The working principle of the plastic blow moulding machine involves forming a tubular parison through the extrusion process of thermoplastic plastics, and then injecting compressed air into the parison to expand and fit to the inner wall of the mold, and then cooling to obtain the desired hollow plastic product.
First, the plastic particles are melted under the heating of the extruder and the push of the screw, and are extruded through the die head to form a tubular parison. At this time, the parison is in a thermoplastic state and can be formed by blowing compressed air into it through the blowing system. The injection of compressed air causes the parison to expand and fit closely to the inner wall of the mold to form a hollow product of the desired shape. Subsequently, the temperature of the parison is reduced by the cooling system, so that the plastic solidifies and maintains its shape. Finally, the mold is opened to take out the molded plastic product, completing the entire blow molding process.
Advantages of Blow Moulding Machine
The advantage of blow moulding machine is that they can be produced continuously, suitable for large-scale production, and can produce hollow plastic products of various shapes and sizes. In addition, since the parison is formed in a thermoplastic state during its production process, many different types of thermoplastics can be used, such as polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET). These materials have good chemical stability and low temperature resistance, so that the final product can be used in a variety of environments.
Blow Moulding Machine Application
Plastic blow moulding machines are widely used, from small medical containers to large storage tanks, which can be manufactured by this technology.
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