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Injection Molding Trivia Quiz

This document contains a 10 question quiz about injection molding processes and terms. The quiz covers topics like residence time, how polymer strands behave during injection, reasons for splay or warping in parts, uses for glass fibers in resins, tensile strength, resins used for CDs, consequences of parts not cooling enough before ejection, suitability of materials like PVC for different applications, purposes of vents in molds, and how trapped gas can cause burning in plastics.

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263 views3 pages

Injection Molding Trivia Quiz

This document contains a 10 question quiz about injection molding processes and terms. The quiz covers topics like residence time, how polymer strands behave during injection, reasons for splay or warping in parts, uses for glass fibers in resins, tensile strength, resins used for CDs, consequences of parts not cooling enough before ejection, suitability of materials like PVC for different applications, purposes of vents in molds, and how trapped gas can cause burning in plastics.

Uploaded by

lnos99
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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11/07/2019 Injection Molding Bits and Bites Quiz | 10 Questions

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Injection Molding Bits and Bites


10 question trivia quiz, authored by jmoutoux

Home » Quizzes » Science Quizzes » Technology and Computers Trivia » General Technology Trivia

So you think you're a molder?


Average score for this quiz is 6 / 10. Difficulty: Average. Played 300 times. As of Jul 11 19.

1. The time between cycles that your molten plastic sits in the barrel is called?

Residence Time
Down Time.
Wait Time.
Cycle Time.

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2. When molten plastic is injected in to your mold at high speed what happens to the polymer strands?

Nothing!
They bunch up and stop flowing.
They become linear aligned.
They break.

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3. You hear a process technician say that your part has splay. Which of these could have caused this?

Distortion of the plastic.


There was dirt in the molten plastic.
A broken mold.
There was moisture in the melted plastic.

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4. Why would I want glass fibers in my resin?

To make my part clear.


To make my part shiny.
For decoration.
To increase part strength.

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5. A resin's (plastic) tensile strength is?

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11/07/2019 Injection Molding Bits and Bites Quiz | 10 Questions

The ability for polymer strands to stretch.


The amount which polymer strands can be stretched before breaking.
Polymers resistance to heat.
A polymers UV resistance.

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6. What type of resin is used to make CD's?

ABS (Acrylonitrile butadiene styrene).


PC(Polycarbonate).
PVC(Polyvinyl chloride).
PP(Polypropylene).

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7. If my molded part does not cool enough before being ejected from the mold what happens?

It falls apart.
The part is too hot too touch.
The part warps and shrinks.
The plastic loses its color.

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8. Why would you not mold a toothbrush with PVC(Polyvinyl chloride) plastic?

It has a bad smell.


It is too hard to mold.
PVC is Toxic.
It is not the right color.

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9. Why would we want to make vents in our molding die?

So air can get into the plastic.


To allow excess plastic to escape the mold.
So we can see whats happening.
To allow gas to escape.

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10. How does gas from molten plastic cause burning in the plastic?

The gas is hotter than the plastic.


Gas catches fire!
The trapped gas ignites from the heat generated by pressure.
The gas mixed with air explodes.

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11/07/2019 Injection Molding Bits and Bites Quiz | 10 Questions

Submit my Answers!

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