3D Product Materials and Finishing 3

Question 1

What is 'glass-filled nylon' and why is it used in engineering product components?

Accepted Answer

Nylon reinforced with short glass fibers, significantly increasing stiffness, strength, and heat resistance

Answer

Adding 10–50% glass fibers to nylon dramatically increases its tensile modulus and heat deflection temperature, enabling it to replace metal in structural brackets and housings.

Question 2

What is 'PVD (Physical Vapor Deposition)' coating used for on product surfaces?

Accepted Answer

Vacuum-depositing extremely thin, hard metal films for wear resistance and decorative metallic finishes

Answer

PVD sputters or evaporates metal in a vacuum chamber, depositing a nanometer-thin hard film — used for watch cases, tool coatings, and premium hardware finishes.

Question 3

What is the significance of 'IP ratings' (like IP67) for consumer product design?

Accepted Answer

They certify the product's level of protection against solid particle ingress and water ingress per IEC 60529

Answer

IP (Ingress Protection) ratings use two digits — the first for dust/solid protection (0-6), the second for water resistance (0-9K) — defining what environments a product can survive.

Question 4

What is 'pad printing' and when is it used in consumer product manufacturing?

Accepted Answer

A transfer printing method using a silicone pad to apply ink to irregular 3D surfaces

Answer

Pad printing picks up a 2D ink image from an etched plate and transfers it via a flexible silicone pad that conforms to curved, recessed, or textured product surfaces.

Question 5

What is 'in-mold labeling' (IML) in plastic part manufacturing?

Accepted Answer

Inserting a pre-printed film into the mold so it fuses permanently with the part during injection molding

Answer

IML places a decorated film in the open mold; injected plastic bonds to it, embedding the label permanently in the part surface during the molding cycle.

3D Product Practice Test

3D Product Practice Test

3D Product Materials and Finishing 3