Hopewell specializes in liquid silicone rubber (LSR) injection molding for flow control valves used in dispensing closures, including cross-slit valves, duckbill valves, and umbrella valves.

Our modern LSR molding workshops are equipped with advanced vertical and horizontal injection machines, supporting high-volume, high-consistency production of silicone valves for plastic bottle closures. From material formulation and valve structure optimization to automated molding and inspection, every process is controlled under ISO-certified quality management systems to ensure consistent performance, sealing reliability, and product safety.

As one of the early manufacturers in China to achieve stable mass production of silicone cross-slit valves for liquid dispensing, we continuously invest in automation and precision control. For large-scale dispensing closure projects, we develop automated molding, trimming, and inspection systems that significantly reduce defect rates, improve output efficiency, and lower unit cost—enabling customers to scale their packaging programs with confidence.

We collaborate closely with customers to customize silicone valve solutions based on application requirements such as flow rate, squeeze force, leak resistance, anti-drip performance, and compatibility with various plastic closures.

Plastic injection molding is the core of Hopewell's manufacturing capability as a professional plastic closures manufacturer. Our facilities focus on the production of flip top caps, screw caps, dispensing closures, beverage closures, and fully customized plastic bottle caps for food, beverage, personal care, and household packaging.

Equipped with high-speed, multi-cavity injection machines and automated assembly systems, we support both high-volume standardized closures and customized dispensing caps with complex structures. For mass-market programs, we invest heavily in automated molding, assembly, and inspection lines to reduce labor dependency, minimize variation, and ensure long-term supply stability.

From concept development and prototype validation to full-scale production, Hopewell provides end-to-end plastic injection molding solutions for dispensing closures. Whether you need a flip top cap with silicone valve, a leak-proof beverage closure, or a fully customized plastic bottle cap, our engineering and production teams deliver reliable quality, competitive cost, and scalable manufacturing support.