Uniko Plast Mechanical Engineer Interview Questions, Process, and Tips

Injection moulding is a manufacturing process used to produce parts by injecting molten material into a mould.

• Molten material is injected into a mould cavity

• The material solidifies inside the mould

• The mould is then opened and the part is ejected

• Commonly used for producing plastic parts

• Can also be used for producing metal, glass, and ceramic parts

Core and cavity are the two halves of a mold used in injection molding process.

• Core is the part of the mold that creates the internal features of the plastic part.

• Cavity is the part of the mold that creates the external features of the plastic part.

• Core and cavity are designed to fit together to create the final shape of the plastic part.

• The molten plastic is injected into the cavity and takes the shape of the core.

• The...read more

There are various types of plastics such as thermoplastics, thermosetting plastics, and elastomers.

• Thermoplastics can be melted and re-molded multiple times, examples include polyethylene and PVC.

• Thermosetting plastics cannot be melted and re-molded, examples include epoxy and phenolic resins.

• Elastomers are rubber-like materials that can stretch and return to their original shape, examples include silicone and neoprene

Cushion is the amount of money or time added to a project schedule to account for uncertainties and risks.

• Cushion is also known as contingency reserve.

• It is added to the project schedule to ensure that the project is completed on time and within budget.

• The amount of cushion depends on the level of uncertainty and risk involved in the project.

• For example, a project with a high level of uncertainty and risk may require a...read more

Injection moulding machines are classified based on their function, structure, and control system.

• Based on function: hydraulic, electric, hybrid

• Based on structure: vertical, horizontal, multi-component

• Based on control system: manual, semi-automatic, automatic

• Examples: Arburg, Engel, Krauss Maffei

OEE can be calculated by multiplying Availability, Performance, and Quality percentages.

• Calculate Availability by dividing Operating Time by Planned Production Time.

• Calculate Performance by dividing Actual Production by Maximum Production.

• Calculate Quality by dividing Good Units by Total Units Produced.

• Multiply Availability, Performance, and Quality percentages to get OEE.