RKM Deburring Plastic Media

RKM plastic media is preformed plastics, the other workhorse media, are also available in a variety of grades or bodies, with some manufacturers having nine grades while others have as few as three.

This media is formed by bonding abrasives (generally 40-70% by weight) into polyester, usually by casting. After casting, this media is typically pre-tumbled to remove flash. The plastic media is softer, has a lower density than preformed ceramic media, provides a cushioning effect, and sometimes has a shorter life. It is well suitable for finishing softer metals and fragile parts, achieving pre-plating requirements, and producing smooth finishes as low as 5 micrometers. During finishing the matrix which is softer than the abrasive, is eroded, leaving the abrasive to perform the desired work, While some users believe it assures parts free of impingement, this is not ture, All the mass finishing processes expert for fixtured or compartmentalized operations allow part-on-part contact. Plastic media can also be produced in a wide variety of desirable shapes. In practice over a decade some shapes go out of favor and new ones emerge.

plastic media vibratory finishing

Inovatec noted that the plastic media provides no surface hardening of the workpieces. In addition, plastic media is also quieter than abrasive chips.

Burrs, to begin with, are the unwanted raised edges of a plastic or metal after it (the plastic or metal) has undergone a manufacturing process. Any material used to give the final touch to a product or a part of a product is classified as media.

The last thing you’d want on your metallic component is burrs. Not only are they (burrs) responsible for the component breakdown, but they also alter the measurements or dimensions of a part, causing inaccuracy and damage. In this article today, you are going to see:

  • What plastic deburring media is
  • How plastic deburring media is used and,
  • The advantages of using plastic as a deburring media

Keep reading this article to find out more.

Plastic Deburring Media – A Clear Definition

Before you get to jump right into plastic deburring media, you first have to understand what plastic deburring is.

Plastic deburring is the process of removing the unwanted raised edges from plastic or metal. Nowadays, deburring is significantly expensive. Why?

Deburring is expensive because parts nowadays are becoming smaller, forcing manufacturers to become more precise. It is challenging to deal with smaller pieces.

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As the deburring process is quite expensive, you are ultimately forced to choose the right deburring solution. You can consider reducing the size of a burr to minimize the cost of deburring for starters.

aluminum parts deburring with plastic media

Now, plastic deburring media can be used to handle different types of burrs. Plastic deburring is mostly used on soft metals like aluminum and brass.

Using plastic deburring media reduces weight by 30%, compared to using ceramic media. Also, plastic media is good because it does not discolor the metal.

Also, plastic deburring media will produce a smooth finish, but the finish will not be shiny. Plastic tumbling offers you the best surfaces.

You’d probably by now want to know how this deburring using plastic media is done.

Keep reading further to find out how it is done.

How to Deburr Components using Plastic Media

First things first – you must choose an appropriate method of deburring components because not all components can be deburred using plastic. Most metals are too heavy for plastic abrasives.

Subsequently, the type of deburring being carried out will determine the shape, size, and nature of the abrasives you will use.

Plastic media can generally be used for soft metal deburring, polishing, precision deburring, and burnishing on threaded parts of brass and aluminum and other plastics.

The good thing with plastic abrasive media is that it wears down slowly. Also, the smaller the media, the better the output; however, this will consume more time and energy.

plastic deburring media

Secondly, for you to have more exceptional component output, you will need to have a crystal understanding of the shape and size of the abrasive media to use for deburring.

These media must get access to all recesses and holes for the most excellent product output. They should not pass through these holes; neither should they be too big to gain full access.

As such, you are supposed to measure the holes in a component. Afterward, you should select a media that is small enough to go through holes easily or a media that is large enough that will not fit into those spaces.

The reason as to why shape and size are essential for your product is because the media should get in contact with all the surfaces.

Thirdly, another factor that you’ll need to consider is how aggressive your media should be. The aggressiveness will depend on the degree of fineness you require.

Here’s the bottom line:

For the fineness of your component, you need to choose the right type of media to use, the right shape and size, and finally, its aggressiveness.

plastic deburring media


Merits of using Plastic as a Deburring Media

Here’s the truth:

Plastic media is perceived as an unlikely component that can be used to deburr other components. Its light-weight has proven it to be a better candidate. Here’s how:

Firstly, the plastic media is 40% lighter than ceramic media, making it (plastic) more convenient. Also, its popular tumbling shape (tetrahedron) prevents issues from doing with work-pieces lodging into components.

Secondly, plastic is used as a deburring media to hard metals provided that the metals have already undergone ceramic media deburring. This produces a better result, though it is quite expensive.

Thirdly, plastic is not as inflictive as ceramic, in terms of surface refinement. Using plastic media, metal surfaces will not get damaged as compared to using ceramic media.

Lastly, and this is the best reason why you can prefer using plastic media to ceramic media is that plastic media has become common. This is as a result of its non-cracking and non-chipping feature, making it a suitable candidate for finishing machine parts.

Plastic deburring media is applied to:

  • Smoothen plastic and rubber
  • Deburr aluminum and brass
  • Round the edges of softer parts of a component
  • Pre-plant finishing of components
  • Removing machine lines that are made during the development of an element.

plastic media smoothing stainless steel

In Conclusion

As we summarize this topic, did you learn anything from this article?

Burrs are unwanted, raised edges of a plastic or metal after it (the plastic or metal) has undergone a manufacturing process.

Burrs are responsible for breakdowns and inaccurate measures of component dimension, which may lead to loss in terms of life and also monetary loss.

Media is any material used to give the final touch to a product or a part of a product.

Using plastic as a deburring media has lots of benefits, compared to other types of deburring media such as ceramic deburring media.

Deburring has become quite expensive nowadays because of the smaller products that are in production nowadays. As such, more precise methods of deburring have to be implemented by firstly developing systems that will not produce a lot of burrs.

Always begin by choosing an appropriate deburring method first, then select the proper material and its size that will procure the most excellent output.

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