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Injection Molding Quiz

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Questions and Answers

What is the purpose of the reciprocating screw in the injection molding process?

To control the temperature of the molten polymer-fiber mixture

To rotate and move forward and backward to force the polymer-fiber mixture into the mold (correct)

To only rotate and mix the polymer-fiber mixture

To release the molded polymer-fiber mixture from the mold

What is the composition of the polymer-fiber mixture used in injection molding?

Molten thermosetting polymer mixed with long reinforcing fibers

Molten thermoplastic polymer mixed with very short reinforcing fibers (correct)

Molten thermoplastic polymer without any reinforcing fibers

Molten thermosetting polymer without any reinforcing fibers

What is the function of the sprue gate and runners in the injection molding process?

To cool the molten polymer-fiber mixture

To remove excess polymer-fiber mixture

To mix the polymer and fibers evenly

To channel the molten polymer-fiber mixture into the mold cavity (correct)

What is the name of the process in which the molten polymer-fiber mixture is forced into the mold under high pressure?

<p>Injection molding</p> Signup and view all the answers

How is the polymer-fiber mixture fed into the injection molding machine?

<p>In the form of pellets through a hopper</p> Signup and view all the answers

Study Notes

Injection Molding Process

The reciprocating screw plays a crucial role in the injection molding process by plastifying, mixing, and metering the polymer-fiber mixture.

Polymer-Fiber Mixture Composition

The polymer-fiber mixture used in injection molding is a composite material consisting of a polymer matrix reinforced with fibers.

Sprue Gate and Runners Function

The sprue gate and runners in the injection molding process serve as channels that direct the molten polymer-fiber mixture from the injection molding machine into the mold cavity.

Injection Molding Process Step

The process of forcing the molten polymer-fiber mixture into the mold under high pressure is called injection.

Feeding the Polymer-Fiber Mixture

The polymer-fiber mixture is fed into the injection molding machine through a hopper, where it is gravity-fed into the machine's barrel.

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Description

Test your knowledge of polymer composites with this quiz on injection molding. Learn about the process of forcing molten polymer with reinforcing fibers under high pressure to create strong and durable composite materials.