Mold core is an extended or male portion of the mould which creates the internal plastic part surface whereas cavity is a depression or female portion of the mould which creates the external plastic part surface.Mold core is a pre-prepared shape of the mould. It is used to provide internal cavities, recesses, or projections in the casting. It is usually positioned into a mould after the removal of the pattern. A core is usually made of the best quality sand and is placed into desired position in the mould cavity.

The only difference here is that the metal is inserted into the molten resin before the mold closes. This way, the plastic covers the product completely and the entire main product is engulfed in the plastic with no cracks and even wall thickness. The inserted product can be simple such as a blade or a tube or it can be very complex like a metal insert for a complex machine.The reason insert molding is preferred is that it is not an attachment of many plastic parts through screws to develop a cover for the product. The product is completely inside the covering and the cover is naturally formed around the product by a mechanical bond. It provides a soft grip and good quality product design by using CNC machining.

Various plastic injection molding companies make the use of vertical injection molding presses for the process. This allows them to use gravity to position and maintain the insert while the mold is closed.

Additionally, vertical insert molding machines have multiple bottom mold halves within a single cavity half. Different bottom halves can be loaded at different times. Hence when one bottom half is in the process of molding with the cavity half, the other bottom can be loaded with resins. In a screw-based assortment with threaded insert, which happens in other kinds of molding, there is a high risk of wear and tear.This plastic injection molding process is used because it has a more reliable structure and it increases the strength of the product by many folds. It is also preferred because the process is cheaper and is easy for 3D modeling.Any other form of molding alternative to inserting costs more because the other processes require many sub-processes such as soldering, adhesives, connectors, threaded insert, and screws.Insert molding does not require any of these processes and the product comes out stronger and more reliable due to sound design for manufacturability.In conclusion, insert molding design as a process is better than other forms of molding
Mainly because other forms of molding are older technology and insert molding design is the latest technology available. When it came out, it was considered a breakthrough and it has been around for a while.Insert molding design is the best way to ensure that the product that is manufactured is lightweight.

Most manufacturers and designers agree that insert molding is one of the most efficient plastic injection molding technologies. It offers the ability to work with a wide range of materials and create complex part geometries.

 
The cost savings and the improved designs lead to efficient manufacturability and customer satisfaction too.If you have any inquiry for mould inserts, please kindly feel freely contact Chapman Maker.