Plastics Processes: Extrusion Blow Moulding

Extrusion Blow Moulding

The extrusion blow moulding process consists of the following sequence of operations:

• plasticised polymer is extruded as a hollow pipe called a parison
•  the parison is cut to length and clamped in the blow mould
• the blow mould is passed to the air pipe and the parison is given a blast of air
• air inflates the hollow parison and forces it against the sides of the mould
• after a short cooling period, the moulding is ejected.  

The extruder produces a continuous flow of hollow section parison, so two or more moulds will be used to keep up with the flow of polymer.

Typical plastics used for extrusion blow moulding include:

• Polyethylene - Terephthalate (PET)
• Polypropylene (PP)
• Polyethylene (PE)
• Polyvinyl Chloride (PVC)

The sample notes and animation below, describe the extrusion blow moulding process.

View the Plastics Module brochure online Download a free PDF Plastics Module brochure

Learn about Plastics

We use animations and supporting technology notes to describe plastics and plastics processes.

Animations illustrate plastics processes in probably the most clear way possible, making plastics processes easy to understand, easy to learn and easy to remember.

Our plastics technology notes and animations describe all the major processes including:

• Line Bending
• Expanded Polystyrene
• Injection Moulding
• Extrusion Blow Moulding
• Blown Film
• GRP
• Resin Transfer
• Pultrusion Process
• Moulding DMC
• Moulding SMC

Plastics Module

Our new Plastics Module developed from the work in the KS3 and KS4 D&T packages. It is a complete package that includes:

• plastics technology notes
• animations of plastics processes
• a range of exercises that include design and make assignments (DMAs), focused practical tasks (FPTs) and technology questions.

To make teaching easier, the technology theory notes and exercises are in digital format, making them suitable for computers and whiteboards; and in PDF format, which makes it simple to print and duplicate A4 theory notes and worksheets.

Click here to view the contents of the Plastics Module

Comprehensive and economical D&T software bundle

Three great software products covering the design aspects, the resistant materials aspects and product design aspects of KS3 and KS4 D&T courses.

Our new D&T software bundle includes:

• Plastics Module
• KS3 Design and Technology
• KS4 Design and Resistant Materials Technology

The three packages contain a wealth of technology theory notes, animations of D&T processes, design exercises, design analysis exercises and technology exercises.

Download links will be emailed to you/your school within 24 hours of receipt of your order.

Plastics Module
Single User Licence - £30	School Site Licence - £60
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Plastics Module + KS3/KS4 D&T software bundle

New Software Bundle: Plastics Module + KS3 D&T + KS4 D&T
Single User Licence - £60	School Site Licence - £120
Click here to place an order for a UK school or college