Liquid Silicone Rubber Injection Molding (LSR) is an advanced silicone rubber processing technology, particularly suitable for the production of microseals. As a high-performance silicone rubber material, phenyl silicone rubber can fully utilize its advantages through the LIM process. The following details the advantages of LIM phenyl silicone in microseal production from multiple perspectives:

1. Characteristics of the LIM Process
Liquid injection molding is a process in which a two-component liquid silicone rubber (component A/B) is precisely mixed, injected into a mold, and then cured under heating. This process offers the following notable features:

High-precision molding capability: Achieving dimensional accuracy of ±0.01mm, it is particularly suitable for the production of micro-seals.

Fast curing cycle: Typical molding cycles are only 20-120 seconds, with production efficiency 3-5 times that of compression molding.

Low scrap rate: Using cold runner technology, the scrap rate can be kept below 2% (compared to 15-30% for traditional compression molding).

Fully automated production: From raw material mixing to finished product demolding, the entire process is automated, achieving a pass rate exceeding 99.5%.

Complex structures Structure: Capable of filling fine structures as small as 0.01mm, suitable for manufacturing micro-complex seals.

II. Characteristics of Phenyl Silicone in Liquid Injection Molding
Phenyl silicone is a special silicone rubber material that exhibits the following excellent properties during liquid injection molding:

Heat Resistance: Applicable temperature range -40 to 230°C, meeting sealing requirements in high-temperature environments.
Radiation Resistance: Excellent resistance to radiation degradation, suitable for applications in specialized environments.
Medical-Grade Purity: Extractables <0.1%, FDA/ISO certified. 10993 Certification
Vulcanization Characteristics: Platinum-catalyzed addition reaction, no by-products
Physical Properties: Tear strength >25 kN/m, uniform and stable performance
Low Viscosity: Viscosity 500-5,000 mPa·s, suitable for filling microstructures

III. Core Advantages Over Compression Molding
Liquid injection molding of phenyl silicone offers the following significant advantages over traditional compression molding in the production of microseals:

Comparison Dimensions: Liquid Injection Molding (LSR) Compression Molding (HCR)
Raw Material Form: Low viscosity liquid (similar to honey) High viscosity solid
Processing Method: Precision metering and mixing → Cold runner injection → Manual cutting → Mold filling
Production Efficiency: 20-120 seconds/piece, 2-10 minutes/piece
Molding Accuracy: ±0.01mm, ±0.1mm to ±0.3mm
Structural Complexity: Can fill microstructures as fine as 0.01mm, Suitable for simple structures
Surface Quality No parting lines, high finish. Parting lines may be present.
Scrap rate: <2% (15-30%)
Automation level: Fully automated, unmanned production. Manual operation required.

IV. Specific Application Advantages in Microseal Production
Micro-complex structure molding: Capable of producing micro-seals as thin as 0.1mm, meeting the precision requirements of consumer electronics, medical devices, and other applications.
Multi-cavity simultaneous production: Capable of molding micro-seals with over 128 cavities in a single shot, significantly improving production efficiency.
High consistency: Fully automated control ensures consistent performance for each seal, ensuring excellent batch stability.
No post-processing required: No trimming required after molding, ready for immediate use.
Special property enhancement: Functional additives can be added to achieve special properties such as conductivity and antibacterial properties.
Environmental Advantages: No volatile organic compound emissions, meeting environmental requirements.

V. Typical Applications
Smart Device Waterproof Seals: IP68-rated waterproof seals for smart rings and watches, with a molding accuracy of 0.1mm.
Medical Micro Seals: Manufacturing sterile seals for medical catheters, valves, and other devices with high biocompatibility.
Electronic Device Seals: Manufacturing waterproof seals for consumer electronics with a yield rate exceeding 98%.
Automotive Micro Seals: Precision seals for sensors, connectors, and other components.
Optical Device Seals: Manufacturing dust-proof seals for optical instruments with a high surface finish.