Partnership Provides Excellent Finish for Deep-Drawn Medical Components

Deep-drawn functional components are increasingly being utilized in the production of medical and pharmaceutical products. To meet the strict standards for manufacturing and quality management in the field of surface finishing, Hubert Stüken GmbH & Co. KG has relied on mass finishing solutions and consumables from Rosler for more than 30 years.

Founded in 1931, Hubert Stüken GmbH & Co. KG is a family-owned business with manufacturing operations at five locations in Europe, Asia, and the United States. Its product range includes stamped and bent parts, plastic-coated components, and complex assemblies.

Rosler works with Stüken Medical, the company’s medical business division which focuses on medical and pharmaceutical engineering, to meet the increasing demand for deep-drawn metal components.

Andreas Hellman, Manager of the ISO 13485-certified business division, explained, “Components used in the field of medical and pharmaceutical engineering must meet strict quality standards. The same strict standards apply also to the actual production operations. For this reason, we have pooled the required know-how for the development and production of such precision components at Stüken Medical.”

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Single-Source Supplier Helps Job Shop Operation Expand into New Markets

As a supplier of mass finishing and shot blasting equipment as well as consumables and service, Rosler understands the need for multi-faceted operations and the corresponding flexibility, cost-effectiveness, and innovation required to be successful.

B+S Metallbearbeitung GmbH (B+S), a job shop based in Southern Germany, also provides various surface finishing services. Its multi-faceted mass finishing operations include deburring and polishing as well as shot blasting, part cleaning, and packaging.

B+S handles a broad range of work pieces with different shapes, made of different materials, requiring different finishes, and coming from all kinds of industries. To create a streamlined and one-stop supplier, B+S chose to work with Rosler for its surface finishing equipment and consumables.

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Shot Blasting 101

Shot blasting is a specialized surface finishing process where small metal (or mineral) pellets, called blast media, are thrown onto the surface of a work piece at incredibly high speeds. With rates of speed ranging from 200-800 feet per second, the impact on the work pieces from this process is what produces the desired surface finishing effect.

Shot blasting can help achieve surface cleaning, surface preparation, descaling, deburring, deflashing, and shot peening.

The process components of a shot blasting system include a shot blast machine, raw and finished work pieces, blast media, dust, and other byproducts. Rosler has more than 80 years of experience in developing comprehensive shot blasting systems.

The two most common types of shot blast machines are turbine blasting and air blasting.

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Interlinked Mass Finishing and Cleaning Systems Half Processing Time

Because of a positive experience with four continuous flow washing machines operating at its headquarters, VIA Oberflächentechnik (VIA) decided to work with Rosler for a comprehensive mass finishing and cleaning operation.

The resulting interlinked system meets the most demanding cleanliness specifications while achieving significant cycle time reductions and cost savings and providing a high degree of operational flexibility.

The Situation

Headquartered in Lennestadt, Germany, VIA sought an integrated solution for de-oiling, mass finishing, and deep cleaning of stamped and formed parts. 

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Mass Finishing Work Piece Handling Series, Part 3 – Maintaining Wear Linings

Adequate wear linings are an important factor in ensuring work pieces are efficiently handled in a mass finishing machine. Along with the method speed of transfer as well as the media selection and separation, the condition of a machine’s wear lining factors into the quality of process results.

Thick linings assist with work piece handling by providing a cushioning effect, yet thin or damaged wear linings allow unwanted knicks, scratches, and dings.

With more than 80 years of expertise in surface finishing, Rosler can assist with all aspects of your mass finishing process including proactively eliminating potential work piece handling issues.

Observing Machine Conditions

Regularly checking the lining of your work bowl(s) and trough(s) for wear is one way to ensure parts don’t get accidentally damaged during processing. Inspecting linings consistently will help identify repairable issues before permanent damage to the machine occurs.

To effectively finish work pieces, media must be matched to the specific finishing task and the initial state of a work piece.

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Testing & Expertise Overcome Shot Blasting Challenges

For nearly a decade, Sales Representative and Interim Product Manager of Turbine Blast Equipment Zack Murray has been one of Rosler’s top shot blasting experts. 

Working with customers and our global Customer Experience Centers, he helps develop and test surface finishing machines and media in addition to dialing in specific process parameters.

At times, adhering to the Rosler motto and guiding principle of “finding a better way…” can be difficult and complicated. Luckily, Murray and the entire Rosler team are committed to delivering world-class surface finishing equipment, consumables, and service in a variety of industries.

In this post, Murray shares the most challenging issue he has tackled at Rosler and how the team developed a solution.

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Blade Technology: Straight vs. Curved Blades Explained

As an expert in the shot blasting industry, Rosler knows about blade technology. All shot blasting machines require blades to propel media towards workpieces. While both straight and curved blades are used, each type offers advantages and disadvantages.

What are the Differences?

Straight blades are, as the name suggests, blades that do not have curvature when viewed from the side and do not possess tangential curvature with respect to the turbine. Curved blades are blades that have some degree of curvature when viewed from the side.

As the newer design, curved blades are generally better than straight blades, but they also have some drawbacks related to longevity, maintenance, and cost of ownership.

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How to Use a Vibrascope to Measure Vibratory Bowl Amplitude and Frequency

When it comes to mass finishing, amplitude and frequency require balance and careful consideration. Amplitude is a measure of movement and intensity while frequency refers to the rate of repetition.

The wrong amplitude, for example, can create lackluster finishing results and longer processing times if it is too low. If too high, it can cause unnecessary wear and tear on the machine.

Creating Vibratory Energy

Whether rotary or tub style, mass finishing vibrators always include two key components: a work bowl containing the finishing media and the work pieces.

Firmly attached to this work bowl is a vibratory drive system generating the energy to put the media and work pieces in motion. The work bowl with an attached vibratory drive system sits on a number of coil springs – in some cases on air cushions – which in turn sit on a machine base. The springs, respectively, act as air cushions allowing the work bowl to “free float” up and down within a certain distance.

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New Deflashing Equipment Assists 30-year Customer Increase Production

For over 30 years, Berker GmbH & Co KG (Berker) has trusted Rosler shot blasting equipment in its manufacturing processes.

A member of the Hager Group since 2010, Berker is one of the leading manufacturers of high-end electrical components, from timeless classical switches to intelligent electrical systems for buildings. The company also supplies switches for electrical appliances and automobiles.

The Situation

Berker primarily uses continuous feed systems such as loop and flat belt machines to deflash plastic components including switching elements, electrical outlet covers, frames, and more.

Increased production volume at its Wenden-Ottfingen manufacturing location led Berker to decide to invest in an additional shot blast machine in 2018. The new investment was intended to replace an existing continuous feed loop belt system with the latest deflashing technology.

Its specifications called for increased capacity and high equipment availability.

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Hot Air and Media-Based Systems Offer Drying Options for Mass Finishing

With few exceptions, mass finishing processes require the addition of water and compounds to produce the desired results. That means finished work pieces discharged from the finishing machine are wet.

Since possible corrosion or problems with subsequent manufacturing steps are possible, the finished work pieces must undergo a drying operation. While not as complex as the mass finishing process itself, drying nevertheless requires careful consideration to ensure that the work pieces are completely dry and free of any water or dirt spots.

Rosler has extensive experience developing dryers for a wide range of work pieces and the expertise to assist with process parameters and settings.

Work Piece-Based Machine Settings

Machine settings for speed and temperature must be matched to the work pieces and their surface condition to ensure the lowest possible energy use to complete the task.

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Shot Blasting and Mass Finishing Surface Finishing Experts

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