Knoll Maschinenbau GmbG

Archiv for: Food and Beverages

The MX sweetens baked goods in the machines of Bakon Food

L1169819In the enrobing machine of Bakon Food Equipment, the MX-20-R progressing cavity pump of KNOLL Maschinenbau ensures reliable pumping of sensitive media such as chocolate and fondant. Worldwide many customers in the baked goods industry use machines from Bakon Food Equipment (headquartered in Goes, Holland) to spray or coat cakes, pralines and sweets, to glaze, plate, and cut them. Bakon’s product offerings also include complete systems, such as the “cake line”, which can plate, glaze, and cut both round and square cakes at one go.
Bakon uses the progressing cavity pump MX of KNOLL Maschinenbau to pump fondant and chocolate in a liquid state for many years. To hold the product at a constant temperature, KNOLL applies a MX 20-R-40/10 with double jacket for heating the pump unit. The main advantages of the MX are its gentle pumping characteristics of abrasive media. The feeding screw in the hopper housing supports a continuously pumping of chocolate and fondant with low pulsation.L1160100
The many advantages of the EvenWall®-technology of the stator offer the customer e.g. a high pressure stability, long lifetime and a production by low consumption. Similarly, the compact assembly length makes concessions to the small space in the enrobing machine of Bakon and enables an easy integration of the pump into the system of the machine. Get more information about the use of the MX in the baked goods industry and visit us at the IBA in Munich, from 12. – 17. September 2015 in hall A5, booth 311 – we look forward to your visit!

The KNOLL “sugar worm” – the MX progressing cavity pump in action in the confectionary industry

sweetsConfectionary – who can resist the sweet temptation? On average, Germans eat 32 kg of sweets in a variety of forms every year. Hard candies are particularly popular, coming as they do in many different flavours.

The MX by KNOLL Maschinenbau is ideal for producing this well-loved confectionary. Hanover-based Hänsel Processing GmbH, a respected plant and systems supplier in the confectionary industry, has been happily using the MX progressing cavity pump for a number of years now.

Crucial factors for the customer are the hygienic design of the MX and its excellent cleanability. As with many plant constructors, the MX scores highly for its compact overall length which allows the pump to be integrated into the overall system in a space-saving way. The high dosing accuracy of the MX enables Hänsel Processing to fill exactly portioned batches of hard candy mass.

For this application, KNOLL uses a heated stainless steel double jacket for the MX as standard. This allows media such as toffee, fondant or jelly mass to be kept at a constant temperature and, thus, to be conveyed easily and gently. The uniform elastomer wall thickness of the EvenWall® stator provides good, even heat transfer between the double jacket and the medium. The uniform thermal expansion of the stator elastomer has a very positive effect on its useful life and, thus, on the productivity of the overall system.

Do you also work in the confectionary industry, and have we managed to arouse your interest in our “sugar worm”?
If so, please give us a call. It’s a safe bet that you’ll find a suitable KNOLL MX solution for your application in our product range.


Efficient antipasti production using KNOLL progressing cavity pumps

Progressing cavity pumps from KNOLL Maschinenbauare used world-wide in various sectors. In addition to being used for processing paints and lacquers, chemical or pharmaceutical products, they are the pumps of choice in the foodstuffs industry in particular. The versatile MX can be used in many processes, for example as a dosing pump or transfer pump or for the plastification of media. KNOLL has developed the MX plastifier version specially for plastifying highly viscous to compacted media – an application in which it offers a number of advantages.

A german manufacturer of antipasti products has greatly simplified its production process by using the MX P version. The filling of olives, peppers and chilies with fresh cheese was a very complex and time-consuming process before the introduction of the MX. Each individual husk had to be filled manually using a pressure system.
Used in combination with the dosing system from a south German plant manufacturer, the MX50P-80/10 allows olives, peppers and chilies to be filled fully automatically – all in a single operation. 100 fillings are possible per dosing cycle.

The hard fresh cheese, which is stored in 10 kg buckets and cooled to 6°C, is collected by the pump from the large top-mounted hopper and plasticized to a viscid product with the aid of the feed screw and a special hopper geometry. Stuffing of the fresh cheese products is achieved by co-ordinated operation of the feed screw and pump assembly. This allows air to escape upstream of the pump assembly, preventing air from being trapped in the fresh cheese.

This efficient system has been in operation for several years now and has simplified and improved the working process for the producer.

Pumping pumpkin mix with the MX

A US company in existence since the 1950’s has specialised in processing fruit and vegetables.
In addition to a wide variety of tinned fruits, they also make the cake filling for pumpkin pie, a favourite dessert among Americans.
“Pumpkin Pie” is a traditional US dessert, traditionally served from late autumn to early winter, and especially on public holidays such as on Halloween and Thanksgiving.

The pumpkin harvest takes place in the autumn.Processing of the pumpkin harvest takes from October until December, a phase described by the producers as the “pumpkin drive”. 
The customer previously used a rotary piston pump manufactured by a well-known US manufacturer for the further processing of pumpkins.
Even though the pumpkins were shredded, boiled and thoroughly cleaned prior to processing, tiny particles of sand still cling to their skins. The abrasive properties of the sand grains make pumping very difficult for the radial piston pump.
Since both the housing and the piston in these pumps are metallic, the sand particles act like sandpaper on the metallic components of the pump and wear out the inner workings of the radial piston pump within just 72 hours.
During the so-called drive, manufacturers of pumpkin cream incur enormous costs due to the high rate of wear and tear on the radial piston pumps. To reduce these costs, a KNOLL progressing cavity pump is now being used in place of the radial piston pump.

KNOLL uses a standard type MX30S-60/10 pump for this application.
Thanks to MX EvenWall® Technology, which provides exact and even pressure between the ductile coated stainless steel rotor and the soft elastomer of the stator, the MX offers many advantages in this field of application.
The closed pressure chambers of the KNOLL pump prevent medium from flowing back into the lower-pressure chamber (eliminating jet abrasion). This has two advantages: firstly, it allows very high operating pressures to be used and, secondly, the abrasive particles effectively have no chance of damaging the pump surfaces. It also allows the pump to be better primed with up to 100 mbar of absolute vacuum.
A further advantage of a KNOLL progressing cavity pump is that it is easy to clean.
A MX can also be operated filled with water, thus enabling the pump to clean itself. This also allows the remaining pumpkin mix to be pushed out of the pipes in order to clean the pump system and piping. This means that the MX is capable of achieving the same high pressures with water as with high-viscosity media. During cleaning, it is important that RPM can be regulated. Using the MX, pump speed can be regulated in stages from 1 to 20 as standard.

A radial piston pump, on the other hand, can only build up a low pressure when running at low RPM and using low-viscosity media. Backflow into the preceding pressure chamber cannot be prevented because the pressure chambers are not closed. A “buster pump” is needed for cleaning because a radial piston pump cannot clean itself or the piping.

The KNOLL progressing cavity pump was used for the first time midway through a pumpkin drive. At the close of the pumpkin season, the pump was examined at our factory. It had been in use for approx. 1-2 months and exhibited minimal sign of wear and tear.
The KNOLL pump has now been in use for 2.5 pumpkin drives. For the producers of the pumpkin cream, the extended life of the pump is a major boon as it cuts costs significantly and allows many processes to be simplified.

Reducing, pumping and plasticizing blocks of cheese with the KNOLL MX

A cheese dairy from the Netherlands has been making a variety of finest-quality cheese products since the early 19th century, and has meanwhile made a name for itself as the leading Dutch brand world-wide.

A solution for reducing, pumping and plasticizing young to medium-aged cheeses has been found by using the KNOLL type MX50R-60/30 progressing cavity pump in combination with a frozen block cutter.

The firm to very hard blocks of cheese, which weigh as much as 30 kg, are reduced to a pumpable size of 25 x 35 x 20 mm by the reducer and conveyed through a feed hopper adapted to match the frozen block cutter outlet, and directly into the MX pump system.

The feed screw on the feed hopper pump has a special non-stick coating which prevents cheese from sticking to the feed screw and so provides for a smoother conveying process.

This coating has other advantages too, as it allows the feed screw to be cleaned more quickly and easily.

Plasticizer plates built into the discharge nozzle or at the end of the pressure line shape the cheese into narrow strips, thus speeding up and simplifying subsequent processing. The Even Wall® geometry is a key factor here because it allows pressures of up to 80 bar to be used.

Pumping frozen fruits with the feed hopper version of the MX30

Austrian foodstuffs manufacturer Agrana is the European market leader in the field of biological fruit preparations. Here, research and development play a key role, both at product level and in the production processes themselves.

The MX by KNOLL Maschinenbau was used on a trial basis as part of a new fruit processing concept and produced an impressive all-round performance. The task was to collect and convey various fruit varieties in a still frozen state.

A heated MX30R-60/10  was used for the test setup. Its trough-like shape prevents build-up from occurring on the hopper walls while the tapered worm conveyor ensures optimal product removal from the hopper floor. The CIP-compatible axial face seal with torque transfer element facing away from the product allows easy cleaning while intelligent joints make for fast dismantling. By way of an option, an additional extension hopper can be adapted.

The tests at Agrana showed that the MX provides reliable transportation of various fruit media from starting temperatures as low as – 18 degrees (Celsius). It was able to feed the partially still deep frozen fruits directly into the pump. The media were, as planned, reduced by the MX in a controlled way while being conveyed.

The case study shows that the feed hopper pump version of the MX eccentric screw pump is able to effectively support innovative production processes in the foodstuffs industry. The MX is a good choice when it comes to implementing new formulations or new production methods in a way that maximises sustainability and efficiency while ensuring the gentle processing of natural base products.

KNOLL at the PROCESS EXPO in Chicago

From November the 1st until 4th 2011 the exhibition PROCESS EXPO takes place in Chicago, Illinois. KNOLL exhibits in the North Hall, booth 848 – you are invited to visit us at our booth.

PROCESS EXPO is the premier worldwide trade show for leaders in the food and beverage industriy. At this fair, all is about sanitary installations.

 KNOLL will present the new developed double spindle pump DSP as well as the different MX-pump sizes. Of course, all important special versions of MX are shown: the hopper version and the submerged version.(to unload drums)

We are looking forward to your visit.

Interpack Trade Show: What KNOLL will exhibit

From 12 to 18 May 2011 interpack trade show will be held in Duesseldorf (Germany). KNOLL Maschinenbau will be participating, our booth can be found in hall 4, stand 4E05. You are cordially invited to visit our booth. Pumps from KNOLL do fit very well to the “world’s most important trade fair for the packaging sector“, as it adresses also all things processing.

The wider focus on processing issues is of interest for companies in the food and beverage, pharmaceuticals and cosmetics. It offers a holistic view on the process chain featuring all aspects on processing, metering and finally packaging.

KNOLL Maschinenbau will introduce its new double spindle pump DSP. In addition, the pumps of the MX-series will be shown, including a new feature on the drives: a MX10 with stainless steel drive. Of course, all important models of the MX will be presented, too. Among them a version with double jacket for temperature control, a hopper version and of course a submerged version (for tank drainage).

All in all it may be worthwhile to stop by at KNOLL Maschinenbau in hall 4. You are very welcome and we look forward to meet you at interpack in Duesseldorf!

Pumps for Waste in Food and Beverage

Producing food or beverages implies the handling of waste. Of course waste must be routed quickly and safely to external disposal or rework purposes. As an alternative to conveyor belts or compressed air as means of transportation the progressing cavity pump from KNOLL Maschinenbau can be used, too.

This pump can be used even if the medium is relatively dry. A Spanish producer of fruit juices was looking for a solution that could help him to transport the peel of citrus fruits. The MX from KNOLL Maschinenbau as a hopper version was exactly what he was looking for: Service life got considerably longer compared to an earlier setting with a different pump.

A particular challenge was the fact that the pipeline from the hall into the open is very long. The pump therefore has to provide sufficient pressure  in order to transport  the peel (mostly from pressed oranges and lemons). In this case a MX50R-60/30 with large hopper and corresponding feeeding screw is used. This pump coveys 5 t / h at a back pressure of up to 25 bars.

It is fully made in stainless steel with FPM elastomers and a universal joint which is provided with a sanitary seal. Its conical feeding screw empties the hopper efficiently. The trough shape prevents deposits on the hopper walls. In the pumping tunnel an overfeed ensures the optimal filling of the chambers in the pump assembly. Of course the MX in this version is fast and easy to clean, as any other version of this series.

The Spanish beverage company is very pleased with this pump and confirmes, after several years of use, that KNOLL Maschinenbau had not promised too much. Also, the projected maintenance interval of 5 years in this sense is not an empty promise.

Cleaning Pumps Inside and Outside

Pumps need to be cleaned easily. But in most cases attention is paid only  to the interior of the pump while the pump housing and the drive get much less attention. In the American Food Industry there is an ever increasing demand on general hygiene that is being extended to the exterior of the pumps. It is now as important for the exterior of the pump to  be cleaned as easily as the interior.

Because of this requirement, pumps must be cleanable with high pressure cleaners. For instance, pumps cannot have painted parts that would discourage high pressure washing. This requires smooth outer contours without dead spaces, so that no dirt traps or residues of cleaning fluids occur. In addition the atmosphere side surfaces of the pump need to be corrosion resistant to aggressive cleaning agents.

KNOLL Maschinenbau can meet all of these requirements with its MX progressing cavity pump: The MX is designed completely in stainless steel, which also applies to the stator jacket and the drive. There are no covers on the drive. Covers normally accumulate a lot of dirt and are unsuitable for very hygiene-sensitive work environments. As a drive in stainless steel, gear, servo and stepper motors are offered, so that a wide range of use cases can be covered.

In addition, the MX from KNOLL Maschinenbau maintains the highest degree of internal sanitary standards (CIP and SIP) – like in the standard model. As a consequence this progressive cavity pump is ready not only for food industry, but may as well assist in pharmacy, biochemistry and cosmetics in order to meet highest hygiene requirements.