port (10).

6. The cooling screw extruder according to claim 1, characterized in that The stirring rods (4) are provided in multiple groups, and the stirring rods (4) in each group are evenly arranged along the axis direction and distributed along the circumferential direction.

7. The cooling screw extruder according to claim 6, characterized in that Each group of stirring rods (4) is arranged at an angle of 90 degrees along the circumferential direction.

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