The bottle blowing bottle blowing machine principle and technological process
At present most of the bottle blowing machine or two footwork bottle blowing machine, namely must first plastic raw materials to make bottle embryo, then blowing. Nowadays environmental protection plastic PET material is usually used. One, the principle of bottle blowing bottle blowing process of bottle blowing machine is divided into two parts, preheat the bottle preform (1 Embryo) Through the infrared heat lamp irradiation, the bottle preform, Embryo) Bad ( Embryo) Body soften some heat, in order to keep the bottle shape, bottle preform ( Embryo) Mouth is don't need to be heated, so you need a cooling device for cooling operations. 2, bottle blowing molding the stage is already preheated bottle preform ( Embryo) Place is ready to blow mold, for its high pressure gas. Put the bottle preform ( Embryo) Blown into a bottle as needed. Automatic bottle blowing machine through the operation of the manipulator will bottle blowing two operations together to complete, from the middle of artificial will be preheated bottle preform in the blow mold process. Greatly accelerated the rate of production. Bottle blowing machine molding process flow diagram 2, bottle blowing machine bottle blowing machine is a process of two-way stretch blow molding process, in this process, PET chains are arranged two-way stretch, orientation, and, thus increasing the bottle wall mechanical performance, can improve the tensile, tensile, impact strength, and has good air tightness. While stretching helps to improve the strength, but not excessively stretching, to control good stretch blow ratio: radial not more than 3. Five to four. 2, the axial not more than 2. 8 ~ 3. 1. The bottle preform thickness not more than 4. 5mm。 Bottle blowing is between the glass transition temperature and crystallization temperature, general control between 90 ~ 120 degrees. PET show is within the range of the high elastic state, blow molding, cooling rapidly become transparent bottle after setting. In step method, the temperature is determined by the cooling time length in molding process ( Such as aoki bottle blowing machine) , so be well matched note & ndash; The relationship between the two stations. Tensile & ndash; blow molding process are: A blow & ndash; Second blow, three action time is very short, but be sure to cooperate well, especially the former two step determines the overall distribution of the material, by the quality of bottle blowing. So to adjust good: stretch the starting time, stretching rate, blow the start and end time, air pressure, blowing air flow, etc, if possible, best can control the temperature of the bottle preform general distribution, bottle preform, both inside and outside wall temperature gradient. In the process of blow molding, cooling rapidly, bottle wall has induced stress is generated. For filling bottles, it can be resistance to internal pressure, is good, but for hot filling bottles have to make sure it fully above the glass transition temperature for release.
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