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Working principle of Blow moulding machine
- Mar 02, 2018 -

Working Principle of Blow Molding Machine



Blow molding machine also called hollow blow molding,is a rapid development of plastic processing methods.

Blow molding machine is the liquid plastic spray out, the use of the wind blowing out of the machine, the plastic body blown to a certain shape of the mold cavity, thus making products of the machine.





Blow molding machine can be divided into extrusion blow molding machine, injection blow molding machine and special structure blow molding machine three categories.




Hollow forming machine, mainly by the extruder, nose, hydraulic system, clamping system, electrical control system, inflatable system, automatic clamping and other parts, for blowing PE and other kinds of materials hollow products. such as: square barrels, drums, beer preservation containers, toolbox, lampshades and so on. The machine has the characteristics of high performance, low energy consumption and simple operation.




At present, the high-grade hollow machine in the market is a combination of our national conditions, research and development of a leading domestic update products, the selection of high-quality hydraulic components, the use of PLC control, the most advanced first-out type of storage head, in the original advantages of the traditional hollow machine, coupled with today's most advanced technology, its performance more excellent and reliable.


High efficiency and applicability has reached the level of similar products in Japan and Germany. It can be said that the grade of products, will be more and more advanced. Because the market demand, quality requirements are relatively high. And will continue to renovate, constantly have a twist.


Tubular plastic billets obtained by extrusion or injection of thermoplastic resins, hot (or heating to soften the state), placed in the open mold, immediately after the closed mold in the form of compressed air, so that the plastic billet blowing and close to the mold wall, after cooling demoulding, that is, a variety of hollow products.


Blow molding Film manufacturing process in principle and blow molding hollow products very similar, but it does not use molds, from the plastic processing technology classification of the angle, blow molding film molding process is usually included in extrusion. Blow molding Process In the Second World War, began to produce low-density polyethylene vials. In the late 50, with the birth of high-density polyethylene and blow molding machine development, blow molding technology has been widely used. The volume of hollow containers can reach thousands of liters, and some production has been controlled by computer. Suitable for blow plastic polyethylene, polyvinyl chloride, polypropylene, polyester and so on, the resulting empty containers are widely used as industrial packaging containers.




According to the production method of Parison, blow molding can be divided into extrusion blow molding and injection blow molding, the new development of multi-layer blow molding and stretch blow molding.


Blow molding machine can be heated to the molding of preformed products, and then into the mold blow molding, this method is mainly used for high-speed and high production of pet bottles and Bopp bottle production, that is, two-step process, blow molding can also be combined with injection molding process into a pull-blow machine, which is also the production of pet containers commonly used methods Plastic in the screw extruder is melted and quantitatively extruded, and then formed through the mouth film, and then the wind ring cooling, and then the traction machine at a certain speed traction, winding machine winding it into a volume.


The liquid plastic spray out, the use of the wind blowing out of the machine, the plastic body blown to a certain shape of the mold cavity, thus making products, this machine is called blow molding machine. The plastic billet is hot in the open mold, after the closed mold immediately in the mold into the compressed air, so that plastic parison blown and close to the mold wall, after cooling demoulding, that is, a variety of hollow products. Blow molding Film manufacturing process in principle and blow molding hollow products very similar, but it does not use molds, from the plastic processing technology classification of the angle, blow molding film molding process is usually included in extrusion.


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