The role of halogen heating lamps in bottle blowing machinesPreheating the parisonDuring the bottle blowing process, the plastic parison needs to reach a certain temperature before it can be blown into a bottle smoothly. The halogen heating lamp can quickly heat the parison to a suitable temperature range to soften the plastic. For example, for the common PET (polyethylene terephthalate) plastic parison, it needs to be heated to about 100-120\\u2103, at which time the activity of the plastic molecular chain is enhanced and the material becomes well plastic. This is like a piece of hard wax will become soft after heating, which is convenient for subsequent bottle blowing operations.Ensure uniform wall thicknessUniform heating is a key factor in ensuring the quality of the bottle. Halogen heating lamps are usually reasonably arranged around the bottle blowing machine to heat the parison in all directions. For example, in a rotary bottle blowing machine, the parison is evenly irradiated by the halogen heating lamp during the rotation process, so that the temperature distribution of the parison in the circumferential direction is relatively uniform. When compressed air is blown into the parison to expand, the plastic material can be evenly distributed due to the same temperature in each part, thereby ensuring uniform wall thickness of the bottle. If the heating is uneven, the plastic in the high temperature area will be more easily blown up during bottle blowing, resulting in deviations in the wall thickness of the bottle, affecting the quality and performance of the bottle.Improve production efficiencyThe halogen heating lamp has a relatively fast heating speed, which can make the preform reach the temperature required for bottle blowing in a shorter time. Compared with some other heating methods, such as natural convection heating, it can greatly shorten the production cycle of each bottle. In the process of mass production of plastic bottles, this fast heating feature enables the bottle blowing machine to produce more qualified bottles per unit time, improving the efficiency of the entire production process.Improve bottle qualityProper heating can make the plastic molecules better arranged and fused. When the preform is heated by the halogen heating lamp, the plastic molecules can be more closely combined during the bottle blowing process, thereby improving the strength and toughness of the bottle. At the same time, uniform heating can also reduce defects on the surface of the bottle, such as local thinning, wrinkling and other problems, so that the produced bottles are of better quality and more beautiful appearance.

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