Tag Archives: shot blasting

Science Research Technology

Walther Trowal opens the „North American Tech & Training Centre“

Mass finishing, deburring, polishing, shot blasting and coating: The branch in Michigan now has its own process development center and offers comprehensive service for North- and South-America

Walther Trowal opens the  "North American Tech & Training Centre"

In the Test & Training Center: Loading of work pieces into a CF rotary vibrator for processing.

To cope with the increasing business volume in the Americas and to better serve the American customers in the field of surface finishing and preparation, Walther Trowal is expanding its sales branch in Grand Rapids, established in 2005, with additional manpower and a process development lab. Recently the Walther Trowal LLC has officially opened its „North American Tech & Training Center“.

The company, initially established as a sales office, has become an operation with its own test center, after-sales service activities and a sizable warehouse for compounds, media and spare parts. Effective immediately two recently hired application and sales engineers, stationed in Grand Rapids, are now supporting the already existing nine distributors in the US and Mexico, including our sales office in Queretaro, Mexico.

Moreover, the newly established process development lab, equipped with a range of different finishing machines, now offers American customers the possibility to test the Walther Trowal equipment with their work pieces directly in the United States and to optimize their finishing processes.

Ken Raby, Vice President and General Manager of the Walther Trowal LLC, is now in a position to serve his North-American customers even better: „We consider close proximity to our customers as essential to our future success. With our expanding sales and technical base in Grand Rapids we can adapt our processes and systems much better and, especially, much faster to the requirements of the American users. Especially in the field of mass finishing it is essential to develop and optimize the various finishing processes for our customers through processing trials under manufacturing conditions in our test lab“.

The new „Tech & Training Centre“ is also equipped with a lab for coating technology. This allows the customers to test various coating methods and develop the right process for their coating requirements with the „Trowal Coating“ technology.

Christoph Cruse, general sales manager at Walther Trowal in Haan, explains why the company is expanding its presence in North-America: „The North-American market is somewhat different from Europe – Especially in the United States the automobile industry is still a key player, but is subject to enormous cost pressures. That is why it is essential for us to offer our customers fast and competent service. Long reaction or downtimes are no longer acceptable! In addition, we also see a tremendous potential in the rapidly expanding aerospace industry and medical engineering.“

In Latin America Walther Trowal has also expanded its presence with the recently opened sales office in Queretaro, Mexico. The local staff is supported by the knowhow and service of the colleagues in Grand Rapids.

The capacity of the new, large warehouse ensures that the Walther Trowal LLC can offer short delivery times for equipment and consumables. The mass finishing, shot blasting and coating equipment as well as the plastic finishing media are still supplied from the Walther Trowal headquarters in Germany. Ceramic media continue to be manufactured at the plant in Stoke-on-Trent, Great Britain.

Facts about Walther Trowal

For more than 85 years Walther Trowal has offered 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.

Company-Contact
Walther Trowal GmbH & Co.KG
Georg Harnau
Rheinische Str. 35-37
42781 Haan, Germany
Phone: +49 2129.571-0
Fax: +49 2129.571-225
E-Mail: info@walther-trowal.de
Url: http://www.walther-trowal.de

Press
VIP Kommunikation
Regina Reinhardt
Dennewartstraße 25-27
52068 Aachen, Germany
Phone: +49.241.89468-24
Fax: +49.241.89468-44
E-Mail: reinhardt@vip-kommunikation.de
Url: http://www.vip-kommunikation.de

Science Research Technology

Walther Trowal: New Rotamat coater for small batches

Coating of mass-produced small parts: Effective coating of part batches from 2 to 15 l (0.5 to 4 gallons)

Walther Trowal: New Rotamat coater for small batches

The new Rotamat R 60 from Walther Trowal was developed for batches of up to 15 l (4 gallons)

At the PaintExpo 2018 Walther Trowal introduces the new Rotamat R 60 for coating mass-produced small parts. It allows the effective processing of small batches of, among others, metal parts with relatively high bulk weights. Even though specifically designed for small batches, the R 60 coater offers all the functional features of its larger „siblings“.

With the new Rotamat R 60 Walther Trowal is rounding off its equipment range for coating mass produced bulk parts down to very small batches. For the very first time it is now possible to effectively coat small part volumes of up to 15 liters (4 gallons).

With a drum diameter of only 600 mm (24″) this coater is ideally suited for processing small part batches like, for example, in the aerospace industry, where batch sizes rarely exceed 50 l (13 gallons). Of course, this also includes metallic work pieces with high bulk weights, which might get damaged in larger drums through the intensive part-on-part contact. These include spikes for snow tires, bullets and balancing weights.

Frank Siegel, the sales manager for „coating technologies“ at Walther Trowal can now offer the right machine for practically any coating application: „We have many customers who must coat small part batches but do not want to give up the high quality standard we achieve with our Rotamat models R 80 and R 90. With the new R 60 coater you can now effectively process small part batches without having to invest in a larger machine“.

The Walther Trowal R 60 Rotamat coater, introduced at the PaintExpo 2018 includes all the proven design features of the larger machines like the supply and exhaust air handling system, the explosion-proof LED lighting of the drum interior and the drum drive shaft mounting.

Technical details
Precise control of the supply air temperature

The temperature of the supply air is measured directly at the entry point into the drum. This is considerably more precise than the previous measuring point, where the sensor was placed at the exit of the heating unit. The result: A much more accurate control of the air temperature in the drum.

Eco-friendly operation

Like the larger models, the Rotamat R 60 incorporates a 4-stage exhaust air filtering system with a paper labyrinth filter, a filter mat and two bag filters.
Low energy consumption

Walther Trowal sized the heating unit to reflect the smaller drum diameter. This resulted in a considerably lower heat input. Depending on the physical properties of the work pieces the R 60 Rotamat can be equipped with a PID or step control of the heating unit. The result: The customers can now use coating materials, which cannot exceed or fall below certain temperatures.

Suitable for high solvent concentrations

The supply air volume in the new R 60 coater is measured with a Pitot tube. This allows the precise calculation of the solvent concentration and facilitates the certification of the machine for a high solvent throughput. This is very important for special applications like, for example, the coating of parts with an adhesion primer.

Walther Trowal at the PaintExpo 2018
17. to 20. April 2018 | Karlsruhe/Germany
Hall 2, Stand 2310

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.

Company-Contact
Walther Trowal GmbH & Co.KG
Frank Siegel
Rheinische Str. 35-37
42781 Haan/Germany
Phone: +49 2129.571-0
Fax: +49 2129.571-225
E-Mail: info@walther-trowal.de
Url: http://www.walther-trowal.de

Press
VIP Kommunikation
Regina Reinhardt
Dennewartstraße 25-27
52068 Aachen/Germany
Phone: +49.241.89468-24
Fax: +49.241.89468-44
E-Mail: reinhardt@vip-kommunikation.de
Url: http://www.vip-kommunikation.de

Politics Law Society

Walther Trowal cuts processing times for finishing of blisks from several days to a few hours

Surface finishing of components for the aerospace industry

Walther Trowal cuts processing times for finishing of blisks from several days to a few hours

The work bowl of the “CM” rotary vibrator.

For the efficient surface finishing of high value work pieces like blisks for airplane and land based turbines, Walther Trowal has redesigned its CM vibratory system. It ensures that the work pieces receive a uniform, homogeneous high quality finish with absolutely repeatable results.

The surface finish of blisks („Blade Integrated Disks“) in airplane and other turbines affects to a large extent the airflow characteristics and, thus, the overall efficiency, fuel consumption and noise emissions.

To date the surface finishing of blisks was done manually with grinding disks and other manually operated tools. Due to the „human factor“ the quality of the final finish could greatly vary between work pieces. Frequently, it could even happen that certain surface areas were not finished at all.

For the consistent and high quality finishing of circular high value components Walther Trowal redesigned the rotary vibrator „CM“ in close cooperation with leading turbine manufacturers to make it more suitable for treating all kinds of turbine components.

The „CM“ system allows deburring and general surface improvement of components with diameters of up to 980 mm.

Single work pieces are mounted to the inner dome of the processing bowl. The height of the inner dome itself has been drastically shortened. After grinding media has been filled into the bowl, a vibratory motor causes the complete work bowl to vibrate. This causes a constant „rubbing“ of the media against the fixed work piece. Since the „rubbing“ action is highly homogeneous, a uniform, even finish on all surface areas of the disk and blades is achieved. After completion of the process the surface roughness readings amount to Ra = 0.2 to 0.4 µm.

Starting with an initial surface roughness of Ra = 4 to 5 µm, the desired finishing results are achieved within about five to six hours. Compared to this innovative method the manual finishing of blisks can take several days.

Christoph Cruse, sales manager at Walther Trowal, is commenting on the special conditions prevailing in the aerospace industry: „Especially for the production of turbine components any manual manufacturing operations must be viewed with great skepticism, because the quality of the work will vary greatly. With our new finishing machine we have completely eliminated the vagaries of the human factor. And, we can reduce the finishing times for blisks from several days to just a few hours“.

For finishing of blisks Walther Trowal is recommending the special finishing media, type V 2030. This media produces very smooth surface finishes on materials and shapes, which are typical for blisks. Of course, the V 2030 media is globally approved for the aerospace industry.

Walther Trowal at Singapore Airshow, February 6 – 11 2018
Booth L82

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.

Company-Contact
Walther Trowal GmbH & Co.KG
Martin Huebner
Rheinische Str. 35-37
42781 Haan/Germany
Phone: +49 2129.571-209
Fax: +49 2129.571-225
E-Mail: m.huebner@walther-trowal.de
Url: http://www.walther-trowal.de

Press
VIP Kommunikation
Regina Reinhardt
Dennewartstraße 25-27
52068 Aachen/Germany
Phone: +49.241.89468-24
Fax: +49.241.89468-44
E-Mail: reinhardt@vip-kommunikation.de
Url: http://www.vip-kommunikation.de

Science Research Technology

Aluminum components require soft, less abrasive blast media

New blast turbines with curved throwing blades reduce cycle times.

Aluminum components require soft, less abrasive blast media

The troughed belt continuous feed shot blast machines, type THM, with curved throwing blades reduce

At the Aluminium 2016 trade show Walther Trowal introduces a new generation of blast turbines for the troughed belt continuous feed shot blast machines, type THM. These turbines increase the throwing speed and, thus, reduce cycle times for shot blasting of light metals like aluminum and magnesium. For weight reasons these two metals are increasingly replacing components, which to date were made from steel. However, shot blast applications for aluminum and magnesium frequently require soft, less abrasive blast media like, for example, aluminum shot.

When it comes to shot blasting die-castings or forged components made from aluminum and magnesium, but also zinc, many users are switching to somewhat softer aluminum blast media. Yet, because of their lower bulk density the impact energy of these media is significantly lower compared to other media like steel shot. For this reason, Walther Trowal recently developed turbines with curved throwing blades, which generate significantly higher throwing speeds.

In addition to higher throwing speeds, the new turbines also allow a much higher media throughput. Despite the lower media bulk weight of these „soft“ blast media the results are shorter cycle times an, at the same time, greatly improved surface finishes.

Since the throwing blades in the new turbines are curved on both sides, the turbines can be run in two directions.

For applications requiring steel and stainless steel blast media, Walther Trowal offers the curved throwing blades in wear resistant tool steel. This increases the overall blade uptimes significantly.

The first machine equipped with the new turbines will be delivered to a customer shortly. Of course, existing THM machines can be easily equipped with the curved blade turbines allowing the users to increase productivity and reduce their costs.

Walther Trowal at the Aluminium 2016 trade show
(Dusseldorf/Germany, November 29 – December 1, 2016):
Hall 12 / Booth G 50

Background:

Troughed belt continuous feed shot blast machines: Extremely gentle work piece transport

The THM continuous troughed belt machines can handle large quantities of bulk produced small parts as well as large, delicate single work pieces with complex shapes. Because of the much simpler and gentler work piece handling they frequently replace conventional batch tumblast machines.

THM continuous feed machines are especially advantageous for treating very delicate components: Contrary to batch tumblast systems, where the parts are intensively tumbling over each other with a high risk of nicking, in the Walther Trowal THM machines the work pieces are spread out throughout the length of the trough, ensuring a gentle, nick-free processing. The work pieces are gently rolling over the transport rods coated with polyurethane. This gentle part transport is especially important for complex, thin-walled components requiring an intensive blast cleaning process. The results are perfectly cleaned parts without any nicking or other damage.

Compared to spinner hanger machines the THM continuous shot blast systems also offer significant technical advantages. Because the work pieces are gently tumbling through the tunnel formed by the troughed belt, they are exposed to the blast stream from all sides, with the distance between work pieces and turbines remaining constant. This ensures all around, perfect shot blasting results.

Aluminum: The gentle blast media

The blast cleaning and de-flashing of die-cast or forged aluminum components requires soft blast media. Typical forged parts are steering knuckles or swivel bearings. Aluminum die-castings processed in THM systems can be housings, covers, caps and levers.

But there is also an increasing trend towards utilizing magnesium die-castings, especially in the automobile industry. Many structural components, for example dashboard mountings, are made from magnesium. This material has not only a low weight, but also offers high tensile strength.

For shot blasting of these materials in THM machines aluminum media is becoming quite popular. Since the distance between the blast turbines and the work pieces is very small, the shot blast process is highly effective, even though the blast media has a low bulk density.

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.

Firmenkontakt
Walther Trowal GmbH & Co.KG
Georg Harnau
Rheinische Str. 35-37
42781 Haan/Germany
+49 2129.571-209
+49 2129.571-225
g.harnau@walther-trowal.de
http://www.walther-trowal.de

Pressekontakt
VIP Kommunikation
Regina Reinhardt
Dennewartstraße 25-27
52068 Aachen/Germany
+49.241.89468-24
+49.241.89468-44
reinhardt@vip-kommunikation.de
www.vip-kommunikation.de