Liquid silicone has the characteristics of high transparency, soft, resilient, non-toxic and tasteless, it is widely used in the maternal and child industry, especially the silicone baby nipple. Most of the baby nipples are made of liquid silicone by LSR injection molding machine.
The silicone baby bottle nipple mold is specially designed for high-precision liquid silicone rubber (LSR) injection molding production. Featuring a 16-cavity cold runner system, the mold delivers stable mass production efficiency, excellent dimensional consistency, and reduced material waste. It is widely used for manufacturing food-grade and medical-grade silicone baby bottle nipples with high transparency, softness, and safety performance.
The production process begins by installing the material barrels onto the dosing unit and connecting the chiller and air compressor to the LSR injection molding machine. After the cold runner nipple mold is mounted and heated to the required molding temperature, the liquid silicone material is precisely injected into the mold cavities. The molded nipples are automatically demolded through air blow systems or robotic arms, enabling fully automated production.
After molding, the silicone nipples are transferred to an oven for secondary vulcanization at 200°C for approximately 4 hours. This process improves material stability, removes volatile substances, and ensures compliance with food-grade and medical-grade safety standards. The nipple holes and air intake valves are then precisely punched using dedicated punching equipment before the final cleaning and packaging process.
Mold Information
| Mold Core Material | S136H |
| Mold Base Material | P20 |
| Number of Cavities | 16 |
| Runner Type | Cold Runner |
| Product Name | Silicone Baby bottle nipple |
| Number of cold nozzle | 16 |
A: The mold core uses S136H steel with excellent corrosion resistance and polishing performance, while the mold base uses durable P20 steel for stable long-term production.
A: The cold runner system helps reduce raw material waste, improve molding consistency, and maintain stable LSR flow during production.
A: Secondary vulcanization at 200°C improves the physical properties of the silicone material, removes residual volatile substances, and ensures compliance with food-grade and medical-grade safety standards.
A: Yes. The mold can be customized for various nipple structures, sizes, flow rates, and anti-colic designs according to customer requirements.
