Mould Maintanace Interview Questions and Answers

A locating ring is used in mould maintenance to ensure accurate alignment and positioning of mould components.

• Locating rings are typically made of hardened steel and are precision machined to tight tolerances.

• They are installed in the mould base and act as a guide for other mould components, such as the core and cavity inserts.

• The locating ring provides a reference point for the alignment of these components, ensuring proper fit and function of the mould.

• It helps in maintaini...read more

There are two types of moulds according to opening: open moulds and closed moulds.

• Open moulds have one opening and are used for simple shapes.

• Closed moulds have multiple openings and are used for complex shapes.

• Examples of open moulds include cookie cutters and soap moulds.

• Examples of closed moulds include injection moulds and blow moulds.

There are two types of moulds according to feed: hot runner moulds and cold runner moulds.

• Hot runner moulds have a system that keeps the plastic in the runners hot, allowing for faster and more efficient production.

• Cold runner moulds have channels that are not heated, resulting in slower production and more waste material.

• Examples of hot runner moulds include valve gate systems and hot sprue bushings.

• Examples of cold runner moulds include two-plate moulds and three-plate moul...read more

Ejector pins are used in mould maintenance to push the finished part out of the mould cavity.

• Ejector pins are typically made of hardened steel and are inserted into the mould cavity.

• They are activated by the ejector system to push the finished part out of the mould.

• Ejector pins help in the efficient and timely removal of the part from the mould.

• They prevent the part from getting stuck in the mould cavity and aid in the overall moulding process.

• Examples of ejector pins include...read more

HRTC stands for Hot Runner Temperature Controller and MTC stands for Mould Temperature Controller.

• HRTC is used to control the temperature of the hot runner system in injection molding.

• MTC is used to control the temperature of the mold itself.

• Both are important for maintaining consistent quality in injection molding.

• Examples of brands that manufacture these controllers include Athena Controls and Mold-Masters.