Getting a ‘Gripple’ on green maintenance

Sheffield is renowned for the way it has shaped British industry over the past 300 years. While the mines and foundries may no longer be the driving economic force they once were, one manufacturer – Gripple – has set-up shop in the city and generated a fixings empire reaching as far as Australia.

Gripple was founded by former wire salesman, Hugh Facey, in the 1980s after discussing the woes of connecting fencing with a frustrated farmer on a Welsh hillside. Setting his mind to finding an easier, safer and more efficient way of joining two wires together, the concept for the first Gripple wire fastener was born.
Fast forward 30 years and Gripple now has three sites in Sheffield, and sells products to agriculture, viticulture and construction markets around
the world.
“We’ve now manufactured over 500 million Gripple fasteners, all using production equipment we have designed and manufactured ourselves in house,” begins Tim Barker, engineering site leader for Gripple’s Old West Gun Works site. “This is no mean feat, and to keep pace with demand, we employ a robust planned maintenance strategy for all of our production equipment, to ensure it is able to maintain its maximum operational capacity.”

Parts washing forms a fundamental part of the company’s maintenance plans. Yet, up until four years ago, like many manufacturers and machine shops up and down the country, Barker and his team relied on hydrocarbon-based solvents and aerosol cans to clean and degrease the parts. This meant the team was exposed to some quite harmful cleaning products, simply because that was the only real way of getting the job done.
“Sustainability is a massive part of the Gripple ethos, and where possible we look to keep our impact on the environment to an absolute minimum,” says Barker. “For example, one of our sites is located next to the River Don, which has undergone massive ecological regeneration in recent years. It used to be a dead river 25 years ago, but now there are guys fly-fishing there; the kingfishers are back and it’s an abundance of life, and that’s how it should stay. As such, we have to be extremely careful when it comes to waste removal, and it was one of the key drivers for revaluating our parts washing processes four years ago.”
With a view to eliminating any potentially environmentally-harmful chemicals from its parts washing processes, Barker and the Gripple team turned to Safe Solvents in 2015. Following an initial trial of the company’s Typhoon parts-washing system, he quickly realised the huge impact it could have; not only in improving the company’s environmental credentials, but in eliminating maintenance technicians’ exposure to the health and safety risks often associated with hydrocarbon-based cleaning solvents.

“When we first brought Safe Solvents in, I so impressed by the system – how easy it was to operate, and how switched-on the guys were – that I immediately rolled it out across the other sites,” says Barker. “The Typhoon system means all parts washing is done in a controlled, safe and environmentally-friendly way, rather than just sticking parts in a bowl or sink and using aerosol-propelled solvents.”
The Typhoon system is a modern take on an old sink-on-drum manual parts-washing machine. It provides a trio of cleaning options: tap, flow-through cleaning brush, and soaking tank, as well as trays and working areas to scrub or soak both small and large components. What really sets the offering apart from other solutions however, is the cleaning fluid.
Safe Solvent’s Advanced Parts Wash Fluid (APWF) is a water-based degreaser for general parts. Comparable with standard hydrocarbon-based solvents, it gets to work quickly on cutting through grime and includes a built-in rust inhibitor which acts as a protective barrier for most metals. Crucially, the degreaser works at ambient temperature, meaning there is no need to heat the fluid during the wash process; and it is both non-flammable and non-carcinogenic.
Says Barker: “Compared to the traditional methods we used in the past, making the switch to a modern, greener and safer cleaning solution was a no-brainer. You really can’t compare the cost, there’s a massive saving compared with aerosol-based solvents. Also, the health and safety impact is huge. In the past, all the propellants we used came with a huge stack of COSHH listings, whereas the Typhoon system is the polar opposite.
“The rust inhibitors are great from a maintenance perspective, too,” he continues. “They help prevent oxidisation forming on the surface of materials, as if a part is not fully clean it can be quite difficult to spot a surface defect or fault which could in turn impact production once that part is refitted within a machine.”
As well as helping to de-risk Gripple’s maintenance programmes, up to 80% of Safe Solvent’s cleaning fluid can be recycled as a traffic film remover.

“Once we’ve used the fluid and it’s been recycled, any excess is offered to the team to be used as a cleaning product for their own garages at home,” explains Barker. “It’s great for cleaning car alloys. From my perspective, it’s fantastic to be able to recycle the fluid, but I’m also confident in the knowledge that I’m not sending anything out there that is harmful to the environment.”
He concludes: “Ultimately, making the switch to Safe Solvents’ parts-washing system has been a huge tick in our environmental box. I know that any fluid spillages are safe and will do no damage to our employees or the environment. They’re a company I want to grow with us, so that when we introduce new ways of manufacturing parts, they can help us do so in a safer, easier and ultimately better way.”
For further information www.safesolvents.co.uk

Training award winners named

A budding engineer from Birmingham has secured the main prize at this year’s In-Comm Training Awards after helping his firm secure a game-changing contract.

Adam Burgoyne, who is a new product engineer at metal pressings and stamping specialist Brandauer, was named as the ‘Outstanding Apprentice of the Year’ after earlier picking up the title of ‘Learner of the Year for Engineering & Manufacturing Technologies’.
The double-haul marks the 21-year-old’s impressive development and his role in helping to identify the measurement equipment required to secure the company’s first-ever pharma contract for the Middle East, a project that could be worth in excess of £1m annually. He was joined on stage by colleague James Arnold, who impressed judges with his maturity and determination to drive sales at sister business CB Cable Clips to take the ‘Learner of the Year – Business Support Award’.
For further information www.in-comm.co.uk

Schunk set to invest €85m

Schunk is preparing for the next step of its global growth, with around €85m set to be invested at locations in Brackenheim-Hausen, Mengen and St Georgen in Germany, along with Morrisville in the US, by mid-2020.

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The move will create around 42,000 sq m of additional production and administration space. The process started with the US plant in North Carolina, where the new buildings were officially handed over a few weeks ago. As well as expanding the production area, Schunk Intec USA created a generous new administrative building that, through its open architecture, encourages and inspires creativity and lateral thinking.
In addition, €40m is being put into the Competence Centre for Gripping Systems in Brackenheim-Hausen, just 5km from Schunk’s headquarters in Lauffen. The expansion will cover an area of 22,000 sq m and represents a doubling of the existing production area. Schunk is also investing another €30m in the Competence Centre for Lathe Chuck Technology and Stationary Workholding in Mengen, in the district of Sigmaringen. Here, 12,000 sq m will be added for production, research and development. Finally, €5m will be invested at the St Georgen site in the Black Forest, where the production area will double with an increase of 4200 sq m.
For further information www.schunk.com

Next-generation tangential shoulder mills

New from Kennametal is the next generation of the company’s Mill 4-12KT tangential shoulder mill, which is designed to produce high-quality surface finishes in nearly all steel and cast-iron applications.

“Our Mill 4-12KT uses 15% lower cutting forces, an important consideration with today’s lighter duty, 40-taper machine tools,” says Tim Marshall, senior global product manager. “That allows customers to feed faster without putting additional stress on the spindle. And in long overhang situations, or where the part fixture is less than optimal, lower forces equate to less chatter, reduced edge chipping and smoother surface finishes.”
The tangentially mounted inserts with four cutting edges per insert deliver reduced tooling costs. Seven corner radii from 0.4 to 3.1 mm are available, as well as medium and coarse pitch cutter bodies from 50 to 200 mm in diameter (with through-coolant). Offering an axial depth of cut range from 0.5 to 12 mm, the tool covers most shoulder milling applications.
A number of factors contribute to significant performance increases, even in aggressive cutting conditions. For instance, the tangential ‘on-edge’ insert design allows the insert to take advantage of the strength of the carbide thickness, more so than radially mounted inserts found on traditional milling cutters. In addition, a shallow pocket design permits the core size
of the cutter body to be sufficiently robust.
For further information www.kennametal.com

Vibration-damping system boosts surface finish

For those looking to reduce or prevent vibrations that occur during machining, Mapal has developed a special damping system that is located in the main shank of the tool.

The system is said to provide advantages such as improved surface finish, better accuracy, reduced machining noise and extended tool life.
Cutting tools for boring and milling with very long projection lengths tend to vibrate due to insufficient dynamic rigidity. When designing new tool-holding systems, Mapal product developers took into account all factors arising from the interaction of the machine tool, the cutting tool, the type of clamping and the part. The result is a system for vibration damping that is matched to the stiffness of all common machine types, and can be used for cutting different types of materials with a variety of tools.
Mapal’s self-contained system of auxiliary mass and several steel spring packages, counteracts and minimises tool-body deflection. Vibration in the system can be up to 1,000 times lower compared with tools that are not supported by the absorber system, which helps to improve surface finish. When milling case hardened steel (16MnCr5) with a 250 mm long combination of arbor and cutter with ISO indexable inserts (50 mm diameter) featuring five edges, the Rz value was halved from 7.8 to 3.9 µm (3 mm depth of cut) compared with the same tool system minus vibration damping.
Mill arbors with vibration damping in the shank are available from Mapal with internal coolant supply for clamping diameters of 16, 22 and 27 mm, with a length of 200 or 300 mm. At present, these tool-holding adaptors are available for SK40, SK50, HSK-A63 and HSK-A100 connections.
For further information www.mapal.com