custom liquid silicone rubber injection molding in China
Liquid Silicone Rubber Injection Molding
Liquid Silicone Rubber (LSR) injection molding is a specialized process used to produce high-performance elastomer parts with excellent durability, flexibility, and heat resistance. It is commonly used in medical, automotive, electronics, and consumer applications due to its biocompatibility and long-term stability.
At Alpha-Mold, we provide complete LSR injection molding solutions that support clients from mold design to high-volume production.
What Is LSR Injection Molding?
LSR injection molding involves injecting a two-part silicone compound into a heated mold under pressure. Once cured, the silicone takes on a solid rubber-like form with superior mechanical and chemical properties.
Unlike thermoplastics, LSR remains flexible and functional in a wide range of environments, making it suitable for components that require sealing, cushioning, or repeated compression.
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Advantages of Liquid Silicone Rubber Molding
1. Exceptional Material Properties
LSR is resistant to extreme temperatures, UV light, ozone, and chemicals. It maintains elasticity over time and is ideal for both static and dynamic applications.
2. Biocompatibility
Because of its non-toxic nature, LSR is widely used in medical devices, infant products, and food-grade components.
3. High Dimensional Stability
LSR parts maintain their shape and performance even under stress, which is critical for seals, gaskets, and diaphragms.
4. Design Flexibility
The process allows for fine details, undercuts, and thin-walled geometries—making it ideal for miniaturized components or products with complex contours.
5. Automated, Clean Processing
LSR molding supports automated injection, which improves cycle times and reduces contamination risks—especially valuable in medical and cleanroom manufacturing.
Common Applications of LSR Molding
LSR is trusted in industries where softness, durability, and safety are essential. Key applications include:
Medical: syringe stoppers, valves, seals, respiratory masks
Consumer Electronics: wearable watch straps, device buttons, flexible enclosures
Automotive: sensor seals, cable grommets, thermal insulation parts
Baby Products: bottle nipples, pacifiers, teething toys
Industrial Equipment: vibration dampers, sealing rings, fluid control parts
How Alpha-Mold Supports Your LSR Projects
As an experienced provider of custom LSR injection molding services, Alpha-Mold offers:
Tailored mold designs optimized for LSR shrinkage and flow
Material selection support based on performance and compliance needs
Rapid tooling and prototype sampling for fast development cycles
Scalable production options from pilot runs to millions of parts
Consistent quality checks with dimensional reporting and traceability
Our engineering team collaborates closely with customers to ensure the final product meets exact specifications and end-use requirements.
Liquid Silicone Rubber injection molding provides a reliable, flexible solution for manufacturers seeking durable, high-performance elastomer components. From medical seals to wearable tech housings, LSR enables design innovation and material reliability.
Alpha-Mold supports clients across industries with custom LSR solutions that balance cost-efficiency, design precision, and regulatory compliance. Whether you need rapid prototyping or full-scale production, our team is ready to assist.
