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Carbon infrared mould heating systems from Heraeus Noblelight are helping a specialist chocolatier to maintain the high quality of its premium chocolate products, as well providing significant savings in space and energy costs.

Carbon infrared mould heating system

The production of moulded chocolate involves depositing liquid chocolate into suitable polycarbonate moulds. However, it is important that the moulds are pre-heated to a specific temperature before the chocolate is deposited.

If the moulds are too warm, the chocolate can change its characteristics and de-temper as it is deposited; if they are too cold, they will set too quickly, lose shape and possibly crack.

Previously, mould heating on the three moulding plants had been carried out by long-wave, infrared ceramic and metal element heaters. However, these were proving increasingly energy inefficient and difficult to control and the growing brittleness of the ceramics was starting cause safety issues.

In an effort to solve these problems, the company contacted Heraeus. As a result, PID-controlled carbon infrared heating systems have been installed on all three moulding machines. Two of these machines run at around 2.5m/min (12 moulds per minute) while the third runs at 3.5m/min (also 12 moulds per minute).

Key benefits of product application

  • All three machines feature a pyrometer that regulates the energy of the infrared emitters to ensure that all mould temperatures are around 30ºC when filling takes place.
  • The installation has improved temperature control of the process and has helped the chocolatier to achieve to energy savings of around 60 per cent.

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.

Heraeus Noblelight GmbH with its headquarters in Hanau and with subsidiaries in the USA, Great Britain, France and China is one of the technology- and market-leaders in the production of specialty light sources and systems. In 2016, Heraeus Noblelight employed 707 people worldwide. The organization develops, manufactures and markets infrared and ultraviolet emitters, systems and solutions for applications in industrial manufacture, environmental protection, medicine and cosmetics, research, development and analytical measurement techniques.

In the 2016 financial year, Heraeus generated revenues without precious metals of €2.0 bn and a total revenue of €21.5 bn. With approximately 12,400 employees worldwide in more than 100 subsidiaries in 38 countries, Heraeus holds a leading position in its global markets.

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