Recently, Dalian Jiachuang Metal Manufacturing Co., Ltd. (hereinafter referred to as "Jiachuang Metal") has achieved a major technological breakthrough in the field of sand casting. Its independently developed patent technology has successfully solved the manufacturing challenges of OH pump steel casting impellers. According to third-party testing, the comprehensive qualification rate of impellers has increased from the industry average of 85% to 99%, and the production cycle has been shortened by 40%. This achievement not only fills the technical gap in high-end pump castings in Northeast China but also marks the innovative strength of local small and medium-sized enterprises in industrial upgrading.
Technological Breakthrough: Patented Molds Reshape Industry Standards
As a core equipment for industrial fluid transportation, OH pumps require their impellers to withstand long-term impacts from high temperatures (300℃), high pressure (8MPa), and highly corrosive media. Traditional sand casting processes often lead to defects such as sand mold collapse and air holes due to the narrow flow channels (minimum 8mm) and thin blades (3mm) of impellers, which have long been a pain point in the industry. The R&D team of Jiachuang Metal has adopted dual-valve pressure-controlled mold technology, installing independent air valves in the upper and lower sand boxes to adjust pressure. Combined with a constant-temperature heat dissipation channel (75-80℃) in the mold base, the dimensional accuracy of flow channels is controlled within ±0.2mm, completely solving the cracking problem of traditional molds caused by temperature differences. This technology has been applied to orders from multiple energy enterprises; in June 2025, a single mold order reached 8.6 million yuan, a year-on-year increase of 120%.
Green Production: Full-Chain Recycling Technology Cuts Costs and Boosts Efficiency
While improving precision, Jiachuang Metal has simultaneously promoted the innovation of green casting. Its three-stage sand recycling system adopts PP filtration, magnetic iron removal, and hot air drying processes, increasing the recycling rate of used sand from 60% to 96%. This reduces annual new sand consumption by 300 tons and lowers overall costs by 38%. In the smelting process, intelligent temperature-controlled electric furnaces are used, which automatically adjust power (500-800kW) and pouring speed (0.5-1.2m/s) according to steel grades. This increases the uniformity of molten steel by 25%, reduces the air hole rate of 3mm thin-walled blades from 5.2% to 0.3%, and ensures mechanical properties fully comply with the GB/T 11352-2022 standard (National Standard of the People's Republic of China for Carbon Steel Castings for General Engineering).
Market Verification: High-End Orders Drive Capacity Expansion
Technological breakthroughs have been directly converted into market competitiveness. Relying on high-precision impeller products, Jiachuang Metal has successfully won bids for marine OH pump projects (ballast water systems) from a domestic shipbuilding heavy industry group and high-temperature medium transportation orders from large coal chemical enterprises. In the first half of 2025, the proportion of high-end product orders exceeded 70%, and the company has reached technical cooperation with Southeast Asian pump enterprises, with the export volume of customized impellers increasing by 150% year-on-year. To meet capacity demands, the company recently added 3 sets of 3-ton intelligent pouring trolleys, and its capacity is expected to reach 12,000 tons by 2026.
Industry Value: Patent Strategy Empowers SME Transformation
Jiachuang Metal’s innovation path provides a "small yet sophisticated" transformation model for traditional foundry enterprises. By 2025, the company has accumulated 14 national patents (including 3 invention patents), 7 of which directly serve the entire pump production chain, forming a technical barrier from mold design to quality inspection. Industry experts point out that its "patent cluster + segmented market" strategy effectively makes up for the resource shortages of small and medium-sized enterprises. Especially against the background of the revitalization of Northeast China’s old industrial bases, this model has demonstration significance for promoting the upgrading of regional equipment manufacturing.
Conclusion
From traditional sand casting to intelligent production, Jiachuang Metal has used patent technology as a lever to unlock the door to the high-end equipment manufacturing market. With the advancement of the "dual carbon" policy, its green casting technology and high-precision products will continue to release competitiveness, injecting new momentum into the high-quality development of China’s manufacturing industry.