Bunting Provide Technical Support at Two Overseas Shows
Local representative Tekemashas exhibited at two Autumn international trade shows in 2018. The equipment displayed on their stands included a selection of Magnetic Separators. Both exhibitions proved to be successful, with leads for both magnetic separation and metal detection equipment.
Tekemas is based in Rodovre, Denmark and specialises in providing solutions in the handling and processing of powders and granules. They represent a number of international equipment and technology suppliers including Wysetech Materials Handling and Matcon.
Scanpack (Gothenburg, Sweden, 23-26 October 2018)
Scanpack is an international event for the packaging industry. Exhibitors showcase solutions for the entire packaging process. Visitors included managers, marketers, brand managers and others involved in packaging, from conception and design, through to production and logistics. Representatives from companies based in over 40 countries attend the show.
Bunting’s Sales Engineer, Tom Higginbottom, attended the show.
“Overseas exhibitions provide an ideal opportunity to learn about the local markets,” Tom explained. “The time I spent with the Tekemas team has been precious. I was able to provide support with technical information and, potentially more importantly, develop my relationship with the Tekemas engineers.”
FoodTech (Herning, Denmark, 13-15 November 2018)
FoodTechis a food technology event, held every two years in MCH Messecenter Herning. The exhibition is focused on showcasing the latest technology for the food manufacturing and processing sectors.
Tekemas were supported by Bunting’s Head of Sales, Dave Hills.
“Before I had even left the United Kingdom, Tekemas had arranged meetings on the stand with prospective customers,” said Dave. “Supporting our local representatives at shows like this is so important. The time can be used for product and application training as well as developing all-important relationships. It has been a very successful show.”
Bunting and Master Magnets are continually searching for new overseas representatives in a wide range of industrial sectors. For further information, contact Dave Hills on email@example.com.
For further information on Magnetic Separators or Metal Detectors used in removing and detecting metal contamination in food, please visit our website or contact us on:
A Magnetic Separator is designed to attract, capture and hold magnetic particles. The magnetic strength needed to successfully achieve that design objective is commonly stated in a magnetic separator supplier’s quotation or specified in the tender. This ‘Magnetic Strength’ is usually referenced in terms of ‘gauss’, a unit of measurement. However, the ‘gauss’ value can be very difficult to accurately measure.
There is a more practical method of assessing the magnetic strength. This removes any ambiguity whilst providing simple, repeatable, and comparable data to assess most Magnetic Separators.
Measuring Magnetic Strength
The magnetic strength of a Magnetic Separator is often referenced in terms of ‘gauss’. Gauss(symbolized G) is the centimetre-gram-second (cgs) unit of magnetic flux density. A flux density of 1 G represents one maxwell per centimetre squared (1 Mx cm -2 ). It is named after the German scientist Carl Friedrich Gauss.
Gauss can be measured using a Gaussmeter. However, it is important to note that the Gauss rating on its own does not fully indicate the strength of a magnet. Additionally, gaussmeters can give a range of readings dependent upon the orientation of the probe and several other variable parameters.
Proposals for Tube Magnets often include details of length, diameter and the gauss reading. With the gauss reading being so difficult to test and prove, purchasers and users are unable to check that the Tube Magnets supplied actually meet the specification of the quote and the order.
However, in terms of Magnetic Separation the objective for the user is simple; the magnetic force must enable the attraction and capture of any magnetically susceptible metal. That ability can be measured as a function of the effort needed to remove a specific steel item from the surface.
Measuring the effort needed to remove a steel item from the face or surface of a Magnetic Separator is achieved using a spring balance and is commonly called a ‘Pull Test’. The magnetic test piece (e.g. a 6mm ball bearing welded onto a non-magnetic attachment ring) is clipped onto the end of the spring balance.
The magnetic test piece is placed on the surface of the Magnetic Separator and force applied at the other end of the spring balance until it is detached. The force required to remove the magnetic test piece (measured in kgs) is recorded on the measurement scale of the spring balance.
Measurements are taken in the centre of the Tube Magnet and on the end poles. They are repeated three times and the average recorded as the force required to remove the magnetic test piece at each point.
The following video explains the Pull Test technique.
This simple but effective method does not record or provide any indication of the gauss, but accurately provides data that can be used to compare the condition of a Magnetic Separator over time and compare the performance with other similar designs.
Pull Test Experiments
Magnetic Separator designs vary considerably depending on the application. The Pull Test technique is suitable for measuring the magnetic strength of smaller Magnetic Separators such as Tube or Cartridge Magnets and Plate Magnets.
Tube or Cartridge Magnets are often used stand alone or as part of a Magnetic Separator configuration (e.g. Drawer Filter or Liquid Trap).
A small steel ball is used as the magnetic test piece when measuring the magnetic strength of a Tube or Cartridge Magnet (the photograph shows a 6mm diameter ball)
The metal test piece is attached to the end of the Spring Balance and then placed into the magnetic field, being attracted to the magnetic pole.
In a series of experiments, we used the Pull Test technique to assess the magnetic strength of Tube Magnets with Ceramic (Ferrite), Standard Neodymium Rare Earth, and High Strength Neodymium Rare Earth Magnets.
The tests were undertaken using three different sizes of steel ball in the magnetic test piece (6mm, 12mm and 25mm) and introduced non-magnetic spacer to assess the magnetic strength at specific distances away from the surface (3mm and 6mm). All the recorded measurements are in kilograms (kg)
Note: all measurements are recorded in kilogrammes.
Standard Neodymium Rare Earth
Note: all measurements are recorded in kilogrammes.
High Strength Neodymium Rare Earth
Note: all measurements are recorded in kilogrammes.
In all cases, the drop off in magnetic strength as you move away from the surface of the Tube Magnet is significant and this highlights the need for metal contamination to come into contact with the surface. Arrangements where the Tube Magnets are configured as a Grate (i.e. are lined up and equally spaced) commonly have a deflector above the gap between the Tubes that directs material in the area of maximum magnetic strength.
The tests highlight the difference in magnetic strength on the surface, with high strength Rare Earth magnets producing nearly 3 times as much pull as Ceramic magnets.
Findings During Magnetic Separator Audits
Magnetic Separator Audits often highlight issues that had previously gone undetected. The first check focuses on the physical integrity of the Magnetic Separator, inspecting welds, and assessing wear and damage. Once these have been completed, the measurements are taken.
The most common findings when undertaking magnetic separator audits are:
Magnetic Liquid Filters, fitted into pipelines, have Tube Magnets that are welded to a lid and project down into the product flow. Metal is attracted and captured on the surface of the Tube Magnet.
In cases where the welds have failed (e.g. poor manufacture, eaten away by acidic or alkaline liquids), liquid will seep into the tube and onto the magnets. The magnets then swell and lose magnetic strength, ultimately splitting the outer stainless-steel casing.
Tube Magnet Wear
When material falls directly onto the surface of a Tube Magnet, over time the surface can be worn. Wear usually occurs on the poles where magnetic particles have been captured. Once the outer stainless-steel casing has been breached, the Tube Magnet should be replaced.
Weak Tube Magnets
Magnetic separation audits highlight the variance in magnetic strength of Tube Magnets. Often, the Tube Magnets have been installed for some time and details of the original specification have been lost. When testing the magnetic strength, some Tube Magnets are found to have very poor strength and provide little if no metal separation protection. This is of great concern when the Tube Magnet is positioned to protect a particular item of processing plant where metal contamination damage could result in production downtime and costly repairs.
The Pull Test Experiments highlights the importance of physically checking the real magnetic strength of a Tube Magnet and not only replying on the stated gauss. Including details of the force needed to detach a 6mm steel ball from the surface of the Tube Magnet in the request for quotation and the order, protects the user and ensures that the supplied equipment is as exactly as stated.
This ‘Pull Test’ measurement technique also enables a regular comparative test that will immediately highlight any drop in magnetic strength. This can be used in annual audits or inspections as part of a plant’s quality management system. A change in ‘pull’ strength may be the result of physical (e.g. failed weld, broken magnets from being dropped) or excessive heat. The reduced magnetic force may result in the magnetic separator no longer being fit for purpose.
For further information on measuring the strength of a Magnetic Separator, please visit our website or contact us on:
Addo Food Group manufacture the chilled pastry products as own-branded products for major UK supermarkets Tesco, Aldi and Nisa, as well as those produced under the Walls and Millers brands. The extent of the recall is substantial, with 59 products being recalled.
Metal can enter the food production process at a number of stages:
Metal can be present in the foodstuffs being delivered. To prevent such an introduction of metal into the process, many food processors pass the in-feed material over Magnetic Separators and through Metal Detectors;
Processing equipment wear and failure (e.g. screen break, pump collapse, etc) can cause metal to enter the process stream;
Accidental introduction by people on site;
However, with the right combination of metal separation and detection equipment, such metal can be found and removed before any finished product leaves the production facility.
How To Prevent Metal Contamination
The vast majority of food processing plants have Magnetic Separators and Metal Detectors installed. Many of these have been in operation for many years which, in some cases, can be decades.
Moved and are positioned in such a way that it is very unlikely to capture any metal contamination;
Cleaned too infrequently, resulting in a substantial build up of captured metal until the magnet face is full and the Magnetic Separator no longer operates;
Purchased and installed without any check of the magnetic strength, which subsequently turns out to the very weak;
Installed many years previously and now provides limited protection due to the poor magnetic strength;
To prevent metal contamination problems, it is advisable to have an annual audit by an external third party. This audit then forms part of the quality and safety management system.
It will be interesting to determine the cause of the latest food recall due to metal contamination, but it will take longer to damage the reputation of the manufacturer Addo Food Group and consumer confidence in the affected products.
For more information on the issue of Metal Contamination and Metal Separation, or to arrange a free onsite survey and audit of a particular plant or process, please contact the Bunting team on:
In 2018, the Bunting and Master Magnets team will be exhibiting at 14 industry shows across Europe.
“This will be our most active year for exhibitions,” said Dave Hills, Bunting’s Head of Sales. “Being visible at exhibitions and congresses in 2016 and 2017 has been really important in building our identity and growing our sales. We want to take our technology to our potential customers and show them what it can do.”
The full exhibition and congress schedule is:
17th International Electronics Recycling Congress IERC2018 (Salzburg, Austria, 17-19 January). The first congress of the year focused on E-waste (see the report – Changes in E Waste Management Highlighted at IERC 2018). There was considerable interest in the Stainless Steel Separator;
IFAT (Munich, Germany, 14-18 May). The largest waste and recycling show in Europe. Bunting now has one of the most complete ranges of Magnetic Separators and Metal Detectors for recycling including the:
CARS (NAEC, Stoneleigh, UK, 11-12 July). The Complete Auto Recycling Show focuses on the recovery, dismantling and recycling of the car. Separating the metals is a vital stage of the process where companies use the Stainless Steel Separator, Eddy Current Separators, and Scrap Drum Magnets;
WasteExpo (Warwickshire Exhibition Centre, near Leamington Spa, UK 5th July). The waste and skip trade exhibition run by Skip Hire Magazine where we are headline sponsors alongside Master Magnets.
RWM (NEC, Birmingham, UK, 12-13 September). The largest waste and recycling exhibition in the UK. Bunting and Master Magnets have been long-term supporters of the show and will have working Magnetic Separators on the stand.
This will be a busy month for overseas exhibitions with events in Italy and France.
Ecomondo (Rimini, Italy, 6-9 November). An international event with an innovative format that brings together all sectors of the circular economy in a single platform: from material and energy recovery to sustainable development. The show is the ideal platform to promote Magnetic Separation equipment used in the recycling sector and we will be supporting our new representative, Ital Goods.;
Emballage (Paris, France, 26-29 November). The international trade show gathers together industry stakeholders from the food, liquids, cosmetics, beauty, luxury goods, healthcare, pharmaceutical, retail and consumer goods sectors, offering them 4 days of meetings, demonstrations, innovation and presentations. We will be on the stand of our local distributor, Pronix. Magnetic Separators and Metal Detectors are used extensively in the processing industries;
Pollutec (Lyon, France, 27-30 November). The international trade show for environmental and energy stakeholders working for economic performance. The final recycling focused event of 2018 and we will be supporting our local distributor BMS France;
Plast Eurasia (Istanbul, Turkey, 5-8 December). The major plastic show for Turkey and the Middle East. Bunting has exhibited previously and will be helping visitors solve their metal contamination problems. As in 2016, we will be on the stand of our local representative Tepro Makine.
“It is an ambitious and exhibiting exhibition schedule for 2018,” explained Dave. “With the Master Magnets product range we are now able to offer total metal separation solutions. Attending leading industry exhibitions is vital to understand the needs of the industry and demonstrate how we can help.”
For further information on any of the listed exhibitions or any aspect of Metal Separation or Detection, please contact us on:
At the same time, the Bunting team was exhibiting at the Arabplast exhibition in Dubai. The plastics focused event was attended and visited by plastics professionals across the region. Sales were even made on the stand!
The UK’s leading plastics show, Interplas, is held every 3 years and, as in previous years, it was very well supported by both exhibitors and visitors. The environmental issues associated with plastic waste was gathering momentum.
We hope you have enjoyed reading our news and blogs in 2017. If there are any topics that you would like reviewed, then please get in touch and send an email to Paul our press officer (firstname.lastname@example.org).
For further information on Magnetic Separators or Metal Detectors please contact the Bunting team on:
Tom Higginbottom Reports Following Attending the SyMas Exhibition
Last week, our Sales Engineer Tom Higginbottom spent 2-days at the SyMas Bulk Solids and Powders exhibition in Krakow, Poland with Bunting’s local representative, TEKPRO. Whilst at the show, he gained an insight into the present state of the market and potential opportunities for UK exporters.
Tom gives us his insight in the show, local feelings about BREXIT, and the market in general
“SyMas was a really good show with a busy footfall. There was a lot of equipment on show, from manufacturers based all over the world.
From the type of enquiries and from talking to clients and our distributor, it is clear that the bulk solids and powders sector is growing. Despite being a member of the EU, Poland remains an emerging nation and wages are still lower than in more developed European countries like the UK, Germany and France, but that gap is closing. Their skill base is very high and consistently improving.
There is a lot of Western European investment and many of the manufacturing facilities are state-of-the-art. This matched with the lower wage cost and workforce skills make the Poles very competitive in both European and global markets.
It was interesting speaking with the Poles about the UK leaving the European Union. Generally, people thought that being a part of the EU makes it possible to compete with larger economies such as China and the USA. Brexit has introduced an unknown factor and there was a feeling that, without the UK, the EU would have less negotiating power on the world stage.
I think that the growth of our local representative TEKPROhighlights the expanding market and potential opportunities in Poland. Since they were founded 10 years ago, they have expanded their workforce from 4 to 84 people. It is an exciting time and we are working closely with them to maximise our sales potential in Poland.
Bunting Support TEKPRO at International Trade Fair for Powder & Bulk Solids Technologies in Krakow, Poland
As part of their export business development strategy, Tom Higginbottom from Bunting will be supporting their Polish distributor TEKPROat SyMas, the powder and bulk solids trade fair in Krakow, Poland (18-19 October 2017).
SyMasis an international exhibition focused on the processing, transport and storage of bulk goods, powders and granules. TEKPRO are on stand A68.
Company TEKPRO Sp. z.o.o. was founded in March 2007 by Danish company TEKEMAS A/S and the Swiss Dietrich Engineering Consultants sa. They specialise in providing individual equipment and complete plants to handle and process bulk materials to the Polish market.
“Attending the exhibition and supporting the TEKPRO team is very important,” explained Bunting’s Sales Engineer Tom Higginbottom. “Being at SyMas allows us to gain an understanding of the market, meeting existing and potential customers, and discussing the industry in general.”
“Over the next 2-days it will be great to have an opportunity to get to know the TEKPRO team. We will also take the opportunity to provide some additional training. We are really looking forward to the show, and spending time in a very beautiful city,” said Tom.
For further information on removing metal contamination from bulk goods, powders and granules with Magnetic Separators and Metal Detectors please visit the TEKPRO stand at SyMas or contact us on: