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Views: 0 Author: Site Editor Publish Time: 2024-09-21 Origin: Site
Polycarbonate injection molding is the manufacturing process of producing molded parts using PC (Polycarbonate) resin. This involves heating PC material until molten and injecting it into a mold cavity to form the desired shape.
Polycarbonate is an amorphous thermoplastic polymer known for:
High impact resistance
Excellent optical clarity (transmits light like glass)
Heat resistance and dimensional stability
Flame retardance (can be enhanced with additives)
Good dielectric properties
Because PC is amorphous, it does not have a sharp melting point like crystalline plastics, making it ideal for thermoforming and injection molding.
Type: Amorphous thermoplastic
Light Transmission: High (similar to glass)
Thermal Resistance: High, with flame-retardant variants available
Recyclability: Can be reheated, reshaped, and cooled repeatedly without significant degradation
| Parameter | Typical Range / Note |
|---|---|
| Melt Temperature | 270°C – 320°C |
| Decomposition Risk | > 320°C (may cause bubbles, black spots, degradation) |
| Injection Pressure | 80 – 120 MPa |
| Mold Temperature | 80°C – 120°C (higher for optical-grade clarity) |
| Drying Conditions | 110°C – 120°C for 3 – 4 hours (PC is hygroscopic) |
Drying is Critical: PC absorbs moisture easily. If not properly dried, moisture causes bubbles, splay, and weak mechanical properties.
Temperature Control: Overheating leads to material degradation and discoloration.
Injection Speed: Should be moderate to fast to ensure good mold filling without creating excessive shear heat.
Screw Design: Use a general-purpose screw with a compression ratio of 2.5–3.0.
Back Pressure: Use low-to-medium back pressure (5–15 bar) to ensure uniform melt and reduce air entrapment.
Ventilation: Proper venting is necessary to eliminate gas and moisture and avoid burn marks.
Optical lenses and light covers
Electrical and electronic enclosures
Automotive components
Medical devices and housings
Safety helmets and transparent guards
Consumer products (bottles, containers, etc.)
We are one of China’s leading plastic mold suppliers, specializing in PC injection molding and high-polish transparent parts. From automotive and electronics to medical and consumer goods, we deliver precision-engineered molds tailored to your application.
Contact us today (shine@swymould.com) to get a free quote or discuss your project requirements!
