What is the difference between Bottle Blowing Machine and Blow Molding Machine?

Blow Molding Machine Introduction:

Blow molding machine is a plastic machine processing equipment, the liquid plastic sprayed out, the use of the machine blows out the wind, the plastic body blow attached to a certain shape of the mold cavity, made of products.

Plastic blow molding machine commonly used in two kinds of extrusion blow molding machine and injection blow molding machine, the basic principle of the two types of equipment is basically similar, are first added to the resin in the extruder, melted and then blown to obtain finished products.

The difference is that the extrusion blow molding machine process is extrusion – stretching – blow molding, injection blow molding machine process is injection – stretching – blow molding.

Blow molding machine blowing materials can be selected from polyethylene, polyvinyl chloride, polypropylene, polystyrene, linear polyester, polycarbonate, polyamide, cellulose acetate and polyacetal resin.

The capacity of the products produced can range from a few liters to thousands of liters, and the HDPE products produced can be widely used in food, chemical and handling liquid packaging.

Polyvinyl chloride is used more in the cosmetic and laundry industries because of its high transparency and air tightness, and in food containers and gas beverage packaging.

The advantage of blow molding machine is that the plastic containers processed by blow molding machine have high thickness, corrosion and abrasion resistance and can replace some of the ceramic containers, in addition to the lower cost of blow molded containers, low processing difficulty and high efficiency.


Bottle Blowing Machine Introduction:

Bottle blowing machine as the name suggests is a machine for producing bottles, softening plastic particles into liquid and then blowing them into different bottles through well made PET preforms.

In the blowing process is also divided into one-step blowing method and two-step blowing method, most of the common use of two-step blowing method, the principle of preheating the PET preform through the infrared high-temperature lamp to soften the PET preform, the preheated PET preform has been placed into a good mold, the high-pressure inflation, blowing and pulling into the desired shape.

The blowing and drawing process is a two-way stretching, so in this process, in order to increase the mechanical properties of the bottle wall, increase the tensile, tensile and impact strength, the PET chain is extended and arranged in two directions. This stretching is also a limit, not over-stretching, need to control the stretching blowing ratio.

The blowing machine produces containers with lower price and higher safety, so it is mostly used instead of glass containers in beverage, pharmaceutical, cosmetic, food processing and other industries.

The difference between one-step blowing method and two-step blowing method:

Blowing machine is a machine that blows recycled plastic or well-made bottle embryos into empty bottles according to a certain processing process way. The production method of blowing machine is two-step method and one-step method.

PET preform

In the two-step blowing machine, the raw plastic material is first made into a bottle preform, and then the blowing process is carried out. In between there are stages of manual work and storage and shipment of the blanks.

The one-step blow molding machine performs the detailed production process from blank injection to injection molding in one machine at one time, without the need for secondary heating, saving energy.

The difference between blow molding machine and bottle blowing machine.

1.Different principle. The above will be the working principle of the two mechanical equipment are detailed can be clearly seen that the two plastic production principle there are certain differences, blow molding machine production process for extrusion / injection – stretching – blow molding, bottle blowing machine for a step blowing method and two-step blowing method.

2.The production of different items. Bottle blowing machine is the machine that blows the bottle, blow molding machine production is convenient and convenient, forming a large amount, mainly tubular embryo or injection molding to the mold in order to blow expansion, tube wall paste mold into a bottle. Blow molding machine, on the other hand, requires plastic in the screw extruder is melted and quantitative extrusion, through the mouth film molding, and then through cooling to obtain the complete product, more often used to produce large barrels or warning columns, trays, floating barrels and many other irregular blow molding products.

3.Different characteristics.Blow molding machine with high thickness corrosion resistance, wear resistance, etc., the die head also uses chrome-plated screw mandrel structure to make the unloading more equal and smooth, better completion of the blown film, complex film blowing machine structure makes the output of the gas more uniform, lifting unit also uses a square frame structure, can be adjusted according to production needs.

Scroll to Top