Archive for: 2011
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.
This article was published on 2011.12.21
Published in Food and Beverages, General |
Tags: cutter, EvenWall, feed screw, Hopper Version, plasticising block goods, Plastification, reducer, special non-stick coating
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KNOLL develops, designs and produces solutions customised to the specifications of its customers. These include one of the world’s leading oil companies, which has successfully been using KNOLL progressing cavity pumps for several years now.
An existing progressing cavity pump was replaced with an MX pump by KNOLL by optimising a production process. With this application, grease is pumped at temperatures in the 100 – 200 °C range and at a viscosity of approx. 10,000 mPas. The process is such that it is possible for clumps of grease to arrive at the pump despite the high temperature and the liquid properties of the medium.
In this case, an MX50R-60/10 with bridge breaker and separate drive was used in order to prevent bridging. Taking account of the medium’s complex properties, the bridge breaker ensures controlled and troublefree delivery of the low-viscosity grease.
The universal joint runs in needle bearings lubricated with heat-resistant lubricants and, thus, is suitable for applications involving temperatures up to 250 °C.
Given the customer’s pre-existing machine set-up, the current pump’s connecting dimensions were adapted to match those of the MX pump, both at the feed hopper flange and at the pressure connection. This enabled Knoll to provide the customer with a more simple and, above all, more efficient refit.
This article was published on 2011.11.14
Published in General, MX Product Features, Oil Industry |
Tags: bridge breaker, bridging, Hopper Version, oil industry
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A well-known Swiss adhesives manufacturer is an important supplier to the international automobile industry of glues for bonding car bodies, windscreens and dashboard kits. Air trapped in the adhesive would allow gaps in the sealing contours, which in turn would result in leakage inside the vehicle due for example to the ingress of rainwater through the windscreen. The adhesive must therefore be absolutely free of trapped air in order to ensure a continuously tight adhesive bead. For this reason, the adhesive is manufactured under vacuum and delivered to automobile manufacturers in vacuum-sealed drums.
For this application, an MX50R-80/20 with an electric heating jacket and dry run protection was placed below a vacuum mixer. The MX is used as a mixer discharge pump and fills the drums with adhesive under vacuum. A vacuum of 20 mbar absolute is maintained in the mixer. In this process, the filling time of the moisture-reactive adhesive including 800 µ filtration is about 4 minutes per drum.
The feed housing and the conveyor worm of the progressing cavity pump MX from KNOLL have a special nanotechnology-based non-stick coating to avoid unwanted bonding effects and bridging. Due to the highly abrasive properties of the medium and high viscosity values ranging from 700,000 – 1,500,000 m Pas, a solid stator made of a specially hardened material is used for this pump. The KNOLL solid stator uses the tried and tested “half-shell system” employed in the production process for the KNOLL screw spindle pumps type KTS.
The pump was tested for vacuum tightness for a week prior to delivery, and it was found that the high vacuum level remained absolutely constant.
In this specific application, our competitors’ pumps achieved a maximum life of only approx. 3 months and showed the first signs of wear after only a few weeks. The MX by KNOLL Maschinenbau GmbH has already been in use for more than a half year and so far has not shown any signs of wear.
This article was published on 2011.10.26
Published in Adhesive, Automotive, General, Pumps |
Tags: Abrasive Media, adhesive, electrical heating, half-shell system, Hopper Version, MX50, solid stator, vacuum
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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.
This article was published on 2011.10.26
Published in Food and Beverages, General, MX Product Features |
Tags: Agrana, frozen media, fruit preparations, fruits, Hopper Version, MX30
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There are applications, e.g. in the chemicals industry or in the paints and lacquers industry, where elastomers cannot be used. Pumps would be susceptible to chemical attack, particularly when using mixtures of different solvents. Therefore, not only the medium itself but also the cleaning process must be taken into consideration when designing the pump.
In this case, a viable alternative would be to use PTFE (Teflon) both in the secondary seals and in the stator. KNOLL Maschinenbau recently assembled an MX20 for a south German paints manufacturer to meet its special requirements of suitability for use in paints production and frequent cleaning with a mixture of solvents. Given that these solvents are recycled, their composition and concentration may change, but this must not alter the properties of the eccentric screw pump.
To this end, the MX20 was fitted with a solid stator made of Teflon. The excentric movement of the rotor is compensated by a titanium torsion bar. No elastomer seals are used. As a result, the MX, first, has the required level of resistance to cleaning with solvents and, second, retains its KNOLL trademark properties:
- High ease of servicing even when using non-standard components;
- Good cleanability (CIP and SIP);
- Excellent pump characteristics (low pulsation, high pressures, suitability for high viscosity levels).
In the case of this special version, attention was also given to preserving the modularity of all key components so that the paints manufacturer can, when necessary, adapt the pump to changing conditions within the manufacturing process.
All in all, this MX20 is a great example of how KNOLL Maschinenbau responds flexibly to its customers’ needs to facilitate their manufacturing processes as best possible.
This article was published on 2011.10.26
Published in General, MX Product Features, Paints and Coatings, Pumps, Uncategorized |
Tags: agressive media, PTFE, resistant, sealings, solid stator, solvents, teflon
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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.
This article was published on 2011.10.11
Published in Food and Beverages, General, Pumps |
Tags: Beverages, double spindle pump, Food, hopper, MX, submerged version
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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!
This article was published on 2011.04.18
Published in Cosmetics, Food and Beverages, Knoll Company, Pharmaceuticals |
Tags: double screw pump, double spindle pump, Hopper Version, interpack, stainless steel drive, submerged version, tempering
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The progressive cavity pump MX50P from KNOLL Maschinenbau is specially designed for plasticizing block goods like butter, fat, margerine, almond paste or rework. Block material of various sizes can be inserted easily because of the pumps special design.
On its integrated folding base block goods can be unpacked at an ergonomic height. A safety switch helps to prevent unintended contacts with moving parts. The hopper is scaled amply so that several blocks can be inserted simultaneously. Heating (oder cooling) with double jacket is available as an option.
The precise interaction between feeding screw and hopper geometry guarantees a secure chamber filling without trapped air pockets. Like with all other progessive cavity pumps from KNOLL the major goal was to correspond to high hygiene standards, followed by ease of service and an outstanding performance.
Optionally the pump outlet can be equiped with plasticising washers in various sizes for different cross sections, for example in the production of puff pastry.
All in all the MX-pump in plastification version provides the best possible support for processing block goods in food industry.
This article was published on 2011.04.11
Published in Food and Beverages, MX Product Features |
Tags: block goods, plasticising block goods, Plastification, Rework
1 comment
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.
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.
This coating has other advantages too, as it allows the feed screw to be cleaned more quickly and easily.
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