Blow molding machine | Machinery is a professional manufacturer of blow molding machines
The PET bottle blowing machine is mainly used for blowing PET plastic material. It is completed by a series of actions such as feeding, heating, conveying, stretching, and clamping. The one-step PET blow molding machine blow molding process is a two-way stretch In this process, the PET chain is bidirectionally extended, oriented and arranged, thereby increasing the mechanical properties of the bottle wall, improving the tensile, tensile, and impact strength, and has excellent air tightness. Although stretching helps to increase strength, it should not be overstretched, and the stretch-inflation ratio should be controlled well. Blowing is carried out between the glass transition temperature and the crystallization temperature, usually between 90 and 120 degrees. In this interval, the PET exhibits a highly elastic state, and it becomes a transparent bottle after being rapidly blown and cooled and shaped. The blow molding process includes: stretch-blow once-blow twice. The three actions have a short time, but they must be well coordinated, especially the first two steps determine the overall distribution of the material and the quality of the blown bottle. Therefore, it is necessary to adjust: stretch start timing, stretch speed, pre-blowing start and end timing, pre-blowing pressure, pre-blowing air flow, etc. If possible, it is best to control the overall temperature distribution of the preform, inside the preform The temperature gradient of the outer wall. In the rapid blowing and cooling process, induced stress occurs in the bottle wall. For gas-filled beverage bottles, it can resist internal pressure and has advantages, but for PET bottle blowing machines, it is necessary to ensure that it is fully released above the glass transition temperature. The PET bottle blowing machine features the separation of the drying tunnel and the blowing platform, which reduces the mold opening time, improves the blowing efficiency, and increases the output at the same time. 1. The compact exterior design reduces space, reduces production costs, and enhances competitiveness. 2. Automatic operation system. 3. Advanced control system, simple and convenient control panel. 4. Independent and simple linear operation system. 5. Unique heating system, precise temperature control and easy adjustment. 6. Unique storage device. 7. The cooling system of the PET bottle blowing machine can achieve the ideal cooling effect. Characteristics of PET raw materials: PET raw materials are milky white or light yellow, highly crystalline polymers, smooth and shiny in appearance. It has excellent physical machine functions in a wide temperature range, and the long-term use temperature can reach 120°C. The electrical insulation is relatively good, and the motor can still work normally under high temperature and high frequency, but the corona resistance is poor, creep resistance, fatigue resistance, friction resistance, and dimensional standards are all very good.
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