Elastic sealing rubber strip material and extrusion system thereof

Abstract

The invention provides an elastic sealing rubber strip material. The elastic sealing rubber strip material comprises the following components in parts by weight: 90-110 parts of EPDM, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of a dispersing agent, 4-7 parts of PEG-4000, 4-8 parts of a defoaming agent, 65-75 parts of N550 carbon black, 70-85 parts of light calcium carbonate, 90-100 parts of naphthenic oil, 1.5-3 parts of sulfur, 6.5-8 parts of an accelerant and 0.5-2.5 parts of a foaming agent. The invention further provides an extrusion system of the elastic sealing rubber strip material, the extrusion system comprises an extruder, the rubber strip extrusion end of the extruder is in butt joint with a cooling channel, the discharging end of the cooling channel is in butt joint with a transition groove, a slitting assembly is further installed, the tail end of the transition groove is in butt joint with a traction cylinder, a rotating shaft is rotationally connected into the traction cylinder, and the rotating shaft is in butt joint with the cooling channel. The two sides of the rotating shaft are fixedly connected with supports through connecting arms. The rubber strip is high in rebound rate and short in compression recovery time, the designed extrusion system can shorten the cooling time, the slitting process of the rubber strip can be completed in a traction state, and the production efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of sealing rubber strips, and in particular to an elastic sealing rubber strip material and an extrusion system thereof. Background Art

[0002] Elastic sealing strips are used in many fields. In the washing machine industry, they are mainly used to prevent water leakage and odor, and also help keep the inside of the washing machine clean and hygienic.

[0003] However, the existing elastic sealing strips have poor compression resilience, low rebound rate, long recovery time, and poor user experience. Since the sealing strips have a certain elasticity, the traditional extruder needs to pass through a long cooling water tank for cooling after vulcanization and extrusion of the strips, which occupies a large area. In order to maintain its continuous traction state, a winding and traction method is generally adopted, and then individual measurement and slitting are performed, which has low production efficiency. Summary of the invention

[0004] In view of the above problems, the present invention provides an elastic sealing strip material and an extrusion system thereof. The strip has a high rebound rate and a short compression recovery time. The designed extrusion system can shorten the cooling time and can also complete the strip cutting process under traction, thereby achieving high production efficiency.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] An elastic sealing strip material comprises the following components by weight: 90-110 parts of EPDM, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of dispersant, 4-7 parts of PEG-4000, 4-8 parts of defoamer, 65-75 parts of N550 carbon black, 70-85 parts of light calcium carbonate, 90-100 parts of cyclohexane oil, 1.5-3 parts of sulfur, 6.5-8 parts of accelerator and 0.5-2.5 parts of foaming agent.

[0007] The present invention also provides an extrusion system for elastic sealing strip materials, including an extruder, wherein the strip extrusion end of the extruder is connected to a cooling channel, the discharge end of the cooling channel is connected to a transition groove, and a slitting component is installed. The end of the transition groove is connected to a traction cylinder, and a rotating shaft is rotatably connected in the traction cylinder. Both sides of the rotating shaft are fixedly connected to a bracket through a connecting arm, and a pair of parallel traction belt machines are installed on the bracket. A circle of traction air cushion is installed on the side wall of the traction belt machine, and an inflation mechanism that can expand or contract the traction air cushion is installed on the bracket. The pair of traction air cushions expand synchronously to clamp the strip for traction and contract synchronously to release it. A discharge port is provided at the bottom of the traction cylinder, and a proximity switch is installed at the tail end of the traction cylinder, and the proximity switch corresponds to the pair of traction belt machines above. A cooling pipe for the strip to pass through is rotatably connected in the cooling channel, and the front half of the cooling pipe is provided with a water cooling component, and the rear half is provided with a water blowing component.

[0008] Preferably, the front end of the cooling tube corresponds to the extrusion end of the extruder, the rear end of the cooling tube corresponds to the transition groove, the side wall of the cooling channel is fixedly mounted with a first motor, and the output end of the first motor is connected to the cooling tube through a pair of first gear transmissions.

[0009] Preferably, the water flow cooling component includes a water pipe fixedly connected to both sides of the front half of the cooling pipe, the side wall of the water pipe is provided with a plurality of water outlet holes connected to the inner wall of the cooling pipe, the water outlet holes are arranged inclined forward, and the front end side wall of the cooling pipe is provided with a drain outlet.

[0010] Preferably, the water blowing assembly includes an air duct fixedly connected to both sides of the rear half of the cooling pipe, the side walls of the air duct are provided with a plurality of air outlet holes connected to the inner wall of the cooling pipe, the air outlet holes are arranged to be inclined backward, and suction pipes are connected to both sides of the rear end of the cooling pipe.

[0011] Preferably, the slitting assembly comprises a gantry fixedly mounted above the transition groove, a cylinder is mounted on the gantry, and a slitting knife is fixed to the telescopic end of the cylinder.

[0012] Preferably, the inflation mechanism includes a circle of annular air duct fixedly mounted on the surface of the traction belt conveyor belt, the traction air cushion is sleeved on the annular air duct and is connected with the annular air duct, a connecting air ring is fixedly mounted on the bottom of the annular air duct, an annular docking channel corresponding to the connecting air ring is fixedly mounted on the inner bottom of the bracket, an annular docking channel is provided at the top of the annular docking channel for inserting the connecting air ring, and also includes a pumping and filling component for pumping gas into the annular docking channel.

[0013] Preferably, the pumping and filling assembly includes a docking tube fixedly installed at both ends of the rotating shaft, the opposite ends of the two docking tubes extend toward the center of the rotating shaft, the extended ends of the docking tubes are connected to air distribution pipes, the air distribution pipes extend into the corresponding brackets through connecting arms, and the two ends of the air distribution pipes are connected to annular tubes, the side walls of the annular tubes are provided with a plurality of connecting holes connected to the corresponding annular docking channels, and the opposite ends of the two docking tubes are docked with pumping and filling tubes through rotating joints.

[0014] Preferably, the connecting air ring and the annular air channel are both made of rubber, a plurality of vertical supporting ribs are embedded at intervals on the circumferential side walls of the connecting air ring, and a plurality of transverse supporting ribs are fixed at intervals on the ring opening of the connecting air ring.

[0015] Preferably, a second motor is fixedly mounted on the tail end of the traction cylinder, and the output end of the second motor is connected to the rear end of the rotating shaft via a pair of second gear transmissions.

[0016] The beneficial effects of the present invention are:

[0017] 1. In terms of formulation, the vulcanization system was adjusted, different accelerators were selected to cooperate with each other, different dosages were adjusted, and repeated trials and measurements were carried out. The amount of accelerator was adjusted from 6.2 parts to 7.5 parts, and the amount of foaming agent was adjusted from the original 2 parts to 1.5 parts; in terms of extrusion vulcanization process parameters, the vulcanization temperature was adjusted from 255°C to 235°C, and the extrusion vulcanization conveyor belt speed was adjusted from 19Hz to 17.5Hz, ultimately achieving the best match between the vulcanization speed and the foaming speed, and the compression resilience of the produced sealing strips was greatly improved.

[0018] 2. By installing the cooling channel, cooling pipe, water cooling component and blowing component, the vulcanized extruded rubber strip enters the cooling pipe, and the water pipes on both sides of the front half are injected with cooling water, and then injected into the cooling pipe through multiple water outlet holes inclined forward, so as to form a water flow in the cooling pipe opposite to the feeding direction, and at the same time start the first motor, and drive the cooling pipe to rotate 90° back and forth through a pair of first gears, so that the water flow wraps around the rubber strip, and the water flow speed is greater than the feeding speed, so that the cured rubber strip can be quickly cooled and the cooling time is shortened. The cooling water is discharged through the drain port, and the cooled rubber strip passes through the rear half of the cooling pipe, and air is blown through the air ducts on both sides, and is blown out through multiple air outlet holes inclined backward, and rotates to form an air flow that wraps the rubber strip, blows away the residual moisture on the surface of the rubber strip, and sucks it out through the suction pipe, without the need to connect to the drying channel, which greatly shortens the floor space of the cooling channel.

[0019] 3. By installing the transition groove, the slitting assembly, the traction cylinder, the rotating shaft, the two pairs of traction belt conveyors, the traction air cushion and the inflation mechanism, the rubber strip after cooling and water blowing is guided into the traction cylinder through the transition groove, the second motor is started, and the rotating shaft is driven to rotate through a pair of second gears, and the bracket is turned upward so that the rubber strip corresponds to the position between the pair of traction belt conveyors above, and the gas is inflated through the front suction and inflation pipe. The gas is inflated to the pair of annular tubes above through the front docking pipe and the gas distribution pipe. The gas enters the annular docking channel through multiple connecting holes, and then the gas is filled into the annular airway through the connecting gas ring, and finally filled into the traction air cushion, so that a circle of traction air cushion is inflated and expanded. The rubber strip is expanded and a pair of traction air cushions are expanded to clamp the incoming rubber strip. A pair of traction belt conveyors are started to pull the rubber strip. The connecting air ring and the annular sealing port are in conflict with each other and the inflated state is maintained under traction. The proximity switch detects the position of the rubber strip. After reaching the preset value, the rubber strip can be cut by the slitting assembly. At this time, the clamped rubber strip is turned downward and the air is pumped out through the charging pipe to shrink the traction air cushion and release the rubber strip, which falls through the discharge port. At this time, another pair of traction belt conveyors are turned upward to continue traction. The time of the conversion process is consistent with the time it takes for the rubber strip to pass through the transition groove, so that the slitting process of the rubber strip can be completed under traction, and the production efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 A cross-sectional schematic diagram of the cooling channel proposed by the present invention;

[0022] Figure 3 It is a cross-sectional schematic diagram of the traction drum proposed by the present invention;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure enlargement at point A;

[0024] Figure 5 A schematic top view of a pair of traction belt conveyors proposed by the present invention;

[0025] Figure 6 A bottom-up schematic diagram of the annular airway proposed by the present invention;

[0026] Figure 7 A schematic cross-sectional view of the rotating shaft proposed by the present invention;

[0027] Figure 8 This is a rear view schematic diagram of the traction drum proposed by the present invention.

[0028] In the figure: 1 extruder, 2 cooling channel, 3 traction cylinder, 4 water outlet, 5 cooling pipe, 6 drain, 7 water pipe, 8 first gear, 9 first motor, 10 air duct, 11 suction pipe, 12 transition trough, 13 cylinder, 14 bracket, 15 rotating shaft, 16 docking pipe, 17 connecting arm, 18 air distribution pipe, 19 discharge port, 20 traction belt conveyor, 21 traction air cushion, 22 annular airway, 23 connecting air ring, 24 annular docking channel, 25 annular pipe, 26 transverse support ribs, 27 proximity switch, 28 second gear, 29 pumping pipe, 30 annular sealing port. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] An elastic sealing strip material comprises the following components by weight: 90-110 parts of EPDM, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of dispersant, 4-7 parts of PEG-4000, 4-8 parts of defoamer, 65-75 parts of N550 carbon black, 70-85 parts of light calcium carbonate, 90-100 parts of cyclohexane oil, 1.5-3 parts of sulfur, 6.5-8 parts of accelerator and 0.5-2.5 parts of foaming agent.

[0032] Specifically, 100 parts of EPDM, 5 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of dispersant, 5 parts of PEG-4000, 6 parts of defoamer, 70 parts of N550 carbon black, 80 parts of light calcium carbonate, 95 parts of cyclohexane oil, 1.5 parts of sulfur, 7.5 parts of accelerator, and 1.5 parts of foaming agent.

[0033] In terms of formulation, the vulcanization system was adjusted, different accelerators were selected to cooperate with each other, different dosages were adjusted, and repeated trials and measurements were carried out. The amount of accelerator was adjusted from 6.2 parts to 7.5 parts, and the amount of foaming agent was adjusted from the original 2 parts to 1.5 parts. In terms of extrusion vulcanization process parameters, the vulcanization temperature was adjusted from 255°C to 235°C, and the extrusion vulcanization conveyor belt speed was adjusted from 19Hz to 17.5Hz. Ultimately, the vulcanization speed and foaming speed were optimally matched, and the compression resilience of the produced sealing strips was greatly improved.

[0034] Test results:

[0035] 1. Deformation rebound rate: increased from the original 81.4% to 87.8%.

[0036] 2. Full recovery capability: shortened from the original 2.2S to the current 1.5S.

[0037] Reference Figure 1-8 In order to adapt to the extrusion of elastic sealing strips, an extrusion system of elastic sealing strip materials is disclosed, including an extruder 1, a strip extrusion end of the extruder 1 is connected to a cooling channel 2, a cooling pipe 5 for the strip to pass through is rotatably connected in the cooling channel 2, the front half of the cooling pipe 5 is provided with a water flow cooling component, and the rear half is provided with a water blowing component, the front end of the cooling pipe 5 corresponds to the extrusion end of the extruder 1, and the rear end of the cooling pipe 5 corresponds to the transition groove 12, a first motor 9 is fixedly installed on the side wall of the cooling channel 9, the output end of the first motor 9 is connected to the cooling pipe 5 through a pair of first gears 8, the first motor 9 is started, and the cooling pipe 5 is driven to rotate 90° forward and backward through the pair of first gears 8, thereby greatly shortening the floor space of the cooling channel.

[0038] Specifically, the water cooling assembly includes a water pipe 7 fixedly connected to both sides of the front half of the cooling pipe 5. The side wall of the water pipe 7 is provided with a plurality of water outlet holes 4 connected to the inner wall of the cooling pipe 5. The water outlet holes 4 are arranged to be inclined forward. The front end side wall of the cooling pipe 5 is provided with a drain port 6. The cooling water is injected into the water pipes 7 on both sides of the front half and is injected into the cooling pipe 5 through the plurality of water outlet holes 4 inclined forward. A water flow opposite to the feed direction is formed in the cooling pipe 5. The water flow wraps around the rubber strip. The water flow speed is greater than the feed speed, so that the rubber strip can be quickly cooled and solidified, shortening the cooling time. The cooling water is discharged through the drain port 6.

[0039] Specifically, the water blowing assembly includes an air duct 10 fixedly connected to both sides of the rear half of the cooling pipe 5. The side walls of the air duct 10 are provided with a plurality of air outlets connected to the inner wall of the cooling pipe 5. The air outlets are arranged to be tilted backwards. Suction ducts 11 are connected to both sides of the rear end of the cooling pipe 5. The cooled rubber strip passes through the rear half of the cooling pipe 5, and air is blown through the air ducts 10 on both sides and blown out through the plurality of air outlets tilted backwards. The air flow is formed to wrap the rubber strip by rotating, and the moisture remaining on the surface of the rubber strip is blown away and sucked out through the suction duct 11 without connecting to the drying channel.

[0040] The discharging end of the cooling channel 2 is connected to a transition groove 12, and is also equipped with a slitting assembly, which includes a gantry fixedly installed above the transition groove 12, on which a cylinder 13 is installed, and a slitting knife is fixed to the telescopic end of the cylinder 13. A proximity switch 27 is installed at the tail end of the traction cylinder 3, and the proximity switch 27 corresponds to a pair of traction belt conveyors 20 above. The proximity switch 27 detects the position of the rubber strip. When the preset value is reached, the slitting knife can be driven down by the cylinder 13 to cut the rubber strip.

[0041] The end of the transition groove 12 is docked with a traction cylinder 3, and a rotating shaft 15 is rotatably connected in the traction cylinder 3. Both sides of the rotating shaft 15 are fixedly connected with brackets 14 through connecting arms 17. A pair of parallel traction belt conveyors 20 are installed on the brackets 14. A circle of traction air cushion 21 is installed on the side wall of the traction belt conveyor 20. A discharge port 19 is provided at the bottom of the traction cylinder 3. A second motor is fixedly installed at the tail end of the traction cylinder 3. The output end of the second motor is connected to the rear end of the rotating shaft 15 through a pair of second gears 28. When the second motor is started, the rotating shaft 15 is driven to rotate through the pair of second gears 28.

[0042] An inflation mechanism that can expand or contract the traction air cushion 21 is installed on the bracket 14. A pair of traction air cushions 21 expand synchronously to clamp the rubber strip for traction and contract synchronously to release. The inflation mechanism includes a circle of annular air channel 22 fixedly installed on the belt surface of the traction belt conveyor 20. The traction air cushion 21 is sleeved on the annular air channel 22 and is connected with it. A connecting air ring 23 is fixedly installed at the bottom of the annular air channel 22. An annular docking channel 24 corresponding to the connecting air ring 23 is fixedly installed at the inner bottom of the bracket 14. The top of the annular docking channel 24 is provided with an annular sealing port 30 for inserting the connecting air ring 23, and also includes a pumping component for pumping gas into the annular docking channel 24.

[0043] Furthermore, the pumping and filling assembly includes a docking tube 16 fixedly mounted at both ends of the rotating shaft 15, and the opposite ends of the two docking tubes 16 extend toward the center of the rotating shaft 15. The extended ends of the docking tubes 16 are connected to the air distribution pipes 18, and the air distribution pipes 18 extend into the corresponding brackets 14 through the connecting arms 17. Both ends of the air distribution pipes 18 are connected to annular tubes 25, and the side walls of the annular tubes 25 are provided with a plurality of connecting holes connected to the corresponding annular docking channels 24. The opposite ends of the two docking tubes 16 are docked with pumping and filling tubes 29 through rotating joints, and the front end pumping and filling tubes 29 are inflated, and the gas is inflated toward a pair of annular tubes 25 upward through the front end docking tube 16 and the air distribution pipes 18. The gas enters the annular docking channel 24 through a plurality of connecting holes, and then is filled into the annular airway 22 through the connecting air ring 23, and finally is filled into the traction air cushion 21, so that a circle of traction air cushion 21 is inflated, and a pair of traction air cushions 21 expand to clamp the entering rubber strip, and a pair of traction belt conveyors 20 are started to haul the rubber strip.

[0044] Furthermore, the connecting air ring 23 and the annular air channel 22 are both made of rubber, and a plurality of vertical supporting ribs are embedded at intervals in the circumferential side walls of the connecting air ring 23, and a plurality of transverse supporting ribs 26 are fixed at intervals in the ring opening of the connecting air ring 23. The combined effect of the plurality of vertical supporting ribs and the transverse supporting ribs 26 can keep the connecting air ring 23 in an open state during the rotation process, always abutting against the inner wall of the annular sealing opening 30, thereby maintaining a sealed state during the rotation process.

[0045] The vulcanized extruded rubber strip enters the cooling pipe 5, and cooling water is injected into the water pipes 7 on both sides of the front half, and is injected into the cooling pipe 5 through multiple water outlet holes 4 inclined forward, forming a water flow in the cooling pipe 5 opposite to the feeding direction, and at the same time starting the first motor 9, and driving the cooling pipe 5 to rotate 90° forward and reversely through a pair of first gears 8, so that the water flow wraps around the rubber strip, and the water flow speed is greater than the feeding speed, so that the cured rubber strip can be quickly cooled and the cooling time is shortened. The cooling water is discharged through the drain port 6, and the cooled rubber strip passes through the rear half of the cooling pipe 5, and is blown through the air ducts 10 on both sides, and is blown out through multiple air outlet holes inclined backward, and rotates to form an air flow that wraps the rubber strip, blows away the residual moisture on the surface of the rubber strip, and sucks it out through the suction pipe 11.

[0046] The rubber strip after cooling and water blowing is guided into the traction cylinder 3 through the transition groove 12, and the second motor is started. The rotating shaft 15 is driven to rotate through a pair of second gears 28, and the bracket 14 is rotated upward, so that the rubber strip corresponds to the position between the pair of traction belt conveyors 20 above, and is inflated through the front suction and filling pipe 29. The gas is inflated to the pair of annular tubes 25 above through the front docking pipe 16 and the gas distribution pipe 18. The gas enters the annular docking channel 24 through multiple connecting holes, and then the gas is filled into the annular airway 22 through the connecting air ring 23, and finally filled into the traction air cushion 21, so that a circle of traction air cushion 21 is inflated and expanded, and the pair of traction air cushions 21 are expanded and clamped. When the rubber strip enters, a pair of traction belt conveyors 20 are started to pull the rubber strip. The connecting air ring 23 and the annular sealing port 30 are in contact with each other and remain in an inflated state under traction. The proximity switch 27 detects the position of the rubber strip. After reaching the preset value, the rubber strip can be cut by the slitting assembly. At this time, the clamped rubber strip is turned downward and the suction pipe 29 is evacuated to shrink the traction air cushion 21, releasing the rubber strip and dropping it through the discharge port 19. At this time, another pair of traction belt conveyors 20 are turned upward to continue traction. The time of the conversion process is consistent with the time it takes for the rubber strip to pass through the transition groove 12, so that the slitting process of the rubber strip is completed under traction, and production efficiency is high.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An elastic sealing strip material, characterized in that: The invention comprises the following components by weight: 90-110 parts of EPDM, 3-6 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of dispersant, 4-7 parts of PEG-4000, 4-8 parts of defoamer, 65-75 parts of N550 carbon black, 70-85 parts of light calcium carbonate, 90-100 parts of naphthenic oil, 1.5-3 parts of sulfur, 6.5-8 parts of accelerator and 0.5-2.5 parts of foaming agent.

2. An extrusion system for elastic sealing strip material, comprising an extruder (1), characterized in that: The rubber strip extrusion end of the extruder (1) is butt-jointed with a cooling channel (2), the discharge end of the cooling channel (2) is butt-jointed with a transition groove (12), and a slitting assembly is also installed, the end of the transition groove (12) is butt-jointed with a traction cylinder (3), a rotating shaft (15) is rotatably connected inside the traction cylinder (3), both sides of the rotating shaft (15) are fixedly connected with a bracket (14) through a connecting arm (17), a pair of parallel traction belt conveyors (20) are installed on the bracket (14), and a circle of traction air cushion (21) is installed on the side wall of the traction belt conveyor (20), and the An inflating mechanism capable of expanding or contracting the traction air cushion (21) is installed on the bracket (14). A pair of traction air cushions (21) expand synchronously to clamp the rubber strip for traction and contract synchronously to release it. A discharge port (19) is provided at the bottom of the traction cylinder (3). A proximity switch (27) is installed at the tail end of the traction cylinder (3). The proximity switch (27) corresponds to a pair of traction belt conveyors (20) above. A cooling pipe (5) for the rubber strip to pass through is rotatably connected in the cooling channel (2). The front half of the cooling pipe (5) is provided with a water cooling component, and the rear half is provided with a water blowing component.

3. The extrusion system of an elastic sealing strip material according to claim 2, characterized in that: The front end of the cooling tube (5) corresponds to the extrusion end of the extruder (1), and the rear end of the cooling tube (5) corresponds to the transition groove (12). A first motor (9) is fixedly mounted on the side wall of the cooling channel (9), and the output end of the first motor (9) is connected to the cooling tube (5) by a pair of first gears (8).

4. The extrusion system of an elastic sealing strip material according to claim 2, characterized in that: The water flow cooling assembly comprises a water pipe (7) fixedly connected to both sides of the front half of the cooling pipe (5); the side wall of the water pipe (7) is provided with a plurality of water outlet holes (4) connected to the inner wall of the cooling pipe (5); the water outlet holes (4) are arranged to be inclined forward; and the front end side wall of the cooling pipe (5) is provided with a drainage port (6).

5. The extrusion system of an elastic sealing strip material according to claim 2, characterized in that: The water blowing assembly comprises an air duct (10) fixedly connected to both sides of the rear half of the cooling pipe (5); the side walls of the air duct (10) are provided with a plurality of air outlet holes connected to the inner wall of the cooling pipe (5); the air outlet holes are arranged to be inclined toward the rear; and the rear ends of the cooling pipe (5) are connected to air suction pipes (11) on both sides.

6. The extrusion system of an elastic sealing strip material according to claim 2, characterized in that: The slitting assembly comprises a gantry fixedly mounted above the transition groove (12), a cylinder (13) being mounted on the gantry, and a slitting knife being fixed at the telescopic end of the cylinder (13).

7. The extrusion system of an elastic sealing strip material according to claim 2, characterized in that: The inflation mechanism comprises a circle of annular air channel (22) fixedly mounted on the belt surface of the traction belt conveyor (20); the traction air cushion (21) is sleeved on the annular air channel (22) and is connected thereto; a connecting air ring (23) is fixedly mounted on the bottom of the annular air channel (22); an annular docking channel (24) corresponding to the connecting air ring (23) is fixedly mounted on the inner bottom of the bracket (14); an annular sealing opening (30) is provided at the top of the annular docking channel (24) for inserting the connecting air ring (23); and a pumping component for pumping gas into the annular docking channel (24) is also included.

8. The extrusion system of the elastic sealing strip material according to claim 7, characterized in that: The pumping and filling assembly comprises a butt joint tube (16) fixedly mounted on both ends of the rotating shaft (15), the opposite ends of the two butt joint tubes (16) extending toward the center of the rotating shaft (15), the extended ends of the butt joint tube (16) being connected to an air distribution pipe (18), the air distribution pipe (18) extending into the corresponding bracket (14) through a connecting arm (17), the two ends of the air distribution pipe (18) being connected to an annular tube (25), the side wall of the annular tube (25) being provided with a plurality of connecting holes connected to the corresponding annular butt joint channels (24), and the opposite ends of the two butt joint tubes (16) being butt jointed with a pumping and filling tube (29) through a rotating joint.

9. The extrusion system of the elastic sealing strip material according to claim 7, characterized in that: The connecting air ring (23) and the annular air channel (22) are both made of rubber. A plurality of vertical supporting ribs are embedded at intervals on the circumferential side wall of the connecting air ring (23). A plurality of transverse supporting ribs (26) are fixed at intervals on the ring opening of the connecting air ring (23).

10. An extrusion system for elastic sealing strip material according to claim 2, characterized in that: A second motor is fixedly mounted on the rear end of the traction cylinder (3), and the output end of the second motor is transmission-connected to the rear end of the rotating shaft (15) via a pair of second gears (28).

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