Liquid Silicone Injection Molding Services
Liquid Silicone Injection Molding (LSIM) is a versatile manufacturing process that involves injecting a liquid silicone compound into a heated mold, where it cures to create a final part. This process offers numerous benefits for various applications due to its flexibility, durability, and resistance to high temperatures.
Key characteristics of LSIM include:
- Liquid silicone compound is injected into a heated mold
- Compound cures when combined with a catalyst in the mold
- Permanent molded state, ideal for applications where the part needs to retain its shape and properties over time
Advantages of Liquid Silicone Rubber (LSR)
Benefit of using liquid silicone injection molding is the ability to produce parts with complex geometries and features, such as those found in drug delivery products or medical devices. This is because LSR can be molded into shapes that would be difficult or impossible to achieve with traditional methods like thermal or compression molding.
It’s also worth noting that LSR is a thermosetting polymer, which means its molded state is permanent. Once it is set, it cannot be melted again like a thermoplastic. This makes it an ideal material for applications where the part needs to retain its shape and properties over time, such as in medical devices or equipment.
Applications of LSIM
LSIM is a versatile technology with a wide range of applications across various industries. Two common areas where this technology is utilized by us:
Medical Applications
- Diagnostic equipment
- Surgical instruments
- Pharmaceutical equipment and packaging (e.g., stoppers and seals)
Baby Products
- Anti-colic valves
- Other baby-related items
Liquid Silicone Injection Molding Process Flow Diagram
A top section with diagrams showing how the material flows from the injection part (barrel and screw) into the mold.
Two containers labeled A and B, connected to an LSR injection system, indicating that this is a dual-component process.
A bottom section featuring various industrial machines used in producing injection-molded products. This includes a close-up view of the machinery with labeled parts, providing insight into how it works.
Overall, the image serves as an informative resource for those interested in industrial manufacturing and materials engineering.
Mold Material Specifications and Hardness Ratings for LSIM
| Material Type | Specifications | Representative Product Name | Hardness (HRC) | Remarks |
|---|---|---|---|---|
| SUS | STAVAX | Quenched and Tempered Material (Non-Sintered) | 33 | |
| SUS | PSL | 35 | ||
| AISI | NAK55 | 40 | ||
| SUS | STAVAX | Sintered (Tempered Steel) | 52 | |
| SUS | ELMAX | 57 | ||
| SKD11 | PD613 | 60 | ||
| SC | S50C | Template Section | 13 | Prone to rust |
| SUS | RAMAX | 33 | Not easy to rust, more expensive |
Key Features and Capabilities
- Equipment: Handles high-viscosity materials, producing complex parts with intricate details.
- Materials: Liquid Silicone Rubber (LSR) exhibits:
- High-temperature resistance: up to 250°C (482°F)
- Low-temperature flexibility
- Chemical resistance: fuels, oils, cleaning agents
- Biocompatibility: suitable for medical devices and implants
- High transparency: useful for visibility or optical clarity
- Formulations: Variables such as:
- Cure time
- Elastic modulus
- Tensile strength can be adjusted to tailor LSR materials for specific performance requirements.
- Design Flexibility: Allows creation of complex shapes and features with high precision, providing flexibility and durability in the final product.
Benefits for Your Application
Design Considerations and Best Practices
When designing parts for injection molding, consider:
- Designing for manufacturability (DFM)
- Considering end-use purpose and environment
- Uniform wall thickness and draft angles
- Minimizing sink marks and voids
By following these guidelines and best practices, you can create designs that are functional, manufacturable, and cost-effective. Send us your design for a review and we'll provide suggestions to help you achieve optimal results.
Manufacturing Capabilities and Certifications
Our manufacturing capabilities include compression, injection, and extrusion silicone molding processes. We are committed to quality and environmental standards, as reflected in our certifications:
- ISO 9001
- 45001
- 14001 certifications and comply with FDA guidelines for food-grade and skin-safe products.
We prioritize supply chain flexibility, offering on-demand manufacturing services with options for bridge tooling, just-in-time (JIT) production, standard production, and dual-sourcing strategies.
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No. 49, Zhongao Road, Fenggang Town, Dongguan, Guangdong, China