Secondary Machining of Plastic Parts

Machining and Milling:

  1. Parts may undergo machining and milling operations to achieve tight tolerances, complex geometries, or specific surface finishes. CNC (Computer Numerical Control) machining is often used for precision machining of injection-molded parts.

Drilling and Tapping:

  1. Holes may need to be drilled into molded parts for various purposes, such as assembly or the integration of additional components. Tapping threads into holes for screws or fasteners is another common operation.

Insert Molding:

  1. Insert molding involves placing metal or plastic inserts into the mold before injection molding. After molding, secondary machining operations may be needed to ensure proper alignment and fit of the inserts.

Surface Finishing:

  1. Injection-molded parts may undergo secondary processes to improve their surface finish. This can include techniques such as polishing, buffing, or applying coatings to enhance aesthetics and functionality.

Welding and Bonding:

  1. Welding or bonding processes may be employed to join multiple molded parts together, creating a more complex assembly. Ultrasonic welding, solvent bonding, or adhesive bonding are examples of techniques used in secondary bonding processes.

Heat Staking:

  1. Heat staking involves using localized heat to deform or melt specific areas of a molded part, allowing it to be joined or fastened to another component. This is commonly used for joining plastic parts without additional fasteners.

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