In short, the automatic blow molding machine is the automatic intelligent blow molding machine equipment. At present, the main linear is two-step blow molding machine. The entire blow molding process is divided into preheating and blow molding. The detailed working principle is as follows:
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In short, the automatic blow molding machine is the automatic intelligent blow molding machine equipment. At present, the main linear is two-step blow molding machine. The entire blow molding process is divided into preheating and blow molding. The detailed working principle is as follows:
The automatic feeder loads the preform to the gripping position, and the gripping clamp removes the preform and enters the heating oven through the conveyor chain.
The preform enters the infrared tube oven through the transmission chain for heating. The infrared oven has two rows of horizontal red line lamps. The temperature of each lamp tube can be adjusted by the micro-controller PLC. The upper and lower red line lamps are stable at a constant temperature but different in height. In order to keep the bottle diameter unchanged, the bottom of the preform mouth is generally not heated. At the same time, because it is in a high temperature environment, the temperature is cooled through the dispersion tube in the chiller. The temperature from the middle of the preform to the bottom of the bottle is all thermostatically controlled. Because the hot gas evaporates upwards, the temperature of the bottom of the bottle is relatively low, otherwise it is easy to cause the bottom of the bottle to be too thin and cause the bottom of the bottle to rupture.
The heated preform enters the mold clamping device for blowing. The hot preform enters into the mold clamping device to seal the preform. Same as the pre-blowing gas, the stretching rod at the bottom stretches the preform upwards, pre-blowing the gas to a certain extent, blowing at low pressure, and at the same time entering the blowing at high pressure. In a very short period of time, the bottle is instantly formed in one shot, and the bottle is blown. Before the pre-blowing of the gas, a cold dryer is usually installed. The gas passes through a filter to filter the moisture in the air and the oil in the equipment lubrication. The gas is clean, and the formed bottle has no oil smell. In addition, the hot preform in the mold clamper will increase the heat of the mold and the temperature in the mold, which will affect both the bottle and the equipment. The chiller will ensure that the temperature of the mold drops quickly and ensure the quality and output of the bottle.
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After the high pressure and low pressure gas in the blowing bottle has been blown once, the gas is discharged, which causes energy waste and increases energy consumption. By installing a gas recovery device, the pre-blowing gas and the blowing gas enter the gas storage tank through the one-way valve , which can save 25% of energy consumption.
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