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A carbon infrared oven from Heraeus Noblelight has helped Stoelzle Flaconnage to achieve the significantly faster curing of organic paint sprayed onto to highly decorative perfume bottles. Its installation has also saved valuable space compared with an alternative hot-air oven at the company’s Knottingley glass manufacturing plant.

Stoelzle Falconnage supplies decorated glass bottles to the prestige spirits and design market and perfumery and personal-care companies. It currently operates five production lines and produces in excess of 110 million glass containers per annum.

When it was decided to adapt a mothballed ceramics spraying machine to provide much needed additional organic paint spraying capacity to meet the requirements of a large contract, it was realised that there was insufficient space to accommodate a conventional warm-air oven. At the same time, Stoelzle engineers required that paint drying times should be reduced to match increased production line speeds.

The company contacted Heraeus and tests were carried out at the Heraeus Application Centre that demonstrated that, using carbon infrared, coatings on glass containers delivered at a line speed of 4.4m/min could be cured in 90 seconds as opposed to the 25 minutes required in a warm-air oven.

As a result, a five-zone oven was installed at the Knottingley site. This sits over the existing conveyor system and each zone consists of two side infrared modules and one top module. Each side module contains four, 7.35kW, twin-tube carbon infrared emitters and each top module one, 7.35kW, twin-tube carbon infrared emitter.

Key benefits of product application

  • The emitters have a very fast response time of less than two seconds, so the oven can be quickly switched off when there are gaps in the line or in the event of unanticipated line stoppage.
  • The oven can be simply profiled to meet three different heights of bottle by switching in pairs of side emitters.
  • Zones 4 and 5 are manually controlled, so they can be switched to a standby level during line stoppage.
  • Shayne Carr, project engineer at Stoelzle, said: ‘Apart from meeting our requirements for space saving and faster curing times, the new oven has also allowed us greater control over paint curing.’
  • Carr added: ‘It is also more energy efficient than the warm-air alternative and the emitter controllability means that we can quickly adapt to changes in bottle size.’

Heraeus Noblelight

Heraeus specialises in the production and application of high quality energy sources covering the electro-magnetic spectrum from ultraviolet to infra-red. It has over 40 years experience in infra-red technology and offers the expertise, products and systems to provide efficient and effective solutions to drying, heating and curing problems throughout industry.

A globally leading technology group, Heraeus is headquartered in Hanau, Germany. Founded in 1851, it is a family-owned portfolio company which traces its roots back to a pharmacy opened by the family in 1660. Today, Heraeus combines businesses in the environmental, energy, electronics, health, mobility and industrial applications sectors.

In the 2017 financial year, Heraeus generated revenues of €21.8 billion. With approximately 13.000 employees in 40 countries, the FORTUNE Global 500-listed company holds a leading position in its global markets. Heraeus is one of the top 10 family-owned companies in Germany.

With technical expertise, a commitment to excellence, a focus on innovation and entrepreneurial leadership, we are constantly striving to improve our performance. We create high-quality solutions for our clients and strengthen their long-term competitiveness by combining unique material expertise with leadership in technology.

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