Wide mouth bottle blowing machine is divided into two control systems, one is controlled by time relay, the other is controlled by PLC touch screen computer, which can control technical parameters more accurately. The wide mouth bottle blowing machine is simple and safe to operate. The double emergency stop operation at different positions, as well as the single point start button and double point start button at different positions, make the operation of the bottle blowing machine convenient for operators. The wide mouth bottle blowing machine only needs one person to operate without special training. Wide mouth bottle blowing machine has special high and low pressure gas storage device, and users can supply gas from single or double gas sources. The clamping device is clamped with double crank. The advantages are large clamping force, simple machine installation and simple operation and maintenance by operators.
The blow molding process of the wide mouth bottle blowing machine is a biaxial stretching process. In this process, the PET chain extends, orients and arranges in two directions to increase the mechanical properties of the bottle wall and its tensile, tensile and impact strengths, and the sealing performance is very good. Stretching helps to increase strength, but it should not be overstretched, and the stretching expansion ratio must be controlled.
Blow molding is carried out between the glass transition temperature and the crystallization temperature, usually between 90 and 120 degrees. In this gap, PET presents a very elastic state, and becomes a transparent bottle after rapid blow molding, cooling and curing of wide mouth bottle blowing machine. In the one-step method, the temperature is determined by the length of cooling time in the injection molding process, so it is necessary to link the relationship between the injection station and the blow molding station of the wide mouth bottle blowing machine.
The blow molding process of wide mouth bottle blowing machine: one blow molding stretch, two blow molding. These three movements are very short, but they need to be well coordinated. Specifically, the first two steps determine the overall distribution of materials and the quality of bottle blowing. Therefore, it is necessary to adjust the stretching start time, stretching speed, pre blowing start and end time, pre blowing pressure, pre blowing flow, etc. The wide mouth bottle blowing machine controls the overall temperature distribution of bottle preforms, the temperature gradient between bottle preforms, and the inner and outer walls of preforms.
In the rapid blow molding and cooling process of wide mouth bottle blowing machine, induction stress will be generated on the bottle wall. For inflatable beverage bottles, it is beneficial to bear internal pressure, but for hot filled bottles, it is necessary to ensure that they are completely released above the glass transition temperature.