infrared curing and convection curing pdf

Infrared Curing And Convection Curing Pdf

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Infrared IR energy can be used as a source of heat to cure a variety of industrial coatings. Some of the energy is reflected off the surface, some is absorbed into the coating, and some heats the substrate. In powder coating, this direct transfer of energy creates an immediate reaction in the polymer, and curing called crosslinking begins quickly once the surface is exposed to the emitter. In IR curing ovens, heat is very rapidly transferred by radiation directly to the coating. Infrared ovens can cure a coating much faster than convection ovens, since they directly heat the part surface that is coated and do not waste BTUs to heat the entire substrate or the surrounding air.

BGK Gas Catalytic

The coatings and paint industries strive to provide high technology coatings while reducing volatile organic compounds and energy consumption to produce a finished coating. Conventionally Convection ovens are used to cure the coatings. But this process which uses electric heaters is not an optimal process and is associated with various disadvantages. Improved technologies are available today, which can either replace or improve the convection curing process.

Infrared Curing is such a technology which uses Infrared rays emitted by an Infrared emitter to provide the required cure.

Infrared curing applies light energy to the part surface by direct transmission from an emitter. Some of the energy emitted will be reflected off the surface, some is absorbed into the polymer and some is transmitted into the substrate. This direct transfer of energy creates an immediate reaction in the polymer and cross linking begins quickly once the surface is exposed to the emitter. Infrared emitters are often custom manufactured to suit the production demand.

The various aspects of Infrared curing and convection curing and the possibility of combining these two technologies into a singe system will be discussed in this seminar. Curing is a process of baking surface coatings so as to dry them up quickly.

Curing is a broad term which means all the techniques employed for the finishing operations incurred during part production. Curing essentially involves either the melting of the coating or evaporation of volatile fluids present in the coating by the application of heat energy. Curing is given to a wide range of materials both organic and inorganic. Usually curing is given to materials like ,.

Curing is also given to Rubber and Latex. The principle used for curing can also be used for drying rice and grains. Convection ovens are usually used for curing purposes. Traditional convection ovens use heated forced air to provide the necessary cure.

Convection ovens consist of a chamber lined on the inside with Electric heaters. The shape of the chamber will be in accordance to the shape or geometry of the part being cured.

A series of blowers circulate the heated air around providing the required cure. This process depends on convection to transfer heat from hot air to body surface and conduction to transfer heat to the interior of the surface. The air being delivered is held at temperature using closed-loop control, which provides predictable, repeatable results. Typically a temperature of around degree farenheit is required for paint or powder.

Though convection ovens are widely used today they have certain disadvantages, which chokes the overall productivity of a company. Convection is a slow process. It takes a considerable amount of time for the heaters to heat up and raise the temperature of air to the required level.

This causes a lag in the process and hence the curing time increases. Longer curing time spells reduced assembly line movement. This in turn reduces productivity. They use around 7. These are significantly larger figures for any company trying to bring energy consumption under control. The additional use of blowers and compressors further increases energy consumption.

Convection ovens are bulky in nature. Due to the presence of compressors and blowers, additional space is needed, which in turn increases the floor area requirement. Convection heating requires a medium for transmission of heat. Hence blowers are employed for good circulation of heated air. This increases the overall cost of the equipment.

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Powder coating

The ovenfeatures precise control of conveyor speed and internal thermal environment. Infrared panels and exclusive heat dispersion plates transfer heat by convection. A touch-screen monitor makes it convenient to operate. The ovens accommodate substrates that contain tall components on both top and bottom sides. A SMEMA- compatible chain conveyor allows double-sided board processing, and can be easily integrated into existing conformal coating lines. Oven workflow is right-to- left. The ovens easy-access design makes it possible to dismantle and replace heating elements and convection units relatively quickly.

The coatings and paint industries strive to provide high technology coatings while reducing volatile organic compounds and energy consumption to produce a finished coating. Conventionally Convection ovens are used to cure the coatings. But this process which uses electric heaters is not an optimal process and is associated with various disadvantages. Improved technologies are available today, which can either replace or improve the convection curing process. Infrared Curing is such a technology which uses Infrared rays emitted by an Infrared emitter to provide the required cure. Infrared curing applies light energy to the part surface by direct transmission from an emitter. Some of the energy emitted will be reflected off the surface, some is absorbed into the polymer and some is transmitted into the substrate.

BGK offers a proven line of curing technologies and now expands its product offering with the introduction of the Gas Catalytic Infrared Ovens. Providing faster process times than convection style ovens, resulting in less equipment and floor space. Catalytic IR Ovens offer both natural gas or propane fired catalytic infrared heaters, which emit infrared heat through a safe, technology which produces a uniform low intensity heat. This heat, in the form of medium to long wavelength energy, is evenly absorbed by a wide range of organic materials, providing a versatile curing solution for low to high density applications. The reduced operating costs, offered by catalytic heaters, has become the preferred system for retrofits of large electrical infrared applications, offering substantial energy cost reduction with rapid payback. The key to a great gas catalytic oven is the emitter. Our emitters are environmentally friendly, unlike normal combustion ovens, producing only trace amounts of nitrogen oxides due to their low operating temperatures.


Improved technologies are available today, which can either replace or improve the convection curing process. Infrared Curing is such a.


Powder coating

An iron foundry replaces their troublesome, polluting natural gas-fueled industrial convection oven with a newer technology: electric infrared IR heaters. The instant-on IR heaters produce cleaner heat using far less power, reduce maintenance, and quickly pay for themselves through increased productivity. Skip to main content. Search form Search. Home Home.

Infrared IR energy can be used as a source of heat to cure a variety of industrial coatings. Some of the energy is reflected off the surface, some is absorbed into the coating, and some heats the substrate. In powder coating, this direct transfer of energy creates an immediate reaction in the polymer, and curing called crosslinking begins quickly once the surface is exposed to the emitter. In IR curing ovens, heat is very rapidly transferred by radiation directly to the coating.

Details the use of infrared energy as a heat transfer mechanism to products that would not normally be regarded as candidates for this form of heating. Work undertaken between Eastern Electricity and Heraeus Noblelight to determine the benefits of infrared in combination with convective heat transfer applied to the curing of electrophoretic coatings on automotive body shells is given to illustrate complex geometric structures. Uses infrared heating applied to the curing of coatings on wooden substrates to highlight problematic substrates. Hampshire, R.

Robotics Inc.

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