At SiTech, we are dedicated exclusively to Liquid Silicone Rubber (LSR) injection molding, a process that offers superior precision, efficiency, and performance for a wide range of silicone products. Our specialized manufacturing capabilities enable us to handle everything from rapid prototyping to large-scale production, delivering high-quality components that meet the most demanding specifications.

Why Choose Liquid Injection Molding?

Liquid Silicone Rubber is known for its exceptional durability, making it an ideal choice for various industries. It offers:

• High tear and tensile strength
• Excellent flexibility
• Insulating and conductive properties
• Biocompatibility
• Durometer ranges from 20 to 80 Shore A
  
  

Additionally, LSR remains stable in extreme temperatures, ranging from -75°F to 400°F (-60°C to 200°C). Its resistance to water, oxidation, bacteria, certain chemicals, and its non-corrosive nature make it an optimal choice for long-lasting, high-performance products.

The Liquid Injection Molding Process

Liquid Injection Molding (LIM) is a custom molding method for high-viscosity, two-part liquid silicone rubber (LSR). Here’s how it works:

• Raw materials, sealed to prevent contamination, are metered automatically in a 1:1 ratio and mixed with the desired pigment.
• The material is then injected into a hot mold cavity from a water-cooled barrel that keeps it from catalyzing prematurely.
• Once inside the hot mold cavity, the material cures in a matter of seconds. The mold opens, the part is ejected, and the process is repeated.

This process results in precise, repeatable, and cost-effective products.

Key Advantages of SiTech’s Liquid Injection Molding:

• Automation: Our LIM machines automate several critical steps that traditional compression molding cannot match, resulting in faster cycle times, reduced labor costs, and significant savings for our customers.
• Scalable Production Capabilities: Our LIM machines are equipped to handle production runs of any size, from low to high volume. These precision instruments, operated by experienced molders, allow for meticulous control over shot size, temperature, pressure, injection rate, and cycle time. This ensures minimal waste and consistent product quality, regardless of the production scale. Whether you need small prototype batches or large-scale production, our LIM technology, enhanced by a platinum curing catalyst, enables us to optimize cycle times and reduce costs efficiently across all volumes.
• Closed-Loop System: Because LIM operates within a sealed, closed-loop system, the raw material remains uncontaminated from start to finish. This guarantees a high level of product quality and consistency, ensuring you receive reliable components every time.
  
  
  

Physical Properties of Liquid Silicone Rubber

LSR offers a wide range of physical properties depending on the durometer, which can be customized based on your project requirements. Below are some typical values: