Therefore, it is necessary to adjust: stretching start timing, stretching speed, pre-blowing start and end timing, pre-blowing pressure, pre-blowing flow, etc. 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. The blowing process includes stretching-blowing once-blowing twice. 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 PET exhibits a highly elastic state in this interval and becomes a transparent bottle after rapid blow moulding and cooling, and setting. The wall thickness of the preform should not exceed 4.5mm.īlowing is carried out between the glass transition temperature and the crystallization temperature, generally controlled between 90 and 120 degrees. It is necessary to control the stretch-inflation ratio:ĭo not exceed 3.5-4.2 in the radial direction and 2.8-3.1 in the axial direction. It has good airtightness.Īlthough stretching helps to increase strength, it should not be overstretched. It improves the tensile, tensile, and impact strength. In this process, the PET chain is extended, oriented and arranged in two directions, which increases the mechanical properties of the bottle wall. The blow moulding machine process of the bottle blowing machine is a two-way stretching process. 5D/12D/20D Double Station Blow Molding Machine The process flow of the bottle blowing machine Significantly accelerate the rate of production. 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. 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. 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. Warm-upĪn infrared high-temperature lamp irradiates the preform to heat and soften the preform. The blowing process of the bottle blowing machine is divided into two parts. The principle of the bottle blowing machine
0 Comments
Leave a Reply. |