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The new generation of Trowal continuous shot blast machines is in operation

A Mexican manufacturer of automotive aluminum die-cast components now operates five continuous shot blast systems from Walther Trowal.

The new generation of Trowal continuous shot blast machines is in operation

The new THM troughed belt continuous shot blast machine equipped with turbines with curved throwing.

Walther Trowal has recently commissioned a THM troughed belt continuous shot blast machine for a customer in Mexico that is equipped with a brand new generation of blast turbines. These turbines were specifically designed for shot blasting of aluminum components. With a considerably higher blast media throwing speed the new turbines produce significantly shorter cycle times than the predecessor models.

The Mexican customer already operates very successfully four continuous Trowal shot blast machines. Because of their excellent performance he chose to purchase another THM machine, when he had to expand his production capacity.

Up-and-coming: Aluminum, the gentle blast media

The increasing sales trend at Walther Trowal indicates that ever more customers are switching to aluminum media when shot blasting aluminum components. Because of its lower bulk density aluminum media is a lot gentler than, for example, stainless steel shot. Typical automotive forgings made from aluminum are, for example, steering knuckles or swivel bearings. Aluminum die-castings processed in THM shot blast machines can be all kinds of housings, covers or levers.

Because of its lower density the impact energy of aluminum media on the work pieces is considerably lower compared to other blast media. To offset this limitation Walther Trowal developed turbines with curved throwing blades, which generate a significantly higher blast media throwing speed than straight blades. This, combined with the fact that in THM machines the turbines are located very close to the work pieces, and the media throughput is considerably higher, results in optimized energy utilization and surprisingly short cycle times. However, the shot blast treatment remains very gentle. In short, despite the relatively low density of aluminum blast media, the shot blast process is highly effective and at the same time surprisingly gentle preventing any warping or distortions of delicate work pieces.

Another benefit of aluminum blast media is that it reduces the wear rate in the turbines and the machine to a fraction of the wear caused by steel shot, resulting in higher uptimes and lower operating costs.

Walther Trowal offers a range of different machine sizes equipped with up to four turbines. For example, for forged aluminum components the new THM 700/4/E with 4 turbines and a power of 15 kW for each turbine, produces an exceptionally high degree of productivity.

Specifically designed for handling aluminum media

To meet all the challenges posed by aluminum shot the Trowal engineers redesigned many machine assemblies, among them the media dosing system and the turbines. One detail of many: A rough surface of the throwing blades would quickly destroy the aluminum particles. Therefore, Walther Trowal is smoothing the blade surface with in-house vibratory finishing equipment. The result: A greatly reduced blast media consumption, lower dust emissions and significantly improved turbine uptimes.

Gentle work piece transport

THM troughed belt continuous shot blast machines are equally well suited for treating mass-produced bulk parts or large, delicate components. Especially with delicate, somewhat fragile work pieces the THM concept offers significant advantages: In these systems the work pieces are evenly distributed through the entire machine length. This results in a very gentle transport and prevents intensive part-on-part collisions. And the fact that the transport rods are covered with a relatively soft PU further cushions the already gentle tumbling action. This is particularly important for fragile components with thin walls, allowing them to be discharged from the machine without any nicking or other damage.

No problem with older THM systems!

When developing the new turbines Walther Trowal also took into consideration the many older machines still in operation: Any THM customer who wants to take advantage of the new turbines can easily install them in his existing machine(s). This allows the customers to increase the efficiency of their shot blast operation with minimal costs.
For THM systems still requiring steel or stainless steel blast media, Walther Trowal supplies the new turbines with the curved throwing blades made from tool steel also offering significantly higher turbine uptimes.

Facts about Walther Trowal

For 85 years Walther Trowal has been a pioneer and market leader in various surface treatment technologies. The company offers modular and custom engineered solutions for a wide range of surface treatment problems.

Initially only making vibratory finishing equipment, over the years Walther Trowal has continuously broadened its product range and today offers a wide portfolio of equipment and services for improving all kinds of surfaces, e.g. mass finishing, part cleaning, shot blasting and drying of a wide spectrum of work pieces, last but not least, the coating of mass produced small parts.

Walther Trowal offers not only various types of equipment but complete surface treatment systems: By linking the various equipment modules and automating the complete process, we are able to precisely adapt our process technologies to the technical requirements of our customers. This also includes various types of peripheral equipment and process water cleaning and recycling systems. Of course, we also offer comprehensive pre- and after-sale service like sample processing in one of our demonstration labs and global repair and maintenance service.

Walther Trowal serves many customers in many industries around the world. For example, in the automotive and aerospace industry, medical engineering and wind power generation.

Walther Trowal GmbH & Co.KG
Georg Harnau
Rheinische Str. 35-37
42781 Haan/Germany
+49 2129.571-209
+49 2129.571-225

VIP Kommunikation
Regina Reinhardt
Dennewartstraße 25-27
52068 Aachen/Germany

Environment Energy

Fresh breeze at the IFAT ENTSORGA 2012: HOK activated carbon based on lignite is an adsorption and catalyst material much in demand for sewage and waste-gas cleaning

Fresh breeze at the IFAT ENTSORGA 2012: HOK activated carbon based on lignite is an adsorption and catalyst material much in demand for sewage and waste-gas cleaning

Cologne. – Lignite from the Rhenish mining area is not only an indispensable fuel that contributes just under one quarter to Germany’s power generation. HOK activated carbon, exclusively made on the basis of Rhenish lignite, also serves to reduce emissions worldwide and, in doing so, also boosts environmental protection.

Its special properties in the separation of pollutants have made HOK activated lignite a much sought-after adsorption and catalyst material. Made by RWE Power AG on the basis of the natural product „lignite“, HOK is marketed worldwide by Rheinbraun Brennstoff GmbH (RBB) as a highly effective adsorbent.

Besides scrubbing waste gas in refuse incineration, one important use is the lowering of emissions in the iron and steel industry. One process usual there is the melting of iron and steel scrap processed in electric arc furnaces. In the thermal treatment of scrap contaminated with paints, oils and other organic substances, dioxins and furans emerge which need special reduction measures. Here, one of the simplest and at the same time least-cost scrubbing methods has turned out to be HOK-based adsorptive waste-gas cleaning in an entrained dust cloud.

HOK activated lignite for environmental protection worldwide

In the US, too, Rhenish activated lignite is making a contribution toward lowering airborne pollution. In addition to sulphur dioxide and nitrogen oxide, mercury constitutes a special challenge for US power plants. In this sensitive area, too, „Activated Lignite HOK“ has really proved its worth as effective adsorbent.

Biological sewage-treatment plants are another important field of application. These plants work on a kind of „manger“ or feeding-trough principle with the activated lignite supplying nutrients and oxygen to the micro-organisms that are needed to combat the pollutants.

The separation products contained in the water and on which the micro-organisms feed occur in increased concentrations on the porous lignite particles. This prompts more micro-organisms to settle, thus accelerating the filtering process.

Interested trade visitors are cordially invited to meet representatives of Rheinbraun Brennstoff GmbH at this year’s IFAT ENTSORGA, held from 7 to 11 May 2012, fair stand 514, hall A3, to find out about the latest product solutions and application examples in filter and environmental technologies based on activated lignite.

Please find further information on the internet at www.hok.de and www.ifat.de.

Aktivkoks wird auf Basis rheinischer Braunkohle im sogenannten Herdofenverfahren hergestellt. Die besonderen Eigenschaften der rheinischen Braunkohle in Verbindung mit den Aktivierungsbedingungen im Herdofen führen zu einem Aktivkoks, der seit vielen Jahren als preiswertes Adsorptionsmittel und Filtermittel in den unterschiedlichsten Anwendungen der Abgas- und Abwasserreinigung zum Einsatz kommt.

Rheinbraun Brennstoff GmbH
Dr. Volker Schulz
50226 Frechen
+49 (0) 221 / 42 58 12


Dr. Schulz Public Relations GmbH
Dr. Volker Schulz
Berrenrather Str. 190
50937 Köln
+49 (0) 221 / 42 58 12


Well-kept printers have a longer lifetime

Well-kept printers have a longer lifetime
eXtra4 care and cleaning products for thermal transfer printers

New to the eXtra4 range: Care product for label printers

Big or small – the investment for a label printer is supposed to pay off. It literally lies in every user“s hands as it only takes a few movements to bring a long lifetime to thermal transfer devices: Put some cleaning agent on a lint-free cloth, wipe quickly over the rubber rollers and sweep over the print bar with the tip of the cleaning pen – that“s it.

Cleaning agent 81 RW in plastic bottles of 250 ml and pen 81
TLP-RSTIF with a big tank last for at least 2 years with regular care intervals.

Care should be regular, however, as rubber rollers and print head are decisive for the print quality. They have to be free from residue such as paper dust, glue and ink ribbon particles. It is therefore recommendable to combine the care routine with the ink ribbon change. The printer has to be opened anyway to do this, and all relevant parts of the device are freely accessible then.

If care remains undone, this may considerably affect the print quality: The rubber rollers will lose their grip due to paper dust, the track guidance and therefore the print positioning will no longer be accurate.
Neglecting the print head is even more serious.

Dirt on the print bar may lead to overheat and to blow the heating elements of single pixels.
The results will be white skips or stripes in the print image. The typeface will become blurry, the barcode illegible and the entire print head will be irreparably damaged. It will have to be replaced.

Repairs involve effort and costs, but may be quite beneficial. Since regardless of whether an industrial device prints a large number of labels or whether a desktop device prints smaller numbers several times in a month – the core technology remains the same. And it does not become obsolete, not even over the years.

„We have customers who bought a thermal transfer device from us some 10 to 12 years ago and who have still been producing labels in top quality until today. From a purely technological point of view there is no reason for not having an old device repaired at least once or not having it simply overhauled“ says General Manager Alex Schickel. „This is still more favourable than to entirely replace it. High quality printers such as the ones that we at Ferdinand Eisele select from the market for the eXtra4 product range do have a long lifetime in terms of material and mechanics.“

New products are often only justified when they involve changes on the electronics, controls or ports side as well. Those who have what they require in this regard should not be afraid of repairs and should attach great importance to care – at best right from the start.
More information at http://www.extra4.com./

Das Unternehmen ist seit seiner Gründung 1931 durch die für den Standort Pforzheim typische Schmuckindustrie geprägt. Den ursprünglichen Kern des Produktprogramms bildet deshalb eine Vielfalt von Etiketten zur Auszeichnung von Schmuck und Uhren. Ob Ring-Etiketten oder Ketten-Etiketten, Etiketten für Ohrringe und Nadeln, Perlen-Etiketten oder Etiketten für Uhrarmbänder, selbst Etiketten für Brillen – für die ganze Warenpalette finden Goldschmiede, Juweliere, Schmuck-Großhändler und -Hersteller das passende Etikett zur Auszeichnung.
Eine Vielzahl an Extras, die das das Etikett, zum umfassenden Etikettiersystem ergänzen, bereichern zusätzlich die Produktpalette. Das Angebot reicht von Hardware, wie Thermotransferdrucker und Barcode-Scanner, bis zur Beschriftung via Etiketten-Software.
Mit „extra4“ bietet Eisele ein eigenes Etiketten-Druckprogramm, das auf mehr als 20 Jahre betriebsinterner Software-Entwicklung und langjährige Erfahrung mit Computer-Druckern im Unternehmen aufbaut. Nicht ohne Grund ist es in der Schmuck- und Uhren-Branche weltweit im Einsatz.
2006 bündelt die Ferdinand Eisele GmbH unter der Marke eXtra4 Labelling Systems ihre Angebots- und Leistungspalette für den internationalen Markt. Unter dem Label smaRT-Inventory führt das Unternehmen 2007 eigene RFID-Etiketten in der Branche ein und tätigt damit erneut einen richtungsweisenden Schritt auf dem Gebiet der Etikettierung von Schmuck, Uhren und Optik.

Ferdinand Eisele GmbH
susanne schickel
Carl-Benz-Str. 17
75217 Birkenfeld