The two-step blow molding machine, also known as the two-step fully automatic blow molding machine, has different blowing processes and procedures compared to the one-step blow molding machine. The two-step blow molding machine reduces one step of the process, increasing the efficiency and output of blow molding by at least twice. Many blow molding companies continue to introduce new two-step blow molding machines, which quickly gain recognition from users. The two-step bottle blowing machine has been widely used in PET plastic bottles such as mineral water bottles, beverage bottles, pesticide bottles, and edible vinegar bottles.

Two step blowing process and principle of bottle blowing machine

The two-step bottle blowing machine is completely different from the one-step bottle blowing process. The two-step bottle blowing machine uses a series of actions such as heating, stretching, low-pressure pre blowing, and high-pressure bottle blowing to inject PET crystals into preforms. It can be roughly divided into two main parts

1. Preheating

The preform is transported through a conveyor chain to the heating oven, and heated by rotating the bottle base to ensure that the preform is heated to 80-120 degrees. After reaching the temperature, the PET preform becomes highly elastic and is quickly pulled and blown into shape.

2. Blow bottle

The blowing process may seem short, but it goes through one stretching, two stretching, low-pressure pre blowing, high-pressure pre blowing, rapid mold closing, secondary mold closing of the airbag board, and finally blowing into a bottle.

Two step bottle blowing machine manufacturer recommendation:

At present, there are many manufacturers of two-step bottle blowing machines in China, mainly concentrated in the Huangyan area of Zhejiang Province. However, with the development of the industry in recent years, many Huangyan bottle blowing machine manufacturers have unstable quality and untimely after-sales service, and have a particularly good reputation in the industry. The price of two-step bottle blowing machines in Guangdong is relatively high, which general water companies and plastic factories cannot afford. In Henan, two-step bottle blowing machines are mainly represented by Shangqiu Tengyue bottle blowing machines, which have high industry recognition and reasonable prices.

Price of two-step bottle blowing machine

The prices of two-step bottle blowing machines vary from manufacturer to region, with specific and detailed prices Click to view

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