Jamna Auto Industries new Product Development Engineer Interview Questions and Answers

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