18 Questions
What type of material system is utilized in the injection molding process?
Molding compounds in pellet form
What is a common application of prepreg systems?
Golf club shafts
What is a type of molding compound?
Sheet Molding Compound
What manufacturing process is often used with molding compounds?
Compression molding
What is a characteristic of molding compounds used in injection molding?
They are in a pellet form
What is a common application of composite materials?
Golf club shafts
What is the typical range of process cycle time for compression molding?
1 to 4 min
What is a characteristic of Thick Molding Compound (TMC) fibers?
Random distribution in three dimensions
What is the primary advantage of using Thick Molding Compound (TMC) over Sheet Molding Compound (SMC)?
Elimination of multiple SMC plies
What is the typical fiber volume fraction in Bulk Molding Compound (BMC) or Dough Molding Compound (DMC)?
15 to 20%
Which type of reinforcement can be used in injection moldable compounds?
Glass, carbon, and aramid fibers
What is a characteristic of Bulk Molding Compound (BMC) or Dough Molding Compound (DMC) composites?
Lower mechanical properties than SMC composites
What is a major disadvantage of prepreg materials?
Higher cost
What is the primary resin used in Sheet Molding Compound (SMC)?
Polyester or vinylester
What is the maximum thickness of Sheet Molding Compound (SMC)?
6 mm
What is the purpose of applying a prepreg to the surface of an aerospace composite?
To improve its properties
What is the process used to mold SMC?
Compression molding
What percentage of short glass fibers is typically contained in SMC?
30% by weight
This quiz covers the process cycle time and applications of compression molding, specifically SMC and TMC. Learn about their production capabilities, thickness, and fiber distribution.
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