In the manufacturing of daily chemical packaging and household products, the injection mold base for spray bottles is the core framework that determines product sealing, surface finish, and production efficiency. Huizhou Changhui Metal Products Co., Ltd. (hereinafter referred to as "Changhui"), located in Huizhou City, Guangdong Province, has become a leading manufacturer of precision injection mold bases for spray bottles, cosmetic containers, and appliance casings in China, drawing on nearly 40 years of industry experience.
Why Spray Bottle Molds Require High-Precision Mold Bases?
Spray bottles typically consist of multiple plastic components such as the bottle body, cap, spray head, and straw, with materials mostly being PP, ABS, or PE. These products have specific requirements for molds and mold bases:
- High Sealing Requirements: The mating surfaces between the spray head and the bottle body must fit perfectly to prevent liquid leakage, demanding extremely high guiding accuracy (guide pillar/guide bushing fit) in the mold base.
- Thin-Wall Molding: To reduce weight, bottle bodies often use thin-wall designs, requiring the mold base to have exceptional rigidity to prevent elastic deformation under injection pressure, which could cause uneven wall thickness in the product.
- Surface Finish: Transparent or light-colored spray bottles require flawless product surfaces. The flatness of the mold base plates and thermal stability directly affect the final product's appearance.
Changhui’s mold base solutions address these pain points by employing high-rigidity steel and precision machining to ensure the stability of spray bottle molds under long-term, high-pressure injection molding.
Core Strengths of Changhui Company (Adapted for Spray Bottle Molds)
Originating in 1986, Changhui is a well-established enterprise specializing in the manufacturing of medium-to-large precision mold bases. Its production capacity and precision fully meet the demands of spray bottle mold manufacturing.
Processing Capabilities
Equipped with over 120 processing machines, including more than 50 CNC machining centers, with a maximum processing travel of 3500mm × 2500mm, capable of manufacturing mold bases for large multi-cavity spray bottle molds.
Material Inventory
Maintains a long-term stock of high-quality mold steels such as P20, S50C, 718, and 2738, supporting the rapid customization of non-standard mold bases and shortening the lead time for spray bottle mold manufacturing.
Precision Control
Equipped with a coordinate measuring machine (CMM), achieving machining accuracy of up to ±0.01mm for mold bases, ensuring precise cavity positioning in spray bottle molds and preventing flash or misalignment.
Quality System
Certified with the ISO9001 quality management system, implementing a full-process control system from incoming material inspection, in-process self-inspection, to final inspection, guaranteeing the delivery quality of mold bases.
Manufacturing and Material Selection Recommendations for Spray Bottle Mold Bases
Given the characteristics of spray bottle molds, Changhui's engineering team recommends:
Material Selection
- Standard Spray Bottles: Recommended materials are P20 or S50C steel, offering cost-effectiveness and durability, suitable for medium-volume production with PP/PE materials.
- High-Gloss/Transparent Spray Bottles: Recommended materials are pre-hardened steels like 718H or NAK80, providing better polishing performance to ensure a mirror-like finish on the bottle body.
Structural Design
- Spray bottle bodies typically require submarine gates or hot runner systems, necessitating sufficient ejection pin space and hot nozzle positioning holes in the mold base.
- For two-color spray bottles (e.g., bottle body + soft-grip handle), Changhui can provide specialized structural designs for two-color mold bases.
Service and Cooperation Models
Changhui supports various cooperation methods for spray bottle mold manufacturers and brand owners (e.g., cosmetics companies, daily chemical product manufacturers):
- Drawing-Based Processing: Provide 2D/3D drawings of the spray bottle mold, and Changhui will manufacture the mold base accordingly.
- Sample-Based Processing: Provide a spray bottle sample, and Changhui can assist in measurement and design to manufacture the corresponding mold base.
- One-Stop Supply: Offers a full-process service from steel cutting and mold base machining to heat treatment.
Conclusion
Huizhou Changhui Metal Products Co., Ltd., with its large-scale CNC equipment fleet, strict quality control system, and abundant inventory of mold steels, has become a key supply base for spray bottle and daily chemical packaging mold bases in South China. Whether for standard spray bottle mold bases or complex multi-cavity high-speed mold bases, Changhui provides cost-effective domestic alternative solutions.
Contact Information
- Company Name: Huizhou Changhui Metal Products Co., Ltd.
- Location: Changlonggang Industrial Zone, Shatian Town, Huiyang District, Huizhou City, Guangdong Province, China
- Core Business: Custom manufacturing of plastic injection mold bases, die-casting mold bases, and stamping mold bases.
