PHẦN DIỄN ĐÀN CAO SU, CÁC BẠN CÓ THỂ GỞI BÀI. BLOG CAO SU VIỆT ĐĂNG GIÚP.
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Tôi tìm thấy một đồng nghiệp có trang web hay, đăng để các bạn đọc để cảm nhận.
About Rubber Rollers and Rubber Roller Manufacturers Including: Conveyor Rollers, Drive Rollers, Grooved Rollers, Guide Rollers, Industrial Rollers, Ink Rollers, Laminating Rollers, Polyurethane Rollers, Rollers, Rubber Rolls, Silicone Rollers & Urethane Rollers.
Rollers have many uses. Ink rollers, laminating rollers and other similar rollers are used for the application of one material onto another material. Other roller varieties can be used to facilitate movement of various machine parts, as is the case with drive rollers. Another very common use of rollers is as tools that provide support and transportation to materials moving through process equipment. Examples of such rollers include conveyor rollers, grooved rollers and guide rollers. Fabricated using a wide variety of elastomeric materials, rubber rollers can be composed of silicone, EPDM, nitrile, polyurethane (also sometimes referred to as urethane), neoprene and more. Rubber rollers are often manufactured with metal cores. Typical roller core materials include aluminum, steel and stainless steel. Industrial rollers often feature metal cores and are used for heavy-duty applications such as metal processing, heat treating, packaging and bulk material handling. Rubber rollers are also used in circuit board printing, laser printing, photographic imaging, medical chart recording, newspaper printing, commercial printing and paper converting. Other rubber roller applications include coating, drying, annealing, calendaring and embossing.
Because there are so many contexts in which rollers are applied, roller manufacturers make an equally wide variety of roller configurations available to customers. Some of the more common roller varieties include conveyor rollers, drive rollers, guide rollers, ink rollers and grooved rollers. Conveyor rollers can be made from a variety of rubber materials and are among the most common roller varieties. Drive rollers are unique in that they have integral shafts that feature a keyway intended for sprockets or gears used to run the roller. This type of rubber roller is often used for machinery such as web machines and converters. Guide rollers, also known as idler rollers, are used to provide support, typically to roller conveyor systems. However, guide rolls do not have the ability to convey power or to make directional changes like drive rollers. Ink rollers, or printing rollers, may either contain ink within the roller itself or simply be engraved with a pattern. Ink rollers can be utilized in machinery sized anywhere from small office equipment or large printing presses. Grooved rollers are often grooved in a V, U or spiral pattern. Grooved rollers are commonly used in applications such as belt driven conveyor systems and laminating machinery.
The more obscure rubber roller types are, for the most part, used only for specified applications. For instance, laminating rollers are a type of heated roller designed for an application that requires heat in order to occur. As a result, laminating rollers are fabricated from such heat-resistant materials as silicone, which can perform well at temperatures as high as 500º F (260° C). Other types of less common rubber rollers include cleaning rollers, live shaft rollers, dead shaft rollers, stinger rollers and spreader rollers. Highly specialized, cleaning rollers can be used to clean a variety of surfaces through the removal of dust and other contaminating particulates. Well-suited for high load quantities and rough environments, live shaft rollers contain external bearings in which both the roller shaft and the roller itself rotates. Dead shaft rollers, on the other hand, have internal bearings at the location of the spinning roller that rotates around a stationary shaft. Used in applications such as offshore pipe-lay vessels, stinger rollers are very similar to dead shaft rollers except that stinger rollers are designed to function specifically in marine applications. Used in many spreading applications, spreader rollers are commonly used in webs spreading machinery in order to prevent web wrinkling and to fix wrinkles by stretching and spreading the web. Spreader rollers are often machined with grooves in designs such as herringbone, spiral, lateral-fluted or circumferential.
Rubber rollers are typically manufactured through molding or casting processes, but they may also be formed through extrusion processes. For solid rubber rollers, molding processes such as injection or compression molding are most likely used. In injection molding, the elastomeric material is heated and then injected into the cavity of a split die chamber or mold, which is then clamped shut and eventually cooled to form the part. For compression molding, the rubber material is placed in a mold under heat, and pressure is applied in order to achieve the desired shape. For extrusion, rubber rollers can be formed through heating elastomeric materials and then squeezing the molten material through a die that has a pin attached to the center, which creates the hollow part of the tube. For rubber rollers with metallic cores, the cores are typically formed through a metal machining process such as stamping. In order to form a rubber coating over the metal core, a rubber-to-metal bonding process is used. In rubber-to-metal bonding, rubber is adhered to a metal substrate through the use of a bonding agent, which typically consists of polymer-solvent solutions, a primer coat based on phenolic-style resins and a top layer that is a mix of polymers and other materials. When carefully and correctly paired with their applications, rollers can be very important assets.
Trích : http://www.iqsdirectory.com/rubber-rollers/
