Bottle blowing machine for you about today is how to develop. In history, Enoch Ferngren and William Kopitke first blow molding processing technology was verified. The principle of this process is derived from blown glass products. In 1938, Edible oil filling machine Ferngren and Kopitke created a bottle blowing machine and sell it to the company the Hartford empire. This is the beginning of commercial blow molding processing technology. In the 1840 s, the varieties of plastic products and quantity are very limited, therefore, blow molding process until very late get rapid development. With the improvement of increasing product variety and productivity, blow molding process of plastic products more and more quickly. In the soft drink industry in the United States, the number of plastic containers from zero in 1977 has been increased to 1999 in 10 billion.
Blow molding process during the second world war, start small bottles used in the production of low density polyethylene. The birth of the late 50 s, with the high density polyethylene and the development of the blow molding machine, blow molding technology has been widely applied. The volume of the hollow container can amount to thousands of liters, some production has adopted computer control. Suitable for blow molding of plastics such as polyethylene, PVC, and polypropylene, polyester, the income of empty container is widely used in industrial packaging container.
According to the parison producing method, blow molding, Vegetable oil filling machine blow molding can be divided into the extrusion blow molding and injection of new developed a multi-layer blow molding and stretch blow molding.
After the extrusion process is to put the plasticizing plastic originally by screw extrusion to crowded blowing die head, coupled with the following mold and molding of compressed gas to achieve products.
Blow molding process has three parts: the tensile - a blow - second, because of the three process time is short, so be sure to cooperate in place, especially in the first two steps according to the overall distribution of the material, CSD filling line so here's the blow molding machine quality. Therefore the following several factors to adjust good: tensile start time, drawing speed, blowing the start and end time, pressure and flow rate in the process of the blow spread best can control the temperature of the whole bottle embryo bottle embryo, both inside and outside wall temperature gradient.
Is a process of two-way stretch blow molding process, in this process, and put the PET chain is two-way stretch, orientation, and then increase the mechanical properties of the bottle wall, increased the tensile, tensile, impact strength, and has good air tightness. Bottle preform thickness not overstepping hollow blow molding machine 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 quickly become transparent mold after blow molding, cooling setting. In one-step method, the temperature is by injection molding process of the cooling time length of hollow blow molding machine of choice, so be well matched note - two worktables of contact.