A composite waterproof sealing rubber strip and its manufacturing method

Abstract

This invention relates to the field of rubber sealing strip technology, specifically a composite waterproof sealing rubber strip and its manufacturing method. It includes an inner core, an outer sleeve fitted over the inner core, the outer sleeve comprising a rubber layer, a paint layer coated on the outside of the rubber layer, and a flame-retardant layer coated on the outside of the paint layer. An injection hole is provided on one side of the top outer wall of the outer sleeve. The inner core includes a core body, and an adhesive is sprayed onto the outer wall of the core body, bonding it to the rubber layer. The inner core and outer sleeve of this invention can form a nested sealing strip structure, which can improve the pressure resistance of the sealing strip, giving it higher elasticity and improving its sealing performance and service life. The added high-styrene has good mechanical properties and elasticity, good compatibility with rubber, and can reinforce and harden the sealing strip, further improving its elasticity.

Description

Technical Field

[0001] This invention relates to the field of rubber sealing strip technology, specifically a composite waterproof sealing rubber strip and its manufacturing method. Background Technology

[0002] Rubber sealing strips can be classified according to several methods, such as cross-sectional shape, vulcanization method, application location and purpose, and materials used. Rubber sealing strips are now widely used in fields such as electronics, electrical engineering, lighting, and chemical industry. They have many application characteristics and can be applied in a wide range of fields.

[0003] Chinese Patent No. CN110978458A provides a method for manufacturing and processing sealing rubber strips, including a base plate, a cooling device, a trimming device, a drying device, and a winding device. The cooling device is installed at the upper end of the base plate, the trimming device is installed on the inner right side of the cooling device, an L-shaped plate is installed on the outer right side of the cooling device, the drying device is installed at the lower left side of the L-shaped plate, and the winding device is installed at the upper left side of the L-shaped plate. This invention solves the problems of existing sealing rubber strips, which are easily stretched by external tension during extrusion, causing deformation of the uncured rubber strip and affecting its performance; excess material easily accumulates on the outer surface of the rubber strip during extrusion, making it difficult to clean the outer surface; and poor winding effect, uneven winding, and loosening after winding.

[0004] When sealing rubber strips are used, they undergo a series of bending and other processes before being installed at the gaps. However, existing rubber strips have insufficient pressure resistance and poor performance. After a period of time, their elasticity decreases, resulting in poor sealing and easy detachment. Therefore, there is an urgent need to develop a composite waterproof sealing rubber strip and its manufacturing method. Summary of the Invention

[0005] The purpose of this invention is to provide a composite waterproof sealing rubber strip and its manufacturing method, so as to solve the problems mentioned in the background art, such as insufficient pressure resistance of the rubber strip, poor performance, reduced elasticity over time, poor sealing performance, and easy detachment.

[0006] The technical solution of the present invention is: a composite waterproof sealing rubber strip, comprising an inner core, an outer sleeve fitted over the inner core, the outer sleeve comprising a rubber layer, the rubber layer being coated with a paint layer, and the paint layer being coated with a flame retardant layer, an injection hole being provided on one side of the top outer wall of the outer sleeve, the inner core comprising a core body, the outer wall of the core body being coated with an adhesive, and the adhesive being bonded to the rubber layer.

[0007] A method for manufacturing a composite waterproof sealing rubber strip includes the following steps: S1. Material selection: Select the appropriate materials according to the inner core and rubber layer, weigh the materials using a weighing device, and then classify and place the weighed materials on the corresponding trolleys. S2. Material mixing: Pour the two sets of prepared materials into the mixing equipment, and then pre-treat them through a high-speed mixer to make them more plastic. S3. Extrusion molding: The die head of the extruder is equipped with a die, and then the mixed rubber raw material is put into the extruder. Then, by rotating the screw, the rubber material is moved towards the die head to extrude the shape of the sealing strip. Afterwards, it is cooled by cold water to obtain the molded inner core and rubber layer. S4. Vulcanization treatment: The extruded core and rubber layer are sent into the drying tunnel for high-temperature vulcanization and conditioning. S5. Adhesive injection assembly: The rubber layer is pulled into the spray painting equipment, then sprayed, and then heated and dried to form the paint layer and flame retardant layer, making the rubber layer into an outer layer. Then the inner core is inserted into the outer layer, and adhesive is injected between the inner core and the outer layer (2) through the adhesive injection hole to bond the inner core and the outer layer together. The drying equipment is used to dry the rubber during the adhesive injection process. S6. Cutting and finishing: The sealing strips prepared above are fed into a cutting device, and then the cutting device is operated to cut the sealing strips. The cut sealing strips are then rolled together and sent to the warehouse.

[0008] Furthermore, the core material in S1 is fluorosilicone rubber, nitrile rubber, acrylic rubber, glass fiber powder, high styrene, and benzoic acid, which is composed of the following raw materials in parts by weight: 30-40 parts of fluorosilicone rubber; 30-40 parts of nitrile rubber; 30-40 parts acrylic rubber; 10-15 parts of glass fiber powder; 15-20 parts high-styrene; 8-12 parts benzoic acid; 2-3 parts of vulcanizing agent; Anti-aging agent 2-3 parts; Accelerator 0.5-1 part; Plasticizer 1-1.5 parts; Antioxidant 1-2 parts.

[0009] Furthermore, the rubber layer material in S1 is silicone rubber, EPDM rubber, reinforcing agent, tripropylene isocyanurate, active zinc oxide, and stearic acid, which are composed of the following raw materials in parts by weight: 45-60 parts of silicone rubber; 20-30 parts of EPDM rubber; 5-20 parts of reinforcing agent; 3-5 parts of tripropylene isocyanurate; 5-6 parts of active zinc oxide; 1-2 parts stearic acid; 2-3 parts of vulcanizing agent; Anti-aging agent 2-3 parts; Accelerator 0.5-1 part; Plasticizer 1-1.5 parts; Antioxidant 1-2 parts.

[0010] Furthermore, the temperature during the mixing of the core material in S2 should be controlled below 120-150℃, and the mixing time should be between 20-40 minutes.

[0011] Furthermore, during the mixing of the rubber layer material in S2, the initial temperature is 170-180℃, the final temperature is controlled at 180-190℃, the temperature rise rate is about 5-10℃ / min, and the temperature is maintained within this temperature range for 10-30min.

[0012] Furthermore, in S3, the traction speed of the extruder for the inner core material is 12-15 m / min, and the temperature of the rubber material inside the extruder head is about 100-120℃.

[0013] Furthermore, in S3, the traction speed of the rubber layer material extrusion machine is 10-13 m / min, and the temperature of the rubber material inside the extruder head is about 110-130℃.

[0014] Furthermore, the cooling time of the cold water in S3 is 20-40 minutes.

[0015] Furthermore, in S4, the vulcanization temperature is 150-180℃ and the time is 100-150 seconds.

[0016] This invention provides an improved composite waterproof sealing rubber strip and its manufacturing method, which has the following improvements and advantages compared with the prior art: (1) The inner core and outer sleeve designed in this invention can form a nested sealing strip structure, which can improve the pressure resistance of the sealing strip, make the sealing strip more elastic, and improve the sealing performance and service life of the sealing strip.

[0017] (2) The high styrene material designed in this invention has good mechanical properties and elasticity, good compatibility with rubber, can reinforce and harden the sealing strip, and is beneficial to improving the elasticity of the sealing strip.

[0018] (3) The glass fiber powder and benzoic acid designed in this invention have finer particle size, which can improve the mechanical strength of the sealing strip and enhance its pressure resistance. Benzoic acid can significantly increase the vulcanization critical temperature of the vulcanization accelerator, increase the scorch resistance of the rubber compound, and improve the hardness of the sealing strip, making the sealing strip less likely to fall off. Attached Figure Description

[0019] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the inner core structure of the present invention; Figure 3 This is a schematic diagram of the outer casing structure of the present invention; Figure 4 This is a flowchart of the manufacturing method of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Inner core; 2. Outer shell; 3. Core body; 4. Adhesive; 5. Rubber layer; 6. Paint layer; 7. Flame retardant layer; 8. Injection hole. Detailed Implementation

[0021] The following will be combined with the appendix Figure 1-4 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] This invention provides, through improvements, a composite waterproof sealing rubber strip, such as... Figures 1-3 As shown, it includes an inner core 1, an outer sleeve 2 fitted over the inner core 2, the outer sleeve 2 includes a rubber layer 5, the rubber layer 5 is coated with a paint layer 6, and the paint layer 6 is coated with a flame retardant layer 7. An injection hole 8 is provided on one side of the top outer wall of the outer sleeve 2. The inner core 2 includes a core body 3, and an adhesive 4 is sprayed on the outer wall of the side of the core body 3, and the adhesive 4 is bonded to the rubber layer 5.

[0024] A method for manufacturing a composite waterproof sealing rubber strip, such as Figure 4 The process, as shown, includes the following steps: S1. Material Selection: Select appropriate materials based on the inner core 1 and rubber layer 5, and weigh the materials using a weighing device. Then, classify and place the weighed materials on the corresponding trolleys. The materials for the inner core 1 are fluorosilicone rubber, nitrile rubber, acrylic rubber, glass fiber powder, high styrene, and benzoic acid, which are composed of the following parts by weight: 40 parts of fluorosilicone rubber; 40 parts of nitrile rubber; 40 parts acrylic rubber; 15 parts glass fiber powder; 20 parts high-styrene; 12 parts benzoic acid; 3 parts vulcanizing agent; Anti-aging agent 3 parts; One part of accelerator; 1.5 parts plasticizer; Two parts antioxidant; Rubber layer 5 is made of silicone rubber, EPDM rubber, reinforcing agent, tripropylene isocyanurate, active zinc oxide, and stearic acid, and is composed of the following raw materials in parts by weight: 60 parts of silicone rubber; 30 parts of EPDM rubber; 20 parts of reinforcing agent; 5 parts of tripropylene isocyanurate; 6 parts of active zinc oxide; Stearic acid 2 parts; 3 parts vulcanizing agent; 3 parts anti-aging agent; One part of accelerator; 1.5 parts plasticizer; Two portions of antioxidant.

[0025] S2. Material mixing: Pour the two prepared materials into the mixing equipment, and then pre-treat them through a high-speed mixer to make them more plastic. When mixing the inner core 1 material, the temperature should be controlled below 120℃ and the mixing time should be about 30 minutes. When mixing the rubber layer 5 material, the initial temperature should be 170℃ and the final temperature should be controlled at 180℃, with a temperature rise rate of about 5℃ / min. Keep it at this temperature range for 20 minutes. S3. Extrusion Molding: The die head of the extruder is equipped with a die, and then the mixed rubber raw material is put into the extruder. Then, by rotating the screw, the rubber material is moved towards the die head to extrude the shape of the sealing strip. The traction speed of the inner core 1 material during extrusion is 12m / min, and the temperature of the rubber material in the extruder head is about 120℃. The traction speed of the rubber layer 5 material during extrusion is 10m / min, and the temperature of the rubber material in the extruder head is about 120℃. Then, it is cooled by cold water to obtain the molded inner core 1 and rubber layer 5. The cold water cooling time is 30min. S4. Vulcanization treatment: The extruded inner core 1 and rubber layer 5 are sent into the drying tunnel for high-temperature vulcanization and conditioning. The vulcanization temperature is 160℃ and the time is 120S. S5. Adhesive injection assembly: The rubber layer 5 is pulled into the painting equipment, then painted, and then heated and dried to form the paint layer 6 and the flame retardant layer 7, so that the rubber layer 5 becomes the outer jacket 2. Then the inner core 1 is inserted into the outer jacket 2, and adhesive 4 is injected between the inner core 1 and the outer jacket 2 through the adhesive injection hole 8 to bond the inner core 1 and the outer jacket 2 together. The drying equipment is used to dry the rubber layer during the adhesive injection process. S6. Cutting and finishing: The sealing strips prepared above are fed into a cutting device, and then the cutting device is operated to cut the sealing strips. The cut sealing strips are then rolled together and sent to the warehouse.

[0026] Example 1 A method for manufacturing a composite waterproof sealing rubber strip includes the following steps: S1. Material Selection: Select appropriate materials based on the inner core 1 and rubber layer 5, and weigh the materials using a weighing device. Then, classify and place the weighed materials on the corresponding trolleys. The materials for the inner core 1 are fluorosilicone rubber, nitrile rubber, acrylic rubber, glass fiber powder, high styrene, and benzoic acid, which are composed of the following parts by weight: 40 parts of fluorosilicone rubber; 40 parts of nitrile rubber; 40 parts acrylic rubber; 15 parts glass fiber powder; 20 parts high-styrene; 12 parts benzoic acid; 3 parts vulcanizing agent; 3 parts anti-aging agent; One part of accelerator; 1.5 parts plasticizer; Two parts antioxidant; Rubber layer 5 is made of silicone rubber, EPDM rubber, reinforcing agent, tripropylene isocyanurate, active zinc oxide, and stearic acid, and is composed of the following raw materials in parts by weight: 60 parts of silicone rubber; 30 parts of EPDM rubber; 20 parts of reinforcing agent; 5 parts of tripropylene isocyanurate; 6 parts of active zinc oxide; Stearic acid 2 parts; 3 parts vulcanizing agent; 3 parts anti-aging agent; One part of accelerator; 1.5 parts plasticizer; Two portions of antioxidant.

[0027] S2. Material mixing: Pour the two prepared materials into the mixing equipment, and then pre-treat them through a high-speed mixer to make them more plastic. When mixing the inner core 1 material, the temperature should be controlled below 120℃ and the mixing time should be about 30 minutes. When mixing the rubber layer 5 material, the initial temperature should be 170℃ and the final temperature should be controlled at 180℃, with a temperature rise rate of about 5℃ / min. Keep it at this temperature range for 20 minutes. S3. Extrusion Molding: The die head of the extruder is equipped with a die, and then the mixed rubber raw material is put into the extruder. Then, by rotating the screw, the rubber material is moved towards the die head to extrude the shape of the sealing strip. The traction speed of the inner core 1 material during extrusion is 12m / min, and the temperature of the rubber material in the extruder head is about 120℃. The traction speed of the rubber layer 5 material during extrusion is 10m / min, and the temperature of the rubber material in the extruder head is about 120℃. Then, it is cooled by cold water to obtain the molded inner core 1 and rubber layer 5. The cold water cooling time is 30min. S4. Vulcanization treatment: The extruded inner core 1 and rubber layer 5 are sent into the drying tunnel for high-temperature vulcanization and conditioning. The vulcanization temperature is 160℃ and the time is 120S. S5. Adhesive injection assembly: The rubber layer 5 is pulled into the painting equipment, then painted, and then heated and dried to form the paint layer 6 and the flame retardant layer 7, so that the rubber layer 5 becomes the outer jacket 2. Then the inner core 1 is inserted into the outer jacket 2, and adhesive 4 is injected between the inner core 1 and the outer jacket 2 through the adhesive injection hole 8 to bond the inner core 1 and the outer jacket 2 together. The drying equipment is used to dry the rubber layer during the adhesive injection process. S6. Cutting and finishing: The sealing strips prepared above are fed into a cutting device, and then the cutting device is operated to cut the sealing strips. The cut sealing strips are then rolled together and sent to the warehouse.

[0028] Example 2 A method for manufacturing a composite waterproof sealing rubber strip includes the following steps: S1. Material Selection: Select appropriate materials based on the inner core 1 and rubber layer 5, and weigh the materials using a weighing device. Then, classify and place the weighed materials on the corresponding trolleys. The materials for the inner core 1 are fluorosilicone rubber, nitrile rubber, acrylic rubber, glass fiber powder, high styrene, and benzoic acid, which are composed of the following parts by weight: 40 parts of fluorosilicone rubber; 40 parts of nitrile rubber; 40 parts acrylic rubber; 12 parts glass fiber powder; 20 parts high-styrene; 12 parts benzoic acid; 3 parts vulcanizing agent; 3 parts anti-aging agent; One part of accelerator; 1.5 parts plasticizer; Two parts antioxidant; Rubber layer 5 is made of silicone rubber, EPDM rubber, reinforcing agent, tripropylene isocyanurate, active zinc oxide, and stearic acid, and is composed of the following raw materials in parts by weight: 60 parts of silicone rubber; 30 parts of EPDM rubber; 20 parts of reinforcing agent; 5 parts of tripropylene isocyanurate; 6 parts of active zinc oxide; Stearic acid 2 parts; 3 parts vulcanizing agent; 3 parts anti-aging agent; One part of accelerator; 1.5 parts plasticizer; Two portions of antioxidant.

[0029] S2. Material mixing: Pour the two prepared materials into the mixing equipment, and then pre-treat them through a high-speed mixer to make them more plastic. When mixing the inner core 1 material, the temperature should be controlled below 120℃ and the mixing time should be about 30 minutes. When mixing the rubber layer 5 material, the initial temperature should be 170℃ and the final temperature should be controlled at 180℃, with a temperature rise rate of about 5℃ / min. Keep it at this temperature range for 20 minutes. S3. Extrusion Molding: The die head of the extruder is equipped with a die, and then the mixed rubber raw material is put into the extruder. Then, by rotating the screw, the rubber material is moved towards the die head to extrude the shape of the sealing strip. The traction speed of the inner core 1 material during extrusion is 12m / min, and the temperature of the rubber material in the extruder head is about 120℃. The traction speed of the rubber layer 5 material during extrusion is 10m / min, and the temperature of the rubber material in the extruder head is about 120℃. Then, it is cooled by cold water to obtain the molded inner core 1 and rubber layer 5. The cold water cooling time is 30min. S4. Vulcanization treatment: The extruded inner core 1 and rubber layer 5 are sent into the drying tunnel for high-temperature vulcanization and conditioning. The vulcanization temperature is 160℃ and the time is 120S. S5. Adhesive injection assembly: The rubber layer 5 is pulled into the painting equipment, then painted, and then heated and dried to form the paint layer 6 and the flame retardant layer 7, so that the rubber layer 5 becomes the outer jacket 2. Then the inner core 1 is inserted into the outer jacket 2, and adhesive 4 is injected between the inner core 1 and the outer jacket 2 through the adhesive injection hole 8 to bond the inner core 1 and the outer jacket 2 together. The drying equipment is used to dry the rubber layer during the adhesive injection process. S6. Cutting and finishing: The sealing strips prepared above are fed into a cutting device, and then the cutting device is operated to cut the sealing strips. The cut sealing strips are then rolled together and sent to the warehouse.

[0030] Example 3 A method for manufacturing a composite waterproof sealing rubber strip includes the following steps: S1. Material Selection: Select appropriate materials based on the inner core 1 and rubber layer 5, and weigh the materials using a weighing device. Then, classify and place the weighed materials on the corresponding trolleys. The materials for the inner core 1 are fluorosilicone rubber, nitrile rubber, acrylic rubber, glass fiber powder, high styrene, and benzoic acid, which are composed of the following parts by weight: 40 parts of fluorosilicone rubber; 40 parts of nitrile rubber; 40 parts acrylic rubber; 10 parts glass fiber powder; 20 parts high-styrene; 12 parts benzoic acid; 3 parts vulcanizing agent; 3 parts anti-aging agent; One part of accelerator; 1.5 parts plasticizer; Two parts antioxidant; Rubber layer 5 is made of silicone rubber, EPDM rubber, reinforcing agent, tripropylene isocyanurate, active zinc oxide, and stearic acid, and is composed of the following raw materials in parts by weight: 60 parts of silicone rubber; 30 parts of EPDM rubber; 20 parts of reinforcing agent; 5 parts of tripropylene isocyanurate; 6 parts of active zinc oxide; Stearic acid 2 parts; 3 parts vulcanizing agent; 3 parts anti-aging agent; One part of accelerator; 1.5 parts plasticizer; Two portions of antioxidant.

[0031] S2. Material mixing: Pour the two prepared materials into the mixing equipment, and then pre-treat them through a high-speed mixer to make them more plastic. When mixing the inner core 1 material, the temperature should be controlled below 120℃ and the mixing time should be about 30 minutes. When mixing the rubber layer 5 material, the initial temperature should be 170℃ and the final temperature should be controlled at 180℃, with a temperature rise rate of about 5℃ / min. Keep it at this temperature range for 20 minutes. S3. Extrusion Molding: The die head of the extruder is equipped with a die, and then the mixed rubber raw material is put into the extruder. Then, by rotating the screw, the rubber material is moved towards the die head to extrude the shape of the sealing strip. The traction speed of the inner core 1 material during extrusion is 12m / min, and the temperature of the rubber material in the extruder head is about 120℃. The traction speed of the rubber layer 5 material during extrusion is 10m / min, and the temperature of the rubber material in the extruder head is about 120℃. Then, it is cooled by cold water to obtain the molded inner core 1 and rubber layer 5. The cold water cooling time is 30min. S4. Vulcanization treatment: The extruded inner core 1 and rubber layer 5 are sent into the drying tunnel for high-temperature vulcanization and conditioning. The vulcanization temperature is 160℃ and the time is 120S. S5. Adhesive injection assembly: The rubber layer 5 is pulled into the painting equipment, then painted, and then heated and dried to form the paint layer 6 and the flame retardant layer 7, so that the rubber layer 5 becomes the outer jacket 2. Then the inner core 1 is inserted into the outer jacket 2, and adhesive 4 is injected between the inner core 1 and the outer jacket 2 through the adhesive injection hole 8 to bond the inner core 1 and the outer jacket 2 together. The drying equipment is used to dry the rubber layer during the adhesive injection process. S6. Cutting and finishing: The sealing strips prepared above are fed into a cutting device, and then the cutting device is operated to cut the sealing strips. The cut sealing strips are then rolled together and sent to the warehouse.

[0032] The glass fiber powder used in Examples 1, 2 and 3 is different, but the other parameters are the same. Through the testing of the strength, elasticity and sealing performance of the sealing strip, it can be seen that Example 1 has the best effect.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for manufacturing a composite waterproof sealing rubber strip, characterized in that: The composite waterproof sealing rubber strip includes an inner core (1), an outer sleeve (2) is fitted over the inner core (1), the outer sleeve (2) includes a rubber layer (5), the rubber layer (5) is coated with a paint layer (6), and the paint layer (6) is coated with a flame retardant layer (7). An injection hole (8) is provided on one side of the top outer wall of the outer sleeve (2). The inner core (1) includes a core body (3), the outer wall of the side of the core body (3) is coated with an adhesive (4), and the adhesive (4) is bonded to the rubber layer (5). The inner core (1) is composed of the following parts by weight of raw materials: Fluorosilicone rubber 30-40 parts, nitrile rubber 30-40 parts, acrylic rubber 30-40 parts, glass fiber powder 10-15 parts, high styrene 15-20 parts, benzoic acid 8-12 parts, vulcanizing agent 2-3 parts, antioxidant 2-3 parts, accelerator 0.5-1 part, plasticizer 1-1.5 parts, antioxidant 1-2 parts; The rubber layer (5) is composed of the following raw materials in parts by weight: 45-60 parts silicone rubber, 20-30 parts EPDM rubber, 5-20 parts reinforcing agent, 3-5 parts tripropylene isocyanurate, 5-6 parts active zinc oxide, 1-2 parts stearic acid, 2-3 parts vulcanizing agent, 2-3 parts antioxidant, 0.5-1 part accelerator, 1-1.5 parts plasticizer, and 1-2 parts antioxidant; The preparation of the composite waterproof sealing rubber strip includes the following steps: S1. Material selection: Select the appropriate materials according to the inner core (1) and rubber layer (5), weigh the materials using a weighing device, and then classify and place the weighed materials on the corresponding carts; S2. Material mixing: Pour the two prepared materials into the mixing equipment, and then pre-treat them through a high-speed mixer to make them more plastic. S3. Extrusion molding: The die head of the extruder is fitted with a die, and then the mixed rubber raw material is put into the extruder. Then, by rotating the screw, the rubber material is moved towards the die head to extrude the shape of the sealing strip. Then, it is cooled by cold water to obtain the molded inner core (1) and rubber layer (5). S4. Vulcanization treatment: The extruded inner core (1) and rubber layer (5) are sent into the drying tunnel for high-temperature vulcanization and characterization; S5. Adhesive injection assembly: The rubber layer (5) is pulled into the spray painting equipment, then sprayed, and then heated and dried to form the paint layer (6) and flame retardant layer (7), so that the rubber layer (5) becomes the outer jacket (2). Then the inner core (1) is inserted into the outer jacket (2), and adhesive (4) is injected between the inner core (1) and the outer jacket (2) through the adhesive injection hole (8) to bond the inner core (1) and the outer jacket (2) together. The drying equipment is used to dry the rubber during the adhesive injection process. S6. Cutting and finishing: The sealing strips prepared in steps S1-S5 above are fed into a cutting device, and then the cutting device is operated to cut the sealing strips. The cut sealing strips are then rolled together and sent to the warehouse.

2. The method for manufacturing a composite waterproof sealing rubber strip according to claim 1, characterized in that: The temperature of the inner core (1) material in S2 should be controlled at 120-150℃ and the mixing time should be between 20-40min.

3. The method for manufacturing a composite waterproof sealing rubber strip according to claim 1, characterized in that: The initial temperature of the rubber layer (5) material in S2 during mixing is 170-180℃, and the final temperature is controlled at 180-190℃. The temperature rise rate is 5-10℃ / min, and the temperature is maintained for 10-30min within this temperature range.

4. The method for manufacturing a composite waterproof sealing rubber strip according to claim 1, characterized in that: The core (1) material in S3 is extruded at a traction speed of 12-15 m / min and the temperature of the rubber material in the extruder head is 100-120℃.

5. The method for manufacturing a composite waterproof sealing rubber strip according to claim 1, characterized in that: The rubber layer (5) material in S3 is extruded at a traction speed of 10-13 m / min and the temperature of the rubber material inside the extruder head is 110-130℃.

6. The method for manufacturing a composite waterproof sealing rubber strip according to claim 1, characterized in that: The cooling time for the cold water in S3 is 20-40 minutes.

7. The method for manufacturing a composite waterproof sealing rubber strip according to claim 1, characterized in that: The vulcanization temperature in S4 is 150-180℃, and the time is 100-150 seconds.

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