Motherson Automotive Technologies and Engineering Interview Questions, Process, and Tips

The root cause of burn marks can vary depending on the context, but common causes include heat exposure, electrical currents, chemical reactions, and friction.

• Heat exposure: Direct contact with hot objects or surfaces can cause burn marks.

• Electrical currents: Electric shocks or faulty electrical equipment can result in burn marks.

• Chemical reactions: Contact with corrosive substances or strong acids can lead to burn mar...read more

Double ejection is used in injection molds to improve part ejection and reduce cycle time.

• Double ejection helps in ejecting complex parts with undercuts or threads.

• It reduces the risk of part damage during ejection.

• By ejecting the part from both sides simultaneously, it speeds up the overall cycle time.

• Double ejection can prevent the need for manual intervention in part removal.

• It is commonly used in industries like au

Shrink is the reduction in size of a plastic part during cooling, while shrinkage refers to the percentage of size reduction. 2plate and 3plate molds are types of injection molds used in plastic part manufacturing.

• Shrink is caused by the cooling and solidification of the plastic material.

• Shrinkage is expressed as a percentage and is calculated by comparing the dimensions of the molded part to the dimensions of the mold...read more

Injection molding is a manufacturing process used to produce parts by injecting molten material into a mold.

• It is a widely used manufacturing process in various industries.

• The molten material is typically a thermoplastic or thermosetting polymer.

• The material is injected into a mold cavity under high pressure.

• Once cooled and solidified, the mold is opened, and the part is ejected.

• Injection molding allows for the product...read more

Mold temp refers to the temperature of the mold used in the injection molding process.

• Mold temp is a critical factor in determining the quality and properties of the final product.

• It affects the cooling rate of the molten material inside the mold.

• Maintaining proper mold temp helps in achieving consistent part dimensions and minimizing defects.

• Examples: High mold temp can lead to longer cooling times but better surface ...read more

Shrinkage value of a material refers to the amount by which the material contracts or shrinks during the cooling process after being molded or formed.

• Shrinkage value is typically expressed as a percentage of the original size of the material.

• It is an important factor to consider in manufacturing processes, especially in injection molding and casting.

• Different materials have different shrinkage values, so it is crucial ...read more