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Materials & Finishing Flashcards

6 cards from real 3D Product practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Materials & Finishing flashcards as text

  1. What is 'powder coating' and how is it applied to product surfaces?

    Answer: A finishing process where electrostatically charged dry powder is applied to a grounded part and then cured in an oven

    Powder coating applies charged dry powder to metal parts via electrostatic attraction, then cures it in an oven to form a durable, even finish more resistant than paint.

  2. What is the purpose of 'sandblasting' in product finishing?

    Answer: To create a uniform matte texture and remove surface imperfections by propelling fine abrasive particles at high speed

    Sandblasting (or bead blasting) uses high-pressure abrasive media to clean, texture, or prep surfaces — creating consistent matte or satin finishes on metal and plastic.

  3. What is 'anodizing' and what types of products commonly use it?

    Answer: An electrochemical process that thickens the natural oxide layer on aluminum for improved hardness, corrosion resistance, and color dyeing

    Anodizing creates a hard, porous oxide layer on aluminum that can be dyed in various colors and improves corrosion and wear resistance — common in electronics, cookware, and sporting goods.

  4. What is 'overmolding' in product manufacturing and design?

    Answer: Molding a soft material (like rubber or TPE) over a rigid substrate to create two-material parts like handles or grips

    Overmolding injects a second material (typically soft TPE or rubber) onto a rigid part, creating ergonomic grips, soft-touch surfaces, and sealed interfaces in one assembly.

  5. What is 'surface roughness' (Ra) and how is it specified for manufactured products?

    Answer: A measure of the microscopic texture of a surface quantified as the average deviation from the mean line, specified in micrometers

    Surface roughness Ra is the arithmetic mean deviation of a surface profile from its centerline — lower Ra values (like 0.8 micrometers) indicate smoother surfaces than higher values.

  6. What is 'Nylon (PA12)' commonly used for in 3D printing product applications?

    Answer: Functional, durable parts requiring flexibility, chemical resistance, and toughness — particularly in SLS printing

    Nylon PA12 is a tough, fatigue-resistant engineering polymer widely used in SLS printing for durable end-use parts like hinges, snap fits, brackets, and fluid system components.