Aeroplanes and motor cars need to be lighter to save fuel but at the same time they need to convey their passengers in total safety. The blades of wind power turbines need to be light but also very strong. Infrared heat can help to meet these requirements.
Composites heating is tested in our in-house Applications Centre.
Infrared emitters help in the welding of glass fibre-reinforced pressure tanks.
Copyright Heraeus Noblelight 2011
Fibre-reinforced plastics are modern composite materials. They consist of plastics such as polyphenyl sulphide (PPS), polyether-ether-keton (PEEK) or epoxy resins (EP), in which carbon or glass fibres are embedded.
These fibres make the components strong and rigid and the plastic matrix can absorb energy. Many highly stressed components in the automotive sector, such as steering rods, which are subjected to high torsion forces, or elements for side impact protection are made from such composites.
Infrared systems are used in the manufacture of such modern components because they heat these materials rapidly and homogenously and so shorten the processes.
Composites are all different, depending on their eventual application. Short fibre duroplasts for large bodywork parts, long fibre thermoplastics for highly stressed structural components, woven rovings for wind vanes – all of these need to be made as cost-efficiently as possible.
In the manufacture of composite materials various heating processes are required, such as for the curing of duroplastic plastics. Thermoplastics are melted by heat before fusing or heated before forming or deformation. Fibre content or orientation have significant influence on thermal conductivity, so that homogenous heating of composite materials is not a simple matter.
Infrared Emitters Heat Rapidly and Homogenously.
To date, the necessary heating processes have been carried out with conventional warm air ovens. In contrast, infrared technology offers significant benefits.Infrared emitters have very short response time, often within seconds, which makes heat controllable and helps to ensure that energy is used correctly. As the heat source needs to be switched on only when needed, this saves energy.
Infrared systems are relatively compact heating units, which can heat large components on a conveyor belt, without the need for a very large oven for the complete part.
Infrared radiation can be precisely matched to the product and process and modern numerical methods such as ray tracing and computational fluid dynamics can also help to heat large surfaces homogenously.
Composite Welding with Infrared HeatA British company uses tanks of glass fibre-reinforced polypropylene for water treatment. The cylindrical water tank is made in two halves, which are then joined together by short-wave infrared radiation. The glass fibres ensure that the tanks are as robust as possible, as, in use, they have to withstand an internal pressure of around 10 bar. However, conventional plastic welding using contact heating is very difficult as the glass fibres in the plastic are exposed by melting the surfaces and can damage the hot contact plates.
In contrast, infrared emitters transfer heat in a contact-free manner and generate the heat directly in the material. As a result, the material cannot get caught in the heat source. In practice, a module with six, short wave infrared emitters heats the ends of the prepared cylinder halves. The module is then automatically retracted and the halves with the soft, heated ends are pressed together and welded.
Tests have demonstrated that this joint withstands very high pressures up to 28 bar without breaking. Also, because of the contact-free heating, there is no need for continuous cleaning of the heat source. The total process is very energy-efficient as the infrared emitter is switched on only when heat is needed.
Energy Efficiency By Exact Matching
Infrared heating technology offers many possibilities for optimising energy usage in industrial processes:• High heat transfer capacity
Heraeus Noblelight GmbH with its headquarters in Hanau and with subsidiaries in the USA, Great Britain, France, China and Australia, is one of the technology- and market-leaders in the production of specialist light sources. In 2009, Heraeus Noblelight had an annual turnover of 71.6 Million € and employed 707 people worldwide. The organisation develops, manufactures and markets infrared and ultraviolet emitters for applications in industrial manufacture, environmental protection, medicine and cosmetics, research, development and analytical measurement techniquesHeraeus
For further information please contact:Technical:
3-D-printed structures shrink when heated
26.10.2016 | Massachusetts Institute of Technology
From ancient fossils to future cars
21.10.2016 | University of California - Riverside
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
26.10.2016 | Power and Electrical Engineering
26.10.2016 | Awards Funding
26.10.2016 | Power and Electrical Engineering