Final answer:
The four pieces of auxiliary equipment required for injection molding operations are Chillers, Conveyors, Dryers, and Hoppers. Each plays a specific role in the process, such as temperature control, material handling, moisture reduction, and material storage and dispensing.
Step-by-step explanation:
The correct answer to the question 'Name four pieces of auxiliary equipment that may be required for injection-molding operations' is A) Chillers, Conveyors, Dryers, Hoppers. These pieces of equipment all play vital roles in the injection molding process:
- Chillers are used to control the temperature of the mold, which can be critical for ensuring that the finished product has the proper structure and properties.
- Conveyors are used to move the molded parts from the machine to the next stage of processing or packaging.
- Dryers are essential for reducing the moisture content in hygroscopic resins before they are injected into the mold, which can prevent defects in the molded parts.
- Hoppers hold and dispense the raw material, typically plastic pellets, into the injection molding machine.
This selection contains equipment that specifically supports the injection molding process, which involves producing parts by injecting molten material into a mold. Other auxiliary equipment like welders, presses, grinders, or furnaces are not typically associated with injection molding operations, but rather with different forms of manufacturing such as metalworking or metal casting.