What is PET blowing machine?Two-stage technology machines with six blow moulds operating at around 4000 bottles per hour. The output was increased to 6000 bottles per hour by subsequent mould and cooling development. Two stage PET processing involves: Injection molding. Stretch blow molding is used to blow bottles.How does a blowing machine work?The process involves heating and inflating a plastic tube known as a parison or preform. The parison is placed between two dies that contain the desired shape of the product. Once the tube has been expanded by air, its walls become thinner and conform to the mold's shape.Types of PET blowing machine:Single Stage Blow Molding MachineWhile PET bottle development was happening, a major manufacturer of injection molding machines took the lead on a project to create a machine for producing biaxially oriented PP containers. They soon realized that their prototype machine could also make the new PET bottles and, in December 1975, they unveiled the One-stage ASB-150 injection stretch blow moulding machine specifically designed for this purpose. Known as classic one-stage machines, all subsequent versions of this original Stretch Blow design have been adapted for various PET developments. Its highly adaptable design allows for the production of bottles and jars of all shapes and sizes with ease.Two Stage Blow Molding MachineIn earlier stages of development, PET tubes were continuously extruded to create performs. A blow molding machine was used to heat and seal one end of the tube, then heat and shape the other end using blow moulding to create a thread finish. This method had a higher output rate of 12000 preforms per hour compared to the previous methods of using 8 or 16 cavity injection moulds. The extruded performs could also be made with multiple layers including barrier materials, but as the number of cavities increased to 32 and beyond, injection moulding took over this process. Injection moulded (IM) necks had better quality and options such as vent slots, making them more desirable. Additionally, IM technology was offered by various companies, providing customers with more technical and commercial choices. Machines using two-stage technology with six blow moulds could produce around 4000 bottles per hour, but subsequent advancements in moulding and cooling increased this output to 6000 bottles per hour.Integrated Two Stage Blow Molding MachineThe Integrated Two Stage approach involved using conventional injection moulding to create the performs, with an optimized number of cavities to match the required output. These performs were then transferred to a separate blowing machine, also with an optimized number of blow moulds. This method, known as the "integrated" approach, was the first of its kind for PET bottle making. Equipment developers, on the other hand, took a different approach by using a "single-stage" method. This meant that both the injection and blowing processes used the same number of cavities, resulting in a more compact design. This was particularly suited for smaller batch production and resulted in glossy surfaces.Features of PET blowing machineOur PET blowing machine has a unique feature in that it uses a toggle locking system rather than a hydro pneumatic system to open, close, and lock the mould. Compared to the hydraulic system provided by other pet machine manufacturers, this toggle locking system is fully pneumatically controlled. The advantages of this toggle locking system are as follows:Our pet blowing machine is fully pneumatic and as there is no hydraulic system the problems like oil leakage, less pressure, frequent change of oil seal, etc. Are not there the maintainance required is minimal.High clamping force which helps in minimizing the parting line in the bottles / jars produced from it.Machine working is faster resulting in higher production output by 60 to 70% as compared to other machines.Power saving of up to 45% as compared to other machines.Benefits of PET blowing machineThe PET blowing machine is an indispensable tool in the manufacturing industry, providing a multitude of benefits that enhance production efficiency and product quality. Firstly, this innovative machine allows for precise control over the entire bottle production process, ensuring consistent results every time. With its advanced technology and automation capabilities, it eliminates human errors and minimizes wastage by optimizing material usage. Additionally, the top blow molding machine manufacturers to produce bottles with intricate designs and shapes that were once deemed impossible. Its versatility empowers businesses to cater to diverse consumer demands while maintaining cost-effectiveness. Moreover, this cutting-edge equipment enhances productivity significantly as it can produce a large number of bottles within a short span of time compared to traditional methods. By streamlining the production process, companies can boost their output without compromising on quality standards or increasing labor costs. In conclusion, the PET blowing machine revolutionizes bottle manufacturing by offering precision control, design flexibility, increased productivity levels resulting in cost-efficiency for businesses across various industries
The COVID-19 outbreak is over, and chinaplas 2023 will be held at Shenzhen International Convention and Exhibition Center from April 17-20. Yosion will take our YUANYOU new generation 2 cavity wide neck bottle blowing machine join the exhibition, welcome new and old customers to visit negotiate! Our booth number is 4c71,I will be there.if you want to visit our companyafter the fair,we are in Taizhou city,the Yaoda hotel,Marriott hotel is very near to our company. I'm looking forward you are contacting with me.My whatsapp number is 0086-13957627151.
The preform of the automatic bottle blowing machine and its heating, pre-blowing (position, pressure and flow), stretching rod, high-pressure blowing (pressure, position) and molds will all affect the production speed of the bottle made by the blowing machine.1. PreformPreform, also known as parison, is injection molded from PET pellets. It requires that the proportion of recycled materials should not exceed 10%, and the number of recycled materials should not exceed twice. Preforms after injection molding or reheated preforms must be cooled for more than 48 hours, and the storage time of the used preforms cannot exceed 6 months. Different production dates, especially preforms with too long distances cannot be mixed. The type of raw material used in the preform, the proportion of the secondary material mixed in and the residual stress in the preform are different, and these factors have a serious impact on the molding process of the bottle blowing bottle, and should be treated in detail according to the actual situation.2. HeatingThe heating of the preform is completed by the heating furnace, which is set manually and adjusted automatically. The height of the heating furnace is preferably about 25mm, and the distance from the delivery wheel is about 19.6mm. The preform runs continuously through the entire oven on the conveying wheel, so that the preform is heated more evenly and can be shaped better, which overcomes the defects of uneven heating caused by static heating and manual rotation in the past. However, if the heating furnace is not adjusted properly, the wall thickness of the blown bottle will be unevenly distributed up and down (for example, the top is light and the bottom is heavy), the bottle mouth will become larger than the standard, hard neck and other product defects, and even cause torsion failure of mechanical parts. The temperature of each area can be adjusted in detail according to the molding status of the product, and at the same time, the opening status of the oven lamp tube should be considered. In addition, the setting of the output power of the oven also has a great influence on the heating of the preform, which controls the heat output of the entire oven. When the pet bottle blowing machine is not turned on for a long time, when it is turned on again, the initial output power should be set higher accordingly, and then gradually reduced to the normal state during normal consumption. The output power is generally about 80%, especially when the ambient temperature is below 5°C. The effect is more significant.The bottle blowing production process also has a certain relationship with the production environment temperature. The ambient temperature is generally room temperature (about 22°C). If the temperature is too high, the product is prone to condensation point agglomeration; if the temperature is too low, the product performance will be unstable when the automatic pet bottle blowing machine is started, and the specific operation should be adjusted according to the actual situation and experience.3. Pre-blowingThe role of pre-blowing in the blowing process is to make the preform take shape, and at the same time, it is stretched longitudinally by the stretching rod to increase its longitudinal strength. The whole process is that the pre-blowing cam pushes the three-way valve to the pre-blowing position during the blowing process, and is completed by the one-way valve. Pre-blowing position, pressure and flow can all affect the quality of the bottle.Position: If the pre-blowing position is advanced, the center point of the bottom of the bottle will be skewed and thinned, the wall thickness of the feet will be uneven and whitish, the top is heavy and the bottom is light, the neck will be hard, and the bottom will penetrate. There will be defects such as light on the top and heavy on the bottom, thickening of the center point, and depression.Air flow The pre-blowing air flow is controlled by a one-way valve, and it is generally advisable to open 3-4 turns. The air flow is large, the bottom is heavy, the center point is thin and biased, the feet are white, and the wall thickness is uneven; the air flow is small, the center point becomes thicker, and the weight of the segment exceeds the standard.Pressure: The pre-blowing pressure is preferably 0.8-1MPa. When the pressure is high, it may cause the top to be heavy and the bottom to be light, the center point is skewed, the wall thickness of the foot is uneven, white, etc.; when the pressure is low, it cannot be fully stretched, the bottom is heavy, and the center point is thick.The shape of the bottle foot and center point has a great influence on the quality of the bottle. Improper adjustment often leads to fatal defects such as bottle bursting (under normal test conditions) and leakage.4. Stretch rodThe stretching rod is a device that stretches the heated preform under the cooperation of pre-blowing at the same time as pre-blowing. It resets after high-pressure blowing and before exhausting. The stretch rod must be able to move vertically and smoothly during the blowing process, the driving pressure is 0.55-0.8MPa, and the gap with the bottom mold is 2.3-2.5mm, that is, the thickness of the preform is 1/3-1/2. If the gap is too large, the center point of the bottom of the bottle will shift; if the gap is too small, the center point will become thinner.5. High pressure blowingThe function of high-pressure blowing is to fully stretch the molten material and cling to the mold wall to fully shape the bottle, and at the same time carry out transverse stretching to improve its transverse strength. The main influencing factors are position and pressure.The high-pressure blowing pressure is generally 3.7-4MPa, which is determined by its molding characteristics and the nature of the filled beverage (carbon dioxide). There are two positions, that is, the position of high-pressure gas and the position of exhaust. The time between the two is the holding time during molding. The length of this time has a great influence on the stability of the bottle capacity. Insufficient high-pressure air can easily cause improper bottle molding and insufficient foot blowing.6. MoldThe mold is one of the important elements affecting the blow molding of the bottle. The body of the bottle is a half mold, and the bottom of the bottle is independent, which is a typical blow mold. During the production process, the mold must be kept at a constant temperature, clean, and the vent hole should be unblocked.When the heating and cooling system of the mold fails, there will be defects such as bottle neck skew, bottle tilt, volume and height changes, and bottom weight; maintaining a constant temperature of the mold can also prevent condensation on the surface of the mold.
1. Problems with automatic blow molding machine parts. The barrel screw of blow molding machine has been used for a long time, and damage gaps have occurred. There are material dead corners in the gaps. During the production process, the previous batch of raw materials of different colors slipped, resulting in continuous color difference problems in the finished product. In this way, it is necessary to check to see the size of the damage problem, and choose to repair or replace the screw.2. The problem of raw materials and color masterbatchControlling raw materials is the key to solving chromatic aberration. If all new materials are used in full and the parameter temperature is well controlled, the color difference of the finished product caused by the raw materials is basically unlikely. If the recycled materials are added, the finished product will appear due to the color value of the recycled materials and uneven stirring during the mixing process. Color difference problem. If adding recycled materials in production, it is necessary to adjust the addition ratio and stirring time according to the performance of recycled materials to ensure uniform raw materials and reduce color difference of finished products. When using color masterbatch, strengthen the inspection of raw material warehousing; in production, the same product should be produced by the same bottle blowing machine manufacturer, masterbatch and color masterbatch of the same brand as much as possible. If it is necessary to change the color masterbatch manufacturer, do a small sample test, and only after meeting the standards can mass production begin.The semi-automatic bottle blowing machine needs to manually remove the flashing, while the automatic plastic blowing machine realizes automation and directly produces the finished product, eliminating the need for labor in the middle to remove the flashing. Labor is saved. In the case of the same energy consumption, energy saving and high efficiency. The product is of good quality and the mouth of the bottle is smooth. There will be no overflow after the cover is put on, which improves the qualified rate of the product. Orders will not be lost because of unqualified products, which will damage the company's reputation. Of course, if your company's product demand is small and you are just starting this industry, you can choose a semi-automatic bottle blowing machine.Everyone may be very familiar with the bottle blowing machine, which is mainly used to blow bottles. The bottle blowing machine mainly blows plastic particles or softened liquids through certain technological means to become what people need. Bottles, compared with other raw materials, plastic hollow containers are not only light in weight and cheap, but also very high in safety. They can be seen everywhere in our lives, especially in various beverage bottles used at home. It is made of plastic, which brings more convenience to people, but what preparations should people make before using the 2l bottle blow molding machine?1. Before using the bottle blowing machine, you should carefully check whether the moving parts are firm, and you should also carefully check whether the screws are loose. If so, you should tighten them in time to ensure safety and stability during use. .2. For places with very strong impact, it is necessary to check whether the belt transmission part is normal and whether there is serious wear and tear. It needs to be replaced and processed, and it is also necessary to add lubricating oil to each part to ensure the service life of the mechanical equipment. longer.Maintenance of the bottle blowing machine in a certain order can not only ensure the normal production of the product, but also prolong the service life of the machine and equipment. Therefore, regarding the maintenance of the bottle blowing machine, the following maintenance rules must be correctly implemented to improve product quality and productivity.1. When the blow molding machine fails, it must be repaired as soon as possible. If it can be repaired during power failure or product replacement operation, it will help reduce downtime and will not delay machine production.2. For the parts that affect the blowing quality of the pet blow molding machine, they need to be replaced or repaired every six months. If there are parts that do not affect the quality of bottle blowing, they can be used for a longer period of time, which can reduce maintenance costs.3. If it is necessary to repair a large area of the blow molding machine, it is best to choose to repair it together when the glass furnace is being repaired, so as to avoid the shutdown of the blow molding machine during the production process.