HengHui Mold achieves innovative breakthrough: Six-piece modular mold core design solves the venting problem in nut molds.

 Recently, Chongqing Henghui Precision Mold Co., Ltd. (hereinafter referred to as "Henghui Mold"), leveraging its profound technical expertise and continuous innovation capabilities, successfully developed a six-piece modular assembly mold core. This breakthrough effectively overcame the technical bottleneck of difficult exhaust and susceptibility to gas expansion in the hexagonal part of nut molds, which previously led to low mold life. This achievement has garnered high recognition and praise from numerous domestic and international customers, once again demonstrating the core strength of "Made in China" in precision manufacturing.

In the field of precision mold manufacturing, the exhaust problem in the hexagonal part of nut molds has long plagued the industry. Traditional mold designs often suffer from poor exhaust, leading to gas retention inside the mold during the injection molding process, forming bubbles or streaks. This not only affects the appearance quality of the product but also reduces the mold's service life. This problem is particularly prominent in fields such as aerospace and medical devices, where product precision and reliability requirements are extremely high. Industry data shows that the mold failure rate due to exhaust problems is as high as 30%, severely restricting production efficiency and product quality.

After in-depth market research, the Henghui Mold technical team found that existing solutions mostly rely on adding exhaust grooves or using exhaust plugs. However, these methods have limitations: exhaust grooves are prone to clogging and require frequent cleaning; exhaust plugs may affect the structural strength of the mold due to improper installation. Achieving efficient, stable, and long-lasting exhaust performance became a technical challenge that the industry urgently needed to overcome.

Facing this challenge, Henghui Mold, relying on its independently developed five-axis linkage machining center and micron-level precision control technology, spent two years successfully developing the six-piece modular assembly mold core. This technology utilizes a modular design, dividing the traditional integral mold core into six independent components. Each component has precision exhaust channels, and the following innovative designs are employed: micron-level gaps are designed between the mold core components, combined with a special surface treatment process, to form a dynamic exhaust network. During injection molding, gas can be quickly discharged through the gaps, preventing accumulation; during cooling, the gaps automatically close, preventing external impurities from entering and ensuring mold sealing. An integrated thermal deformation compensation algorithm monitors mold temperature changes in real time, automatically adjusting the gaps between components to offset the impact of thermal expansion on the exhaust effect. Tests have shown that this system allows the mold to maintain a stable exhaust efficiency of over 95% under extreme working conditions ranging from -20℃ to 150℃. The snap-fit connection design enables quick disassembly and assembly of the mold core components within 30 seconds, significantly reducing maintenance time. Simultaneously, standardized component production lowers spare parts costs and improves customer response speed.

“This innovation not only solves the exhaust problem but also redefines the mold maintenance model,” said Mr. Li, Technical Director of HengHui Mold. “Customers no longer need to shut down production to clean the exhaust grooves, nor do they need to worry about the exhaust plugs falling off, truly achieving ‘zero-maintenance’ production.”

The six-piece modular mold core assembly has generated a strong response in the industry since its launch. In the aerospace field, a well-known international aerospace component manufacturer reported after testing: “This technology has increased the lifespan of our titanium alloy nut molds from 50,000 cycles to 120,000 cycles, and the product pass rate has increased from 92% to 99.5%, significantly reducing overall costs.” In the medical device industry, a European company commented: “HengHui Mold’s solution perfectly solved the exhaust problem of high-precision medical nuts, helping us obtain FDA certification and open up the US market.”

In the domestic market, several automotive and electronics companies have already included this technology in their standard procurement lists. The supply chain head of a new energy vehicle brand stated: “HengHui Mold’s six-piece modular mold core has increased the production efficiency of our battery pack nuts by 40%, and the mold scrap rate has dropped to zero, providing crucial support for production capacity ramp-up.”

This breakthrough by HengHui Mold is another milestone in its globalization strategy. In recent years, the company has accelerated its expansion into the international market through a “technology-driven + localized service” model: In January 2026, three batches of complete sets of customized molds were successfully delivered to European customers, covering fields such as automotive parts and precision electronic components, passing acceptance with “zero defects,” consolidating the brand image of “Made in China with precision.” In August 2025, high-strength titanium alloy screw molds customized for a Brazilian aerospace company passed rigorous acceptance tests, and the first batch of products was shipped to South America, demonstrating international recognition of its technical capabilities. At the Vietnam International Industrial Exhibition, the five-axis linkage machining center dynamic demonstration system attracted attention from companies in many countries. The dynamic compensation system is adapted to local production needs, providing customized solutions for Southeast Asian customers.

"Precision manufacturing knows no borders, but technological standards must be in our own hands," emphasized Hou Hui, General Manager of HengHui Mould. "In the future, we will continue to use micron-level precision as our foundation, promoting the upgrade from 'Made in China' to 'Precision Manufacturing in China,' and providing higher-quality solutions for global customers."

HengHui Mould's six-piece modular assembly mold core not only solved the company's own technical challenges but also provided a replicable innovative model for the industry. According to experts from the China Mould Industry Association, this technology will increase the average lifespan of domestic precision molds by 30% and reduce maintenance costs by 50%, helping China move from a "major mold manufacturing country" to a "strong mold manufacturing country."

Currently, HengHui Mould has collaborated with several research institutions to extend the six-piece modular design concept to more mold types and explore its integration with technologies such as digital twins and AI quality inspection. As "Precision Manufacturing in China" continues to rise in the global value chain, HengHui Mould is using innovation as its pen to write a new chapter in China's high-end manufacturing.