Custom Molded Rubber Gaskets | Custom Molded Rubber Seals
What is rubber molding used for?Rubber molding is a process used to produce intricate and detailed parts in a wide variety of shapes, sizes, and materials. From rubber gaskets and seals to complex housings and gears, there are many applications for rubber-molded products.
Understand the Different Types of Rubber Molding Products Available
Rubber molding is divided into three distinct methods, each with its own set of advantages and limitations. Compression molding is the most common type of rubber molding and is used to produce medium-to-high volume parts with a consistent quality level. Injection molding is excellent for producing complex shapes, as the high pressure forces the rubber compound into very intricate designs. Finally, transfer molding combines features of both compression and injection molding to make more complex parts than before.
What are molded rubber products?
Rubber molded products refer to products obtained by molding rubber in its mold cavity and vulcanizing it. Rubber molded products are the most widely used special products in rubber products. Its characteristics are: easy to manufacture, accurate shape, smooth surface, easy to mechanize, and automated production. High production efficiency, suitable for rubber products with complex shapes.
Choose Your Materials Carefully and Decide Which Method Is Right for You When selecting a rubber molding method, consider the type and grade of rubber you will be using. Different materials are suitable for different applications, so you'll have to determine which material will meet or exceed your requirements. Additionally, each method produces parts with different stiffness and hardness characteristics, so it’s important to understand how each property contributes to the finished product before committing to a specific process. The right material and molding method can mean the difference between success and failure.
The success of any part is often determined by the materials and formulations used to make it. When it comes to rubber, there are dozens of materials to choose from. Which material is the best choice for your product, part or assembly? Let
Zhongxiang Rubber answer this question!
Guangdong Zhongxiang produces a wide variety of customized rubber products, has decades of development experience, and has a formula library that has its own certification laboratory and engineering team and can customize rubber ingredient formulas to meet your physical requirements.
The following information can give you a broad understanding of the properties of different rubbers and help you choose the right rubber material.
Butyl rubber
Butyl Rubber (IIR) is a synthetic rubber known for its excellent air impermeability and excellent resistance to oxidation and ozone. It is generally resistant to animal and vegetable fats, oils, greases, ozone, and strong oxidizing chemicals. It is usually attacked by petroleum solvents, coal tar solvents, and aromatics. It is the primary choice for automotive inner tubes and tire liners. Other applications include conveyor belts, steam hoses, O-rings, and shock and vibration products.
EPDM RubberEPDM (Ethylene Propylene Diene Monomer) is a copolymer of ethylene, propylene, and a small amount of non-conjugated diene. It is a kind of ethylene-propylene rubber. Composition only contains unsaturated double bonds in the side chain, so it has excellent aging resistance such as ozone resistance, heat resistance, and weather resistance, and can be widely used in automotive parts, waterproof materials for construction, wire and cable sheaths, heat-resistant hoses, tapes, Automotive seals and other fields.
Nitrile Rubber
Nitrile rubber (NBR) is a copolymer made of acrylonitrile and butadiene monomers. It is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high wear resistance, good heat resistance, and good viscosity. The relay is strong. Its disadvantages are poor low-temperature resistance, poor ozone resistance, poor insulation performance, and slightly lower elasticity.
Nitrile rubber is mainly used in the manufacture of oil-resistant rubber products.
Fluorocarbon Rubber
Fluorocarbon Rubber, FKM, is a very high-cost synthetic rubber used when greater resistance to heat, chemicals, oils, and solvents is needed. It is generally resistant to all aliphatic, aromatic, and halogenated hydrocarbons, acids, and animal and vegetable oils. It is generally attacked by ketones, low molecular weight esters, and nitro-containing compounds. It is used in o-rings, seals, gaskets, diaphragms, pump impellers, tubing, and high-vacuum and radiation equipment.
Natural Rubber
Natural Rubber, NR, is found in the juices of many plants but the principal source is the Hevea Brasiliensis, a tropical tree. This is the product that all synthetic rubber types have tried to duplicate. It is generally resistant to most moderate chemicals wet or dry, alcohols, and aldehydes. It is generally attacked by ozone, strong acids, fats, oils, greases, and hydrocarbons. Typical applications are in tires, shock mounts, energy absorbers, seals, isolators, couplings, bearings, springs, and other dynamic applications.
Neoprene Rubber
Neoprene Rubber, CR, also known as polychloroprene is another synthetic rubber known for its resistance to oils, oxidation, ozone, and flame. It is generally resistant to moderate chemicals and acids, ozone, oils, fats, greases, and solvents. It is generally attacked by strong oxidizing acids, esters, keystones, chlorinated aromatic, and nitro hydrocarbons. General applications include hose, belting, wire and cable, footwear, tires, bearing pads, and impellers.
