Product Info

Insert molding integrates metal components and plastic resin in one process, reducing assembly time and enhancing part reliability ideal for automotive, electronic, and medical applications.

Basic Structure and Features of Insert Molding
Insert molding is a resin molding technique where metal or ceramic inserts are pre-positioned in a mold before plastic injection. This creates a single molded component with both materials firmly bonded together.

Benefits of Insert Molding
1. Fewer Assembly Steps, Higher Quality
The molding process encapsulates inserts directly, eliminating manual insertion, welding, or bonding. This:
- Cuts production time
- Minimizes defects from human error
- Strengthens joints for long-term durability

2. Functional Integration of Multiple Materials
Insert molding combines:
- Metal: for conductivity and heat resistance
- Resin: for lightweight insulation and design flexibility
This is ideal for multifunctional parts in electronics, automotive, and medical equipment.

Applications of Insert Molding
- Automotive: Sensors, switches, bush-integrated housings
- Electronics: PCB connectors, terminal casings, heat-resistant parts
- Medical Devices: Surgical tools, metal-resin composite instruments
- Industrial Equipment: Screwed housings, vibration dampers, high-strength parts
These applications benefit from reduced size, weight, and improved mechanical integrity.

Key Technical Points in Insert Molding
To ensure performance, insert molding requires high precision in design and processing:
- Insert Pre-Treatment: Clean metal surfaces ensure proper resin bonding
- Mold Design: Positioning pins and guides secure accurate insert alignment
- Resin Selection: Must consider thermal expansion differences with metal
- Molding Conditions: Controlled injection pressure/temperature to avoid warping or voids

Recommended Resin Materials
- PA : Strong, heat-resistant, bonds well with metal
- PBT : Excellent for stable electronic components
- PPS : High heat and chemical resistance
- PC : Used when transparency is required

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