At present, the equipment for producing extruded hollow containers in China can fully meet the needs. Therefore, currently, the main users of two-step equipment in China are professional PET bottle manufacturers, while one-step equipment is mainly used by beverage manufacturers such as Kangshifu and Wahaha. For example, their extrusion and blowing equipment has formed an equipment sequence, which can produce various specifications of blow molded containers below 200L. They have also developed an in mold labeling extrusion and blowing molding machine, which is widely used in fields such as cosmetics and lubricants.

Hollow container forming machine

【 Haochen Hot Runner 】 Blow molding is a commonly used method for manufacturing hollow thermoplastic products, mainly including cylindrical membranes and hollow containers.

The one-step and two-step blow molding processes are mainly used for the molding of PET and BOPP hollow containers. The two-step method is more suitable for the bottle factory production mode of centralized production of preforms and dispersed blowing of bottles; And one-step equipment is more suitable for online production of beverage enterprises. Both have their own characteristics and are widely used.

The equipment for producing extruded hollow containers has stronger adaptability to materials, and can produce containers made of various materials such as PE, PS, PVC, PC, etc. The application fields of the products are also wider. Blow molding machines can plasticize pre formed products by heating them and then blow them into molds for molding. This method is mainly used for the production of high-speed and high-yield PET bottles and BOPP bottles, which is a two-step process; Blow molding can also be combined with injection molding technology to become an injection pull blow integrated machine, which is also a commonly used method for producing containers in PET; The blow molding process can also be combined with the extrusion process, and the application range of extrusion blow molding equipment is wider. The products that can be produced are also more abundant, including multi-layer composite films and various types of polyolefin hollow containers, which are widely used in the food, pharmaceutical, and cosmetic industries. Squeezing method can produce several milliliters of eye drops, as well as process pallets or ton barrels of over 1000L.

With the rise of cold sterile filling technology, a new round of market competition for bottle blowing machines will be launched.

However, the extrusion and blowing equipment currently developed in China is not yet fully functional, especially some equipment with multiple composite functions that cannot be produced, such as the bottle making, filling, and sealing three-in-one equipment widely used for liquid drug packaging. Three quarters of blow molded products on the market are manufactured by the extrusion blow molding method. It is worth mentioning that there are currently few manufacturers capable of producing large capacity PET hot filling bottle blowing machines, and it seems that only ASB's multiple blowing process has achieved satisfactory results.

At present, the injection, pulling, and blowing equipment used in the production of PET bottles in China is mainly imported products, especially in the production of high-speed and large volume products. Domestic equipment is still unable to compete. PET bottle blowing machines are divided into two types according to the conveying method of bottle preform heating: rotary type and linear type.