Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Yes, thermosetting plastics can be used in injection molding, though the process requires specific modifications compared to thermoplastic molding, and it's less common due to the material's properties.

Key Differences and Process Overview

Thermosetting plastics (thermosets) undergo irreversible chemical cross-linking when heated, forming a rigid, heat-resistant structure that can't be remelted. This contrasts with thermoplastics, which soften and flow when heated and can be recycled. In standard thermoplastic injection molding, material is melted in a heated barrel and injected into a cooled mold. For thermosets:

1.Cold material injection: Uncured thermoset material (often in granular, paste, or liquid form) is injected into a heated mold (typically 150–200°C) to trigger curing via cross-linking.

2.Equipment adaptations: Standard screw-barrel machines can cause premature curing in the barrel, potentially damaging the equipment. Specialized setups, like plunger injection or hydraulic stuffers for bulk molding compounds (BMCs), are used to minimize shear and heat buildup.

3.Curing and ejection: The part cures in the hot mold, then is ejected while still warm, allowing for faster cycles (2–3 times quicker than compression molding).

Advantages and Applications

Thermosets excel in high-heat, chemical-resistant, or durable parts, such as:Electrical insulators and connectors.

Medical device components (e.g., handles resistant to disinfectants).

Automotive under-hood parts or subsea equipment.

However, they're harder to process, less recyclable, and may require trimming flash (excess material at mold seams). Many manufacturers specialize in either thermosets or thermoplastics, so consult experts for feasibility.