Molding is an injection molding process that utilizes
an insert placed in the molding cavity.
A molecular bond is established when using materials
that are similar to the surrounding resin. A
mechanical bond is established when using materials
that are dissimilar to the surrounding resin.
When comparing the two, for obvious reasons the
molecular bond is stronger than the mechanical.
For best results in using the mechanical bond
process, it is important to use an insert that
is capable of handling the surrounding plastic.
Insert molding can be used for molding fasteners,
pins and terminals, and is widely used for molding
parts needed in constructing medical equipment.
A variety of materials
are used in insert molded plastics. These include: