Stainless motors operate trouble-free in oily environment

Numerous Marlin stainless steel motors have been installed on United Biscuits' Twiglets production line, leading to considerable direct cost savings, as well as reduced maintenance and downtime.

United Biscuits' investment in stainless steel motors has brought significant returns in enhanced hygiene, reduced downtime/maintenance and extended motor life over conventional AC motors on its Twiglets production line.

Initially replacement Marlin stainless motors, supplied by MR Engineering of Birkenhead, were installed in a five-leg oil-spraying gantry system that coats Twiglets as they pass below on a conveyor. The 71 frame, 0.37kW, four-pole motors drive spinning discs that distribute the coating across the width of the conveyor.

The viscous oil inevitably gets deposited upon the motors and has to be cleaned off at regular intervals. Previously, with the conventional motors, this meant removal of the motors for cleaning by hand - which was a fiddly and time-consuming operation that took a whole weekend to complete.

Easy to clean

In contrast, the Marlin motors, with their easy-to-clean smooth bodies and IP66 protection, can be cleaned in situ with steam lances. (IP66 sealing also ensures that the ingress of moisture is prevented during hose-down cleaning operations and where water is constantly present in manufacturing processes.) The smooth bodies of the motors and the round terminal boxes totally eliminate all crevices that might catch and harbour material build-up. Consequently, these design features help to enhance hygiene by facilitating effective cleaning.

Being located directly above the line, the stainless Marlin motors also offer the benefit of eliminating any potential hygiene risk of contamination from both flaking paint and corrosion.

As well as coating the external surfaces of the original motors, the oil also penetrated the cowls covering the motors' cooling fans. The result was unbalanced running that caused premature bearing wear. This, in conjunction with vigorous cleaning routines, shortened the working lives of the original motors to less than one month. Hence there was frequent downtime, plus the expense of new motors and the cost of fitting them.

In comparison, the Marlin stainless motors have been installed since Easter 2007 and are still functioning efficiently and have not required dismantling for cleaning. Also, because the motors are totally enclosed machines, there is no risk of internal contamination to cause malfunctions.

Mick Edwards, Engineering Manager, comments: "The initial five-motor installation has proved so successful because of easy cleaning, extended motor life and consequent significant savings, that we have installed a further four motors on the same line. Two of these are employed to drive the pumps delivering the oil to the spray system, the third drives a rotating brush that cleans the conveyor carrying the Twiglets, and the fourth now drives the conveyor. We are obviously extremely satisfied with the Marlin motors."

Marlin Stainless

Electra House
Electra Way

+44 (0)1270 270022

More applications
18 hours ago
New Always-On vibration and temperature condition monitoring kit
The new FLIR SV87-KIT is said to offer machine builders a low cost, easy-to-configure 24/7 remote vibration and temperature sensing solution
18 hours ago
New brochure on standard components for packaging machines
Elesa has published a new brochure dedicated to the packaging industry. It features the company’s full range of standard components for machine designers involved in the wider packaging industry, including bottling and labelling in the food and pharmaceutical sectors
18 hours ago
Affordable, compact and powerful new camera family
The new uEye XLE camera family from IDS has been specially developed for high-volume and price-sensitive projects
1 day ago
Machinery protection – the next level?
The ability for plant engineers and machine managers to identify abnormal conditions and manage the dynamic behaviour of rotating equipment remains vital
1 day ago
Drive controllers upgrade high-bay warehouse
KEB Automation has helped a customer in Germany convert its high-bay warehouse storage and retrieval machine from an older generation of frequency inverters to its new COMBIVERT F6 drive controller
1 day ago
New multi-axis controller for dynamic positioning tasks
maxon is launching the next generation of motion controllers with its MiniMACS6-AMP-4/50/10. The controller is designed to be used where PLC solutions are deemed too expensive or cannot meet customer-specific requirements
4 days ago
Robot range extended with new 7th axis
A ready-to-fit 7th axis has been designed and manufactured by igus to enable Universal Robots (UR) and robolink robots to travel several metres
4 days ago
New CE Marking courses
Pilz UK has introduced CE Marking as a new element to its busy programme of courses in 2021
4 days ago
Rational installation technology aids machine wiring
Data Panel GmbH, a company in the Murrelektronik Group, now offers an electronic installation solution for mobile machinery that is said to be modular, highly flexible and future-proof
4 days ago
Power decentralisation made easier
In this White Paper, authored by Kamil Buczek, Sebastian Lederer, and Maximilian Hülsebusch of PULS GmbH, they discuss selective current distribution and protection in the field