Categories Starting with 'R'

Custom rubber molding is a molding methodology that produces molded rubber products customized to user specifications. The process uses uncured rubber or elastomers as raw materials to produce the molded rubber products. The molding method is a fast and reliable method for producing multiple rubber parts out of a single pattern. The liquid rubber material which is to be transformed into a specific shape is poured into a mold, followed by curing in an oven and subsequent cooling thereby giving rise to the finished product. Rubber grommets, stoppers, tubes, and shock mounts, etc., are some examples of products produced by this method of rubber molding.

Rubber extrusions refer to extruded rubber products obtained as end products of rubber extrusion process; the rubber material is rendered its final shape through this process. Production of extrusions with multiple rubber types in the same profile is possible, and such production is undertaken to establish a differentiation in the characteristics of individual parts of the profile. Extrusions of this type can be manufactured through vented extrusion, pin barrel extrusion, co-extrusion, hot-feed extrusion and cold-feed extrusion. These extrusions are commonly used in a variety of industries such as electronics, aerospace, construction, medical, lighting appliances and automotive.

A relief valve is a valve designed to provide protection from over-pressure in steam, gas, air and liquid lines. The valve "lets off steam" when safe pressures are exceeded, then closes again when pressure drops to a preset level.

Rubber injection molding is a molding methodology where cool rubber is inserted at high pressure into a closed mold by means of a hydraulic ram. Within the mold, the parts are subjected to curing at a high temperature so as to create a chemical reaction that induces full material properties in the product. Molding of this type is ideal for the production of homogenous rubber products. Silicone, nitrile, neoprene, ethylene propylene, viton and fluorosilicone, as well as medical rubber parts, viton seals, viton gaskets are some examples of products manufactured with this molding methodology.

Rubber O-rings are mechanical seals that are manufactured from natural rubber, an elastomer that is derived from latex. O-rings made from rubber are generally not resistant to sunlight and ozone, but compatible with vegetable oils, animal oils, and most oxidizing chemicals. These O-rings are also compatible with ketones and alcohol. However, with the advent of superior synthetic elastomers that feature improved resistance to temperatures as well as chemicals, natural rubber O rings are increasingly being replaced by synthetic elastomer O-rings made from materials such as Buna-N and silicone rubber.

Roll forming services are continuous forming operations carried out on long strips of metal by passing them through successive sets of rollers. Each roller forms the strip incrementally until the desired shape is achieved. By using a series of custom designed rollers or roll tools, many diverse, cross sectional profiles can be attained on the metal strips. These services can be performed on a range of metals, but are typically used with coiled steel.

Rubber gaskets are a sealing medium used for forming tight seals between two components. The compressibility property of these gaskets allows for their exact fitting into the required gap thereby ensuring a rigid and secure seal that prevents leaks. Usually rubber sheet materials are cut to produce these gaskets; however several synthetic rubbers such as PVC (polyvinyl chloride), TPRs (thermoplastic rubbers), neoprene, Nitrile (NBR) and Viton are also used for their fabrication apart from rubber. Gaskets of this type are used in transportation industries, heavy equipment, construction, HVAC applications and appliances.

Rubber bonded to metal is the end product of rubber to metal bonding process, which involves adhering rubber to a metal substrate. The metal imparts sufficient stiffness to the rubber so that the part can be mounted, the rubber on the other hand equips the metal with elasticity and damping properties. Prior the occurrence of molding, the metal is degreased and sandblasted to eliminate rust and other impurities existing on its surface. The metal is then sprayed at with a bonding agent. The rubber once dried is placed into the mold to undergo forming and curing. Rubbers of this type are prevalent in various industrial, medical and commercial domains.

Rubber compression molding is a variant of molding process where an uncured rubber preform is inserted into the mold cavity directly before closing the mold. Weight of the uncured rubber preform is maintained high in comparison to the final product to avoid voids or air traps in the end product. The rubber is squeezed between the plates at the top and bottom; the number of plates can be varied to two, three or more depending upon the part complexity and configuration. The rubber is subsequently subjected to vulcanization by both heat and pressure energies. This type of molding is generally used on less bulky parts followed by deflashing of these parts in a secondary operation under cryogenic conditions.

A rotary damper, also known as a rotary dashpot, is a mechanical device that uses viscous friction to resist motion. The resisting force is equivalent to the velocity acting in the opposite direction, resulting in decelerated motion and absorbing energy. Rotary dampers are commonly applied with springs that are used to resist displacement. Some of the common applications of rotary dampers include mechanical delays, shock absorption, speed control, and slipping drives.

A radial fan or centrifugal fan is a mechanical device used to transport air or gases in a variety of ventilation and air-pollution control systems, using centrifugal force. These fans consist of a rigid, welded scroll-shaped housing, which contains a fan wheel impeller with an inlet, located on the side of the fan, and an outlet located in line with the fan blade exit ports. The fan blades are mounted around the fan wheel's hub, which is run by a drive shaft that passes through the housing. The air or gas to be circulated enters the fan through the inlet and the fan blades drive the air at right angles to the inlet. In addition, the air is also accelerated by the radial force imparted by the fan blades. This accelerated air is then blown out of the outlet, along with an increase in pressure. In some radial fans, the inward or outward flow of gas is controlled by the use of fan dampers or vanes on either the inlet or outlet.

Roller conveyors consist of a series of rollers supported in a frame over which objects are advanced manually, by gravity or by power.

A rubber bellows is an expansion joint commonly used with pipes made from the elastomer rubber. These rubber bellows consist of a series of convolutions, designed to accept a variety of deflections, including lateral, angular, and axial movements. To suit pipes, these bellows are designed to withstand internal pressures. Rubber bellows are commonly used with pipes that maybe subjected to vibration and motion. Besides pipes, these bellows are also used in applications that require anti-vibration and noise reduction.

A rotary feeder, also referred to as an air lock machine or a rotary pocket feeder, is a device that propels objects or materials along in a process. A typical device is a rotor with various blades encased in a cylinder. The parts are picked up and translocated at the destination by a rotating plate. These feeders constitute one of the most popular devices widely used for the regulation of flow of granular and powdered solid materials from repositories such as silos, bins, hoppers and bunkers.

A rotary airlock valve contains a set of rotating pockets that mechanically pass solids while preventing excessive return flow of gases and is used on fuel systems to prevent burn-back or for metering.

An O ring drive belt is a long, elastomeric belt with circular cross sections, used in various power transmission applications. These belts are generally made from synthetic elastomers that are highly flexible and elastic, such as urethane. This type of drive belt is generally used in power transmission applications that require low torque, including drills and mini-conveyors. Besides standard belt sizes, O-Ring drive belts are also available as long straight pieces, which can be cut and spliced to the length required for the application.