Fixing Methods for Injection Mold Inserts
The fixing method of injection mold inserts is directly related to the service life, machining accuracy, and molding stability of the mold. A proper fixing method ensures that inserts remain stable during operation without shifting, deforming, or being damaged while also facilitating installation and maintenance.
1. Screw Fixing
Principle: Inserts are secured to the mold base using screws.
Characteristics:
Easy to install and remove for maintenance.
Suitable for areas with minimal lateral or vertical forces.
Requires threaded holes or embedded nuts, which may affect mold strength.
Application Scenarios: Thin-walled inserts, small inserts, or regions with low precision requirements for fixing.
2. Interference Fit
Principle: The insert is slightly larger than the mold cavity, and pressure fitting secures it firmly in place.
Characteristics:
Provides a tight fit and stable fixation.
Suitable for high-temperature and high-pressure environments, though installation and removal can be challenging.
Requires high machining precision with controlled tolerance.
Application Scenarios: High-strength fixing areas with low replacement frequency, such as cores.
3. Press Plate Fixing
Principle: A press plate (usually a metal piece) is used to press the insert tightly into the mold, secured by screws.
Characteristics:
Flexible installation, allowing for easy insert replacement.
Low precision requirements for insert manufacturing and mold installation dimensions.
Suitable for larger inserts but requires additional space.
Application Scenarios: Inserts with large areas or complex shapes.
4. Magnetic Fixing
Principle: Inserts are fixed to the mold using magnetic force.
Characteristics:
Quick installation and convenient removal.
Suitable for lightweight or temporary inserts but offers limited strength.
Not suitable for high-temperature environments or scenarios requiring strong fixation.
Application Scenarios: Experimental molds or temporary inserts with low fixation strength requirements.
