Robot cell is competitive against Far East manufacture

Characteristix Limited, which manufactures custom moulded plastic novelties, has boosted its manufacturing performance by over 100 per cent since installing an ABB robot-based manufacturing cell at its factory in Cornwall.

As manufacturers begin to recognise the importance of delivering enhanced levels of performance and productivity, ABB is offering businesses an insight into the capabilities of automated technology with its 10 reasons to invest in robotics guide. The guide explains how robots can deliver benefits such as higher levels of output, improved product quality and flexibility, supported by real-life examples of businesses that are already reaping the benefits.

One company featured in the guide is Characteristix Limited, a manufacturer of custom moulded plastic novelties. The company has boosted its manufacturing performance by over 100 per cent since installing an ABB robot-based manufacturing cell at its factory in Wadebridge, Cornwall.

Competing against Far East manufacturers

The robot-based GeKu manufacturing cell - comprising an ABB six-axis IRB 140 robot, Krauss Maffei plastic injection moulding machine, GeKu beam robot, conveyors and pneumatic printing press - is helping Characteristix stay competitive, even when pitted against the Far East "˜giants' of the industry. Characteristix, which has a prestigious list of license partners such as 20th Century Fox, BBC Worldwide, Disney, Universal Studios and Warner Bros, has exploited a niche in the market to supply quick-turnaround, small- to medium-batch products to UK and European-based customers - companies that would previously have sourced their requirements from the Far East.

Characteristix gives its customers considerable flexibility in that they do not have to hold costly stock and can order relatively small batches, which can then be manufactured and delivered on a fast-track basis. This compares favourably with supplies from China, for example, where customers are restricted to ordering extremely large batches, can expect three-month lead times, and need to closely examine quality and product suitability before proceeding. An additional advantage of using Characteristix is that the company can offer a total turnkey approach, which includes design and artwork.

Characteristix, part of Gemma International Group, was formed in 1997 with Andy Knight heading-up the company. Production was centred around two 70-tonne Arberg plastic injection moulding machines dating from the 1980s. After encountering continuous problems, the machines were finally replaced after incurring 160 hours of downtime in a single month.

However, this was not the company's only problem. More pressing was the customer's requirements for ongoing reductions in piece-part prices, at a rate of five per cent per annum.

Two Kraus Maffei machines were sourced and purchased as replacements in late 2002 and early 2003. These immediately helped Characteristix achieve around 30 per cent savings on set-up and operating time, and have proved to be extremely clean and virtually fault-free in operation. Payback from this was used, in part, for capital repayments on the machines, with the rest being passed on to customers in the form of reduced prices.

Cost pressures

The requirement to reduce costs by five per cent a year was unremitting, however, and Knight had to go to the Manufacturing Advisory Service (MAS), part of the DTI (now BERR), for advice on how to further improve manufacturing efficiency and reduce costs.

Assessing the company's requirements, the MAS suggested that Characteristix automate at least part of its production, and this led to the company teaming up with ABB's preferred partner GeKu, after a product demonstration at the Interplas Exhibition in 2002.

Andy Knight comments: "What was interesting about GeKu was its expertise in automated plastic injection moulding techniques and at the exhibition we saw them manufacture a key ring with a printed insert, a product we could readily identify with. Nigel Richardson, Joint Managing Director of GeKu, then arranged a visit to the ABB Customer Centre at Milton Keynes for us to witness a demonstration of the IRB 140 robot. This was suitably impressive, with its compactness, accuracy and efficiency, for us then to go ahead with a project of our own."

Productivity transformed

The new cell, which was designed, installed and commissioned by GeKu, produces 33,000 pieces a day, including birthday card badges (10 million pieces per year for Gemma International alone), stand-up figures, pendants, figurines, pencil toppers, fridge magnets, plastic paper clips, etc, moulded in the unmistakable shapes of famous cartoon characters such as Bob the Builder, Spiderman and Shrek 2, for example.

Each cell operating cycle starts with the GeKu beam robot de-moulding the runner from the Kraus Maffei injection moulder and placing it in the print fixture. A picture transfer is placed on the print fixture, and the transfer image printed under a pneumatic press. The IRB 140 robot takes the moulding out of the print fixture and places it in a holding fixture. The robot's wrist then rotates to expose a cutting tool, which snips the pieces from the runner - removing 30 pieces in about 18-20 seconds. The ABB robot removes the runner and places it into a granulator. By using the granulator to recycle the runners, Characteristix ensures that plastic waste is almost non-existent, thereby reducing its material costs by 25 per cent.

Not only has the cell ramped up production for the Cornish badge maker, but it has brought interest and variety to many of the production workforce. Knight continues: "Many of our staff who were previously employed on manual labouring tasks have risen to the challenge of robot-based manufacturing, readily participating in robot programming and operator tuition to enhance their skills."

Summing up, Knight comments: "An SME enterprise, based in rural Cornwall with 11 employees, may not seem like the most likely of companies to install robots and take on the Far East at its own game. However, the GeKu-designed cell and the ABB robot have helped us to be ultra-competitive, while we have maintained and indeed expanded a client-base made up of some of the most recognised names in the world. I am so impressed with the cell that we will install a second by the end of the year and full 'lights-out' operation will follow that."

For further information on integrating automated technology into your production line or for your PDF copy of the 10 reasons to invest in robotics guide, email robotics@gb.abb.com quoting the reference "˜10 reasons.'

ABB Robotics Division

Auriga House, Precedent Drive
Rooksley
Milton Keynes
MK13 8PQ
UNITED KINGDOM

+44 (0)1908 350300

contact.centre@gb.abb.com

www.abb.com/robotics

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