semi auto bottle blowing machine
In the plastic packaging and beverage production industries, a semi auto bottle blowing machine is a piece of machinery specifically designed to mold plastic preforms (typically made of PET) into various types of bottles through heating and high-pressure gas. It seamlessly combines high-precision automated control with flexible manual operation and is widely used in the production of PET containers such as mineral water bottles, carbonated beverage bottles, cosmetic bottles, and pharmaceutical bottles.
- Voltage: 3phase 380V/220V 50/60Hz
- Neck Diameter(mm): 30
- Clamping Force (kN): 56
- Material: SS304/SS316
- Capacity: 3000-15000BPH
- Dimension(l*w*h): 3600x2000x2030mm
Price: $5000–$7500
Product Introduction
Semi auto bottle blowing machines—often referred to in the industry as semi-automatic stretch blow molding machines—are precision plastic bottle processing machines specifically designed for small- and medium-sized packaging operations and flexible production. It employs a high-pressure stretch blow molding process featuring infrared circulation heating and microcomputer PLC control. With a thoroughly optimized air distribution system, it strictly controls the defect rate of finished products to within 0.5%, ensuring that bottle wall thickness, airtightness, and gloss all meet industrial standards. Offering quick mold changes and low energy consumption, it serves as a practical hardware solution for achieving asset-light operations in the food and beverage, personal care, and pharmaceutical industries.
Structure of semi auto bottle blowing machine
- Infrared Preheating Chamber (Heating System):
Circulating heat evenly softens the preforms, preparing them for blow molding. - PLC Control Panel (Central Control System):
Digitally adjusts heating time and blowing pressure to ensure precise control. - Mold Clamping and Stretching Mechanism (Mechanical Molding System):
Cylinders drive the mold to close tightly, while stretching rods simultaneously elongate the preforms vertically. - High- and Low-Pressure Pneumatic System (Pneumatic Drive System):
Low-pressure air controls mechanical movements, while high-pressure air at 30–40 bar instantly inflates and shapes the preform. - Cooling and Mold-Locking Device (Safety and Stability System):
Rapid cooling sets the bottle shape, and high-pressure mold locking prevents the mold from bursting during blow molding.
Working Principle of the Semi-Auto Bottle Blowing Machine
- Manual Preform Loading: The operator places room-temperature PET preforms one by one onto the conveyor chain of the heater.
- Preform Heating: The preforms enter an infrared oven, where they are heated and softened while rotating on their own axis and around the conveyor; the temperature is typically controlled between 90 and 110 degrees Celsius.
- Mold Transfer: Preforms that have reached the plasticizing temperature are manually removed and quickly transferred to the forming mold of the blow molding machine.
- Mold Clamping: A pneumatic or hydraulic mechanism drives the mold to close, and the clamping device locks securely to withstand the subsequent high internal pressure.
- Stretching and Blowing: The stretching rod extends downward to lengthen the preform longitudinally, while high-pressure gas at 30–40 bar is instantly injected, causing the plastic to conform tightly to the inner wall of the mold.
- Cooling and Bottle Removal: Cooling water inside the mold rapidly cools the bottle to set its shape; the mold then opens, and the operator removes the finished product.
Specification
Key technical specifications for semi automatic blow molding machines, covering critical metrics such as theoretical production capacity, air supply requirements, cooling systems, equipment dimensions, power supply configurations, and electrical systems.
If you have specific customization needs regarding bottle neck diameters or special voltage standards, please contact our engineers.
| Theoretical output | 5500 pcs/h |
| Air source | Recommend air compressor1.2m³/min 30Kg |
| Cooling water | Recommend water3HP |
| Blower size | Length*width*height/weight3600x2000x2030mm/650kg |
| Electrical source | 3phase 380V/220V 50/60Hz |
| Electrical system | Installation power14kw |
| Capacity | 3000-15000BPH |
| Production bottle capacity | 200-1500ML |
| Suitable bottle | PP PET Bottles |
Process Description
Below is the core process flow for this model of semi-automatic bottle blowing machine, from preform heating to finished product shaping, demonstrating the efficient molding steps achieved through human-machine collaboration:
- Preform Heating: PET preforms are fed into an infrared heating chamber, where they are softened through cyclic heating to achieve high plasticity.
- Manual Transfer: Workers manually remove the heated and softened preforms from the oven and quickly secure them into the molding die.
- Mold Clamping: A pneumatic mechanism drives the mold to close, and the clamping device locks instantly to withstand the subsequent high pressure.
- Stretch Blow Molding: A stretch rod vertically elongates the preform, while high-pressure gas is injected to expand it laterally, causing the plastic to conform tightly to the inner wall of the mold.
- Cooling & Shaping: The cooling system rapidly cools and sets the bottle’s shape; the mold then opens, and the finished bottle is removed.
Details
With an intuitive touchscreen interface, independent temperature control panels for different zones, and neatly organized electrical cabinets, operators can easily and safely adjust and monitor the operating status of the entire system. Below are the details for the semi-automatic bottle blowing machine:
Functions of the semi automatic bottle blowing machine
- Human-Machine Collaboration: Manual preform loading and unloading are combined with automated machine bottle blowing, resulting in extremely low investment and maintenance costs.
- Segmented Temperature Control: Multiple independent infrared channels ensure uniform heating of preforms and a high yield rate.
- Dual Air Supply: Separate air circuits for motion and bottle blowing ensure stable high-pressure molding while maintaining low energy consumption.
- Quick Mold Change: The simplified mold design enables flexible switching between multiple bottle specifications in a short time.
- Intelligent Electrical Control: PLC and touchscreen integration, with digital parameter input, ensures stable operation.
- Safety Protection: Safety interlocks are installed on both the air lines and moving mechanical parts to ensure operator safety.
Application of semi automatic bottle blowing machine
- Human-Machine Collaboration: Manual preform loading and unloading are combined with automated machine bottle blowing, resulting in extremely low investment and maintenance costs.
- Segmented Temperature Control: Multiple independent infrared channels ensure uniform heating of preforms and a high yield rate.
- Dual Air Supply: Separate air circuits for motion and bottle blowing ensure stable high-pressure molding while maintaining low energy consumption.
- Quick Mold Change: The simplified mold design enables flexible switching between multiple bottle specifications in a short time.
- Intelligent Electrical Control: PLC and touchscreen integration, with digital parameter input, ensures stable operation.
- Safety Protection: Safety interlocks are installed on both the air lines and moving mechanical parts to ensure operator safety.
Human-Machine Collaboration
Segmented Temperature Control
Dual Air Supply
Quick Mold Change
Intelligent Electrical Control
Safety Protection
semi Automatic blow molding machine Manufacturer and Supplier
As a professional semi automatic blow molding machine manufacturer and supplier, we specialize in providing plastic container manufacturing solutions that balance low investment costs with high flexibility, tailored for small and medium-sized enterprises, new project launches, and small-batch, multi-variety production needs. Our product line includes semi-automatic bottle blowing equipment specifically designed for beverage, cooking oil, personal care, and pharmaceutical packaging. We offer a one-stop solution that includes high-pressure air compressors, chillers, and custom molds. Utilizing precise zone heating and high-pressure stretching technology, our machines are fully compatible with a variety of materials—including PET, HDPE, and PP—ensuring consistent and uniform bottle quality.
We are committed to helping our customers overcome the challenges of initial capital investment and flexible production. Through human-machine collaborative design, we have not only significantly lowered the initial equipment procurement threshold and maintenance costs, but our streamlined mold structure also enables rapid mold changes in a short time, allowing you to easily handle diverse orders; At the same time, our team of engineers can customize piping and equipment configurations based on your factory layout and existing electrical and pneumatic conditions (such as 380V/220V voltage and 30 kg air pressure requirements), providing end-to-end support from bottle prototype optimization to smooth production launch. Feel free to contact our technical team at any time to obtain a customized semi-automatic blow molding machine configuration plan and the latest quote!
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