AAA MOULD provides professional insert molding services
What is insert molding?
Insert molding is a special injection molding process. It refers to placing pre-prepared metal inserts, plastic inserts, electronic components, or other material parts (collectively called "inserts") into the mold cavity during the injection molding process. Molten plastic is then used to wrap or bond with the inserts through injection, forming a complete composite part. This process can combine the properties of multiple materials to enhance the functionality, strength, or assembly efficiency of the part.
Process Advantages of Insert Molding
◉ Reduces assembly steps and connecting components (such as screws and adhesives), shortening the production cycle.
◉ During mass production, inserts can be pre-fabricated in advance, and injection molding forms the part in one step, offering significant cost advantages.
◉ Inserts and plastic are connected through intermolecular bonding (such as chemical bonds and mechanical locking), resulting in higher strength than post-assembly connections.
◉ Avoids looseness and corrosion issues in traditional assembly (such as thermal expansion coefficient matching design between metal and plastic).
◉ Enables complex structures that are difficult to manufacture with traditional processes (such as internal hollow inserts + external plastic cladding).
◉ Supports miniaturization (such as embedded packaging of precision electronic components) and large-scale applications (such as composite structural parts for industrial equipment).
Core Characteristics of Insert Molded Parts
Common Insert Types and Application Scenarios
|
Insert Material |
Typical Insert Types |
Application Scenarios |
|
Metal |
Copper/iron/aluminum terminals, bolts, shafts, springs |
Automotive connectors, electronic switches, gearbox components, home appliance handles (metal enhances strength) |
|
Plastic |
Pre-molded plastic parts, transparent components |
Two-color injection molded parts (e.g., transparent lamp covers + structural bases), composite gears (hard tooth surfaces + soft substrates) |
|
Electronic Components |
Chips, resistors, coils, sensors |
Smart wearable devices (embedded circuit boards), automotive electronic modules (plastic housings for integrated circuits) |
|
Composite Materials/Ceramics |
Carbon fiber plates, ceramic sheets, glass beads |
Aerospace components (lightweight + high-temperature resistance), precision instruments (insulation + wear resistance) |