Bonding processing treatment process for rubber product manufacturing

Abstract

The invention relates to the technical field of rubber product manufacturing and bonding, and discloses a rubber product manufacturing and bonding processing treatment process, which comprises the following steps: selecting proper natural rubber or synthetic rubber according to the application and requirements of a product, preparing a compounding agent, and carrying out mechanical plastication or thermal plastication on raw rubber to obtain a rubber product; the preparation method comprises the following steps: plasticating raw rubber, uniformly mixing the plasticated raw rubber with various compounding agents in a rubber mixing mill to prepare a rubber compound, selecting a proper forming method according to the shape and size of a product, manufacturing a corresponding mold, putting the rubber compound into the mold, and heating and pressurizing to form the rubber compound. According to the invention, by selecting a proper adhesive and a proper bonding process, firm bonding between rubber and metal or other materials can be ensured, and a new bonding processing process can ensure the sealing performance between a rubber product and a connecting part, so that liquid or gas leakage is prevented; the stress distribution between the rubber product and the connecting part is more uniform, and the stress concentration phenomenon is reduced, so that the product performance and quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber product manufacturing and bonding, in particular to a rubber product manufacturing and bonding processing technology. Background Art

[0002] Rubber products refer to various products made from natural rubber or synthetic rubber through a series of processing processes. Natural rubber is latex collected from rubber trees and processed through coagulation and drying. It has good elasticity, wear resistance, cold resistance and insulation. Synthetic rubber is produced through chemical synthesis methods and its output has greatly exceeded that of natural rubber. It includes styrene-butadiene rubber, butadiene rubber, chloroprene rubber, nitrile rubber, silicone rubber, fluororubber, etc., with different physical and chemical properties to meet the needs of different fields. Rubber products have good elasticity and can withstand tension and compression within a certain range without breaking. They have good wear resistance and can be used for long periods of time under friction without damage. They can maintain good elasticity and mechanical properties under low temperature conditions. They have good insulation properties and are not easy to conduct electricity. They can be made into various seals to prevent liquid or gas leakage. Rubber products are widely used in various fields. As an important industrial product, rubber products play an irreplaceable role in modern society. With the continuous advancement of science and technology and the improvement of environmental awareness, the rubber products industry will usher in a broader development prospect.

[0003] In the production of rubber products, bonding technology plays a vital role. Many rubber products, such as tires, seals, shock absorbers, etc., require strong bonding of rubber to rubber, rubber to metal, rubber to fiber textile materials, etc. to ensure the overall performance and service life of the products. Weak bonding will lead to problems such as cracking and falling off during use of the products, seriously affecting the quality and reliability of the products. Therefore, a new processing technology is now proposed to solve this technical problem. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a rubber product manufacturing bonding processing technology, which has the advantages of improving product performance and quality, and solves the problem that traditional preparation methods seriously affect the quality and reliability of products.

[0006] (2) Technical solution

[0007] To achieve the purpose of improving product performance and quality mentioned in the above background technology, the present invention provides the following technical solution: a rubber product manufacturing bonding processing process, comprising the following steps:

[0008] Step 1: Select appropriate natural rubber or synthetic rubber according to the purpose and requirements of the product and prepare the compounding agent;

[0009] Step 2: Mechanically or thermally plasticize the raw rubber, and evenly mix the plasticized raw rubber with various compounding agents in a rubber mixer to prepare a rubber mix;

[0010] Step 3: According to the shape and size of the product, select the appropriate molding method, make the corresponding mold, put the mixed rubber into the mold, and shape it by heating and pressurizing;

[0011] Step 4: Surface treatment is performed on the parts that need to be bonded, and appropriate bonding methods are selected according to the purpose and requirements of the product to perform bonding treatment;

[0012] Step 5: Select the appropriate vulcanizing agent according to the type of rubber and product requirements, and place the molded rubber product into the vulcanizing tank for vulcanization;

[0013] Step 6: Cool and trim the product, remove excess scraps and burrs, and conduct appearance inspection and performance testing;

[0014] Step 7: Package the qualified rubber products and store them in a cool, dry place, avoiding direct sunlight and high temperature environment.

[0015] Preferably, the formula and proportion of raw materials are determined according to the performance requirements and production process of rubber products, and the raw materials are tested, accurately weighed, pretreated, mixed and stored to ensure the quality of raw materials, the selection and dosage of compounding agents, and environmental protection and safety.

[0016] Formula determination: According to the performance requirements and production process of rubber products, the formula and proportion of raw materials are determined. The accuracy of the formula directly affects the performance of the finished rubber products.

[0017] Raw material testing: Conduct physical and chemical property tests on purchased raw materials to ensure that the quality of raw materials meets production requirements;

[0018] Accurate weighing: According to the formula requirements, accurately weigh various raw materials to ensure the accuracy of the ratio;

[0019] Pretreatment: Processing of raw materials that require pretreatment, such as softening, cutting and breaking of raw rubber, crushing, screening and drying of compounding agents;

[0020] Mixing and storage: Mix the pre-treated raw materials according to the formula requirements and store them in a dry, ventilated and light-proof environment to prevent the raw materials from getting damp and deteriorating;

[0021] Raw material quality: The quality of raw materials directly affects the performance and quality of rubber products. During the raw material preparation process, the quality of raw materials should be strictly controlled to ensure that the raw materials meet production requirements;

[0022] Selection and dosage of compounding agents: The selection and dosage of compounding agents should be precisely controlled according to the performance requirements of rubber products. Excessive compounding agents may cause the performance of rubber products to deteriorate and even affect the safety of the products.

[0023] Environmental protection and safety: Avoid the generation of waste gas, wastewater and solid waste that may pollute the environment. At the same time, necessary safety measures should be taken for flammable, explosive and other dangerous chemicals to ensure the personal safety of workers.

[0024] Preferably, the plasticating methods mainly include mechanical plasticating and hot plasticating. Commonly used plasticating equipment includes open rubber mixers, closed rubber mixers and screw plasticators. Mixing is to mix the plasticized raw rubber with various compounding agents to make a mixed rubber. The methods include open rubber mixer mixing and internal mixer mixing, and are strictly carried out in accordance with the mixing process conditions.

[0025] Mechanical plasticating: Under not too high a temperature, the long-chain rubber molecules are degraded and shortened through the mechanical extrusion and friction of the plasticating machine, and the highly elastic state is transformed into a plastic state.

[0026] Hot plasticizing: Hot compressed air is introduced into the raw rubber. Under the action of heat and oxygen, the long chain molecules are degraded and shortened, thus obtaining plasticity.

[0027] Open rubber mixing machine: The temperature during plastication is generally below 80℃, which is a low-temperature mechanical mixing method. During plastication, it is necessary to pay attention to controlling the temperature, mixing distance, rubber loading amount, and mixing time factors;

[0028] Internal mixer: The temperature during plasticating is relatively high, usually above 120℃, and even as high as 160-180℃. It is a high-temperature mechanical mixing machine. The internal mixer has high plasticating efficiency and is suitable for large-scale production. During plasticating, it is necessary to pay attention to controlling the upper bolt pressure, rotor speed, mixing time, and mixing temperature factors;

[0029] Screw plasticator: The raw rubber is subjected to the mechanical shearing action of the screw in the screw plasticator, and is also subjected to the friction between the screw and the inner wall of the machine body, which generates a large amount of heat energy and accelerates oxidation and cracking, thereby achieving the plasticizing effect. During plasticating, it is necessary to pay attention to controlling the temperature of the machine shell and the head.

[0030] Preferably, in the manufacturing and bonding process of the rubber product, a suitable molding method is selected according to the shape and size of the product, and a corresponding mold is made, wherein the molding methods include compression molding, extrusion molding, injection molding, and calendering molding, and the mold is first designed and drawn, and then the material is selected, processed and manufactured, and the quality is tested;

[0031] After the mold is made, the rubber mix is ​​placed in the mold and formed by heating and pressurizing. The main steps are rubber mix preparation, mold preheating, rubber mix placement and mold closing, heating and pressurizing, and then opening the mold to take out the parts to complete the production.

[0032] Compression molding: With the help of formed female and male molds, the rubber mix is ​​placed in the mold and formed by heating and pressurizing. The mold structure is simple, versatile, easy to operate, and the geometric shape and dimensional accuracy of the product are high;

[0033] Extrusion molding: The mixed rubber is continuously extruded into shape through a rubber extruder. Features: high production efficiency, stable quality, and the ability to achieve automated production;

[0034] Injection molding: The mixed rubber is injected into the mold through an injection machine and formed by heating and pressurizing. It has a short molding cycle, high production efficiency, low labor intensity, and a high degree of mechanization and automation.

[0035] Calendering: The mixed rubber is passed through a calender to be pressed into a film of a certain thickness and width. The process is simple, easy to operate, and suitable for large-scale production.

[0036] Design and drawing: Design the mold according to the shape and size of the rubber product and draw the mold drawings, including the mold structure, size, and material;

[0037] Material selection: Select appropriate mold material according to the mold's usage requirements and working environment;

[0038] Processing and manufacturing: Use CNC machine tools, milling machines, and grinding machines to process and manufacture according to mold drawings, strictly control the processing accuracy and surface quality of the mold to ensure the geometric shape and dimensional accuracy of the product;

[0039] Quality inspection: Conduct quality inspection on the finished molds, including dimensional measurement and material performance testing;

[0040] Rubber mix preparation: Cut or preform the mixed rubber into the specified size and shape to ensure the uniformity and plasticity of the rubber mix to meet the molding requirements;

[0041] Mold preheating: Before the rubber mix is ​​placed into the mold, the mold is preheated. The preheating temperature depends on the type of rubber product and the mold material, and usually fluctuates within a certain range.

[0042] Add the rubber mix and close the mold: Place the rubber mix into the mold, ensure that the rubber is evenly distributed and fills the mold cavity, close the mold, and prepare for heating and pressurization;

[0043] Heating and pressurizing molding: Under the action of heat and pressure, the rubber mix undergoes a vulcanization reaction in the mold and gradually solidifies into shape. The heating temperature and pressure depend on the type of rubber product and the mold material, and usually fluctuate within a certain range. The molding time depends on the thickness and size of the rubber product, and usually ranges from a few minutes to a few hours.

[0044] Open the mold and take out the product: After the rubber product is completely cured and formed, open the mold and take out the product, and perform preliminary quality inspection on the product, such as appearance inspection and size measurement.

[0045] Preferably, in the manufacturing bonding processing technology of rubber products, the parts that need to be bonded are surface treated, and the treatment methods include grinding, sandblasting, solvent cleaning, chemical etching, and plasma oxidation, and the bonding methods include cold bonding with glue, hot vulcanization bonding, hot melt adhesive method, and epoxy resin method.

[0046] Grinding method: Use tools such as emery cloth, files, wire brushes, etc. to grind the bonding parts to remove surface oxide layers, oil stains, dust and other pollutants, increase surface roughness, and improve bonding strength;

[0047] Sand blasting: uses high-speed airflow to spray abrasives onto the surface of the bonding part to remove surface pollutants and oxide layers and increase surface roughness;

[0048] Solvent cleaning method: Use organic solvent to clean the surface of the bonding part to remove oil, dust and other pollutants on the surface;

[0049] Chemical etching method: Use chemical reagents to etch the surface of the bonding area to generate polar groups such as cyclized rubber and chlorinated rubber, increase the chemical activity of the surface, and enhance the bonding strength. For natural rubber, the surface can be treated with concentrated sulfuric acid to generate cyclized rubber. For synthetic rubber, it can be treated with concentrated sulfuric acid and then neutralized with ammonia to improve the bonding strength.

[0050] Plasma oxidation method: using the oxidation effect of plasma to oxidize the surface of the bonding part, increase the polar groups on the surface, improve the chemical activity of the surface, and enhance the bonding strength;

[0051] Cold glue bonding: A layer of special glue is applied to the bonding area, and a certain amount of pressure is applied to allow the glue to penetrate the surface of the rubber product to form a strong bond;

[0052] Hot vulcanization bonding: Raw rubber, special glue, etc. are added to the rubber at the joint. A series of complex chemical reactions occur in the shaping mold under certain pressure and temperature conditions, so that the joint of the rubber product changes from a linear structure to a three-dimensional structure, obtaining excellent physical and mechanical properties, heat resistance, solvent resistance and corrosion resistance;

[0053] Hot melt glue method: Apply hot melt glue to the surface of the rubber material, then quickly splice the two rubber surfaces together. After the glue cools and solidifies, a strong bond is formed;

[0054] Epoxy resin method: Use epoxy resin to apply on the surface of rubber material, then place two rubber surfaces together and solidify them under pressure to form a bond with high bonding strength and good durability.

[0055] Preferably, the vulcanization is the process of converting plastic rubber into elastic vulcanized rubber. Through vulcanization, cross-linking reactions occur between rubber molecular chains to form a three-dimensional network structure, thereby improving the physical and mechanical properties of rubber products such as elasticity, hardness, tensile strength, wear resistance and aging resistance. It is divided into the influencing factors of vulcanization, vulcanization process and vulcanization precautions.

[0056] Factors affecting vulcanization include the choice of vulcanizing agent: select the appropriate vulcanizing agent according to the type of rubber and the performance requirements of the product;

[0057] Vulcanization temperature: Vulcanization temperature is a key factor affecting the vulcanization speed and vulcanized rubber performance. As the temperature rises, the vulcanization speed increases and the vulcanization time shortens. Excessively high temperature may cause the rubber molecular chain to crack, affecting the product performance;

[0058] Curing time: The length of curing time directly affects the degree of curing reaction and the performance of the product. If the curing time is too short, the curing is insufficient and the product performance is poor. If the curing time is too long, it may lead to over-curing, which will also affect the product performance.

[0059] Vulcanization pressure: Vulcanization pressure can prevent bubbles from forming in the rubber compound, improve the density of the rubber compound, and enhance the adhesion between the layers in the product. However, excessive pressure may cause deformation of the product or damage the mold.

[0060] The vulcanization process includes the preparation before vulcanization: placing the molded rubber product into the vulcanization tank or other vulcanization equipment, ensuring that the interior of the vulcanization equipment is clean and free of debris to avoid affecting the vulcanization effect;

[0061] Vulcanization process: According to the type of rubber and the performance requirements of the product, set the appropriate vulcanization temperature, time and pressure, and start the vulcanization equipment to start the vulcanization process. During the vulcanization process, pay close attention to the operating status of the vulcanization equipment and the vulcanization status of the product;

[0062] Post-vulcanization treatment: After vulcanization is completed, turn off the vulcanization equipment and let the product cool naturally to room temperature in the vulcanization equipment. Take out the product and perform necessary post-treatment, such as trimming and polishing.

[0063] Preferably, the main purpose of the finishing treatment is to remove excess scraps, burrs, and glue overflow defects generated during the processing of the product, so that the appearance of the product is neater and more beautiful, while improving the precision and dimensional stability of the product. The processing methods are divided into manual finishing and mechanical finishing, and the inspection is further divided into appearance inspection, dimensional measurement, and physical property testing, and the inspection methods are divided into visual inspection method, measuring tool method, and physical property testing equipment method.

[0064] Manual finishing: For small or complex-shaped products, manual finishing is a common method. Workers can use tools such as knives and sandpaper to finely polish and trim the products.

[0065] Mechanical finishing: For products produced in large quantities or with regular shapes, mechanical finishing can improve efficiency and precision. Commonly used mechanical finishing equipment includes grinding wheel edgers, circular knife trimmers, and water jet cutters to remove excess scraps and burrs.

[0066] Appearance inspection: mainly check whether the surface of the product is flat and smooth, whether there are defects such as bubbles, cracks, impurities, whether the color and texture of the product meet the requirements, and whether the product logo is clear and complete;

[0067] Dimension measurement: Use star measuring tools to accurately measure the dimensions of the product, including key dimensions such as length, width, height, and wall thickness. The measurement results should be compared with the product design requirements to ensure that the product dimensions meet the standards;

[0068] Physical performance test: According to the purpose and requirements of the product, select the corresponding physical performance test items for testing. Common test items include hardness test, tensile strength test, tear strength test, abrasion resistance test, and heat resistance test;

[0069] Visual inspection method: For appearance inspection, visual inspection method can be used. The inspector should have certain experience and skills to accurately identify defects and non-conformities on the surface of the product;

[0070] Measuring tool method: For dimensional measurement, appropriate measuring tools should be used for accurate measurement. Commonly used measuring tools include vernier calipers, micrometers, and projectors.

[0071] Physical performance testing equipment method: For physical performance testing, professional testing equipment should be used for testing.

[0072] Preferably, in the manufacturing and bonding processing process, packaging and storage can ensure the final quality of the product and extend its service life, which includes the selection of packaging materials, packaging methods, and the selection of storage environment, storage methods, regular inspection and maintenance, and attention to moisture-proof and mildew-proof, and avoiding long-term pressure.

[0073] Selection of packaging materials: Choose packaging materials suitable for rubber products, such as plastic bags, bubble wrap, and cartons, to ensure that the products are not damaged during transportation and storage. The packaging materials should have good moisture-proof and dust-proof properties to prevent the products from getting damp or contaminated with dust;

[0074] Packaging method: Choose the appropriate packaging method based on the shape, size and characteristics of the rubber product. For small products, you can put them individually or in groups into plastic bags and seal the bag openings. For large or irregularly shaped products, you can use bubble film or foam board to wrap them and then put them into cartons to secure them. During the packaging process, care should be taken to avoid collision or squeezing between products to avoid damage.

[0075] Storage environment selection: Store packaged rubber products in a cool, dry place, away from direct sunlight and high temperature environment. The storage area should be away from heat sources, fire sources and chemicals to prevent the products from being deformed by heat or chemical reactions;

[0076] Storage method: Choose the appropriate storage method according to the shape and size of the product. For small products, they can be stacked neatly, but be careful not to stack them too high to avoid crushing the bottom products. For large or irregularly shaped products, they should be stored separately or supported by a stand.

[0077] Regular inspection and maintenance: Regularly inspect stored rubber products. If any packaging damage or product deformation is found, they should be dealt with promptly. Keep the storage area clean and hygienic, and regularly clean dust and debris to prevent the products from being contaminated.

[0078] Moisture-proof and mildew-proof: Rubber products are susceptible to moisture and mildew, so the storage environment should be kept dry. If necessary, use a desiccant or dehumidifier to dehumidify;

[0079] Avoid long-term pressure: Long-term pressure may cause rubber products to deform or be damaged. The storage space should be arranged reasonably to avoid unnecessary pressure on the products.

[0080] Compared with the prior art, the present invention provides a rubber product manufacturing bonding processing process, which has the following beneficial effects:

[0081] 1. The present invention can ensure a strong bond between rubber and metal or other materials by selecting a suitable adhesive and bonding process. The new bonding processing technology can ensure the sealing between the rubber product and the connecting component, prevent liquid or gas leakage, make the stress distribution between the rubber product and the connecting component more uniform, reduce stress concentration, and thus improve product performance and quality.

[0082] 2. The present invention can combine multiple components into a whole through bonding processing, reducing the number of parts and assembly steps, thereby simplifying the production process and improving production efficiency.

[0083] 3. The present invention can combine multiple components into a whole through bonding processing, thereby reducing the use of raw materials and lowering costs. Since the bonding processing can improve the overall strength and durability of the product, it can extend the service life of the product, reduce the replacement frequency, and thus reduce the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0085] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0086] See also Figure 1 , a rubber product manufacturing bonding processing process, comprising the following steps:

[0087] Step 1: Select appropriate natural rubber or synthetic rubber according to the purpose and requirements of the product and prepare the compounding agent;

[0088] Step 2: Mechanically or thermally plasticize the raw rubber, and evenly mix the plasticized raw rubber with various compounding agents in a rubber mixer to prepare a rubber mix;

[0089] Step 3: According to the shape and size of the product, select the appropriate molding method, make the corresponding mold, put the mixed rubber into the mold, and shape it by heating and pressurizing;

[0090] Step 4: Surface treatment is performed on the parts that need to be bonded, and appropriate bonding methods are selected according to the purpose and requirements of the product to perform bonding treatment;

[0091] Step 5: Select the appropriate vulcanizing agent according to the type of rubber and product requirements, and place the molded rubber product into the vulcanizing tank for vulcanization;

[0092] Step 6: Cool and trim the product, remove excess scraps and burrs, and conduct appearance inspection and performance testing;

[0093] Step 7: Package the qualified rubber products and store them in a cool, dry place, avoiding direct sunlight and high temperature environment.

[0094] Specifically, such as Figure 1 As shown, the formula and proportion of raw materials are determined according to the performance requirements and production process of rubber products, and the raw materials are tested, accurately weighed, pretreated, mixed and stored to ensure the quality of raw materials, the selection and dosage of compounding agents, and environmental protection and safety.

[0095] Through the above technical solution, the formula is determined: according to the performance requirements and production process of rubber products, the formula and proportion of raw materials are determined. The accuracy of the formula directly affects the performance superiority of the finished rubber products;

[0096] Raw material testing: Conduct physical and chemical property tests on purchased raw materials to ensure that the quality of raw materials meets production requirements;

[0097] Accurate weighing: According to the formula requirements, accurately weigh various raw materials to ensure the accuracy of the ratio;

[0098] Pretreatment: Processing of raw materials that require pretreatment, such as softening, cutting and breaking of raw rubber, crushing, screening and drying of compounding agents;

[0099] Mixing and storage: Mix the pre-treated raw materials according to the formula requirements and store them in a dry, ventilated and light-proof environment to prevent the raw materials from getting damp and deteriorating;

[0100] Raw material quality: The quality of raw materials directly affects the performance and quality of rubber products. During the raw material preparation process, the quality of raw materials should be strictly controlled to ensure that the raw materials meet production requirements;

[0101] Selection and dosage of compounding agents: The selection and dosage of compounding agents should be precisely controlled according to the performance requirements of rubber products. Excessive compounding agents may cause the performance of rubber products to deteriorate and even affect the safety of the products.

[0102] Environmental protection and safety: Avoid the generation of waste gas, wastewater and solid waste that may pollute the environment. At the same time, necessary safety measures should be taken for flammable, explosive and other dangerous chemicals to ensure the personal safety of workers.

[0103] Specifically, such as Figure 1 As shown, the plasticating methods mainly include mechanical plasticating and hot plasticating. Commonly used plasticating equipment includes open rubber mixers, closed rubber mixers and screw plasticators. Mixing is to mix the plasticized raw rubber with various compounding agents to make a mixed rubber. The methods include open rubber mixer mixing and internal mixer mixing, and are strictly carried out in accordance with the mixing process conditions.

[0104] Through the above technical solution, mechanical plastication: at a not too high temperature, through the mechanical extrusion and friction of the plasticator, the long-chain rubber molecules are degraded and shortened, and the highly elastic state is transformed into a plastic state;

[0105] Hot plasticizing: Hot compressed air is introduced into the raw rubber. Under the action of heat and oxygen, the long chain molecules are degraded and shortened, thus obtaining plasticity.

[0106] Open rubber mixing machine: The temperature during plastication is generally below 80℃, which is a low-temperature mechanical mixing method. During plastication, it is necessary to pay attention to controlling the temperature, mixing distance, rubber loading amount, and mixing time factors;

[0107] Internal mixer: The temperature during plasticating is relatively high, usually above 120℃, and even as high as 160-180℃. It is a high-temperature mechanical mixing machine. The internal mixer has high plasticating efficiency and is suitable for large-scale production. During plasticating, it is necessary to pay attention to controlling the upper bolt pressure, rotor speed, mixing time, and mixing temperature factors;

[0108] Screw plasticator: The raw rubber is subjected to the mechanical shearing action of the screw in the screw plasticator, and is also subjected to the friction between the screw and the inner wall of the machine body, which generates a large amount of heat energy and accelerates oxidation and cracking, thereby achieving the plasticizing effect. During plasticating, it is necessary to pay attention to controlling the temperature of the machine shell and the head.

[0109] Specifically, such as Figure 1 As shown, in the manufacturing and bonding process of rubber products, a suitable molding method is selected according to the shape and size of the product, and a corresponding mold is made. The molding methods include compression molding, extrusion molding, injection molding, and calendering molding. The mold is first designed and drawn, and then the material is selected, processed and manufactured, and the quality is tested.

[0110] After the mold is made, the rubber mix is ​​placed in the mold and formed by heating and pressurizing. The main steps are rubber mix preparation, mold preheating, rubber mix placement and mold closing, heating and pressurizing, and then opening the mold to take out the parts to complete the production.

[0111] Through the above technical solution, compression molding: with the help of the formed female and male molds, the mixed rubber is placed in the mold and formed by heating and pressurizing. The mold structure is simple, versatile, easy to operate, and the geometric shape and dimensional accuracy of the product are high;

[0112] Extrusion molding: The mixed rubber is continuously extruded into shape through a rubber extruder. Features: high production efficiency, stable quality, and the ability to achieve automated production;

[0113] Injection molding: The mixed rubber is injected into the mold through an injection machine and formed by heating and pressurizing. It has a short molding cycle, high production efficiency, low labor intensity, and a high degree of mechanization and automation.

[0114] Calendering: The mixed rubber is passed through a calender to be pressed into a film of a certain thickness and width. The process is simple, easy to operate, and suitable for large-scale production.

[0115] Design and drawing: Design the mold according to the shape and size of the rubber product and draw the mold drawings, including the mold structure, size, and material;

[0116] Material selection: Select appropriate mold material according to the mold's usage requirements and working environment;

[0117] Processing and manufacturing: Use CNC machine tools, milling machines, and grinding machines to process and manufacture according to mold drawings, strictly control the processing accuracy and surface quality of the mold to ensure the geometric shape and dimensional accuracy of the product;

[0118] Quality inspection: Conduct quality inspection on the finished molds, including dimensional measurement and material performance testing;

[0119] Rubber mix preparation: Cut or preform the mixed rubber into the specified size and shape to ensure the uniformity and plasticity of the rubber mix to meet the molding requirements;

[0120] Mold preheating: Before the rubber mix is ​​placed into the mold, the mold is preheated. The preheating temperature depends on the type of rubber product and the mold material, and usually fluctuates within a certain range.

[0121] Add the rubber mix and close the mold: Place the rubber mix into the mold, ensure that the rubber is evenly distributed and fills the mold cavity, close the mold, and prepare for heating and pressurization;

[0122] Heating and pressurizing molding: Under the action of heat and pressure, the rubber mix undergoes a vulcanization reaction in the mold and gradually solidifies into shape. The heating temperature and pressure depend on the type of rubber product and the mold material, and usually fluctuate within a certain range. The molding time depends on the thickness and size of the rubber product, and usually ranges from a few minutes to a few hours.

[0123] Open the mold and take out the product: After the rubber product is completely cured and formed, open the mold and take out the product, and perform preliminary quality inspection on the product, such as appearance inspection and size measurement.

[0124] Specifically, such as Figure 1 As shown, in the manufacturing bonding processing technology of rubber products, the parts that need to be bonded are surface treated, and the treatment methods include grinding, sandblasting, solvent cleaning, chemical etching, and plasma oxidation, and the bonding methods include cold bonding with glue, hot vulcanization bonding, hot melt adhesive method, and epoxy resin method.

[0125] Through the above technical solution, grinding method: use tools such as emery cloth, file, wire brush to grind the bonding part to remove surface oxide layer, oil, dust and other pollutants, increase surface roughness and improve bonding strength;

[0126] Sand blasting: uses high-speed airflow to spray abrasives onto the surface of the bonding part to remove surface pollutants and oxide layers and increase surface roughness;

[0127] Solvent cleaning method: Use organic solvent to clean the surface of the bonding part to remove oil, dust and other pollutants on the surface;

[0128] Chemical etching method: Use chemical reagents to etch the surface of the bonding area to generate polar groups such as cyclized rubber and chlorinated rubber, increase the chemical activity of the surface, and enhance the bonding strength. For natural rubber, the surface can be treated with concentrated sulfuric acid to generate cyclized rubber. For synthetic rubber, it can be treated with concentrated sulfuric acid and then neutralized with ammonia to improve the bonding strength.

[0129] Plasma oxidation method: using the oxidation effect of plasma to oxidize the surface of the bonding part, increase the polar groups on the surface, improve the chemical activity of the surface, and enhance the bonding strength;

[0130] Cold glue bonding: A layer of special glue is applied to the bonding area, and a certain amount of pressure is applied to allow the glue to penetrate the surface of the rubber product to form a strong bond;

[0131] Hot vulcanization bonding: Raw rubber, special glue, etc. are added to the rubber at the joint. A series of complex chemical reactions occur in the shaping mold under certain pressure and temperature conditions, so that the joint of the rubber product changes from a linear structure to a three-dimensional structure, obtaining excellent physical and mechanical properties, heat resistance, solvent resistance and corrosion resistance;

[0132] Hot melt glue method: Apply hot melt glue to the surface of the rubber material, then quickly splice the two rubber surfaces together. After the glue cools and solidifies, a strong bond is formed;

[0133] Epoxy resin method: Use epoxy resin to apply on the surface of rubber material, then place two rubber surfaces together and solidify them under pressure to form a bond with high bonding strength and good durability.

[0134] Specifically, such as Figure 1 As shown, vulcanization is the process of converting plastic rubber into elastic vulcanized rubber. Through vulcanization, cross-linking reactions occur between rubber molecular chains to form a three-dimensional network structure, thereby improving the physical and mechanical properties of rubber products such as elasticity, hardness, tensile strength, wear resistance and aging resistance. It is divided into the influencing factors of vulcanization, vulcanization process and vulcanization precautions.

[0135] Through the above technical solution, factors affecting vulcanization include the selection of vulcanizing agent: according to the type of rubber and the performance requirements of the product, a suitable vulcanizing agent is selected;

[0136] Vulcanization temperature: Vulcanization temperature is a key factor affecting the vulcanization speed and vulcanized rubber performance. As the temperature rises, the vulcanization speed increases and the vulcanization time shortens. Excessively high temperature may cause the rubber molecular chain to crack, affecting the product performance;

[0137] Curing time: The length of curing time directly affects the degree of curing reaction and the performance of the product. If the curing time is too short, the curing is insufficient and the product performance is poor. If the curing time is too long, it may lead to over-curing, which will also affect the product performance.

[0138] Vulcanization pressure: Vulcanization pressure can prevent bubbles from forming in the rubber compound, improve the density of the rubber compound, and enhance the adhesion between the layers in the product. However, excessive pressure may cause deformation of the product or damage the mold.

[0139] The vulcanization process includes the preparation before vulcanization: placing the molded rubber product into the vulcanization tank or other vulcanization equipment, ensuring that the interior of the vulcanization equipment is clean and free of debris to avoid affecting the vulcanization effect;

[0140] Vulcanization process: According to the type of rubber and the performance requirements of the product, set the appropriate vulcanization temperature, time and pressure, and start the vulcanization equipment to start the vulcanization process. During the vulcanization process, pay close attention to the operating status of the vulcanization equipment and the vulcanization status of the product;

[0141] Post-vulcanization treatment: After vulcanization is completed, turn off the vulcanization equipment and let the product cool naturally to room temperature in the vulcanization equipment. Take out the product and perform necessary post-treatment, such as trimming and polishing.

[0142] Specifically, such as Figure 1 As shown, the main purpose of the finishing treatment is to remove excess scraps, burrs, and glue overflow defects generated during the processing of the product, so that the appearance of the product is neater and more beautiful, while improving the precision and dimensional stability of the product. The processing methods are divided into manual finishing and mechanical finishing, and the inspection is further divided into appearance inspection, dimensional measurement, and physical property testing. The inspection methods are divided into visual inspection method, measuring tool method, and physical property testing equipment method.

[0143] Through the above technical solution, manual finishing: For small or complex-shaped products, manual finishing is a common method. Workers can use tools such as knives and sandpaper to finely grind and trim the products;

[0144] Mechanical finishing: For products produced in large quantities or with regular shapes, mechanical finishing can improve efficiency and precision. Commonly used mechanical finishing equipment includes grinding wheel edgers, circular knife trimmers, and water jet cutters to remove excess scraps and burrs.

[0145] Appearance inspection: mainly check whether the surface of the product is flat and smooth, whether there are defects such as bubbles, cracks, impurities, whether the color and texture of the product meet the requirements, and whether the product logo is clear and complete;

[0146] Dimension measurement: Use star measuring tools to accurately measure the dimensions of the product, including key dimensions such as length, width, height, and wall thickness. The measurement results should be compared with the product design requirements to ensure that the product dimensions meet the standards;

[0147] Physical performance test: According to the purpose and requirements of the product, select the corresponding physical performance test items for testing. Common test items include hardness test, tensile strength test, tear strength test, abrasion resistance test, and heat resistance test;

[0148] Visual inspection method: For appearance inspection, visual inspection method can be used. The inspector should have certain experience and skills to accurately identify defects and non-conformities on the surface of the product;

[0149] Measuring tool method: For dimensional measurement, appropriate measuring tools should be used for accurate measurement. Commonly used measuring tools include vernier calipers, micrometers, and projectors.

[0150] Physical performance testing equipment method: For physical performance testing, professional testing equipment should be used for testing.

[0151] Specifically, such as Figure 1 As shown, in the manufacturing and bonding processing, packaging and storage can ensure the final quality of the product and extend its service life, which includes the selection of packaging materials, packaging methods, storage environment selection, storage methods, regular inspection and maintenance, and attention to moisture-proof and mildew-proof, and avoid long-term pressure.

[0152] Based on the above technical solution, packaging material selection: Choose packaging materials suitable for rubber products, such as plastic bags, bubble wrap, and cartons to ensure that the products are not damaged during transportation and storage. The packaging materials should have good moisture-proof and dust-proof properties to prevent the products from getting damp or contaminated with dust;

[0153] Packaging method: Choose the appropriate packaging method based on the shape, size and characteristics of the rubber product. For small products, you can put them individually or in groups into plastic bags and seal the bag openings. For large or irregularly shaped products, you can use bubble film or foam board to wrap them and then put them into cartons to secure them. During the packaging process, care should be taken to avoid collision or squeezing between products to avoid damage.

[0154] Storage environment selection: Store packaged rubber products in a cool, dry place, away from direct sunlight and high temperature environment. The storage area should be away from heat sources, fire sources and chemicals to prevent the products from being deformed by heat or chemical reactions;

[0155] Storage method: Choose the appropriate storage method according to the shape and size of the product. For small products, they can be stacked neatly, but be careful not to stack them too high to avoid crushing the bottom products. For large or irregularly shaped products, they should be stored separately or supported by a stand.

[0156] Regular inspection and maintenance: Regularly inspect stored rubber products. If any packaging damage or product deformation is found, they should be dealt with promptly. Keep the storage area clean and hygienic, and regularly clean dust and debris to prevent the products from being contaminated.

[0157] Moisture-proof and mildew-proof: Rubber products are susceptible to moisture and mildew, so the storage environment should be kept dry. If necessary, use a desiccant or dehumidifier to dehumidify;

[0158] Avoid long-term pressure: Long-term pressure may cause rubber products to deform or be damaged. The storage space should be arranged reasonably to avoid unnecessary pressure on the products.

[0159] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rubber product manufacturing bonding processing process, characterized in that: The following steps are involved: Step 1: Select appropriate natural rubber or synthetic rubber according to the purpose and requirements of the product and prepare the compounding agent; Step 2: Mechanically or thermally plasticize the raw rubber, and evenly mix the plasticized raw rubber with various compounding agents in a rubber mixer to prepare a rubber mix; Step 3: According to the shape and size of the product, select the appropriate molding method, make the corresponding mold, put the mixed rubber into the mold, and shape it by heating and pressurizing; Step 4: Surface treatment is performed on the parts that need to be bonded, and appropriate bonding methods are selected according to the purpose and requirements of the product to perform bonding treatment; Step 5: Select the appropriate vulcanizing agent according to the type of rubber and product requirements, and place the molded rubber product into the vulcanizing tank for vulcanization; Step 6: Cool and trim the product, remove excess scraps and burrs, and conduct appearance inspection and performance testing; Step 7: Package the qualified rubber products and store them in a cool, dry place, avoiding direct sunlight and high temperature environment.

2. The rubber product manufacturing bonding processing process according to claim 1, characterized in that: The formula and proportion of raw materials are determined according to the performance requirements and production process of rubber products, and the raw materials are tested, accurately weighed, pretreated, mixed and stored to ensure the quality of raw materials, the selection and dosage of compounding agents, and environmental protection and safety.

3. The rubber product manufacturing bonding processing process according to claim 1, characterized in that: The plasticating methods mainly include mechanical plasticating and hot plasticating. Commonly used plasticating equipment includes open rubber mixers, closed rubber mixers and screw plasticators. Mixing is to mix the plasticized raw rubber with various compounding agents to make mixed rubber. The methods include open rubber mixer mixing and internal mixer mixing, and are strictly carried out in accordance with the mixing process conditions.

4. The rubber product manufacturing bonding processing process according to claim 1, characterized in that: In the manufacturing and bonding process of rubber products, a suitable molding method is selected according to the shape and size of the product, and a corresponding mold is made. The molding methods include compression molding, extrusion molding, injection molding, and calendering molding. The mold is first designed and drawn, and then the material is selected, processed and manufactured, and the quality is tested. After the mold is made, the rubber mix is ​​placed in the mold and formed by heating and pressurizing. The main steps are rubber mix preparation, mold preheating, rubber mix placement and mold closing, heating and pressurizing, and then opening the mold to take out the parts to complete the production.

5. The rubber product manufacturing bonding processing process according to claim 1, characterized in that: In the manufacturing and bonding processing of rubber products, the parts that need to be bonded are surface treated, and the treatment methods include grinding, sandblasting, solvent cleaning, chemical etching, and plasma oxidation. The bonding methods include cold bonding with glue, hot vulcanization bonding, hot melt adhesive method, and epoxy resin method.

6. The rubber product manufacturing bonding processing process according to claim 1, characterized in that: Vulcanization is the process of converting plastic rubber into elastic vulcanized rubber. Through vulcanization, cross-linking reactions occur between rubber molecular chains to form a three-dimensional network structure, thereby improving the physical and mechanical properties of rubber products, such as elasticity, hardness, tensile strength, wear resistance and aging resistance. It is divided into the influencing factors of vulcanization, the vulcanization process and the precautions for vulcanization.

7. The rubber product manufacturing bonding processing process according to claim 1, characterized in that: The main purpose of the finishing treatment is to remove excess scraps, burrs, and glue overflow defects generated during the processing of the product, so that the appearance of the product is neater and more beautiful, while improving the precision and dimensional stability of the product. The processing methods are divided into manual finishing and mechanical finishing, and the inspection is further divided into appearance inspection, dimensional measurement, and physical property testing. The inspection methods are divided into visual inspection method, measuring tool method, and physical property testing equipment method.

8. The rubber product manufacturing bonding processing process according to claim 1, characterized in that: In the manufacturing and bonding process, packaging and storage can ensure the final quality of the product and extend its service life, which includes the selection of packaging materials, packaging methods, storage environment selection, storage methods, regular inspection and maintenance, and attention to moisture and mildew prevention and avoidance of long-term pressure.

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