Bottle blowing machine

Bottle blow molding machine

Explore our high – quality Stretch Blow Moulding Machines. Ideal for PET processing, our pet blowing machines, including pet blow molding machines and plastic bottle blowing machines, are key for bottle manufacturing. Whether it’s a water bottle machine plastic or a general plastic bottle maker, our equipment, like the automatic bottle blowing machine, ensures efficient production. With features such as one heater one blower, these machines for manufacturing plastic bottles offer reliability. We also provide information on plastic bottle making machine price. Revolutionize your plastic bottle production with our advanced blowing solutions.

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    Blow Molding Machine:

    Working Principle of the Blow Molding Machine: The PET preform is heated by an infrared heating device to make it soften. After being heated, the preform is conveyed to the blow molding mold. At the same time, high – pressure air is injected into the preform, causing it to expand horizontally and conform to the inner wall of the mold. Then, through cooling and shaping, the final bottle shape is formed. Components of the Blow Molding Machine: Preform heating system, preform conveying system, blow molding mold, stretch blow molding system, cooling system (chiller), air compressor, air storage tank, air dryer, and air filter. Regarding the bottle mold, we can design any shape you desire. By changing the mold, you can produce multiple types of bottles with a single machine.

    Types of Blow Molding Machines: We have blow molding machines with a capacity ranging from 10 to 2000ml, those with a capacity from 3 to 10 liters, and those with a capacity from 10 to 20 liters. We offer both semi – automatic and automatic blow molding machines. The automatic blow molding machine can be connected to the filling machine through an air conveyor system. It is also possible to connect the bottle unscrambler to the filling machine.

    Model

    ModelBottle SizeSpeedPrice
    Semi – automatic 2 – cavity blow molding machine0 – 2L1000bph7,500 – 9,000USD
    Semi – automatic large – bottle blow molding machine3 – 5L / 5L – 10L400 – 600bph9,000 – 13,000USD
    Semi – automatic 18 – 20L blow molding machine18L – 20L120bph10,000 – 14,000USD
    Semi – automatic 4 – cavity blow molding machine0 – 1.5L2000bph9,500 – 16,000USD
    Automatic 2 – cavity blow molding machine0 – 2L2000bph25,000 – 30,000USD
    Automatic 4 – cavity blow molding machine0 – 2L4000 – 5500bph35,000 – 45,000USD
    Automatic 6 – cavity blow molding machine0 – 2L6000 – 9000bph55,000 – 70,000USD
    Automatic 8 – cavity blow molding machine0 – 2L1000bph80,000 – 90,000USD
    High – speed blow molding machine – 6 cavity0 – 2L12000bph95,000 – 105,000USD
    High – speed blow molding machine – 8 cavity0 – 2L15000bph125,000 – 135,000USD
    High – speed turntable blow molding machine0 – 2L20000bph180,000 – 220,000USD
    Rotary high – speed blow molding machine0 – 2L30000 – 50000bph280,000 – 500,000USD
    Automatic large – bottle single – cavity blow molding machine3 – 5L / 5L – 10L1000bph25,000USD – 45,000USD
    Automatic large – bottle 2 – cavity blow molding machine3 – 5L / 5L – 10L2000bph40,000USD – 60,000USD
    Semi – automatic PET easy – pull – off 2 – cavity blow molding machine0 – 2L / 3 – 5L600bph8,000USD – 9,000USD
    Automatic wide – mouth screw – cap 2 – cavity blow molding machine0 – 1L1500bph22,000USD – 25,000USD

    Connection Sequence of Blow Molding Machines and Auxiliary Machines:
    Auxiliary machines include: air compressor, air storage tank, air filter, air dryer, and chiller.
    Connection sequence: air compressor → air storage tank → air filter → air dryer → air filter → main blow molding machine; chiller → main blow molding machine.

    Function of each auxiliary machine:
    1. Air Compressor
    Function: Generates high-pressure compressed air (typically 25–40 bar) required to inflate PET preforms into bottles during the blow molding process.
    Key specs: Oil-free design (to prevent contamination), variable speed drive for energy efficiency.
    2. Air Receiver Tank
    Function: Stores compressed air to stabilize pressure fluctuations, ensuring a continuous and smooth air supply to the blow molding machine.
    Benefits: Reduces compressor cycling, minimizes pressure drops during peak demand.
    3. Air Filter
    Function: Removes contaminants (dust, oil aerosols, moisture) from the compressed air to protect the blow molding machine and ensure bottle quality.
    Stages:
    Pre-filter: Traces particles >5 µm.
    Coalescing filter: Removes oil/water droplets.
    Activated carbon filter: Eliminates odors (optional).
    4. Refrigerated Air Dryer
    Function: Cools compressed air to 3–5°C, condensing and draining moisture to achieve a dew point of ≤2°C. Prevents water vapor from causing defects in bottles (e.g., bubbles, uneven walls).
    Critical for: High-humidity environments or applications requiring ultra-dry air.
    5. Water Chiller
    Function: Circulates chilled water (5–15°C) to cool the blow molds rapidly, solidifying the molten PET into the final bottle shape.
    Key specs: Closed-loop system with temperature control (±0.5°C), corrosion-resistant materials for longevity.

    Please check the video of semi – automatic 2 – cavity blow molding machine: https://youtu.be/pwxgmQ85-bQ

    Semi – automatic 2 – cavity Blow Molding Machine:

    Models include 0 – 2L semi – automatic 2 – cavity blow molding machine, semi – automatic large – bottle blow molding machine (3 – 5L / 5L – 10L), semi – automatic wide – mouth bottle 2 – cavity blow molding machine, and heat – resistant bottle blow molding machine. It is composed of a preform oven and a main blow molding machine. Workers need to manually place the preforms on the preform seats in the oven. After the preforms rotate one circle in the oven, they are softened by the heating tubes inside. Then, workers manually take the preforms to the main blow molding machine, hang them on the mold, and press a button. The machine can then close the mold and blow air. As a result, the bottles are formed into the same shape as the mold, and workers manually take out the formed bottles. This process repeats. The heating temperature can be adjusted on the oven, and the blowing time can be adjusted on the touch – screen. The optimal preform heating temperature and the optimal blowing time are obtained through continuous testing. Before leaving the factory, we will adjust the optimal temperature and blowing time. If you change preforms of different weights, the heating temperature and blowing time will be different, and you need to keep trying to find the optimal parameters. Regarding the bottle mold, we can design any shape you desire. By changing the mold, you can produce multiple types of bottles with a single machine.

    Heat – Resistant Bottle Blow Molding Machine:

    This machine is used for blowing heat – resistant bottles. Compared with conventional blow molding machines, it is equipped with a mold temperature controller, which heats the mold. The bottles are blown under high temperature, and then a powerful air dryer is used for rapid cooling. In this way, heat – resistant bottles can be produced. These bottles are generally used for filling high – temperature liquids, such as hot juice. The preforms for producing such bottles are heavier. The blown – out bottles have many rib lines in their structure and can have many small protrusions on the surface. These features can enhance the structural stability. The heat – resistant bottle blow molding machine is 60 – 80% more expensive than ordinary blow molding machines. Not only is the price of the blow molding machine higher, but the prices of the preforms and caps for producing the bottles are also more expensive, as the materials of the preforms and caps are more heat – resistant.

    I. Material Differences

    CharacteristicHeat – Resistant PET BottleOrdinary PET Bottle
    Resin Raw MaterialHigh – Heat – Resistant Copolyester (such as Eastman TRITAN™)Ordinary PET Homopolyester (IPA content < 2%)
    Glass Transition Temperature (Tg)85 – 120°C70 – 80°C
    CrystallinityHigher Crystalline Structure (Optimized Heat Setting)Lower, Prone to Thermal Contraction and Deformation

    II. Equipment Structure Upgrades

    ModuleHeat – Resistant Blow Molding MachineOrdinary Blow Molding Machine
    Heating SystemInfrared + Microwave Synergistic Heating, Temperature Uniformity ±1°COrdinary Infrared Heating, Temperature Difference ±5°C
    ModuleHeat – Resistant Blow Molding MachineOrdinary Blow Molding Machine
    Mold MaterialBeryllium Copper Alloy (Thermal Conductivity 380 W/mK) + Nano – Coating for Anti – StickingOrdinary Aluminum Mold (Thermal Conductivity 160 W/mK)
    Clamping Force≥80 Tons (Prevent High – Temperature Mold Expansion)30 – 50 Tons
    Cooling SystemDual – Circuit Water Cooling (5 – 10°C Ice Water Circulation)Single – Circuit Normal Temperature Cooling Water (15 – 25°C)

    III. Analysis of Cost Differences

    Material Cost: The price of heat – resistant PET raw material is 20 – 30% higher than that of ordinary – grade PET.
    Energy Consumption: Energy consumption in the high – temperature process increases by approximately 35% (due to higher heating/cooling requirements).
    Equipment Investment: The price of heat – resistant models is about 1.5 – 2 times that of ordinary machines, attributed to:
    Special alloy molds
    Precision temperature – control systems
    Reinforced mechanical structures

    Please check the video of semi – automatic 4 – cavity blow molding machine：https://youtu.be/-zwq9IOnubQ

    Semi – automatic 4 – cavity Blow Molding Machine:

    The mold of the main blow molding machine has 4 cavities, enabling it to blow 4 bottles at a time. Compared with the semi – automatic 2 – cavity blow molding machine, it has a higher speed and can reach 2000 bottles per hour. We can also customize this machine by adding: 1. An automatic preform loader connected to the oven; 2. An automatic bottle – dropping structure for the main blow molding machine.

    Please check the video of semi – automatic 10 – 20L blow molding machine：https://youtu.be/eZ2Uec8VxMk

    Semi – automatic 10 – 20L Blow Molding Machine

    This machine is also known as a 5 – gallon bucket blow molding machine. It is a single – cavity semi – automatic machine with a production speed of 120 buckets per hour and is used in conjunction with a 5 – gallon bucket water filling machine. If you want the blown buckets to have handles, you need to purchase PE handles separately. First, place the handle in the slot of the mold, and then put the heated preform in. In this way, the handle will be firmly fixed inside the blown bucket. We can also provide an automatic 5 – gallon bucket blow molding machine, which is priced at 50,000 – 60,000 US dollars. This machine can only blow PET buckets and cannot blow PC buckets. PC buckets need to be produced by a blow molding machine, and the price of a PC bucket blow molding machine is approximately 60,000 – 100,000 US dollars. PC buckets are more robust and have a longer lifespan than PE ones. However, PC buckets contain bisphenol A. When filling hot water, bisphenol A will dissolve out, and bisphenol A is harmful to human health. When used to hold water at room temperature, the amount of bisphenol A dissolved out is relatively small. PET buckets do not contain bisphenol A.

    An automatic blow molding machine can be connected to a filling machine via an air conveyor system. The blown bottles directly enter the bottle – washing, filling, and capping section. Compared with semi – automatic blow molding machines, this method saves more labor and is more efficient. If you don’t have a blow molding machine, you need to connect a bottle unscrambler in front of the filling machine. You should pour the empty bottles into the bottle unscrambler, and it can arrange the scattered bottles in order. Then, the bottles are still conveyed to the filling machine through the air conveyor system.

    Please check the video of automatic 0 – 2L blow molding machine：https://youtu.be/DZTYDYAUvOI

    Automatic 0 – 2L Blow Molding Machine:

    We can offer various models such as 2 – cavity, 4 – cavity, 6 – cavity, and 8 – cavity machines. The more cavities the machine has, the faster its production speed. Our automatic blow molding machines are equipped with servo motors and servo control systems, which contribute to energy – saving and high – efficiency operations. For automatic machines, the production speed is also related to the size and weight of the bottles. The heavier and thicker the bottles are, the longer the blowing time required, and the slower the production speed. Therefore, you need to tell us the weight of the preforms you’ll use, the size of the bottles you want to make, and the desired blowing speed. Only then can we recommend a suitable machine model for you.

    Please check the video of automatic large – bottle blow molding machine：https://youtu.be/eadcChjSuxI

    Automatic Large – bottle Blow Molding Machine

    We have large – bottle blow molding machines for 3L – 5L bottles and 5L – 10L bottles. Customers need to purchase the bottle caps and hanging rings separately. Due to the large size of the bottles, the blowing time required is relatively long. Therefore, the production speed is generally between 1000 and 5000 bottles per hour. The machine can also be connected to a 3L – 10L filling machine via conveyors to form a complete production line.

    Please check the video of high – speed blow molding machine：https://youtu.be/AiKcqUYrTBs

    High – speed Blow Molding Machine

    The speed of the high – speed blow molding machine ranges from 12000 bottles per hour (bph) to 50000 bottles per hour (bph). We can customize rotary high – speed blow molding machines. Additionally, we can customize a combination of a high – speed blow molding machine and a filling and capping machine to form an integrated machine, namely the blow – fill – cap (BFC) integrated machine.

    There are two methods for producing PET cans:
    1. Direct blowing method using a PET can blow molding machine.
    2. Two-step production method using a PET bottle blow molding machine and a can cutting machine. Please check the video of Please check the video of Automatic PET can blow molding machine：https://youtu.be/KFqx3hZO2BU

    1. Direct Blowing Method with an Automatic PET Can Blow Molding Machine

    With this method, you need to have can preforms. You should manually place the can preforms on the conveyor or invert them on the preform seats. Then, the preforms pass through the heating tunnel. The softened preforms after heating are blown into cans in the mold. However, the drawback of this method is that the blow molding machine can only be used to produce cans and not bottles.

    Please check the video of  two – step production method with a PET bottle blow molding machine and a can cutting machine：https://youtu.be/pct_qlB7ioA

    2. Two – step Production Method with a PET Bottle Blow Molding Machine and a Can Cutting Machine:

    First, the PET bottle blow molding machine blows the preforms into bottles. Then, the upper part of the bottles is cut off by the cutting machine, and thus PET cans can be obtained. The mold of the blow molding machine requires special design, as shown in the above picture. The blow molding machine can also be an automatic model, which can be connected to the cutting machine through an air conveyor system. Moreover, such a blow molding machine can produce a variety of bottles by changing the molds.