As we all know, bottle blowing machines and blow molding machines are two kinds of equipment that people often confuse. Many people think that these two devices are the same machine, but they are really different. This article will take everyone to understand the difference between the blow molding machine and the bottle blowing machine.
The Difference Between A Blow Molding Machine And Bottle Blowing Machine
The Working Principle Is Different
The production process of the blow molding machine is extrusion-injection-stretching-blow molding, and the blow molding machine is a one-step blowing method and a two-step blowing method.
The Production Items Are Different
The blow molding machine refers to the machine that blows the bottle. The production of the blow molding machine is convenient and convenient, and the molding volume is large. It mainly injects the tubular blank into the mold to inflate and mold the tube wall into a bottle shape. The blow molding machine requires the plastic to be melted and extruded quantitatively in the screw extruder, formed through the mouth film, and then cooled to obtain a complete product. It is more used to produce large barrels or warning columns, trays, floating barrels, etc. An irregular blow-molded product.
The Characteristics Are Different
The blow molding machine has the characteristics of high thickness, corrosion resistance, and wear resistance. The die head also adopts a chrome-plated screw mandrel structure to make the unloading more uniform and smooth and to better complete the blown film. The complex film-blowing machine structure makes the output gas more uniform. The lifting unit also adopts a square frame structure, which can be carried out according to production needs to adjust.
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Introduction Of Blow Molding Machine
What Is A Blow Molding Machine？
The blow molding machine is a kind of plastic machine processing equipment. After the liquid plastic is sprayed out, the wind force blown out by the machine is used to blow the plastic body into a mold cavity of a certain shape to make a product.
There are two commonly used extrusion blow molding machines and injection blow molding machines for plastic blow molding machines. The basic principle of these two kinds of equipment is basically similar, both are to add the resin into the extruder first, melt and then blow to obtain the finished product.
However, they are different in that the extrusion blow molding machine process is extrusion-stretch-blow molding, and the injection blow molding machine process is injection-stretch-blow molding.
What Is The Blow Molding Material Of The Blow Molding Machine?
Blow molding machine blowing materials can choose polyethylene, polyvinyl chloride, polypropylene, polystyrene, linear polyester, polycarbonate, polyamide, cellulose acetate, polyacetal resin, etc. The capacity of the produced products can range from a few liters to thousands of liters, and the made high-density polyethylene products can be widely used in food, chemical, and liquid packaging.
Advantages Of Blow Molding Machines
The advantage of the blow molding machine is that the plastic container processed by the blow molding machine has a high thickness, corrosion resistance, and wear resistance, and can replace a part of the ceramic container. In addition, the container cost of blow-molded products is low, the processing is complex and the efficiency is high.
Introduction Of Bottle Blowing Machine
What Is A Bottle Blowing Machine？
As the name suggests, the bottle blowing machine is a machine for producing bottles. It is also called bottle making machine. It softens plastic particles into liquid and then blows them into different bottles through the preform melt. The standard bottle-blowing machines include extrusion blow molding machines, and injection blow molding machines There are three kinds of bottle machines and blow molding machines with special structures.
The Working Principle Of The Blow Molding Machine
The blowing process is also divided into a one-step blowing method and a two-step blowing method. Most commonly use the two-step blowing method. The principle is to preheat and soften the preforms through infrared high-temperature lamps and prevent the preheated preforms from blowing. Put it into the finished mold, inflate it under high pressure, and blow it into the desired shape.
The blow-drawing process is a two-way stretching process, so in order to increase the mechanical properties of the bottle wall and increase the tensile, tensile, and impact strength during this process, the PET chains are bidirectionally extended and arranged. This stretching is also limited, and it cannot be stretched too much. It is necessary to control the stretching and blowing ratio.
