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Dalian Jiachuang Metal Manufacturing Co., Ltd., a leading domestic supplier of pump components, recently successfully passed the rigorous certification process of TÜV Rheinland. This marks a significant breakthrough in the company's quality management and international market access, laying a solid foundation for its products to enter the global high-end market.

With the release of their 2025 semiannual reports, statistics compiled from 12 internationally renowned pump companies show that their total sales in the first half of 2025 reached approximately RMB 150.8 billion, a 19.2% year-on-year increase compared to RMB 126.46 billion in the same period last year. Of these 12 companies, only one achieved strong double-digit growth, while ten saw year-on-year increases.

Abstract: This paper systematically analyzes the causes, common processes and locations of sand hole defects in the sand casting process of BB3 type multistage pump bodies in cast steel parts, and proposes targeted solutions. Through literature review and case analysis, it was found that the defects of sand holes mainly result from insufficient strength of the molding sand, design flaws of the gating system and improper operation, and are prone to occur in the molding, core setting, closing and pouring processes. The specific locations include gates, risers, thick parts of castings and inner cavities. By optimizing the proportion of molding sand, improving the design of the gating system and strengthening process control, the occurrence rate of sand holes can be effectively reduced and the quality of castings can be improved.

At present, the company is mainly to pump valve, blower, compressor, steam turbine, propeller and other fluid mechanical parts casting, Covering oil, petrochemical, shipbuilding, coal chemical industry, water treatment, gas control, automobile manufacturing, cement, spraying, printing, LNG, power and other fields of main engine device components, Including GB, ASME / ASTM, EN, ISO, JIS, Including ordinary carbon steel, austenitic stainless steel, ferrite stainless steel, martenitic stainless steel, precipitation hardened stainless steel, double-phase stainless steel, Lewmet, Inconel, Incoloy, Hastelloy, and Monel and other nickel-based alloys, Cr26, Ni-hard and other anti-wear white mouth cast iron, involving corrosion-resistant, wear-resistant, high-temperature resistance and other high-end materials.

With the release of their 2025 semiannual reports, statistics compiled from 12 internationally renowned pump companies show that their total sales in the first half of 2025 reached approximately RMB 150.8 billion, a 19.2% year-on-year increase compared to RMB 126.46 billion in the same period last year. Of these 12 companies, only one achieved strong double-digit growth, while ten saw year-on-year increases.

Recently, Dalian Jiachuang Metal Manufacturing Co., Ltd. (hereinafter "Jiachuang Metal") has made a critical breakthrough in sand casting of steel casting impellers—the core of OH pumps—via independently developed patents.

In order to comprehensively enhance the all-round capabilities of employees, consolidate the foundation of the company and assist in the steady implementation of strategic goals, the company has carried out multiple training sessions covering core areas such as safety management, professional skills, management skills, quality system, and information management. The training scope for the year 2025 covers employees from various departments, with a doubling of training time and the number of participants is three times compared to the same period last year, achieving a breakthrough in both training scale and effectiveness, injecting strong momentum into the company's high-quality development.

With the release of their 2025 semiannual reports, statistics compiled from 12 internationally renowned pump companies show that their total sales in the first half of 2025 reached approximately RMB 150.8 billion, a 19.2% year-on-year increase compared to RMB 126.46 billion in the same period last year. Of these 12 companies, only one achieved strong double-digit growth, while ten saw year-on-year increases.

The manufacturing of multi-stage pump bodies through casting is a systematic project that integrates materials science, mold engineering, thermal processing techniques, and quality inspection. The precision control of each link directly affects the operational performance and safety reliability of the pump set. With the continuous increase in the demand for multi-stage pumps with "high head, high efficiency, and long service life" in the industrial field, casting technology also needs to develop towards greater accuracy, higher efficiency, and more environmental friendliness - for instance, by optimizing the melting and casting parameters through numerical simulation technology to reduce trial-and-error costs; using 3D printing technology to manufacture complex sand cores to enhance the accuracy of the flow channels; and promoting low-energy consumption heat treatment processes to reduce energy consumption during the production process. Only by continuously promoting technological innovation and process upgrading can the quality level of cast multi-stage pump bodies be continuously improved, providing a solid guarantee for the stable operation in the field of fluid transportation.

The moon has its phases, and people experience joy and sorrow, parting and reunion. At Dalian Jiachuang Metal, this benefit spanning both the Mid-Autumn Festival and National Day gives "reunion" and "joy" a more tangible form. With this heartwarming encouragement, all Jiachuang employees will surely devote themselves to their work with even greater enthusiasm and morale, jointly writing a brighter future for the company!