Tumbling-Media

Vibratory Finishing Machines For The Glossy Finish

Finishing machines are used for the finishing process that is carried out on parts for the purposes of cleaning, deburring, polishing and separation of parts. There are many types of finishing machines. The two important and widely used ones are the tumbling barrel machines and the vibratory finishing machines. In the tumbling variety, a huge barrel holds the parts and finishing media, compounds and water. In the vibratory finishing machines, there are usually tubs or bowls that undergo a shaking action at a particular speed. The shaking action is caused by a shaft that is attached to the tub or bowl.

The vibratory finishing machines come as large floor models (that can be fixed to the floor) or as smaller bench models (that are fixed on tables or benches). When the machine shakes at a high rate of speed, it causes the parts and the media to rub against each other thus resulting in cleaning and polishing. Using the vibrating machines, it is possible to get a very precise cutting of burrs and parts. They are also very effective in removing debris and dirt lodged in nooks and crannies, like a bore for instance. This sort of cleaning is not possible in a tumbling barrel. Vibratory finishing machines are ideally suited for use on delicate and intricate parts; also for large and bulky surfaces like wing spans - because they have high speeds combined with very short strokes. This provides powerful finishing but at the same time places very less stress on the parts. Vibratory finishing machines can be automated or semi automated quite easily and are good for continuous or batch processing.

Finishing or deburring media are materials that provide an abrasive action on parts to aid in the finishing process. They can be natural or man made. They come in different shapes and sizes depending on the requirements. When media is used in finishing machines, they accomplish finishing tasks like cleaning of oils, grease, dirt, grime etc and deburring of jagged edges or removing extra material from parts. Natural deburring media like walnut shells and corn cob media are made from naturally available material – they are non toxic, environment friendly, reusable and cost effective.

Man made deburring media like ceramic media and plastic deburring media are used for heavy and aggressive finishing. They come in different shapes and sizes. Some of the standard shapes found in the deburring media are cones, cylinders, pyramids, three headed stars, triangles etc. These shapes aid in polishing and cleaning hard to reach recesses in the parts. Depending on the shape and size of the holes in the parts, the shape of the media is chosen. If the part has a complex design with many corners having different shapes, then a combination of media shapes can be used to achieve uniform finish in the parts. Companies having a vast experience in the finishing industry generally have the expertise to find tailor made solutions to any deburring requirements. To gather further information, please log on to http://gravcollc.com/

Great Finish Made Possible With Ceramic Media and Centifugal Barrels

Ceramic media are materials used in the finishing process to aid in deburring, polishing, separating and cleaning of parts. They can be used for light as well as heavy deburring, fast deburring and rough metal removal. They are best suited for hard metals heavy cutting requirements. When small sized media are needed (around three fourth of an inch size), ceramic media has the best options. They can be used even for very heavy metal parts effectively. They are made out in different shapes like angle cut cylinders and triangles, cones, straight cut triangles, cylindrical wedges and angle cut tristars and ellipses.

Ceramic media are long lasting, cheap and can be put to multiple uses. They are manufactured in a variety of shapes that are precise and which prove very useful in preventing lodging problems and also in separating parts. They are made primarily with silica. Other materials in the manufacture of ceramic media include minerals and abrasives. Silica, minerals and abrasives are combined in different proportions and treated at a high temperature to produce a very hard product that is as strong as a cement product.

Ceramic media of varying density is used for different purposes. Where a rough finishing is needed (fast cutting and rough surfaces), higher density ceramic media is used. For smoother finishing, lesser density ceramic media is ideal. Higher the proportion of the abrasive material used in the manufacture of ceramic media, higher is the density. Higher the density, quicker is the wear and tear. There fore, higher density ceramic media should be considered only for special cases and when there is a need for cycle time reduction. To aid in special finishing requirements, the ceramic media can be tailored by changing the type and amount of abrasive grain used.

The fastest available option for mass finishing of parts is the centrifugal barrel machines. Their cycle times are 20 times faster compared to vibratory finishing machines. The centrifugal barrel machines have large barrels for loading parts, media and finishing compounds. They are high energy machines. In a typical centrifugal machine, there is a turret at the centre. A set of barrels are placed around the turret. When the turret starts rotating in one direction, they set the barrels rotating in the other direction. Thus a high energy sliding action is produced inside the barrels, imparting a uniform finish to the parts. Barrels are normally made of steel; sometimes they are made from composite materials too. They have polyurethane lining and can be removed during the loading and unloading process. Steel barrels are meant for cycle times exceeding one hour; for cycle times less than an hour, composite barrels are ideal.

Centrifugal barrel machines come with process timers that can be set for specific finishing jobs. There is an emergency stop switch that can be used in crisis scenario. Indicator lights and safety locks are generally provided to ensure control and safety. Wiring can be done for different electrical voltage settings. To explore options in centrifugal barrel machines and ceramic media, visit http://gravcollc.com/

Tumbling Media And Compounds For That Great Finish

‘Media’ is the terminology used to define a material that is used to modify or alter the appearance of a part. It generally refers to an abrasive, but it could refer to any material that can abrade, clean, polish or separate parts. Tumbling media is used in general purpose metal polishing, deburring – both light and heavy, fast and extra fast and aggressive metal removal, fast, heavy cutting, jewellery polishing, burnishing etc. There are many types of tumbling media like ceramic performed shapes, plastic performed shapes, synthetic performed shapes, precision ceramic preformed shapes, carbon steel, stainless steel, hardwood, aluminium oxide, corn cob, silicon carbide grit and walnut shells are some of them.

A finishing media company has to give high quality products at reasonable prices to their clients. A fully equipped laboratory stocked with finishing machines where new processes are developed to meet even the toughest application will make them effective innovators. Plastic media is normally used for pre painted or pre plated finishes, polishing and in cutting fast and heavy duty. Plastic media are ideal for soft metals like brass and aluminium and stringy materials. It is useful for providing a smooth but dull finish. These media are long lasting and are built to cut fast and provide a fine finish. With a vast experience, a company can provide customized solutions to their clients. Ceramic tumbling media come in different shapes, sizes and composition. Ceramic media are used for fast deburring and tough metal removal. It is mainly used in cutting hard metals. When media of smaller dimensions are needed, ceramic media offers the best options. It is better than plastic media in supporting very heavy metal parts.

Dry finishing media of smaller dimensions are used to polish and finish smaller surfaces like jewellery. For this, cob and walnut shells that are treated are used and a finishing paste is also typically used for this. Very delicate surfaces of any size can also be finished using corn cob media. Corn cob is bio degradable and it is a tumbling grit. It can be applied as tumbling and vibratory media and can dry parts by absorbing oil and dirt, without scratching the parts’ surfaces. These products can be used to finish even very small and delicate surfaces effectively. Their product formulas can achieve 1 Ra finish and are made to handle even finishes of a delicate nature for decorative requirements.

There is a wide range of tumbling compounds to satisfy different client needs. Dry compounds, liquid compounds, burnishing compounds, cleaning compounds and deburring compounds are some of the available finishing tumbling compounds. There are compounds for standard deburring applications, burnishing of steel, part on part and applications in washing different parts. Walnut shells are treated and prepared by grinding them into different grit sizes. They are used in cleaning as well as polishing of surfaces. It is recommended as tumble media for polishing metals like aluminium, brass and bronze. They are soft abrasives but highly durable and angular. To learn more, go to http://gravcollc.com/

Using Walnut Shells For A Bright Finish

Finishing media is a term used to describe material or materials that alters the appearance of a part by cutting off rough edges or deburring them. Finishing media is also used in cleaning, burnishing and polishing of parts and their surfaces. Further, they are used in anti rusting and coloring also. There are many types of finishing media like plastic finishing media, ceramic finishing media, Dry finishing media and wet and dry finishing compounds. There are machines like vibratory system, tumblers and spinning systems in which the finishing is carried out – by putting the finishing media and the parts together. The media rubs against the parts, effectively deburring them. The degree of finish can be manipulated by increasing or decreasing the speed of these machines. It can also be controlled by the type, size and shape of the media being used.

Walnut shells come under the category of dry finishing media; they are nothing but treated walnut shells. The shells are grounded to grit of varying dimensions to suit different needs (depending on the nature and weight of the part being finished). The walnut shell media can be used in cleaning and finishing applications. They are ideal for tumble finishing of metals like brass, bronze and aluminium. Walnut shell grit finds use in oil well drilling, to keep the circulation going. It is also mixed with abrasive paints used typically around swimming pools, in walkways etc where they act as anti skid agents.

Walnut shell media is made by crushing the walnut – it is hard and fibrous in nature. They are long lasting, angular and have many faces. They are mildly abrasive. The main advantage of walnut shell media is bio degradability. It is there fore environment friendly and non toxic. It can be reused many times over. It suits both tumbling and vibratory systems and reduces finishing operations time substantially. Because it is only mildly abrasive, it retains micro finishes; while removing the top layer of paints, it protects the base coating of paints.

Deburring can be defined as a finishing method typically used in manufacturing and industrial units. Metals are made into parts of different shapes and sizes by welding, molding or casting etc. The resulting pieces have jagged edges called burrs. The process of removing the burrs is called deburring. It is essential to make high quality parts that are smooth and functional while being aesthetically appealing too. Abrasive materials are normally used as deburring media. The process of deburring is applied in the wood industry, for wood pieces too. Deburring media varies in composition, shape and size depending on the part being deburred. Ceramic deburring media is used for heavy metals, synthetic or plastic media is most suited for less aggressive needs, precision media that come as small pins and spheres are used on surfaces and parts that need precise and delicate handling, natural media like corn cob and walnut shells for non abrasive deburring and finishing compounds for deburring with a good polishing effect. For further details, log on to http://gravcollc.com/