الهيكل الرئيسي ومبدأ العمل لماكينة نفخ الزجاجات

1.1. Mold closing part

Balanced positioning by positioning rack, three templates in front, middle, and back, double crank arm connecting rod mechanism, mold closing cylinder, the electromagnetic directional control valve pushes the cylinder to drive the connecting rod crank arm to open and close the mold. The structure is reasonably designed, the operation is stable, and the clamping force is large.

1.2. Stretching and blowing part

It consists of a stretching solenoid valve, a high-pressure blowing valve, a body sealing cylinder, a movable sealing seat, and a blowing gas storage cylinder. When working, the stretching cylinder piston is pushed by the directional control valve to drive the stretching rod and the sealing cylinder to push upward on the molded preform, and the sealing cylinder seals the mouth of the preform. The stretching rod longitudinally stretches the heated elastic preform. At the same time, the gas stored in the gas storage cylinder is blown by the high-pressure blowing valve through the sealing cylinder to the bottom of the preform and then high-pressure blow molding.

1.3. The heating chain plate passes through a stepping cylinder station, is detected and positioned by a photoelectric switch, and then blown into a product by a molding mechanism. The stepping cylinder pushes a station to detect and position, and the production is repeated over and over again.

1.44. The self-rotating chain is driven by an electric motor to work continuously so that the preforms in the drying tunnel are quickly and evenly heated.

1.5. The preforms are transported and sorted through the feeding system, and the preforms are installed on the bottle-blowing machine base by the preform conveying robot and enter the drying tunnel

1.6. The heating consists of two relatively independent far-infrared lamp ovens. Each far-infrared lamp in each oven can be adjusted forward and backward in the longitudinal direction according to different preforms.

1.7. When heating the preform, while the preform rotates to make it evenly heated, the bottle mouth is cooled, and then the fan blows hot air to the preform to make the inner and outer walls of the preform evenly heated.

1.8. After the preform enters the bottle-blowing mold, the pre-blowing enters to perform circumferential stretching on the blown preform; when the stretching rod reaches the bottom of the mold, the high-pressure gas enters the mold cavity to further stretch the preform, so that the bottle wall is close to the mold wall.

1.9. The high-pressure gas is kept in the mold for a certain period, on the one hand, to eliminate the internal pressure caused by the stretching of the preform.

On the other hand, the bottle wall is close to the mold wall to improve the crystallinity of the bottle body plastic.

1.10. After the high-pressure gas is finished, exhaust and de-molding begin.

1.11. The bottle-blowing process is over.

1.12. The bottle is transferred to the lower bottle station through the chain plate, and it is picked up by the lower bottle cylinder and blown out by the airflow.

2. Bottle-blowing process adjustment

2.1. Installation operation

1. Promote standardized operating actions;

2. When blowing hot bottles, pay attention to the damage to the body caused by the high temperature of hot kerosene. The mold is 125℃-135℃, and the mold temperature machine is 140℃-150℃.

3. Please turn off the control power when testing the mold temperature;

4. Pay attention to the damage to the body caused by the loosening of the high-pressure gas joint;

2.2. Blowing molding conditions

1. Temperature: including:

A. Setting of lamp power;

B. Setting of exhaust fan temperature;

C. Effect of ambient temperature on the heating box

D. Temperature of hot mold: 125℃-135℃, water bottle mold 10-15℃;

2. Pressure: including:

A. Pre-blowing pressure 5-15 kg/cm², actual 9-12 kg/cm²;

B. Blowing pressure: 25-30 kg/cm² for cold bottles;

C. Circulating air blowing: 15 kg/cm²;

3. Flow rate: the speed when the pre-blowing pressure remains unchanged.

4. Pull rod speed: the speed at which the pull rod rises is directly related to the stretching of the preform.

5. Molding settings:

A. Pre-blowing delay.

B. Blowing delay.

C. Blowing time, exhaust time, etc.