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  • The blow molding is a method which clamps a cylindrical material called “parison” with split molds and blows air inside to blow it up and press it onto the inner wall of the die. It is an important industrial process for making one-piece hollow plastic parts with thin walls, such as bottles and similar containers. Since many of these items are used for consumer beverages for mass markets, production is typically organized for very high quantities.
  • There are three main types of blow molding; Extrusion Blow Molding, Injection Blow Molding, and Stretch Blow Molding.


  • In Extrusion Blow Molding (EBM), plastic is melted and extruded into a hollow tube (a parison). This parison is then captured by closing it into a cooled metal mold. Air is then blown into the parison, inflating it into the shape of the hollow bottle, container or part. After the plastic has cooled sufficiently, the mold is opened and the part is ejected.
  • The process of Injection Blow Molding (IBM) is used for the production of hollow glass and plastic objects in large quantities.
  • In the Stretch Blow Molding (SBM) process, the plastic is first molded into a "preform" using the Injection Molded Process. These preforms are produced with the necks of the bottles, including threads (the "finish") on one end.


  • The terms chemical recycling and feedstock recycling of plastics, sometimes collectively referred to as advanced recycling technologies, describe a family of plastics recycling processes that convert solid plastic materials, through the use of heat, into smaller molecules (chemical intermediates).


  • Blow molded products find its application in  automotive , consumer, electronics, fuel oil tanks, furniture, health and safety, lawn, garden, marine, medical, packaging, sporting goods, toys.

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