An adjustable structure for screw exhaust of a rubber extruder

Abstract

The present invention discloses an adjustable screw exhaust structure for a rubber extruder, including an equipment housing and an adjustment component; the adjustment component is connected to the equipment housing through a perforation; the adjustment component is composed of a first housing, a nut and a threaded pull rod; the nut is rotatably connected inside the first housing; by adding an adjustment groove to the inner wall on the basis of the existing cylinder body, and adding a card slot on the basis of the existing threaded rod structure and cooperating with the adjustment ring, when the threaded rod is driven by the threaded pull rod to move back and forth, it drives the displacement change between the adjustment ring and the adjustment groove, thereby changing the gap size between the adjustment groove and the adjustment ring. When the rubber passes through the gap between the adjustment groove and the adjustment ring, it will be squeezed and compressed into a thin sheet, achieving the purpose of squeezing out the water vapor inside the rubber. Further, an externally connected vacuum pump is used to discharge the squeezed water vapor, avoiding the generation of air holes inside the finished rubber product during vulcanization molding and affecting its physical strength.

Description

Technical Field

[0001] The present invention relates to the technical field of screw extruders, and specifically to an adjustable screw exhaust structure for a rubber extruder. Background Art

[0002] With the rapid development of China's rubber industry, the design and manufacturing level of China's rubber mixing equipment has reached the level of the late 1990s abroad, which can fully meet the needs of the domestic tire manufacturing industry. At present, except for super-large-size internal mixers in newly built tire factories in China, other open mills, internal mixers, extrusion calenders, etc. basically choose domestic equipment; in addition, China's rubber mixing equipment is also exported in batches. Rubber mixing equipment is an indispensable key equipment in the production of tires and other rubber products, and its performance level determines the quality of rubber mixing. Among rubber mixing equipment, open mills, internal mixers and supporting downstream auxiliary machines are the most commonly used. Among them, the extrusion calender system, as an important part of the entire production line, has very strict requirements for its pressure and speed control.

[0003] At present, in the prior art, after rubber raw materials enter the feeding port of the extruder, air is mixed during the screw stirring process. After continuous stirring and conveying by the screw, the air is compressed into the rubber inside the conveying section of the screw, resulting in poor density of the rubber. Moreover, the moisture absorbed by the raw materials themselves and the moisture in the air entering during feeding and stirring absorb heat when the rubber is vulcanized and shaped, and the water vapor is vaporized to generate pores, further causing a decrease in the physical strength and appearance defects of rubber products.

[0004] Therefore, in view of the above problems, an adjustable screw exhaust structure for a rubber extruder is proposed. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, after rubber raw materials enter the feeding port of the extruder, air is mixed during the screw stirring process. After continuous stirring and conveying by the screw, the air is compressed into the rubber inside the conveying section of the screw, resulting in poor density of the rubber. The present invention proposes an adjustable screw exhaust structure for a rubber extruder.

[0006] An adjustable screw exhaust structure for a rubber extruder includes an equipment housing and an adjustment assembly; the adjustment assembly is connected to the equipment housing through a hole.

[0007] The adjusting component is composed of a first housing, a nut, and a threaded pull rod; the nut is rotatably connected inside the first housing; the threaded pull rod is threadedly and rotatably connected inside the nut; the other end of the threaded pull rod is rotatably connected inside the equipment housing; a first cavity is provided inside the first housing; the nut is rotatably connected in the first cavity; a first bearing and a second bearing are respectively fixedly connected to the side wall of the first cavity; the second bearing is arranged between adjacent first bearings; the outer side wall of the nut is fixedly connected to the inner side walls of the first bearing and the second bearing; the threaded pull rod inside it is driven to rotate threadedly by the thread. Since the nut is limited inside the first housing, when the nut rotates, the threaded pull rod will move horizontally inwards or outwards along with the rotation direction of the nut. Therefore, when the threaded pull rod moves, because the other end of it fits and connects with the threaded rod, it can drive the threaded rod to move horizontally inside the cylinder, realizing the function of adjusting the position of the threaded rod inside the cylinder.

[0008] Preferably, a transmission component is provided at the bottom end of the equipment housing; a connection cavity is provided inside the equipment housing; the other end of the threaded pull rod is rotatably connected inside the connection cavity; a threaded rod is rotatably connected inside the connection cavity; a clamping groove is provided in the middle of the threaded rod; a fitting hole is provided at one end of the threaded rod located inside the connection cavity; the other end of the threaded pull rod fits and connects inside the fitting hole; an adjusting ring is sleeved on the clamping groove; the threaded rod drives the adjusting ring in the middle of it to change positions with the adjusting groove inside the cylinder, thereby changing the size of the gap between the adjusting ring and the adjusting groove. When the rubber passes through the gap between the adjusting groove and the adjusting ring, since the gap between the adjusting ring and the adjusting groove can change under the drive of the adjusting component, the function of adjusting the passing rate of the rubber is realized. And when adjustment is not needed, the threaded pull rod is rotated backward to disengage it from the threaded rod.

[0009] Preferably, a machine head flange is fixedly connected to one end of the equipment housing; the other end of the machine head flange is fixedly connected to a cylinder; the machine head flange is used to connect the equipment housing and the cylinder, and a rubber pad is also provided at the connection between the machine head flange and the cylinder, which can effectively improve the connection tightness between the machine head flange and the cylinder.

[0010] Preferably, a connection flange is fixedly connected between adjacent cylinders; a rubber pad is provided between adjacent connection flanges; a feeding hopper is communicated with one end of the cylinder close to the equipment housing; a discharge seat is fixedly connected to the end of the cylinder far from the equipment housing; the rubber pad is used for waterproofing and can improve the connection tightness between adjacent cylinders to a certain extent. The feeding hopper communicated with the cylinder close to the equipment housing is used to add rubber material, and the cylinder far from the equipment housing is fixedly connected with a discharge seat.

[0011] Preferably, a second cavity is provided inside the cylinder body; the main body of the threaded rod is arranged inside the second cavity; a water injection pipe is connected to the bottom end of the middle part of the cylinder body; an adjustment groove is provided on the inner wall of the cylinder body near the right side of the water injection pipe; a water injection pipe is arranged at the bottom of a section of the cylinder body for injecting water into it regularly, and the adjustment groove provided on the inner wall of the cylinder body on the right side of the water injection pipe is similar in structure to the adjustment ring.

[0012] Preferably, the position of the card slot on the threaded rod is correspondingly arranged in the adjustment groove; the adjustment ring rotates correspondingly in the adjustment groove; with the adjustment of the adjustment component, the gap between the adjustment ring and the adjustment groove can be changed. Specifically, when the threaded rod moves to the left, the gap between the adjustment ring and the adjustment groove shrinks. Therefore, the rate at which the raw material passes through the gap between the adjustment groove and the adjustment ring decreases correspondingly. On the contrary, the rate at which the raw material passes through the gap between the adjustment groove and the adjustment ring increases. Thus, through the adjustment of the adjustment component, the rate of extrusion of the raw material can be adjusted.

[0013] Preferably, the inside of the discharge seat is hollow; the inside of the discharge seat communicates with the second cavity; the front end of the discharge seat is fitted and connected with an orifice plate; the inside of the discharge seat is hollow and communicates with the second cavity closest to the inside of the cylinder body. When the raw material passes through the adjustment groove, it is extruded through the orifice plate provided at the front end of the discharge seat, and rubber strips of various sizes can be extruded according to the opening size of the orifice plate.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. On the basis of the existing cylinder body, the present invention adds an adjustment groove to its inner wall, and adds a card slot to the structure of the existing threaded rod, and cooperates with the adjustment ring. When the threaded rod is driven by the threaded pull rod to move back and forth, it drives the displacement change between the adjustment ring and the adjustment groove, thereby changing the size of the gap between the adjustment groove and the adjustment ring. When the rubber passes through the gap between the adjustment groove and the adjustment ring, it will be squeezed and compressed into a thin sheet, realizing the purpose of squeezing out the water vapor inside the rubber. Further, the externally connected vacuum pump is used to discharge the squeezed water vapor, avoiding the generation of air holes inside the finished rubber product during vulcanization molding, which affects its physical strength.

[0016] 2. By setting the adjustment component, when an external force acts on the nut, the nut rotates inside the first housing. The rotation of the nut indirectly drives the threaded pull rod to have a relative threaded rotation with it. Since the nut is limited inside the first housing, the threaded pull rod can move inward or outward with the change of the rotation direction of the nut. The inward or outward movement of the threaded pull rod indirectly drives the threaded rod to move, thereby realizing the function of driving the internal threaded rod to move back and forth by the external adjustment component for adjustment, realizing the function of changing the position between the adjustment ring and the adjustment groove, and further changing the rubber passing rate and the size of the passing gap. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Is a perspective view of an embodiment of the present invention;

[0019] Figure 2 Is a first cross-sectional view of an embodiment of the present invention;

[0020] Figure 3 Is a second cross-sectional view of an embodiment of the present invention;

[0021] Figure 4 Is a perspective view of the threaded rod in an embodiment of the present invention;

[0022] Figure 5 Is a perspective view of the adjusting ring in an embodiment of the present invention;

[0023] Figure 6 Is Figure 2 An enlarged schematic view of the structure of part A of;

[0024] Figure 7 Is Figure 3 An enlarged schematic view of the structure of part B of.

[0025] In the figure: 1, equipment housing; 11, transmission component; 12, connection cavity; 13, head flange; 2, adjusting component; 21, first housing; 22, first bearing; 23, second bearing; 24, nut; 25, threaded pull rod; 26, first cavity; 3, feeding hopper; 4, cylinder body; 41, connection flange; 42, discharge seat; 43, water injection pipe; 44, second cavity; 441, adjusting groove; 45, orifice plate; 46, rubber pad; 5, threaded rod; 51, card slot; 52, fitting hole; 53, adjusting ring. Detailed Embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Please refer to Figures 1-7As shown in the figure, an adjustable screw exhaust structure of a rubber extruder includes a device housing 1 and an adjustment assembly 2; the adjustment assembly 2 is connected to the device housing 1 through a perforation.

[0028] The adjustment assembly 2 consists of a first housing 21, a nut 24, and a threaded rod 25; the nut 24 is rotatably connected inside the first housing 21; the threaded rod 25 is threadedly and rotatably connected inside the nut 24; the other end of the threaded rod 25 is rotatably connected inside the device housing 1; a first cavity 26 is provided inside the first housing 21; the nut 24 is rotatably connected to the first cavity 26; a first bearing 22 and a second bearing 23 are respectively fixedly connected to the side wall of the first cavity 26; the second bearing 23 is arranged between adjacent first bearings 22; the outer side wall of the nut 24 is fixedly connected to the inner side walls of the first bearing 22 and the second bearing 23.

[0029] During operation, an external instrument is used to rotate the adjustment assembly 2 provided outside the device housing 1, specifically, the nut 24 is rotated. The outer end of the nut 24 protrudes from the first housing 21. Therefore, when the external instrument drives it to rotate, the nut 24 rotates relative to the first bearing 22 and the second bearing 23 inside the first housing 21. When the nut 24 rotates, it is limited by the first bearing 22 and the second bearing 23. When the nut 24 rotates, it will drive the threaded rod 25 inside it to rotate threadedly. Since the nut 24 is limited inside the first housing 21, when the nut 24 rotates, the threaded rod 25 will move horizontally inwards or outwards along with the rotation direction of the nut 24. Thus, when the threaded rod 25 moves, because the other end of it fits and connects to the threaded rod 5, it can drive the threaded rod 5 to move horizontally inside the cylinder 4, realizing the function of adjusting the position of the threaded rod 5 inside the cylinder 4.

[0030] As an implementation mode of the present invention, a transmission assembly 11 is provided at the bottom end of the device housing 1; a connection cavity 12 is provided inside the device housing 1; the other end of the threaded rod 25 is rotatably connected to the connection cavity 12; a threaded rod 5 is rotatably connected inside the connection cavity 12; a card slot 51 is provided in the middle of the threaded rod 5; a fitting hole 52 is provided at one end of the threaded rod 5 located inside the connection cavity 12; the other end of the threaded rod 25 fits and connects to the fitting hole 52; an adjustment ring 53 is sleeved on the card slot 51.

[0031] During operation, the other end of the threaded tie rod 25 is arranged inside the connection cavity 12 of the equipment housing 1, and the other end of the threaded rod 5 is also arranged inside the connection cavity 12 of the equipment housing 1. When it is necessary to adjust the position of the threaded rod 5, the threaded tie rod 25 squeezes the threaded rod 5 inward, causing the threaded rod 5 to drive the adjusting ring 53 in the middle of it to change its position relative to the adjusting groove 441 inside the cylinder body 4, thereby changing the size of the gap between the adjusting ring 53 and the adjusting groove 441. When the rubber passes through the gap between the adjusting groove 441 and the adjusting ring 53, since the gap between the adjusting ring 53 and the adjusting groove 441 can be changed under the drive of the adjusting assembly 2, the function of adjusting the passing rate of the rubber is realized.

[0032] As an implementation manner of the present invention, one end of the equipment housing 1 is fixedly connected with a machine head flange 13; the other end of the machine head flange 13 is fixedly connected with a cylinder body 4.

[0033] During operation, the machine head flange 13 is used to connect the equipment housing 1 and the cylinder body 4, and a rubber gasket 46 is also arranged at the connection between the machine head flange 13 and the cylinder body 4, which can effectively improve the connection tightness between the machine head flange 13 and the cylinder body 4.

[0034] As an implementation manner of the present invention, adjacent cylinder bodies 4 are fixedly connected with connection flanges 41; rubber gaskets 46 are arranged between the adjacent connection flanges 41; a feeding hopper 3 is communicated with one end of the cylinder body 4 close to the equipment housing 1; an outlet seat 42 is fixedly connected with the other end of the cylinder body 4 far from the equipment housing 1.

[0035] During operation, adjacent cylinder bodies 4 are connected through the connection flanges 41 and the rubber gaskets 46, where the rubber gaskets 46 are used for waterproofing and can improve the connection tightness between adjacent cylinder bodies 4 to a certain extent. The feeding hopper 3 communicated with the cylinder body 4 close to the equipment housing 1 is used to add rubber material, and the outlet seat 42 is fixedly connected to the cylinder body 4 at the end far from the equipment housing 1.

[0036] As an implementation manner of the present invention, a second cavity 44 is opened inside the cylinder body 4; the main body of the threaded rod 5 is arranged inside the second cavity 44; a water injection pipe 43 is communicated with the bottom end in the middle of the cylinder body 4; an adjusting groove 441 is opened at a position on the inner wall of the cylinder body 4 close to the right side of the water injection pipe 43.

[0037] During operation, adjacent cylinder bodies 4 are in a communicating state, and it is named the second cavity 44. During operation, the threaded rod 5 is arranged inside the second cavity 44 formed by adjacent cylinder bodies 4, and a water injection pipe 43 is arranged at the bottom of one section of the cylinder body 4 for regularly injecting water into it. The adjusting groove 441 opened on the inner wall of the cylinder body 4 on the right side of the water injection pipe 43 has a similar structure to the adjusting ring 53.

[0038] As an implementation manner of the present invention, the position of the card slot 51 on the threaded rod 5 is correspondingly arranged in the adjustment slot 441; the adjustment ring 53 correspondingly rotates in the adjustment slot 441.

[0039] During operation, since the card slot 51 on the threaded rod 5 is correspondingly arranged in the adjustment slot 441 on the inner wall of the cylinder body 4, and after the adjustment ring 53 is sleeved in the card slot 51, as the threaded rod 5 rotates, the raw material filled on one side of the second cavity 44 is extruded through the gap between the adjustment slot 441 and the adjustment ring 53 and reaches the other side of the second cavity 44. With the adjustment of the adjustment assembly 2, the gap between the adjustment ring 53 and the adjustment slot 441 can be changed. Specifically, when the threaded rod 5 moves to the left, the gap between the adjustment ring 53 and the adjustment slot 441 shrinks. Therefore, the rate at which the raw material passes through the gap between the adjustment slot 441 and the adjustment ring 53 decreases correspondingly. On the contrary, the rate at which the raw material passes through the gap between the adjustment slot 441 and the adjustment ring 53 increases. Thus, through the adjustment of the adjustment assembly 2, the rate of extrusion of the raw material can be adjusted. And by setting an adjustment ring with an adjustable position, when a relative positional relationship is generated between it and the adjustment slot, the gap between the adjustment slot and the adjustment ring changes accordingly. When the rubber raw material passes through this position, it will be squeezed and compressed into a thin sheet. At this time, the moisture and water vapor contained in the rubber raw material will be extruded and extracted by an external vacuum extraction device arranged at a position adjacent to the adjustment slot, so as to discharge the moisture and water vapor in the rubber raw material before the rubber is vulcanized and formed, avoiding the presence of air bubbles in the produced and formed rubber raw material and affecting the physical strength of the rubber.

[0040] As an implementation manner of the present invention, the inside of the discharge seat 42 is hollow; the inside of the discharge seat 42 communicates with the second cavity 44; the front end of the discharge seat 42 is fitted and connected with an orifice plate 45.

[0041] During operation, the inside of the discharge seat 42 is hollow and communicates with the second cavity 44 closest to the inside of the cylinder body 4. When the raw material passes through the adjustment slot 441, it is extruded through the orifice plate 45 provided at the front end of the discharge seat 42, and rubber strips of various sizes can be extruded according to the opening size of the orifice plate 45.

[0042] Working principle: An external instrument is used to rotate the adjustment component 2 arranged outside the device housing 1, specifically, the nut 24 is rotated. The outer end of the nut 24 protrudes from the first housing 21. Therefore, when the external instrument drives it to rotate, the nut 24 rotates relative to the first bearing 22 and the second bearing 23 inside the first housing 21. When the nut 24 rotates, it is limited by the first bearing 22 and the second bearing 23. When the nut 24 rotates, it will drive the threaded rod 25 inside it to rotate threadedly. Since the nut 24 is limited within the first housing 21, when the nut 24 rotates, the threaded rod 25 will move horizontally inward or outward along with the rotation direction of the nut 24. Thus, when the threaded rod 25 moves, because the other end of it fits and connects to the threaded rod 5, it can drive the threaded rod 5 to move horizontally within the cylinder 4, realizing the function of adjusting the position of the threaded rod 5 within the cylinder 4. Specifically, when it is necessary to adjust the position of the threaded rod 5, the threaded rod 25 squeezes the threaded rod 5 inward, causing the threaded rod 5 to drive the adjustment ring 53 in the middle of it to change positions with the adjustment groove 441 inside the cylinder 4, thereby changing the size of the gap between the adjustment ring 53 and the adjustment groove 441. When the rubber passes through the gap between the adjustment groove 441 and the adjustment ring 53, since the gap between the adjustment ring 53 and the adjustment groove 441 can change under the drive of the adjustment component 2, the function of adjusting the passing rate of the rubber is realized. And because the card slot 51 on the threaded rod 5 is correspondingly arranged in the adjustment groove 441 on the inner wall of the cylinder 4, and after the adjustment ring 53 is sleeved in the card slot 51, as the threaded rod 5 rotates, the raw material filled on one side of the second cavity 44 is extruded through the gap between the adjustment groove 441 and the adjustment ring 53 to the other side of the second cavity 44. With the adjustment of the adjustment component 2, the gap between the adjustment ring 53 and the adjustment groove 441 can be changed. Specifically, when the threaded rod 5 moves to the left, the gap between the adjustment ring 53 and the adjustment groove 441 shrinks, so the rate at which the raw material passes through the gap between the adjustment groove 441 and the adjustment ring 53 decreases correspondingly. Conversely, the rate at which the raw material passes through the gap between the adjustment groove 441 and the adjustment ring 53 increases. Thus, through the adjustment of the adjustment component 2, the rate of raw material extrusion can be adjusted, so that when the raw material passes through the adjustment groove, it is compressed into a thin sheet due to the obstruction of the gap between the adjustment ring and the adjustment groove, and the water vapor in the raw material passing through this position is completely discharged. In the subsequent vulcanization and molding process, the finished rubber will not have poor physical strength and defective appearance due to the presence of water vapor or moisture in the rubber raw material.

[0043] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An adjustable structure for the screw exhaust of a rubber extruder, characterized in that: It includes a device housing (1) and an adjustment component (2); the adjustment component (2) is perforated and connected in the device housing (1); The adjustment component (2) consists of a first housing (21), a nut (24), and a threaded rod (25); the nut (24) is rotatably connected inside the first housing (21); the threaded rod (25) is threadedly and rotatably connected inside the nut (24); the other end of the threaded rod (25) is rotatably connected inside the device housing (1); a first cavity (26) is provided inside the first housing (21); the nut (24) is rotatably connected in the first cavity (26); a first bearing (22) and a second bearing (23) are respectively fixedly connected to the side wall of the first cavity (26); the second bearing (23) is arranged between adjacent first bearings (22); the outer side wall of the nut (24) is fixedly connected to the inner side walls of the first bearing (22) and the second bearing (23); by threading, the threaded rod inside it is threadedly rotated. Since the nut is limited inside the first housing, when the nut rotates, the threaded rod will move horizontally inward or outward along with the rotation direction of the nut. Thus, when the threaded rod moves, because the other end of it fits and connects to the threaded rod, it can drive the threaded rod to move horizontally inside the cylinder, realizing the function of adjusting the position of the threaded rod inside the cylinder; A transmission component (11) is provided at the bottom end of the device housing (1); a connection cavity (12) is provided inside the device housing (1); the other end of the threaded rod (25) is rotatably connected inside the connection cavity (12); a threaded rod (5) is rotatably connected inside the connection cavity (12); a card slot (51) is provided in the middle of the threaded rod (5); a fitting hole (52) is provided at one end of the threaded rod (5) located inside the connection cavity (12); the other end of the threaded rod (25) fits and connects inside the fitting hole (52); an adjustment ring (53) is sleeved on the card slot (51); the position of the card slot (51) on the threaded rod (5) is correspondingly arranged inside an adjustment groove (441); the adjustment ring (53) rotates correspondingly inside the adjustment groove (441); the threaded rod drives the adjustment ring in the middle of it to change the position with the adjustment groove inside the cylinder, thereby changing the size of the gap between the adjustment ring and the adjustment groove. When the rubber passes through the gap between the adjustment groove and the adjustment ring, since the gap between the adjustment ring and the adjustment groove can change under the drive of the adjustment component, the function of adjusting the passing rate of the rubber is realized. And when adjustment is not needed, the threaded rod is rotated backward to disengage it from the threaded rod.

2. The adjustable screw exhaust structure of a rubber extruder according to claim 1, characterized in that: One end of the device housing (1) is fixedly connected with a head flange (13); the other end of the head flange (13) is fixedly connected with a cylinder (4).

3. The adjustable structure for screw exhaust of a rubber extruder according to claim 2, characterized in that: A connection flange (41) is fixedly connected between adjacent cylinders (4); a rubber pad (46) is arranged between adjacent connection flanges (41); a feeding hopper (3) is communicated with one end of the cylinder (4) close to the device housing (1); a discharge seat (42) is fixedly connected to the end of the cylinder (4) far from the device housing (1).

4. The adjustable screw exhaust structure of a rubber extruder according to claim 1, characterized in that: A second cavity (44) is provided inside the cylinder body (4); the main body of the threaded rod (5) is arranged inside the second cavity (44); a water injection pipe (43) is communicated with the bottom end of the middle part of the cylinder body (4); an adjustment groove (441) is provided at a position on the inner wall of the cylinder body (4) close to the right side of the water injection pipe (43).

5. The adjustable screw exhaust structure of a rubber extruder according to claim 3, characterized in that: The inside of the discharge seat (42) is hollow; the inside of the discharge seat (42) is communicated with the second cavity (44); a hole plate (45) is fitted and connected to the front end of the discharge seat (42).

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