The blowing process of the bottle blowing machine is divided into two parts.
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An infrared high-temperature lamp irradiates the preform to heat and soften the preform. To maintain the shape of the bottle mouth, the preform mouth does not need to be heated, so a particular cooling device is required to cool it.
The preheated preform is placed in the blow mould, and the inside is inflated with high pressure to blow the preform into the required bottle. The automatic bottle blowing machine combines the two operations of bottle blowing through the operation of the manipulator, eliminating the need for the manual process of putting the preheated preform into the blowing mould. Significantly accelerate the rate of production.
5D/12D/20D Double Station Blow Molding MachineThe blow moulding machine process of the bottle blowing machine is a two-way stretching process. In this process, the PET chain is extended, oriented and arranged in two directions, which increases the mechanical properties of the bottle wall. It improves the tensile, tensile, and impact strength. It has good airtightness.
Although stretching helps to increase strength, it should not be overstretched. It is necessary to control the stretch-inflation ratio:
Do not exceed 3.5-4.2 in the radial direction and 2.8-3.1 in the axial direction. The wall thickness of the preform should not exceed 4.5mm.
Blowing is carried out between the glass transition temperature and the crystallization temperature, generally controlled between 90 and 120 degrees. The PET exhibits a highly elastic state in this interval and becomes a transparent bottle after rapid blow moulding and cooling, and setting.
This temperature is determined by the length of the cooling time during the injection moulding process (such as the Aoki bottle blowing machine), so the relationship between the injection and blowing stations must connect.
The blowing process includes stretching-blowing once-blowing twice. The three actions are concise, but they must be well-coordinated, especially the first two steps to determine the overall distribution of the material and the blowing quality.
Therefore, it is necessary to adjust: stretching start timing, stretching speed, pre-blowing start and end timing, pre-blowing pressure, pre-blowing flow, etc.; if possible, it is better to control the overall temperature distribution of the preform, bottle The temperature gradient of the inner and outer walls of the blank. In the process of rapid blow moulding and cooling, induced stress is generated in the bottle wall. For gas-filled beverage bottles, it can resist internal pressure, which is beneficial. Still, hot-filled bottles must ensure that it is fully released above the glass transition temperature.
5D/12D/20D Double Station Blow Molding MachineThe common factor for bottle accumulation is that the stretching rod is not adjusted in place. It is recommended that the stretching ratio between the preform and the bottle body is preferably 1:2.5 (excluding the mouth part), and at the same time adjust the heating temperature to extend the pre-blowing.
Bottle mouth deformation Generally, during the heating process of the preform, the transmission chain drives the bottle base to transfer the temperature to the preform mouth. During the heating process, the temperature continues to accumulate, and the bottle mouth bulges and deforms. It only needs to increase the air-cooling or water-cooling of the bottle mouth. If the customer&#;s conditions permit, you can refer to the imported machine to install central air-conditioning in the production workshop to keep the ambient temperature of the workshop at an average temperature.
As long as the equipment is controlled strictly following the method in the instruction manual and the performance of each safety door is checked regularly, the equipment as a whole is safe. However, the most significant hidden danger of the equipment is mainly on the seals of the water jacket and air jacket. For example, the water and air jacket are damaged, and the maintenance works are more troublesome.
portable sports bottleThe chiller for the carbonated bottle is about five times larger than the chiller for the water bottle. A simpler algorithm can be calculated at bottles/hp; for example, bottles/hour can equip with a 30-hp chiller. To ensure the stress requirements of the carbonate bottle bottom, the cooling time is generally 1.2 seconds, and the bottom mould temperature is 11 degrees. The number of lamp zones in the heating furnace can refer to the configuration of the hot filling machine, and the adequate heating time of the preform should be no less than 33 seconds.
At present, the preform mouths used in the production of hot-filled bottles in the industry are generally divided into crystalline mouths and non-crystalline mouths, and non-crystalline mouths are divided into 28 months and 38 months.
As far as the bottle mouth is concerned, the crystalline mouth can withstand 100 degrees without deformation, but the upper limit of heat resistance of the non-crystal mouth is only 92 degrees.
The preform and grammage used for blowing the medium-temperature bottle are best selected according to the requirements of hot filling. Suppose it is designed according to the single-mode bottles/hour. In that case, the single-mode cycle is 2.1 seconds, of which 1/4 of the time is the time to unlock the mould, and the remaining 3/4 of the time is the processing time, minus the balance; sealing, stretching, and pre-blowing is 0.2 seconds. The time for high-pressure forming and pressure-holding crystallization is only 1 second, the time for cold blowing and setting is 0.3 seconds, and the time for closing and closing is 0.1 seconds.
The time allocation mentioned here is only a reference value, and the specific time should be adjusted and guaranteed in real-time through the control panel during production.
Strictly speaking, compressed air must be processed by a freeze dryer before it can be used for high blowing and cold blowing. Because the pipeline between the air compressor and the bottle-blowing machine is long, to avoid the pipeline from being exposed to the sun, The compressed air pipeline used for cold blowing and shaping must be covered with thermal insulation cotton to ensure that the temperature of the air source is not affected.
If you want to know more details about Jwell blowing machine parts, you can download blowing machine parts PDF file.
Summary: The above are the most common problems in the use of the bottle blowing machine. The bottle blowing machine causes different bottle problems during the blowing process. On the one hand, it is related to the structure of the bottle blowing machine itself, and on the other hand, it is the problem of debugging and use. , Most of the faults are caused by improper use of human factors. When you encounter problems, don&#;t worry; carefully analyze the problematic points of the blow moulding machine fault, carry out troubleshooting one by one or consult the sales service engineer of the blow moulding machine manufacturer.
PET bottle blowing machine works by heating and melting PET resin pellets, which are then forced into a mold cavity. The molten plastic is then cooled and solidified, and the bottle is ejected from the mold. The machine is typically equipped with a preform loader, a heating oven, a blowing station, and a bottle ejector. The preform loader loads the PET resin pellets into the heating oven, where they are melted and then forced into the mold cavity. The blowing station then applies pressure to the molten plastic to form the bottle, and the bottle ejector ejects the finished bottle from the mold.
PET bottle blowing machine is ideal to manufacture different shapes and sizes of PET/PE/PC bottles. It is the most high-cost performance solution for large production requirements of plastic bottles. And this pet bottle molding machine is quite suitable for small and medium-scale projects. It is widely used in lots of industries, such as mineral water, pure water industry, beverage industry, cosmetic industry, pharmaceutical industry, cooking oil industry, liquid detergent industry, etc. A bottle blow machine is essential equipment for a complete manufacturing line in many industries.
What is PET bottle blowing?
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Generally, there is a PET bottle blowing process when manufacturing a plastic bottle. And this process is usually finished by a bottle blowing machine. And there is a semi-automatic PET bottle blowing machine and a fully automatic PET bottle blowing machine. These machines can both complete the process of stretching and blowing. They have different features and advantages. If you are looking for a reliable bottle molding machine, it is necessary for you to clear your requirements.
Two Stage Bottle Moulding Machine
Performance features of Taizy PET bottle blow machine
Infrared light is mixed into the preheater to ensure that the PET bottle preform is heated evenly.
Mechanical arms are sedated to ensure that the mold is tightly closed under high temperature.
Pneumatic system consists of two parts: pneumatic acting part and blowing bottle part, in order to meet the different requirements of acting and blowing, it provides enough stable high pressure for blowing. It provides stable high pressure to blow large bottles with irregular shapes.
It is equipped with a silencer and oiling system for lubricating the mechanical parts of the machine.
Reasonable design and structure. The plastic bottle blowing machine is easy to operate and maintain.
Wide applications. It can make various PET bottles through replace different molds.
A brief introduction to plastic bottles
Today, more than 80% of bottles produced are for the beverage industry, the vast majority of which are made using two-stage technology. And the remaining 15% to 20% can choose either process and many of the decisions are actually driven by tool prices of less than 200 (m/year production is so many custom applications), and even buying four cavity single-stage tools to buy bottle perform is also difficult to prove its rationality and run on the double cavity and engine needs less capital spending In the past 10 years, the number of available bottles billet has increased dramatically all over the world. Because the performance is different from bottles, its transportation cost of it is cost-effective.
Plastic Bottles
How do PET blowing machines work?
In short, automatic PET bottle blowing machine is intelligent. Currently, linear two-step blow molding machine mainly the whole blow molding process is divided into preheating and blow molding. The specific working principle is as follows.
The whole bottle blank transfer automatic feeder loads the bottle blank into the clamping position, and the clamping fixture takes the bottle blank out and enters the heating furnace.
Through the conveyor chain. The infrared oven has two rows of horizontal red line lamps. The temperature of each tube can be adjusted by micro controller PLC. The upper and lower red line lamps are stable under constant temperature, but the height is different. At the same time, due to the high temperature environment, the temperature from the middle of the bottle blank to the bottom of the bottle is controlled by constant temperature through the dispersion tube in the chiller. As the hot air evaporates upward, the bottom temperature of the bottle is relatively low.
Blowing into the bottle. Heated preform into the clamping device for blowing hot bottle preform into the clamping device glass ware billet. With blowing, bottle preform stretching up stretch at the bottom of the stem, blow to a certain degree, low pressure blowing, blowing into high pressure at the same time. In a very short period of time, instant molding the bottle, and bottle blowing. Before gas blowing beforehand, usually installed a person. The gas passes through the filter to filter the water in the air and the oil in the lubrication of the equipment. The gas is clean and the formed bottle has no oil smell. In addition, the hot bottle blank in the mold closing device will increase the temperature in the mold, thus affecting the bottle and the equipment.
Recycle the high pressure and low-pressure gas in the excess gas bottle after blowing once, the exhaust of the gas will cause energy waste, and increase energy consumption by installing the gas recovery device, pre blowing and blowing through the one-way valve into the gas storage tank, can save 25% of the energy consumption.
Plastic Bottle Blow Machine Working Process
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