Polyester abrasives are manufactured with a special polyester resin and have characteristics specifically designed to increase the performance of the vibration process and reduce the quantities used. The heat treatment applied in the production process guarantees a perfect polymerization of the resin, acquiring an ideal cutting quality and consumption.
The use of particular abrasive powders such as silicon carbide, alumina and others, perfectly mixed with the resin, allows to reduce the working cycle, decreasing the quantity of solid parts in suspension and reducing almost totally the production of foam in the discharge water, which allows to recirculate the water and reduce the volume of contaminated water.
Polyester abrasives can be used for polishing, buffing and pre-galvanizing finishing of all types of materials. They can also be used in any vibrating machine, or in rotating drums.
There are a large number of sizes and geometric shapes: abrasive cones, pyramids, elliptic, lenticular, or tristar, which allows to meet any customer and process requirement. We also have a wide variety of colors to differentiate the different abrasiveness.
The great diversity of geometric shapes has been studied in order to be able to treat all types of parts and thus to be able to touch all parts of the part that we are interested in processing during the vibration process. At the same time, it is interesting to verify the dimensions of the abrasive to avoid that it gets stuck in the piece and thus not increase the operation time by having to remove it, a process that is sometimes very laborious. Depending on the amount of abrasive mixed with the resin, the cut changes, so we can go from mixtures with 100% resin with practically zero consumption, to mixtures with a large amount of abrasive for high roughing processes.
Once the vibration process is finished we have to separate the abrasives from the treated parts. Screens are used for this purpose, either in the form of holes or rods, depending on the dimensions of the chip and the parts. There is also the possibility of manufacturing the magnetic abrasive and thus being able to separate it from the parts with an extractor for this purpose.
ABRASIVES FOR DRY VIBRATION
As a result of 6 years investing resources in R+D+i, CONIEX, S.A. and its collaborators have developed the ECOS product line, innovative abrasives for DRY vibratory polishing.
ECOS abrasives allow perfectly polished surfaces to be obtained without the use of water or any other liquid, thus reducing environmental impact and operating costs.
ECOS abrasives are available in different shapes such as conical, parabolic, drop, cylindrical, etc., as well as in various sizes ranging from 12 to 60 mm.
There are also different types of grades depending on the required applications such as deburring, polishing and, in general, finishing of all types.
The elastic properties of the resin present in ECOS abrasives offer the following advantages:
- Finishes with improved roughness
- Increased productivity of the vibro, since it allows to increase the number of parts treated in each cycle.
- Increased cutting efficiency and, as a result, shorter working cycles
CERAMIC AND PLASTIC ABRASIVES
In vibratory polishing, plastic and ceramic abrasives are used which, inside a vibrating tank, acquire a free movement that gives them the necessary energy to impact against the parts to be polished and, through friction, remove the excess material from the surface of the parts.
Traditionally, the process requires the presence of water and, in most cases, chemical compounds are also necessary, which, formulated differently, can facilitate the work, obtaining the following advantages:
- They lubricate the contact between the abrasives and the parts to be treated.
- Uniform movement inside the vibrating vessel
- Keep the working mixture clean
- Preventing the formation of mud during treatment
- Avoid repositioning of metal parts on the surface of the parts to be treated
- Increases the aggressiveness of abrasives
- Facilitate the achievement of shiny surfaces
These are ureic resin-bonded abrasives, whose most frequent applications are the measured deburring of zamak alloys, brass, nickel silver, stainless steel, etc.
Properties and advantages of urea abrasives:
- Low density, which guarantees that the abrasive does not bite the pieces.
- Easier and less costly treatment.
- Wear: ± 12-13% in 24 working hours
- Presented in geometric shapes: cone, pyramid and ellipse.
Coniex supplies wood sawdust on pallets and in bags for the surface finishing sector.
Corn sawdust is a natural abrasive from the grinding and sifting of the corn cob.
The corn cob is made up of three parts: the heart and the periphery, where the kernels are found, make up the light part. A woody girdle interspersed between the heart and the periphery forms the hard part.
The granules obtained from the woody waist are characterized by an absence of dust, a high density and fluidity. In addition, it has a hardness identical to iron and a good absorption capacity.
On the other hand, those obtained from the heart and periphery are soft, of low density and have a very high absorption capacity, up to five times their weight in water.
These compounds are widely used in surface treatment, especially for the drying of parts. They are normally used in vibrating machines with internal resistances to heat the sawdust, since this increases in size when it absorbs the humidity of the pieces and can become embedded in some part of the pieces to be dried. For this reason, the heat from the resistors that heat the compound is used to make the water evaporate and the sawdust grain returns to its initial state.
Wood sawdust is also used for polishing metal or plastic parts by means of pastes that are impregnated in the grains, which produce this polishing effect when in contact with the parts. Currently this process is not widely used, since many hours are necessary to achieve a good finish.
The hard part obtained from crushing can also be used for pickling. For this purpose, the grain has to be projected onto the surface to be pickled with a certain speed and pressure.
Due to its large consumption in the world of surface treatment, there are different granulometries that are determined by numbers. The smaller the number, the smaller the grain, with the most commonly used numbers being 2-3-4-5.