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What is the processing process of automatic blow molding machine
Edit:Taizhou Huangyan Yige Machinery Co., Ltd.   UpDate:2018-11-29

First, warm up

The preform (embryo) is irradiated with an infrared high temperature lamp, and the preform (embryo) body of the preform (embryo) is heated and softened. In order to maintain the shape of the bottle mouth, the preform (embryo) mouth does not need to be heated, so it needs to be heated. It is cooled by a certain cooling device.

Blow molding

In this stage, the preforms (preforms) that have been preheated are placed in a blow mold that has been prepared, and the high-pressure inflation is carried out to blow the preforms (preforms) into the required bottles.

Bottle blowing machines on the market are generally divided into two types: fully automatic bottle blowing machines and semi- automatic blowing machines . The fully automatic bottle blowing machine completes the two operations of bottle blowing together through the operation of the robotic hand, eliminating the process of manually putting the preheated preform (preform) into the blowing mold in the middle. Greatly speed up the production rate, of course, the price is higher than the semi-automatic.

Enoch Ferngren and William Kopitke first invented the blow molding process. The principle of this process is derived from glass blowing. In 1938, Ferngren and Kopitke built a blow molding machine and sold it to Hartford Empire. This is the beginning of a commercial blow molding process. In the 1840s, the variety and quantity of plastic products were very limited, so the process of blow molding did not develop rapidly until very late. With the increase of product types and the increase of productivity, more and more plastic products made by the blow molding process soon. In the U.S. soft drink industry, the number of plastic containers has grown from zero in 1977 to 10 billion in 1999.

The blow molding process was used to produce low-density polyethylene vials during World War II. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology was widely used. The volume of the hollow container can reach thousands of liters, and some production has been controlled by computer. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc. The hollow containers obtained are widely used as industrial packaging containers.

According to the parison manufacturing method, blow molding can be divided into extrusion blow molding and injection blow molding. Newly developed are multilayer blow molding and stretch blow molding. The extrusion process is to extrude the plasticized plastic into an extrusion blow die through a screw, and then cooperate with the following mold and compressed gas to achieve product molding.

The extrusion blow molding process consists of 5 steps:

1. Plasticized raw materials are made from plasticized raw materials;

2.Take part of the parison and cut off the parison by closing the mold;

3. Fill the mold cavity with gas to shape the parison and cool;

4. Open the mold and take out the formed container;

5. Trim the flash to get the finished product.


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