Product Details Supplier Info More products

A leader in the global orthopaedics market has eliminated contamination and improved the efficiency of existing blast equipment with the help of Wheelabrator Group.

For over 30 years the company has specialised in the design and manufacture of implants used to replace hips, knees, shoulders and elbows as well as other biomaterials and orthopaedic surgical instruments.

The company approached Wheelabrator Group for advice and assistance with a solution to meet the ever-demanding health and safety requirements of the medical products industry.

Paul Mitchell, equipment sales manager (south) at Wheelabrator Group, said: ‘As long standing customers of Wheelabrator Group, when the time came to upgrade the blast equipment in order to meet latest legislation, this company had no hesitation in approaching us for advice and machine solutions.

‘In particular, it was in search of a solution to contamination caused by excess dust around the working area – a problem complicated by the fact that parts were mainly cobalt chrome, which makes the dust potentially hazardous to machinery operators and end users.’ During consultation, Wheelabrator engineers discovered the contamination problem was being caused by a number of factors.

Over time, the dust collectors had collected dirt and become less effective.

The media was also found to be escaping from the blast cabinet when the door was opened, causing it to circulate in the air and spill onto the floor.

This was partly due to the machine operators prematurely opening the cabinet door before the dust had a chance to settle, and also because the blow off guns that separate the dust from the blasted parts were being used when the blast door was open.

These factors, combined with the blast machine being situated in a relatively confined area, resulted in potentially hazardous conditions for the machine operators and raised significant health and safety concerns for the organisation.

‘By introducing new technologies, as well as upgrading and modifying existing machinery, we were able to resolve the contamination problem and increase the effectiveness of the existing machinery,’ said Mitchell.

Wheelabrator Group engineers introduced a number of simple devices to existing machinery in order to safeguard against the dust contamination threat.

These included a solenoid timed door interlock that ensures sufficient time is given for dust to be evacuated from the cabinet before operators can open the cabinet door.

A dust collector/foot pedal interlock was also installed, which prohibits the use of the machinery unless the dust collector is switched on.

Automatic filter pulsing and HEPA filters were also installed, to give continuous cleaning of cartridge filters and reduce dust emissions from the exhaust vents to very low levels.

A door/blow off gun interlock was installed to inhibit the use of the air blow off guns while the cabinet door is open.

Engineers also installed an in-line sieve to the machine.

Each time the media is blasted onto the components a portion of it breaks up, which can result in differences in component surface roughness between blasts.

Previously, the media was replaced with almost every blast to ensure component consistency was maintained.

Wheelabrator engineers spotted an opportunity to deliver greater savings by reducing the volumes of media used.

The in-line sieve is a size classification unit that sifts the media after each blast, removing the portion that has broken up and allowing the majority to be used again.

Not only has this simple addition saved considerable investment in media, it has also enabled operatives to realise savings in time, having reduced the number of surface roughness measurements from each blast to just twice a day.

An acoustic panel was also built around the sieve in order to reduce noise machinery levels for the operatives.

This has brought the machine within the required health and safety sound regulations and enabled it to be moved out of its confined space and into the main factory area.

Wheelabrator Group, the world leader in surface preparation technology has merged with DISA Group, the biggest name in moulding and casting technology, to form the world’s leading metallic parts improvement company*. The united organisation offers over 200 years expertise and experience, employs 2200 people over 5 continents, has 5 technology centres (France, Germany, Canada, Switzerland and Denmark) and a further 5 manufacturing facilities (India, Czech Republic, China, USA and Poland).

Wheelabrator has a reputation for innovation spanning 100 years and it’s surface preparation equipment is designed to clean, strengthen and polish metallic surfaces. Wheelabrator utilises airblast, wheelblast and vibratory mass finishing technologies to deliver these benefits to customers in over 100 countries and serves such diverse industries as Aerospace, Automotive Energy, Foundry, Medical Components, Rail and Marine.

Wheelabrator Plus is the aftermarket division of Wheelabrator providing spare parts, service and services. Through its services customers are able to extend the life of existing equipment via training, maintenance and equipment modernisation programmes, deferring the need to spend money on new equipment, but still stay ahead of the game in terms of innovation, first class production efficiency, output, environmental responsibility and sustainability.

*Norican Group is the parent company of Wheelabrator and DISA.

View full profile