Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 170

The rubber processing process includes basic steps such as plasticization, mixing, calendering or extrusion, molding, and vulcanization. Each of these steps has specific requirements for the final product, and various auxiliary operations are employed to support them. In order to add various required compounding agents to rubber, the raw rubber must first be processed in a refiner to improve its plasticity ； Then, carbon black and various rubber additives are uniformly mixed with the rubber through mixing to form a rubber compound ； The rubber compound is extruded to form a blank of a specific shape ； It is then combined with the textile material that has been calendered and coated with adhesive (or with metal material) to form a semi-finished product ； Finally, vulcanization is used to transform the plastic semi-finished product into a highly elastic final product. 　 For products that require high precision, as well as rubber products such as oil seals, O-rings, and seals, edge trimming and deburring are also necessary. The available methods for this purpose include manual trimming, mechanical trimming, and cryogenic trimming. Manual trimming: high labor intensity, low efficiency, and low quality rate. Mechanical trimming: It mainly includes punching, grinding with a grinding wheel, and trimming with a circular tool, and is suitable for specific products where high precision is not required. Freeze trimming: Specialized freeze-trimming equipment that uses liquid nitrogen (LN2) to render the rough edges of the finished product brittle at low temperatures; specific frozen particles (projectiles) are then used to strike these rough edges in order to remove them quickly. Freezing trimming is efficient, low-cost, and suitable for a wide range of products, having become the mainstream standard process.

The rubber processing steps mainly include: compounding, mixing, calendering or extrusion, molding, and vulcanization. Its uses are for sealing materials, providing vibration resistance, sound insulation, and heat insulation. Rubber is widely used in the automotive industry, aerospace, oil extraction, the chemical industry, light textiles, agriculture and forestry, water management, healthcare, commodity storage, culture, education, and sports, as well as in household items, wires and cables, and building materials. Precautions: 1. It is temperature-dependent. Polymer materials are generally affected by temperature: rubber becomes rigid and brittle in low temperatures, while at high temperatures it softens, melts, undergoes thermal oxidation, thermal decomposition, and even combustion. 2. It exhibits aging phenomena. Just as metals corrode, wood decays, and rocks weather, rubber also ages due to changes in environmental conditions, which leads to a decline in its performance and a reduction in its service life.

The rubber processing process includes basic steps such as plasticization, mixing, calendering or extrusion, molding, and vulcanization. Each of these steps has specific requirements for the final product, and various auxiliary operations are employed to support them. In order to add various required compounding agents to rubber, the raw rubber must first be processed in a refiner to improve its plasticity ； Then, carbon black and various rubber additives are uniformly mixed with the rubber through mixing to form a rubber compound ； The rubber compound is extruded to form a blank of a specific shape ； It is then combined with the textile material that has been calendered and coated with adhesive (or with metal material) to form a semi-finished product ； Finally, vulcanization is used to transform the plastic semi-finished product into a highly elastic final product.

The rubber processing process includes basic steps such as plasticization, mixing, calendering or extrusion, molding, and vulcanization. Each of these steps has specific requirements for the final product, and various auxiliary operations are employed to support them. In order to add various required compounding agents to rubber, the raw rubber must first be processed in a refiner to improve its plasticity ； Then, carbon black and various rubber additives are uniformly mixed with the rubber through mixing to form a rubber compound ； The rubber compound is extruded to form a blank of a specific shape ； It is then combined with the textile material that has been calendered and coated with adhesive (or with metal material) to form a semi-finished product ； Finally, vulcanization is used to transform the plastic semi-finished product into a highly elastic final product. 　 For products that require high precision, as well as rubber products such as oil seals, O-rings, and seals, edge trimming and deburring are also necessary. The available methods for this purpose include manual trimming, mechanical trimming, and cryogenic trimming. Manual trimming: high labor intensity, low efficiency, and low quality rate. Mechanical trimming: It mainly includes punching, grinding with a grinding wheel, and trimming with a circular tool, and is suitable for specific products where high precision is not required. Freeze trimming: Specialized freeze-trimming equipment that uses liquid nitrogen (LN2) to render the rough edges of the finished product brittle at low temperatures; specific frozen particles (projectiles) are then used to strike these rough edges in order to remove them quickly. Freezing trimming is efficient, low-cost, and suitable for a wide range of products, having become the mainstream standard process.

The rubber processing steps mainly include 1. kneading, 2. mixing, 3. calendering, 4. extrusion, 5. molding, and 6. vulcanization. The processing of rubber is essentially a process of resolving the contradiction between plasticity and elasticity; through various processing methods, elastic rubber is transformed into kneaded rubber with plasticity. By adding various additives, semi-finished products are created, and then through vulcanization, these semi-finished products are turned into rubber products with high elasticity and excellent physical and mechanical properties. 1. Method of making rubber: Latex is extracted from plants such as rubber trees and rubber grass, and after processing it is turned into a material that is elastic, insulating, and impermeable to water and air. Highly elastic polymer compounds. It is divided into natural rubber and synthetic rubber. Natural rubber is produced by extracting the gum from plants such as rubber trees and rubber grass, and then processing it ； Synthetic rubber is obtained through polymerization reactions of various monomers. Rubber products are widely used in various aspects of industry and daily life. 2. Processing process: This process includes basic steps such as plasticizing, mixing, calendering or extrusion, molding, and vulcanization. Each step has specific requirements for the final product, and various auxiliary operations are carried out to support these steps. In order to add various necessary additives to rubber, the raw rubber must first be vulcanized to improve its plasticity ； Then, carbon black and various rubber additives are uniformly mixed with the rubber through mixing to form a rubber compound ； The rubber compound is extruded to form a blank of a specific shape ； It is then combined with the textile material that has been calendered and coated with adhesive (or with metal material) to form a semi-finished product ； Finally, vulcanization is used to transform the plastic semi-finished product into a highly elastic final product. 3. For products that require high precision, as well as rubber products such as oil seals, O-rings, and seals, edge trimming and deburring are also necessary. The available methods for this purpose include manual trimming, mechanical trimming, and cryogenic trimming. Manual trimming: high labor intensity, low efficiency, and low quality rate. Mechanical trimming: It mainly includes punching, grinding with a grinding wheel, and trimming with a circular tool, and is suitable for specific products where high precision is not required. Freeze trimming: Specialized freeze-trimming equipment that uses liquid nitrogen (LN2) to render the rough edges of the finished product brittle at low temperatures; specific frozen particles (projectiles) are then used to strike these rough edges in order to remove them quickly. Freezing trimming is efficient, low-cost, and suitable for a wide range of products, having become the mainstream standard process

The rubber processing process includes basic operations such as plasticizing, mixing, calendering or extrusion, molding, and vulcanization. Its purposes are to provide sealing, vibration prevention, sound insulation, and heat insulation for materials. Rubber is widely used in the automotive industry, aerospace, oil extraction, the chemical industry, light textiles, agriculture and forestry, water management, healthcare, commodity storage, culture, education, and sports, as well as in household items, wires and cables, and building materials. Precautions: 1. It is temperature-dependent. Polymer materials are generally affected by temperature: rubber becomes rigid and brittle in low temperatures, while at high temperatures it softens, melts, undergoes thermal oxidation, thermal decomposition, and even combustion. 2. It exhibits aging phenomena. Just as metals corrode, wood decays, and rocks weather, rubber also ages due to changes in environmental conditions, which leads to a decline in its performance and a reduction in its service life.

I. An overview of the basic production processes for rubber products: Processes: 1. Vulcanization 2. Mixing 3. Calendering 4. Extrusion 5. Molding 6. Curing. II. Specifically, the processing of rubber involves addressing the contradiction between plasticity and elasticity; through various processing methods, elastic rubber is transformed into vulcanized rubber with plasticity. By adding various additives, semi-finished products are created, and then through curing, these semi-finished products are turned into rubber products with high elasticity and excellent physical and mechanical properties. 1. Method of making rubber: Latex is extracted from plants such as rubber trees and rubber grass, and after processing it is turned into a material that is elastic, insulating, and impermeable to water and air. Highly elastic polymer compounds. It is divided into natural rubber and synthetic rubber. Natural rubber is produced by extracting the gum from plants such as rubber trees and rubber grass, and then processing it ； Synthetic rubber is obtained through polymerization reactions of various monomers. Rubber products are widely used in various aspects of industry and daily life. 2. Processing process: This process includes basic steps such as plasticizing, mixing, calendering or extrusion, molding, and vulcanization. Each step has specific requirements for the final product, and various auxiliary operations are carried out to support these steps. In order to add various necessary additives to rubber, the raw rubber must first be vulcanized to improve its plasticity ； Then, carbon black and various rubber additives are uniformly mixed with the rubber through mixing to form a rubber compound ； The rubber compound is extruded to form a blank of a specific shape ； It is then combined with the textile material that has been calendered and coated with adhesive (or with metal material) to form a semi-finished product ； Finally, vulcanization is used to transform the plastic semi-finished product into a highly elastic final product.

What are the main steps in the rubber processing process? What are its uses and precautions? Answer: The basic processes include key steps such as plasticizing, mixing, calendering or extrusion, molding, and vulcanization. Each of these steps has specific requirements for the final product, and various auxiliary operations are employed to support them. In order to add various necessary additives to rubber, the raw rubber must first be vulcanized to improve its plasticity ； Then, carbon black and various rubber additives are uniformly mixed with the rubber through mixing to form a rubber compound ； The rubber compound is extruded to form a blank of a specific shape ； It is then combined with the textile material that has been calendered and coated with adhesive (or with metal material) to form a semi-finished product ； Finally, vulcanization is used to transform the plastic semi-finished product into a highly elastic final product.

The rubber processing process includes basic operations such as kneading, mixing, calendering or extrusion, molding, and vulcanization

Rubber processing involves basic processes such as plasticizing, mixing, calendering or extrusion, molding, and vulcanization. Its uses include providing sealing, vibration prevention, sound insulation, and heat insulation for materials. Rubber is widely used in the automotive industry, aerospace, oil extraction, the chemical industry, light textiles, agriculture and forestry, water management, healthcare, commodity storage, culture, education, and sports, as well as in household items, wires and cables, and building materials. Precautions: 1. It is temperature-dependent. Polymer materials are generally affected by temperature: rubber becomes rigid and brittle in low temperatures, while at high temperatures it softens, melts, undergoes thermal oxidation, thermal decomposition, and even combustion. 2. It exhibits aging phenomena. Just as metals corrode, wood decays, and rocks weather, rubber also ages due to changes in environmental conditions, which leads to a decline in its performance and a reduction in its service life.