WALTHER TROWAL –A global company with German roots.
As a manufacturer of standard and special machines for surface processing, we offer modular and customised system solutions. By automating and linking our systems, we can adjust the correct process to your needs and requirements. We also offer repair and maintenance services, as well as our test lab.
Using the perfect combination of machine, abrasive media and compounds, we can attune the mass finishing process to ensure that your workpieces have the surface you require.
Mass finishing, also known as trowalizing, is based on processes in nature. Here, sand and water grind down rough blocks of stone to smooth, perfectly rounded pebbles. What we do in modern manufacturing technology is no different. With the right combination of machine, abrasive media, compound and water, we can perfect virtually every surface precisely to your requirements, using processes ranging from mass finishing, deburring, polishing and descaling to cleaning, smoothing and rounding.
Effective and efficient, reusing process water (a mixture of water and compound) and feeding it back into circulation during mass finishing can help you both save costs and protect the environment.
RECYCLING PROCESS WATER – FOR YOU AND THE ENVIRONMENT
Water and compound are essential for trowalizing. In most mass finishing applications, these valuable resources can be cleaned in centrifuges and fed back into circulation. This not only saves costs, but also protects the environment.
RELIABLE DISPOSAL OF PROCESS WATERIn some applications, it is not possible to recycle the process water, such as when pickling with acids or when using various compounds. In such cases, the water must be cleaned in a flocculant unit and then disposed of.
See Also:
Drums and rotating barrels are the cost-effective solution for processing small workpieces – such as those in precision mechanics – in small and medium batch sizes. They are also suitable for fine finishing and polishing.
See Also:
After mass finishing, workpieces are generally wet or moist and must be dried. This is done using either a heated drying medium or hot air, depending on your individual needs.
See Also:
The right combination of process media can ensure the perfect processing results. Ceramic and plastic abrasive media, combined with compounds and special media, create the ideal surface.
See Also:
Our continuous units can be installed to continuously process your workpieces in the production process. The individual parts are added to the mass finishing machine in cycles, without interrupting the process.
CONTINUOUS TROWALIZING OF NON-SENSITIVE PARTSThe AV range of continuous units allows you to continuously process large quantities, with no need to interrupt the mass finishing process to add new workpieces. Thanks to the trough-shaped work bowl, you can process small and medium non-sensitive mass-produced parts (punched parts, die-cast parts, etc.), as well as larger parts (oil tanks, cylinder head covers, etc.).
THE BENEFITS AT A GLANCEHigh-value, delicate work pieces with complex shapes or work pieces made from tough, difficult to machine materials are mounted to special fixtures and dragged through a stationary bed of grinding or polishing media. Since the work pieces never touch each other during the process, they cannot scratch or nick each other.
APPLICATIONS:From deburring and rounding to high-gloss polishing, circular vibrators are universal mass finishing machines that can help you process a wide range of materials. You can use them for roughly pre-grinding workpieces, for example, or for producing surfaces ready for electroplating. Circular vibrators work extremely efficiently, making them suitable for use as both stand-alone units or as part of automated production procedures.
Thanks to their robust steel construction with reinforced imbalance drive, the CB circular vibrators are particularly suited for ball burnishing and pressure deburring.
THE BENEFITS AT A GLANCEDo you need to process large and sensitive workpieces? The CD circular vibrators with integrated screening unit offer you a universal solution.
THE BENEFITS AT A GLANCEOur CM circular vibrators are the perfect choice for large, heavy and sensitive parts. Supplied without an integrated screening unit, they are available with an optional pneumatic bowl outlet and moving separating plate.
THE BENEFITS AT A GLANCEMV multivibrators are our individual solution for fine finishing and polishing, offering high reproducibility and a uniform finishing pattern for fragile and work-intensive workpieces.
THE BENEFITS AT A GLANCEThis is the entry-level model among our circular vibrators. Seven different configurations with a range of different bowl sizes offer excellent efficiency and maximum cost effectiveness.
THE BENEFITS AT A GLANCE
In one single process the AM Multivibrators are smoothing out the surface roughness on 3D printed components, which among other reasons is caused by staircasing, support structure remnants and sintered-on powder residues.
YOUR BENEFITS AT A GLANCE:Perfectly suited to removing heavy burrs and for rounding edges on small and medium workpieces, Turbotron centrifugal disc finishing units have an abrasive action that is ten times stronger than that of circular vibrators, making them particularly efficient. Processing your workpieces in the centrifugal force tank can save both time and costs. Special process methods also enable fine finishing and polishing.
The two-batch principle helps you both improve productivity and minimise costly auxiliary process times. The centrifugal disc finishing units are also ideal for automating your processes, and are also available as a tandem version.
TWO-BATCH PRINCIPLE FOR COST-EFFECTIVE MASS FINISHINGWith a centrifugal disc finishing unit from our TT...A/2C range, you can process your workpieces quickly and increase productivity. The machine allows you to fill a second batch into the centrifugal force tank whilst the first batch is being separated on the screening machine. This helps you minimise costly auxiliary process times. It is also perfect for automating your processes.
THE BENEFITS AT A GLANCEIf you are searching for a custom solution for your mass finishing processes, the TT...B series is the best choice. The modular system allows you to fit the individual machines with feeders, screening machines and abrasive media return transport systems as required.
THE BENEFITS AT A GLANCECentrifugal disc finishing units from the TT...SM range have an attached screening machine and integrated hopper for abrasive media. After processing the workpieces, the entire unit pivots by 135° to separate the abrasive media and workpiece mass on the screening machine.
THE BENEFITS AT A GLANCETrough vibrators are ideal for workpieces that are too large for circular vibrators. Usually, the parts to be processed are simply placed individually in the trough. If you want to trowalize sensitive workpieces, these are either secured in special clamping devices or processed in separate chambers to avoid damage.
This mass finishing machine is perfect for trowalizing large and – if necessary – sensitive parts. It also boasts excellent value for money, and is ideal for ball burnishing and pressure deburring.
THE BENEFITS AT A GLANCEThanks to their "Multivib" drive, the TMV range of trough vibrators ensures intensive workpiece processing throughout the entire bowl length. The extremely powerful drive also makes the machines suitable for ball burnishing and pressure deburring.
THE BENEFITS AT A GLANCEThe selected blasting medium is directed towards your workpieces at high speed using blast wheels. This ensures high blasting performance and optimum use of energy. Using this technology in a continuous process offers several advantages over batch processing:
That is why our continuous belt blasting units are frequently used to replace conventional batch systems. With their easy workpiece handling and excellent blasting results, they are even used as replacements for suspended-line systems.
Gentle and effective processing for different-sized workpieces. The smart THM transport system ensures perfect processing. It also offers simple maintenance and can be adjusted flexibly to your needs.
THE BENEFITS AT A GLANCEThe Rotamat coaters are the economic solution for improving the surface of mass produced small parts by coating made from elastomers, metal or wood – for example, O-rings, handles, springs or screws.
Even parts that have a complex shape or are extremely delicate are discharged from the machine with a perfect coating and completely dry.
The coating process in the rotary drum is full automatic. The cost-intensive and time-consuming placing of the parts on special racks – required in conventional coating systems – is no longer necessary.
The Rotamat coater allows the use of a wide variety of different coating materials. Typical applications are:
50 litres of filling volume or 50 kg of weight. Electromotive tilting of the rotary drum.
Filling volume up to 75 l or 100 kg weight. Electromotive tilting of the rotary drum, two-handed operation for opening the cover.
The work pieces are gently tumbling over each other in the rotating drum. The resulting intensive mixing effect evenly exposes the work pieces to the spay pattern of the spray gun at different angles – a pre-condition for an even coating thickness.
The special drum shape and the adjustable rotary speed ensure an optimum tumbling and mixing of the work pieces. The drum inclination is infinitely adjustable within a certain angle and can, thus, be precisely adjusted to different work piece shapes. The ideal angle of inclination for the various coating processes is determined by processing trials and then stored in the machine controls.
Different drum sizes for different part volumes are available. Exchanging one drum with another is easy and requires very little time. This allows adapting the Rotamat quickly to different batch sizes or coating processes. If required, the inside of the drums can be lined with a 3S-coating. In addition, the inside of the cover and the drum housing can be coated with an anti-adhesion material.
Effective and efficient, reusing process water (a mixture of water and compound) and feeding it back into circulation during mass finishing can help you both save costs and protect the environment.
RECYCLING PROCESS WATER – FOR YOU AND THE ENVIRONMENTWater and compound are essential for trowalizing. In most mass finishing applications, these valuable resources can be cleaned in centrifuges and fed back into circulation. This not only saves costs, but also protects the environment.
RELIABLE DISPOSAL OF PROCESS WATERIn some applications, it is not possible to recycle the process water, such as when pickling with acids or when using various compounds. In such cases, the water must be cleaned in a flocculant unit and then disposed of.
After mass finishing, the process water contains abraded material from the metal and abrasive media. Oil and dissolved metals are also often present. When cleaning in a centrifuge, the solid particles are removed from the contaminated water and separated as an airtight sludge. This results in a clean water/compound mixture that you can reuse for processing your workpieces. Alongside your centrifuge's annual maintenance as per accident prevention regulations, we also offer you a regular service in line with legal requirements.
Centrifuges cannot be used everywhere. They are not suitable for the following mass finishing applications:
Clean up to 2,000 litres in fully automatic operation! The PLC-controlled ZA centrifuge features a modular design, and can be ideally adjusted to your requirements.
THE BENEFITS AT A GLANCEWith its intuitive control and robust construction, the ZM basket centrifuge can help you clean up to 1,000 litres of process water per hour. The sludge basket is emptied manually.
THE BENEFITS AT A GLANCEAfter mass finishing, the process water contains solid and harmful substances such as oils, metals and greases. To ensure that these substances do not flow into the sewer system, you can clean your acid or alkaline process water in our flocculant units. You can then discharge the clean water into the sewer system in line with legal requirements.
The complete solution for larger mass finishing systems. The PLC-controlled GA or DO systems automatically clean your process water, processing up to 2,000 litres per hour.
PROVEN, EXCELLENT PERFORMANCE IN FULLY AUTOMATIC CLEANINGThe PLC-controlled DO and GA flocculant units are fully automatic solutions that can clean up to 2,000 litres of process water per hour. If you need to clean over 3,000 litres of process water every day, these systems are the right choice. Thanks to a variety of monitoring functions and locks, the cleaning process runs reliably and stably with no intervention from the operator. It delivers clear water free of harmful substances for sustainable disposal.
THE BENEFITS AT A GLANCEThe best-value solution for small and medium businesses. Do you clean less than 3,000 litres of process water every day? Then an RT system is ideal for you.
BATCH CLEANING OF SMALL WATER VOLUMESThe RT unit is cost effective and easy to operate. It is the perfect solution if you need to clean water volumes of up to 3,000 litres every day. To do so, stir the flocculation powder into the contaminated water that is collected during the working period. The flocs that form are then filtered off using a filter bag or press. Your contaminated water will then become clean and clear overnight.
THE BENEFITS AT A GLANCEWorkpieces that go through the trowalizing process are usually wet afterwards. Walther Trowal's range of dryers allow you to dry your workpieces using either a heated drying medium or hot air. Choose your dryer depending on what you need, we will be happy to help.
This dryer uses a heated drying medium to spotlessly dry and polish your sensitive workpieces. Suitable for batch and continuous operation.
THE BENEFITS AT A GLANCEThe BF-HL dryer is perfect for drying sensitive workpieces that cannot be touched. It uses hot air to dry the parts on a wire mesh belt, whilst keeping energy consumption low.
CONTACTLESS DRYING BY MEANS OF HOT AIRThe BF-HL belt dryer allows you to dry your workpieces using hot air. This procedure is particularly beneficial when your workpieces have the following characteristics:
Your workpieces are transported through a heated drying tunnel on a fine wire mesh belt, which is also available in premium V4A stainless steel. The temperature and speed of the conveyor belt are both fully adjustable. Special equipment includes a high-pressure air knife, which blows the residual water out of the workpieces prior to drying, as well as an extension of the conveyor belt to make placing and removing the workpieces easier.
THE BENEFITS AT A GLANCETo clean your components of dirt and grease, simply add them to the work bowl filled with cleaning media. The detergent and water are constantly added. The pressure from the cleaning media and the circulation of the cleaning emulsion remove even large dirt particles. The components are cleaned within 20 to 40 minutes. Dirt and grease are conveyed out of the machine via a screening device with outlet at the bottom of the bowl.
WHICH WORKPIECES CAN BE CLEANED?You can use the TRT 83 x 37 cleaning trough to effortlessly clean workpieces measuring up to 80 cm in length and 30 cm in diameter. Here are some examples:
Thorough cleaning for mechanical engineering, industry, automotive engineering and more. Free your important components of grease, lubricants and other residues, and have them ready for reinstallation in no time.
SGK CLEANING AGENT PROTECTS AGAINST CORROSIONThe trowal SGK liquid cleaning agent allows you to remove grease and other stubborn stains, whilst also protecting your components against corrosion. Unlike solvent-based cold cleaners, SGK is not categorised as a hazardous substance, and can therefore be used for cleaning and pre-treating surfaces for coating.
THE BENEFITS AT A GLANCEFrom ceramic and plastic abrasive media to polishing media, compounds and special media, the right combination can help give your workpiece the perfect surface. We offer a wide range of process media for special processes in all kinds of applications. From rough finishing, polishing and refining to creating surfaces ready for electroplating, we can create the ideal process for you.
Workpiece handling, separation and safety: these are just some of the areas in which our accessories can augment your machines. These allow you to adjust your circular and trough vibrators, continuous units and other processing systems to improve your processes.
Is the integrated screening unit not enough? Then why not separate your workpieces from the abrasive media using magnetic separators or external screening units?
THE BENEFITS AT A GLANCEFrom loading and unloading to transport and buffering, Walther Trowal offers a range of accessories tailored to your needs to ensure quick and smooth handling of your mass finishing processes.
THE BENEFITS AT A GLANCEOur sound deadening covers, cabins and protective fences help offer protection against noise emissions and moving parts.
THE BENEFITS AT A GLANCEWe produce efficient cutlery cleaning units and process media to help you get spotless cutlery, even when dealing with large quantities and stubborn, dried-on stains.
We have developed a new process for cleaning cutlery and kitchen accessories for large kitchens or catering services, based on mass finishing. The Hydromechanical Three-Stage process helps you clean, dry and polish large quantities of cutlery in just a single work step. It can even remove stubborn dried-on stains, rust or pitting fully automatically with stunning results. We can also supply the necessary consumables such as detergent, drying medium and polishing media.
Our cutlery cleaning units let you clean 1,250 to 5,000 items of cutlery per hour quickly, thoroughly and efficiently. Ideal for non-food caterers and tabletop leasing companies.
Our cutlery cleaning units clean, rinse, disinfect, dry and polish your cutlery in a single work step. All items, from teaspoons to soup ladles, are washed and ready for the next service in a single, highly efficient process that requires little input from staff.
1,250 TO 5,000 ITEMS PER HOURThat is how fast our units can clean your cutlery. The BRA 900 can clean 1,250 items of cutlery per hour, while the BRA 2500 cleans up to 5,000 items. This makes them perfect for cleaning large amounts of dirty cutlery. The items leave the machine dry and spotlessly clean, ready for the next service:
THE BENEFITS AT A GLANCE
Whether you need detergent, drying granules or polishing media, we can supply you with all the consumables required to ensure spotlessly clean cutlery. We produce all consumables ourselves so that we can guarantee Walther Trowal quality.
BPS polishing media free your cutlery of stains, rust and scratches, whilst polishing it to a high gloss.
BPS POLISHING MEDIA – IDEAL FOR YOUR CUTLERYCeramic polishing media are especially well suited for cleaning cutlery, as they can reach all areas of the items without becoming jammed in forks, etc. BPS polishing media have exactly these properties. Their size and mineral composition are ideal for effective cleaning with low wear. The longer the process duration, the greater the polishing effect.
THE BENEFITS AT A GLANCEThis low-dust drying granulate is made from corncob shot, and helps ensure spotless, reliable drying after your cutlery has been rinsed.
A SMART DEVELOPMENT IN EVERY DETAILThis premium drying granulate is made from specially treated corncob shot. Thanks to a special screening and monitoring process, it has low dust levels and consists of precisely defined granule sizes. This means you no longer need to worry about residues and clinging granulate.
PRACTICAL PACKAGING, SAFE STORAGEThe drying granulate is delivered in practical 18-kg containers that are the perfect size for filling cutlery dryers. The containers are resealable and protect the granules against moisture and mechanical influences when in storage.
THE BENEFITS AT A GLANCEUse this special cleaner to thoroughly clean your cutlery with no residues. It is best suited for use at low water temperatures around 30 °C.
GENTLE CUTLERY CLEANING AT LOW WATER TEMPERATURESThis special detergent offers powerful cleaning even in cold mains water, with the ideal temperature around 30°C. This means that in addition to perfectly cleaned cutlery, you can also cut costs, as there is no need to heat or specially treat the water.
THE BENEFITS AT A GLANCE