1. Rotary Blow Molding Machine
1. Preform enters the heating machine from the
preform unscrambler.
2. Heating furnace to heat the preform.
3. Tie rod stretches the preform in the mold.
4. Inject low-pressure air to complete the first molding.
5. Inject high-pressure air to fully form.
6. Bottle leaves from blow molding machine.
a) Machine operation adopts TFT touch screen with multi languages and friendly interface. Speed, shift capacity and technical specifications can be set on the menu.
b) High efficiency: 2,500-2,600 BPH/cavity (500ml water bottle).
c) Double blowing system. Monitoring pressure change curve of each cavity during bottle forming and providing accurate timely parameters, easier for operator to regulate technical parameters and ensure quality stability.
d) Adopt cam organism and accurate mechanical arm transferring technology with high speed preform and bottle feeding, avoiding contamination.
e) Cam organism controls mold opening and clamping precisely with special mold clamping boost system and firm mold shelf structure; independent control of blowing parameters of each cavity; malfunction diagnosing function; enhanced neck sealing stability; regulating blowing pressure; stretching bar controls accurate preform axial stretching and 1st / 2nd blowing controls vertical stretching; regulating of 1st / 2nd blowing precisely ensures ideal distribution of bottle wall thickness.
f) Heating adopts far infrared temperature control; each heating lamp of pre-heating and regulating zone can be regulated; timely temperature monitoring system ensures technical stability and accuracy, avoiding over high temperature of outer preform wall; 10-20% electrical power is saved by this heating system.
g) Air recycling system may save compressed air by 30-50%.
h) Technical parameters like heating temperature and blowing time can be set according to different preforms and bottle design.
i) Fast mold changing (6-screw, 6-8 min for each mold) reduces stop time and increases production efficiency.
j) Humanized design makes complicated industrial operation get used to habits.
k) Blowing mold is made of aluminum magnesium alloy with oxidization treatment on surface to prolong mold lifespan.
l) Preform infeed starwheel adopts preform block detecting device. When blocks, preform will be rejected and reset automatically.
m) Safety door is equipped with alarming device to protect operators.
Products Description：
Preform feeding system
Single-channel preform feeding and star wheel preform feeding , which effectively solves the problem of jamming and wear between
preforms and preforms.
Revolution system
Special chains are used, driven by servo motors, so that the heating unit moves smoothly, fast in positioning and low in noise
Hopper and elevating system
A certain amount of preforms will be stored in hopper to guarantee the continuous of producing. The preforms will be elevated to the lining device by the belt of hopper and then sent to the oven along the filling rail to be further produced.
Once preforms are loaded into the hopper, they are supervised by the computer. The number of the loading preforms can be automatically adjusted according to the production speed.
The output speed can be freely adjusted according to different preforms to make the number of loading preforms match up with the production speed.
The design of rotary plastic transferring belt ensures preforms avoiding damage and contamination during the transferring.
After being lined, preforms pass the guiding wheel to the dust moving device, then to preform seats, and then go into the oven to be heated. Preforms are heated by seven to ten layers lamps in the oven, every layer lamps can heat separately. The heating circulation of the fan in the bottom of the oven make the average temperature of the inside oven.
Features:
l The closed preform path is safe and hygienic. Ion precipitator can be added to it as needed.
l Preform storage hopper, with ultra-large capacity, which can accommodate up to 50,000 preforms.
l Splicing structure, easy to transport and disassemble with simple and elegant appearance.
l Using food-grade PP material, healthy, environment friendly and making no slag or other contaminant to the preforms.
Oven
In the oven the preforms move forward and rotate themselves to make every part of the bottle have the same temperature. After heating, the preforms have elastomeric property, so the preforms can be stretched biaxial. For the soft drinking bottles the range of temperature is 90~100℃, while for hot filling bottles the range is 110~120℃. The heat of the oven is controlled by the quantity of the working lamps, the whole setting temperature and the power of the oven.
Main Configuration：
| Component name | Origin | Brand |
Electrical/Control Components |
| Air switch | France | Schneider (TE) |
| Intermediate relay | Japan | Omron ( OMRON ) |
| Contactor | France | Schneider (TE) |
| Button | France | Schneider (TE) |
| Control switch | France | Schneider (TE) |
| Magnetic switch | Taiwan | AIRTAC |
| Touch screen | Taiwan | Delta (DELTA) |
| Motion Controller | Taiwan | Delta (DELTA) |
| Servo | Taiwan | Delta (DELTA) |
| Cylinder | Taiwan | AIRTAC |
| |
| First blow valve | | Norgren |
| Second blow valve | Norgren |
| Vent | Norgren |
| Cylinder control valve | Taiwan | AIRTAC |
| Clamping rail | South Korea | WON |
| Composition | Project | Technical Parameters |
| | The largest diameter of the product (mm) | Φ103 |
| Product bottle size (mm) | Φ18 ~ Φ38 |
| The maximum height of the product (mm) | <340 |
| Suitable for rpeform maximum height (mm) | <165 |
| Clamping stroke (mm) | 125 |
| Bottom mold stroke (mm) | 50 |
| Bottle spacing mmM) | 110 |
| Production capacity (bottle/hour) | 8000-90000BPH（1.5L） |
| Production capacity (bottle/hour) | 15000-16000BPH（550ML） |
| Number of mold cavities |
|
| | Heating unit | 6 |
| Layers of heating lamp | 8 |
| Number of germ tube seats (pieces) | 156 |
| Electrical parameters | Voltage | 380V |
| Frequency | 50/60Hz |
| Use power | 30-40kw/h |
| Installed power | 100kw |
| Gas source
(The high-pressure air consumption depends on the volume of the PET bottle) | Low pressure compressed air | 1Mpa |
| Low pressure compressed air consumption | 1.0m³/min |
| High pressure compressed air | 3.0Mpa |
| High pressure compressed air consumption | 10 m³/min |
| Cooling water | Pressure | 2-4bar |
| Cooling water (water temperature ≤18°C) | Flow | 6m 3 /h |
| Weight | Host \ heating machine \ electric control box, etc. | about 7.5 t |
| Equipment Dimensions | Host (L × W × H) | 5000mm×2300mm×2900mm |
| Preform unscrambling machine (L×W×H) | 2950mm×2120mm×3200mm |
