INJECTION MOULDING

The 2 principal components of an injection moulding machine are...

• Injection unit and the Mold Clamping unit

• Injection unit and the Blowing unit

• Compression unit and the Blowing unit

• Injection unit and the Compression unit

Figure shows a section of a Injection Molding Machine. Name the "?" part.

• Compression unit

• Mold Unit

• Ejection Unit

• Heating Unit

Which of the following is not the Mould distribution channel.

• Sprue

• Gate

• Runner

• Vent

What is the defect called?

• Flashing

• Sink Mark

• Weld Line

• Short shots

What is the name of the part that holds the plastic powder?

• Heater

• Plastic granules

• Hopper

• Screw

What is the defect called?

• weld line

• jetting

• flow marks

• sink marks

Which sequence of injection moulding process is CORRECT?

• Melting, cooling, injecting, ejecting

• Injecting, Melting, Cooling, Ejecting

• Ejecting, Cooling, Injecting, Melting

• Melting, Injecting, Cooling, Ejecting

Which of the following is NOT the component in Injection Moulding Machine?

• Injection Ram

• Mould

• Clamp

• Resin

Define function of Mould.

• Conveys or moves the resin to the confined chamber or mould

• Forming of the material into a specific shape

• Place to introduce resin into the injection moulding machine

• Melted the resin by  thermal energy from the heaters that surround the barrel

Check valves are used on all machines to provide a way to:

• Connect the molding machine to the mold

• Stop the material from flowing over the screw during injection

• Positively shut off the material to prevent drooling

• None of the above