Deck 11: Extrusion Processes

Question 1

In pipe extrusion, what forms the inside of the pipe? 

A) a mandrel
B) a spider
C) a tube
D) a screw assembly

Answer 1

A

Question 2

Screws are measured by their _____, from very small (19 mm) to very large (300 mm).

A) length
B) penetration
C) barrel
D) diameter

Answer 2

D

Question 3

Blow molding has been adopted from the ____ industry and modified for making one-piece containers and other articles.

A) glass
B) metals
C) automobile
D) textile

Answer 3

A

Question 4

The word extrusion is derived from the Latin word extrudere , which means to ____. 

A) heat
B) push
C) form
D) compress

Question 5

In this technical drawing, what is the name of the part indicated by the red arrow?

A) feed section
B) screw
C) head clamp
D) gear box

Question 6

When a thin film of molten plastics is applied to paper without the use of adhesives while paper and film are pressed between rollers, it is known as ____.      

A) sheet extrusion
B) pipe extrusion
C) calendering
D) extrusion coating

Question 7

The largest disadvantage of extrusion blow molding is ____. 

A) controlling wall thickness
B) the cost
C) training personnel
D) internal stresses

Question 8

The part of an extruder shown here is ____.

A) feed section
B) hopper
C) head clamp
D) breaker plate

Question 9

Which sport is most closely associated with filament extrusion?

A) hunting
B) golfing
C) fishing
D) tennis

Question 10

A prominent use of calendered film is in the ____ industry. 

A) aeronautic
B) medical  supply
C) automotive
D) textile

Question 11

The process of blending basic plastics with plasticizers, fillers, colorants, and other ingredients is called ____.     

A) injecting
B) compounding
C) curing
D) plasticating

Question 12

Calendering is the preferred method of producing ____ sheets at high rates.  

A) epoxy
B) PVC
C) acrylic
D) ABS

Question 13

What is the major difference between film extrusion and sheet extrusion? 

A) types of extrudate
B) processing time
C) thickness
D) cooling time

Question 14

A laminar bottle product can be formed by ____.

A) cold parison extrusion
B) co-extrusion
C) sheet extrusion
D) biaxial extrusion

Question 15

A long screw provides more ____ than a short screw.

A) mixing
B) pressing power
C) plastication
D) heating

Question 16

Most extruded products other than pipe, film, sheet, and filaments are formed by ____ extrusion. 

A) pipe
B) film
C) profile
D) sheet

Question 17

In profile extrusion, to produce exact cross-sectional dimensions after the extrudate has cooled, allowances must be made in the ____ design.

A) barrel
B) screw
C) blower
D) orifice

Question 18

The material is ____ as it goes through the transition section of the screw.  

A) fed
B) extruded
C) melted
D) mixed

Question 19

An advantage of extrusion blow molding is ____. 

A) machine cost is low
B) very little waste
C) most thermoplastics may be used
D) many shapes and die configurations are available

Question 20

What type of extrusion process is similar to inflating a balloon? 

A) blown-film
B) calender
C) sheet
D) pipe

Question 21

What is the process pictured here?  

A) blown-film extrusion
B) film casting
C) filament extrusion
D) calendaring

Question 22

This graphic representation shows the various shapes of ____.   

A) filaments
B) dies
C) deniers
D) spinnerets

Question 23

This graphic representation shows the process of ____.   

A) extrusion blow molding
B) parison blow molding
C) injection blow molding
D) continuous-parison process

Question 24

In ____ machines (pictured here), one screw wipes the material off the other one, allowing little material to pass between the two screws.  

A) corotating twin-screw
B) compounding s ingle screw
C) counter-rotating twin-screw compounding
D) downstream feeding

Question 25

The extrudates at left are postformed into the shapes at right by being passed through____.  

A) dies
B) rollers
C) spiders
D) orifices