Tag Archives: Plastic Media

Non-Foaming Plastic Media Optimizes Finishing Process

While the optimization of mass finishing processes mostly focuses on the machinery utilized, Dörfler & Schmidt Präzisionsfinish GmbH (Dörfler & Schmidt) has shown that a simple shift such as using a different media can create significant process optimization.

By switching to a new, non-foaming plastic media from Rosler, the post-processor achieved improved process stability, productivity, and efficiency.

Meeting Varied Needs

Founded in 1998, Dörfler & Schmidt offers a wide range of surface finishing including deburring, edge radiusing, surface smoothing and polishing, creating matte and textured finishes, descaling, and cleaning.

The family-owned business located in Kammerstein, Bavaria, works with automotive, machinery building, electronics, medical engineering, jewelry, and a variety of consumer goods customers.

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Mass Finishing Media, Part 2 – Tips for Measuring Media-to-Work Piece Ratio

Maintaining the right ratio of media to work pieces is essential to achieving precise, repeatable results in mass finishing processes where work pieces and media loosely tumble in the processing bowl.

Ensuring that the work pieces are properly embedded in the media allows the media to perform its designated grinding or polishing function as well as cushioning the work pieces from damage caused by part-on-part impingement.

Building upon our last post on the series about navigating the complex media selection considerations, Rosler’s team of experts now discusses tips for determining the best media-to-work piece ratio.

Basic Rule of Thumb

The standard ratio of media to work pieces is around 3-to-1 by volume – meaning that the mix is 3 parts media to 1 part of work pieces – but the exact ratio varies based on the aggressiveness of finishing required as well as the work piece’s material, shape, size, weight, and delicacy or lack thereof.

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Mass Finishing Media, Part 1 – Don’t Navigate the Complex Selection Process Alone

The importance of the media selection in any surface finishing process cannot be emphasized enough. These consumables are essential “precision tools” for achieving the specified finishing results.

Selecting the right media is a complex task. That’s why you should consult an expert such as Rosler for guidance.

Even after a mass finishing process has been established, the media status must be constantly monitored and, if necessary, corrected. When different work pieces are processed or finishing tasks are altered, exchanging the currently used media type with another may be required.

Careful and collaborative media selection is crucial to a mass finishing success.

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3 Things To Consider When Purchasing Mass Finishing Media

Whether it be a process for polishing, surface cut downgrinding, deburring, cosmetic finishing, or just cleaning, an appropriate media is available. Choosing the media can seem daunting at first, with over 1700 various media and compounds available. Therefore, sample trials are of significant importance.  Here are three considerations to think about when choosing the right media: Read more about media purchasing considerations

The Importance of Vibratory Finishing Media, Compound and Their Production


Range of compounds and media
Range of compounds and media

The quality of consumables used in mass finishing is a key factor in surface processing.  Using consumables with a consistent high quality is crucial to attain set surface specifications, process times, costs and to manage considerations to any environmental impact.

There are in excess of 1700 types of vibratory media consisting of various shapes, sizes and incorporating a percentage of abrasive.  These are divided typically between ceramic and plastic families.

Ceramic Media Production

Ceramic media
Ceramic media

A ceramic media has a higher density than that of plastic media.  Ceramic chips of various shapes and sizes are formed, fired and held at certain temperatures and durations; providing an infinite range of variation and capability.

A consistent, supreme quality media is extremely important for the user to obtain a uniquely stable and reproducible surface finishing result.

Ceramic media is manufactured to exacting standards, controlled  in a fully-automated way.

Plastic Media Production

Plastic media
Plastic media

The manufacture of the plastic media is also totally automated.

The plastic media is of a lower density than that of the ceramic media, therefore it is suitable for a more gentle treatment of  critical component parts and softer metals.

The process involves mixing, forming and curing of the media and the whole process is computer controlled and continuously monitored.  This quality standard ensures a consistent wear and cutting performance, and repetitive results during the finishing process.

Surface Finishing Compounds

The right compound for any mass finishing application
The right compound for any mass finishing application

Compounds can be added to the vibratory process, optimising the surface specification for: degreasing, brightening, polishing, corrosion protection and producing surfaces free of stains.

Another important function is keeping the process clean.  The compound continuously flushes tiny metal particulates from the chip media and other contaminants out of the mass finishing system, keeping the media active and the parts free from contamination.

Depending on the specific process, compounds will provide various options of acidity and alkalinity as a pH factor.

Despite compounds being used for many years in mass finishing applications research and development constantly progress new formulations for special applications.

The range of different compounds is broadly diversified:

  • Liquid compounds
  • Recycling compounds
  • Powder compounds
  • Grinding compounds
  • Polishing compounds
  • Dry-polishing compounds
  • Cleaning (degreasing) compounds

Click here for further information on chips and compound


Post written by
Sandra Banks
Personal Assistant / Digital Marketing


Mass Finishing Media – Considerations: Choice And Use

The term ‘media’ as used in vibratory finishing / centrifugal finishing refers to the aggregate which carries out the work required on the component.Ceramic

The media carries out a number of important functions apart from actually working on the parts.

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