How to choose an infrared heating lamp suitable for a blow molding machine?Heating powerConsiderations: The production speed of the blow molding machine and the size and material of the preform will affect the demand for heating power. In addition, different plastic materials (such as PET, PP, etc.) have different absorption efficiencies for infrared rays. Materials with low absorption efficiency may require a higher power heating lamp to achieve the same heating effect. Infrared wavelengthConsiderations: Different plastic preform materials have different absorption characteristics for infrared wavelengths. For example, PET plastic absorbs infrared rays with a wavelength of about 2-3μm better, while PP plastic absorbs infrared rays with a wavelength of about 3-4μm better. If the infrared wavelength of the heating lamp matches the absorption wavelength of the preform material, the heating efficiency can be improved.Selection suggestions: When choosing an infrared heating lamp, first determine the material of the preform. If it is a PET preform, give priority to a heating lamp with a wavelength of about 2-3μm; if it is a PP preform, choose a heating lamp with a wavelength of about 3-4μm. Some lamps have adjustable wavelength ranges, which provide more flexibility when processing preforms of multiple materials. Shape and size of lampsConsiderations: The structure of the blow molding machine and the way the preforms are heated will affect the shape and size of the lamps. If the blow molding machine is rotary and the preforms need to be heated circumferentially, it may be more appropriate to choose a circular or arc-shaped lamp, which can better fit the shape of the preform and ensure uniform heating.Selection suggestions: Determine the shape of the lamp according to the type of blow molding machine (rotary or linear) and the size of the preform. The length or width of the lamp should also be adjusted according to the height or length of the preform, generally ensuring that it can cover 80% – 100% of the height of the preform. Temperature uniformityConsiderations: Good temperature uniformity is essential to ensure the quality of blow molding. The design structure of the lamp, the distribution of the filaments and other factors will affect the temperature uniformity. For example, a lamp with multiple groups of filaments and evenly distributed filaments can provide more uniform infrared radiation, so that the preforms are heated more evenly. In addition, some heating lamps have reflective covers. The design of the reflective cover will also affect the distribution of heat. A properly designed reflective cover can reflect and concentrate infrared rays on the preform, further improving the temperature uniformity.Selection suggestions: Check the product manual of the heating lamp to understand its temperature uniformity index. Generally speaking, heating lamps with a temperature uniformity of ±5°C can meet the requirements of most blow molding machines. At the same time, you can observe the structure of the heating lamp and choose a heating lamp with uniform filament distribution and a reasonably designed reflective cover, such as a heating lamp with a parabolic reflective cover, which can better focus infrared rays on the preform and improve the uniformity of heating. Service life and reliabilityConsiderations: In industrial production environments, blow molding machines usually need to run continuously for a long time, so the service life and reliability of the heating lamp are very important. Factors such as the quality, material and manufacturing process of the heating lamp will affect its service life. For example, a heating lamp with high-quality filament material and good packaging technology can withstand high temperatures and frequent switching operations and has a long service life.Selection suggestions: Choose a heating lamp with a good brand reputation and quality assurance. Check the product’s quality certification and user reviews to understand its reliability in actual use. Generally speaking, the service life of a high-quality infrared heating lamp can reach more than 5000-10000 hours. At the same time, consider the after-sales service of the heating lamp to ensure that it can be repaired or replaced in time when a failure occurs.

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