In short, the PET blow molding machine is an automatic intelligent blow molding equipment. At present, it is mainly a linear secondary blow molding. The entire blow molding process is divided into preheating and blow molding. Then, let’s learn about the work of the PET blow molding machine. principle.
1. Full bottle delivery
The PET blow molding machine predicts the bottle to the position of the handle, the handle removes the bottle, and enters the heating furnace through the conveyor chain.
2. Preheating
The PET blow molding machine enters the infrared lamp oven through the conveyor belt chain for heating. The infrared oven has two rows of horizontal infrared lamps, and the temperature of each lamp can be adjusted by a microcontroller PLC. The upper and lower red lights can stabilize the constant temperature, but the height is different. The bottle mouth at the bottom is not heated, and the caliber of the bottle remains unchanged. At the same time, it is in a high-temperature environment, and the dispersion tube in the chiller is used to cool down. The temperature from the bottom of the bottle to the bottom of the bottle is controlled by a constant temperature, and the hot gas evaporates upwards, so the temperature at the bottom of the bottle is relatively low. Otherwise, the bottom of the bottle is too thin, and the bottom of the bottle is easy to break.
3. Blown into bottles
The heated PET blow molding machine enters the clamping device for blowing. The hot parison enters the mold clamping device, and the parison is sealed. The bottom stretching rod and the pre-blowing gas pull the parison upward. Before the bottle is formed and pre-blown, the freeze dryer is generally set. The gas passes through the filter, which removes moisture from the air and oil from equipment lubrication. The gas is clean and the molded bottle has no oily smell. In addition, the hot bottle is in the mold clamper, in order to increase the heat of the mold and the temperature inside the mold, it will affect the bottle and equipment. The chiller makes the mold temperature drop rapidly to ensure the quality and output of the bottle.
4. Recovery of excess gas
After the high-pressure gas and low-pressure gas in the PET bottle blowing machine are blown once, the gas is discharged, which wastes energy and increases energy consumption. The gas recovery device is installed, and the pre-blowing gas and blow-by gas enter the gas tank through the check valve, which can save energy consumption by 25%.
Selection principle of PET blow molding machine:
1. Choose according to your own product. According to different specifications such as the radius, capacity, and production capacity of the bottle, choose a blow molding machine with different models and numbers of cavities
2. Manufacturer reputation. Manufacturers of PET blow molding machines have different technologies, and it is recommended to choose a manufacturer with design capabilities, continuous research and development capabilities, and perfect after-sales service.
3. Choose blow-molded bottles with relatively high prices. Choose Tengchong blow molding machine, the price is reasonable and the performance is stable.
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