Infrared heating lamps are used for powder curing:
Principle
infrared heat lamp bulbs mainly achieve powder curing by emitting infrared rays. Infrared rays are an electromagnetic wave. When infrared rays are irradiated to the surface of the powder coating, the polymer molecules in the powder absorb the energy of infrared rays, which intensifies the vibration and rotation of the molecules, thereby converting electromagnetic energy into heat energy. As the temperature rises, the powder particles begin to melt and undergo cross-linking reactions, eventually forming a continuous, hardened and tough cured coating.
This heating method is a non-contact heat transfer. Compared with traditional convection heating (such as hot air heating), it can transfer heat to the powder coating more directly and quickly, avoiding the heat loss and interference to the powder coating that may be generated by hot air during the heat transfer process.
Advantages
Efficient heating: infrared quartz heating elements can quickly bring the powder to the curing temperature. Because its energy is concentrated and acts directly on the powder coating, it can raise the temperature of the powder to the required curing range in a short time. For example, in some industrial production, the use of infrared heating lamps can shorten the powder curing time from 30 minutes in traditional heating methods to 10-15 minutes, greatly improving production efficiency.
Precise heating: By adjusting the position, angle and power of the halogen infrared heater lamp ，the heating area and temperature can be precisely controlled. For workpieces with complex shapes, only the irradiation direction of the heating lamp needs to be adjusted to the position of the powder coating to achieve local heating of the powder, avoiding affecting other parts of the workpiece that do not need to be heated, and ensuring the uniformity and accuracy of the curing effect.
Energy saving and consumption reduction: The electric infrared heat lamp for sale has a high efficiency in converting electric energy, and most of the electric energy can be converted into shortwave infrared heating lamp energy for heating the powder. And because of its rapid heating characteristics, the total heating time is reduced, thereby reducing energy consumption. Compared with the traditional hot air heating method, it can save about 30% – 40% energy.
Quality improvement: Because the heating speed is fast and uniform, the powder can be better leveled during the curing process, reducing defects on the coating surface, such as orange peel, pinholes, etc. At the same time, rapid curing can also prevent the pigments and additives in the powder from decomposing or discoloring during long-term heating, ensuring the color stability and quality of the cured coating.
Application scenarios
Metal product coating: In the process of surface powder coating of metal products such as metal furniture, auto parts, and mechanical parts, it is very common to use tungsten halogen heating lamp for powder curing. For example, after the car wheel hub is powder-coated, the infrared halogen heating lamp is used to quickly cure the powder coating, which can not only improve production efficiency, but also make the coating on the wheel hub surface have good adhesion, hardness and wear resistance.
Plastic product coating: For some plastic products that require high-quality surface coatings, such as plastic shells, plastic pipes, etc.,quartz heater replacement lamp can also be used for powder curing. In the production of plastic trash cans, the trash cans after powder spraying use infrared heating lamps to cure the powder, which can make the coating uniform, beautiful, and have good weather resistance.
Wood product coating: In the surface treatment of wood furniture, wooden crafts, etc., when powder coating technology is used, infrared heating lamps can accelerate the curing of powder. Compared with traditional liquid coatings, the curing of powder coatings on the wood surface can provide a more environmentally friendly and wear-resistant coating, while quartz halogen infrared heat lamp help to achieve a fast and efficient curing process.
Operation points
Wavelength matching: Different powder coatings have different absorption characteristics for infrared wavelengths. When using infrared heating lamps, heating lamps with appropriate wavelengths should be selected according to the composition of the powder coating. For example, some polyester powder coatings absorb infrared rays with a wavelength of about 3-4μm better, so infrared heating quartz lamp that emit infrared rays in this wavelength range should be selected to improve heating efficiency.
Temperature control: Although quartz heating ir lamp can heat powder quickly, the temperature also needs to be precisely controlled to prevent excessive temperature from causing over-curing of the powder, resulting in brittle coating and cracking, or incomplete curing of the powder due to low temperature. The temperature of the powder can be monitored in real time by installing a temperature sensor and a feedback control system, and the power of the heating lamp can be adjusted as needed.
Uniform heating: In order to ensure uniform curing of the powder, it is necessary to ensure that the powder on the surface of the workpiece can receive uniform infrared heating lamp quartz glass. This can be achieved by reasonably arranging the position and number of halogen ir heat lamp, or using infrared heating elements with reflective covers. For example, for irregularly shaped workpieces, multiple small Quartz Infrared Lamps Halogen Lamp can be used to irradiate from different angles, or Infrared Heating Element with curved reflective covers can be used to better focus the Quartz Infrared Halogen Heating Lamp on the powder coating.
