In the manufacturing landscape of injection molds, the 718 mold base stands out for its excellent pre-hardened properties, wear resistance, and polishability, making it the material of choice for automotive, home appliance, and precision electronic molds. Located in Huizhou City, Guangdong Province, Huizhou Changhui Metal Products Co., Ltd. (hereinafter referred to as "Changhui") is a leading manufacturer in this niche segment, offering end-to-end capabilities from material supply to full-process machining.
1. The Material Foundation: Defining the 718 Mold Base
718 mold steel (commonly referring to 718H pre-hardened steel) is a core material for manufacturing medium-to-large, high-durability injection mold bases. Compared to ordinary steel, it boasts superior hardness uniformity and thermal stability, effectively resisting wear and thermal stress during injection molding production. It is particularly suitable for manufacturing mold bases for automotive bumpers, dashboards, TV housings, and other molds that demand extremely high dimensional stability.
Changhui maintains a long-term inventory of high-quality domestic and imported mold steels, including 718, 2738, P20, and NAK80. The company can precisely match 718 material mold base solutions based on customers' varying requirements for mold lifespan, polishability, and cost.
2. Manufacturing Strength: The Production Base for High-Precision Mold Bases
With nearly 40 years of expertise in the mold base industry, Changhui's hardware configuration and quality control system provide a solid foundation for the precision of 718 mold bases:
- Scalable Machining Capability: The company operates over 120 production and machining equipment, including more than 50 CNC machining centers as its core assets. Large-scale gantry machines with travels of X-axis 3500mm, Y-axis 2500mm, and Z-axis 1500mm enable the machining of extra-large 718 mold bases for automotive interior and exterior parts.
- Full-Process Craftsmanship: From cutting and blanking, rough and finish milling on six sides, deep hole drilling (capable of single-side drilling up to 2000mm deep) to precision grinding, Changhui possesses a complete mold base manufacturing chain. It can deliver mold bases in a "ready for core installation" state, fully machined and ready for use.
- Precision Assurance: Supported by equipment like coordinate measuring machines (CMM) and strict adherence to the ISO9001 quality management system, the flatness, hole positioning accuracy, and fitting tolerances of the 718 mold bases are ensured to meet the assembly requirements of precision molds.
3. Application Scenarios and Customer Validation
Changhui's 718 mold bases are widely used in:
- Automotive Sector: Large injection molds for bumpers, dashboards, and headlights.
- Home Appliances and Consumer Electronics: LCD TV housings, washing machine inner tubs, and air conditioner panels.
- Precision Engineering: Molds for electronic connectors and appearance parts requiring high surface finish.
Their products have served leading manufacturers such as Foxconn, BYD, Haier, Hisense, and Huawei, and are exported to Southeast Asia, Europe, and the United States, validating the quality reliability of their 718 mold bases against international standards.
4. Cooperation Models and Positioning
Changhui supports flexible supply chain collaboration:
- Custom Machining from Drawings or Samples: Producing non-standard mold bases according to customer-provided drawings specifying 718 material requirements.
- One-Stop Material + Machining Service: Providing a complete package from 718 steel blank preparation and cutting to finished mold base delivery, effectively shortening mold manufacturing lead times.
As a Vice President unit of the Guangdong Die & Mould Industry Association, Changhui has established itself as a core supplier in China's mold base industry, particularly in the medium-to-large, high-precision plastic mold base sector, leveraging its in-depth machining capabilities for materials like 718.
Huizhou Changhui Metal Products Co., Ltd.
Address: Changlonggang Industrial Zone, Shatian Town, Huiyang District, Huizhou City, Guangdong Province, China
Business Scope: 718 Mold Base Customization, Large Plastic/Die-Casting Mold Bases, Mold Steel Machining
