1. The main structure and principle of blow moulder
1.1. Clamping part
The positioning frame is balanced and positioned, the front, middle and rear three templates, the double-bend linkage mechanism, and the mould clamping cylinder. The cylinder is driven by an electromagnetic reversing valve to drive the connecting rod crank arm to open and close the mould. The structure design is reasonable, the work is stable, and the clamping force is large.
1.2. Stretch blow moulding part
A stretch solenoid valve, a high-pressure blowing valve, a pull body sealing cylinder, a movable sealing seat, and a blowing air storage cylinder make up this system. The stretching cylinder’s piston is pushed through the direction control valve during operation, and the stretching rod and sealing cylinder are driven to push up the closed preform. The stretch rod heats the elastic preform while the sealing cylinder seals the mouth of the preform. The gas in the gas storage cylinder is stretched longitudinally at the same time, and the preform is bottom blown through the sealed cylinder by the high-pressure blowing valve, followed by high-pressure inflation moulding.
1.3. The heating chain plate is blown into the product by the forming mechanism after passing through the first station of the stepping oil cylinder, where it is detected and positioned by the photoelectric switch. The stepping oil cylinder aids in station detection and positioning, as well as continuous production.
1.4. The motor drives the self-rotating chain to work continuously, allowing the preform in the drying tunnel to be heated quickly and evenly.
1.5. The preforms are conveyed and sorted through the feeding system. The preforms are installed on the base of the bottle blowing machine by the conveying manipulator and enter the drying tunnel.
1.6. Two relatively independent far-infrared lightboxes provide heating. Each oven’s far-infrared lamp can be adjusted longitudinally to accommodate various preforms.
1.7. Warm-up ahead of time. The mouth of the bottle cools while the preform is rotated to ensure even heating, and then a fan blows hot air into the preform to ensure even heating of the inner and outer walls.
1.8. After the preform enters the blow mould of bottle moulder machine, the pre-blowing air enters to stretch the blown preform in the circumferential direction; when the stretch rod reaches the bottom of the mould, high-pressure air enters the cavity to further stretch the preform so that The wall of the bottle becomes tight. Blurred bi.
1.9. On the one hand, keeping the high-pressure gas in the mould for a certain period of time eliminates the internal pressure created when the preform is stretched.
Make the bottle wall close to the mould wall, on the other hand, to improve the crystallinity of the bottle body plastic.
1.10. After the end of the high-pressure gas, start exhausting and demolding.
1.11, the blowing process is over.
1.12, the bottle is transported to the bottle loading station through the chainplate, picked up by the bottle loading cylinder, and then blown out by the airflow.
Blowing process adjustment
2.1. Installation and operation (precautions)
1. Promote standardized operation behaviour;
2. When blowing the thermos, be aware of the dangers of the high temperature of hot kerosene on the body. The temperature of the mold is 125°C-135°C, and the temperature of the mold temperature machine is 140°C-150°C.
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 moulding conditions of blow moulder machine
1. Temperature: including:
A. Lamp power setting;
B. Set the temperature of the exhaust fan;
C. The influence of ambient temperature on the heating box
D. Hot mold temperature: 125°C—135°C, water bottle mold 10—15°C;
2. Pressure: Including:
A. The pre-blowing pressure is 5-15 kg/cm², and the actual pressure is 9-12 kg/cm²;
B. Bottle blowing pressure: 25-30 kg/cm² for cold bottles;
C. Circulation blowing: 15 kg/cm²;
3. Flow rate: the speed at a certain pre-blowing pressure.
4. The speed with which the tie rod rises is proportional to the preform’s stretching.
5. Forming settings:
A. Delay in pre-blowing.
B. Delay in blowing.
C. Blowing time, exhausting time, etc.