Exam 4: Manufacturing Materials and Processes

List at least three considerations that influence the amount of extra material that must be left on a casting for machining allowance.

Name the process that works by placing a specific amount of polymer pellets into a metal mold. The mold is then heated as it is rotated. This forces the molten material to form a thin coating against the sides of the mold. When the mold is cooled, the product is removed.

identify the type of metal or metals that are part of the given Unified Numbering System (UNS) series: -R00001 to R99999

Define draft.

Identify the common name for the polyamide thermoplastic.

Define malleable.

Identify the metal that has the weight advantage of alumi- num and the strength of steel.

Identify the contents of the 200, 300, and 400 series stainless steels as identified by the American Iron and Steel Institute.

Define case hardening.

Describe the difference between hot- and cold-rolled steel.

Discuss the function of cores in the casting process.

Give the name of the machine that performs the stamping operation.

Identify at least one function of a counterbore.

What is the purpose of boring?

Describe electrodischarge machining (EDM).

Name the manufacturing process that is the most commonly used process for creating thermoplastic products. The pro- cess involves injecting molten plastic material into a mold that is in the form of the desired part or product. The mold is in two parts that are pressed together during the molding process. The mold is then allowed to cool so the plastic can solidify. When the plastic has cooled and solidified, the press is opened and the part is removed from the mold.

Give the name of a plastic that is inexpensive to produce and that has many desirable properties, including heat, chemical, scratch, and moisture resistance. It is also resis- tant to continuous bending applications. Products include appliance parts, hinges, cabinets, and storage containers.

Identify one of the primary functions of the grinding machine.

Define thermoset.

Describe bending.