What Is LSR Injection Molding & Its Industrial Applications
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- Siliconeplus Editor
- Issue Time
- May 19,2026
Summary
Learn everything about LSR injection molding, working principle, production process, advantages and wide applications in medical, automotive, 3C electronics and beauty industries.
What Is LSR Injection Molding & Its Industrial Applications
In modern precision silicone manufacturing, LSR injection molding has gradually replaced traditional solid silicone molding and become the mainstream production technology for high-precision silicone parts. Many global buyers are confused about what LSR molding is and its core advantages. Today we will make a detailed professional explanation.
LSR stands for Liquid Silicone Rubber, LSR injection molding is a high-efficiency automated molding process that injects liquid two-component silicone raw materials into high-precision molds, completes rapid vulcanization and molding at high temperature, and produces finished silicone parts in one shot.
1. Basic Working Principle of LSR Injection Molding
- Mix liquid A/B silicone raw materials evenly according to fixed proportion
- Inject mixed liquid silicone into closed precision mold
- Heat the mold to realize fast curing and vulcanization shaping
- Automatic demoulding to get finished smooth silicone products without secondary trimming
2. Core Advantages of LSR Injection Molding
- High molding efficiency: Fast curing speed, suitable for large-scale mass production
- High precision: Stable product size, ultra-thin wall and tiny structure can be realized
- Smooth surface: No burrs, no bubbles, high appearance level
- Safe and environmental: No odor, non-toxic, easy to pass food grade, medical grade certification
- Wide temperature resistance: Stable performance under high and low temperature environment
- Long service life: Anti-aging, yellowing-resistant, durable for long-term use
3. Main Application Industries of LSR Molded Parts
- Medical industry: Medical catheters, surgical instrument accessories, sterile silicone parts
- Automotive industry: EV waterproof seals, high voltage wire accessories, auto interior soft parts
- 3C electronics: Headphone accessories, wearable watch parts, electronic waterproof gaskets
- Beauty & health: Facial cleansing brush heads, skin care silicone accessories, massage silicone parts
- Daily household: Baby silicone products, kitchen food grade silicone accessories
4. Difference Between LSR Molding And Traditional Solid Silicone Molding
LSR liquid silicone molding is more suitable for high-precision, high-demand, high-volume orders; traditional solid silicone is more suitable for simple structure and low-cost ordinary silicone parts. As global product quality requirements improve, LSR injection molding has become the preferred process for most medium and high-end silicone purchasing customers.
Conclusion
LSR injection molding is the core advanced technology of modern silicone industry. It not only improves production efficiency and product qualification rate, but also meets the strict safety, precision and environmental protection standards of all high-end industries.
If you have customized LSR silicone part demands, welcome to contact us for professional solution support.