CHAPTER 5:MOULDING PROCESSES

The following are the plastic moulding processes, EXCEPT

• Stretch Blow

• Cast

• Injection

• Compression

Which are NOT the starting form of plastics for the molding process.

• Powder

• Pallets

• Liquid

• sheet

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 process?

_{(1)injection molding of parison;}

_{(2) stretching;}

_{(3) blowing.}

• Injection blow molding

• Stretch blow molding

• Injection blow Molding

• Rotaional Molding

The following are the benefits of Compression Moulding, EXCEPT,

• Low Cost

• Little Waste

• Produce Large Parts

• High Production Rate

What design modification can be done to achieves increased stiffness without increasing the wall thickness.

• Reinforcing ribs

• Introduce holes

• Include sharp corners

• Introduce draft