Understanding Extrusion Process

What is extrusion used to create?

• Objects of a fixed cross-sectional profile

• Molded sculptures

• Flexible sheets of material

• 3D printed objects

Which material is not listed as an example used in extrusion?

• Polyethylene (PE)

• Silicone

• Polyvinyl chloride

• Acrylonitrile butadiene styrene (ABS)

What are the main advantages of extrusion?

• Complex cross-sections and working with brittle materials

• Color variety and flexibility

• Speed and cost

• Durability and strength

What does the extrusion process have in common with injection moulding?

• Both create objects with uniform cross-sections

• Both require molds to shape the plastic

• Both use a die of the desired cross-section

• Both involve heating plastic until liquid

How is plastic prepared for the extrusion process?

• By dissolving it in a solvent

• By cooling it to a solid state

• By compressing it into pellets

• By heating it until liquid

What is a characteristic feature of an extruded product?

• Split lines

• Uniform cross-section

• Varying thickness

• Multiple colors

Why are there no split lines in extruded products?

• Because they are made from a single material

• Because the products are painted

• Because there is no mould used

• Because they are polished after extrusion

What role does the hopper play in the extrusion process?

• It shapes the plastic into the final product

• It cools the extruded product

• It controls the amount of plastic going into the barrel

• It heats the plastic

What happens to the plastic in the barrel during extrusion?

• It is cooled rapidly

• It is heated until liquid

• It is mixed with other materials

• It is compressed

How does extrusion differ from injection moulding?

• Extrusion cannot create complex shapes

• Extrusion is only for metals

• Extrusion does not use a mould

• Extrusion uses higher temperatures