Schematic diagram of production process of PET bottle blow molding machine

Schematic diagram of production process of PET bottle blow molding machine

• By karl888
• 2022/11/5 8:44:05
• Visits

pet plastic raw material + injection molding machine (preform mold) + preform + blow molding machine (bottle mold) + bottle product

1. Preheating
The preform (preform) is irradiated by an infrared high-temperature lamp, and the body part of the preform (preform) is heated and softened. In order to maintain the shape of the bottle mouth, the preform (preform) mouth does not need to be heated, so certain cooling device to cool it.
2. Blow molding
This stage is to place the preheated preform (preform) into the blow mold that has been prepared, inflate it with high pressure, and blow and draw the preform (preform) into the desired bottle.
Blow molding machines on the market are generally divided into two types: automatic and semi-automatic.
The automatic bottle blowing machine completes the two operations of blowing together through the operation of the manipulator, eliminating the process of manually placing the preheated preform (preform) into the blow mold in the middle. Greatly accelerated the rate of production, of course, the price is higher than the semi-automatic.

1. Working principle of automatic blow molding machine
The automatic bottle blowing machine is a two-step up-blowing automatic molding machine, from one out of two to one eighty-four cavities, with a maximum blowing capacity of 20L, suitable for blowing PET, PP and other crystalline plastics as raw materials. Carbonated beverage bottles, mineral water bottles, cosmetic bottles, large-caliber bottles, high-temperature resistant bottles, edible oil, automobile antifreeze, bubble water bottles, pet jars, cans, etc., and other packaging containers of any shape.
The main structure and principle of automatic blow molding machine
Feeding part: automatic reclaiming bin, reach the blanking device through the conveyor belt, and enter the standby device in an orderly manner
Gripper part: Automatically rotate the manipulator to fasten the preform to the preform seat by turning over
Chain transmission part: rotary chain transmission, carry out the whole equipment
Heating device: It is composed of two relatively independent far-infrared lamp tube ovens, which are controlled by constant temperature, and the preform is heated evenly by self-transmission.
Clamping device: Balanced positioning by positioning rack, front, middle and rear three templates, double crank link machine; by stretching solenoid valve, high pressure blowing valve, pulling body sealing cylinder, movable sealing
Blowing device: the preform enters into the mold, and through pre-blowing, stretching, and high-pressure blowing, it is then formed into a bottle.
2. Features of automatic blow molding machine:
1. Automatic operation without manual intervention
2. Structural module design, easy maintenance and operation
3. Equipment automation failure warning, when a process fails, the program will automatically switch to a safe state
4. Each action is driven by a cylinder without oil pump, which has the advantages of no pollution and low noise.
5. The air circuit design divides the action and blowing into three parts to meet the needs of different air pressures for bottle blowing and action
6. The infrared lamp is used for heating, with strong penetrating power, the preform is heated by the rotation, the orbit is revolved, the heating is uniform, fast and reliable
3. Safety protection of automatic blow molding machine:
1. The main motor reducer adopts a torque limiting mechanism to prevent damage to the machine in the event of a failure.
3. The bottle-hanging air duct is used to prevent the bottle from tipping over during transportation.
4. There is a stuck bottle detector, which will automatically stop and alarm when the bottle is stuck.
5. There is a bottle-free detector, which is used to send a working signal to the hoist, and the hoist will automatically replenish the bottle.
Summary: The above is the working principle and equipment characteristics of the automatic blow molding machine. At the same time, the automatic blow molding machine continues to develop in the direction of "safety, health and environmental protection", and the market competition continues to eliminate some manufacturers with backward technology. The automatic blow molding machine manufacturers can only continue to improve themselves, improve after-sales service, and develop more profits. Rich products to meet more customers.