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A pet bottle blow moulding machine, also known as Pet bottle making machine or Pet bottle Blowing machine, is used to create bottles from PET plastic. Generally, it comes in three types: the injection stretch blow moulding machine, the extrusion blow moulding machine, and the injection blow moulding machine. These work in various industries for different purposes.
Injection Stretch Blow Moulding Machine
This machine begins with the injection of molten plastic into a heated preform mould. A preform is formed when the molten plastic cools off in the preform mould. The preform is then reheated and stretched sideways and vertically with the aid of a stretching rod. It is then blow out to fit the shape of the blow mould. This machine offers high-level flexibility so that bottle necks and sizes can be changed swiftly to suit different requirements. It also provides excellent clarity and good dimensional accuracy to the bottles. One major setback of this machine is that it takes up a lot of time to set up the process.
Extrusion Blow Moulding Machine
This machine begins with the extrusion of PET plastic into a parison. The parison is then enclosed into a mould. Air is then injected into the parison to expand it, making it fit into the blow mould. The parison is then cooled, thereby solidifying the material into the required shape. The Extrusion Blow Moulding Machine is used to mass-produce bottles in simple shapes. One major drawback of this machine is that material distribution is very poor.
Injection Blow Moulding Machines
In this machine, molten PET plastic is injected into the heated mould. This heated mould shapes the injected plastic into a preform. The preform is transferred to a separate moulding chamber. Here, it is heated again and then blown into the required shape. One interesting thing about this machine is that it can be automated or semi-automated. The automated kind is more suitable for industries that are high in demand. It offers precision and efficiency. Another benefit of this machine is that there is an excellent uniformity and repeatability when creating bottle shapes. However, the machine also has some drawbacks. It is more expensive to purchase than other types, and the semi-automated version might require some skilled labour to operate.
Leading manufacturers of PET bottle blowing machines are known to offer machines with these typical specifications.
Production Capacity :
The production capacity is the number of bottles the blow moulding machine can produce within a specific time period. It is often indicated in bottles per hour or per minute. For example, a machine with a production capacity of 1200-1400 bottles per hour will be able to produce the bottles within one working hour. The actual production capacity will depend on the machine operator's skill and other factors such as bottle design, machine efficiency and changeover time.
Bottle Volume Range :
The PET bottle blow moulding machine can create bottles within a certain volume range. These usually span from small (100ml-500ml) to large (1000ml-2000ml) bottles. The precise dimensions and weight limitations of the preforms used affect the volume range.
Control System :
The machine's control system determines how the blowing process is monitored and controlled. The control system may include temperature, pressure and timing controls. Some machines offer automated controls, while others have manual or semi-manual control systems.
Energy Consumption :
This is the amount of energy used by the blow moulding machine to produce a single PET container, especially in the case of machines with ovens. It includes details like the heating power of the machine expressed in kilowatts (kW) or watts (W) and the overall energy efficiency rating of the machine.
Regular maintenance is essential to keep the blow PET bottle moulding machine in optimal condition and to ensure it remains operational for a long time. It also helps to prevent unexpected breakdowns and to prolong the lifespan of the machine. Here are some maintenance tips for PET bottle blow moulding machines:
Lubrication :
Frequently used areas of the machine like moving parts, bearings and gears need to be regularly lubricated with the appropriate lubricant or grease. Doing this will reduce wear and tear on parts and help to decrease abrasion and noise levels.
Cleaning:
The blow moulding machine should always be kept clean and free from any debris, dust or leftover material from the bottling process. An appropriate cleaning solution should be used to clean the machine instead of water. This will prevent the build-up of materials and ensure high-quality output.
Inspection:
All blow moulding machines should be inspected regularly to see if there is any sign of damage or wear on movable parts, seals, gaskets and hoses. All parts found to be worn out or damaged should be promptly repaired or replaced to avoid further damage or breakdown.
Calibration:
The machine's temperature, pressure, time and other relevant parameters need to be checked and calibrated regularly to ensure accurate settings. This helps to improve the machine's efficiency and product quality.
Safety checks:
Regular safety checks on the blow moulding PET machine are also important. The operator should ensure that emergency stop buttons, safety guards and interlocks are working properly. This helps to ensure the operator's safety during operation.
The PET bottle blow moulding machine can be used in various industries to make different types of PET bottles. The following are some of the common usage scenarios of the machine.
Drinks Industry
The beverages industry is the largest user of PET bottle blow moulding machines. The machine is used to make bottles for carbonated soft drinks, water, beer, and other drinks. Different bottle shapes and sizes are used.
Food Industry
The food industry also uses PET bottles for ketchup, edible oils, sauces, juices, and other products. The blow moulding machine is used to make bottles that meet food packaging standards and are easy to use and maintain.
Pharmaceutical Industry
In the medical or pharmaceutical industry, PET bottles are used to package liquid medicines, vitamins, and other healthcare products. The PET bottle has precise measurement requirements, and the machine makes bottles.
Household Product Industry
Many household products come in PET bottles for convenient packaging and usage. These include products like cleaning liquid, bleach, laundry detergent, and more.
Cosmetics and Personal Care
Items like shampoo, conditioner, body lotion, hand sanitizer, and other cosmetic and personal care products are packaged in PET bottles. They come in various sizes and designs to cater to different brand requirements.
Industrial Chemicals and Liquids
Chemical companies use the PET bottle to package industrial chemicals, solvents, and liquids. The bottles are made per the chemical company's specifications, with emphasis on safety and compatibility.
Consumer Goods
Some other products are also packaged in PET bottles for easy consumption and disposal. These include oil, detergent, glue, and other liquids.
Custom and Niche Markets
Apart from the above-mentioned industries, there are other custom and niche markets that require specific kinds of PET bottles. These include airline and hospitality, automotive, agricultural, and other specialized industry applications.
Production scale:
When selecting a PET bottle blow molding equipment, consider the production volume. Small-scale systems may be suitable for producing hundreds of bottles per day, whereas, for higher volumes, an automated system would be more efficient.
The complexity of the bottles:
Simpler bottles can be produced using injection-stretch blow molding at lower costs, while more complicated designs usually need the capabilities of an injection blow molding PET bottle machine.
Material compatibility:
Ensure the blow molding machine is suitable for the specific type of PET resin that will be used for bottle production. Some machines may have limitations regarding the materials they can process.
Tooling and customization options:
Consider the available tooling and customization options to adjust the blow molding process to meet specific bottle design requirements.
Space requirements:
Evaluate the footprint of the blow molding machine and ensure that adequate space is available for setup, operation, and maintenance within the facility.
Energy efficiency:
Examine the power consumption and energy efficiency to evaluate the operational costs associated with using the blow molding machine for bottle production.
Automation level:
Assess the required degree of automation for production line integration and consider the essential features, such as automated feeding, control systems, and quality assurance mechanisms.
Technical support and service:
Consider suppliers offering strong technical support, machine servicing, and spare parts availability to ensure the long-term operation and performance of the blow molding machine.
Q1 Are the pet bottle blow moulding machines eco-friendly?
More and more industries are interested in making machines that care about the environment. Some features are air recycling, which saves energy, and making bottles that can be recycled. Better designs of these machines use less energy and keep the environment safe.
Q2 What is the difference between normal blow moulding and PET specific blow moulding?
All blow moulding is about shaping plastic with air. But PET blow moulding machines are made to specifically handle PET plastic. This is the high-performance plastic used for drink bottles. These machines have special features for the unique challenges of working with PET, like precise temperature control and adapted moulding techniques.
Q3 What are the production limits of PET bottle blow moulding machines?
Machines are available to make small to big numbers of bottles. Some are great for making a few to fit small businesses, while others can make thousands very fast, meeting the needs of big companies. The choice depends on the number of bottles one plans to sell.
Q4 Can these machines handle materials other than PET?
Most PET blow moulding machines are meant to work with PET plastic. However, some advanced models might be able to handle different materials if they have special attachments or adjustments.
