Description of the blowing process of the automatic bottle blowing machine
1. The main structure and principle of the machine
1.1. Clamping part
The positioning rack is balanced and positioned, the front, middle and rear three templates, the double crank arm linkage mechanism, and the mold clamping cylinder. The cylinder is driven by the electromagnetic directional control valve to drive the linkage crank arm to open and close the mold. The structure design is reasonable, the work runs smoothly, and the clamping force is large.
1.2. Stretching and blowing part
It is composed of a stretch solenoid valve, a high-pressure blowing valve, a pull-body sealing cylinder, a movable sealing seat, and a blowing air storage cylinder. When working, the piston of the stretching cylinder is pushed through the directional control valve, and the stretching rod and the sealing cylinder are pushed up on the preform that has been closed. At the same time, the gas stored in the gas storage cylinder is stretched longitudinally, and the preform is bottom blown by the high-pressure blowing valve through the sealing cylinder, and then the preform is subjected to high-pressure inflation molding.
1.3. The heating chain plate passes through the first station of the stepping cylinder, is detected and positioned by the photoelectric switch, and then blown into the product by the molding mechanism. The stepping cylinder is pushing a station to detect and position, and continuous production is repeated.
1.4. The self-rotating chain is driven by the motor to work continuously, so that the preform in the drying tunnel can be heated quickly and evenly.
1.5. The preform is conveyed and sorted through the feeding system, and the preform is installed on the bottle blowing machine base by the conveying manipulator, and enters the drying tunnel.
1.6. The heating consists of two sets of relatively independent far-infrared lamp ovens. Each far-infrared lamp of each oven can be adjusted longitudinally according to different preforms.
1.7. Preform heating. While the preform rotates to make it evenly heated, the bottle mouth is cooled, and then hot air is blown to the preform by a fan to make the inner and outer walls of the preform evenly heated.
1.8. After the preform enters the blowing mold, the pre-blowing air enters to stretch the blown preform in a circular direction; when the stretching rod reaches the bottom of the mold, high-pressure air enters the cavity to further stretch the preform, making the bottle wall tight. Paste mold bi.
1.9. The high-pressure gas is kept in the mold for a certain period of time, on the one hand, it eliminates the internal pressure caused by the stretching of the preform.
On the other hand, make the bottle wall close to the mold wall to improve the crystallinity of the bottle body plastic.
1.10. After the high-pressure gas is over, the venting and demolding will begin.
1.11, the blowing process is over.
1.12, the bottle is conveyed to the bottle-loading station through the chain plate, which is picked up by the bottle-loading cylinder, and then blown out by the airflow.
2. Blowing process adjustment
2.1. Installation and operation (precautions)
1. Promote standardized operating actions;
2. When blowing the thermos bottle, pay attention to the damage to the body caused by the high temperature of hot kerosene. The mould is 125℃-135℃, and the mould temperature machine is 140℃-150℃.
3. Please turn off the control power when testing the mold temperature;
4. Note that the loosening of the high-pressure gas connector will cause physical damage;
2.2. Blow molding conditions
1. Temperature: including:
A. Setting of lamp power;
B. Setting the temperature of the exhaust fan;
C. The influence of ambient temperature on the heating box
D. The temperature of the hot mold: 125°C—135°C, water bottle mold 10—15°C;
2. Pressure: Including:
A. The pre-blowing pressure is 5-15 kg/cm², the actual pressure is 9-12 kg/cm²;
B. Blowing pressure: cold bottle 25-30 kg/cm²;
C. Cyclic blowing: 15 kg/cm²;
3. Flow rate: the speed when the pre-blowing pressure is constant.
4. The speed of the tie rod: The speed at which the tie rod rises is directly related to the stretching of the preform.
5. Forming settings:
A. Delay in pre-blowing.
B. Blowing delay.
C. Blowing time, exhausting time, etc.
1. Warm up
The preform (embryo) is irradiated with an infrared high-temperature lamp to heat and soften the body (embryo) of the preform (embryo). In order to maintain the shape of the bottle mouth, the mouth of the preform (embryo) does not need to be heated, so it needs to be heated. The cooling device for cooling operation.
2. Blow molding
In this stage, the preheated preform (embryo) is placed in the blow mold, and the inside is inflated with high pressure, and the preform (embryo) is blown and drawn into the required bottle.
Bottle blowing machines on the market are generally divided into automatic and semi-automatic.
The automatic bottle blowing machine combines the two operations of bottle blowing through the operation of the manipulator, eliminating the need for the manual process of putting the preheated preform (embryo) into the blow mold. Greatly speed up the production rate, of course, the price is also higher than the semi-automatic.
Professional blow molding machine manufacturerTAIZHOU BORG BLOWING MACHINE SAMRT EQUIPENT CO,LTD.