What is extrusion blow moulding?

In extrusion blow molding a plastic material feedstock is fed through a hopper onto a feeding transfer screw. This feeds material into an especially designed blow molding die that directs the material flow to create an extruded hollow tube called a parison.

Is blow molding the same as extrusion?

Extrusion Blow Molding is the simplest type of blow molding. A hot tube of plastic material, called a parison, is dropped from an extruder and captured in a water cooled mold.

How is blow moulding done step by step?

The process includes the following steps:

  1. Plastic pellets are fed into the machine via a hopper or screw depending on the machine.
  2. Plastic melts and then gets shaped into a parison, which looks like a tube with a hole at one end.
  3. Clamped in place inside the mold.
  4. Compressed air inflates the parison.

Is there any relationship between extrusion and blow molding explain?

Extrusion blow molding (EBM) is a process in which plastic, or parison, is melted and expelled or extruded to develop a shape in a hollow tube. It thus forms a mold. The parison is kept and sealed within a metal parent mold. Air is then transferred into the mold facilitating its formation into the intended shape.

Why is extrusion Moulding used?

Extrusion moulding is used to form plastic or metal materials into a pre-defined shape. During the process, the material is melted and pushed through an extrusion moulding machine, forming a long, tube-like shape or rod.

What is the principle of extrusion moulding process?

Extrusion is a metal forming process in which metal or work piece is forced to flow through a die to reduce its cross section or convert it into desire shape. This process is extensively used in pipes and steel rods manufacturing. The force used to extrude the work piece is compressive in nature.

What is extrusion process with diagram?

Extrusion is a process used to create objects of a fixed cross-sectional profile by pushing material through a die of the desired cross-section.