Plastic Blow Moulding Machine: Basic Knowledge
In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding.
The blow molding process begins with softening plastic, by heating, and forming it into a parison or, in the case of injection and injection stretch blow molding (ISB), a preform. The parison is a tube-like piece of plastic with a hole in one end through which compressed air can pass.
The parison is then clamped into a mold and air is blown into it. The air pressure then pushes the plastic out to match the mold. Once the plastic has cooled and hardened the mold opens and the part is ejected. Water channels within the mold assist cooling.
What are the advantages of automatic blow moulding machine?
1:Toggle balance clamping structure, with platen opening & clamping and mold platen movement by linear guide, to achieve low friction and high speed.
2:Based on the Finite Element Analysis design, and platen, toggle and platen frame made in high intensity nodular cast iron.
3:High speed mold clamping oil cylinder with differential speed function, and high speed mold moving cylinder with special anti-shock cushion valve structure.
4:Specially designed screw with high L/D ratio insures good plasticizing and stable extrusion; high precision and no part line die head guarantees customers’ top quality requirement.
5:Multi-screw & multi-die head can be adopted to improve the quality of the product and lower down the cost of material.
6:Multiple-way PID controlled temperature heating is precise and stable.
How does a plastic blow moulding machine work?
The process involves heating a plastic tube to its melting point and then putting that into the cavity of a mold. They then use compressed air to inflate the molten plastic like a balloon so that it takes the shape of the mold but is hollow inside.
What are the applications of bottle blow molding machine?
Our common lubricating oil barrels, stacking barrels, playground plastic toys, playground plastic slides, bottles, cans, barrels, pots, hollow seats, and special-shaped hollow products are all made by blow molding machines. The application industry of blow molding machine is relatively wide, such as the common daily cleaning products industry, food and beverage packaging industry, chemical stacking barrel industry, medicine bottles and pesticide bottles in the pharmaceutical industry, etc.
As one of the blow molding machine manufacturers, Powerjet provide high quality china bottle blow molding machie. Contact us for more details!